Evidence of regression of fibropapillomas in juvenile green turtles Chelonia mydas caught in Niterói, southeast Brazil

Guimarães, Suzana Machado; Gitirana, Humberto Mas; Wanderley, Amanda Vidal; Monteiro‐Neto, Cassiano; Lôbo-Hajdu, Gisele

doi:10.3354/dao02542

Cited by 37 publications

(20 citation statements)

References 19 publications

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“…Previously documented in Hawaii, tumour regression was also described in Brazil (Machado Guimarães et al 2013) and Puerto Rico (Patrício et al 2016). For Puerto Rico green turtles, FP does not appear to be influenced by demographics (Patrício et al 2011(Patrício et al , 2016 and may not always alter growth rates .…”

Section: Q11 What Constitutes a Healthy Turtle?mentioning

confidence: 68%

Are we working towards global research priorities for management and conservation of sea turtles?

Rees¹,

Alfaro‐Shigueto²,

Barata³

et al. 2016

Endang. Species. Res.

248

161

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In 2010, an international group of 35 sea turtle researchers refined an initial list of more than 200 research questions into 20 metaquestions that were considered key for management and conservation of sea turtles. These were classified under 5 categories: reproductive biology, biogeography, population ecology, threats and conservation strategies. To obtain a picture of how research is being focused towards these key questions, we undertook a systematic review of the peer-reviewed literature (2014 and 2015) attributing papers to the original 20 questions. In total, we reviewed 605 articles in full and from these 355 (59%) were judged to substantively address the 20 key questions, with others focusing on basic science and monitoring. Progress to answering the 20 questions was not uniform, and there were biases regarding focal turtle species, geographic scope and publication outlet. Whilst it offers some meaningful indications as to effort, quantifying peer-reviewed literature output is ob viously not the only, and possibly not the best, metric for understanding progress towards informing key conservation and management goals. Along with the literature review, an international group based on the original project consortium was assigned to critically summarise recent progress towards answering each of the 20 questions. We found that significant research is being expended towards global priorities for management and conservation of sea turtles. Although highly variable, there has been significant progress in all the key questions identified in 2010. Undertaking this critical review has highlighted that it may be timely to undertake one or more new prioritizing exercises. For this to have maximal benefit we make a range of recommendations for its execution. These include a far greater engagement with social sciences, widening the pool of contributors and focussing the questions, perhaps disaggregating ecology and conservation.

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Section: Q11 What Constitutes a Healthy Turtle?mentioning

confidence: 68%

Are we working towards global research priorities for management and conservation of sea turtles?

Rees¹,

Alfaro‐Shigueto²,

Barata³

et al. 2016

Endang. Species. Res.

248

161

View full text Add to dashboard Cite

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“…Additionally, prevalence of FP fluctuated from 0 to 75% in netted green turtles at 2 foraging sites in Puerto Rico from 1997 to 2014, with complete regression of visible tumors in individuals occurring within 2.7 yr on average (Patrício et al 2016). FP tumor presence (31%, 2008 and regression has been documented in Brazil (Guimarães et al 2013). In Australia, 7.9% of green turtles captured in Moreton Bay (1990Bay ( −1992 had FP tumors (Limpus et al 1994).…”

Section: Discussionmentioning

confidence: 99%

Fibropapillomatosis prevalence and distribution in green turtles Chelonia mydas in Texas (USA)

Shaver¹,

Walker²,

Backof³

2019

Dis. Aquat. Org.

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Fibropapillomatosis (FP) is a neoplastic disease that can result in debilitating tumors in sea turtles. Initially identified in Florida, USA in 1937, it has since been detected in green turtle Chelonia mydas populations globally. FP was first identified and confirmed in Texas, USA in 2010. No FP tumors were documented in Texas prior to that year, though many green turtles were encountered and examined using standardized procedures since 1980. The present study was undertaken to identify temporal and spatial trends of FP prevalence in Texas since 2010. From 2010 through 2018, 1919 stranded or incidentally captured green turtles were documented with FP in Texas. FP prevalence was significantly correlated with year, hypothermic stunning, geographic region, and turtle size, as determined by logistic regression. FP was documented in < 4.0% of the green turtles examined in Texas from 2010 to 2015, increasing to 21.6% in 2016, 27.3% in 2017, and 35.2% in 2018. More than twice as many hypothermic stunned green sea turtles had FP tumors as compared to those that were not hypothermic stunned. In Texas, FP was most prevalent in south Texas, particularly in the Laguna Madre, and associated channels. FP was more prevalent in turtles with straight carapace lengths 40.0−69.9 cm. The impact of this disease on green turtle population recovery in Texas is not yet apparent.

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“…The histopathological analysis revealed that the characteristics and proliferative changes observed in the skin lesions were similar to FP associated with viral particles [27], possibly a herpesvirus [11]; these proliferative changes indicates that are benign neoplasms. However, in this case the lesions could not be monitored to specify its change on size, preventing us to specify the stage of development of the FP [6] or if it was in phase of tumor regression [7]; even so, the neoplasms were registered as 1 (less than 5 cm), according to the classification of green turtles FP's proposed in [6,42] These cases are the fourth and fifth (respectively) recorded and studied by HP in the peninsula, but the first in an EPGT at LOL and the second in an olive ridley turtle at the GU. The classification of FP presents differences in each region, so it is necessary to categorize its presence in sea turtles in the area.…”

Section: Discussionmentioning

confidence: 99%

“…Fibropapillomatosis (FP) is an infectious disease considered to be one of the primary causes of mortality for many green turtle stokes around the world [2] and is commonly associated with a herpesvirus [3] identified as Chelonid herpesvirus type 5 (ChHV-5) [4]. This disease is characterized by the presence of simple to multiple benign fibroepithelial tumors [5] varying from 0.1 to ≥30 cm in diameter [5,6] and can present spontaneous regression [7]. Histologically, it is characterized by a papillary epidermal hyperplasia supported on broad stalks of fibrovascular stroma [8].…”

Section: Crossmarkmentioning

confidence: 99%

Gross examination and Histopathology of Fibropapillomas in Chelonia mydas and Lepidochelys olivacea from Baja California Sur, Mexico

Reséndiz¹,

Fernández-Sanz²,

Torres³

et al. 2019

J Histol Histopathol

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Background: Fibropapillomatosis (FP) is an infectious disease considered to be one of the primary causes of mortality for many green turtles stokes around the world, commonly associated with a herpesvirus identified as Chelonid herpesvirus type 5 (ChHV-5). To detect the viral particles associated with the specific lesions of FP, Histopathology, Transmission Electron Microscopy and PCR studies have been used; in this manuscript we described by gross Pathology and Histopathology cutaneous FPs in an eastern Pacific Green Turtle (EPGT) C. mydas from Ojo de Liebre lagoon (LOL) and in an olive ridley turtle L. olivacea from the Gulf of Ulloa (GU) in the Baja California Peninsula. Methods: During September and December 2016, olive ridley turtles were caught at GU and EPGTs were caught at LOL. A physical examination adapted for sea turtles was carried out and morphometric data was taken. Two tissue samples (2 and 3 cm aprox. respectively) from two turtles that presented neoplasms were recollected; the lesions were completely resected, fixed in formalin and sent to the Marine Botany Laboratory at the Autonomous University of Baja California Sur to be processed with the Histopathology routine technique and were reviewed using a microscope with ×10 and ×40 lenses. Results: One olive ridley turtle (adult female) caught at GU, presented a FP-like lesion at the right eye, in addition to two FP-like lesions at the ventral part of the right anterior flipper; in LOL, an EPGT (sub adult female), presented a FP-like lesion at the ventral base of the right anterior flipper. The examination of the nodules by light microscopy revealed orthokeratotic hyperkeratosis, epidermal hyperplasia with areas of edema, dermal papillary differentiation, increased fibroblasts in the dermis and mild infiltration of lymphocytes arranged at the perivascular level and at the dermo-epidermal junction. Conclusions: It is important and necessary to complement this kind of studies with the use of PCR to determine the role of the disease causative agent in the development of the neoplasms. Monitoring along the west coast of Mexico is essential to determine the presence, prevalence and incidence of FP and other diseases.

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Evidence of regression of fibropapillomas in juvenile green turtles Chelonia mydas caught in Niterói, southeast Brazil

Cited by 37 publications

References 19 publications

Are we working towards global research priorities for management and conservation of sea turtles?

Are we working towards global research priorities for management and conservation of sea turtles?

Fibropapillomatosis prevalence and distribution in green turtles Chelonia mydas in Texas (USA)

Gross examination and Histopathology of Fibropapillomas in Chelonia mydas and Lepidochelys olivacea from Baja California Sur, Mexico

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