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Growth, mortality and recruitment of Nile perch Lates niloticus (L. Centropomidae) in the Nyanza Gulf of Lake Victoria: an evaluation update
Type: Journal Article
A reassessment of the estimates of growth, mortality and recruitment patterns of Nile Perch, Lates niloticus was made based on data from commercial landings collected during the Catch Assessment Survey Programme. Two sets ...
The general von Bertalanffy growth function: possible use in the Beverton and Holt model
Type: Journal Article
Using the concept of generalized Von Bertalanffy growth formula developed by Pauly and Gasch? tz, we tried to integrate the basic equation of Beverton and Holt and to check on changes in the quantitative evaluation of ...
New functions for the analysis of two-phrase growth of juvenile and adult fishes, with application to Nile perch
Type: Journal Article
Two phases of growth can sometimes be distinguished in long-lived fish species. The first involves the growth of zooplankton-feeding juveniles and young adults. The second consists of accelerated growth of large, piscivorous ...
On improving the resolution of the recruitment patterns of fishes
Type: Journal Article
It is proposed that the "recruitment pattern" routine of the ELEFAN II program can be modified to allow, in addition to length-frequency data, the use of "restructured" data files. An example, based on Oreochromis niloticus ...
A note on the inverse function of the von Bertalanffy growth function
Type: Journal Article
Parameter estimates of the von Bertalanffy growth function (VBGF) and its inverse function, based on length-at-age and age-at-length data for Tilapia rendalli (Cichlidae) and Salmo trutta (Salmonidae) were derived using a ...
Estimation of natural mortality from selection and catch length-frequency data: a modification of Munro's method and application example
Type: Journal Article
Details are given of the modification of Munro's method for the estimation of natural mortality from length-frequency data. An example is given of application of the method using length-frequencies of brown trout (Salmo ...