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Comparison of serum hormone levels of captive and free-living maned wolves Chrysocyon brachyurus.
Maia, O B; Jácomo, A T A; Bringel, B A; Kashivakura, C K; Oliveira, C A; Teodoro, L O F; Silveira, L; Teixeira da Costa, M E L; Malta, M C C; Furtado, M M; Torres, N M; Mattos, P S R; Viau, P; Lima, T F G; Morato, R G.
Afiliação
  • Maia OB; Centro Nacional de Pesquisa para a Conservação dos Predadores Naturais (Cenap/ICMBio), Atibaia, SP, Brasil.
Braz J Med Biol Res ; 41(2): 176-9, 2008 Feb.
Article em En | MEDLINE | ID: mdl-18297198
Serum hormone levels were compared between captive and free-living maned wolves and seasonal variations of sex hormones were studied. Blood samples were collected from 16 male and 26 female adult animals from Brazilian zoos, and from 30 male and 24 female free-living adults to determine serum progesterone and testosterone by radioimmunoassay. Serum testosterone concentrations varied (P < 0.05) across seasons for 16 captive males, being higher in autumn (2184.7 +/- 355.1 pg/mL) than in summer (1080.7 +/- 205.4 pg/mL), winter (1270.1 +/- 276.6 pg/mL) and spring (963.9 +/- 248.1 pg/mL), although they did not differ between summer, winter and spring. Testosterone concentration of 30 free-living males differed (P < 0.05) between autumn (824.1 +/- 512.2 pg/mL), winter (14.4 +/- 8.0 pg/mL) and spring (151.9 +/- 90.5 pg/mL). Comparison between captive and free-living animals showed no difference in autumn (P > 0.05). Sixteen captive males showed higher testosterone concentration during winter and spring compared with 30 free-living animals (P < 0.05). Progesterone concentration varied among seasons in 26 captive females (P < 0.05), being higher in autumn (15.3 +/- 3.1 ng/mL) than in summer (6.6 +/- 1.5 ng/mL), winter (5.3 +/- 3.1 ng/mL) and spring (4.3 +/- 0.7 ng/mL). Progesterone concentration of 24 free-living females varied between autumn (17.1 +/- 6.0 ng/mL) and winter (1.7 +/- 0.3 ng/mL) (P < 0.05), but we could not obtain data for spring or summer. No difference in progesterone levels was observed between captive and free-living females in autumn and winter.
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Progesterona / Testosterona / Lobos / Animais de Zoológico Limite: Animals Idioma: En Revista: Braz J Med Biol Res Ano de publicação: 2008 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil
Buscar no Google
Adicionar na Minha BVS
Imprimir
XML
PubMed Links

Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Progesterona / Testosterona / Lobos / Animais de Zoológico Limite: Animals Idioma: En Revista: Braz J Med Biol Res Ano de publicação: 2008 Tipo de documento: Article País de afiliação: Brasil País de publicação: Brasil