Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant
Loggerheads (Caretta caretta) are listed as Threatened and green turtles (Chelonia mydas) are listed as Endangered under the United States Endangered Species Act. While green turtle nest production in Florida has increased markedly in recent years, loggerhead nest production has followed a more tenu...
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ftucentralflordl:oai:ucf.digital.flvc.org:ucf_49770 2023-11-12T04:18:20+01:00 Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant Sterner, Andrew (Author) Weishampel, John (Committee Chair) Ehrhart, Llewellyn (Committee CoChair) Walters, Linda (Committee Member) Breininger, David (Committee Member) (Committee Member) University of Central Florida (Degree Grantor) http://purl.flvc.org/ucf/fd/CFE0004755 English eng University of Central Florida CFE0004755 ucf:49770 http://purl.flvc.org/ucf/fd/CFE0004755 public 2013-05-15 Green turtles--Loggerheads--Mark-recapture--Barker Models--Survivorship--Demography Text ftucentralflordl 2023-10-24T16:36:28Z Loggerheads (Caretta caretta) are listed as Threatened and green turtles (Chelonia mydas) are listed as Endangered under the United States Endangered Species Act. While green turtle nest production in Florida has increased markedly in recent years, loggerhead nest production has followed a more tenuous path. Reasons for these differences are unknown. Limited demographic information is available for these species of conservation concern. I used Barker models, which incorporated mark-recapture, live-resight and dead recovery data, implemented in Program MARK. These models were used to estimate apparent survival for immature loggerhead ((<)85cm SCL) and green turtle ((<)60cm SCL) populations foraging in the Atlantic Ocean adjacent to the Florida Power and Light St. Lucie Plant on Hutchinson Island, Florida between 2002 and 2011. My results indicated annual apparent survival was decreasing (from 0.75 to 0.59) for resident immature loggerheads and was stable (~0.81) for resident immature green turtles over the ten year study period. I found that permanent emigration models were better supported than no movement models for both species. Size (straight carapace length) was found to be an important covariate for survival and fidelity parameters in the green turtle analysis but not in the loggerhead analysis. My study is the first to compare survival of two species of immature marine turtles foraging at the same location in the Atlantic. These estimates are also the first available survival estimates for immature marine turtle populations in Florida based on modern mark-recapture techniques, filling a critical knowledge gap. This information is vitally important for managers when evaluating the long-term recovery of these endangered species. 2013-05-01 M.S. Sciences, Biology Masters This record was generated from author submitted information. Text Hutchinson Island UCF Digital Collections (University of Central Florida) Hutchinson Island ENVELOPE(-101.898,-101.898,59.248,59.248) |
institution |
Open Polar |
collection |
UCF Digital Collections (University of Central Florida) |
op_collection_id |
ftucentralflordl |
language |
English |
topic |
Green turtles--Loggerheads--Mark-recapture--Barker Models--Survivorship--Demography |
spellingShingle |
Green turtles--Loggerheads--Mark-recapture--Barker Models--Survivorship--Demography Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant |
topic_facet |
Green turtles--Loggerheads--Mark-recapture--Barker Models--Survivorship--Demography |
description |
Loggerheads (Caretta caretta) are listed as Threatened and green turtles (Chelonia mydas) are listed as Endangered under the United States Endangered Species Act. While green turtle nest production in Florida has increased markedly in recent years, loggerhead nest production has followed a more tenuous path. Reasons for these differences are unknown. Limited demographic information is available for these species of conservation concern. I used Barker models, which incorporated mark-recapture, live-resight and dead recovery data, implemented in Program MARK. These models were used to estimate apparent survival for immature loggerhead ((<)85cm SCL) and green turtle ((<)60cm SCL) populations foraging in the Atlantic Ocean adjacent to the Florida Power and Light St. Lucie Plant on Hutchinson Island, Florida between 2002 and 2011. My results indicated annual apparent survival was decreasing (from 0.75 to 0.59) for resident immature loggerheads and was stable (~0.81) for resident immature green turtles over the ten year study period. I found that permanent emigration models were better supported than no movement models for both species. Size (straight carapace length) was found to be an important covariate for survival and fidelity parameters in the green turtle analysis but not in the loggerhead analysis. My study is the first to compare survival of two species of immature marine turtles foraging at the same location in the Atlantic. These estimates are also the first available survival estimates for immature marine turtle populations in Florida based on modern mark-recapture techniques, filling a critical knowledge gap. This information is vitally important for managers when evaluating the long-term recovery of these endangered species. 2013-05-01 M.S. Sciences, Biology Masters This record was generated from author submitted information. |
author2 |
Sterner, Andrew (Author) Weishampel, John (Committee Chair) Ehrhart, Llewellyn (Committee CoChair) Walters, Linda (Committee Member) Breininger, David (Committee Member) (Committee Member) University of Central Florida (Degree Grantor) |
format |
Text |
title |
Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant |
title_short |
Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant |
title_full |
Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant |
title_fullStr |
Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant |
title_full_unstemmed |
Modeling Survival of Immature Loggerheads (Caretta caretta) and Green Turtles (Chelonia mydas) from 10 Years of Mark-Recapture Data at the Florida Power and Light St. Lucie Plant |
title_sort |
modeling survival of immature loggerheads (caretta caretta) and green turtles (chelonia mydas) from 10 years of mark-recapture data at the florida power and light st. lucie plant |
publisher |
University of Central Florida |
url |
http://purl.flvc.org/ucf/fd/CFE0004755 |
long_lat |
ENVELOPE(-101.898,-101.898,59.248,59.248) |
geographic |
Hutchinson Island |
geographic_facet |
Hutchinson Island |
genre |
Hutchinson Island |
genre_facet |
Hutchinson Island |
op_relation |
CFE0004755 ucf:49770 http://purl.flvc.org/ucf/fd/CFE0004755 |
op_rights |
public 2013-05-15 |
_version_ |
1782334984292401152 |