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

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.

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Ocular dimensions and schematic eyes of freshwater and sea turtles

Visual Neuroscience ◽

10.1017/s0952523800010415 ◽

1991 ◽

Vol 7 (6) ◽

pp. 627-635 ◽

Cited By ~ 31

Author(s):

D. P. M. Northmore ◽

A. M. Granda

Keyword(s):

Refractive Error ◽

Sea Turtles ◽

Chelonia Mydas ◽

Freshwater Turtle ◽

Eretmochelys Imbricata ◽

Marine Turtles ◽

Pseudemys Scripta

AbstractMeasurements were made of the ocular dimensions from living and frozen eyes of one species of freshwater turtle, Pseudemys scripta elegans, and of three species of marine turtles, Chelonia mydas, Dermochelys cariacea, and Eretmochelys imbricata. Estimates of refractive error by retinoscopy were also obtained with eyes in air and under water. The results suggest that unaccommodated eyes of all four species are approximately emmetropic in air but strongly hyperopic in water. Schematic eyes were calculated for each species in both air and water.

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

Gulf and Caribbean Research ◽

10.18785/gcr.3201.05 ◽

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.

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PRIMEROS REGISTROS DE TORTUGAS BLANCAS Chelonia mydas CON FIBROPAPILOMAS, EN YUCATÁN, MÉXICO

CICIMAR Oceánides ◽

10.37543/oceanides.v22i1-2.35 ◽

2007 ◽

Vol 22 (1-2) ◽

pp. 29

Author(s):

A. Maldonado-Gasca, ◽

M. Zapata-Rosales

Keyword(s):

Green Turtle ◽

Carapace Length ◽

Sea Turtles ◽

Chelonia Mydas ◽

Marine Turtles ◽

Straight Carapace Length ◽

Green Turtles ◽

High Prevalence ◽

Migratory Route

First reports of green turtles Chelonia mydas with fibropapillomas, in Yucatán, México Fibropapillomas are cutaneous tumors that affect the health of marine turtles worldwide. In July 11th of 1998, a juvenile green turtle (Chelonia mydas) with tumors was captured by fishermen in the Sea Turtles Sanctuary of Rio Lagartos, Yucatán. The straight carapace length of this turtle was 44.6 cm, and we found 30 tumors with a size from 1 cm - 10 cm on the back flippers, neck, front flippers and in both eyes. On July 10th, 1999, another juvenile green turtle with fibropapillomatosis was captured by fishermen in the same area. This turtle was smaller (S.C.L. = 40.8 cm) with 5 small tumors (1 cm - 4 cm) on the back flippers and tail. The prevalence of fibro papillomatosis in Yucatan is low (2.4%). Considering the migratory route of this species and the high prevalence of green turtles with fibropapillomas in Florida, USA, we suggest an initial contagion between the populations of these peninsulas. Those are the first documented reports of green turtles with fibropapillomas in Yucatán, México.

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A Revision of the Subfamily Microscaphidiinae (Platyhelminthes, Digenea, Microscaphidiidae) Parasitic in Marine Turtles (Reptilia, Chelonia)

Australian Journal of Zoology ◽

10.1071/zo9860241 ◽

1986 ◽

Vol 34 (2) ◽

pp. 241 ◽

Cited By ~ 5

Author(s):

D Blair

Keyword(s):

Green Turtle ◽

Chelonia Mydas ◽

Nomen Nudum ◽

Taxonomic Significance ◽

Marine Turtles ◽

As Species ◽

First Time ◽

Species Inquirendae

A revision of the subfamily Microscaphidiinae Looss, 1900 is presented and characters of taxonomic significance discussed. The genus Microscaphidium Looss, 1900, contains M. reticulare (van Beneden, 1859) Looss, 1901 (synonyms M. japonicum Oguro, 1941; M. caballeroi Groschaft, 1977); M. aberrans Looss, 1902 (synonym M. reticulare in part); and M, warui, sp. nov. Confusion in the literature over the identities of M. reticulare and M. aberrans is discussed. A neotype is selected for the former species and a lectotype for the latter. Polyangium linguatula (Looss, 1899) Looss, 1902 (synonyms P. miyajimai Kobayashi, 1921; P. colymbi Poche, 1925; P. longiseminale Chattopadhyaya, 1972) is the sole species in Polyangium Looss, 1902. The genus Angiodictyum Looss, 1902 contains A. parallelum (Looss, 1901) Looss, 1902; A. posterovitellatum Chattopadhyaya, 1972; A. longum, sp, nov.; A. glossoides, sp. nov. Polygorgyra, gen. nov., is proposed for P. cholados, sp. nov. Microscaphidium chelonei Chattopadhyaya, 1972 nec Mehrotra, 1973 and Angiodictyum anteroporum Chattopadhyaya, 1972 are regarded as species inquirendae. Microscaphidium chelonei Mehrotra, 1973 nec Chattopadhyaya, 1972 is a nomen nudum. The following species are recorded for the first time from the green turtle, Chelonia mydas (L.) in Australian waters: Microscaphidium reticulare; M. aberrans; M. warui; Angiodictyum posterovitellatum; A. longum; Polygorgyra cholados.

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Green turtle head trauma with intracerebral hemorrhage: image diagnosis and treatment

Ciência Rural ◽

10.1590/s0103-84782010001100026 ◽

2010 ◽

Vol 40 (11) ◽

pp. 2402-2405 ◽

Cited By ~ 2

Author(s):

Daphne Wrobel Goldberg ◽

Alex Adeodato ◽

Daniella Torres de Almeida ◽

Leandro Gomes Corrêa ◽

Juçara Wanderlinde

Keyword(s):

Head Trauma ◽

Green Turtle ◽

Sea Turtles ◽

Chelonia Mydas ◽

Anthropogenic Effects ◽

Skull Fractures ◽

Major Goal ◽

Potential Threat ◽

Common Cause ◽

Image Diagnosis

Sea turtles are threatened to the point of extinction. The major goal of rehabilitating injured individuals is to eventually reintroduce them back into their habitat. Sea turtles are vulnerable to anthropogenic effects, and impact traumas are a common cause of death among these animals. Carapace and skull fractures are usually related to vessel collisions or propeller impacts. However, intentional traumas inflicted by humans are also considered as a potential threat. The purpose of this article is to describe the diagnosis and rehabilitation procedures of a juvenile green turtle (Chelonia mydas) after severe head trauma with brain hemorrhage. The data presented here can be used as a reference for future cases of head trauma in chelonians.

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STUDIES ON DIGESTIVE ORGANS OF TWO SEA TURTLES, Chelonia mydas L. and Eretmochelys imbricata L.

Indonesian Fisheries Research Journal ◽

10.15578/ifrj.11.1.2005.47-52 ◽

2017 ◽

Vol 11 (1) ◽

pp. 47

Author(s):

I Nyoman S. Nuitja ◽

Silvia Wijaya

Keyword(s):

Digestive Tract ◽

Carapace Length ◽

Sea Turtles ◽

Chelonia Mydas ◽

Eretmochelys Imbricata ◽

Digestive Organs

The digestive organs of two sea turdes, Chelonia mydas L. and Eretmochelys imbicata L. with purpose to analyse the digestive tract and other organs, also to preform their weight were carapace length relation skimp. The specimens of the two species were obtained from slaughtered houses in Benoa Bay, South Bali.

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The Effects of Nest Location and Beach Environment on Hatching Success for Leatherback (Dermochelys Coriacea) and Green (Chelonia Mydas) Sea Turtles on Bioko Island, Equatorial Guinea

10.21203/rs.3.rs-317848/v1 ◽

2021 ◽

Author(s):

Callie A. Veelenturf ◽

Elizabeth M. Sinclair ◽

Peter Leopold ◽

Frank V. Paladino ◽

Shaya Honarvar

Keyword(s):

Green Turtle ◽

Hatching Success ◽

Sea Turtles ◽

Chelonia Mydas ◽

Dermochelys Coriacea ◽

Equatorial Guinea ◽

Leatherback Turtles ◽

Nest Location ◽

Bioko Island ◽

Elevation Range

Abstract Hatching success in sea turtles is hindered by a variety of biotic and abiotic factors. This study of the nesting ecology of leatherback (Dermochelys coriacea) and green (Chelonia mydas) sea turtles, investigated how several environmental factors and beach characteristics on Bioko Island, Equatorial Guinea influence sea turtle reproductive success. Average clutch hatching success was 40.4% for green turtles and 41.73% for leatherback turtles. For leatherback turtles, clutch elevation relative to the high tide line (HTL) was found to be the most influential factor in determining hatching success, highlighting the sensitivity of this species to sea level rise (SLR). Multiple linear regression analysis demonstrated that nest distance to vegetation and sand conductivity also played significant roles in leatherback clutch hatching success. For leatherback clutches, 33% percent of experimental nests were affected by inundation and 17% by predation. An optimum clutch elevation range for leatherback turtles was identified, where a distinct increase in hatching success was observed between -0.286 m to -0.0528 m above the HTL. For green sea turtles, 64% of experimental nests were affected by predation, confounding conclusions about the roles of environmental characteristics in green turtle hatching success. We propose further investigation into influential characteristics in green turtle nests and confirmation of the observed optimum elevation range on Bioko Island and other nesting grounds. Identified sensitivities of each species to SLR and beach characteristics will be used to encourage the government of Equatorial Guinea to consider the vulnerability of their resident turtle populations when planning for future coastal development.

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