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Batabyal A. Predator-prey systems as models for integrative research in biology: the value of a non-consumptive effects framework. J Exp Biol 2023; 226:jeb245851. [PMID: 37772622 DOI: 10.1242/jeb.245851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Predator-prey interactions are a cornerstone of many ecological and evolutionary processes that influence various levels of biological organization, from individuals to ecosystems. Predators play a crucial role in shaping ecosystems through the consumption of prey species and non-consumptive effects. Non-consumptive effects (NCEs) can induce changes in prey behavior, including altered foraging strategies, habitat selection, life history and anti-predator responses. These defensive strategies have physiological consequences for prey, affecting their growth, reproduction and immune function to name a few. Numerous experimental studies have incorporated NCEs in investigating predator-prey dynamics in the past decade. Interestingly, predator-prey systems can also be used as experimental models to answer physiology, cognition and adaptability questions. In this Commentary, I highlight research that uses NCEs in predator-prey systems to provide novel insights into cognition, adaptation, epigenetic inheritance and aging. I discuss the evolution of instinct, anxiety and other cognitive disorders, the shaping of brain connectomes, stress-induced aging and the development of behavioral coping styles. I outline how studies can integrate the investigation of NCEs with advanced behavioral, genomic and neurological tools to provide novel insights into physiological and cognitive health.
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Affiliation(s)
- Anuradha Batabyal
- Department of Physical and Natural Sciences, FLAME University, Pune 412115, India
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2
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Summers TC, Ord TJ. Signal detection shapes ornament allometry in functionally convergent Caribbean Anolis and Southeast Asian Draco lizards. J Evol Biol 2022; 35:1508-1523. [PMID: 36177770 PMCID: PMC9828585 DOI: 10.1111/jeb.14102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 07/10/2022] [Accepted: 07/21/2022] [Indexed: 01/12/2023]
Abstract
Visual ornaments have long been assumed to evolve hyper-allometry as an outcome of sexual selection. Yet growing evidence suggests many sexually selected morphologies can exhibit other scaling patterns with body size, including hypo-allometry. The large conspicuous throat fan, or dewlap, of arboreal Caribbean Anolis lizards was one ornament previously thought to conform to the classical expectation of hyper-allometry. We re-evaluated this classic example alongside a second arboreal group of lizards that has also independently evolved a functionally equivalent dewlap, the Southeast Asian Draco lizards. Across multiple closely related species in both genera, the Anolis and Draco dewlaps were either isometric or had hypo-allometric scaling patterns. In the case of the Anolis dewlap, variation in dewlap allometry was predicted by the distance of conspecifics and the light environment in which the dewlap was typically viewed. Signal efficacy, therefore, appears to have driven the evolution of hypo-allometry in what was originally thought to be a sexually selected ornament with hyper-allometry. Our findings suggest that other elaborate morphological structures used in social communication might similarly exhibit isometric or hypo-allometric scaling patterns because of environmental constraints on signal detection.
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Affiliation(s)
- Thomas C. Summers
- Evolution and Ecology Research Centre, and the School of Biological, Earth and Environmental SciencesUniversity of New South WalesKensingtonNew South WalesAustralia
| | - Terry J. Ord
- Evolution and Ecology Research Centre, and the School of Biological, Earth and Environmental SciencesUniversity of New South WalesKensingtonNew South WalesAustralia
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3
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Frommen JG, Thünken T, Santostefano F, Balzarini V, Hettyey A. Effects of chronic and acute predation risk on sexual ornamentation and mating preferences. Behav Ecol 2021. [DOI: 10.1093/beheco/arab116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Phenotypic plasticity is widespread in animals. Still, how plastic responses to predator presence affect traits under sexual selection and influence mating preferences is not well understood. Here, we examined how simulated chronic predator presence during development and acute predator presence during mate choice affect the expression of male secondary sexual traits and female mating preference in the three-spined stickleback, Gasterosteus aculeatus. Males reared under chronic predator presence developed less intense red breeding coloration but showed higher courtship activity than males that grew up in a predator-free environment. Acute predator presence during mate choice trials did not influence male behavior or ornamentation. Predator presence experienced during development did not affect female mating preferences, whereas acute predator presence altered preferences for male courtship activity. Male body size and eye coloration influenced the intensity of female mating preferences, while the trait changing most in response to predator presence during development (red coloration) had no significant impact. The observed interplay between developmental plasticity in male ornamental traits and environment-dependent female mating preferences may lead to dynamic processes altering the strength and direction of sexual selection depending on both the chronic and acute risk of predation. These processes may contribute to the maintenance of within- and among-population variation in secondary sexual traits, and may, ultimately, facilitate speciation.
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Affiliation(s)
- Joachim G Frommen
- Konrad Lorenz Institute of Ethology, Department of Integrative Biology and Evolution, University of Veterinary Medicine Vienna, Savoyenstr. 1a, 1160 Vienna, Austria
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstr. 50a, 3032 Hinterkappelen, Switzerland
- Conservation, Ecology, Evolution and Behaviour Research Group, Ecology and Environment Research Centre, Manchester Metropolitan University, Manchester, UK
| | - Timo Thünken
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstr. 50a, 3032 Hinterkappelen, Switzerland
| | - Francesca Santostefano
- Konrad Lorenz Institute of Ethology, Department of Integrative Biology and Evolution, University of Veterinary Medicine Vienna, Savoyenstr. 1a, 1160 Vienna, Austria
- Département des Sciences Biologiques, Université du Québec à Montréal, C.P. 8888, Succ. Centre-ville Montréal, QC, Canada
| | - Valentina Balzarini
- Konrad Lorenz Institute of Ethology, Department of Integrative Biology and Evolution, University of Veterinary Medicine Vienna, Savoyenstr. 1a, 1160 Vienna, Austria
- Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Wohlenstr. 50a, 3032 Hinterkappelen, Switzerland
- Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Attila Hettyey
- Konrad Lorenz Institute of Ethology, Department of Integrative Biology and Evolution, University of Veterinary Medicine Vienna, Savoyenstr. 1a, 1160 Vienna, Austria
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Herman Ottó út 15, Budapest 1022, Hungary
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Melotto A, Ficetola GF, Manenti R. Safe as a cave? Intraspecific aggressiveness rises in predator-devoid and resource-depleted environments. Behav Ecol Sociobiol 2019. [DOI: 10.1007/s00265-019-2682-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Denoël M, Drapeau L, Winandy L. Reproductive fitness consequences of progenesis: Sex-specific pay-offs in safe and risky environments. J Evol Biol 2019; 32:629-637. [PMID: 30927549 DOI: 10.1111/jeb.13449] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 02/16/2019] [Accepted: 03/22/2019] [Indexed: 11/30/2022]
Abstract
Progenesis is considered to have an important role in evolution because it allows the retention of both a larval body size and shape in an adult morphology. However, the cost caused by the adoption of a progenetic process in both males and females remains to be explored to explain the success of progenesis and particularly its biased prevalence across the sexes and environments. Here, through an experimental approach, we used a facultative progenetic species, the palmate newt (Lissotriton helveticus) that can either mature at a small size and retain gills or mature after metamorphosis, to test three hypotheses for sex-specific pay-offs of progenesis in safe versus risky habitats. Goldfish were used because they caused a higher decline in progenetic than metamorphic newts. We determined that progenetic newts have a lower reproductive fitness than metamorphic newts. We also found that, when compared to metamorphs, progenetic males have lower reproductive activity than progenetic females and that predatory risk affects more progenetic than metamorphic newts. By identifying ultimate causes of the female-biased sex ratios found in nature, these results support the male escape hypothesis, that is the higher metamorphosis rate of progenetic males. They also highlight that although progenesis is advantageous in advancing the age at first reproduction, it also brings an immediate fitness cost and this, particularly, in hostile predatory environments. This means that whereas some environmental constraints could favour facultative progenesis, some others, such as predation, can ultimately counter-select progenesis. Altogether, these results improve our understanding of how developmental processes can affect the sexes differently and how species invasions can impair the success of alternative developmental phenotypes.
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Affiliation(s)
- Mathieu Denoël
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Group, Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
| | - Laura Drapeau
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Group, Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
| | - Laurane Winandy
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Group, Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium.,Laboratoire Evolution et Diversité Biologique, CNRS-Université Paul Sabatier-UMR 5174, Toulouse, France.,Station d'Ecologie Théorique et Expérimentale, CNRS UMR 5321, Moulis, France
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Balmer AJ, Brakefield PM, Brattström O, van Bergen E. Developmental plasticity for male secondary sexual traits in a group of polyphenic tropical butterflies. OIKOS 2018. [DOI: 10.1111/oik.05291] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrew J. Balmer
- Dept of Zoology; Univ. of Cambridge; Downing Street Cambridge CB2 3EJ UK
| | - Paul M. Brakefield
- Dept of Zoology; Univ. of Cambridge; Downing Street Cambridge CB2 3EJ UK
| | - Oskar Brattström
- Dept of Zoology; Univ. of Cambridge; Downing Street Cambridge CB2 3EJ UK
| | - Erik van Bergen
- Dept of Zoology; Univ. of Cambridge; Downing Street Cambridge CB2 3EJ UK
- Inst. Gulbenkian de Ciência; Oeiras Portugal
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Lejeune B, Sturaro N, Lepoint G, Denoël M. Facultative paedomorphosis as a mechanism promoting intraspecific niche differentiation. OIKOS 2017. [DOI: 10.1111/oik.04714] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Benjamin Lejeune
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Unit, Freshwater and Oceanic Science Unit of Research (FOCUS), Univ. of Liège; BE-4020 Liège Belgium
| | - Nicolas Sturaro
- Laboratory of Oceanology, Freshwater and Oceanic Science Unit of Research (FOCUS), Univ. of Liège; Liège Belgium
| | - Gilles Lepoint
- Laboratory of Oceanology, Freshwater and Oceanic Science Unit of Research (FOCUS), Univ. of Liège; Liège Belgium
| | - Mathieu Denoël
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Unit, Freshwater and Oceanic Science Unit of Research (FOCUS), Univ. of Liège; BE-4020 Liège Belgium
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Denoël M. On the identification of paedomorphic and overwintering larval newts based on cloacal shape: review and guidelines. Curr Zool 2017; 63:165-173. [PMID: 29491974 PMCID: PMC5804162 DOI: 10.1093/cz/zow054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/15/2016] [Indexed: 11/14/2022] Open
Abstract
Paedomorphosis is an alternative process to metamorphosis in which adults retain larval traits at the adult stage. It is frequent in newts and salamanders, where larvae reach sexual maturity without losing their gills. However, in some populations, larvae overwinter in water, while remaining immature. These alternative ontogenetic processes are of particular interest in various research fields, but have different causes and consequences, as only paedomorphosis allows metamorphosis to be bypassed before maturity. It is thus relevant to efficiently identify paedomorphs versus overwintering larvae. In this context, the aim of this article was 3-fold: firstly, to perform a meta-analysis of the identification procedures carried out in the literature; secondly, to determine the effectiveness of body size to make inferences about adulthood by surveying natural newt populations of Lissotriton helveticus and Ichthyosaura alpestris, and thirdly, to propose easy guidelines for an accurate distinction between large larvae and paedomorphs based on an external sexual trait, which is essential for reproduction-the cloaca. More than half of the studies in the literature do not mention the diagnostic criteria used for determining adulthood. The criteria mentioned were the presence of mature gonads (10%), eggs laid (4%), courtship behavior (10%), and external morphological sexual traits (39%) including the cloaca (24%). Body-size thresholds should not be used as a proxy for paedomorphosis, because overwintering larvae can reach a larger size than paedomorphs within the same populations. In contrast, diagnosis based on cloacal external morphology is recommended, as it can be processed by the rapid visual assessment of all caught specimens, thus providing straightforward data at the individual level for both sexes.
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Affiliation(s)
- Mathieu Denoël
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Unit, FOCUS, University of Liège, 22 Quai van Benden, 4020 Liège, Belgium
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Oromi N, Michaux J, Denoël M. High gene flow between alternative morphs and the evolutionary persistence of facultative paedomorphosis. Sci Rep 2016; 6:32046. [PMID: 27534370 PMCID: PMC4989185 DOI: 10.1038/srep32046] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 08/02/2016] [Indexed: 11/25/2022] Open
Abstract
Paedomorphosis and metamorphosis are two major developmental processes that characterize the evolution of complex life cycles in many lineages. Whereas these processes were fixed in some taxa, they remained facultative in others, with alternative phenotypes expressed in the same populations. From a genetic perspective, it is still unknown whether such phenotypes form a single population or whether they show some patterns of isolation in syntopy. This has deep implications for understanding the evolution of the phenotypes, i.e. towards their persistence or their fixation and speciation. Newts and salamanders are excellent models to test this hypothesis because they exhibit both developmental processes in their populations: the aquatic paedomorphs retain gills, whereas the metamorphs are able to colonize land. Using microsatellite data of coexisting paedomorphic and metamorphic palmate newts (Lissotriton helveticus), we found that they formed a panmictic population, which evidences sexual compatibility between the two phenotypes. The high gene flow could be understood as an adaptation to unstable habitats in which phenotypic plasticity is favored over the fixation of developmental alternatives. This makes then possible the persistence of a polyphenism: only metamorphosis could be maintained in case of occasional drying whereas paedomorphosis could offer specific advantages in organisms remaining in water.
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Affiliation(s)
- Neus Oromi
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Unit, Freshwater and Oceanic Science Unit of Research (FOCUS), University of Liège, 22 Quai van Beneden, 4020 Liège, Belgium
| | - Johan Michaux
- Conservation Genetics, University of Liège, Institute of Botany (Bat. 22), 2 Chemin de la Vallée, 4000 Liège, Belgium
| | - Mathieu Denoël
- Laboratory of Fish and Amphibian Ethology, Behavioural Biology Unit, Freshwater and Oceanic Science Unit of Research (FOCUS), University of Liège, 22 Quai van Beneden, 4020 Liège, Belgium
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Manenti R, Melotto A, Denoël M, Ficetola GF. Amphibians breeding in refuge habitats have larvae with stronger antipredator responses. Anim Behav 2016. [DOI: 10.1016/j.anbehav.2016.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Iglesias-Carrasco M, Head ML, Jennions MD, Cabido C. Condition-dependent trade-offs between sexual traits, body condition and immunity: the effect of novel habitats. BMC Evol Biol 2016; 16:135. [PMID: 27329759 PMCID: PMC4915150 DOI: 10.1186/s12862-016-0706-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/09/2016] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The optimal allocation of resources to sexual signals and other life history traits is usually dependent on an individual's condition, while variation in the expression of sexual traits across environments depends on the combined effects of local adaptation, mean condition, and phenotypic responses to environment-specific cues that affect resource allocation. A clear contrast can often be drawn between natural habitats and novel habitats, such as forest plantations and urban areas. In some species, males seem to change their sexual signals in these novel environments, but why this occurs and how it affects signal reliability is still poorly understood. RESULTS The relative size of sexual traits and level of immune responses were significantly lower for male palmate newts Lissotriton helveticus caught in pine and eucalyptus plantations compared to those caught in native forests, but there was no habitat-dependent difference in body condition (n = 18 sites, 382 males). The reliability with which sexual traits signalled body condition and immune responses was the same in all three habitats. Finally, we conducted a mesocosm experiment in which males were maintained in pine, eucalypt or oak infused water for 21 days. Males in plantation-like water (pine or eucalypt) showed significantly lower immune responses but no change in body condition. This matches the pattern seen for field-caught males. Unlike field-caught males, however, there was no relationship between water type and relative sexual trait size. CONCLUSIONS Pine and eucalyptus plantations are likely to be detrimental to male palmate newt because they are associated with reduced immune function and smaller sexual traits. This could be because ecological aspects of these novel habitats, such as high water turbidity or changes in male-male competition, drive selection for reduced investment into sexual traits. However, it is more probable that there are differences in the ease of acquisition, hence optimal allocation, of resources among habitats. Our mesocosm experiment also provides some evidence that water toxicity is a causal factor. Our findings offer insights into how plantations affect amphibian life histories, and how novel habitats might generate long-term selection for new resource allocation strategies in native species.
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Affiliation(s)
- Maider Iglesias-Carrasco
- />Department of Evolutionary Ecology, National Museum of Natural Sciences, Spanish National Research Council (CSIC), José Gutiérrez Abascal, 2, 28006 Madrid, Spain
- />Department of Herpetology, Aranzadi Science Society, Alto de Zorroaga, 1, 20014 Donostia-San Sebastián, Spain
| | - Megan L. Head
- />Division of Evolution, Ecology and Genetics, Research School of Biology, Australian National University, Canberra, ACT Australia
| | - Michael D. Jennions
- />Division of Evolution, Ecology and Genetics, Research School of Biology, Australian National University, Canberra, ACT Australia
| | - Carlos Cabido
- />Department of Herpetology, Aranzadi Science Society, Alto de Zorroaga, 1, 20014 Donostia-San Sebastián, Spain
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Winandy L, Colin M, Denoël M. Temporal habitat shift of a polymorphic newt species under predation risk. Behav Ecol 2016. [DOI: 10.1093/beheco/arw008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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