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Johnson DW, Chhor JT, Shelley CE, Siegfried EJ. Indirect costs of reproduction and the tradeoff between offspring size and number: a framework illustrated by fitness costs and benefits of ovarian fluid. Evolution 2024; 78:1248-1260. [PMID: 38572986 DOI: 10.1093/evolut/qpae056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/13/2024] [Accepted: 04/03/2024] [Indexed: 04/05/2024]
Abstract
The theory describing the evolution of offspring size often assumes that the production cost per unit volume is the same for small and large offspring. However, this may not be true if indirect costs of reproduction (e.g., material and energetic costs of supporting offspring development) scale disproportionately with offspring size. Here we show how direct and indirect costs of reproduction can be explicitly modeled within the Smith-Fretwell framework and how observations of size-number relationships can thus be used to evaluate indirect costs. We applied this analysis to measures of egg volume and fecundity for over 300 individuals of a coastal fish species and found that the tradeoff was much stronger than the expected inverse (fecundity scaled with volume-1.843). Larger offspring were thus more expensive to produce. For our study species, an important indirect cost was that larger eggs were accompanied by disproportionately more ovarian fluid. Calorimetry and removal experiments were used to further measure both the energetic costs and fitness benefits of ovarian fluid. In addition, we show that indirect costs of reproduction can intensify size-number tradeoffs in a variety of fishes. Indirect costs of reproduction can be large and may therefore play an important role in the evolution of offspring size.
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Affiliation(s)
- Darren W Johnson
- Department of Biological Sciences, California State University, Long Beach, CA, United States
| | - James T Chhor
- Department of Biological Sciences, California State University, Long Beach, CA, United States
| | - Callyn E Shelley
- Department of Biological Sciences, California State University, Long Beach, CA, United States
| | - Emma J Siegfried
- Department of Biological Sciences, California State University, Long Beach, CA, United States
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2
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Lorrain-Soligon L, Bizon T, Robin F, Jankovic M, Brischoux F. Variations of salinity during reproduction and development affect ontogenetic trajectories in a coastal amphibian. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:11735-11748. [PMID: 38225486 DOI: 10.1007/s11356-024-31886-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 01/02/2024] [Indexed: 01/17/2024]
Abstract
Although coastal ecosystems are naturally submitted to temporal variations of salinity, salinization has been increasing over time threatening coastal biodiversity. Species that exploit such habitats can thus be exposed to brackish water at different life stages. However, the impacts of variations of salinity on wildlife remain poorly understood. This is particularly true for coastal amphibians, due to the strong dependency of early life stages (embryos and larvae) on aquatic environments. In order to investigate the effect of salinity during egg laying and embryonic and larval development of coastal amphibians, we used a full-factorial design to expose reproductive adults, eggs, and larvae of coastal spined toads (Bufo spinosus) to fresh (0 g.l-1) or brackish water (4 g.l-1). At egg laying, we evaluated parental investment in reproduction. During embryonic and larval development, we assessed effects on survival, development, and growth. We highlighted strong effects of environmental salinity on reproduction (reduced egg laying time, marginally reduced egg size, and reduced investment in reproduction). Responses to salinity were highly dependent on the developmental stages of exposure (stronger effects when individuals were exposed during embryonic development). These effects carried over when exposure occurred at egg laying or during embryonic development, highlighting the importance of the environmental conditions during early life on ontogenetic trajectories. We also highlighted partial compensation when individuals were transferred back to freshwater. Whether the magnitude of these responses can allow coastal biodiversity to overcome the observed detrimental effects of salinization remain to be assessed.
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Affiliation(s)
- Léa Lorrain-Soligon
- UMR 7372: Centre d'Etudes Biologiques de Chizé (CEBC) - CNRS - La Rochelle Université, 405 route de Prissé la Charrière, 79360, Villiers en Bois, France.
| | - Timothé Bizon
- UMR 7372: Centre d'Etudes Biologiques de Chizé (CEBC) - CNRS - La Rochelle Université, 405 route de Prissé la Charrière, 79360, Villiers en Bois, France
| | - Frédéric Robin
- LPO France, Fonderies Royales, 17300, Rochefort, France
- Réserve naturelle du marais d'Yves LPO, Ferme de la belle espérance, 17340, Yves, France
| | - Marko Jankovic
- Réserve naturelle du marais d'Yves LPO, Ferme de la belle espérance, 17340, Yves, France
| | - François Brischoux
- UMR 7372: Centre d'Etudes Biologiques de Chizé (CEBC) - CNRS - La Rochelle Université, 405 route de Prissé la Charrière, 79360, Villiers en Bois, France
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3
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Reyes-Contreras M, de Vries B, van der Molen JC, Groothuis TGG, Taborsky B. Egg-mediated maternal effects in a cooperatively breeding cichlid fish. Sci Rep 2023; 13:9759. [PMID: 37328515 PMCID: PMC10276030 DOI: 10.1038/s41598-023-35550-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Accepted: 05/19/2023] [Indexed: 06/18/2023] Open
Abstract
Mothers can influence offspring phenotype through egg-mediated maternal effects, which can be influenced by cues mothers obtain from their environment during offspring production. Developing embryos use these components but have mechanisms to alter maternal signals. Here we aimed to understand the role of mothers and embryos in how maternal effects might shape offspring social phenotype. In the cooperatively breeding fish Neolamprologus pulcher different social phenotypes develop in large and small social groups differing in predation risk and social complexity. We manipulated the maternal social environment of N. pulcher females during egg laying by allocating them either to a small or a large social group. We compared egg mass and clutch size and the concentration of corticosteroid metabolites between social environments, and between fertilized and unfertilized eggs to investigate how embryos deal with maternal signalling. Mothers in small groups produced larger clutches but neither laid smaller eggs nor bestowed eggs differently with corticosteroids. Fertilized eggs scored lower on a principal component representing three corticosteroid metabolites, namely 11-deoxycortisol, cortisone, and 11-deoxycorticosterone. We did not detect egg-mediated maternal effects induced by the maternal social environment. We discuss that divergent social phenotypes induced by different group sizes may be triggered by own offspring experience.
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Affiliation(s)
- Maria Reyes-Contreras
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50A, 3032, Hinterkappelen, Switzerland
| | - Bonnie de Vries
- The Groningen Institute for Evolutionary Life Science, University of Groningen, Nijenborgh 7, 9747 AG, Groningen, The Netherlands
| | - J C van der Molen
- Laboratorium Bijzondere Chemie, Cluster Endocrinologie and Metabole Ziekten, University Medical Center Groningen, 9700 RB, Groningen, The Netherlands
| | - T G G Groothuis
- The Groningen Institute for Evolutionary Life Science, University of Groningen, Nijenborgh 7, 9747 AG, Groningen, The Netherlands
| | - Barbara Taborsky
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstrasse 50A, 3032, Hinterkappelen, Switzerland.
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4
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Gould J, Beranek C, Valdez J, Mahony M. Quantity
versus
quality: A balance between egg and clutch size among Australian amphibians in relation to other life‐history variables. AUSTRAL ECOL 2022. [DOI: 10.1111/aec.13154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- John Gould
- Conservation Science Research Group, School of Environmental and Life Sciences University of Newcastle Callaghan New South Wales 2308 Australia
| | - Chad Beranek
- Conservation Science Research Group, School of Environmental and Life Sciences University of Newcastle Callaghan New South Wales 2308 Australia
- FAUNA Research Alliance PO Box 5092, Kahibah New South Wales 2290 Australia
| | - Jose Valdez
- Department of Bioscience – Kalø Aarhus University Grenåvej 14, 8410 Rønde Denmark
| | - Michael Mahony
- Conservation Science Research Group, School of Environmental and Life Sciences University of Newcastle Callaghan New South Wales 2308 Australia
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5
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Nest site selection and breeding ecology of the Ferruginous Duck (Aythya nyroca) in Algeria. Glob Ecol Conserv 2021. [DOI: 10.1016/j.gecco.2021.e01524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Smalås A, Strøm JF, Amundsen P, Dieckmann U, Primicerio R. Climate warming is predicted to enhance the negative effects of harvesting on high‐latitude lake fish. J Appl Ecol 2019. [DOI: 10.1111/1365-2664.13535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aslak Smalås
- Faculty of Biosciences, Fisheries and Economics UiT – The Arctic University of Norway Tromsø Norway
| | - John F. Strøm
- Faculty of Biosciences, Fisheries and Economics UiT – The Arctic University of Norway Tromsø Norway
| | - Per‐Arne Amundsen
- Faculty of Biosciences, Fisheries and Economics UiT – The Arctic University of Norway Tromsø Norway
| | - Ulf Dieckmann
- Evolution and Ecology Program International Institute for Applied Systems Analysis Laxenburg Austria
- Department of Evolutionary Studies of Biosystems The Graduate University for Advanced Studies (Sokendai) Hayama Japan
| | - Raul Primicerio
- Faculty of Biosciences, Fisheries and Economics UiT – The Arctic University of Norway Tromsø Norway
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Zajitschek SRK, Dowling DK, Head ML, Rodriguez-Exposito E, Garcia-Gonzalez F. Transgenerational effects of maternal sexual interactions in seed beetles. Heredity (Edinb) 2018; 121:282-291. [PMID: 29802349 DOI: 10.1038/s41437-018-0093-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 03/14/2018] [Accepted: 04/23/2018] [Indexed: 11/10/2022] Open
Abstract
Mating often bears large costs to females, especially in species with high levels of sexual conflict over mating rates. Given the direct costs to females associated with multiple mating, which include reductions in lifespan and lifetime reproductive success, past research focused on identifying potential indirect benefits (through increases in offspring fitness) that females may accrue. Far less attention has, however, been devoted to understanding how costs of sexual interactions to females may extend across generations. Hence, little is known about the transgenerational implications of variation in mating rates, or the net consequences of maternal sexual activities across generations. Using the seed beetle, Callosobruchus maculatus, a model system for the study of sexual conflict, we investigate the effects of mating with multiple males versus a single male, and tease apart effects due to sexual harassment and those due to mating per se, over three generations. A multigenerational analysis indicated that females that were exposed to ongoing sexual harassment and who also were permitted to mate with multiple males showed no difference in net fitness compared to females that mated just once without ongoing harassment. Intriguingly, however, females that were continually harassed, but permitted to mate just once, suffered a severe decline in net fitness compared to females that were singly (not harassed) or multiply mated (harassed, but potentially gaining benefits via mating with multiple males). Overall, the enhanced fitness in multiply mated compared to harassed females may indicate that multiple mating confers transgenerational benefits. These benefits may counteract, but do not exceed (i.e., we found no difference between singly and multiply mated females), the large transgenerational costs of harassment. Our study highlights the importance of examining transgenerational effects from an inclusive (looking at both indirect benefits but also costs) perspective, and the need to investigate transgenerational effects across several generations if we are to fully understand the consequences of sexual interactions, sexual conflict evolution, and the interplay of sexual conflict and multi-generational costs and benefits.
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Affiliation(s)
- Susanne R K Zajitschek
- Estación Biológica de Doñana - CSIC, Seville, 41092, Spain. .,School of Biological Sciences, Monash University, Clayton, 3800, VIC, Australia.
| | - Damian K Dowling
- School of Biological Sciences, Monash University, Clayton, 3800, VIC, Australia
| | - Megan L Head
- Research School of Biology, Australian National University, Canberra, 0200, ACT, Australia
| | | | - Francisco Garcia-Gonzalez
- Estación Biológica de Doñana - CSIC, Seville, 41092, Spain.,Centre for Evolutionary Biology, School of Biological Sciences, The University of Western Australia, Crawley, 6009, WA, Australia
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