scholarly journals Beach erosion and nest site selection by the leatherback sea turtle Dermochelys coriacea (Testudines: Dermochelyidae) and implications for management practices at Playa Gandoca, Costa Rica

2009 ◽  
Vol 58 (4) ◽  
Author(s):  
Matthew J. Spanier
Keyword(s):  
Costa Rica ◽  
Site Selection ◽  
Management Practices ◽  
Nest Site ◽  
Sea Turtle ◽  
Nest Site Selection ◽  
Beach Erosion ◽  
Dermochelys Coriacea ◽  
Leatherback Sea Turtle

Nesting ecology of flatback sea turtles Natator depressus from Delambre Island, Western Australia

2020 ◽  
Vol 71 (4) ◽  
pp. 443 ◽  
Author(s):  
Michele Thums ◽  
Jason Rossendell ◽  
Rebecca Fisher ◽  
Michael L. Guinea
Keyword(s):  
Western Australia ◽  
Site Selection ◽  
Nest Site ◽  
Sea Turtle ◽  
Nest Site Selection ◽  
Coastal Development ◽  
Environmental Drivers ◽  
Nesting Ecology ◽  
Using Data ◽  
Natator Depressus

Nest site selection is likely to be important for the fitness of sea turtle populations, but data on the environmental drivers of nest site selection and other important parameters like nest site fidelity and inter-nesting and remigration intervals are limited. We address these questions using data on flipper tag resightings and track counts from flatback turtles (Natator depressus) from Delambre Island in Western Australia collected over 2–3 weeks each nesting season across six nesting seasons. The median inter-nesting interval was 13 days (range 9–17 days) and the mean±s.d. remigration interval was 1.99±0.95 years. Turtles had around 10% probability of returning to the same sector of the beach (150-m-long sections). The median distance between subsequent emergences (whether false crawls were included or not) was ~450m. The number of turtles both emerging and successfully nesting was higher when air temperature and humidity were lowest and emergences increased slightly with tide height. Sector of the beach was by far the strongest predictor of nest site, with turtles showing preference for the less exposed side of the island. The results of this study will assist with future monitoring of this population and the management of threats related to coastal development and activities.

Nest-Site Selection by the Loggerhead Sea Turtle in Florida's Ten Thousand Islands

2000 ◽  
Vol 34 (4) ◽  
pp. 504 ◽  
Author(s):  
Ahjond S. Garmestani ◽  
H. Franklin Percival ◽  
Kenneth M. Portier ◽  
Kenneth G. Rice
Keyword(s):  
Site Selection ◽  
Nest Site ◽  
Sea Turtle ◽  
Nest Site Selection ◽  
Loggerhead Sea Turtle ◽  
Thousand Islands

scholarly journals Large-scale investment in the excavation and “camouflaging” phases by nesting Leatherback Turtles (Dermochelys coriacea)

2016 ◽  
Vol 94 (6) ◽  
pp. 443-448 ◽  
Author(s):  
Thomas J. Burns ◽  
Hannah Davidson ◽  
Malcolm W. Kennedy
Keyword(s):  
Oxygen Consumption ◽  
Site Selection ◽  
Large Scale ◽  
Nest Site ◽  
Physiological Stress ◽  
Nest Site Selection ◽  
Dermochelys Coriacea ◽  
Leatherback Turtles ◽  
Scattering Phase ◽  
Nesting Season

Nesting female Leatherback Turtles (Dermochelys coriacea (Vandelli, 1761)) are ungainly and vulnerable to predation, stranding, and physiological stress, dangers encountered repeatedly in a nesting season. Minimising these risks must be balanced against optimising investment in nest-site selection, excavation, refilling, and concealment of their egg clutches. We investigated the relative investment in the different phases of nesting in Leatherback Turtles by recording the duration of, and respiratory frequency during, each phase. Nest excavation and the final sand scattering (usually termed “camouflage” or “disguise”) phases were the longest in duration. By combining the relative durations of nesting phases with literature estimates of oxygen consumption, we found that these may be the most expensive phases energetically, sand scattering in particular. Leatherback Turtles follow convoluted paths during the sand scattering phase, which were mapped and measured. They disturb large areas (mean (±SD) 30.3 ± 11.1 m2, maximum 57 m2), the centroids of which were always offset from the nest itself. Interestingly, in none of 26 nestings observed did the centre line of females move over the nest itself. Nesting Leatherbacks therefore invest heavily in obscuring the egg clutch, and the pattern of their movements in doing so suggests decoy behaviour.

scholarly journals Nest site selection and nesting behavior of the mud turtle Kinosternon scorpiodes (Testudines, Kinosternidae) in Palo Verde National Park, Costa Rica: implications for management

2021 ◽  
Vol 16 (2) ◽  
pp. 273-287
Author(s):  
José M. Mora ◽  
Franklin E. Castañeda
Keyword(s):  
Costa Rica ◽  
Leaf Litter ◽  
Site Selection ◽  
National Park ◽  
Nest Site ◽  
Cattle Grazing ◽  
Nest Site Selection ◽  
Litter Cover ◽  
Mud Turtle ◽  
Palo Verde National Park

Habitat selection is the process whereby individuals preferentially use, or occupy, a non-random set of available habitats. At the same time, nest site selection is defined as the placement of eggs by females at sites differing from random sites within a delimited area. We located 59 nests of the mud turtle Kinosternon scorpioides in Palo Verde National Park (PVNP) in Northwestern Costa Rica. We compared eight microhabitat variables at nest sites against those at random sites. Females significantly placed their eggs at sites with more understory, leaf litter cover, and greater leaf litter depth than in random sites. Additionally, females selected sites with lower air and soil temperature and lower air humidity. Palo Verde NP is subject to active management actions designed to control invasive plant species in the wetland, namely cattail (Thypha domingensis Pers.). The main actions have been cattle grazing, controlled fires, and mechanical crushing of vegetation. We found that habitat quality in nesting areas is being threatened by at least one of these actions: cattle grazing. This is detrimental for three microhabitat traits that turtles select for nesting sites: understory cover, leaf litter cover, and leaf litter depth. The continued degradation of microhabitats at nesting areas of K. scorpioides at PVNP could be affecting recruitment due to embryo survivorship.

Impact of 2020 COVID-19 lockdown on environmental education and leatherback sea turtle (Dermochelys coriacea) nesting monitoring in Pacuare Reserve, Costa Rica

2021 ◽  
Vol 255 ◽  
pp. 108981
Author(s):  
Claudio Quesada-Rodríguez ◽  
Catherine Orientale ◽  
Jessica Diaz-Orozco ◽  
Bárbara Sellés-Ríos
Keyword(s):  
Costa Rica ◽  
Environmental Education ◽  
Sea Turtle ◽  
Dermochelys Coriacea ◽  
Leatherback Sea Turtle

scholarly journals Commentary: Brightness of the Night Sky Affects Loggerhead (Caretta caretta) Sea Turtle Hatchling Misorientation but Not Nest Site Selection

2020 ◽  
Vol 7 ◽  
Author(s):  
Travis Longcore ◽  
Dan Duriscoe ◽  
Martin Aubé ◽  
Andreas Jechow ◽  
Christopher C. M. Kyba ◽  
...  
Keyword(s):  
Site Selection ◽  
Nest Site ◽  
Caretta Caretta ◽  
Sea Turtle ◽  
Nest Site Selection ◽  
Night Sky

VIEWING HABITAT THROUGH ANOTHER LENS: BIRD NEST-SITE SELECTION AND PRODUCTIVITY ACROSS A BEACH THERMAL LANDSCAPE

2019 ◽  
Author(s):  
Lauren Schaale ◽  
◽  
Joseph Baxley ◽  
Narcisa Pricope ◽  
Raymond M. Danner
Keyword(s):  
Site Selection ◽  
Nest Site ◽  
Nest Site Selection ◽  
Bird Nest
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