Nest site fidelity and clutch frequency of loggerhead turtles are better elucidated by satellite telemetry than by nocturnal tagging efforts: Implications for stock estimation

Tucker, Anton D.

doi:10.1016/j.jembe.2009.11.009

Cited by 130 publications

(111 citation statements)

References 38 publications

Supporting

Mentioning

108

Contrasting

Order By: Relevance

“…1). Tucker (2010) demonstrated by satellite telemetry that actual clutch frequency and nest site fidelity are higher than the same values obtained by beach tagging efforts for loggerhead turtles. Increase in tagging effort in adjacent areas, coupled with satellite tagging, will enhance detection of realistic clutch frequencies and the range of nest site fidelity.…”

Section: Internesting Interval and Clutch Frequencymentioning

confidence: 71%

Northeast Brazil shows highest hawksbill turtle nesting density in the South Atlantic

Santos¹,

Bellini²,

Vieira³

et al. 2013

Endang. Species. Res.

View full text Add to dashboard Cite

To date, hawksbill turtle Eretmochelys imbricata nesting in Brazil has been estimated by recording clutch numbers. To better address conservation assessments and more reliably estimate the number of females, the Projeto TAMAR-ICMBio initiated a mark and recapture program of nesting females to gather data on critical parameters such as clutch frequency and remigration interval. The study area on the southern coast of Rio Grande do Norte was divided into 2 data-recording efforts: index (IA) and protected (PA) areas. Overall, 243 nesting hawksbill turtles were tagged along 42 km of nesting beach; 153 of these were within the 4 km area of intensive tagging. We estimated a remigration interval of 2.1 yr and a clutch frequency of between 2.3 and 2.6 clutches per female. Furthermore, the number of active breeding females was estimated to be between 705 and 791. The average number of clutches per kilometer was 21.1 in the IA and 20.7 in the PA (although some sections were as high as 37.5 and 48.5 nests km −1 , respectively). This represents the highest density of hawksbill clutches per kilometer found so far for the South Atlantic, and highlights the importance of southern Rio Grande do Norte for the conservation of the Critically Endangered hawksbill turtle. KEY WORDS: Brazil · Clutch frequency · Conservation · Eretmochelys imbricata · Remigration intervalResale or republication not permitted without written consent of the publisher

show abstract

Section: Internesting Interval and Clutch Frequencymentioning

confidence: 71%

Northeast Brazil shows highest hawksbill turtle nesting density in the South Atlantic

Santos¹,

Bellini²,

Vieira³

et al. 2013

Endang. Species. Res.

View full text Add to dashboard Cite

show abstract

“…But detectability could be lower for neophytes if those females have low nest site fidelity as they recruit into the adult population, i.e. some neophytes nest at other rookeries in the Hawaiian Islands, and then nest at East Island subsequently (Limpus et al 2003, Tucker 2010. At least 95 individuals are recorded as nesting at East Island and other outlying islands in the NWHI at some time, corresponding to a 3% rate of 'infidelity' (Pacific Islands Fisheries Science Center unpublished reports).…”

Section: Temporal Variability Of Demographic Indicatorsmentioning

confidence: 99%

Trends and variability in demographic indicators of a recovering population of green sea turtles Chelonia mydas

Piacenza¹,

Balazs²,

Hargrove³

et al. 2016

Endang. Species. Res.

View full text Add to dashboard Cite

Multiple populations of green sea turtles Chelonia mydas show signs of population recovery. In Hawaii (USA), green turtles have increased 5.4% yr −1 since 1973, but fluctuations in census counts of nesting females make recovery diagnosis difficult. Evaluating demographic rates for temporal change and in relation to population density, and indicators of recruitment to sea turtle nesting populations, will ultimately improve population assessments. Using linear mixed and multistate open robust design models, we estimated the demographic indicators (DIs) of size at maturity, nester carapace length, breeding probability, and adult female survival using 3677 tagged nesting green turtles from 1973 to 2010 in Hawaii. To evaluate changes with density, we correlated the DIs with nesting female counts. We estimated size at maturity, assuming that newly tagged nesters are new recruits and that first-time nesters have statistically significant smaller carapace length than recaptures, but the difference in size was only ~0.5 cm. Mean nester carapace length (range: 89.21−91.69 cm) and breeding probability (range: 0.0766−0.444 yr −1 ) showed directional changes over time, suggesting shifts in age structure that could be due to recruitment. The top-ranked model predicted constant female survival over time (S = 0.929 yr −1 , 95% CI: 0.924−0.933, model likelihood = 1.00). Counter to our hypothesis based on density-dependence, breeding probability increases with increasing nester abundance. This work contributes to a growing set of studies evaluating sea turtle demography for temporal variability and is the first for Hawaiian green turtles. Our study demonstrates that some easily monitored demographic variables may serve as indicators of population change.

show abstract

“…The annual mating season for loggerhead sea turtles occurs from late March to early June, and female turtles lay eggs throughout the summer months. Female loggerheads deposit an average of 4.1 nests within a nesting season (Murphy and Hopkins 1984) but an individual female only nests every 3.7 years on average (Tucker 2010). Along the southeastern United States, loggerheads lay an average of 100 to 126 eggs per nest (Dodd 1988) which incubate for 42 to 75 days before hatching (NMFS and USFWS 2008b).…”

Section: Life History Informationmentioning

confidence: 99%

Kemp's Ridley Sea Turtle Saga and Setback: Novel Analyses of Cumulative Hatchlings Released and Time-Lagged Annual Nests in Tamaulipas, Mexico

Caillouet¹,

Gallaway

Putman

2016

Chelonian Conservation and Biology

View full text Add to dashboard Cite

Nest site fidelity and clutch frequency of loggerhead turtles are better elucidated by satellite telemetry than by nocturnal tagging efforts: Implications for stock estimation

Cited by 130 publications

References 38 publications

Northeast Brazil shows highest hawksbill turtle nesting density in the South Atlantic

Northeast Brazil shows highest hawksbill turtle nesting density in the South Atlantic

Trends and variability in demographic indicators of a recovering population of green sea turtles Chelonia mydas

Kemp's Ridley Sea Turtle Saga and Setback: Novel Analyses of Cumulative Hatchlings Released and Time-Lagged Annual Nests in Tamaulipas, Mexico

Contact Info

Product

Resources

About