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| Pereira, Marcelo Maia; Universidade Federal de Viçosa; Ribeiro Filho, Oswaldo Pinto; Universidade Federal de Viçosa.; Zanuncio, Jose Cola; Universidade Federal de Viçosa; Navarro, Rodrigo Diana; Universidade de Brasília; Seixas Filho, Jose Teixeira; Fundação Instituto de Pesca do Rio de Janeiro; Ribeiro, Christiano Demétrio de Lima; Universidade Federal de Viçosa. |
| Evaluation of semen characteristics after hormonal induction of the bullfrog could provide valuable information on the gametes of this species, which may be useful for projects related to artificial fertilization, animal improvement, and cryopreservation. Bullfrog males were induced to spermiate with buserelin acetate (GnRHa), and their semen was subsequently analyzed. GnRHa (0.4 μg) was administered to the bullfrog males with secondary sexual characteristics such as weight > 200 g, yellow chin, nuptial callus, and amplexus reflex, being the semen collected after 60 min. The semen volume was 5.76 mL, light-colored. The other characteristics of the semen were: vigor of 4.80, motility of 93%, concentration of 14.24 × 106 mL-1, and content of normal... |
| Tipo: Reprodução |
Palavras-chave: 5.06.03.00-0; 5.05.04.00-2; 2.04.06.00-2 reproduction; Semen; Spermatozoid; Sperm motility Aquicultura. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/14780 |
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| Zanatta, Naiara; Universidade Estadual de Maringá; Cionek, Vivian de Mello; Universidade Estadual de Maringá; Benedito, Evanilde; Universidade Estadual de Maringá. |
| This study aimed to characterize the reproductive strategies of fish from first order streams. Samplings were performed every three months from June 2008 to March 2009, using electric fishing at three streams: Conceição, Scherer and Jurema, located in the municipalities of Diamante do Norte and Amaporã, Paraná State, Brazil. We obtained the total weight (g), standard or total length (cm), sex and maturation stage for each specimen. Limnological data were obtained with portable equipments. The minimum length at first maturation was established for each population, and reproduction period was determined by analyzing the distribution of maturation stages. The sex ratio was obtained and tested (X2) for significant differences. Eight species were analyzed and... |
| Tipo: Reprodução |
Palavras-chave: 2.00.00.00-6 upper Paraná river basin; Sex ratio; Conservation unit; Reproductive stages 2.05.02.00-1. |
| Ano: 2013 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10932 |
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