Aspectos morfométricos de dos especies de la familia Ariidae en el estuario interior del Golfo de Guayaquil
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2019
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
Este trabajo busca caracterizar las medidas morfométricas de dos especies de bagre de
la familia Ariidae en el estuario interior del Golfo de Guayaquil. Las muestras fueron
obtenidas de la captura comercial realizada en el estuario interior del Golfo de
Guayaquil. Se tomaron 18 medidas morfométricas de cada individuo, para cada especie
mediante un ictiómetro y del calibrador Vernier. Las variables morfométricas se
relacionaron mediante regresiones lineales y a través del coeficiente de correlación. Se
analizaron un total de 226 organismos, de los cuales el 52,21% correspondió a Notarius
troschelii y el 47,79% a Ariopsis guatemalensis. Las regresiones lineales mostraron una
alometría negativa de las variables morfométricas debido a que, el valor de la pendiente
(b) fue < 1. Los coeficientes de correlación fueron mayores a 0.51 para ambas especies.
de forma similar, la relación talla-peso mostró valores altos de correlación y alometría
negativa (b < 3). Los resultados obtenidos podrían reflejar las diferentes condiciones
fisiológicas en las especies, así como, estar relacionados con las condiciones bióticas que
fluctúan en el estuario interior del Golfo de Guayaquil.
This project seeks to characterize the morphometric measurements of two catfish species of the Ariidae family in the inner estuary of Guayaquil’s gulf. The samples were obtained from the commercial capture that took place in the inner estuary of Guayaquil’s gulf. During this sampling process eighteen morphometric measures were obtaining of each individual though the use of an ichthyometer and a Vernier Caliper. The decision variables of morphometric measures were related through a liner regression model and the correlation coefficient. Approximately, 226 organisms were analyzed and 52.1% of those belong to Notarius troschelii and 47.79 % were Ariopsis guatemalensis. The Linear Regression analysis showed that the allometry regarding this model is negative with a slope (b) < 1 while the correlation coefficient for both species were greater than 0.51. Similarly, the height-to-weight ratio showed high correlation coefficient and a negative allometry with a slope < 3. The results of this project may be a guide to show the different physiological conditions of the species as well as the relation between the fluctuations of the biotic condition regarding the environment in Guayaquil’s Gulf.
This project seeks to characterize the morphometric measurements of two catfish species of the Ariidae family in the inner estuary of Guayaquil’s gulf. The samples were obtained from the commercial capture that took place in the inner estuary of Guayaquil’s gulf. During this sampling process eighteen morphometric measures were obtaining of each individual though the use of an ichthyometer and a Vernier Caliper. The decision variables of morphometric measures were related through a liner regression model and the correlation coefficient. Approximately, 226 organisms were analyzed and 52.1% of those belong to Notarius troschelii and 47.79 % were Ariopsis guatemalensis. The Linear Regression analysis showed that the allometry regarding this model is negative with a slope (b) < 1 while the correlation coefficient for both species were greater than 0.51. Similarly, the height-to-weight ratio showed high correlation coefficient and a negative allometry with a slope < 3. The results of this project may be a guide to show the different physiological conditions of the species as well as the relation between the fluctuations of the biotic condition regarding the environment in Guayaquil’s Gulf.
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ALOMETRÍA, MORFOMETRÍA, BAGRE, GOLFO DE GUAYAQUIL.