Stowaways: Marine Leeches Infecting Olive Ridley Sea Turtles Entangled in Ghost Nets in Maldivian Waters

2021 ◽  
Vol 88 (2) ◽  
Author(s):  
Stephanie Köhnk ◽  
Claire Petros ◽  
Claire Lomas ◽  
Enas Mohamed Riyad ◽  
Ibrahim Shameel ◽  
...  
2018 ◽  
Vol 17 (1) ◽  
pp. 27-36
Author(s):  
Catherine E. Hart ◽  
Adrián Maldonado-Gasca ◽  
César P. Ley-Quiñonez ◽  
Miguel Flores-Peregrina ◽  
Jose de Jesús Romero-Villarruel ◽  
...  

2020 ◽  
Vol 10 (16) ◽  
pp. 8688-8704
Author(s):  
Ian Silver‐Gorges ◽  
Julianne Koval ◽  
Clara J. Rodriguez‐Zarate ◽  
Frank V. Paladino ◽  
Mark Jordan

2013 ◽  
Vol 5 ◽  
pp. 119 ◽  
Author(s):  
Laura Brenes Chaves ◽  
Alexis Berrocal ◽  
Ana I. Meneses ◽  
Carlos Jiménez Sánchez ◽  
Carlos M. Orrego Vásquez

Sea turtle fibropapillomatosis is an emerging disease characterized by a proliferation of cutaneous papillomas, fibromas, and fibropapillomas and occasional visceral fibromas. This paper aims to contribute tothe etiology of fibropapillomatosis in olive ridley sea turtles (Lepidochelys olivacea) nesting in OstionalNational Wildlife Refuge. Twenty six olive ridley turtles with cutaneous fibropapilloma were sampled and24 healthy olive ridley turtles served as controls. Biopsies were taken of the cutaneous tumors in sick seaturtles, as well as skin biopsies from control subjects, and blood samples were collected from all turtles.Tumorous samples and skin samples were microscopically analyzed in order to differentiate the histologicalfactors resulting from the disease pathogenesis, where the main histological findings were papillaryepidermal hyperplasia, orthokeratotic hyperkeratosis, spirorchid-like eggs in the dermis, and eosinophilic cytoplasmic inclusion. Hematology and blood chemistry studies were conducted on blood samples, andMCHC, heterophils, lymphocytes, monocytes, AST, total protein, albumin and globulin values were significantlydifferent between healthy turtles and turtles with tumors. A PCR test was also conducted in thesamples to determine the presence of herpesvirus and papillomavirus as possible etiologic agents, wherethe papilomavirus was absent in all the samples, while the herpesvirus was present in 69.23% of the tumors,this being the most probable etiological agent of fibropapillomatosis.La fibropapilomatosis de la tortuga marina es una enfermedad emergente caracterizada por múltiples papilomas, fibromas y fibropapilomas cutáneos, así como ocasionales fibromas viscerales. El presente trabajo tiene como objetivo contribuir a la etiología de la fibropapilomatosis en la tortuga lora (Lepidochelys olivacea) que anida en el Refugio Nacional de Vida Silvestre Ostional. Se muestrearon 26 tortugas lora con fibropapilomas cutáneos y 24 tortugas lora sanas que sirvieron de control. Se tomaron biopsias excisionales de los tumores cutáneos de las tortugas enfermas y biopsias de piel de las tortugas control, además se recolectaron muestras de sangre de todas las tortugas. Las muestras tumorales y de piel se analizaron microscópicamente para diferenciar los factores histológicos que resultan de la patogénesis de la enfermedad, donde los hallazgos histopatológicos principales en los fibropapilomas fueron: crecimiento papiliforme, hiperqueratosis ortoqueratótica, huevos de parásitos similares a espiróquidos en la capa dérmica e inclusión eosinofílica citoplasmática. A las muestras de sangre se les realizó análisis hematológico y de química sanguínea, donde los valores de CHCM, heterófilos, linfocitos, monocitos, AST, proteínas totales, albúmina y globulinas resultaron significativamente diferentes entre las tortugas sanas y las tortugas con tumores. Se realizó PCR a las muestras para determinar la presencia de genoma de herpesvirus y papilomavirus como posibles agentes etiológicos, donde el papilomavirus estuvo ausente en la totalidad de las muestras, mientras el virus Herpes se presentó en el 69.23% de los tumores posicionándose como el posible agente etiológico de la enfermedad.


2017 ◽  
Vol 165 ◽  
pp. 115-123 ◽  
Author(s):  
Philippine Chambault ◽  
Lucie Giraudou ◽  
Benoît de Thoisy ◽  
Marc Bonola ◽  
Laurent Kelle ◽  
...  

2012 ◽  
Vol 159 (5) ◽  
pp. 1011-1019 ◽  
Author(s):  
Lélia Matos ◽  
Augusto C. C. D. Silva ◽  
Jaqueline C. Castilhos ◽  
Marilda I. Weber ◽  
Luciano S. Soares ◽  
...  

2021 ◽  
Author(s):  
B. Gabriela Arango ◽  
Martha Harfush-Meléndez ◽  
David C Ensminger ◽  
Elpidio Marcelino López-Reyes ◽  
José Alejandro Marmolejo-Valencia ◽  
...  

Olive ridley sea turtles, Lepidochelys olivacea, exhibit a polymorphic reproductive behaviour nesting in solitary or in mass aggregations termed "arribadas", where thousands of turtles nest at once. Arribadas may provide fitness benefits including mate finding during nearshore aggregations and predator satiation at the time of hatching, but the potential costs of arribada nesting remain understudied. To explore the potential trade-offs of the fitness benefits associated with arribada nesting, we collected blood from olive ridley turtles nesting in arribada and solitary. We measured reproductive and metabolic hormones (progesterone, estradiol, testosterone, thyroxine, and triiodothyronine), triglycerides (TG), non-esterified fatty acids (NEFA) and markers of oxidative damage (4-hydroxynonenal, malondialdehyde, protein carbonyls, and nitrotyrosine). Arribada nesters were bigger and had higher levels of progesterone than solitary nesters. Similarly, thyroid hormones were higher in individuals nesting in arribada than in solitary nesters, while TG and NEFA were positively correlated in arribada but not in solitary nesters. Nesting in arribada was associated with increased lipid peroxidation and protein carbonyls compared to solitary nesting. These results suggest that nesting in arribada is potentially more energetically expensive than nesting solitarily, and that oxidative stress may be a trade-off of the fitness benefits associated with arribada nesting.


Author(s):  
B. Gabriela Arango ◽  
Martha Harfush-Meléndez ◽  
José Alejandro Marmolejo-Valencia ◽  
Horacio Merchant-Larios ◽  
Daniel E. Crocker

Author(s):  
Shaya Honarvar ◽  
Micah C. Brodsky ◽  
Eric P. Van Den Berghe ◽  
Michael P. O'Connor ◽  
James R. Spotila

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