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Trends in fishing indices for the thread herring fishery in northwest Mexico
Author(s) -
RUIZLUNA A.,
JACOBCERVANTES M.,
ESPARZAHARO A.
Publication year - 1997
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1046/j.1365-2400.1997.00110.x
Subject(s) - fishing , fishery , catch per unit effort , herring , fisheries management , environmental science , fish <actinopterygii> , biology
The initial success of the thread herring fishery in Sinaloa was followed by an increase in the mean fleet capacity, from 50 t in 1972 to 185 t in 1993. However, the efficiency (a measure of the storage utilization by a vessel), the fishing power and catch‐per‐unit‐effort (CPUE), did not increase proportionally. Efficiency showed a declining trend with the vessel’s size, and the CPUE stabilized at around 50 t vessel –1 . To standardize the CPUE, a General Linear Model (GLM) incorporating fishing seasons and vessel categories was used. This model showed that the fishing power increased with time, but the differences among vessel categories were lower, ranging from 1–1.14. This model also explained 75.3% of the variation in catch rate. Analysis of the fishing indices trends suggested a reduction of the mean vessel size as the best way to improve the fishery management.