Browsing by Title
Now showing items 3270-3289 of 5196
-
On improving operation and use of the elefan programs. part 1, avoiding "drift" of K towards low values
(1985)Type: Journal ArticleThe article proposes improvements for the ELEFAN programs describing how they may be used for optimum output, considering the von Bertalanffy growth equation and the K parameter. -
On improving operation and use of the elefan programs. part 2, improving the estimation of L
(1986)Type: Journal ArticleFour simple approaches which rely on slightly modified versions of ELEPHAN I and/or II are given for the estimation of length of fish. -
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
(1986)Type: Journal ArticleOne 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 ... -
On improving the resolution of the recruitment patterns of fishes
(1991)Type: Journal ArticleIt 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 ... -
On length-weight relationships. Part I: Computing the mean weights of the fish in a given length class
(1987)Type: Journal ArticleWhen 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. -
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 ... -
On Malthusian overfishing
(1990)Type: Journal ArticleA brief examination is made of Malthus' works during the 1800s regarding population growth, considering applications to fisheries resources and their management. -
On microcomputers vs. thinking and their respective roles in fisheries research in developing countries
(1987)Type: Journal ArticleA discussion is presented on the topic of microcomputers and fishery research in developing countries, consideringin particular the advantages of the use of computers for data storage and examination as compared to ... -
On modelling and management of capture fisheries: one view
(1996)Type: Journal ArticleSustainability of benefits from capture fisheries has been a concern of fisheries scientists for a long time. The development of fisheries management models reflects the historical debate (from maximum sustainable yield ... -
On publishing, perishing and promotion in fisheries science
(1989)Type: Journal ArticleA discussion is presented on the topic of publishing fishery information, indicating the various problems which existin current publishing systems worldwide. -
On reason, mythologies and natural resource conservation
(1987)Type: Journal ArticleScientific advice is neither generated nor received in a culturally neutral context. There are two ways by which a cultural context can emerge in which conservationists measures are considered reasonable. -
On the behavior of some proposed goal functions for ecosystem development
(1994)Type: Journal ArticleThis contribution addresses the issue of "goal functions", quantifying the state of development of ecosystems. Numerous goal functions have been proposed with the hope that once a proper goal function has been identified ... -
On the estimation of marine resource distribution of Timor-Leste by data fitting
(2020)Type: Conference PaperTracking fishing activities is a measure to understand the distribution of marine biology, the abundance of resources, and the living conditions of fishers. This research uses experiences from the voyage data recorder (VDR) ... -
On the growth, mortality and recruitment of the spiny lobster (Panulirus homarus) in Sri Lankan waters
(1993)Type: Journal ArticleMonthly length-frequency data of spiny lobster Panulirus homarus collected from the south coast of Sri Lanka during 1988-1990 were analyzed to estimate von Bertallanfy growth parameters. The asymptotic lengths estimated ... -
On the interrelationships between naturual mortality, growth parameters, and mean environmental temperature in 175 fish stocks
(1980)Type: Journal ArticleA compilation of values for the exponential coefficient of natural mortality (M) is given for 175 different stocks of fish distributed in 84 species, both freshwater and marine, and ranging from polar to tropical waters. -
On the seasonal growth, monthly recruitment and monthly biomass of Peruvian anchoveta (Engraulis ringens) from 1961 to 1979
(1984)Type: Book ChapterThe paper reports on the application to the anchoveta of a newly developed set of methods for the investigaton of exploited fish stocks. the set of methods are incorporated in the ELEFAN (Electronic Length Frequency Analysis) ... -
On the use of visual survey methods for estimating reef fish standing stocks
(1988)Type: Journal ArticleThe use of visual surveys as a means of estimating fish standing stocks is discussed with respect to reef fish. Difficulties associated with this technique are noted. Visual survey methods are relatively cheap, non-destructive, ... -
On the way to management of west Sumatra's coastal ecosystem
(2002)Type: Journal ArticleVarious impacts on the coast of the Indonesian province of West Sumatra are presented together with activities and achievements to address them, e.g. public awareness, public relations and capacity building, including the ... -
On Tonle Sap, the great lake of Cambodia
(1994)Type: Journal ArticleTonle Sap, the Great Lake of Cambodia fisheries and fish production are discussed considering also the problems affecting the lake. -
On traditional knowledge, fish and databases: a call for contributions
(1993)Type: Journal Article
