Abstract
ABSTRACT Length and weight data are useful in fisheries management and standard results of fish monitoring programs. Length-weight relationship (LWR) is used for estimating the weight corresponding to a given length, and the condition factor is used to compare the body condition, fatness or health of fish populations. This study aimed to estimate the LWR and the condition factor for 12 freshwater fish species from the Igarapé Fortaleza basin, a tributary of the Amazonas River system in the State of Amapá, eastern Amazon (Brazil). The coefficient of determination, the allometric condition factor and the allometric coefficient varied among species, and were compared with populations elsewhere. In 83.3% of the species, the allometric coefficient remained within the expected range. This was the first record of LWR parameters for Acestrorhynchus falcirostris.
Highlights
Length and weight data are useful in fisheries management and standard results of fish monitoring programs
The length-weight relationship (LWR) is a mathematic model that allows for the conversion of length into weight, and weight into length in stock assessment models, as well as the estimation of biomass from the length frequency distribution
Length-weight relationship (LWR) is used for estimating the condition factor of fish, which is used to compare the health of fish populations
Summary
Length and weight data are useful in fisheries management and standard results of fish monitoring programs. Relação peso-comprimento e fator de condição para doze espécies de peixes da bacia do Igarapé Fortaleza, um pequeno tributário do estuário do Rio Amazonas
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