The olive ridley (Lepidochelys olivacea) is the most abundant of all seven sea turtles, found across the tropical regions of the Atlantic, Pacific, and Indian Oceans in over 80 different countries ...all around the globe. Despite being the most common and widely distributed sea turtle, olive ridley populations have been declining substantially for decades. Worldwide, olive ridleys have experienced a 30–50% decline, putting their populations at risk and being considered an Endangered Species by the IUCN. Natural habitat degradation, pollution, bycatch, climate change, predation by humans and animals, infectious diseases and illegal trade are the most notorious threats to explain olive ridley populations rapidly decline. The present review assesses the numerous dangers that the olive ridley turtle has historically faced and currently faces. To preserve olive ridleys, stronger conservation initiatives and strategies must continue to be undertaken. Policies and law enforcement for the protection of natural environments and reduction in the effects of climate change should be implemented worldwide to protect this turtle species.
The Chelonid herpesvirus 5 (ChHV5) is the primary etiological agent associated with fibropapillomatosis (FP), a neoplastic disease in marine turtles. In this study, we report for the first time ChHV5 ...in marine turtles and a leech from Baja California Peninsula. Eighty-seven black, olive or loggerhead turtle species, one FP tumor and five leeches were analyzed. The tumor sample from an olive, a skin sample from a black and a leech resulted positive of ChHV5 for conventional PCR. Two viral variants were identified and grouped within the Eastern Pacific phylogenetic group, suggesting a possible flow of the virus in this region.
Fibropapilomatosis en tortugas marinas Eduardo Reséndiz; Helena Fernández-Sanz; Joelly Espinoza ...
Revista de investigaciones marinas,
06/2022, Letnik:
42, Številka:
1
Journal Article
Recenzirano
Odprti dostop
Como partícipes de ecosistemas, las tortugas marinas se enfrentan a una amplia gama de factores ambientales y de origen antropogénico que pueden ocasionarles daños, lesiones, enfermedades y en casos ...graves, la muerte. En el caso de las enfermedades, la fibropapilomatosis es el padecimiento más estudiado en estos quelonios. Esta enfermedad se caracte- riza por la presencia y desarrollo de tumores epiteliales benignos que pueden afectar a una tortuga enferma, está asociada con una infección por el alfaherpesvirus quelónido 5, y en casos graves puede ser fatal para las tortugas. El objetivo de este trabajo fue revisar el cono- cimiento actual sobre la fibropapilomatosis en tortugas marinas y proponer herramientas funcionales y validadas para su identificación, manejo, tratamiento y rehabilitación. Este documento reúne la información necesaria para conocer las características de los tumores que se presentan durante esta enfermedad en las tortugas marinas y ayuda a entender el daño que produce en los organismos afectados, lo cual permitirá actuar en eventos de fibropapilomatosis a nivel nacional e internacional. La información generada propone complementar las evaluaciones de salud de tortugas marinas, así como fortalecer los pla- nes de manejo y generar las estrategias de conservación pertinentes para estas especies y los ecosistemas donde se distribuyen. Recibido: 11-10-2021 Aceptado: 09-02-2022 Publicado: 15-06-2023 Editor temático: Julia Azanza Ricardo
Abstract Fibropapillomatosis (FP) - tumour-associated chelonid alphaherpesvirus 5 (ChHV5; Scutavirus chelonidalpha5) - is a disease that affect marine turtles around the world, and characterized by ...the formation of cutaneous tumours that can appear anywhere on the body. We carried out a thorough literature search (from 1990 to 2024) in the feeding sites of North-western Mexico, a region that hosts important habitats for feeding, development, and reproduction for five of the seven existing sea turtle species. We found 18 reports recording a total of 32 cases of FP and/or ChHV5/Scutavirus chelonidalpha5 in coastal and insular areas of North-western Mexico. Baja California Sur resulted with the highest number of cases (75%). While the first case of ChHV5/Scutavirus chelonidalpha5 infection was reported in 2004, the presence of FP tumours was reported in 2014 and became more frequent between 2019 and 2024. The affected species were black, Chelonia mydas (50%), olive ridley, Lepidochelys olivacea (46.8%) and loggerhead turtles, Caretta caretta (3.2%). Tumours occurred mainly in anterior flippers (46.1%) and neck (22.5%), and most had a nodular and verrucous appearance with a rough surface. In the study region, there is a potential sign of the emergence of the ChHV5/Scutavirus chelonidalpha5 infections and FP disease during the last 20 years, with a rapid increase during the last 10 years. As long as infections by ChHV5/Scutavirus chelonidalpha5 and the prevalence of the FP disease may be potentially influenced by anthropogenic activities, a One Health approach is needed to understand and improve sea turtles’ health.
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