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Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas
Terrestrial eggs have evolved repeatedly in tropical anurans exposing embryos to the new threat of dehydration. Red-eyed treefrogs, Agalychnis callidryas, lay eggs on plants over water. Maternally provided water allows shaded eggs in humid sites to develop to hatching without rainfall, but unshaded...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
PeerJ Inc.
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5511700/ https://www.ncbi.nlm.nih.gov/pubmed/28717595 http://dx.doi.org/10.7717/peerj.3549 |
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author | Salica, María José Vonesh, James R. Warkentin, Karen M. |
author_facet | Salica, María José Vonesh, James R. Warkentin, Karen M. |
author_sort | Salica, María José |
collection | PubMed |
description | Terrestrial eggs have evolved repeatedly in tropical anurans exposing embryos to the new threat of dehydration. Red-eyed treefrogs, Agalychnis callidryas, lay eggs on plants over water. Maternally provided water allows shaded eggs in humid sites to develop to hatching without rainfall, but unshaded eggs and those in less humid sites can die from dehydration. Hatching responses of amphibian eggs to dry conditions are known from two lineages with independent origins of terrestrial eggs. Here, we experimentally tested for dehydration-induced early hatching in another lineage (Agalychnis callidryas, Phyllomedusidae), representing a third independent origin of terrestrial eggs. We also investigated how dehydration affected egg and clutch structure, and egg mortality. We collected clutches from a pond in Gamboa, Panama, and randomly allocated them to wet or dry treatments at age 1 day. Embryos hatched earlier from dry clutches than from wet clutches, accelerating hatching by ∼11%. Clutch thickness and egg diameter were affected by dehydration, diverging between treatments over time. Meanwhile, mortality in dry clutches was six-fold higher than in control clutches. With this study, early hatching responses to escape mortality from egg dehydration are now known from three anuran lineages with independent origins of terrestrial eggs, suggesting they may be widespread. Further studies are needed to understand how terrestrial amphibian eggs can respond to, or will be affected by, rapid changes in climate over the next decades. |
format | Online Article Text |
id | pubmed-5511700 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | PeerJ Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-55117002017-07-17 Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas Salica, María José Vonesh, James R. Warkentin, Karen M. PeerJ Developmental Biology Terrestrial eggs have evolved repeatedly in tropical anurans exposing embryos to the new threat of dehydration. Red-eyed treefrogs, Agalychnis callidryas, lay eggs on plants over water. Maternally provided water allows shaded eggs in humid sites to develop to hatching without rainfall, but unshaded eggs and those in less humid sites can die from dehydration. Hatching responses of amphibian eggs to dry conditions are known from two lineages with independent origins of terrestrial eggs. Here, we experimentally tested for dehydration-induced early hatching in another lineage (Agalychnis callidryas, Phyllomedusidae), representing a third independent origin of terrestrial eggs. We also investigated how dehydration affected egg and clutch structure, and egg mortality. We collected clutches from a pond in Gamboa, Panama, and randomly allocated them to wet or dry treatments at age 1 day. Embryos hatched earlier from dry clutches than from wet clutches, accelerating hatching by ∼11%. Clutch thickness and egg diameter were affected by dehydration, diverging between treatments over time. Meanwhile, mortality in dry clutches was six-fold higher than in control clutches. With this study, early hatching responses to escape mortality from egg dehydration are now known from three anuran lineages with independent origins of terrestrial eggs, suggesting they may be widespread. Further studies are needed to understand how terrestrial amphibian eggs can respond to, or will be affected by, rapid changes in climate over the next decades. PeerJ Inc. 2017-07-14 /pmc/articles/PMC5511700/ /pubmed/28717595 http://dx.doi.org/10.7717/peerj.3549 Text en ©2017 Salica et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited. |
spellingShingle | Developmental Biology Salica, María José Vonesh, James R. Warkentin, Karen M. Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas |
title | Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas |
title_full | Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas |
title_fullStr | Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas |
title_full_unstemmed | Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas |
title_short | Egg clutch dehydration induces early hatching in red-eyed treefrogs, Agalychnis callidryas |
title_sort | egg clutch dehydration induces early hatching in red-eyed treefrogs, agalychnis callidryas |
topic | Developmental Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5511700/ https://www.ncbi.nlm.nih.gov/pubmed/28717595 http://dx.doi.org/10.7717/peerj.3549 |
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