Aplicación de la morfometría opercular y su relación con la longitud y peso en el monitoreo de la pesca blanca (seco-salada) de especies de importancia comercial en las Islas Galápagos.
Fecha
2007
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Se estudia la morfometría opercular como un medio útil para poder determinar
las tallas de captura en fresco en 10 especies comerciales de las islas
Galápagos. El estudio se lo realiza en la isla San Cristóbal y es un trabajo
pionero que permite evaluar estructuras de talla de los peces explotados en
modelos pesqueros. Los resultados obtenidos determinaron que en lisa rabo
negro y rabo amarillo (familia Mugilidae) la longitud con mayor grado de
asociación es LA con el modelo LT= -0.45+0.0788(LA) con un coeficiente r=
0.7457 para Lisa rabo negro y para Lisa rabo amarillo LT= -1.1641+0.1024(LA)
con un coeficiente r= 0.8443; en bacalao, mero y camotillo (familia Serranidae)
la longitud optima es preopercular LD. En Brujo (familia Scorpaenidae)
la magnitud seleccionada es LC representada por el modelo LT=- 0.6690+0.1846(LC), r=0.9136 ; en palometa (familia Carangidae) la medida
óptima es LB longitud total del preoperculo y presenta el modelo LT=1.2999+0.1198(LB), r=0.9231. En Guajo (familia Scombridae) el mayor
grado de asociación es la medida LA con el modelo LT= -0.5958+0.0751(LA),
r= 0.9160. Se concluye que el opérculo y preopérculo de todas las especies
estudiadas tienen una alta relación con la longitud total o furcal del pez, los
segmentos operculares y preoperculares de las especies estudiadas pueden ser plenamente medidos y diferenciados en estado seco-salado.
Opercular morphometry was studied as a useful means to capture determinlas fresh sizes in 10 commercial species of the Galapagos Islands. The study is done on San Cristobal Island and is a pioneering work that allows assessing size structures of exploited fish fishery models. The results found that in smooth black tail and yellow tail (family Mugilidae) with length greater degree of association is LA with the LT = -0.45 +0.0788 (LA) with a coefficient r = 0.7457 for black tail and Lisa Lisa Yellowtail LT = -1.1641 +0.1024 (LA) with a coefficient r = 0.8443, in cod, halibut and camotillo (family Serranidae) optimal length is preopercular LD. In Brujo (family Scorpaenidae) LC selected quantity is represented by the LT = - 0.6690 +0.1846 (LC), r = 0.9136, in pomfret (family Carangidae) as Optimum total length is LB preopercle and presents the LT = 1.2999 +0.1198 (LB), r = 0.9231. In wahoo (family Scombridae) the highest degree of association is the extent LA with the LT = -0.5958 +0.0751 (LA), r = 0.9160. We conclude that the operculum and preopercle of all species studied have a high relationship with the total length or fork length of the fish, opercular and preopercular segments of the studied species can be fully measured and differentiated when dry-salted.
Opercular morphometry was studied as a useful means to capture determinlas fresh sizes in 10 commercial species of the Galapagos Islands. The study is done on San Cristobal Island and is a pioneering work that allows assessing size structures of exploited fish fishery models. The results found that in smooth black tail and yellow tail (family Mugilidae) with length greater degree of association is LA with the LT = -0.45 +0.0788 (LA) with a coefficient r = 0.7457 for black tail and Lisa Lisa Yellowtail LT = -1.1641 +0.1024 (LA) with a coefficient r = 0.8443, in cod, halibut and camotillo (family Serranidae) optimal length is preopercular LD. In Brujo (family Scorpaenidae) LC selected quantity is represented by the LT = - 0.6690 +0.1846 (LC), r = 0.9136, in pomfret (family Carangidae) as Optimum total length is LB preopercle and presents the LT = 1.2999 +0.1198 (LB), r = 0.9231. In wahoo (family Scombridae) the highest degree of association is the extent LA with the LT = -0.5958 +0.0751 (LA), r = 0.9160. We conclude that the operculum and preopercle of all species studied have a high relationship with the total length or fork length of the fish, opercular and preopercular segments of the studied species can be fully measured and differentiated when dry-salted.
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LONGITUD, MORFOMETRÍA OPERCULAR, PESCA BLANCA, PESO