The growth performance of a number of wild populations of the African catfish C. gariepinus (Clariidae) was assessed by means of the growth index ╪. The values of ╪ ranged from 2.97 to 3.67 with some of the highest values coming from the coldest lakes, suggesting that this catfish...

Based on simulated catch data, this contribution shows that standard length-converted catch curves cannot be used for accurately estimating total mortality when growth oscillates seasonally. Some implications for length-based stock assessment methodology are discussed, and the need for the...

A brief account of the USAID funded fish stock assessment collaborative Research Support Program is given, with emphasis on its Philippine module, devoted to empirical analyses, modelling and field studies aimed at improved management of exploited multispecies fish stocks.

The spawning season of the Caribbean spiny lobster Panulirus argus (Latreille) was identified based on adult specimens collected monthly off northeastern Brazil, from August 1982 to July 1988. The maturity indices used were relative abundance of females with full spermatheca, eggs or rests of...