Exclusive predation of sea turtle hatchlings by juvenile blacktip reef sharks Carcharhinus melanopterus at a turtle nesting site in Malaysia

2020 ◽  
Vol 97 (6) ◽  
pp. 1876-1879
Author(s):  
Zalina Bashir ◽  
Maizah M. Abdullah ◽  
Mazlan Abd. Ghaffar ◽  
Mohd Uzair Rusli
Keyword(s):  
Sea Turtle ◽  
Nesting Site ◽  
Reef Sharks ◽  
Carcharhinus Melanopterus

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 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.

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

Sex Ratio Estimation of the Most Eastern Main Loggerhead Sea Turtle Nesting Site: Anamur Beach, Mersin, Turkey

2012 ◽  
Vol 58 (1) ◽  
pp. 87-100 ◽  
Author(s):  
Aşkin Hasan Uçar ◽  
Yakup Kaska ◽  
Serap Ergene ◽  
Cemil Aymak ◽  
Yasemin Kaçar ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Sea Turtle ◽  
Ratio Estimation ◽  
Loggerhead Sea Turtle ◽  
Nesting Site

scholarly journals Relationship between the biomass of reef shark and fish in South Morotai Waters, North Maluku, Indonesia

2020 ◽  
Vol 21 (12) ◽  
Author(s):  
JIBRIEL FIRMAN SOFYAN ◽  
AMBARIYANTO AMBARIYANTO ◽  
KEN SUWARTIMAH ◽  
Abdul Hamid A. Toha
Keyword(s):  
Regression Analysis ◽  
Positive Relationship ◽  
Biomass Estimation ◽  
Functional Composition ◽  
Visual Census ◽  
Underwater Visual Census ◽  
Reef Shark ◽  
Triaenodon Obesus ◽  
Reef Sharks ◽  
Carcharhinus Melanopterus

Abstract. Sofyan JF, Ambariyanto A, Suwartimah K, Toha AHA. 2020. Relationship between the biomass of reef shark and fish in South Morotai Waters, North Maluku, Indonesia. Biodiversitas 21: 5605-5613. This study aims to determine the biomass of reef shark and fish in South Morotai Waters in North Maluku, Indonesia. The Audible Stationary Count and Underwater Visual Census method were used to collect the data of reef sharks and fish. Seven and one site locations of coral reef and shark ecosystems were surveyed and, the data were analyzed using regression analysis to obtain a correlation between the variables. The three reef sharks found were Carcharhinus melanopterus, Triaenodon obesus, and Carcharhinus amblyrhynchos. Biomass estimation of reef sharks and fish ranged from 0.59 to 19.97 kg/ha and 30.95 kg/ha to 49.92 kg/ha, consisting of 8 families. In the area of aggregations, both species were found in 7 sites, and the population of reef shark amounted to 86.96 kg/ha and fish was around 55.705 kg/ha, consisting of 9 families. There was a positive relationship between the biomass of reef shark and fish in South Morotai waters, and the index of determination was 0.8043, showing that the biomass of reef shark was influenced by that of fish. These results indicated the importance of biomass in determining the functional composition and diversity of reef shark and fish.

Low male production at the world’s largest green turtle rookery

2020 ◽  
Vol 653 ◽  
pp. 181-190
Author(s):  
DT Booth ◽  
A Dunstan ◽  
I Bell ◽  
R Reina ◽  
J Tedeschi
Keyword(s):  
Green Turtle ◽  
Hatching Success ◽  
Incubation Temperature ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Green Turtles ◽  
Nesting Site ◽  
Almost All ◽  
Monthly Variations ◽  
Nesting Season

Because the sex of all sea turtle hatchlings is determined by incubation temperature, with low temperatures producing mainly males and high temperatures producing mainly females, sea turtle populations worldwide are threatened by feminization of hatchlings due to increases in global temperature. Data obtained by laparoscopic sexing of immature individuals captured from a major feeding ground indicates that over several decades there has been little recruitment of males into the northern Great Barrier Reef (nGBR) green turtle Chelonia mydas population, one of the largest sea turtle populations in the world. Over 2 nesting seasons, we measured nest temperatures at Raine Island, the most important nesting site for this nGBR population, and predicted that almost all nests would have produced all female hatchlings. The few nests that produced some male hatchlings were constructed at the very end of the nesting season, and these nests had the lowest hatching success. Taking into account monthly variations in nest construction, hatching success, and hatchling sex ratio, we estimate that over an entire nesting season only 0.7% of hatchlings produced are male. Hence, we conclude that the nGBR population of green turtles has likely recruited very few males in recent years.

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