Ghost crab predation of loggerhead turtle eggs across thermal habitats
The reproductive success of sea turtles is highly influenced by the environmental and biological conditions of the nesting beach. Maio Island, Cabo Verde, one of the main nesting sites for the Northeast Atlantic loggerhead subpopulation, displays marked heterogeneity of sand coloration, with dark, m...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Language: | English |
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Online Access: | http://hdl.handle.net/10400.12/8654 https://doi.org/10.1016/j.jembe.2022.151735 |
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ftispalisboa:oai:repositorio.ispa.pt:10400.12/8654 2023-05-15T17:41:45+02:00 Ghost crab predation of loggerhead turtle eggs across thermal habitats Martins, Rita Marco, Adolfo Patino, Juan Camilo Yeoman, Kate Vinagre, Catarina Patrício, Ana Rita 2022-05-12T15:57:26Z http://hdl.handle.net/10400.12/8654 https://doi.org/10.1016/j.jembe.2022.151735 eng eng Elsevier info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04292%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT Martins, R., Marco, A., Patino-Martinez, J., Yeoman, K., Vinagre, C., & Patrício, A. R. (2022). Ghost crab predation of loggerhead turtle eggs across thermal habitats. Journal of Experimental Marine Biology and Ecology, 551. https://doi.org/10.1016/j.jembe.2022.151735 22967745 http://hdl.handle.net/10400.12/8654 doi:10.1016/j.jembe.2022.151735 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY Caretta caretta Clutch mortality Thermal habitats Ghost crab predation Sea turtles Cabo Verde article 2022 ftispalisboa https://doi.org/10.1016/j.jembe.2022.151735 2022-05-30T08:47:32Z The reproductive success of sea turtles is highly influenced by the environmental and biological conditions of the nesting beach. Maio Island, Cabo Verde, one of the main nesting sites for the Northeast Atlantic loggerhead subpopulation, displays marked heterogeneity of sand coloration, with dark, mixed and light sandy beaches, resulting in different thermal habitats. Considering that sand temperature can influence both sea turtle embryo development and predatory activity by ghost crabs – the main predators of clutches and hatchlings at Cabo Verde – we surveyed loggerhead nesting beaches at Maio Island, with three sand colorations (‘beach type’), to assess: 1) the density and size of ghost crab burrows, as a proxy for ghost crab density and size, and 2) ghost crab predation on 70 loggerhead nests. We further assessed nest site selection, by considering the number of nesting activities and clutches laid across beach type. There were no evident trends in the distributions of ghost crab density and size between years or beach type. We found that ghost crab predation is a major source of mortality in Maio Island, affecting 67.8% (n = 59) of the nests. Ghost crab predation was variable between beaches, but generally, at the warmer dark sand beaches, clutch mortality was mostly caused by ghost crab predation (53.2%, n = 17), while at the mixed sand beaches mortality by predation was low (7.5%, n = 18), compared to mortality due to other causes (49.9%), indicating that other factors can also significantly impact clutch survival. The mixed sand beaches had more nesting activities and higher nest density (2.29/m2; 1.25/m2, respectively), compared to the light sand (0.72/m2; 0.35/m2) and the dark sand beaches (0.73/m2; 0.27/m2), suggesting a possible predation-free nesting preference. Our findings show that some beaches are in need of nest protection, thus we recommend both in situ nest protection and egg translocation to safe hatcheries, depending on the threats identified, to enhance clutch survival at such ... Article in Journal/Newspaper Northeast Atlantic Instituto Universitário de Ciências Psicológicas, Sociais e da Vida: Repositório do ISPA Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) Journal of Experimental Marine Biology and Ecology 551 151735 |
institution |
Open Polar |
collection |
Instituto Universitário de Ciências Psicológicas, Sociais e da Vida: Repositório do ISPA |
op_collection_id |
ftispalisboa |
language |
English |
topic |
Caretta caretta Clutch mortality Thermal habitats Ghost crab predation Sea turtles Cabo Verde |
spellingShingle |
Caretta caretta Clutch mortality Thermal habitats Ghost crab predation Sea turtles Cabo Verde Martins, Rita Marco, Adolfo Patino, Juan Camilo Yeoman, Kate Vinagre, Catarina Patrício, Ana Rita Ghost crab predation of loggerhead turtle eggs across thermal habitats |
topic_facet |
Caretta caretta Clutch mortality Thermal habitats Ghost crab predation Sea turtles Cabo Verde |
description |
The reproductive success of sea turtles is highly influenced by the environmental and biological conditions of the nesting beach. Maio Island, Cabo Verde, one of the main nesting sites for the Northeast Atlantic loggerhead subpopulation, displays marked heterogeneity of sand coloration, with dark, mixed and light sandy beaches, resulting in different thermal habitats. Considering that sand temperature can influence both sea turtle embryo development and predatory activity by ghost crabs – the main predators of clutches and hatchlings at Cabo Verde – we surveyed loggerhead nesting beaches at Maio Island, with three sand colorations (‘beach type’), to assess: 1) the density and size of ghost crab burrows, as a proxy for ghost crab density and size, and 2) ghost crab predation on 70 loggerhead nests. We further assessed nest site selection, by considering the number of nesting activities and clutches laid across beach type. There were no evident trends in the distributions of ghost crab density and size between years or beach type. We found that ghost crab predation is a major source of mortality in Maio Island, affecting 67.8% (n = 59) of the nests. Ghost crab predation was variable between beaches, but generally, at the warmer dark sand beaches, clutch mortality was mostly caused by ghost crab predation (53.2%, n = 17), while at the mixed sand beaches mortality by predation was low (7.5%, n = 18), compared to mortality due to other causes (49.9%), indicating that other factors can also significantly impact clutch survival. The mixed sand beaches had more nesting activities and higher nest density (2.29/m2; 1.25/m2, respectively), compared to the light sand (0.72/m2; 0.35/m2) and the dark sand beaches (0.73/m2; 0.27/m2), suggesting a possible predation-free nesting preference. Our findings show that some beaches are in need of nest protection, thus we recommend both in situ nest protection and egg translocation to safe hatcheries, depending on the threats identified, to enhance clutch survival at such ... |
format |
Article in Journal/Newspaper |
author |
Martins, Rita Marco, Adolfo Patino, Juan Camilo Yeoman, Kate Vinagre, Catarina Patrício, Ana Rita |
author_facet |
Martins, Rita Marco, Adolfo Patino, Juan Camilo Yeoman, Kate Vinagre, Catarina Patrício, Ana Rita |
author_sort |
Martins, Rita |
title |
Ghost crab predation of loggerhead turtle eggs across thermal habitats |
title_short |
Ghost crab predation of loggerhead turtle eggs across thermal habitats |
title_full |
Ghost crab predation of loggerhead turtle eggs across thermal habitats |
title_fullStr |
Ghost crab predation of loggerhead turtle eggs across thermal habitats |
title_full_unstemmed |
Ghost crab predation of loggerhead turtle eggs across thermal habitats |
title_sort |
ghost crab predation of loggerhead turtle eggs across thermal habitats |
publisher |
Elsevier |
publishDate |
2022 |
url |
http://hdl.handle.net/10400.12/8654 https://doi.org/10.1016/j.jembe.2022.151735 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) |
geographic |
Burrows |
geographic_facet |
Burrows |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04292%2F2020/PT info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT Martins, R., Marco, A., Patino-Martinez, J., Yeoman, K., Vinagre, C., & Patrício, A. R. (2022). Ghost crab predation of loggerhead turtle eggs across thermal habitats. Journal of Experimental Marine Biology and Ecology, 551. https://doi.org/10.1016/j.jembe.2022.151735 22967745 http://hdl.handle.net/10400.12/8654 doi:10.1016/j.jembe.2022.151735 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.jembe.2022.151735 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
551 |
container_start_page |
151735 |
_version_ |
1766143481531596800 |