1
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Lorrain-Soligon L, Muller K, Delaby C, Thiéry D, Moreau J. Interaction between females and males grapevine moth Lobesia botrana modifies further mating preference. JOURNAL OF INSECT PHYSIOLOGY 2024; 156:104668. [PMID: 38942138 DOI: 10.1016/j.jinsphys.2024.104668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 06/22/2024] [Accepted: 06/24/2024] [Indexed: 06/30/2024]
Abstract
During reproduction, females may boost their fitness by being selective based on direct material benefits provided by the males, such as nuptial gifts. In Lepidoptera, male provides a spermatophore containing nutrients. However, virgin males produce a bigger spermatophore, containing spermatozoa and nutrients, allowing higher female fertility. Lepidoptera females that could detect the sexual status of males may thus prefer a male without previous mating experience (i.e. a virgin male). This mate selection could be achieved by the use of chemical indices, such as sexual pheromones and cuticular compounds, known to be possibly exchanged during reproduction, and which can be indicators of a previous mating experience and known to be possibly sources of information exchanged. In this study, we experimentally presented Lobesia botrana virgin males with females in order for them to be exposed to females' natural sexual pheromones or cuticular compounds. 12 or 48 h after the exposure of males to either females' sexual pheromones or cuticular compounds, these males were confronted to naïve females, which have a choice between them or a virgin non-exposed males. We highlighted that, despite producing a spermatophore of similar volume, all exposed virgin males were less likely to mate with females 12 h after exposure, while after 48 h of exposure this is only the case for virgin males exposed to sexual pheromones. L. botrana females may thus discriminate male sexual experience based on chemical cues (either from cues transferred directly from females to males, or from changes in the cuticular or pheromone males' profile) indicating past mating experiences. Mating duration was longer for males exposed to sexual pheromones after 12 h only, and for males exposed to cuticular compounds after 48 h only. Pheromones signal might be more persistent over time and seems to more easily gather information for males. The physiological reasoning behind this result still needs to be investigated.
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Affiliation(s)
| | - Karen Muller
- Biogéosciences, UMR 6282 CNRS, Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Camille Delaby
- Biogéosciences, UMR 6282 CNRS, Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France
| | - Denis Thiéry
- INRA UMR 1065 Santé et Agroecologie du Vignoble, Institut des Science de la Vigne et du Vin, Ave E. Bourleaux, F-33883 Villenave d'Ornon Cedex, France; Université de bordeaux, INRA UMR 1065, Save, Bordeaux Sciences Agro, Ave E. Bourleaux, 33883 Villenave d'Ornon Cedex, France
| | - Jérôme Moreau
- Biogéosciences, UMR 6282 CNRS, Université de Bourgogne, 6 Boulevard Gabriel, 21000 Dijon, France; Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS & La Rochelle Université, 79360 Villiers-en-bois, France
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2
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Shenoi VN, Brengdahl MI, Grace JL, Eriksson B, Rydén P, Friberg U. A genome-wide test for paternal indirect genetic effects on lifespan in Drosophila melanogaster. Proc Biol Sci 2022; 289:20212707. [PMID: 35538781 PMCID: PMC9091837 DOI: 10.1098/rspb.2021.2707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Exposing sires to various environmental manipulations has demonstrated that paternal effects can be non-trivial also in species where male investment in offspring is almost exclusively limited to sperm. Whether paternal effects also have a genetic component (i.e. paternal indirect genetic effects (PIGEs)) in such species is however largely unknown, primarily because of methodological difficulties separating indirect from direct effects of genes. PIGEs may nevertheless be important since they have the capacity to contribute to evolutionary change. Here we use Drosophila genetics to construct a breeding design that allows testing nearly complete haploid genomes (more than 99%) for PIGEs. Using this technique, we estimate the variance in male lifespan due to PIGEs among four populations and compare this to the total paternal genetic variance (the sum of paternal indirect and direct genetic effects). Our results indicate that a substantial part of the total paternal genetic variance results from PIGEs. A screen of 38 haploid genomes, randomly sampled from a single population, suggests that PIGEs also influence variation in lifespan within populations. Collectively, our results demonstrate that PIGEs may constitute an underappreciated source of phenotypic variation.
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Affiliation(s)
| | | | - Jaime L. Grace
- Department of Biology, Loyola University Chicago, 1032 W. Sheridan Rd., Chicago, IL 60660, USA
| | - Björn Eriksson
- Unit of Chemical Ecology, Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, Box 102, 230 53 Alnarp, Sweden
| | - Patrik Rydén
- Department of Mathematics and Mathematical Statistics, Umeå University, 901 87 Umeå, Sweden,Computational Life Science Cluster (CLiC), Umeå University, 901 87 Umeå, Sweden
| | - Urban Friberg
- IFM Biology, Linköping University, 581 83 Linköping, Sweden
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3
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Morimoto J. Parental ecological history can differentially modulate parental age effects on offspring physiological traits in Drosophila. Curr Zool 2021; 68:391-399. [PMID: 36090145 PMCID: PMC9450179 DOI: 10.1093/cz/zoab081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/24/2021] [Indexed: 11/16/2022] Open
Abstract
Parents adjust their reproductive investment over their lifespan based on their condition, age, and social environment, creating the potential for inter-generational effects to differentially affect offspring physiology. To date, however, little is known about how social environments experienced by parents throughout development and adulthood influence the effect of parental age on the expression of life-history traits in the offspring. Here, I collected data on Drosophila melanogaster offspring traits (i.e., body weight, water content, and lipid reserves) from populations where either mothers, fathers both, or neither parents experienced different social environments during development (larval crowding) and adulthood. Parental treatment modulated parental age effects on offspring lipid reserves but did not influence parental age effects on offspring water content. Importantly, parents in social environments where all individuals were raised in uncrowded larval densities produced daughters and sons lighter than parental treatments which produced the heaviest offspring. The peak in offspring body weight was delayed relative to the peak in parental reproductive success, but more strongly so for daughters from parental treatments where some or all males in the parental social environments were raised in crowded larval densities (irrespective of their social context), suggesting a potential father-to-daughter effect. Overall, the findings of this study reveal that parental ecological history (here, developmental and adult social environments) can modulate the effects of parental age at reproduction on the expression of offspring traits.
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Affiliation(s)
- Juliano Morimoto
- School of Biological Sciences, University of Aberdeen, Zoology Building, Tillydrone Avenue, Aberdeen AB24 2TZ, UK
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4
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Hauber ME, Abolins-Abols M, Kim CR, Paitz RT. Inter-Individual Variation in Anti-Parasitic Egg Rejection Behavior: A Test of the Maternal Investment Hypothesis. Integr Org Biol 2021; 2:obaa014. [PMID: 33791557 PMCID: PMC7671127 DOI: 10.1093/iob/obaa014] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Hosts of avian brood parasites may reduce or forego the costs of caring for foreign young by rejecting parasitic eggs from the nest. Yet, many host species accept parasitic eggs and, even among rejecter species, some individuals go on to incubate and hatch them. The factors explaining the variation in egg rejection between species have received much theoretical and empirical attention, but the causes of intraspecific variation in different individuals’ propensity for accepting parasitic eggs are less well understood. Here we tested the maternal investment hypothesis, which predicts that hosts with costlier clutches will be more likely to reject parasitic eggs from their nest. We studied variation in the egg rejection responses of American robins (Turdus migratorius), a robust egg-rejecter host of the brood parasitic brown-headed cowbird (Molothrus ater), to 3D-printed cowbird-sized eggs which were painted dark blue, a color known to induce variable and repeatable egg rejection responses in individual robins. Costlier clutch investment was estimated by earlier laying date, larger clutch size, heavier unincubated yolk mass, and variable yolk steroid hormone concentrations. There was no statistical support for most of our predictions. However, we detected more concentrated and greater overall amount of deoxycorticosterone deposited in egg yolks of rejecters relative to acceptors, although this accounted for no more than 14% of variance in the data. Future work should test experimentally the potential physiological linkage between maternal egg yolk steroid investment and egg rejection propensity in this and other host species of avian brood parasites.
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Affiliation(s)
- M E Hauber
- Department of Evolution, Ecology, and Behavior, School of Integrative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - M Abolins-Abols
- Department of Evolution, Ecology, and Behavior, School of Integrative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.,Department of Biology, University of Louisville, Louisville, KY 40292, USA
| | - C R Kim
- Department of Evolution, Ecology, and Behavior, School of Integrative Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - R T Paitz
- School of Biological Sciences, Illinois State University, Normal, IL 61790, USA
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5
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Pei Y, Forstmeier W, Kempenaers B. Offspring performance is well buffered against stress experienced by ancestors. Evolution 2020; 74:1525-1539. [PMID: 32463119 DOI: 10.1111/evo.14026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/14/2020] [Accepted: 05/17/2020] [Indexed: 11/27/2022]
Abstract
Evolution should render individuals resistant to stress and particularly to stress experienced by ancestors. However, many studies report negative effects of stress experienced by one generation on the performance of subsequent generations. To assess the strength of such transgenerational effects we propose a strategy aimed at overcoming the problem of type I errors when testing multiple proxies of stress in multiple ancestors against multiple offspring performance traits, and we apply it to a large observational dataset on captive zebra finches (Taeniopygia guttata). We combine clear one-tailed hypotheses with steps of validation, meta-analytic summary of mean effect sizes, and independent confirmatory testing. We find that drastic differences in early growth conditions (nestling body mass 8 days after hatching varied sevenfold between 1.7 and 12.4 g) had only moderate direct effects on adult morphology (95% confidence interval [CI]: r = 0.19-0.27) and small direct effects on adult fitness traits (r = 0.02-0.12). In contrast, we found no indirect effects of parental or grandparental condition (r = -0.017 to 0.002; meta-analytic summary of 138 effect sizes), and mixed evidence for small benefits of matching environments between parents and offspring, as the latter was not robust to confirmatory testing in independent datasets. This study shows that evolution has led to a remarkable robustness of zebra finches against undernourishment. Our study suggests that transgenerational effects are absent in this species, because CIs exclude all biologically relevant effect sizes.
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Affiliation(s)
- Yifan Pei
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, 82319, Germany
| | - Wolfgang Forstmeier
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, 82319, Germany
| | - Bart Kempenaers
- Department of Behavioural Ecology and Evolutionary Genetics, Max Planck Institute for Ornithology, Seewiesen, 82319, Germany
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6
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Nagy G, Garamszegi LZ, Hegyi G, Herényi M, Laczi M, Rosivall B, Szöllősi E, Török J. Digit ratio predicts the number of lifetime recruits in female collared flycatchers. Biol Lett 2019; 15:20190051. [PMID: 30890071 DOI: 10.1098/rsbl.2019.0051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The early environment in which an organism grows can have long-lasting impacts on both its phenotype and fitness. However, assessing this environment comprehensively is a formidable task. The relative length of the second to the fourth digit (2D : 4D) is a broadly studied skeletal trait that is fixed for life during ontogeny. 2D : 4D has been shown to indicate various early effects including the perinatal steroid milieu in both humans and non-human animals. However, the fitness relevance of the early effects indicated by 2D : 4D remains unknown. Here, we investigated hindlimb 2D : 4D and measures of lifetime performance in wild collared flycatcher ( Ficedula albicollis) females. We found that females with higher 2D : 4D had a greater number of recruiting offspring to the breeding population. This was the case despite the fact that such females did not lay more eggs or breed more frequently during their reproductive life. Our results support the suggestion that 2D : 4D, known to be a retrospective marker of perinatal development, positively associates with female quality in the collared flycatcher.
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Affiliation(s)
- Gergely Nagy
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary
| | - László Zsolt Garamszegi
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary.,2 MTA-ELTE, Theoretical Biology and Evolutionary Ecology Research Group, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary.,3 Department of Evolutionary Ecology, Estación Biológica de Doñana-CSIC , c/Americo Vespucio, 26, 41092 Seville , Spain
| | - Gergely Hegyi
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary
| | - Márton Herényi
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary.,4 Department of Zoology and Animal Ecology, Szent István University , Páter Károly utca 1, Gödöllő H-2100 , Hungary
| | - Miklós Laczi
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary
| | - Balázs Rosivall
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary
| | - Eszter Szöllősi
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary
| | - János Török
- 1 Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary.,5 Ecology Research Group, Hungarian Academy of Sciences , Pázmány Péter sétány 1/C, Budapest H-1117 , Hungary
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7
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Ledecka D, Zeman M, Okuliarova M. Genetic variation in maternal yolk testosterone allocation predicts female mating decisions in Japanese quail. Anim Behav 2019. [DOI: 10.1016/j.anbehav.2019.08.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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8
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van den Brand H, van de Kraats SJF, Sözcü A, Jöerissen R, Heetkamp MJW, van den Anker I, Ooms M, Kemp B. Both the rooster line and incubation temperature affect embryonic metabolism and hatchling quality in laying hen crossbreds. Poult Sci 2019; 98:2632-2640. [PMID: 30690584 PMCID: PMC6527512 DOI: 10.3382/ps/pez007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 01/07/2019] [Indexed: 11/20/2022] Open
Abstract
Effects of 3 eggshell temperatures (EST; 36.7. 37.8, and 38.9°C) in 2 genetic laying hen crossbreds (AB and BB; same hen line, different rooster line) on embryonic metabolism and hatchling quality were investigated. EST were applied from day 14.5 of incubation (E14.5) until hatching. The experiment consisted of 6 consecutive batches with eggs weighing between 59 and 61 g. Heat production was determined continuously from E14.5 onward. In fresh eggs, yolk weight tended to be higher (Δ = 0.28 g; P = 0.08) in the AB crossbred than in the BB crossbred. At E14.5 and E18.5, yolk-free body mass (YFBM) and residual yolk (RY) weight did not differ between genetic crossbred and EST. Hatching time after the start of incubation was not affected by genetic crossbred, but was longer in the 36.7°C (517 h) than in the 38.9°C (505 h), with 37.8°C in between (506 h). At 6 h after hatching, no differences between crossbreds were found for chicken quality parameters, such as chicken weight, chicken length, RY, YFBM, and organ weights, but heart weight was higher in the 36.7°C EST than in the other 2 EST (Δ = 0.24 to 0.30% of YFBM, P = 0.005). Intestinal weight was higher at 36.7°C EST than at 38.9°C EST (Δ = 0.79% of YFBM; P = 0.02), with 37.8°C EST in between. Heat production between E14.5 and E18.5 was higher in the AB crossbred than in the BB crossbred (Δ = 2.61%, P < 0.001) and regardless of crossbred higher at an EST of 38.9°C than at other 2 EST (Δ = 3.59% on average; P < 0.001). Hatchling quality determined at pulling (E21.5) was not affected by EST, but AB chickens were lighter (Δ = 0.46 g; P = 0.03), had less red hocks (Δ = 0.03; P = 0.02), more red beaks (Δ = 0.10; P < 0.001), and a higher (worse) navel score (Δ = 0.11; P < 0.001) than BB chickens. It can be concluded that not only incubation temperature, but also the rooster line appears to play a role in layer crossbred embryo metabolism and hatchling quality.
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Affiliation(s)
- H van den Brand
- Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, 6700 AH, Wageningen, the Netherlands
| | - S J F van de Kraats
- Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, 6700 AH, Wageningen, the Netherlands
| | - A Sözcü
- Department of Animal Sciences, Uludag University, 16059, Bursa, Turkey
| | - R Jöerissen
- Hendrix Genetics, Boxmeer, 5831 CK, the Netherlands
| | - M J W Heetkamp
- Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, 6700 AH, Wageningen, the Netherlands
| | - I van den Anker
- Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, 6700 AH, Wageningen, the Netherlands
| | - M Ooms
- Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, 6700 AH, Wageningen, the Netherlands
| | - B Kemp
- Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, 6700 AH, Wageningen, the Netherlands
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9
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Langen EMA, Goerlich-Jansson VC, von Engelhardt N. Effects of the maternal and current social environment on female body mass and reproductive traits in Japanese quail ( Coturnix japonica). ACTA ACUST UNITED AC 2019; 222:jeb.187005. [PMID: 30679238 DOI: 10.1242/jeb.187005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 01/18/2019] [Indexed: 10/27/2022]
Abstract
The social environment of breeding females can affect their phenotype, with potential adaptive maternal effects on offspring that experience a similar environment. We housed Japanese quail (Coturnix japonica) females in two group sizes (pairs versus groups of four) and studied the effects on their offspring under matched and mismatched conditions. We measured F1 body mass, reproduction, and plasma levels of androgens and corticosterone. F1 group housing led to an increase in body mass. In addition, F1 group housing had a positive effect on mass in daughters of pair-housed P0 females only, which were heaviest under mismatched conditions. At the time of egg collection for the F2 generation, F1 group-housed females were heavier, irrespective of the P0 treatment. F1 females in groups laid heavier eggs, with higher hatching success, and produced heavier offspring, most likely a maternal effect of F1 mass. F1 plasma hormones were affected by neither the P0 nor the F1 social environment. These results contrasted with effects in the P0 generation (reported previously), in which plasma hormone levels, but not mass, differed between social environments. This may be due to changes in adult sex ratios as P0 females were housed with males, whereas F1 females encountered males only during mating. Our study demonstrates potentially relevant mismatch effects of the social environment on F1 body mass and maternal effects on F2 offspring, but further study is needed to understand their adaptive significance and physiological mechanisms.
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Affiliation(s)
- Esther M A Langen
- Department of Animal Behaviour, Bielefeld University, Morgenbreede 45, 33615 Bielefeld, Germany .,Department of Animals in Science and Society, Utrecht University, Yalelaan 2, 3508 TD Utrecht, The Netherlands
| | - Vivian C Goerlich-Jansson
- Department of Animal Behaviour, Bielefeld University, Morgenbreede 45, 33615 Bielefeld, Germany.,Department of Animals in Science and Society, Utrecht University, Yalelaan 2, 3508 TD Utrecht, The Netherlands
| | - Nikolaus von Engelhardt
- Department of Animal Behaviour, Bielefeld University, Morgenbreede 45, 33615 Bielefeld, Germany
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10
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Robart AR, Sinervo B. Females increase parental care, but not fecundity, when mated to high-quality males in a biparental fish. Anim Behav 2019. [DOI: 10.1016/j.anbehav.2018.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Torres R, Chin E, Rampton R, Williams TD. Are there synergistic or antagonistic effects of multiple maternally-derived egg components (antibodies and testosterone) on offspring phenotype? J Exp Biol 2019; 222:jeb.196956. [DOI: 10.1242/jeb.196956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 03/20/2019] [Indexed: 01/13/2023]
Abstract
Eggs are ‘multivariate’ in that they contain multiple maternally-derived egg components (e.g. hormones, antibodies, mRNA, antioxidants) which are thought to influence offspring phenotype. However, most studies have focused on single egg components and on short-term effects. Here, we simultaneously manipulated two egg components, maternally-derived antibodies (MAb) and yolk testosterone (T) to assess potential synergistic or antagonistic effects on offspring phenotype from hatching to sexual maturity. We found no evidence for short-or long-term effects of either MAb or yolk T alone, or their interaction, on hatching mass, size at fledging (tarsus), body mass at sexual maturity (day 82), chick survival, humoral immune function, or any measured female reproductive trait at sexual maturity. There was a positive effect of yolk T, but not MAb, on offspring PHA response at 26 days of age but at 82 days of age MAb, but not yolk T, had a positive effect on PHA response. There was also a MAb*sex interaction on 30 day chick mass, and a positive effect of yolk T on male courtship behaviour at sexual maturity. However, we found no evidence for synergy, i.e. where offspring treated both with MAb and yolk T had higher trait values than offspring treated with either MAb or yolk T alone for any measured trait. Similarly, evidence for antagonistic (compensatory) effects, where offspring treated both with MAb and yolk T had intermediate trait values compared with offspring treated with either MAb or yolk T alone, was equivocal.
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Affiliation(s)
- Roxana Torres
- Instituto de Ecologia, Universidad Nacional Autonoma de Mexico, A.P. 70-275, Mexico D.F., 04510, Mexico
| | - Eunice Chin
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 4H8, Canada
| | - Rowan Rampton
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 4H8, Canada
| | - Tony D Williams
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, V5A 4H8, Canada
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12
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Ratikainen II, Haaland TR, Wright J. Differential allocation of parental investment and the trade-off between size and number of offspring. Proc Biol Sci 2018; 285:20181074. [PMID: 30068679 PMCID: PMC6111174 DOI: 10.1098/rspb.2018.1074] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/09/2018] [Indexed: 02/06/2023] Open
Abstract
When parents decide how much to invest in current versus future offspring and how many offspring to divide their current investments between, the optimal decision can be affected by the quality of their partner. This differential allocation (DA) is highly dependent on exactly how partner quality affects reproductive costs and offspring benefits. We present a stochastic dynamic model of DA in which females care for a series of clutches when mated with males of different quality. In each reproductive event, females choose the size and number of offspring. We find that if partner quality affects reproductive costs, then DA in total reproductive investment occurs only via changes in the number of offspring. DA in the optimal size of the offspring occurs only if partner quality affects the offspring benefit function. This is mostly in the form of greater female investment per offspring as male quality decreases. Simultaneously, we find that adaptive DA increases the number of offspring, and thus the amount of total investment, as male quality increases. Only certain model scenarios produce the positive DA in offspring size seen in empirical studies, providing a predictive framework for DA and how partner quality affects reproductive costs and offspring benefits.
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Affiliation(s)
- Irja Ida Ratikainen
- Department of Biology, Centre for Biodiversity Dynamics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491 Trondheim, Norway
| | - Thomas Ray Haaland
- Department of Biology, Centre for Biodiversity Dynamics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491 Trondheim, Norway
| | - Jonathan Wright
- Department of Biology, Centre for Biodiversity Dynamics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491 Trondheim, Norway
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13
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Podmokła E, Drobniak SM, Rutkowska J. Chicken or egg? Outcomes of experimental manipulations of maternally transmitted hormones depend on administration method - a meta-analysis. Biol Rev Camb Philos Soc 2018; 93:1499-1517. [PMID: 29573376 DOI: 10.1111/brv.12406] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 01/28/2018] [Accepted: 02/13/2018] [Indexed: 12/25/2022]
Abstract
Steroid hormones are important mediators of prenatal maternal effects in animals. Despite a growing number of studies involving experimental manipulation of these hormones, little is known about the impact of methodological differences among experiments on the final results expressed as offspring traits. Using a meta-analytical approach and a representative sample of experimental studies performed on birds, we tested the effect of two types of direct hormonal manipulations: manipulation of females (either by implantation of hormone pellets or injection of hormonal solutions) and manipulation of eggs by injection. In both types of manipulation we looked at the effects of two groups of hormones: corticosterone and androgens in the form of testosterone and androstenedione. We found that the average effect on offspring traits differed between the manipulation types, with a well-supported positive effect of egg manipulation and lack of a significant effect of maternal manipulation. The observed average positive effect for egg manipulation was driven mainly by androgen manipulations, while corticosterone manipulations exerted no overall effect, regardless of manipulation type. Detailed analyses revealed effects of varying size and direction depending on the specific offspring traits; e.g., egg manipulation positively affected physiology and behaviour (androgens), and negatively affected future reproduction (corticosterone). Effect size was negatively related to the dose of androgen injected into the eggs, but unrelated to timing of manipulation, offspring developmental stage at the time of measuring their traits, solvent type, the site of egg injection and maternal hormone delivery method. Despite the generally acknowledged importance of maternal hormones for offspring development in birds, the overall effect of their experimental elevation is rather weak, significantly heterogeneous and dependent on the hormone and type of manipulation. We conclude by providing general recommendations as to how hormonal manipulations should be performed in order to standardize their impact and the results achieved. We also emphasize the need for research on free-living birds with a focus on fitness-related and other long-term effects of maternal hormones.
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Affiliation(s)
- Edyta Podmokła
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland
| | - Szymon M Drobniak
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland
| | - Joanna Rutkowska
- Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387, Kraków, Poland
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14
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Haaland TR, Wright J, Kuijper B, Ratikainen II. Differential Allocation Revisited: When Should Mate Quality Affect Parental Investment? Am Nat 2017; 190:534-546. [DOI: 10.1086/693484] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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15
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Sato A, Karino K. Evidence for Strategic Sex Allocation in the Guppy ( Poecilia reticulata): Brood Sex Ratio and Size Predict Subsequent Adult Male Mating Success. Ethology 2017. [DOI: 10.1111/eth.12591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Aya Sato
- Faculty of Education; Gunma University; Maebashi Gunma Japan
| | - Kenji Karino
- Department of Biology; Tokyo Gakugei University; Koganei Tokyo Japan
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16
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Hsu BY, Dijkstra C, Groothuis TG. No escape from mother's will: effects of maternal testosterone on offspring reproductive behaviour far into adulthood. Anim Behav 2016. [DOI: 10.1016/j.anbehav.2016.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Arnold KE, Gilbert L, Gorman HE, Griffiths KJ, Adam A, Nager RG. Paternal attractiveness and the effects of differential allocation of parental investment. Anim Behav 2016. [DOI: 10.1016/j.anbehav.2015.12.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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18
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Paul SC, Pell JK, Blount JD. Reproduction in Risky Environments: The Role of Invasive Egg Predators in Ladybird Laying Strategies. PLoS One 2015; 10:e0139404. [PMID: 26488753 PMCID: PMC4619405 DOI: 10.1371/journal.pone.0139404] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 09/12/2015] [Indexed: 12/04/2022] Open
Abstract
Reproductive environments are variable and the resources available for reproduction are finite. If reliable cues about the environment exist, mothers can alter offspring phenotype in a way that increases both offspring and maternal fitness (‘anticipatory maternal effects’—AMEs). Strategic use of AMEs is likely to be important in chemically defended species, where the risk of offspring predation may be modulated by maternal investment in offspring toxin level, albeit at some cost to mothers. Whether mothers adjust offspring toxin levels in response to variation in predation risk is, however, unknown, but is likely to be important when assessing the response of chemically defended species to the recent and pervasive changes in the global predator landscape, driven by the spread of invasive species. Using the chemically defended two-spot ladybird, Adalia bipunctata, we investigated reproductive investment, including egg toxin level, under conditions that varied in the degree of simulated offspring predation risk from larval harlequin ladybirds, Harmonia axyridis. H. axyridis is a highly voracious alien invasive species in the UK and a significant intraguild predator of A. bipunctata. Females laid fewer, larger egg clusters, under conditions of simulated predation risk (P+) than when predator cues were absent (P-), but there was no difference in toxin level between the two treatments. Among P- females, when mean cluster size increased there were concomitant increases in both the mass and toxin concentration of eggs, however when P+ females increased cluster size there was no corresponding increase in egg toxin level. We conclude that, in the face of offspring predation risk, females either withheld toxins or were physiologically constrained, leading to a trade-off between cluster size and egg toxin level. Our results provide the first demonstration that the risk of offspring predation by a novel invasive predator can influence maternal investment in toxins within their offspring.
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Affiliation(s)
- Sarah C. Paul
- Centre for Ecology & Conservation, College of Life & Environmental Sciences, University of Exeter, Penryn Campus, Cornwall, United Kingdom
| | - Judith K. Pell
- J. K. Pell Consulting, Luton, Bedfordshire, United Kingdom
| | - Jonathan D. Blount
- Centre for Ecology & Conservation, College of Life & Environmental Sciences, University of Exeter, Penryn Campus, Cornwall, United Kingdom
- * E-mail:
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19
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Marshall DJ. Environmentally induced (co)variance in sperm and offspring phenotypes as a source of epigenetic effects. ACTA ACUST UNITED AC 2015; 218:107-13. [PMID: 25568457 DOI: 10.1242/jeb.106427] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Traditionally, it has been assumed that sperm are a vehicle for genes and nothing more. As such, the only source of variance in offspring phenotype via the paternal line has been genetic effects. More recently, however, it has been shown that the phenotype or environment of fathers can affect the phenotype of offspring, challenging traditional theory with implications for evolution, ecology and human in vitro fertilisation. Here, I review sources of non-genetic variation in the sperm phenotype and evidence for co-variation between sperm and offspring phenotypes. I distinguish between two environmental sources of variation in sperm phenotype: the pre-release environment and the post-release environment. Pre-release, sperm phenotypes can vary within species according to male phenotype (e.g. body size) and according to local conditions such as the threat of sperm competition. Post-release, the physicochemical conditions that sperm experience, either when freely spawned or when released into the female reproductive tract, can further filter or modify sperm phenotypes. I find evidence that both pre- and post-release sperm environments can affect offspring phenotype; fertilisation is not a new beginning – rather, the experiences of sperm with the father and upon release can drive variation in the phenotype of the offspring. Interestingly, there was some evidence for co-variation between the stress resistance of sperm and the stress resistance of offspring, though more studies are needed to determine whether such effects are widespread. Overall, it appears that environmentally induced covariation between sperm and offspring phenotypes is non-negligible and further work is needed to determine their prevalence and strength.
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Affiliation(s)
- Dustin J Marshall
- School of Biological Sciences, Monash University, VIC 3800, Australia
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20
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Muriel J, Salmón P, Nunez-Buiza A, de Salas F, Pérez-Rodríguez L, Puerta M, Gil D. Context-dependent effects of yolk androgens on nestling growth and immune function in a multibrooded passerine. J Evol Biol 2015; 28:1476-88. [PMID: 26079258 DOI: 10.1111/jeb.12668] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 06/08/2015] [Indexed: 01/08/2023]
Abstract
Female birds may adjust their offspring phenotype to the specific requirements of the environment by differential allocation of physiologically active substances into yolks, such as androgens. Yolk androgens have been shown to accelerate embryonic development, growth rate and competitive ability of nestlings, but they can also entail immunological costs. The balance between costs and benefits of androgen allocation is expected to depend on nestling environment. We tested this hypothesis in a multibrooded passerine, the spotless starling, Sturnus unicolor. We experimentally manipulated yolk androgen levels using a between-brood design and evaluated its effects on nestling development, survival and immune function. Both in first and replacement broods, the embryonic development period was shorter for androgen-treated chicks than controls, but there were no differences in second broods. In replacement broods, androgen-treated chicks were heavier and larger than those hatched from control eggs, but this effect was not observed in the other breeding attempts. Androgen exposure reduced survival with respect to controls only in second broods. Regarding immune function, we detected nonsignificant trends for androgen treatment to activate two important components of innate and adaptive immunity (IL-6 and Ig-A levels, respectively). Similarly, androgen-treated chicks showed greater lymphocyte proliferation than controls in the first brood and an opposite trend in the second brood. Our results indicate that yolk androgen effects on nestling development and immunity depend on the environmental conditions of each breeding attempt. Variation in maternal androgen allocation to eggs could be explained as the result of context-dependent optimal strategies to maximize offspring fitness.
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Affiliation(s)
- J Muriel
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), Madrid, Spain
| | - P Salmón
- Department of Biology, Evolutionary Ecology Unit, Lund University, Lund, Sweden
| | - A Nunez-Buiza
- Departamento de Fisiología Animal II, Facultad de Ciencias Biológicas, Universidad Complutense, Madrid, Spain
| | - F de Salas
- Departamento de Fisiología Animal II, Facultad de Ciencias Biológicas, Universidad Complutense, Madrid, Spain
| | - L Pérez-Rodríguez
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), Madrid, Spain.,Departamento de Ecología Evolutiva, Estación Biológica de Doñana (EBD-CSIC), Sevilla, Spain
| | - M Puerta
- Departamento de Fisiología Animal II, Facultad de Ciencias Biológicas, Universidad Complutense, Madrid, Spain
| | - D Gil
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), Madrid, Spain
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21
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Dehnhard N, Eens M, Demongin L, Quillfeldt P, Poisbleau M. Individual consistency and phenotypic plasticity in rockhopper penguins: female but not male body mass links environmental conditions to reproductive investment. PLoS One 2015; 10:e0128776. [PMID: 26030824 PMCID: PMC4452512 DOI: 10.1371/journal.pone.0128776] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 04/30/2015] [Indexed: 12/21/2022] Open
Abstract
In marine habitats, increasing ocean temperatures due to global climate change may distinctly reduce nutrient and consequently food availability for seabirds. Food availability is a known driver of body mass and reproductive investment in birds, but these traits may also depend on individual effects. Penguins show extreme intra-annual body mass variation and rely on accumulated body reserves for successful breeding. However, no study so far has tested individual consistency and phenotypic responses in body mass and reproductive investment in this taxon. Using a unique dataset on individually marked female and male southern rockhopper penguins (Eudyptes chrysocome chrysocome) across six years, we investigated 1) the individual consistency in body mass (measured at egg laying), body condition and reproductive investment across years, subsequently 2) identified the best-explanatory temperature-related environmental variables for female and male body mass, and 3) tested the effect of female and male body mass on reproductive investment. Body mass, body condition and reproductive investment were all highly repeatable. As body condition should control for the structural size of the birds, the similarly high repeatability estimates for body mass and body condition suggested that the consistent between-individual body mass differences were independent of structural size. This supported the use of body mass for the subsequent analyses. Body mass was higher under colder environmental conditions (positive Southern Annular Mode), but the overall phenotypic response appeared limited. Reproductive investment increased with female but not male body mass. While environmental effects on body mass in our study period were rather small, one can expect that ongoing global climate change will lead to a deterioration of food availability and we might therefore in the long-term expect a phenotypical decline in body mass and reproductive investment.
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Affiliation(s)
- Nina Dehnhard
- University of Antwerp, Department Biology—Ethology, Campus Drie Eiken, Universiteitsplein 1, Antwerp (Wilrijk), Belgium
- Max Planck Institute for Ornithology, Department of Migration and Immuno-Ecology, Am Obstberg 1, Radolfzell, Germany
- University of Konstanz, Department of Biology, Konstanz, Germany
| | - Marcel Eens
- University of Antwerp, Department Biology—Ethology, Campus Drie Eiken, Universiteitsplein 1, Antwerp (Wilrijk), Belgium
| | - Laurent Demongin
- University of Antwerp, Department Biology—Ethology, Campus Drie Eiken, Universiteitsplein 1, Antwerp (Wilrijk), Belgium
- Max Planck Institute for Ornithology, Department of Migration and Immuno-Ecology, Am Obstberg 1, Radolfzell, Germany
- University of Konstanz, Department of Biology, Konstanz, Germany
| | - Petra Quillfeldt
- Max Planck Institute for Ornithology, Department of Migration and Immuno-Ecology, Am Obstberg 1, Radolfzell, Germany
- University of Konstanz, Department of Biology, Konstanz, Germany
- Justus-Liebig University Gießen, Department of Animal Ecology & Systematics, Heinrich-Buff-Ring 38, Gießen, Germany
| | - Maud Poisbleau
- University of Antwerp, Department Biology—Ethology, Campus Drie Eiken, Universiteitsplein 1, Antwerp (Wilrijk), Belgium
- Max Planck Institute for Ornithology, Department of Migration and Immuno-Ecology, Am Obstberg 1, Radolfzell, Germany
- University of Konstanz, Department of Biology, Konstanz, Germany
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22
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Muriel J, Pérez-Rodríguez L, Puerta M, Gil D. Diverse dose-response effects of yolk androgens on embryo development and nestling growth in a wild passerine. ACTA ACUST UNITED AC 2015; 218:2241-9. [PMID: 25987739 DOI: 10.1242/jeb.118257] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 05/06/2015] [Indexed: 11/20/2022]
Abstract
Avian egg yolks contain various amounts of maternally derived androgens that can modify offspring phenotype and adjust their development to the post-hatching environment. Seemingly adaptive variation in yolk androgen levels with respect to breeding density conditions or male attractiveness has been found in numerous studies. One important consideration that has been overlooked in previous research is the likely non-linear nature of hormone effects. To examine possible complex dose-response effects of maternal androgens on chick development, we experimentally administered three different androgen doses of the naturally occurring mixture of yolk testosterone and androstenedione to spotless starling eggs (Sturnus unicolor). We found that yolk androgens induce a non-linear dose-response pattern in several traits. Androgens had a stimulatory effect on hatchling body mass and nestling skeletal growth, but maximum values were found at intermediate doses, whereas our highest dose resulted in a decrease. However, the opposite U-shaped effect was found on nestling body mass. We also detected linear negative and positive effects on embryonic development period and nestling gape width, respectively. Our results suggest differential tissue responsiveness to yolk androgens, which may result in compromises in maternal allocation to produce adapted phenotypes. Because of the non-linear dose-response pattern, future investigations should carefully consider a wide range of concentrations, as the balance of costs and benefits may strongly differ depending on concentration.
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Affiliation(s)
- Jaime Muriel
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), José Gutiérrez Abascal 2, Madrid E-28006, Spain
| | - Lorenzo Pérez-Rodríguez
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), José Gutiérrez Abascal 2, Madrid E-28006, Spain Departamento de Ecología Evolutiva, Estación Biológica de Doñana (EBD-CSIC), Avda. Américo Vespucio, s/n, Isla de la Cartuja, Sevilla 41092, Spain
| | - Marisa Puerta
- Departamento de Fisiología Animal II, Facultad de Ciencias Biológicas, Universidad Complutense, José Antonio Novais, 2 Ciudad Universitaria, Madrid 28040, Spain
| | - Diego Gil
- Departamento de Ecología Evolutiva, Museo Nacional de Ciencias Naturales (MNCN-CSIC), José Gutiérrez Abascal 2, Madrid E-28006, Spain
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23
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Saino N, Romano M, Rubolini D, Caprioli M, Costanzo A, Canova L, Moller AP. Melanic coloration differentially predicts transfer of immune factors to eggs with daughters or sons. Behav Ecol 2014. [DOI: 10.1093/beheco/aru112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Vergauwen J, Eens M, Müller W. Consequences of experimentally elevated yolk testosterone levels for intra- and inter-sexual selection in canaries. Behav Ecol Sociobiol 2014. [DOI: 10.1007/s00265-014-1740-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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25
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Krištofík J, Darolová A, Majtan J, Okuliarová M, Zeman M, Hoi H. Do females invest more into eggs when males sing more attractively? Postmating sexual selection strategies in a monogamous reed passerine. Ecol Evol 2014; 4:1328-39. [PMID: 24834329 PMCID: PMC4020692 DOI: 10.1002/ece3.1034] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 02/18/2014] [Accepted: 02/19/2014] [Indexed: 12/02/2022] Open
Abstract
Maternal investment can play an important role for offspring fitness, especially in birds, as females have to provide their eggs with all the necessary nutrients for the development of the embryo. It is known that this type of maternal investment can be influenced by the quality of the male partner. In this study, we first verify that male song is important in the mate choice of female Eurasian reed warblers, as males mate faster when their singing is more complex. Furthermore, female egg investment varies in relation to male song characteristics. Interestingly, clutch size, egg weight, or size, which can be considered as an high-cost investment, is not influenced by male song characteristics, whereas comparably low-cost investment types like investment into diverse egg components are adjusted to male song characteristics. In line with this, our results suggest that female allocation rules depend on investment type as well as song characteristics. For example, egg white lysozyme is positively correlated with male song complexity. In contrast, a negative correlation exists between-song speed and syllable repetitiveness and egg yolk weight as well as egg yolk testosterone concentration. Thus, our results suggest that female egg investment is related to male song performance in several aspects, but female investment patterns regarding various egg compounds are not simply correlated.
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Affiliation(s)
- Ján Krištofík
- Institute of Zoology, Slovak Academy of SciencesDúbravská cesta 9, Bratislava, 84506, Slovakia
| | - Alžbeta Darolová
- Institute of Zoology, Slovak Academy of SciencesDúbravská cesta 9, Bratislava, 84506, Slovakia
| | - Juraj Majtan
- Institute of Zoology, Slovak Academy of SciencesDúbravská cesta 9, Bratislava, 84506, Slovakia
- Department of Microbiology, Faculty of Medicine, Slovak Medical UniversityLimbová 12, 833 03, Bratislava, Slovakia
| | - Monika Okuliarová
- Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius UniversityMlynská dolina, 842 15, Bratislava, Slovak Republic
| | - Michal Zeman
- Department of Animal Physiology and Ethology, Faculty of Natural Sciences, Comenius UniversityMlynská dolina, 842 15, Bratislava, Slovak Republic
| | - Herbert Hoi
- Department of Integrative Biology and Evolution, Konrad Lorenz Institute of Ethology, University of Veterinary Medicine ViennaSavoyenstr. 1a, Vienna, A – 1160, Austria
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26
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Marie-Orleach L, Roussel JM, Bugeon J, Tremblay J, Ombredane D, Evanno G. Melanin-based coloration of sneaker male Atlantic salmon is linked to viability and emergence timing of their offspring. Biol J Linn Soc Lond 2013. [DOI: 10.1111/bij.12187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lucas Marie-Orleach
- INRA; UMR985 Écologie et Santé des Écosystèmes ESE 35042 Rennes France
- Agrocampus Ouest; UMR ESE 65 rue de Saint-Brieuc 35042 Rennes France
- Evolutionary Biology; Zoological Institute; University of Basel; Vesalgasse 1 4051 Basel Switzerland
| | - Jean-Marc Roussel
- INRA; UMR985 Écologie et Santé des Écosystèmes ESE 35042 Rennes France
- Agrocampus Ouest; UMR ESE 65 rue de Saint-Brieuc 35042 Rennes France
| | - Jérôme Bugeon
- INRA; UR1037 Fish Physiology and Genomics; 35000 Rennes France
| | - Julien Tremblay
- INRA; Unité Expérimentale d'Écologie et d'Écotoxicologie Aquatique; 35042 Rennes France
| | - Dominique Ombredane
- INRA; UMR985 Écologie et Santé des Écosystèmes ESE 35042 Rennes France
- Agrocampus Ouest; UMR ESE 65 rue de Saint-Brieuc 35042 Rennes France
| | - Guillaume Evanno
- INRA; UMR985 Écologie et Santé des Écosystèmes ESE 35042 Rennes France
- Agrocampus Ouest; UMR ESE 65 rue de Saint-Brieuc 35042 Rennes France
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27
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Poisbleau M, Dehnhard N, Demongin L, Parenteau C, Quillfeldt P, Eens M. Females paired with new and heavy mates reduce intra-clutch differences in resource allocation. PLoS One 2013; 8:e72136. [PMID: 23967280 PMCID: PMC3744535 DOI: 10.1371/journal.pone.0072136] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 07/05/2013] [Indexed: 11/19/2022] Open
Abstract
Reproductive investment affects both offspring and parental fitness and influences the evolution of life histories. Females may vary their overall primary reproductive effort in relation to the phenotypic characteristics of their mate. However, the effects of male quality on differential resource allocation within clutches have been largely neglected despite the potential implications for mate choice and population dynamics, especially in species exhibiting biparental care and brood reduction. Female southern rockhopper penguins Eudyptes chrysocome paired with heavy mates reduced intra-clutch variation in egg and albumen masses. Females paired with new mates also reduced intra-clutch variation in yolk androgen levels. Since both an increased mass and increased androgen concentrations positively influence chick survival under sibling competition, the chances of fledging the whole clutch are likely to be higher for newly formed pairs with heavy males than for previously formed pairs with light males. Interestingly, total clutch provisioning did not vary with male quality. We show for the first time that females vary intra-clutch variation in resource allocation according to male quality. In species with brood reduction, it may be more adaptive for females to modulate the distribution of resources within the clutch according to breeding conditions, than to change their total clutch provisioning.
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Affiliation(s)
- Maud Poisbleau
- Department of Biology - Ethology, University of Antwerp, Wilrijk, Belgium.
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28
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Experience affects mating behavior, but does not impact parental reproductive allocation in a lizard. Behav Ecol Sociobiol 2013. [DOI: 10.1007/s00265-013-1523-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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29
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Increased exposure to yolk testosterone has feminizing effects in chickens, Gallus gallus domesticus. Anim Behav 2013. [DOI: 10.1016/j.anbehav.2013.01.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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30
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Schweitzer C, Goldstein MH, Place NJ, Adkins-Regan E. Long-lasting and sex-specific consequences of elevated egg yolk testosterone for social behavior in Japanese quail. Horm Behav 2013; 63:80-7. [PMID: 23123143 DOI: 10.1016/j.yhbeh.2012.10.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 10/12/2012] [Accepted: 10/23/2012] [Indexed: 11/16/2022]
Abstract
In birds, early exposure to steroid hormones deposited in egg yolks is hypothesized to result in long-lasting effects on brain and behavior. However, the long-term effects of maternal androgens on the development of social behavior, and whether these could interfere with the effects of the endogenous gonadal hormones that mediate sexual differentiation, remain poorly known. To answer these questions, we enhanced yolk testosterone by injecting testosterone (T) in oil into Japanese quail (Coturnix japonica) eggs prior to incubation. Vehicle-injected (V) eggs served as controls. From age 3 weeks to 8 weeks, sexual development was measured using morphological and physiological traits, and social behavior was measured, including male-typical sexual behavior. In females, treatment with testosterone boosted growth. Males from T-injected eggs developed an affiliative preference for familiar females and differed from V-injected males in the acoustic features of their crows, whereas sexual interest (looking behavior) and copulatory behavior were not affected. These long-lasting and sex-specific yolk testosterone effects on the development of dimorphic traits, but without disrupting sexual differentiation of reproductive behavior suggest potential organizational effects of maternal testosterone, but acting through separate processes than the endocrine mechanisms previously shown to control sexual differentiation. Separate processes could reflect the action of androgens at different times or on multiple targets that are differentially sensitive to steroids or develop at different rates.
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Affiliation(s)
- Cécile Schweitzer
- Department of Psychology, Cornell University, Ithaca, NY 14853, USA.
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31
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Guibert F, Lumineau S, Kotrschal K, Möstl E, Richard-Yris MA, Houdelier C. Trans-generational effects of prenatal stress in quail. Proc Biol Sci 2012; 280:20122368. [PMID: 23256192 DOI: 10.1098/rspb.2012.2368] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The prenatal environment is a source of phenotypic variability influencing the animal's characteristics. Prenatal stress affects not only the development of offspring, but also that of the following generation. Such effects have been best documented in mammals but can also be observed in birds, suggesting common processes across phylogenetic orders. We found previously that Japanese quail females stressed during laying produced offspring with higher fearfulness, probably related to modulation of testosterone levels in their eggs. Here, we evaluated long-term effects of prenatal stress by analysing reproductive traits of these F(1) offspring and, then, the development of their subsequent (F(2)) offspring. The sexual behaviour of F(1) prenatally stressed (F1PS) males was impaired. F1PS females' eggs contained less yolk and more albumen, and higher yolk testosterone and progesterone levels than did F(1) prenatal control females. The fearfulness of F(2) prenatally stressed quail was greater than that of F(2) prenatal control quail. These F(2) behavioural differences paralleled those evidenced by their parents, suggesting trans-generational transmission of prenatal stress effects, probably mediated by egg compositions of F1PS females.
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Affiliation(s)
- Floriane Guibert
- UMR-CNRS 6552 Ethologie animale et humaine, Université de Rennes 1, Rennes, France
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Marteinson SC, Bird DM, Letcher RJ, Sullivan KM, Ritchie IJ, Fernie KJ. Dietary exposure to technical hexabromocyclododecane (HBCD) alters courtship, incubation and parental behaviors in American kestrels (Falco sparverius). CHEMOSPHERE 2012; 89:1077-1083. [PMID: 22743184 DOI: 10.1016/j.chemosphere.2012.05.073] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 05/09/2012] [Accepted: 05/16/2012] [Indexed: 06/01/2023]
Abstract
Hexabromocyclododecane (HBCD) is a high production volume brominated flame retardant that has been detected in the environment and wildlife at increasing concentrations. This study was designed to determine potential effects of dietary exposure to environmentally relevant levels of HBCD on behavior during reproduction in captive American kestrels. Twenty kestrel pairs were exposed to 0.51 μg technical HBCD g(-1) kestrel d(-1) from 4 weeks prior to pairing until chicks hatched (~75 d). Ten pairs of controls received the safflower oil vehicle only and were used for comparison. During the courtship period the chitter-calls were reduced in both sexes (p=0.038) and females performed fewer bonding displays (p=0.053). Both sexes showed a propensity to be less active than controls during courtship. The reduction in male courtship behavior was correlated with reduced courtship behaviors of females (p=0.008) as well as reduced egg mass (p=0.019). During incubation, nest temperatures of treatment pairs were lower at mid-incubation (p=0.038). HBCD-exposed males performed fewer key parental behaviors when rearing nestlings, including entering the nest-box, pair-bonding displays and food-retrievals. HBCD-exposed females appeared to compensate for the reduced parental behavior of their mates by performing these same behaviors more frequently than controls (p=0.004, p=0.027, p=0.025, respectively). This study demonstrates that HBCD affects breeding behavior in American kestrels throughout the reproductive season and behavioral alterations were linked to reproductive changes (egg size). This is the first study to report HBCD effects on reproductive behavior in any animal model.
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Affiliation(s)
- Sarah C Marteinson
- Avian Science and Conservation Centre, McGill University, 21-111 Lakeshore Road, Ste-Anne-de-Bellevue, Quebec, Canada H9X 3V9
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Ruuskanen S, Doligez B, Gustafsson L, Laaksonen T. Long-term effects of yolk androgens on phenotype and parental feeding behavior in a wild passerine. Behav Ecol Sociobiol 2012. [DOI: 10.1007/s00265-012-1373-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Grana SC, Sakaluk SK, Bowden RM, Doellman MA, Vogel LA, Thompson CF. Reproductive allocation in female house wrens is not influenced by experimentally altered male attractiveness. Behav Ecol Sociobiol 2012. [DOI: 10.1007/s00265-012-1378-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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35
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Ruuskanen S, Doligez B, Pitala N, Gustafsson L, Laaksonen T. Long-term fitness consequences of high yolk androgen levels: sons pay the costs. Funct Ecol 2012. [DOI: 10.1111/j.1365-2435.2012.01994.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Cucco M, Grenna M, Pellegrino I, Malacarne G. Egg-sequence rather than mating preference influences female egg investment in the red-legged partridge. ETHOL ECOL EVOL 2011. [DOI: 10.1080/03949370.2011.584565] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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GnRH--a missing link between testosterone concentrations in yolk and plasma and its intergenerational effects. PLoS One 2011; 6:e22675. [PMID: 21829476 PMCID: PMC3145665 DOI: 10.1371/journal.pone.0022675] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 06/30/2011] [Indexed: 12/02/2022] Open
Abstract
Despite the strong interest in hormone-mediated maternal effects two key questions concerning their mechanisms are as yet unanswered: First, whether the deposition of hormones in the egg yolk is coupled with the levels of these hormones in the maternal circulation, and second, whether epigenetic changes as induced by embryonic exposure to maternal yolk hormones impinge on yolk hormone deposition at adulthood. We investigated the responsiveness to gonadotropin-releasing hormone (GnRH) in female canaries whose embryonic exposure to yolk testosterone had been manipulated. This enabled us to study to what extent GnRH interlinks testosterone concentrations in female circulation and egg yolk as well as the intergenerational potential of hormone-mediated maternal effects. As expected, canary females responded to GnRH with a rise in plasma testosterone. The GnRH-responsiveness was positively correlated with the yolk testosterone content. Factors stimulating the release of GnRH will, therefore, lead to an increase of testosterone in both plasma and egg, posing a potential constraint on the yolk hormone deposition due to testosterone related trade-offs within the laying female. Exposure to elevated yolk testosterone levels as embryo reduced the GnRH-responsiveness in adulthood, potentially limiting environmental influences on yolk testosterone deposition, but the concentrations of yolk testosterone itself were not affected.
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Gilbert L, Williamson KA, Graves JA. Male attractiveness regulates daughter fecundity non-genetically via maternal investment. Proc Biol Sci 2011; 279:523-8. [PMID: 21733898 DOI: 10.1098/rspb.2011.0962] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Mothers can non-genetically influence offspring phenotype in response to environmental conditions, including mate attractiveness. If such 'maternal effects' influence the offspring's reproduction and F2 generation, there is a mechanism for non-genetic trans-generational effects on phenotype, including epigenetic phenomena, with implications for evolution and population dynamics. We demonstrate in the zebra finch Taeniopygia guttata such non-genetic effects on offspring fecundity and the size of early stage F2 (eggs) in response to experimentally manipulated father's attractiveness. Our experimental design allowed us to deduce that the mechanism for this non-genetic paternal effect was via maternal investment in eggs. This affected female offspring size and, consequently, fecundity and F2 (egg) size. This demonstrates that female perception of mate attractiveness can have non-genetic, trans-generational fitness consequences and this may have important implications for the evolution of sexually selected traits and population dynamics.
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Affiliation(s)
- Lucy Gilbert
- School of Biology, St Andrews University, Harold Mitchell Building, Fife KY16 9TH, UK.
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Bleu J, Le Galliard JF, Meylan S, Massot M, Fitze PS. Mating does not influence reproductive investment, in a viviparous lizard. ACTA ACUST UNITED AC 2011; 315:458-64. [PMID: 21732546 DOI: 10.1002/jez.693] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 05/19/2011] [Accepted: 05/23/2011] [Indexed: 11/06/2022]
Abstract
Mating is crucial for females that reproduce exclusively sexually and should influence their investment into reproduction. Although reproductive adjustments in response to mate quality have been tested in a wide range of species, the effect of exposure to males and mating per se has seldom been studied. Compensatory mechanisms against the absence of mating may evolve more frequently in viviparous females, which pay higher direct costs of reproduction, due to gestation, than oviparous females. To test the existence of such mechanisms in a viviparous species, we experimentally manipulated the mating opportunity of viviparous female lizard, Lacerta (Zootoca) vivipara. We assessed the effect of mating on ovulation, postpartum body condition and parturition date, as well as on changes in locomotor performances and body temperatures during the breeding cycle. Female lizards ovulated spontaneously and mating had no influence on litter size, locomotor impairment or on selected body temperature. However, offspring production induced a more pronounced locomotor impairment and physical burden than the production of undeveloped eggs. Postpartum body condition and parturition dates were not different among females. This result suggests that gestation length is not determined by an embryonic signal. In the common lizard, viviparity is not associated with facultative ovulation and a control of litter size after ovulation, in response to the absence of mating.
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Affiliation(s)
- Josefa Bleu
- CNRS, UPMC, ENS-UMR 7625, Laboratoire Ecologie et Evolution, Paris, France.
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Bonisoli-Alquati A, Matteo A, Ambrosini R, Rubolini D, Romano M, Caprioli M, Dessì-Fulgheri F, Baratti M, Saino N. Effects of egg testosterone on female mate choice and male sexual behavior in the pheasant. Horm Behav 2011; 59:75-82. [PMID: 21029735 DOI: 10.1016/j.yhbeh.2010.10.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 10/14/2010] [Accepted: 10/18/2010] [Indexed: 11/29/2022]
Abstract
Evidence is accumulating that sex steroids in the eggs, besides affecting progeny phenotype and behavior in the short term, also have enduring effects until adulthood, when they may translate into differences in reproductive strategies and success. Maternal steroids transfer may therefore affect both agonistic behavior and mate choice decisions, either through the promotion of body size and condition or through a priming effect on the neuroendocrine system. However, owing to the prevalence of a short-term perspective, relevance of maternal transfer of sex steroids to sexual selection processes has been seldom studied. Here we investigate the effects of an experimental increase in egg testosterone on male dominance and copulation success in the ring-necked pheasant, Phasianus colchicus, a polygynous galliform with multiple male ornamental traits, in captivity. We found that females from testosterone (T) injected eggs copulated less than control females. Males from T-injected eggs obtained more copulations than control males, specifically with control females. The effect of male 'ordinary' and secondary sexual traits on either dominance or copulation frequency did not depend on early exposure to T, nor did T treatment affect male dominance. Present results demonstrate that variation in the early hormonal environment set up by mothers affects sexual behavior of the offspring, which might translate into fitness differences.
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Affiliation(s)
- Andrea Bonisoli-Alquati
- Dipartimento di Biologia, Università degli Studi di Milano, via Celoria 26, I-20133 Milan, Italy.
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Pischedda A, Stewart AD, Little MK, Rice WR. Male genotype influences female reproductive investment in Drosophila melanogaster. Proc Biol Sci 2010; 278:2165-72. [PMID: 21159677 DOI: 10.1098/rspb.2010.2272] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In many species, males can influence the amount of resources their mates invest in reproduction. Two favoured hypotheses for this observation are that females assess male quality during courtship or copulation and alter their investment in offspring accordingly, or that males manipulate females to invest heavily in offspring produced soon after mating. Here, we examined whether there is genetic variation for males to influence female short-term reproductive investment in Drosophila melanogaster, a species with strong sexual selection and substantial sexual conflict. We measured the fecundity and egg size of females mated to males from multiple isofemale lines collected from populations around the globe. Although these traits were not strongly influenced by the male's population of origin, we found that 22 per cent of the variation in female short-term reproductive investment was attributable to the genotype of her mate. This is the first direct evidence that male D. melanogaster vary genetically in their proximate influence on female fecundity, egg size and overall reproductive investment.
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Affiliation(s)
- Alison Pischedda
- Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA 93106-9620, USA.
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Marteinson SC, Bird DM, Shutt JL, Letcher RJ, Ritchie IJ, Fernie KJ. Multi-generational effects of polybrominated diphenylethers exposure: embryonic exposure of male American kestrels (Falco sparverius) to DE-71 alters reproductive success and behaviors. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2010; 29:1740-1747. [PMID: 20821627 DOI: 10.1002/etc.200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Polybrominated diphenylethers (PBDEs) are additive flame-retardants that are environmentally persistent and bioaccumulative compounds of particular concern to species at high trophic levels, including predatory birds. The developmental effects of in ovo exposure to male birds at environmentally relevant levels of the PBDE technical mixture, DE-71, on reproductive success and behaviors using captive American kestrels (Falco sparverius) were determined. Males were exposed in ovo by direct maternal transfer to DE-71 and unintentionally to low concentrations of hexabromocyclododecane (HBCD) at three mean +/- standard error DE-71 concentrations of 288.60 +/- 33.35 ng/g wet weight (low-exposure), 1130.59 +/- 95.34 ng/g wet weight (high-exposure), or background levels of 3.01 +/- 0.46 ng/g wet weight (control). One year following exposure, males were paired with unexposed females. Reproductive success was lower in the high exposure pairs: 43% failed to lay eggs while all other pairs laid complete clutches; they also laid smaller clutches and produced smaller eggs with reduced fertility, parameters that were negatively correlated with paternal in ovo concentrations of all PBDEs, as well as individual congeners and HBCD. Throughout courtship, there were fewer copulations by all in ovo exposed males, fewer mate-calls made by high-exposure males, and decreasing trends in pair-bonding and nest-box behaviors across treatments that continued during brood rearing. The reductions in clutch size and fertility were associated with the reduced frequencies of male courtship behaviors, and were associated with increasing concentrations of the PBDE congeners BDE-47, -99, -100, -53, -138, and HBCD. The results of the present study confirm effects noted in the F(0) generation and demonstrate that exposure to DE-71 affects multiple generations of this predatory avian species at environmentally relevant levels of exposure.
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Affiliation(s)
- Sarah C Marteinson
- Avian Science and Conservation Centre, McGill University, 21-111 Lakeshore Road, Ste-Anne-de-Bellevue, Quebec H9X 3V9, Canada
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Garcia-Fernandez V, Guasco B, Tanvez A, Lacroix A, Cucco M, Leboucher G, Malacarne G. Influence of mating preferences on yolk testosterone in the grey partridge. Anim Behav 2010. [DOI: 10.1016/j.anbehav.2010.03.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Tobler M, Hasselquist D, Smith HG, Sandell MI. Short- and long-term consequences of prenatal testosterone for immune function: an experimental study in the zebra finch. Behav Ecol Sociobiol 2009. [DOI: 10.1007/s00265-009-0889-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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46
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47
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Elevated testosterone levels affect female breeding success and yolk androgen deposition in a passerine bird. Behav Processes 2009; 82:312-8. [DOI: 10.1016/j.beproc.2009.07.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2009] [Revised: 07/22/2009] [Accepted: 07/26/2009] [Indexed: 11/21/2022]
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Harris WE, Uller T. Reproductive investment when mate quality varies: differential allocation versus reproductive compensation. Philos Trans R Soc Lond B Biol Sci 2009; 364:1039-48. [PMID: 19324609 PMCID: PMC2666688 DOI: 10.1098/rstb.2008.0299] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Reproductive investment decisions form an integral part of life-history biology. Selection frequently favours plasticity in investment that can generate maternal effects on offspring development. For example, if females differentially allocate resources based on mate attractiveness or quality, this can create a non-genetic link between mate attractiveness and offspring fitness with potential consequences for ecological and evolutionary dynamics. It is therefore important to understand under what conditions differential investment into offspring in relation to male quality is expected to occur and the direction of the effect. Two opposite predictions, increased investment into offspring produced with high-quality mates (differential allocation (DA)) and increased investment with low-quality males (reproductive compensation (RC)) have been suggested but no formal theoretical treatment justifying the assumptions underlying these two hypotheses has been conducted to date. Here, we used a state-based approach to investigate the circumstances under which the variation in mate quality results in differential female investment into offspring and how this interacts with female energetic resource levels. We found that a pattern of increased investment when mating with high-quality mates (i.e. DA) was the most common optimal investment strategy for females in our model. By contrast, increased investment when mating with low-quality mates (i.e. RC) was predicted only when the relative impact of parental investment on offspring quality was low. Finally, we found that the specific pattern of investment in relation to male quality depends on female energetic state, the likelihood for future mating opportunities and the expected future distribution of mate quality. Thus, the female's age and body condition should be important factors mediating DA and RC, which may help to explain the equivocal results of empirical studies.
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Affiliation(s)
- W Edwin Harris
- Faculty of Life Sciences, University of Manchester, Michael Smith Building, Oxford Road, Manchester M13 9PT, UK.
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Ruuskanen S, Doligez B, Tschirren B, Pitala N, Gustafsson L, Groothuis TGG, Laaksonen T. Yolk androgens do not appear to mediate sexual conflict over parental investment in the collared flycatcher Ficedula albicollis. Horm Behav 2009; 55:514-9. [PMID: 19470362 DOI: 10.1016/j.yhbeh.2009.01.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Revised: 01/26/2009] [Accepted: 01/28/2009] [Indexed: 10/21/2022]
Abstract
Males and females are in conflict over parental care, as it would be favourable for one parent to shift labour to the other. Yolk hormones may offer a mechanism through which female birds could influence offspring traits in ways that increase the relative investment by the male. We studied the role of yolk androgens in mediating sexual conflict over parental care in the collared flycatcher (Ficedula albicollis). In a cross-fostering experiment, the male's proportion of total feeding visits increased with increasing androgen levels in the foster eggs. This could suggest that sexual conflict over parental care may be influenced by the female's differential allocation of yolk androgens or a maternal effect associated with yolk androgens. However, when we experimentally elevated yolk androgen levels, male feeding rates did not differ between control and androgen-manipulated nests. This suggests that other egg components correlated with yolk androgen levels, rather than yolk androgen levels per se, may influence male parental effort. In conclusion, yolk androgens per se do not appear to mediate sexual conflict over parental investment in the collared flycatcher.
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Affiliation(s)
- Suvi Ruuskanen
- Department of Biology, University of Turku, Turku, Finland.
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Müller W, Vergauwen J, Eens M. Long-lasting consequences of elevated yolk testosterone levels on female reproduction. Behav Ecol Sociobiol 2009. [DOI: 10.1007/s00265-009-0714-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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