Characterization of fibropapillomatosis in green turtles Chelonia mydas (Cheloniidae) captured in a foraging area in southeastern Brazil

2016 ◽  
Vol 121 (3) ◽  
pp. 233-240 ◽  
Author(s):  
AB Tagliolatto ◽  
SM Guimarães ◽  
G Lobo-Hajdu ◽  
C Monteiro-Neto
Keyword(s):  
Chelonia Mydas ◽  
Southeastern Brazil ◽  
Green Turtles ◽  
Foraging Area

scholarly journals Plasma proteomics of green turtles (Chelonia mydas) reveals pathway shifts and potential biomarker candidates associated with health and disease

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
David P Marancik ◽  
Justin R Perrault ◽  
Lisa M Komoroske ◽  
Jamie A Stoll ◽  
Kristina N Kelley ◽  
...  
Keyword(s):  
Chelonia Mydas ◽  
Sea Turtle ◽  
Protein Abundance ◽  
Plasma Samples ◽  
Important Species ◽  
Green Turtles ◽  
Rehabilitation Programs ◽  
Potential Biomarker ◽  
Health And Disease

Abstract Evaluating sea turtle health can be challenging due to an incomplete understanding of pathophysiologic responses in these species. Proteome characterization of clinical plasma samples can provide insights into disease progression and prospective biomarker targets. A TMT-10-plex-LC–MS/MS platform was used to characterize the plasma proteome of five, juvenile, green turtles (Chelonia mydas) and compare qualitative and quantitative protein changes during moribund and recovered states. The 10 plasma samples yielded a total of 670 unique proteins. Using ≥1.2-fold change in protein abundance as a benchmark for physiologic upregulation or downregulation, 233 (34.8%) were differentially regulated in at least one turtle between moribund and recovered states. Forty-six proteins (6.9%) were differentially regulated in all five turtles with two proteins (0.3%) demonstrating a statistically significant change. A principle component analysis showed protein abundance loosely clustered between moribund samples or recovered samples and for turtles that presented with trauma (n = 3) or as intestinal floaters (n = 2). Gene Ontology terms demonstrated that moribund samples were represented by a higher number of proteins associated with blood coagulation, adaptive immune responses and acute phase response, while recovered turtle samples included a relatively higher number of proteins associated with metabolic processes and response to nutrients. Abundance levels of 48 proteins (7.2%) in moribund samples significantly correlated with total protein, albumin and/or globulin levels quantified by biochemical analysis. Differentially regulated proteins identified with immunologic and physiologic functions are discussed for their possible role in the green turtle pathophysiologic response and for their potential use as diagnostic biomarkers. These findings enhance our ability to interpret sea turtle health and further progress conservation, research and rehabilitation programs for these ecologically important species.

Chelonid herpesvirus 5 in secretions and tumor tissues from green turtles (Chelonia mydas) from Southeastern Brazil: A ten-year study

2016 ◽  
Vol 186 ◽  
pp. 150-156 ◽  
Author(s):  
Telma A. Monezi ◽  
Dolores U. Mehnert ◽  
Elisabeth M.M. de Moura ◽  
Natascha M.G. Müller ◽  
Patrícia Garrafa ◽  
...  
Keyword(s):  
Chelonia Mydas ◽  
Southeastern Brazil ◽  
Green Turtles ◽  
Tumor Tissues

Growth Rates of Wild Green Turtles (Chelonia mydas) at a Temperate Foraging Area in the Gulf of California, México

Copeia ◽  
2002 ◽  
Vol 2002 (3) ◽  
pp. 610-617 ◽  
Author(s):  
Jeffrey A. Seminoff ◽  
Antonio Resendiz ◽  
Wallace J. Nichols ◽  
T. Todd Jones
Keyword(s):  
Growth Rates ◽  
Gulf Of California ◽  
Chelonia Mydas ◽  
Green Turtles ◽  
Foraging Area

Monitoring green turtles (Chelonia mydas) at a coastal foraging area in Baja California, Mexico: multiple indices to describe population status

2003 ◽  
Vol 83 (6) ◽  
pp. 1355-1362 ◽  
Author(s):  
Jeffrey A. Seminoff ◽  
T. Todd Jones ◽  
Antonio Resendiz ◽  
Wallace J. Nichols ◽  
Milani Y. Chaloupka
Keyword(s):  
Los Angeles ◽  
Gulf Of California ◽  
Human Impacts ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Catch Per Unit Effort ◽  
Recovery Model ◽  
Size Frequency Distribution ◽  
Green Turtles ◽  
Foraging Area

From June 1995 to August 2002 we assessed green turtle (Chelonia mydas) population structure and survival, and identified human impacts at Bahía de los Angeles, a large bay that was once the site of the greatest sea turtle harvest rates in the Gulf of California, Mexico. Turtles were captured live with entanglement nets and mortality was quantified through stranding surveys and flipper tag recoveries. A total of 14,820 netting hours (617·5 d) resulted in 255 captures of 200 green turtles. Straight-carapace length and mass ranged from 46·0–100·0 cm (mean=74·3±0·7 cm) and 14·5–145·0 kg (mean=61·5±1·7 kg), respectively. The size–frequency distribution remained stable during all years and among all capture locations. Anthropogenic-derived injuries ranging from missing flippers to boat propeller scars were present in 4% of captured turtles. Remains of 18 turtles were found at dumpsites, nine stranded turtles were encountered in the study area, and flipper tags from seven turtles were recovered. Survival was estimated at 0·58 for juveniles and 0·97 for adults using a joint live-recapture and dead-recovery model (Burnham model). Low survival among juveniles, declining annual catch per unit effort, and the presence of butchered carcasses indicated human activities continue to impact green turtles at this foraging area.

scholarly journals Effects of a power plant closure on home ranges of green turtles in an urban foraging area

2020 ◽  
Vol 41 ◽  
pp. 265-277 ◽  
Author(s):  
T Eguchi ◽  
J Bredvik ◽  
S Graham ◽  
R LeRoux ◽  
B Saunders ◽  
...  
Keyword(s):  
Power Plant ◽  
Green Turtle ◽  
Chelonia Mydas ◽  
Home Ranges ◽  
Utilization Distribution ◽  
Green Turtles ◽  
Foraging Area ◽  
San Diego Bay ◽  
Conservation Actions ◽  
Satellite Transmitters

A natural experiment was conducted to determine effects of a fossil-fueled power plant on home ranges of east Pacific green turtles Chelonia mydas in an urban foraging ground. The power plant, located in south San Diego Bay, California, USA, co-existed with a resident foraging aggregation of ~60 green turtles for ~50 yr. It was decommissioned during a long-term green turtle monitoring study, thus providing a rare opportunity to evaluate how the cessation of warm-water effluent affected turtle movements and habitat use in the area. During pre- and post-decommissioning of the power plant, 7 and 23 green turtles, respectively, were equipped with GPS-enabled satellite transmitters. Useful data were obtained from 17 turtles (4 for pre- and 13 for post-decommissioning). Core use areas (50% utilization distribution [UD]) increased from 0.71 to 1.37 km2 after the power plant decommissioning. Increase in post-power plant 50% UD was greater during nighttime (0.52 to 1.44 km2) than daytime (1.32 to 1.43 km2). Furthermore, UDs moved from the effluent channel to an area closer to seagrass pastures, a presumed foraging habitat of the turtles. The observed expansion of green turtle home ranges may increase turtle-human interactions, such as boat strikes, within the foraging ground; this underscores how seemingly innocuous human actions contribute to inadvertent consequences to wildlife. Possible management and conservation actions include increasing awareness of the public regarding turtle presence in the area through signage and education as well as legislating for a reduction in boat speeds in select areas of the bay.

scholarly journals Detection and characterization of fibropapilloma associated herpesvirus of marine turtles in Rio Grande do Sul, Brazil

2012 ◽  
Vol 32 (11) ◽  
pp. 1179-1183 ◽  
Author(s):  
Carla R. Rodenbusch ◽  
Laura L. Almeida ◽  
Fernanda S. Marks ◽  
Michelli W. Ataíde ◽  
Marcelo M. Alievi ◽  
...  
Keyword(s):  
Genetic Factors ◽  
Sea Turtles ◽  
Rio Grande ◽  
Chelonia Mydas ◽  
Rio Grande Do Sul ◽  
Marine Turtles ◽  
Green Turtles ◽  
Dna Fragment ◽  
First Time

Fibropapillomatosis (FP) is a benign tumoral disease that affects sea turtles, hampering movement, sight and feeding, ultimately leading to death. In Brazil, the disease was described for the first time in 1986. Research suggests the involvement of a herpesvirus in association with environmental and genetic factors as causal agents of FP. The objective of the present study was to detect and characterize this herpesvirus in sea turtles living in the coast of state Rio Grande do Sul (RS), Brazil. From October 2008 to July 2010, 14 turtles were observed between the beaches of Torres and Tavares, of which 11 were green turtles (Chelonia mydas) and 3 were loggerhead turtles (Caretta caretta). All turtles were young and mean curved carapace length was 37.71±7.82cm, and varied from 31 to 55cm. Only one green turtle presented a 1cm, papillary, pigmented fibropapilloma. Skin and fibropapilloma samples were analyzed by conventional and real time PCR assays to detect and quantify herpesvirus. All skin samples were negative, though the fibropapilloma specimen was positive in both tests. Viral load was 9,917.04 copies of viral genome per milligram of tissue. The DNA fragment amplified from the fibropapilloma sample was sequenced and allocated in the Atlantic phylogeographic group. This study reports the first molecular characterization of herpesvirus associated with fibropapilloma in turtles from the coast of RS.

No rest for the weary: restricted resting behaviour of green turtles (Chelonia mydas) at a deep-neritic foraging area influences expression of life history traits

2020 ◽  
Vol 54 (45-46) ◽  
pp. 2979-3001
Author(s):  
Jeffrey A. Seminoff ◽  
Elizabeth R. Whitman ◽  
Bryan P. Wallace ◽  
Ali Bayless ◽  
Antonio Resendiz ◽  
...  
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Chelonia Mydas ◽  
Green Turtles ◽  
Resting Behaviour ◽  
Foraging Area
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