Trace elements distribution in hawksbill turtle (Eretmochelys imbricata) and green turtle (Chelonia mydas) tissues on the northern coast of Bahia, Brazil

2015 ◽  
Vol 94 (1-2) ◽  
pp. 284-289 ◽  
Author(s):  
Gustavo R. de Macêdo ◽  
Taiana B. Tarantino ◽  
Isa S. Barbosa ◽  
Thaís T. Pires ◽  
Gonzalo Rostan ◽  
...  
Keyword(s):  
Trace Elements ◽  
Green Turtle ◽  
Chelonia Mydas ◽  
Northern Coast ◽  
Eretmochelys Imbricata

Hawksbill turtle (Eretmochelys imbricata Linnaeus 1766) and green turtle (Chelonia mydas Linnaeus 1754) nesting activity (2002-2004) at El Cuyo beach, Mexico

2006 ◽  
Vol 27 (4) ◽  
pp. 539-547 ◽  
Author(s):  
Raquel Xavier ◽  
Andre Barata ◽  
Leopoldo Palomo Cortez ◽  
Nuno Queiroz ◽  
Eduardo Cuevas
Keyword(s):  
Green Turtle ◽  
Average Distance ◽  
Biosphere Reserve ◽  
Chelonia Mydas ◽  
Eretmochelys Imbricata ◽  
Nest Location ◽  
Hurricane Ivan ◽  
Green Turtles ◽  
Nest Site Fidelity ◽  
Nesting Activity

Abstract The Yucatan Peninsula nesting hawksbill turtles' population (Eretmochelys imbricata Linnaeus 1766) is the biggest in the Caribbean and fourth in the world; within the Ría Lagartos Biosphere Reserve, at El Cuyo beach both hawksbill and green turtle (Chelonia mydas Linnaeus 1754) nest. In the present study, the nesting trend and reproductive output of both species during three consecutive nesting seasons (2002-2004) was evaluated. Night patrols from mid April to September allowed the collection of data on number of nests, nest location and size of females. The number of hawksbill and green turtles' nests decreased along these seasons. No differences were found in mean length of female turtles of both species between nesting seasons. Both species showed high nest site fidelity with average distance between nests of 3 km for Hawksbill and 1.8 km for Green turtles. The regression analysis between size and fecundity was significant (p < 0.05) for both species. The spatial variation of laid nests was also analyzed revealing that both species nested mainly on the dune zone. Predation has risen on El Cuyo beach, affecting mostly hawksbills nests. Hurricane Ivan destroyed the majority of green turtles nests in 2004.

Paramphistomes (Digenea; Paramphistomidae) Parasitic in Marine Turtles (Reptilia: Chelonia).

1983 ◽  
Vol 31 (5) ◽  
pp. 851 ◽  
Author(s):  
D Blair
Keyword(s):  
Green Turtle ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Original Material ◽  
Eretmochelys Imbricata ◽  
Marine Turtles ◽  
Australian Region ◽  
Species Inquirenda ◽  
Australian Specimen

Schizamphistomum scleroporum (Creplin, 1844) Groschaft, Otero & Tenora, 1977 nec Looss, 1912, and S. erratum, sp. nov. [=S. scleroporum sensu Looss, 1912 (nec Creplin, 1844)], are described from the green turtle, Chelonia mydas (L.), from Australia. One specimen of the former species was also recovered from an Australian specimen of the hawksbill turtle, Eretmochelys imbricata (L.). Paramphistomum papillostomum MacCallum, 1916 and Schizamphistomoides chelonei Gupta, 1961, are regarded as synonyms of Schizamphistomum scleroporum (Creplin). S. taiwanense Fischthal & Kunz, 1975 is regarded as a species inquirenda. The remaining species known from sea turtles, Schizamphistomoides spinulosum (Looss, 1901) Stunkard, 1925, is redescribed, mostly from original material collected by Looss. This species has not yet been found in the Australian region. The relationships between Schizamphistomum scleroporum, S. erratum and Schizamphntomoides spinulosum are discussed.

scholarly journals A Sea Turtle Population Assessment for Florida's Big Bend, Northeastern Gulf of Mexico

2021 ◽  
Vol 32 ◽  
pp. 19-33
Author(s):  
Ryan Chabot ◽  
Ryan Welsh ◽  
Cody Mott ◽  
Jeffrey Guertin ◽  
Brian Shamblin ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Green Turtle ◽  
Sea Turtles ◽  
Distance Sampling ◽  
Chelonia Mydas ◽  
The United States ◽  
Sea Turtle ◽  
Eretmochelys Imbricata ◽  
Green Turtles ◽  
Big Bend

Coastal waters of Florida’s Big Bend, Gulf of Mexico (GOM) once supported one of the largest sea turtle fisheries in the United States. To fill an information gap in this region on abundance and distribution of sea turtles, we used vessel—based distance sampling and active capture methods to characterize current foraging aggregations near the St. Martins Marsh Aquatic Preserve. Over 10 sampling periods between 2012—2018, we completed 513 km of transects and recorded 819 turtles among 4 species—green turtle (Chelonia mydas, n = 624), Kemp’s ridley (Lepidochelys kempii, n = 147), loggerhead (Caretta caretta, n = 47), and a single hawksbill (Eretmochelys imbricata). Turtle densities in 4 study plots within the 200 km2 study site ranged from 57—221 immature green turtles/km2, 16—56 immature Kemp’s ridleys/km2, and 1—14 juvenile—to—adult loggerheads/km2. Of 200 green turtles captured, 67.5% showed skin tumors consistent with fibropapillomatosis, a frequency similar to that from urbanized estuaries of Florida’s east coast. The largest green turtles (> 60 cm straight standard carapace length), abundant in the southern portion of our study area, are of note because this size class is uncommonly recorded within US territorial waters. Analyses of green turtle mtDNA haplotypes found contributions from rookeries in the western GOM, Mexican Caribbean, and Costa Rica. Although Big Bend protected areas were principally designed to conserve marine and coastal habitats, these regulatory zones have also effectively encompassed a hotspot for foraging sea turtles.

scholarly journals DETERMINACIÓN DE DDT Y DDE EN HUEVOS DE TORTUGA BLANCA (Chelonia mydas) Y DE TORTUGA CAREY (Eretmochelys imbricata), EN LA COSTA DE YUCATÁN, MÉXICO.

2003 ◽  
Vol 18 (2) ◽  
pp. 87
Author(s):  
E. Cuevas ◽  
A. Maldonado ◽  
V. Cobos
Keyword(s):  
Gas Chromatography ◽  
Green Turtle ◽  
Ecological Impact ◽  
Chelonia Mydas ◽  
Eretmochelys Imbricata ◽  
Chronic Effects ◽  
Low Concentrations ◽  
Biologic Effects

Evidence exists linking organochlorines to adverse biologic effects, like mating disfunctions and inmunosupression. The pesticide DDT is an organochlorine used in Mexico for combating malaria. In October 4th 2000, eight unviable green turtle and hawksbill turtle eggs were collected in El Cuyo and Celestún, Yucatán, México, respectively, and they were analyzed, using gas chromatography, to detect quantifiable organochlorine concentrations. DDE residual were not detected in any of the sea turt le eggs. Only two green turtle eggs had quantifiable DDT concentrations (0.059 ppm and 0.0550 ppm), both of which were considered lower in comparison to other studies, even though threshold limits of or ganochlorine concentrations for reptiles have not been established. These low concentrations should not be expected to bring immediate consequences and their chronic effects would be minimal. However, it is necessary to make more indepth studies to determine the potential ecological impact of these concentrations in this area. Yucatan State (México) fisheries: history and management during the period 1976- 1997

scholarly journals First report of Pyelosomum cochlear (Digenea: Pronocephalidae) in a Hawksbill Turtle – Eretmochelys imbricata L. found in Brazilian Coast

2019 ◽  
Vol 56 (4) ◽  
pp. 334-337
Author(s):  
M. R. Werneck ◽  
R. Velloso ◽  
P. B. Costa Das Chagas ◽  
H. Jerdy Leandro ◽  
R. Martins De Amorim
Keyword(s):  
Green Turtle ◽  
Present Note ◽  
Chelonia Mydas ◽  
Brazilian Coast ◽  
Olive Ridley ◽  
Eretmochelys Imbricata ◽  
Lepidochelys Olivacea ◽  
First Occurrence ◽  
The Usa ◽  
Olive Ridley Turtle

SummaryPyelosomum cochlearLooss 1899 (Digenea: Pronocephalidae) is a parasite exclusive to sea turtles, having been described in the green turtle (Chelonia mydas) in Egypt, the USA, Panama, Costa Rica and Brazil as well as the olive ridley turtle (Lepidochelys olivacea) in Brazil. The present note describes the first occurrence of P. cochlear in a hawksbill turtle (Eretmochelys imbricata) found on the coast of Brazil.

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

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.

Structural description of sea turtle fibropapilloma

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.

Discovery of a Major East Pacific Green Turtle (Chelonia mydas) Nesting Population in Northwest Costa Rica

2018 ◽  
Vol 17 (2) ◽  
pp. 169
Author(s):  
Luis G. Fonseca ◽  
Pilar Santidrián Tomillo ◽  
Wilbert N. Villachica ◽  
Wagner M. Quirós ◽  
Marta Pesquero ◽  
...  
Keyword(s):  
Costa Rica ◽  
Green Turtle ◽  
Chelonia Mydas ◽  
East Pacific

The Effect of Invertebrate Infestation on Green Turtle (Chelonia mydas) Nests on Kazanlı Beach, Mersın, Turkey

2020 ◽  
Vol 27 (5) ◽  
pp. 245-256
Author(s):  
Cemil Aymak ◽  
Aşkın Hasan Uçar ◽  
Yusuf Katılmış ◽  
Eyup Başkale ◽  
Serap Ergene
Keyword(s):  
Green Turtle ◽  
Hatching Success ◽  
Negative Relationship ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Faunal Composition ◽  
Independent Variables ◽  
Invertebrate Species ◽  
First Time ◽  
Nesting Season

In this study invertebrate infestation in green turtle (Chelonia mydas) nests were recorded for the first time for Kazanlı beach, Mersin, Turkey. For this aim, in 2006 nesting season, 294 natural intact green turtle nests were sampled to examine their contents and invertebrate infestation was found in 76 (25.85% of the total sampling green turtle nests). These infested nests were examined in terms of the invertebrate faunal composition. The specimens found in the green sea turtle nests were identified to order, family or genus levels and they were represented in 5 orders. These invertebrate groups are Elater sp. larvae (Elateridae; Coleoptera), Pimelia sp. larvae (Tenebrionidae; Coleoptera), Enchytraeidae (Oligochaeta), Cyrptostigmata (Acari), Oniscidae (Isopoda), Formicidae (Hymenoptera). Elater sp. was the most common invertebrate group in the green turtle nests. According to student t test, we found statistically significant differences between 7 independent variables and invertebrate species presence. Furthermore, logistic regression analysis explained that there is a negative relationship between hatching success rate and invertebrate species presence.

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