Affiliation:
1. Universidade Federal de Alagoas, Brazil
2. Universidade Estadual Paulista, Brazil
Abstract
Fishing resources are important generators of income and food for the rural and urban people in the Amazon. The present paper investigates fishing and environmental variables determining fishing production landed in Manaus and evaluates the relative abundance of commercial fishes in the different sub-systems of the Central Amazon basin. Information collected was used to test the new catch index derived from multiple regressions with the following significant variables: number of fisherman days fishing; distance of the fishing ground from Manaus; amount of ice carried during the trip; and river level. There were no significant differences between mean catch values of the Purus, Madeira and Juruá sub-systems. These results suggest that the tributaries of the right margin were very similar and were the most productive in commercial terms. The actual production varies according to the recent magnitude of fishing effort, environmental variations and operational aspects of fishing, particularly ice consumption.
Subject
General Agricultural and Biological Sciences
Reference25 articles.
1. Limnology in Brazil;ARAUJO-LIMA CARM,1995
2. Distribuição, dinâmica da pesca e dos recursos pesqueiros na Amazônia Central;BATISTA VS.,1998
3. On the relationship between catch per unit effort and whale abundance;COOKE JG.,1985
4. Use of a multiplicative model to estimate catch rate and effort from commercial data;GAVARIS S.;Can. J. Fish. Aquat. Sci.,1980
5. Determinants of catching power in the British Columbia salmon purse-seine fleet;HILBORN R.;Can. J. Fish. Aquat. Sci.,1985
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