Climate change and temperature-linked hatchling mortality at a globally important sea turtle nesting site

2017 ◽  
Vol 23 (11) ◽  
pp. 4922-4931 ◽  
Author(s):  
Jacques-Olivier Laloë ◽  
Jacquie Cozens ◽  
Berta Renom ◽  
Albert Taxonera ◽  
Graeme C. Hays
Keyword(s):  
Climate Change ◽  
Sea Turtle ◽  
Nesting Site

scholarly journals Sea turtles support sustainable livelihoods at Ostional, Costa Rica

Oryx ◽  
2018 ◽  
Vol 53 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Mallika Sardeshpande ◽  
Douglas MacMillan
Keyword(s):  
Costa Rica ◽  
Local Community ◽  
Sustainable Livelihoods ◽  
Household Survey ◽  
Sea Turtle ◽  
Environmental Conservation ◽  
Current Status ◽  
Structured Interviews ◽  
Olive Ridley ◽  
Nesting Site

AbstractOstional in Costa Rica is the second largest nesting site of the olive ridley sea turtle Lepidochelys olivacea, which is categorized as Vulnerable on the IUCN Red List. In Ostional the local community helps maintain the nesting site and collects olive ridley eggs for consumption and trade within Costa Rica. Since its inception in 1987 the egg harvesting project has integrated sea turtle conservation with community development. We assessed the current status of this project in terms of community awareness, dependency, involvement and perceptions, using a household survey and semi-structured interviews with key informants. We also compared some of our findings with those of previous studies at the site, finding that the project has fewer dependents, primary livelihood activities have shifted towards tourism and hospitality, and respondents are more aware about environmental conservation and stewardship. We map outcomes of the project with the Sustainable Livelihoods Framework, and suggest that further capacity building for research and tourism could contribute towards sustaining the turtle population, local livelihoods, and the community-based conservation institution.

scholarly journals Shading and Watering as a Tool to Mitigate the Impacts of Climate Change in Sea Turtle Nests

PLoS ONE ◽  
2015 ◽  
Vol 10 (6) ◽  
pp. e0129528 ◽  
Author(s):  
Jacob E. Hill ◽  
Frank V. Paladino ◽  
James R. Spotila ◽  
Pilar Santidrián Tomillo
Keyword(s):  
Climate Change ◽  
Sea Turtle ◽  
Impacts Of Climate Change

Sedimentological characteristics of key sea turtle rookeries: potential implications under projected climate change

2010 ◽  
Vol 61 (4) ◽  
pp. 464 ◽  
Author(s):  
M. M. P. B. Fuentes ◽  
J. L. Dawson ◽  
S. G. Smithers ◽  
M. Hamann ◽  
C. J. Limpus
Keyword(s):  
Climate Change ◽  
Sea Turtles ◽  
Sea Turtle ◽  
Ecological Impacts ◽  
Coarse Grained ◽  
Sediment Characteristics ◽  
Emergence Success ◽  
Ecological Implications ◽  
Turtle Population ◽  
Reef Islands

Sea turtles rely on reef islands for key parts of their reproductive cycle and require specific sediment characteristics to incubate their eggs and dig their nests. However, little is known about the sedimentological characteristics of sea turtle rookeries, how these sediment characteristics affect the vulnerability of rookeries to climate change, and the ecological implications of different sediment or altered sediment characteristics to sea turtles. Therefore, we described the sediment and identified the reef-building organisms of the seven most important rookeries used by the northern Great Barrier Reef (nGBR) green turtle population. We then reviewed the literature on the vulnerability of each identified reef-building organism to climate change and how various sediment characteristics ecologically affect sea turtles. Sediments from the studied rookeries are predominantly composed of well-sorted medium-grained to coarse-grained sands and are either dominated by Foraminifera, molluscs or both. Dissimilarities in the contemporary sedimentology of the rookeries suggest that each may respond differently to projected climate change. Potential ecological impacts from climate change include: (1) changes in nesting and hatchling emergence success and (2) reduction of optimal nesting habitat. Each of these factors will decrease the annual reproductive output of sea turtles and thus have significant conservation ramifications.

scholarly journals Assessing the evidence of ‘infertile’ sea turtle eggs

2020 ◽  
Vol 41 ◽  
pp. 329-338
Author(s):  
AD Phillott ◽  
MH Godfrey
Keyword(s):  
Climate Change ◽  
Incubation Period ◽  
Sea Turtle ◽  
Successful Mating ◽  
Physical Evidence ◽  
Breeding Populations ◽  
Sperm Penetration ◽  
Anthropogenic Drivers ◽  
Perivitelline Membrane ◽  
Nesting Season

There is increasing concern about feminization of sea turtle populations resulting from female-biased production of hatchlings due to climate change and selective loss of males from other anthropogenic drivers. Extreme female-biased breeding populations would reduce the likelihood of successful mating and potentially result in high rates of infertile eggs. Infertile eggs are those in which none of the events between sperm penetration of the ovum and syngamy have occurred. Distinguishing between fertile and infertile eggs is challenging, especially in field conditions, and researchers often have relied on physical evidence gathered from unhatched eggs at the end of the incubation period, which likely have experienced tissue decomposition. We argue that infertility in sea turtle eggs can be demonstrated only by the absence of holes caused by sperm penetration of the inner perivitelline membrane; sperm bound between the inner and outer perivitelline membranes; nuclei in the blastodisc; embryonic tissue or membranes in egg contents; and/or the characteristic white spot on the egg exterior. Unhatched eggs can be examined at the end of the incubation period, but we recommend that studies specifically investigating infertility examine at least 20 oviposited eggs each from clutches laid by at least 20 different turtles at the peak of the nesting season.

scholarly journals SOSIALISASI PENGENALAN HEWAN PENYU LAUT MELALUI PERMAINAN MENARIK BAGI ANAK SEKOLAH DASAR SDN ALUE PIET GAMPONG ALUE PIET

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Mohamad Gazali
Keyword(s):  
Elementary School ◽  
Coastal Area ◽  
Sea Turtle ◽  
Or Education ◽  
Elementary School Student ◽  
Commercial Interest ◽  
Turtle Conservation ◽  
Nesting Site ◽  
Sea Turtle Conservation

Conservation is one of the activity that hope to prevent the sea turtle are scarce, to prevent sea turtle utilization for commercial interest such as sold the eggs, flesh, as well as carapaces and become sharing knowledge facility or education for community widely regarding the importance of sea turtle conservation for keeping sea turtle habitat  in Indonesia in order it is not scarce. The target of communities are elementary school student SDN Alue Piet. According to the interview that many student that inhabited in Panga Pasie Coastal area still feel strange with sea turtle. Among of them ever found it in the coastal area on the morning to feel fearness with this creature that appeared strange. Therefore, we conduct the community serving through the socialization of sea turtle introduction with interesting of media  game. The community serving including surveying of elementary school that approach with nesting site, socialization of sea turtle introduction through video sea turtle animation, doing of Quiz,  and undertaken arrangement of sea turtle puzzle picture. Overall activities of community serving undergone on time and obtained supporting from SDN Alue Piet organizer.

scholarly journals Climate change and green sea turtle sex ratio – Preventing possible extinction

2020 ◽  
Author(s):  
Jana Blechschmidt ◽  
Meike J. Wittmann ◽  
Chantal Blüml
Keyword(s):  
Climate Change ◽  
Sex Ratio ◽  
Nest Site ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Change Scenario ◽  
Green Sea Turtles ◽  
The Face ◽  
Nest Depth

AbstractClimate change poses a threat to species with temperature-dependent sex determination. A recent study on green sea turtles (Chelonia mydas) at the northern Great Barrier Reef (GBR) showed a highly female-skewed sex ratio with almost all juvenile turtles being female. This shortage of males might eventually cause population extinction, unless rapid evolutionary rescue, migration or conservation efforts ensure a sufficient number of males. We built a stochastic individual-based model inspired by C. mydas, but potentially transferrable to other species with TSD. Nest depth, level of shade, and pivotal temperature were evolvable traits. Additionally, we considered the effect of crossbreeding between the northern and southern GBR, nest-site philopatry, and conservation efforts. Among the evolvable traits, nest depth was the most likely to rescue the population in the face of climate change, but even here the more extreme climate-change scenario led to extinction. Surprisingly, nest-site philopatry elevated extinction rates. Conservation efforts to artificially increase nest depth promoted population survival and did not preclude trait evolution. Although extra information is needed to make reliable predictions for the fate of green sea turtles, our results illustrate how evolution can shape the fate of long lived, vulnerable species in the face of climate change.Graphical Abstract

scholarly journals Climate change increases the production of female hatchlings at a northern sea turtle rookery

Ecology ◽  
2016 ◽  
Vol 97 (12) ◽  
pp. 3257-3264 ◽  
Author(s):  
J. L. Reneker ◽  
S. J. Kamel
Keyword(s):  
Climate Change ◽  
Sea Turtle

scholarly journals Assessing climate change associated sea‐level rise impacts on sea turtle nesting beaches using drones, photogrammetry and a novel GPS system

2018 ◽  
Vol 25 (2) ◽  
pp. 753-762 ◽  
Author(s):  
Miguel R. Varela ◽  
Ana R. Patrício ◽  
Karen Anderson ◽  
Annette C. Broderick ◽  
Leon DeBell ◽  
...  
Keyword(s):  
Climate Change ◽  
Sea Level Rise ◽  
Sea Level ◽  
Sea Turtle ◽  
Gps System ◽  
Nesting Beaches ◽  
Sea Level Rise Impacts
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