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Age and growth of the endemic Xingu River stingray Potamotrygon leopoldi validated using fluorescent dyes.
Charvet, P; Santana, F M; De Lima, K L; Lessa, R.
Afiliação
  • Charvet P; Departamento de Ecologia e Sistemática (CCEN), Universidade Federal da Paraíba (UFPB), Cidade Universitária, João Pessoa, PB, CEP 58051-090, Brazil.
  • Santana FM; Unidade Acadêmica de Serra Talhada (UAST), Universidade Federal Rural de Pernambuco (UFRPE), Serra Talhada, PE, CEP 56903-970, Brazil.
  • De Lima KL; Departamento de Pesca e Aqüicultura (DEPAq), Universidade Federal Rural de Pernambuco (UFRPE), Dois Irmãos, Recife, PE, CEP 52171-900, Brazil.
  • Lessa R; Departamento de Pesca e Aqüicultura (DEPAq), Universidade Federal Rural de Pernambuco (UFRPE), Dois Irmãos, Recife, PE, CEP 52171-900, Brazil.
J Fish Biol ; 92(6): 1985-1999, 2018 Jun.
Article em En | MEDLINE | ID: mdl-29660124
Between 2003 and 2005, vertebrae of 151 Xingu River Potamotrygon leopoldi (Potamotrygonidae) (75 males and 76 females) were analysed to derive a growth curve for this species. The disc width (WD ) was significantly different between sexes, with females measuring 149-700 mm WD and males 109-500 mm WD . The average percentage error for vertebrae readings of the whole sample was 2·7%. The marginal increment ratio (RMI ) showed an increasing trend with the highest value in November, decreasing from December on. The majority of vertebrae displaying RMI zero, occurred in September, but the annual periodicity of ring deposition throughout the year was not conclusive. Tetracycline (TCN) injected specimens were held in captivity for 13 months and displayed a fluorescent mark in vertebrae confirming a yearly periodicity of band pair formation with the translucent ring deposited in September-October. The Akaike information criterion (AIC) showed that, among the seven models considered, the best fit was obtained for the von Bertalanffy modified with W0 (where W0 = WD at birth) for both sexes. Growth parameters for females were: W0 = 149 mm; W∞ = 763·06 mm; k = 0·12 year- 1 , whereas for males: W0 = 109 mm; W∞ = 536·4 and k = 0·22 year-1 . Maximal ages were 7·2 years in males and 14·3 years in females. The species shows sexual dimorphism expressed in the growth pattern, size at maturity, longevity and asymptotic sizes. Concern for sustainability is raised due to the construction of the Belo Monte Hydroelectric Power Plant (2015 and 2016) in the State of Pará causing changes to the habitat of this species, which is endemic to the Xingu River and two of its tributaries.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Rajidae / Determinação da Idade pelo Esqueleto Tipo de estudo: Prognostic_studies Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: J Fish Biol Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
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XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Rajidae / Determinação da Idade pelo Esqueleto Tipo de estudo: Prognostic_studies Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: J Fish Biol Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido