LENGTH-WEIGHT RELATIONSHIPS OF 26 FISH SPECIES FROM ARTISANAL FISHERY IN ECUADOR

Authors

  • Dialhy Coello Departamento de Ciencias del Mar, Carrera de Biología, Facultad de Ciencias Naturales, Universidad de Guayaquil, C.P. 090601, Guayaquil, Ecuador. - Programa de Especies Vulnerables, Proceso de Investigación de Recursos Bioacuáticos https://orcid.org/0000-0001-9086-0968
  • René Zambrano Departamento de Ciencias del Mar, Carrera de Biología, Facultad de Ciencias Naturales, Universidad de Guayaquil, C.P. 090601, Guayaquil, Ecuador. https://orcid.org/0000-0002-0603-7475
  • Marco Herrera Programa de Especies Vulnerables, Proceso de Investigación de Recursos Bioacuáticos y su Ambiente, Instituto Público de Investigación de Acuicultura y Pesca, CP. 090308, Guayaquil, Ecuador https://orcid.org/0000-0001-6653-2374

DOI:

https://doi.org/10.24039/rtb20222011267

Keywords:

fishing gears, Ecuadorian mainland, fishery resources, power model

Abstract

The length-weight relationship is usable for estimating biomass of organisms, determining the “wellbeing” of the individual and as input data in stock assessment models. The objective of this work was to establish the length-weight relationship of 26 species of fish present in artisanal fishery along the Ecuadorian continental coast. Total length and weight were recorded monthly, between 2012 and 2014, at sampling sites located in the coastal provinces of Ecuador. The length-weight relationship was estimated using the power model. A total of 24 commercials and two non-commercial species were analyzed, including demersal and benthic organisms. The value of the intercept was less than 0.03, while the coefficient of determination was greater than 0.98. The slope values showed three species with negative allometry (b < 3), nine species with positive allometry (b > 3) and 14 species with isometry (b = 3). Allometry is a specific characteristic of the species and intraspecific variations can be related to genetically determined effects, as well as, by sex, stage of maturity, spawning period. The parameters of the length-weight relationship presented should be taken with caution considering that they are given regardless of sex.

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Published

2021-12-06

How to Cite

Coello, D. ., Zambrano, R. ., & Herrera, M. . (2021). LENGTH-WEIGHT RELATIONSHIPS OF 26 FISH SPECIES FROM ARTISANAL FISHERY IN ECUADOR. The Biologist, 20(1), 25–32. https://doi.org/10.24039/rtb20222011267

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Original Articles