Incidencia de la talla en el desarrollo gonadal del recurso Ophichthus remiger (VALENCIENNES, 1842)
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2015
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
La vulnerabilidad del recurso Ophichthus remiger, al no contar con una base biológica sólida para el manejo de la pesquería del recurso, fue el problema planteado para el presente estudio. Siendo la finalidad la evaluación de la relación que se estable entre la talla y el desarrollo gonadal, para lo cual se realizó un muestreo mensual, entre las latitudes (Latitud 1° 00´ 23.17” S; Longitud 80° 41´ 24.39” W) de enero a diciembre del 2014, con un N= 904 individuos de O. remiger utilizando tubos-trampas PVC, se obtuvieron datos biométricos de los individuos: sexo, longitud total, peso total, peso eviscerado, grado de madurez sexual y peso de las gónadas. O. remiger presentó una talla media de captura de 63,7 cm LT, 72,12 cm LT machos y 75,3 cm LT hembras. El porcentaje más alto IGS estuvo en el mes de marzo con valores de M= 1,47%; H= 1,52%. En la descripción macroscópica de las gónadas se obtuvieron cinco estadios de madurez, la mayor representación de los estadios se la obtuvo en los meses de febrero a marzo con diferentes porcentajes en estadios. Se elaboró la descripción macroscópica de los estadios gonadales para machos y hembras de anguila común O. remiger. La proporción de sexo tuvo una relación de 1,0H: 0,74 M, Para la talla media de madurez en machos mostró un valor de 72,12, mientras que en hembras fue de 75,3 cm LT. Se determinó mediante la ecuación de Ricker la alométria, general W = 0,0021L2,8886 r= 0,9464, en tanto que para hembras se obtuvo W=0,0005L3,2118 r=0,9719 y para machos W=0,0069L2,5992 r= 0,9210. Con relación a la talla media de captura y talla media de madurez se evidencia captura de individuos que no han alcanzado talla de madurez sexual 63,7cm.LT. En lo que respecta a crecimiento la presento un crecimiento alométrico negativo razón por la cual esta tiene a ganar más talla que peso, excepto las que presenta las hembras en periodos de maduración gonadal donde la alométria es positiva. Por el índice gonadosomático la mayor fertilidad está en los eses de febrero a marzo considerando un sincronismo para el mes de marzo.
Ophichthus remiger resource vulnerability, by not having a solid base of biological to the management of fishery resources was the problem posed for this study. As the purpose of evaluating the relationship that is established between the size and gonadal development, for which a monthly sampling, between latitudes (Latitude 1 00 '23.17 "S, Longitude 80 ° 41' 24.39" W) was performed January to December 2014 with N = 904 species O. remiger, using PVC pipe-traps, for obtaining biometric data of species: sex, total length, total weight, gutted weight, sexual maturity and gonad weight. O. Remiger had an average catch size of 63.7 cm.LT, 72.12 cm.LT and 75.3 cm LT males females. IGS The highest percentage was in March with values of M = 1.47%; H = 1.52%. In the macroscopic description of gonads five stages of maturity were obtained, the greater representation of the stages are obtained in the months of February and March with different percentages of stadiums. The macroscopic description of gonadal stages for males and females O. Remiger common eel was developed. The sex ratio had a relationship 1.0H: 0.74 M. For the average size at maturity for males he showed a value of 72.12 cm.LT, while in females was 75.3 cm.LT. Was determined by the allometric equation Ricker, generally W = 0,0021L2,8886 r= 0,9464 while for females W=0,0005L3,2118 r=0,9719 was obtained and for males W=0,0069L2,5992 r= 0,9210. Relative to the average catch size and length at maturity capture individuals who have not reached maturity length 63,7cm.LT. With regard to growth I introduce a negative allometric growth why this has to gain more weight size except that females having gonadal maturation periods where allometric is positive. For the gonadosomatic index is the highest fertility in the months of February and March considering a timing for the month of March.
Ophichthus remiger resource vulnerability, by not having a solid base of biological to the management of fishery resources was the problem posed for this study. As the purpose of evaluating the relationship that is established between the size and gonadal development, for which a monthly sampling, between latitudes (Latitude 1 00 '23.17 "S, Longitude 80 ° 41' 24.39" W) was performed January to December 2014 with N = 904 species O. remiger, using PVC pipe-traps, for obtaining biometric data of species: sex, total length, total weight, gutted weight, sexual maturity and gonad weight. O. Remiger had an average catch size of 63.7 cm.LT, 72.12 cm.LT and 75.3 cm LT males females. IGS The highest percentage was in March with values of M = 1.47%; H = 1.52%. In the macroscopic description of gonads five stages of maturity were obtained, the greater representation of the stages are obtained in the months of February and March with different percentages of stadiums. The macroscopic description of gonadal stages for males and females O. Remiger common eel was developed. The sex ratio had a relationship 1.0H: 0.74 M. For the average size at maturity for males he showed a value of 72.12 cm.LT, while in females was 75.3 cm.LT. Was determined by the allometric equation Ricker, generally W = 0,0021L2,8886 r= 0,9464 while for females W=0,0005L3,2118 r=0,9719 was obtained and for males W=0,0069L2,5992 r= 0,9210. Relative to the average catch size and length at maturity capture individuals who have not reached maturity length 63,7cm.LT. With regard to growth I introduce a negative allometric growth why this has to gain more weight size except that females having gonadal maturation periods where allometric is positive. For the gonadosomatic index is the highest fertility in the months of February and March considering a timing for the month of March.
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OPHICHTHUS REMIGER, TALLA MEDIA MADUREZ, INDICE GONADOSOMATICO, ESTADOS DE MADUREZ, EPOCA DE REPRODUCCION