OBSERVATIONS ON THE REPRODUCTIVE-BIOLOGY OF FEMALE HYPOSTOMUS-LUETKENI LACEPEDE 1803

Authors
MAZZONI R CARAMASCHI EP
Citation
R. Mazzoni et Ep. Caramaschi, OBSERVATIONS ON THE REPRODUCTIVE-BIOLOGY OF FEMALE HYPOSTOMUS-LUETKENI LACEPEDE 1803, Ecology of freshwater fish, 6(1), 1997, pp. 53-56
Citations number
9
Categorie Soggetti
Marine & Freshwater Biology",Fisheries
Journal title
Ecology of freshwater fish → ACNP
ISSN journal
09066691
Volume
6
Issue
1
Year of publication
1997
Pages
53 - 56
Database
ISI
SICI code
0906-6691(1997)6:1<53:OOTROF>2.0.ZU;2-#
Abstract
Seasonal observations in the gonadosomatic index and development stage s of female ovaries showed that Hypostomus luetkeni has an extended sp awning period lasting from September to February. Histological examina tions and analysis of oocyte size distributions indicated a fractional spawning. Fecundity was determined in ripe ovaries and indicated that H. luerkeni, as most other Loricariidae, spawn a small number (446-93 6 eggs.ind(-1)) of large eggs (5.2 mm).