Browsing WorldFish Community by Issue Date
Now showing items 561-580 of 5196
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A program for constructing length-converted growth curves when growth is seasonal
(1991)Type: Journal ArticleFollowing Sparre's (1990) demonstration that length-converted catch curves overestimate total mortality when growth is seasonal, Pauly (1990) presented a method for constructing length-converted growth curves that allow ... -
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). -
Who's working on fishpond aeration
(1991)Type: Journal ArticleThe findings are provided of a literature search conducted on the topic of fishpond aeration, using ASFA for the period 1971-1990 and the ICLARM library and professional staff collection. A total of 97 articles were found. ... -
On length-weight relationships. Part II: Computing mean weights from length statistics
(1991)Type: Journal ArticleAssuming a known length-weight relationship, the formula for calculating the mean weight from grouped length statistics is recapitulated. Then a simple analytical method for calculating mean weight from basic length ... -
The context of small-scale integrated agriculture-aquaculture systems in Africa: a case study of Malawi
(1991)Type: Working PaperA study summarizing available literature on aquaculture and small-scale aquaculture in Malawi. It gives a national case study of one African context in which small-scale aquaculture has developed, and in which integrated ... -
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 -- ... -
Time recovery for exploited fish populations based on surplus yield models
(1991)Type: Journal ArticleA new method to estimate the time recovery of exploited population based on M.B. Schaefer's theory is proposed. The parameters used as follows: current population size (alphaP sub( infinity )'), target population level ... -
Households, agroecosystems and rural resources management: a guidebook for broadening the concepts of gender and farming systems
(1991)Type: BriefScientists working to provide farmers with new technologies often have a narrow view of the farming systems in which their technologies must fit. Conventional stereotypes also govern their views on gender. The exercises ... -
Growth, mortality and length-weight parameters for some Kuwaiti fish and shrimp
(1991)Type: Journal ArticleAs a (small) contribution toward reestablishing communication between Kuwait-based fishing research and other research conducted elsewhere in the tropics, the growth parameter estimates and the "a" and "b" values ... -
Tabular data on marine fishes from Southern Africa. Part 1: Length-weight relationships
(1991)Type: Journal ArticleThe parameters a and b of length-weight relationship of the form W = aLˆb were computed for 122 species from graphs presented in R.van der Elst's "Guide to the Common Sea Fishes of Southern Africa". -
Growth performance in fishes: rigorous description of patterns as a basis for understanding causal mechanisms
(1991)Type: Journal ArticleThe origins and features of the growth performance index Phi ' are reviewed, emphasizing its ability to express the underlying common characteristics of a family of growth curves. Some other aspects of Phi ' are discussed, ... -
The Genetic Improvement of Farmed Tilapias (GIFT) project: the story so far
(1991)Type: Journal ArticleThis issue of Naga features three articles about a project on the Genetic Improvement of Farmed Tilapias (GIFT) and a related article on the trend to genetic deterioration in some carp hatcheries. The first is on the genesis ... -
Singapore resolution on waste management in the coastal areas of the ASEAN region
(1991)Type: ReportAn account is given of the principles recommended to be incorporated into the environmental policies of ASEAN, concerning sound waste management strategies, as discussed at the conference on waste management in the coastal ... -
Environmental impact of the golden snail (Pomacea sp.) on rice farming systems in the Philippines
(1991)Type: Conference ProceedingsA summary report of the workshop held at the Freshwater Aquaculture Center, Central Luzon State University, Nueva Ecija, Philippines, on 9-10 November 1989. It discusses the effects wrought by the golden snail since its ... -
A guide to ECOPATH II software system (version 2.0)
(1991)Type: ManualThis guide documents the use and background of the ECOPATH II software system written for MS DOS computers for straightforward construction and parametrization of steady-state trophic models of aquatic ecosystems. ECOPATH ... -
Aquaculture technology research for smallholder farmers in rural malawi
(1991)Type: Conference PaperIn order to develop aquaculture systems and technologies relevant to the maize-based famring system in rural Africa, ICLARM is conducting farmer-participatory research in Malawi. This involves farmer-researcher interaction ... -
Approaches to national fish breeding programs: pointers from a tilapia pilot study
(1991)Type: Journal ArticleDetails are given of a framework for developing breeding programmes using experience from the Genetic Improvement of Farmed Tilapias project which focussed on Nile tilapias (Oreochromis niloticus ). The following aspects ... -
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 and mortality of Indian mackerel Rastrelliger kanagurta (Scombridae) in the Visayan Sea, Central Philippines
(1991)Type: Journal ArticleThe growth of Indian mackeral Rastrelliger kanagurta in the Visayas Sea, central Philippines, is estimated, based on length-frequency data from 1983 to 1987 and the Compleat ELEFAN program. Results are TL8 = 38 cm and K = ... -
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 ...
