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Field lethal incubation temperature of olive ridley sea turtle Lepidochelys olivacea embryos at a mass nesting rookery
| Content Provider | Semantic Scholar |
|---|---|
| Author | Valverde, Roldán A. Wingard, S. A. Gómez, Flor M. Tordoir, Mark T. Orrego, Carlos Mario |
| Copyright Year | 2010 |
| Abstract | Hatching success in olive ridley mass nesting arribada beaches is typically low. We con- ducted a short study to understand whether incubation temperature in dry months accounts for exceedingly low hatching success at Ostional Beach, Costa Rica, a mass nesting rookery. We mea- sured in situ incubation temperatures in nests from 4 arribadas recorded in October to December 2008, and January 2009. Mean incubation temperatures for all months exceeded the upper lethal limit of 35°C, and no nests produced hatchlings when incubated at this or higher temperatures. Embryo development was inversely related to mean incubation temperature. Hatching success was low (2%) for the study period, and only 5 of 37 marked nests produced hatchlings. Mean incubation temperature for successful nests was <35°C. Since incubation temperatures of 32°C and higher recorded during the gonadal thermosensitive period were above the mean pivotal temperature of 30.5°C, the few hatchlings produced were presumably female. Incubation temperatures were signif- icantly higher during the second and third trimesters of incubation during all months as a result of metabolic heating. However, during January to March when embryos did not develop, higher incu- bation temperatures of in situ nests relative to controls indicated that heating was a result of micro- bial activity associated with egg decomposition. Our study demonstrates that after the onset of the dry season, incubation temperatures at this beach become lethal. |
| Starting Page | 77 |
| Ending Page | 86 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.3354/esr00296 |
| Volume Number | 12 |
| Alternate Webpage(s) | http://static1.1.sqspcdn.com/static/f/429452/24199840/1389625148933/Valverde+etal+2010+Field+lethal+incubation+ridleys1.pdf?token=DZs6aIM8cXQyXoNpzSH/wOC5PwM%3D |
| Alternate Webpage(s) | http://www2.southeastern.edu/Academics/Faculty/rvalverde/Valverde%20etal%202010%20Field%20lethal%20incubation%20ridleys.pdf |
| Alternate Webpage(s) | http://southeastern.edu/acad_research/depts/biol/faculty/publications/pdf/2010/valverde_et_al_2010.pdf |
| Alternate Webpage(s) | https://doi.org/10.3354/esr00296 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
