Browsing WorldFish Community by Issue Date
Now showing items 501-520 of 5196
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A draft guide to the ECOPATH II program (ver. 1.0)
(1990)Type: ManualThis guide documents the use and background of a program written for MSDOS Computers, in QUICKBASIC 4.5, for straightforward construction and parametrization of steady-state trophic models of aquatic ecosystems. The ECOPATH ... -
The applicability of ELEFAN for use in analyzing three species of deepwater snappers in Tonga (Etelis coruscans, Pristipomoides flavipinnis and P. filamentosus, Fam. Lutjanidae)
(1990)Type: Journal ArticleAn attempt to fit the von Bertalanffy growth equation to three species of deep sea snappers using the ELEFAN method was unsuccessful, mainly because the fish are slow-growing, long lived species. Problems were also encountered ... -
Training resource book for farming systems diagnosis: process documentation of an experiential learning exercise in farming systems diagnosis of the ICAR/IRRI Collaborative Research Project
(1990)Type: BookThis book leads on from agro-ecosystems mapping (TN2 ). The book focuses on farmer participatory tools for researchers, especially on the diagnosis of farming systems problems. -
Growth, mortality and recruitment of exploited small pelagic fishes in the Gulf of California, Mexico
(1990)Type: Journal ArticlePreliminary, length-based von Bertalanffy growth parameter estimates for Sardinops caeruleus, Opisthonema libertate, Scomber japonicus, Etrumeus teres, and Engraulis mordax, caught in the pelagic fishery based in Guaymas, ... -
Farmers' attitudes in Malawi to the use of excreta in fish farming
(1990)Type: Journal ArticleThe findings are presented of a survey conducted in Malawi to determine the acceptability by fish farmers of raisingfish in excreta-fed ponds. The use of livestock excreta appeared to be acceptable to the majority of ... -
Freshwater prawn farming trials in Bangladesh
(1990)Type: Journal ArticleDetails are given of pond trials conducted in Bangladesh regarding the culture of freshwater prawn (Macrobrachium rosenbergii ). Integrated rice and prawn farming systems were also experimented and results indicated that ... -
Water quality research or water quality checking: proposed guidelines
(1990)Type: Journal ArticleA simple plan is outlined to assist in the design of water quality research and monitoring programmes at aquacultureresearch stations. Before monitoring any programme, a decision on the goals of the aquaculture research to ... -
Techniques to produce 100% male tilapia
(1990)Type: Journal ArticleA discussion is presented on endocrine sex reversal and chromosome manipulation techniques for producing 1005 male tilapia. Details are given of methods for the administration of steroids and the induction of ploidy. -
Computer-aided approaches to identification. III: (Conclusion) . Modern databases
(1990)Type: Journal ArticleModern databases can be successfully used to develop computer-based identification systems. In a first case study, fish larvae were identified with an average of three easily obtained characters. In a second case study, ... -
Measuring ICLARM's impact on research and researchers
(1990)Type: Journal ArticleFor a research organization such as ICLARM which carries out long-term basic research, justifying money spent can be a difficult exercise. This articles examines different ways by which impact of ICLARM research can be measured. -
Estimating the food consumption of fishes: one step in linking a species with its ecosystem
(1990)Type: Journal ArticleDetails are given of a new software package MAXIMS which may be used to estimate the daily food consumption of fish. The software estimates the feeding times, the rates of ingestion and evacuation and related parameters. ... -
The pond refuge in rice-fish systems
(1990)Type: Journal ArticleSmall fishponds on irrigated and rainfed rice farms may be used by farmers as pond refuges to hold fish that foragein the ricefield, for breeding and nursing purposes, and for holding fish after rice harvesting. The pond ... -
The use of surplus-yield models in the economic analysis of a fishery
(1990)Type: Journal ArticleDiscounted cash flow techniques, as typically employed in the evaluation of fishery projects, employ constant cost and revenue streams over the duration of the project. The implicit assumption is that additional effort in ... -
Problems in estimating growth parameters of the wahoo Acanthocybium solandri (Scombridae) using the ELEFAN 1 program
(1990)Type: Journal ArticlePlots of Rn, the goodness-of-fit index of teh ELEFAN I program versus K can be used jointly with fixed values of the other growth parameters to identify "optimum values" of K. This is here illustrated using data on wahoo ... -
Down to earth thoughts on conserving aquatic genetic diversity
(1990)Type: Journal ArticleA discussion is presented on the topic of maintaining genetic diversity in aquatic ecosystems, considering the various threats caused by irreversible damage or loss to the environment. The current situation in aquaculture ... -
Who's working on giant clam culture?
(1990)Type: Journal ArticleAn examination is made of the literature on giant clam (Tridacna ) culture methods induced spawning, larvae, larval and post-larval rearing and socioeconomics. ASFA and the ICLARM library and professional staff collections ... -
Reproductive season of the Caribbean spiny lobster Panulirus argus in the coastal waters of northern Brazil
(1990)Type: Journal ArticleThe 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 ... -
Is ANOVA powerful enough for analyzing replicated pond expriments?
(1990)Type: Journal ArticleAquaculture pond experiments, like agricultural crop trials, are often designed according to the statistical rules of replication and randomization: several treatments are applied to a number of experimental units (in this ... -
Can we use traditional length-based fish stock assessment when growth is seasonal?
(1990)Type: Journal ArticleBased 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 ... -
Population dynamics of Metapenaeus ensis (Penaeidae) in the Gulf of Papua, Papua New Guinea
(1990)Type: Journal ArticleGrowth, total mortality and seasonality of recruitment of male Metapenaeus ensis (Penaeidae) were determined based on length-frequency data (n = 9007) collected in 1988 in the Gulf of Papua, Papua New Guinea.
