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What are the contributions of maternal and paternal traits to fecundity and offspring development?A case study in an amphibian species,the spined toad Bufo spinosus

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Current Zoology 2023年第5期69卷 527-534页

作者： Matthias Renoirt Frédéric Angelier Marion Cheron françois brischoux Centre d’Etudes Biologiques de Chizé CEBC UMR 7372 CNRS-La Rochelle Université79360 Villiers en BoisFrance

Assessing the determinants of reproductive success is critical but often complicated because of complex interactions between parental traits and environmental conditions occurring during several stages of a reproductive ***,we used a simplified ecological situation-an amphibian species lacking post-oviposition parental care-and a laboratory approach to investigate the relationships between parental(both maternal and paternal)phenotypes(body size and condition)and reproductive success(fecundity,egg size,embryonic and larval duration,larval and metamorphic morphology).We found significant effects of maternal phenotype on fecundity,hatching success,and tadpole size,as well as on the duration of larval ***,and more surprisingly,we also found a potential contribution of the paternal phenotype occurring during early(embryonic development duration)offspring *** our study focused on life-history traits such as body size and development duration,additional mechanisms involving physiological costs of development may well mediate the relationships between parental phenotypes and offspring *** studies are required to decipher the mechanisms underlying our findings in order to clarify the mechanistic basis of the links between parental phenotypes and offspring development.

关键词： clutch quality embryonic development larval development phenotype reproductive success

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Vineyards,but not cities,are associated with lower presence of a generalist bird,the Common Blackbird(Turdus merula),in Western france

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Avian Research 2021年第1期12卷 17-27页

作者： Bertille Mohring francois brischoux Frédéric Angelier Centre d’Etudes Biologiques de Chizé UMR 7372CNRS–La Rochelle Université79360 Villiers en BoisFrance Environmental and Marine Biology Abo Akademi University20520 TurkuFinland.

Background:Land-use change is one of the main drivers of the global erosion of *** that context,it is crucial to understand how landscape characteristics drive the presence of rare endangered ***,it is also important to study common species in multiple habitats,because they represent a large proportion of biodiversity and are essential to maintain ecological ***,some habitats,as farmlands with permanent crops(***),have been overlooked in the ***:In this study,we investigated the distribution of a widespread and common bird species,the Common Blackbird(Turdus merula),within and between the three main habitats of our study area(rural Western france).We specifically focused on(1)woodlands,(2)farmlands with a high vineyard coverage,and(3)moderately urbanized ***,we aimed to assess the beneficial and detrimental effects of these habitats and their fine-scale composition on the presence of a common bird species,relying on a survey by point counts(nearly 100 locations).We studied the effects of habitats and gradients of fine-scale habitat composition on blackbird presence using logistic regression ***:Blackbirds were present in all studied ***,their presence varied between habitats,being lower in vineyards than in woodlands and *** woodlands and cities,fine-scale analyses did not reveal any component driving the species'***,we found that shrub and tree vegetation cover had a significant positive effect on blackbird presence in ***:Our results are in agreement with the definition of a generalist ***,species distribution varied between *** high presence of blackbirds in urban areas suggests that medium-sized cities,despite their artificialization,do not constrain the settlement of this former forest specialist and that green spaces may allow blackbirds to thrive in medium-sized *** the contrar

关键词： Agriculture Biodiversity Birds Forest Turdus merula Urbanization Vineyards

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