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  • Blackwell Publishing Ltd  (3)
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Publisher
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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The fishery on the Mahakam River floodplain is important and therefore heavily exploited. Mesh sizes of gillnets and beach seines have decreased rapidly in recent times, indicating that overexploitation may soon become a roblem; biological data support this. Actual and estimated yields, calculated using standard methods, are compared and the relationship of total catch to water levels determined. Annual catches were most significantly related to the number of days when water levels were 〉9.2 m above mean sea level (AMSL) in the twelve-month period beginning in May of the year previous to the catch. The relationship took the form Y = 9476.105 + 115.5967X (r = 0.92), where Y is the catch in t (metric tonnes) and X the number of days when water levels were 〉9.2 m. The consequences for future management policies are discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The Mahakam River floodplain fishery was studied between 1979 and 1990. With annual catches of 15,000–35,000 t (metric tonnes), it is one of the most productive freshwater artisanal fisheries in Indonesia. Landings are dominated by one crustacean and 15 fish species, of which five make u more than two-thirds by weight. A negative relationship between landed weight and price was obtaineB for 19 of 24 fisheries products. Average catch rates were determined for 14 gear pes The most efficient active gear were handlines, liftnets and castnets (average 1629–4296 g. gear-1. houi-1). The best passive gear types were vertical slittraps and gillnets (average 1042–1160 g gear-1 day-1). Gear ownership type changed significantly between 1980 and 1987.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 9 (1993), S. 0 
    ISSN: 1439-0426
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In 1987 there were 18,800 households on the Mahakam floodplain. Of these, 5,800 were full-time and 6,200 arttime fishermen, with the remainder full-time farmers. Daily and seasonal catch levels were variabfe aid related to water level changes. Catches raned between 1.84 and 5.7t person-1 year-1 for full-time and between 0.97 and 1.6 t person-1 year-1 for part-time fishermen. Earnings per person from fishing averaged respectively R. 1,400,000 and Rp. 400,000 in 1987, comprising 75–95% and 33–85 % of their total income. Overall labour input per person was 287 days year-1 and 5.04 hours day-1 for full-time and 250–265 days year-1 and 5.12 hours day-1 for part-time fishermen. The proportions that came from fishery-related activities were resectively 25–60 % and 10–25 %. Labour requirements to clean, salt and dry one kilogram of fish ranged between 13 and 58 minutes.
    Type of Medium: Electronic Resource
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