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Now showing items 21-30 of 30
On length-weight relationships. Part I: Computing the mean weights of the fish in a given length class
Type: Journal Article
When working with length frequency date, we often need to compute the mean weights of the fish in the various classes. This article outlines one of the methods used.
The pattern of fish trade
Type: Journal Article
An account is given of the general pattern regarding trade in fish products. Developed countries import more than they export, whereas developing countries import less. Problems involved and remedies are discussed, considering ...
Growth, reproduction and mortality of the sea hare Dolabella auricularia (Gastropoda: Aplysiidae) in the Central Visayas, Philippines
Type: Journal Article
The growth parameters W infinity and K of the von Bertalanffy growth equation were estimated from size-frequency data of the sea hare D. auricularia using an objective, computer-based method. The results obtained from two ...
On improving operation and use of the elefan programs. part 3, correcting length-frequency data for the effects of gear selection and/or incomplete recruitment
Type: Journal Article
One important feature of length€”frequency data that is usually ignored when data are collected for subsequent estimation of growth and various related parameter estimates is that length€”frequency data are necessarily ...
Rice terraces and fish: integrated farming in the Philippines
Type: Journal Article
A brief account of rice fish culture in the Ifugao Province, northern Luzon, Philippines was presented.
A simple method for estimating the food consumption of fish populations from growth data and food conversion experiments
Type: Journal Article
A multiple-regression extension of the basic model is presented which accounts for the impact of factors other than body weight on values of K1 and p. This method is illustrated with an analysis of data on dab (Limanda limianda).
A mechanism for the juvenile-to-adult transition in fishes
Type: Journal Article
The mechanisms used by physiologists and fishery biologists to explain why fish become mature are shown to be wanting. The hypothesis is presented that diminishing oxygen supply per unit weight serves in growing fish as ...
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 ...
Growth of grey triggerfish Balistes capriscus, based on growth checks of the dorsal spine
Type: Journal Article
An estimation is given of growth parameters of grey triggerfish (Balistes capriscus ) occurring off the coast ofGhana. Growth was estimated by observing annuli in the dorsal spine. From the distribution of observed length ...
Length-converted catch curves: a powerful tool for fisheries research in the Tropics (III: conclusion)
Type: Journal Article
A method is described for the determination of the selection curve of fishing gear from the shape of the ascending arm of a length-converted catch curve and growth parameters.