ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Lake Victoria Fisheries Research Project | Jinja, Uganda
    In:  http://aquaticcommons.org/id/eprint/4955 | 424 | 2013-10-27 12:07:03 | 4955 | Lake Victoria Fisheries Organization
    Publication Date: 2021-07-07
    Description: Catch and effort assessment surveys have been used to assess trends in fish landings in Kenyan waters of Lake Victoria since 1976. Landings reached a maximum of 200000 t annually in 1989-1991 as Nile perch, Lates niloticus (L.), catches increased due to an expansion in stock size and increased fishing effort. CPUE peaked at 180 kg boat day-1 in 1989 and decreased thereafter with increasing effort. By 1998 total Nile perch catches were half those at the beginning of the decade despite increased effort. Catches of Rastrineobola argentea (Pellegrin) have levelled off despite increased effort.
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/99/07
    Keywords: Biology ; Fisheries ; Information Management ; Africa ; Kenya ; stock assessment ; data collection ; data report ; artisanal fisheries
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 78-91
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2021-05-19
    Description: Wetlands in most parts of the world are under threat of over-exploitation partly because their socio-economic value is not well known. Yala Wetland, the largest freshwater wetland in Kenya, with a large part of it bordering Lake Victoria’s shoreline, faces even greater threats of extinction. This wetland measures about 17,500 ha and is host to a number of indigenous fish species, animals and plants which are exploited by the local communities for subsistence and commercial purposes.There has been pressure to reclaim portions of this wetland for agricultural activity. So far, 2,300 ha has, indeed, been drained for commercial agriculture. Furthermore, it is difficult to control effort in the exploitation of the remaining wetland resources since the economically sustainable yields are undetermined. This study was undertaken to close down the information gaps and generate relevant data for managing the wetland. Data for the study were collected in two phases, first a rapid appraisal exercise, then a monitoring program for 6 months in 2004-2005. Several variables were monitored during the study period, including; fish catch and composition, commercial yield of macrophytes, demand and price levels of wetland resources, levels of effort for exploiting wetland resources and other relevant ecological variables. This paper presents the results of the study including, the composition and fish catch levels, the quantities of harvested and marketed macrophytes and other resources. Using these, the annual economic values of the Yala Wetland resources is determined. In addition the paper gives determinants of exploitation effort and the characteristics of wetland exploiters. The paper proposes management options under which the wetland can be managed.
    Description: Published
    Keywords: Wetlands ; Inland waters ; Overexploitation ; Wetlands ; Inland waters ; Overexploitation ; Socioeconomic aspects ; Fishery resources ; Resource management ; Water reservoirs ; Monitoring systems ; Land use ; Resource conservation ; Environment management ; Protected resources ; Freshwater lakes ; Inland fisheries ; Lake fisheries
    Repository Name: AquaDocs
    Type: Proceedings Paper , Non-Refereed
    Format: 79833 bytes
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2021-05-19
    Description: Catch and effort assessment surveys have been used to assess trends in fish landings in Kenyan waters of Lake Victoria since 1976. Landings reached a maximum of 200000t annually in 1989-1991 as Nile perch, Lates niloticus (L.), catches increased due to an expansion in stock size and increased fishing effort. CPUE peaked at 180kg boat day-1 in 1989 and decreased thereafter with increasing effort. By 1998 total Nile perch catches were half those at the beginning of the decade despite increased effort. Catches of Rastrineobola argentea (Pellegrin) have levelled off despite increased effort.
    Description: Published
    Keywords: Fishery management ; Stock assessment ; Data collections ; Artisanal fishing ; Catch/effort ; Fishery data ; Fishing effort ; Freshwater fish ; Inland fisheries
    Repository Name: AquaDocs
    Type: Report Section , Not Known
    Format: pp.78-91
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    facet.materialart.
    Unknown
    Fisheries Data Working Group of the Lake Victoria Fisheries Research Project | Jinja
    In:  http://aquaticcommons.org/id/eprint/3747 | 424 | 2011-09-29 16:57:20 | 3747 | Lake Victoria Fisheries Organization
    Publication Date: 2021-06-29
    Description: Annual catches of fish in Lake Victoria, Kenya from 1976-1998 are assessed, catches from 5-15 boats selected randomly from targeted landing sites were recorded. Twenty three of the 256 Kenyan landing sites were covered by the survey. Selection of landing sites was not random but rather influenced by the presence of infrastructure and accomodation. Parameters recorded for each sampled fishing boat were: number of crew, gear type, size, time and duration of fishing. Catches were sorted into species and weighed
    Description: Lake Victoria Fisheries Research Project Phase II
    Description: LVFRP/TECH/99/06
    Keywords: Fisheries ; Kenya ; Lake Victoria ; artisanal fishing ; catch/effort ; gear selectivity ; lake fisheries ; landing statistics ; species diversity ; stock assessment
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 73-78
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...