Premium
Observations on the reproductive biology of female Hypostomus luetkeni Lacèpéde 1803
Author(s) -
Mazzoni R.,
Caramaschi E. P.
Publication year - 1997
Publication title -
ecology of freshwater fish
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 55
eISSN - 1600-0633
pISSN - 0906-6691
DOI - 10.1111/j.1600-0633.1997.tb00143.x
Subject(s) - loricariidae , gonadosomatic index , fecundity , biology , spawn (biology) , reproductive biology , zoology , ecology , fishery , fish <actinopterygii> , demography , population , embryogenesis , embryo , catfish , sociology
— Seasonal observations in the gonadosomatic index and development stages of female ovaries showed that Hypostomus luetkeni has an extended spawning period lasting from September to February. Histological examinations and analysis of oocyte size distributions indicated a fractional spawning. Fecundity was determined in ripe ovaries and indicated that H. luetkeni , as most other Loricariidae, spawn a small number (446‐936 eggs‐ind −1 ) of large eggs (5.2 mm).