Population structure and reproductive biology ofSchilbe intermedius(Teleostei: Schilbeidae) in the Pendjari River, Benin

Autor:	Antoine Chikou, S Ahouansou Montcho, Karl Eduard Linsenmair, Philippe Laleye
Rok vydání:	2011
Předmět:	Teleostei biology Ecology Population structure Zoology Fish reproduction Schilbe intermedius Aquatic Science biology.organism_classification Fecundity Reproductive biology Schilbeidae Ecology Evolution Behavior and Systematics Sex ratio
Zdroj:	African Journal of Aquatic Science. 36:139-145
ISSN:	1727-9364 1608-5914
DOI:	10.2989/16085914.2011.589111
Popis:	This study, the first on fish reproduction in the Pendjari River, investigated aspects of the reproductive biology of Schilbe intermedius. A total of 429 females and 239 males were collected from March 2007 to February 2008. Females were larger than males and the sex ratio was 1:1.8 in favour of females. Size at first maturity was estimated to be 14.9 cm and 16.1 cm for males and females, respectively. Absolute fecundity ranged from 1 006 to 83 980 (22 421 ± 16 083) oocytes, and mean relative fecundity was 201 ± 162 oocytes g−1 of total body mass. Frequency distributions of oocyte diameter suggested synchronous development, with total spawning. Spawning lasted from June to November, coinciding with peaks in rainfall and flooding. Larger females began spawning about two months before smaller ones.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cd3ad8804275cc194f0dea26fdd8042f https://doi.org/10.2989/16085914.2011.589111 Zobrazit plný text záznamu Plný text ve formátu PDF