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Manuel R, Johannes T, Sathyan R, Couldridge VCK. Temporal partitioning of Bullacris unicolor (Orthoptera: Pneumoridae) calling activity to avoid predation. BIOACOUSTICS 2023. [DOI: 10.1080/09524622.2023.2170469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Robyn Manuel
- Department of Biodiversity and Conservation Biology, University of the Western Cape, Bellville, South Africa
| | - Tarné Johannes
- Department of Biodiversity and Conservation Biology, University of the Western Cape, Bellville, South Africa
| | - Rekha Sathyan
- Department of Biodiversity and Conservation Biology, University of the Western Cape, Bellville, South Africa
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Food level and light conditions affect the antipredator behavior in larvae of a stream-breeding amphibian. Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-02966-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Santoyo-Brito E, Perea-Fox S, Núñez H, Fox S. Maternal care and secretive behaviour of neonates in the highly social lizard Liolaemus leopardinus (Squamata: Liolaemidae) from the central Chilean Andes may relate to size-specific bird predation. BEHAVIOUR 2021. [DOI: 10.1163/1568539x-bja10065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Predation prompts the evolution of antipredator traits, molds behaviour, and can lead to the evolution of parental care. We investigated parental care and predator-avoidance behaviour of neonates in the social lizard Liolaemus leopardinus. We used clay models to quantify bird predation pressure on L. leopardinus. Predation was significantly greater on small models and models in open habitat. Late-term pregnant females left their social groups on rock outcrops and gave birth in solitary underneath flat rocks in vegetated microhabitat. Mothers stayed with their litters inside natal chambers for at least 24 h and when they left, sealed the neonates inside. Mothers remained close to their natal chamber and neonates when neonates emerged. Neonates and young yearlings moved significantly less and occupied vegetated microhabitat significantly more than older age classes. We suggest that the maternal behaviour and secretive behaviour of neonates may be related to the heavy avian predation on neonates.
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Affiliation(s)
- Enrique Santoyo-Brito
- Department of Integrative Biology and Collection of Vertebrates, Oklahoma State University, Stillwater, OK 74078, USA
| | - Susana Perea-Fox
- Department of Languages and Literatures, Oklahoma State University, Stillwater, OK 74078, USA
| | - Herman Núñez
- Area Zoología, Museo Nacional de Historia Natural de Chile, Santiago, Chile
| | - Stanley F. Fox
- Department of Integrative Biology and Collection of Vertebrates, Oklahoma State University, Stillwater, OK 74078, USA
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Lejeune B, Bissey L, Didaskalou EA, Sturaro N, Lepoint G, Denoël M. Progenesis as an intrinsic factor of ecological opportunity in a polyphenic amphibian. Funct Ecol 2020. [DOI: 10.1111/1365-2435.13708] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin Lejeune
- Laboratory of Ecology and Conservation of Amphibians (LECA) Freshwater and OCeanic science Unit of reSearch (FOCUS) University of Liège Liège Belgium
- Laboratory of Oceanology Freshwater and OCeanic science Unit of reSearch (FOCUS) University of Liège Liège Belgium
| | - Lucie Bissey
- Laboratory of Ecology and Conservation of Amphibians (LECA) Freshwater and OCeanic science Unit of reSearch (FOCUS) University of Liège Liège Belgium
| | - Emilie Alexia Didaskalou
- Laboratory of Ecology and Conservation of Amphibians (LECA) Freshwater and OCeanic science Unit of reSearch (FOCUS) University of Liège Liège Belgium
| | - Nicolas Sturaro
- Laboratory of Oceanology Freshwater and OCeanic science Unit of reSearch (FOCUS) University of Liège Liège Belgium
| | - Gilles Lepoint
- Laboratory of Oceanology Freshwater and OCeanic science Unit of reSearch (FOCUS) University of Liège Liège Belgium
| | - Mathieu Denoël
- Laboratory of Ecology and Conservation of Amphibians (LECA) Freshwater and OCeanic science Unit of reSearch (FOCUS) University of Liège Liège Belgium
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Székely D, Cogălniceanu D, Székely P, Denoël M. Adult-Juvenile interactions and temporal niche partitioning between life-stages in a tropical amphibian. PLoS One 2020; 15:e0238949. [PMID: 32925925 PMCID: PMC7489520 DOI: 10.1371/journal.pone.0238949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 08/26/2020] [Indexed: 01/07/2023] Open
Abstract
Divergence in ecological niche offers organisms the opportunity of exploiting different food and habitat resources, scaling down competition and predation both among species, and within different age or size-classes of the same species. In harsh environments, where abiotic factors determine a clustering of resources during short timespans, competition and predation between organisms is likely to be enhanced. This is the case in tropical dry forests, where amphibians have limited opportunities to feed, their activity being restricted to the short rainy season. One way to maximize resource exploitation while avoiding predation risk is by adopting different diel activity patterns. We tested this hypothesis by comparing activity patterns in adults and recently metamorphosed juveniles of Pacific horned frogs (Ceratophrys stolzmanni) during field surveys and in an experimental study. Field surveys showed that the adults are strictly nocturnal, whereas freshly metamorphosed juveniles can be found active above ground at all hours, with a peak activity during daytime. The average body condition index of juveniles found active during the night was higher than that of juveniles found active during the day, suggesting that the weaker individuals may be constrained to being active during the day. On the other hand, in a laboratory experiment, juveniles that were visually exposed to adults moved less than those in the absence of adults. Both field and experimental observations indicate a temporal niche divergence between life stages. The results of the experiment offer support to the hypothesis that the juveniles in this species display an inverse activity pattern compared to adults, which can reduce competitive interactions and predation pressure from the larger conspecifics.
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Affiliation(s)
- Diana Székely
- Laboratorio de Ecología Tropical y Servicios Ecosistémicos - EcoSs Lab, Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja, Loja, Ecuador
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanța, Constanța, Romania
- Laboratory of Ecology and Conservation of Amphibians (LECA), Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
| | - Dan Cogălniceanu
- Faculty of Natural and Agricultural Sciences, Ovidius University Constanța, Constanța, Romania
- Asociation Chelonia, București, Romania
| | - Paul Székely
- Laboratorio de Ecología Tropical y Servicios Ecosistémicos - EcoSs Lab, Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja, Loja, Ecuador
- Asociation Chelonia, București, Romania
- * E-mail:
| | - Mathieu Denoël
- Laboratory of Ecology and Conservation of Amphibians (LECA), Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
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Affiliation(s)
- Mattia Falaschi
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano 20133, Italy
| | - Andrea Melotto
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano 20133, Italy
| | - Raoul Manenti
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano 20133, Italy
| | - Gentile Francesco Ficetola
- Department of Environmental Science and Policy, Università degli Studi di Milano, Via Celoria 26, Milano 20133, Italy
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The Effect of Shelter on Oxidative Stress and Aggressive Behavior in Crested Newt Larvae ( Triturus spp.). Animals (Basel) 2020; 10:ani10040603. [PMID: 32244815 PMCID: PMC7222759 DOI: 10.3390/ani10040603] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 03/29/2020] [Accepted: 03/30/2020] [Indexed: 12/22/2022] Open
Abstract
Shelters are important for animal survival. Provision of adequate hiding places allow animals to express their natural sheltering behavior and it can have different positive effects on cortisol levels, physiological processes and mental performance. Although the absence of a refuge activates some stress response, its effect on oxidative stress has not been adequately examined. This study investigated whether the presence/absence of a shelter modifies the oxidative status (the antioxidant system and oxidative damage) and aggressive behavior of crested newt larvae (Triturus macedonicus and its hybrid with T. ivanbureschi). Our results show that individuals reared with shelters had lower values of the tested antioxidant parameters (catalase, glutathione peroxidase, glutathione S-transferase and glutathione), indicating a lower production of reactive species than individuals reared without shelter. The same pattern was observed in both T. macedonicus and its hybrid. Contrary to the activation of some physiological pathways, shelter availability did not significantly affect the rate of intraspecific aggressive behavior. The physiological benefits of shelter use can be manifested as a lower requirement for investment in the energy necessary for the maintenance of the upregulated antioxidant defenses, activation of repair systems and synthesis of endogenous antioxidants. This study highlights the importance of shelter provision, which may be valuable in habitat restoration and animal conservation studies.
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Denoël M, Drapeau L, Oromi N, Winandy L. The role of predation risk in metamorphosis versus behavioural avoidance: a sex-specific study in a facultative paedomorphic amphibian. Oecologia 2019; 189:637-645. [PMID: 30809707 DOI: 10.1007/s00442-019-04362-8] [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] [Received: 05/03/2018] [Accepted: 02/18/2019] [Indexed: 10/27/2022]
Abstract
Evolutionary theory predicts the evolution of metamorphosis over paedomorphosis (the retention of larval traits at the adult stage) in response to life in unfavourable habitats and to the benefits of dispersal. Although many organisms are canalised into obligatory complex or simple life cycles, some species of newts and salamanders can express both processes (facultative paedomorphosis). Previous research highlighted the detrimental effect of fish on both metamorphic and paedomorphic phenotypes, but it remains unknown whether predation risk could induce shifts from paedomorphosis to metamorphosis, whether behavioural avoidance could be an alternative strategy to metamorphosis and whether these responses could be sex-biased. Testing these hypotheses is important because metamorphosed paedomorphs are dispersal individuals which could favour the long-term persistence of the process by breeding subsequently in more favourable waters. Therefore, we quantified the spatial behaviour and timing of the metamorphosis of facultative paedomorphic palmate newts Lissotriton helveticus in response to predation risk. We found that fish induced both male and female paedomorphs to hide more often, but behavioural avoidance was not predictive of metamorphosis. Paedomorphs did not metamorphose more in the presence of fish, yet there was an interaction between sex and predation risk in metamorphosis timing. These results improve our understanding of the lower prevalence of paedomorphs in fish environments and of the female-biased sex ratios in natural populations of paedomorphic newts. Integrating sex-dependent payoffs of polyphenisms and dispersal across habitats is therefore essential to understand the evolution of these processes in response to environmental change.
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Affiliation(s)
- M Denoël
- Behavioural Biology Group, Laboratory of Fish and Amphibian Ethology, Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège (ULiège), Liège, Belgium.
| | - L Drapeau
- Behavioural Biology Group, Laboratory of Fish and Amphibian Ethology, Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège (ULiège), Liège, Belgium
| | - N Oromi
- Behavioural Biology Group, Laboratory of Fish and Amphibian Ethology, Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège (ULiège), Liège, Belgium
| | - L Winandy
- Behavioural Biology Group, Laboratory of Fish and Amphibian Ethology, Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège (ULiège), Liège, Belgium.,Laboratoire Evolution et Diversité Biologique, CNRS, UMR 5174, Université Paul Sabatier, Toulouse, France.,Station d'Ecologie Théorique et Expérimentale, CNRS UMR 5321, Moulis, France
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Out of the ground: two coexisting fossorial toad species differ in their emergence and movement patterns. ZOOLOGY 2017; 121:49-55. [DOI: 10.1016/j.zool.2016.12.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 11/22/2016] [Accepted: 12/16/2016] [Indexed: 11/22/2022]
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