| Registro completo |
| Provedor de dados: |
OceanDocs
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| País: |
Belgium
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| Título: |
The differential effects of changing management regimes on yields from two fisheries exploiting the same resources
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| Autores: |
Djama, Theodore
Pitcher, T.J.
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| Data: |
2013-09-26
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| Ano: |
1997
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| Palavras-chave: |
Yield/recruit
Commercial fisheries
Artisanal fishing
Biology
Fisheries
Biological interaction
Sciaenidae
Fisheries development
Fishery management
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| Resumo: |
A yield per recruit model has been used to compare the effects of mesh size increment on the yields and revenues of the fisheries of Cameroon under two different cases. Case 1 assumes the commercial fishery to move from the exploitation of three age-groups to two age-groups with no interactions with the artisanal fishery, whereas Case 2 takes into account these interactions. The difference in the percentage increase of yield per recruit between case 1 and case 2 is 61% at current fishing (46% and 18% yield per recruit increment in cases 1 and 2 respectively). The usually accepted long-term yield per recruit increment with increase of age at first capture (with a single non-interacting fisheries) is, in this case, cancelled out. However, the revenues increase by 72% and 63% in cases 1 and 2 respectively. Therefore the economic approach, compared with purely biological analyses, is more convincing. In general, as fisheries always interact, a single-fishery management approach should not be the rule as it is at present; management strategies should consider interactions between different fisheries and be based on their economic performances and not, as said earlier, on purely biological considerations. This is because a biological approach to fisheries management will, at best, be modified by economic factors, or, at worst, be ignored totally in favour of economic policies.
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| Tipo: |
Journal Contribution
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| Idioma: |
Inglês
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| Identificador: |
Fisheries Research, 29 (1), p. 33-37
0165-7836
http://hdl.handle.net/1834/5132
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| Relação: |
BRODY S, 1927, MO AGR EXP STN B, V97 BRODY S., 1945, BIOENERGETICS GROWTH DJAMA T, 1989, FISH RES, V7, P111, DOI 10.1016/0165-7836(89)90011-8 DJAMA T, 1988, FAO FISH REP, V389, P153 DJAMA T, 1992, THESIS U WALES HOLT S. J., 1957, FISHERY INVEST LON 2, V19, P1 LARKIN PA, 1982, ICLARM C P, V9, P309 LONGHURST ALAN R., 1965, J CONS CONS PERMA INT EXPLOR MER, V29, P302
10.1016/S0165-7836(96)00520-6
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| Direitos: |
Elsevier B.V.
http://www.oceandocs.org/license
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