The Correlates of in Situ Larval Survivorship of the Threatened South American Toad Melanophryniscus montevidensis (Anura, Bufonidae)

Bardier, Cecilia; Maneyro, Raúl; Toledo, Luı́s Felipe

doi:10.2994/sajh-d-17-00019.1

Cited by 3 publications

(4 citation statements)

References 62 publications

(75 reference statements)

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“…Our previous studies have shown that adults can select warmer breeding ponds located in sectors of gentle slopes (Goldberg et al 2006). These conditions of breeding sites seem consistent with descriptions for other species of the genus (Pereyra et al 2011;Bardier et al 2020). Warmer water temperatures would permit larval further accelerated developments that would be vitally important at these places where the duration of ponds is short and unpredictable.…”

Section: Phenotypic Plasticitysupporting

confidence: 82%

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Lack of response to pond desiccation by eggs and tadpoles of the Yungas Red-belly Toad (Melanophryniscus rubriventris) in an unpredictable environment

2022

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Anuran amphibians that breed in ephemeral ponds of unpredictable environments have mechanisms to tolerate or avoid associated risks of egg and tadpole mortality, such as selection of oviposition sites, plasticity in larval development, and resistance of eggs to desiccation. The Red-belly Toad Melanophryniscus rubriventris (Vellard 1947) breeds in temporary ponds in the Andean Yungas under unpredictable events of flooding and droughts of reproductive sites. To determine whether this species possesses any developmental mechanisms to deal with the environmental conditions, we experimentally evaluated the resistance of eggs subjected to different times of exposure to air and the tadpoles to different levels of pond desiccation. The species has not developed mechanisms of resistance of its eggs or phenotypic plasticity to the recurrent risks of pond desiccation, and mass mortality is a common event. In such a context explosive breeding highly synchronized with rainfall, together with fast larval development, seems to be vitally important at these places where the duration of ponds is short and unpredictable.

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Section: Phenotypic Plasticitysupporting

confidence: 82%

“…Other authors also reported mass mortality of Melanophryniscus sp. tadpoles after the ponds dried out (Cairo et al 2008;Bardier et al 2020). So, in M. rubriventris as it seems in other species of the genus, offspring survival depends more on climatic events that prevent pond drying rather than on developmental plasticity.…”

Section: Phenotypic Plasticitymentioning

confidence: 99%

Lack of response to pond desiccation by eggs and tadpoles of the Yungas Red-belly Toad (Melanophryniscus rubriventris) in an unpredictable environment

2022

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“…Our results indicate that the abundance of P. nattereri was asso- Besides survival, density dependence can also affect anuran development (e.g., Bardier et al, 2020;Harper & Semlitsch, 2007;Travis & Trexler, 1986). This might explain why cerrado sensu stricto (vegetation type with the lowest abundance; N = 36) not only had on average larger individuals, but also smaller estimated mortality rates than cerradão (highest abundance; N = 113).…”

Section: Discussionmentioning

confidence: 71%

“…Although we did not detect a significant effect of distance from ephemeral ponds on P. nattereri survival, our study only dealt with juvenile and adult stages, and the possible effects of this variable on the larval stage are still unknown. Besides survival, density dependence can also affect anuran development (e.g., Bardier et al, 2020; Harper & Semlitsch, 2007; Travis & Trexler, 1986). This might explain why cerrado sensu stricto (vegetation type with the lowest abundance; N = 36) not only had on average larger individuals, but also smaller estimated mortality rates than cerradão (highest abundance; N = 113).…”

Section: Discussionmentioning

confidence: 99%

Effects of environmental factors on the ecology and survival of a widespread, endemic Cerrado frog

et al. 2023

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Understanding the mechanisms that affect habitat use by vertebrates is critical for understanding how species are distributed across landscapes and how they cope with habitat change. The Brazilian Savanna (the Cerrado) has vegetation ranging from grassland to woodland savannas and harbors a rich and diverse amphibian fauna impacted by accelerated habitat loss. Here, we test the influence of vegetation type (from grassy scrubland to woodland) and distance from breeding sites (ephemeral water bodies) on body size, abundance, and survival of the frog Physalaemus nattereri in a natural metapopulation system of south‐central Brazil. We also test whether body size is a significant predictor of population abundance. We found that the abundance of P. nattereri varies according to the mean snout–vent length of each metapopulation (sampling unit), as well as a higher estimated mortality rate in woodlands compared with typical Cerrado. Furthermore, we found no difference in estimated mortality among sampling units located far or close to ephemeral water bodies. Thus, our results highlight variable responses of P. nattereri metapopulations to environmental factors, despite the observed high heterogeneity among sampled habitats and the importance of ephemeral water bodies for reproduction. These findings highlight that land cover and availability of breeding sites might not always interact to explain population persistence of Cerrado frogs.

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Developments in the study of poison frog evolutionary ecology I: social interactions, life history and habitat use across space and ontogeny

Vargas-Salinas,

Rojas

2024

Evol Ecol

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The Correlates of in Situ Larval Survivorship of the Threatened South American Toad Melanophryniscus montevidensis (Anura, Bufonidae)

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 3 publications

References 62 publications

Lack of response to pond desiccation by eggs and tadpoles of the Yungas Red-belly Toad (Melanophryniscus rubriventris) in an unpredictable environment

Lack of response to pond desiccation by eggs and tadpoles of the Yungas Red-belly Toad (Melanophryniscus rubriventris) in an unpredictable environment

Effects of environmental factors on the ecology and survival of a widespread, endemic Cerrado frog

Developments in the study of poison frog evolutionary ecology I: social interactions, life history and habitat use across space and ontogeny

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