Physiological adjustments to prolonged diving in the Pacific green turtle (Chelonia mydas agassizii)

AbstractClimate change affects every crevice and corner of the ecological world. Already we see seasonal effects on important ecosystems such as the marine habitats of the Galápagos Archipelago. This paper looks at the year 2100 in the IPCC scenario A1B, looking specifically at Chelonia mydas agassizii and seeing whether it will be a “winner” or a “loser” under climate change. We discover that while neonate hatchlings may benefit from a compressed laying period that offers them protection by way of numbers, and speed from the increased ocean temperatures (SST), they lose out many other places. Frigatebird and reef fish predation will increase, hatchling size and fitness may decrease, and a surplus of female hatchlings will be produced, or none at all as nest temperatures rise above the thermal mortality limit. Chelonia mydas agassizii will need serious conservation help if we wish to keep it on this earth by the year 2100 even if we opt for the A1B strategy.

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Genetic Stock Structure of Green Turtle (Chelonia mydas) Nesting Populations Across the Pacific Islands

Pacific Science ◽

10.2984/68.4.1 ◽

2014 ◽

Vol 68 (4) ◽

pp. 451-464 ◽

Cited By ~ 27

Author(s):

Peter H. Dutton ◽

Michael P. Jensen ◽

Karen Frutchey ◽

Amy Frey ◽

Erin LaCasella ◽

...

Keyword(s):

Green Turtle ◽

Pacific Islands ◽

Chelonia Mydas ◽

Stock Structure ◽

Genetic Stock ◽

The Pacific

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CONDITIONS OF HILLING HABITAT OF CHELONIA MYDAS (GREEN TURTLE) IN PANGUMBAHAN BEACH UJUNG GENTENG, SUKABUMI SELATAN

Journal of Science Innovare ◽

10.33751/jsi.v1i02.1003 ◽

2019 ◽

Vol 1 (02) ◽

pp. 64-67

Author(s):

Meilisha Putri Pertiwi ◽

Suci Siti Lathifah

Keyword(s):

Data Collection ◽

Surface Temperature ◽

Green Turtle ◽

Data Retrieval ◽

Distribution Patterns ◽

Chelonia Mydas ◽

Nesting Habitat ◽

Beach Width ◽

The Many ◽

Pandanus Tectorius

Research on the condition of the nesting habitat of Chelonia mydas (green turtle) in Pangumbahan Beach, Ujung Genteng, South Sukabumi has been carried out. Data retrieval is done 6 times for 2 days, 27-28 November 2017 at 3 observation stations. The abiotic parameters measured include surface temperature and depth of 50 cm, surface humidity and depth of 50 cm, beach width, beach slope, and the size of sand grains. While the biotic parameters measured were density, relative density, the frequency of attendance, and distribution patterns of Pandanus tectorius (sea pandanus) vegetation. Based on the results of data processing, the biophysical conditions in Pangumbahan Beach are still suitable for the Chelonia mydas nesting habitat. It also got clear evidence of the many Chelonia mydas landings during the data collection.

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Structural description of sea turtle fibropapilloma

Brazilian Journal of Veterinary Pathology ◽

10.24070/bjvp.1983-0246.v13i3p585-591 ◽

2020 ◽

Vol 13 (3) ◽

pp. 585-591

Author(s):

Luana Melo ◽

Isabel Velasco ◽

Julia Aquino ◽

Rosangela Rodrigues ◽

Edris Lopes ◽

...

Keyword(s):

Green Turtle ◽

Chelonia Mydas ◽

Sea Turtle ◽

Tumor Formation ◽

Neoplastic Disease ◽

Structural Description ◽

Chemical Carcinogens ◽

Epidermal Proliferation ◽

Turtle Population ◽

Bulky Mass

Fibropapillomatosis is a neoplastic disease that affects sea turtles. It is characterized by multiple papillomas, fibropapillomas and cutaneous and/or visceral fibromas. Although its etiology has not been fully elucidated, it is known that there is a strong involvement of an alpha - herpesvirus, but the influence of other factors such as parasites, genetics, chemical carcinogens, contaminants, immunosuppression and ultraviolet radiation may be important in the disease, being pointed out as one of the main causes of a reduction in the green turtle population. Thus, the objective of this article was to describe the morphology of cutaneous fibropapillomas found in specimens of the green turtle (Chelonia mydas), using light and scanning electron microscopy in order to contribute to the mechanism of tumor formation. Microscopically, it presented hyperplastic stromal proliferation and epidermal proliferation with hyperkeratosis. The bulky mass was coated with keratin, with some keratinocyte invaginations, that allowed the keratin to infiltrate from the epidermis into the dermis, forming large keratinized circular spirals. Another fact that we observed was the influence of the inflammation of the tumors caused by ectoparasites.

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