Maturidade do ov芍rio no cascudo Hypostomus strigaticeps (Siluriformes, Loriicaridae) = Ovarian organization and maturity stages of armored catfish Hypostomus strigaticeps (Siluriformes, Loriicaridae)

作者：Erico Luis Hoshiba Takahashi; Roberto Goitein; Laura Satiko Okada Nakaghi

来源：Acta Scientiarum - Biological Sciences, 2008.

• peixe
• reprodu o
• g nadas
• histologia
• fish
• reproduction
• gonad
• histology

No presente trabalho, foi estudado o desenvolvimento ovariano do cascudo Hypostomus strigaticeps. Foram coletadas 332 f那meas, em coletas mensais, de julho de 2002 at谷 junho de 2004, no rio Corumbata赤, Estado de S o Paulo, bacia do Paran芍. Os ov芍rios foramprocessados com t谷cnicas histol車gicas de rotina, com inclus o em parafina, corte com 5 米m de espessura e colora o em hematoxilina-eosina. Foram observados seis tipos de ov車citos: Cromatina-nucl谷olo, Perinucleolar, Alv谷olo-cortical, Vitelog那nico, Maduro e Atr谷sico. Foiconstru赤da uma escala de maturidade, a partir de observa es microsc車picas, macrosc車picas e do 赤ndice gonadossom芍tico com quatro fases: Repouso, Matura o, Maduro e Desovado. This work studied the ovarian development of the armored catfish Hypostomus strigaticeps. Between July 2002 and June 2005, 332 females were collected monthly from the Corumbata赤 River, S o Paulo State 每Brazil. The ovaries were processed using routine histological techniques 每 paraffin inclusion and 5 米m thick sections stained in hematoxylin-eosin. Six types of oocytes were observed: Chromatin-nucleolus, Perinucleolar, Cortical-alveolus, Vitellogenic, Ripe andAtresic. Four maturity stages were created based on macroscopic and microscopic morphological observations, as well as on analysis of the gonadossomatic index (GSI): Rest, Maturation, Ripe and Spawned.