High beach temperatures increased female-biased primary sex ratios but reduced output of female hatchlings in the leatherback turtle
Sex of offspring in most turtles is determined by temperature-dependent sex determination (TSD). In sea turtles, higher incubation temperatures produce female hatchlings and primary sex ratios are often highly female-biased. Because of the current rate of climate warming, highly female-biased sex ra...
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| Veröffentlicht in: | Biological conservation 2014-08, Vol.176, p.71-79 |
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| creator | Santidrián Tomillo, Pilar Oro, Daniel Paladino, Frank V. Piedra, Rotney Sieg, Annette E. Spotila, James R. |
| description | Sex of offspring in most turtles is determined by temperature-dependent sex determination (TSD). In sea turtles, higher incubation temperatures produce female hatchlings and primary sex ratios are often highly female-biased. Because of the current rate of climate warming, highly female-biased sex ratios have raised concern among scientists and managers because populations might become too female biased for genetic viability.
We tested the effects of higher incubation temperatures on embryo and hatchling mortality and on sex ratios in a population of leatherback turtles (Dermochelys coriacea) in the eastern Pacific. The long-term study provided a large sample size in a location influenced by El Niño Southern Oscillation that resulted in highly variable climatic conditions between seasons. High temperatures reduced emergence success. Output of female hatchlings increased with incubation temperature as it reached the upper end of the transitional range (range of temperatures that produce both sexes) (30°C) and decreased afterwards because high temperatures increased mortality of ‘female clutches’. Effect of temperature on female hatchling output lessened female-biased sex ratios from 85% female primary sex ratios to 79% secondary sex ratios (sex ratios of total number of hatchlings emerged). If male turtles reproduce more often than females, operational sex ratios will be closer to 1:1. Female-biased primary sex ratios should not raise concerns by default, but climate change may still threaten populations by reducing hatchling output and increasing frequency of seasons with 100% female production. Clutch relocation to cooler conditions may alter sex ratios and should be used cautiously unless temperatures are so high that no hatchlings survive. In addition, it is unknown what differential survival of male versus female hatchlings may have on the eventual adult sex ratio after they enter the ocean and disperse. |
| doi_str_mv | 10.1016/j.biocon.2014.05.011 |
| format | Article |
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We tested the effects of higher incubation temperatures on embryo and hatchling mortality and on sex ratios in a population of leatherback turtles (Dermochelys coriacea) in the eastern Pacific. The long-term study provided a large sample size in a location influenced by El Niño Southern Oscillation that resulted in highly variable climatic conditions between seasons. High temperatures reduced emergence success. Output of female hatchlings increased with incubation temperature as it reached the upper end of the transitional range (range of temperatures that produce both sexes) (30°C) and decreased afterwards because high temperatures increased mortality of ‘female clutches’. Effect of temperature on female hatchling output lessened female-biased sex ratios from 85% female primary sex ratios to 79% secondary sex ratios (sex ratios of total number of hatchlings emerged). If male turtles reproduce more often than females, operational sex ratios will be closer to 1:1. Female-biased primary sex ratios should not raise concerns by default, but climate change may still threaten populations by reducing hatchling output and increasing frequency of seasons with 100% female production. Clutch relocation to cooler conditions may alter sex ratios and should be used cautiously unless temperatures are so high that no hatchlings survive. In addition, it is unknown what differential survival of male versus female hatchlings may have on the eventual adult sex ratio after they enter the ocean and disperse.</description><identifier>ISSN: 0006-3207</identifier><identifier>EISSN: 1873-2917</identifier><identifier>DOI: 10.1016/j.biocon.2014.05.011</identifier><identifier>CODEN: BICOBK</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Amphibia. Reptilia ; Animal, plant and microbial ecology ; Applied ecology ; Biological and medical sciences ; Climate change ; Climatology. Bioclimatology. Climate change ; Clutches ; Conservation, protection and management of environment and wildlife ; Costa Rica ; Dermochelys coriacea ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Females ; Fundamental and applied biological sciences. Psychology ; General aspects ; Males ; Meteorology ; Mortality ; Parks, reserves, wildlife conservation. Endangered species: population survey and restocking ; Playa Grande ; Populations ; Sea turtles ; Seasons ; Sex ; Sex determination ; TSD ; Turtles ; Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</subject><ispartof>Biological conservation, 2014-08, Vol.176, p.71-79</ispartof><rights>2014 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c468t-fe6448186c4e08392e88ecd17f1ab3bdabad383f7e9c6ba676db6f891e34eca43</citedby><cites>FETCH-LOGICAL-c468t-fe6448186c4e08392e88ecd17f1ab3bdabad383f7e9c6ba676db6f891e34eca43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.biocon.2014.05.011$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28641177$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Santidrián Tomillo, Pilar</creatorcontrib><creatorcontrib>Oro, Daniel</creatorcontrib><creatorcontrib>Paladino, Frank V.</creatorcontrib><creatorcontrib>Piedra, Rotney</creatorcontrib><creatorcontrib>Sieg, Annette E.</creatorcontrib><creatorcontrib>Spotila, James R.</creatorcontrib><title>High beach temperatures increased female-biased primary sex ratios but reduced output of female hatchlings in the leatherback turtle</title><title>Biological conservation</title><description>Sex of offspring in most turtles is determined by temperature-dependent sex determination (TSD). In sea turtles, higher incubation temperatures produce female hatchlings and primary sex ratios are often highly female-biased. Because of the current rate of climate warming, highly female-biased sex ratios have raised concern among scientists and managers because populations might become too female biased for genetic viability.
We tested the effects of higher incubation temperatures on embryo and hatchling mortality and on sex ratios in a population of leatherback turtles (Dermochelys coriacea) in the eastern Pacific. The long-term study provided a large sample size in a location influenced by El Niño Southern Oscillation that resulted in highly variable climatic conditions between seasons. High temperatures reduced emergence success. Output of female hatchlings increased with incubation temperature as it reached the upper end of the transitional range (range of temperatures that produce both sexes) (30°C) and decreased afterwards because high temperatures increased mortality of ‘female clutches’. Effect of temperature on female hatchling output lessened female-biased sex ratios from 85% female primary sex ratios to 79% secondary sex ratios (sex ratios of total number of hatchlings emerged). If male turtles reproduce more often than females, operational sex ratios will be closer to 1:1. Female-biased primary sex ratios should not raise concerns by default, but climate change may still threaten populations by reducing hatchling output and increasing frequency of seasons with 100% female production. Clutch relocation to cooler conditions may alter sex ratios and should be used cautiously unless temperatures are so high that no hatchlings survive. In addition, it is unknown what differential survival of male versus female hatchlings may have on the eventual adult sex ratio after they enter the ocean and disperse.</description><subject>Amphibia. Reptilia</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Biological and medical sciences</subject><subject>Climate change</subject><subject>Climatology. Bioclimatology. Climate change</subject><subject>Clutches</subject><subject>Conservation, protection and management of environment and wildlife</subject><subject>Costa Rica</subject><subject>Dermochelys coriacea</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Females</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects</subject><subject>Males</subject><subject>Meteorology</subject><subject>Mortality</subject><subject>Parks, reserves, wildlife conservation. Endangered species: population survey and restocking</subject><subject>Playa Grande</subject><subject>Populations</subject><subject>Sea turtles</subject><subject>Seasons</subject><subject>Sex</subject><subject>Sex determination</subject><subject>TSD</subject><subject>Turtles</subject><subject>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</subject><issn>0006-3207</issn><issn>1873-2917</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkU-LFDEQxYMoOK77DfaQi-Cle_NvkvRFkMV1hQUv6zkk6cp2xp7OmKTFvfvBzTiDx8VT8ajfq4L3ELqipKeEyutd72LyaekZoaIn255Q-gJtqFa8YwNVL9GGECI7zoh6jd6UsmtScbndoN938XHCDqyfcIX9AbKta4aC4-Iz2AIjDrC3M3Qu_lWHHPc2P-ECv3BjYyrYrRVnGFff1mmthyZTONvwZKuf5rg8Hk_iOgGewbaRnfXfcftVZ3iLXgU7F7g8zwv07fbTw81dd__185ebj_edF1LXLoAUQlMtvQCi-cBAa_AjVYFax91onR255kHB4KWzUsnRyaAHClyAt4JfoPenu4ecfqxQqtnH4mGe7QJpLYZKwZhiSrH_QJkaJGupNlScUJ9TKRmCOWdkKDHHfszOnPoxx34M2ZrWT7O9O3-wxds5ZLv4WP55mZaCUqUa9-HEQUvmZ4Rsio-wtLBjBl_NmOLzj_4AUaqq8Q</recordid><startdate>20140801</startdate><enddate>20140801</enddate><creator>Santidrián Tomillo, Pilar</creator><creator>Oro, Daniel</creator><creator>Paladino, Frank V.</creator><creator>Piedra, Rotney</creator><creator>Sieg, Annette E.</creator><creator>Spotila, James R.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7ST</scope><scope>7TN</scope><scope>7U6</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>20140801</creationdate><title>High beach temperatures increased female-biased primary sex ratios but reduced output of female hatchlings in the leatherback turtle</title><author>Santidrián Tomillo, Pilar ; Oro, Daniel ; Paladino, Frank V. ; Piedra, Rotney ; Sieg, Annette E. ; Spotila, James R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c468t-fe6448186c4e08392e88ecd17f1ab3bdabad383f7e9c6ba676db6f891e34eca43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Amphibia. Reptilia</topic><topic>Animal, plant and microbial ecology</topic><topic>Applied ecology</topic><topic>Biological and medical sciences</topic><topic>Climate change</topic><topic>Climatology. Bioclimatology. Climate change</topic><topic>Clutches</topic><topic>Conservation, protection and management of environment and wildlife</topic><topic>Costa Rica</topic><topic>Dermochelys coriacea</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Females</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General aspects</topic><topic>Males</topic><topic>Meteorology</topic><topic>Mortality</topic><topic>Parks, reserves, wildlife conservation. Endangered species: population survey and restocking</topic><topic>Playa Grande</topic><topic>Populations</topic><topic>Sea turtles</topic><topic>Seasons</topic><topic>Sex</topic><topic>Sex determination</topic><topic>TSD</topic><topic>Turtles</topic><topic>Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Santidrián Tomillo, Pilar</creatorcontrib><creatorcontrib>Oro, Daniel</creatorcontrib><creatorcontrib>Paladino, Frank V.</creatorcontrib><creatorcontrib>Piedra, Rotney</creatorcontrib><creatorcontrib>Sieg, Annette E.</creatorcontrib><creatorcontrib>Spotila, James R.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Sustainability Science Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Biological conservation</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Santidrián Tomillo, Pilar</au><au>Oro, Daniel</au><au>Paladino, Frank V.</au><au>Piedra, Rotney</au><au>Sieg, Annette E.</au><au>Spotila, James R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High beach temperatures increased female-biased primary sex ratios but reduced output of female hatchlings in the leatherback turtle</atitle><jtitle>Biological conservation</jtitle><date>2014-08-01</date><risdate>2014</risdate><volume>176</volume><spage>71</spage><epage>79</epage><pages>71-79</pages><issn>0006-3207</issn><eissn>1873-2917</eissn><coden>BICOBK</coden><abstract>Sex of offspring in most turtles is determined by temperature-dependent sex determination (TSD). In sea turtles, higher incubation temperatures produce female hatchlings and primary sex ratios are often highly female-biased. Because of the current rate of climate warming, highly female-biased sex ratios have raised concern among scientists and managers because populations might become too female biased for genetic viability.
We tested the effects of higher incubation temperatures on embryo and hatchling mortality and on sex ratios in a population of leatherback turtles (Dermochelys coriacea) in the eastern Pacific. The long-term study provided a large sample size in a location influenced by El Niño Southern Oscillation that resulted in highly variable climatic conditions between seasons. High temperatures reduced emergence success. Output of female hatchlings increased with incubation temperature as it reached the upper end of the transitional range (range of temperatures that produce both sexes) (30°C) and decreased afterwards because high temperatures increased mortality of ‘female clutches’. Effect of temperature on female hatchling output lessened female-biased sex ratios from 85% female primary sex ratios to 79% secondary sex ratios (sex ratios of total number of hatchlings emerged). If male turtles reproduce more often than females, operational sex ratios will be closer to 1:1. Female-biased primary sex ratios should not raise concerns by default, but climate change may still threaten populations by reducing hatchling output and increasing frequency of seasons with 100% female production. Clutch relocation to cooler conditions may alter sex ratios and should be used cautiously unless temperatures are so high that no hatchlings survive. In addition, it is unknown what differential survival of male versus female hatchlings may have on the eventual adult sex ratio after they enter the ocean and disperse.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.biocon.2014.05.011</doi><tpages>9</tpages></addata></record> |
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| subjects | Amphibia. Reptilia Animal, plant and microbial ecology Applied ecology Biological and medical sciences Climate change Climatology. Bioclimatology. Climate change Clutches Conservation, protection and management of environment and wildlife Costa Rica Dermochelys coriacea Earth, ocean, space Exact sciences and technology External geophysics Females Fundamental and applied biological sciences. Psychology General aspects Males Meteorology Mortality Parks, reserves, wildlife conservation. Endangered species: population survey and restocking Playa Grande Populations Sea turtles Seasons Sex Sex determination TSD Turtles Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution |
| title | High beach temperatures increased female-biased primary sex ratios but reduced output of female hatchlings in the leatherback turtle |
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