Experimental culture of Common Snook Centropomus undecimalis (Bloch, 1792) and Fat Snook Centropomus parallelus (Poey, 1860) (Perciformes: Centropomidae) in freshwater in concrete pond in Alvarado, Veracruz, Mexico

Because of the economic importance in Mexico of the Common Snook (Centropomus undecimalis) and the Fat Snook (Centropomus parallelus), a research was carried out to evaluate the growing of these species in freshwater, in a 3:2 ratio and 12.5 fish/7m super(2). A total of 200 fish were used (68 Common...

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Published inVeterinaria Mexico Vol. 37; no. 3; pp. 327 - 333
Main Authors Meza, EAZ, Villalobos, JMB, Pelaez, C V, Torres, P A
Format Journal Article
LanguageSpanish
Published 01.09.2006
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Summary:Because of the economic importance in Mexico of the Common Snook (Centropomus undecimalis) and the Fat Snook (Centropomus parallelus), a research was carried out to evaluate the growing of these species in freshwater, in a 3:2 ratio and 12.5 fish/7m super(2). A total of 200 fish were used (68 Common Snooks and 132 Fat Snooks) which were weighed and measured monthly for a 12-month period. The growing curve was estimated for weight and length with a logarithmic model y = a super(bt), while in the weight - length relationship the W = aL super(b), model was used. The results showed an isometric growth on both species, 3.02 for the Common Snook and 3.13, for the Fat Snook. The absolute length rates were 17.3 plus or minus 0.74 cm and 14.9 plus or minus 2.6 cm, respectively, with a daily growing of 0.047 and 0.041 cm, while the absolute weight rate was 183.6 plus or minus 2.02 g and 118.1 plus or minus 1.38 g, with a daily profit of 0.50 and 0.32 g for the Common Snook and Fat Snook, respectively. The growing size speed was similar on both species, 0.063 for the Common Snook and 0.085 for the Fat Snook; however, the weight increment of the Fat Snook showed greater speed than the one of the Common Snook, 0.273 and 0.179, under an ad libitum feed system in freshwater concrete pond for 365 days.Original Abstract: Por la importancia economica del Robalo (Centropomus undecimalis) y del Chucumite (Centropomus parallelus) en Mexico, se realizo un estudio para evaluar el crecimiento de estas especies en agua dulce, en proporcion de 3:2 con densidad de 12.5 peces en 7 m super(2). Se utilizaron 200 peces (68 robalos y 132 chucumites), que fueron pesados y medidos mensualmente durante 12 meses. Se estimo la curva de crecimiento para peso y longitud a partir de un modelo logaritmico y = a super(bt), mientras que la relacion peso-longitud se utilizo el modelo W = aL super(b). Los resultados mostraron un crecimiento isometrico en ambas especies, 3.02 y 3.13; para el Robalo y el Chucumite el crecimiento absoluto de longitud fue de 17.3 plus or minus 0.74 cm y 14.9 plus or minus 2.6 cm, respectivamente, con crecimiento diario de 0.047 y 0.041 cm, mientras que la tasa absoluta en peso fue de 183.6 plus or minus 2.02 g y 118.1 plus or minus 1.38 g, con ganancias diarias de 0.50 y 0.32 g para el Robalo y Chucumite, respectivamente. La velocidad de crecimiento en talla fue semejante en estas especies: 0.063 y 0.085 para el Robalo y el Chucumite, en forma respectiva; sin embargo, el crecimiento en peso del Chucumite mostro mayor velocidad que el de Robalo 0.273 y 0.179, bajo un sistema de alimentacion ad libitum en condiciones de estanque de concreto en agua dulce en 365 dias.
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ISSN:0301-5092