Effects of Diving and Swimming Behavior on Body Temperatures of Pacific Leatherback Turtles in Tropical Seas

Southwood, Amanda; Andrews, Russel D.; Paladino, Frank V.; Jones, David R.

doi:10.1086/427048

Cited by 62 publications

(76 citation statements)

References 19 publications

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“…Because nesting at a tropical beach may be a source of thermal stress for females (Miller 1997), post-nesting individuals may spend more time at depth, where ambient water temperature is cooler. A similar result has been reported for leatherback turtles in Costa Rica (Southwood et al 2005). Alternatively, the energetic stress of nesting behavior may explain the observed difference.…”

Section: Discussionsupporting

confidence: 87%

“…Such studies may require recording internal and body-surface temperature (Boyd 2000, Southwood et al 2005, using 18 O doubly-labeled water (Costa & Gales 2000), and measuring locomotion of individuals (Williams et al 2004, Reina et al 2005.…”

Section: Discussionmentioning

confidence: 99%

“…Harnesses and tethers have been used to secure data recorders to leatherback turtles (Eckert & Eckert 1986, Eckert et al 1989, Morreale et al 1996, Eckert & Sarti 1997. Southwood et al (1999Southwood et al ( , 2005 attached instruments to female leatherback turtles with stainless steel wires, which were secured directly to the turtle by drilling holes on the carapace. More recently, Reina et al (2005) used suction cups to attach the housing for an integrated video/ADR on leatherback turtles.…”

Section: Introductionmentioning

confidence: 99%

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Flipper tagging with archival data recorders for short-term assessment of diving in nesting female turtles

Eguchi¹,

Seminoff²,

Garner³

et al. 2006

Endang. Species Res.

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Archival data recorders (ADRs) were deployed on nesting female leatherback turtles Dermochelys coriacea to record short-term diving behavior. Plastic cattle ear tags were used as a platform to which an archival depth recorder was attached. The tags were applied to the hind flippers of 10 turtles, ranging from 141.9 to 160.6 cm in curved carapace length at Sandy Point National Wildlife Refuge, St. Croix, US Virgin Islands. We later retrieved 7 of the original 10 tags at the beach; durations of deployment ranged from 22 to 90 h. The recorded number of dives per deployment ranged from 118 to 310. Maximum dive depths ranged from 175.6 to 479.7 m (mean 275.4, SE 41.7, n = 7), and maximum dive durations ranged from 16.3 to 27.8 min (mean 21.3, SE = 1.5, n = 7). Dive data indicated that post-nesting females dove deeper, less frequently, and longer than pre-nesting females -depth: mean post 78.6 m, 95% CI (56.0, 101.2) versus mean pre 45.4 m, 95% CI (37.1, 53.8); frequency: mean post 2.4 dives h -1 , 95% CI (1.8, 2.9) versus mean pre 5.4 dives h -1 , 95% CI (5.0, 5.8); duration: mean post 13.1 min, 95% CI (11.2, 15.1) versus mean pre 6.1 min, 95% CI (5.5, 6.6). A pre-nesting female was defined as one that attempted to nest but returned to the sea without laying eggs. This ADR deployment method provides a simpler and less intrusive alternative to other tag attachment methods, such as harness and tethers, when the research questions require only short deployment time of archival recorders.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flipper tagging with archival data recorders for short-term assessment of diving in nesting female turtles

Eguchi¹,

Seminoff²,

Garner³

et al. 2006

Endang. Species Res.

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“…For example, leatherbacks have a countercurrent circulatory system (Greer et al 1973), 12 a thick layer of insulating fat (Davenport et al 1990;Goff and Lien 1988), gigantothermy (Paladino et al 1990), 13 and they can increase their body temperature through increased metabolic activity (Bostrom and Jones 2007;Southwood et al 2005). These adaptations allow leatherbacks to be comfortable in a wide range of temperatures and to travel further than any other sea turtle species (NMFS and USFWS 1995).…”

Section: Species Description and Distributionmentioning

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

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“…Weishampel et al 2004, Mazaris et al 2008, Dalleau et al 2012. However, leatherback turtles are uniquely able among sea turtles to maintain elevated and constant body temperatures through a series of adaptations termed gigantothermy (Paladino et al 1990, Southwood et al 2005, Bostrom & Jones 2007. The effect of temperature on the nesting phenology of leatherback turtles may therefore be less distinct.…”

Section: Introductionmentioning

confidence: 99%

Multidecadal trends in the nesting phenology of Pacific and Atlantic leatherback turtles are associated with population demography

Robinson¹,

Valentine²,

Tomillo³

et al. 2014

Endang. Species. Res.

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Knowledge of the mechanisms influencing phenology can provide insights into the adaptability of species to climate change. Here, we investigated the factors influencing multidecadal trends in the nesting phenology of the leatherback turtle Dermochelys coriacea at Playa Grande, Costa Rica, in the eastern Pacific Ocean and at Sandy Point, US Virgin Islands, in the western Atlantic Ocean. Between 1993 and 2013, the median nesting date (MND) at Playa Grande occurred later, at a rate of ~0.3 d yr . The opposing trends in the MND of each population were not explained by variation in the multivariate El Niño-Southern Oscillation index, North Atlantic Oscillation index, or Atlantic Multidecadal Oscillation index; however, the MND at Playa Grande was significantly correlated with nesting population size. We propose that changes in demography, linked to the population decline at Playa Grande, and the population recovery at Sandy Point may explain the contrasting trends in MNDs. If the observed trends in MND continue into the future, the nesting season at Playa Grande will coincide with increasingly adverse conditions for hatching success, exacerbating the already detrimental effects of climate change. Alternatively, shifts in the nesting phenology may make the Atlantic populations more resilient to climate change. Our findings highlight the increasing need for conservation efforts for eastern Pacific leatherback turtles to consider climate change mitigation practices.

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Effects of Diving and Swimming Behavior on Body Temperatures of Pacific Leatherback Turtles in Tropical Seas

Cited by 62 publications

References 19 publications

Flipper tagging with archival data recorders for short-term assessment of diving in nesting female turtles

Flipper tagging with archival data recorders for short-term assessment of diving in nesting female turtles

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

Multidecadal trends in the nesting phenology of Pacific and Atlantic leatherback turtles are associated with population demography

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