WorldFish Community: Recent submissions
Now showing items 2361-2380 of 5196
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The South China Sea: analyzing fisheries catch data in an ecosystem context
(1991)Type: Journal ArticleThe South China Sea is an important fishing area with an annual harvest of some 5 million tonnes, or 10% of the catches jointly taken by the developing nations of the world. Details are given of a model of the area describing ... -
A model to determine benefits obtainable from the management of riverine fisheries of Bangladesh
(1991)Type: ReportAn operational model was derived which can be used to analyze the performance of Bangladesh riverine fisheriesunder different simulated alternatives of technical, economic and biological conditions. Functions and parameters of ... -
An overview of objectives for fisheries management
(1991)Type: Journal ArticleA brief description of modern aims and targets for fisheries management that have been used recently is given. This covers MSY, F<sub>max</sub>, F<sub>msy</sub>,F<sub>0.1</sub>, spawning stock maintenance, buffer stock ... -
Population dynamics of the freshwater clam Galatea paradoxa (Donacidae) in the Cross River, Nigeria
(1991)Type: Journal ArticleThe growth of freshwater clam Galatea paradoxa (Born) from the Cross River, Nigeria, was studied based on a count of growth checks on shells, presumed to be laid down annually. Mean lengths at ages 1 to 5 were 4.1 cm, 5.9 ... -
Catchability estimates for simple fishing gears in small-scale fishponds
(1991)Type: Journal ArticleThe findings are presented of experiments conducted at the Domasi Experimental Fish Farm in Zomba, Malawi to evaluate the hook-and-line fishing gear and cover pot techniques for harvesting tilapias (Oreochromis shiranus ... -
An assessment of the status of the Ivorian purse seine fishery of Sierra Leone, 1970-78
(1991)Type: Journal ArticleA time series of catch and effort data (1970-78) of the Ivorian purse seine fishery in Sierra Leone waters was analyzed using the Schaefer production model. The regression of C/f on effort was significant and the resulting ... -
Correction to the Beverton and Holt Z-estimator for truncated catch length-frequency distributions
(1991)Type: Journal ArticleA method for estimating the instantaneous mortality rate (Z) is presented which was developed from a truncated equation for average length. The model has zero bias at equilibrium, but has no explicit solution for Z so that ... -
Population dynamics of Saurida elongata and S. undosquamis (Synodontidae) in the southern Gulf of Thailand
(1991)Type: Journal ArticleLength-frequency data on Saurida elongata and S. undosquamis (Synodontidae) from bottom trawl survey conducted in 1984 in the Southern Gulf of Thailand were analyzed using the Compleat ELEFAN software. The seasonal pattern ... -
Bias in the Wetherall estimates of Z/K and L due to population disequilibria
(1991)Type: Journal ArticleThe method of Wetherall (1986, Fishbyte 4(1):12-14) for estimating Z/K and L sub( infinity ) from length-frequency data sampled from a population in equilibrium (constant recruitment and mortality) was examined through ... -
Supply response functions of two fish species in the Arabian Gulf area
(1991)Type: Journal ArticleA polynomial distributed lag model was fitted to monthly fish production data from the Arabian Gulf, Saudi Arabia, inorder to determine the nature of the lagged output response resulting from a change in fish price. Results ... -
Growth of the checkered puffer Sphoeroides testudineus: postscript to papers by Target and Pauly Ingles
(1991)Type: Journal ArticleJ. Ingles and D. Pauly presented at the Fourth International Coral Reef Symposium a seasonally oscillating growth curve for the puffer Sphoeroides testudineus (Tetraodontidae), based on length-frequency data collected in ... -
Exploitation of the dolphin-fish Coryphaena hippurus L. off Ecuador: analysis by length-based virtual population analysis
(1991)Type: Journal ArticleDolphin-fish Coryphaena hippurus in the east Central Pacific are principally exploited by Ecuador. A length-based virtual population analysis of this fishery was sensitive to assumed values of growth parameters in ... -
Training resource book for participatory experimental design: report of a Research Design Workshop on Participatory Design of On-farm Experiments of the ICAR/IRRI Collaborative Rice Research Project
(1991)Type: BookThis book carries on from previous volumes on agro-ecosystem mapping and farming systems diagnosis (see TN2 and TN3). -
Wall-to-wall fieldwork: some guidelines for secondary data collection in developing countries
(1991)Type: Journal ArticleA discussion is presented on the usefulness of secondary data in research in the field of agriculture, considering implications for the fisheries and aquaculture sectors. Four categories of secondary data are examined -- ... -
On China's lake fisheries development
(1991)Type: Journal ArticleAn account is given of the current situation regarding the lake fisheries and fish culture practices in China. The modern lake fisheries take advantage of the 3-D spaces of lakes to fully develop the resources. Currently, ... -
Who's working on Mugil culture
(1991)Type: Journal ArticleThe findings are presented of a survey conducted regarding research on Mugil culture; emphasis was given to publications from the tropics and subtropics, particularly from developing regions. The literature search used ... -
Charts for the rapid estimation of percentages of plants and/or animals in samples
(1991)Type: Journal ArticleThe need to estimate percentages and/or numbers occurs frequently during practical research work; accurate but rapid estimates can be useful when planning research programmes. Charts are provided that may be used as a ... -
Who's working on freshwater cage culture? (An update)
(1991)Type: Journal ArticleWhile traditional fishing gear is usually ideal for a region, improvements are always possible. Superior performance synthetic materials have almost universally replaced traditional fishing nets and lines. The development ... -
The coastal environmental profile of South Johore, Malaysia
(1991)Type: ReportThis profile provides baseline data on all aspects of South Johore's coastal environment as a tool for planners in designing an integrated coastal area management (CAM) plan. It contains 12 chapters which provide background ... -
Recherche et formation pour le developpement des systemes de production integree agriculture-elevage-pisciculture en zone tropicale
(1991)Type: Working PaperThere is a vast potential for Asia's numerous and needy small-scale farmers to enjoy the benefits of integration of aquaculture into farming systems. This publication attempts to create a framework for an interdisciplinary ...
