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Título del libro: Effects And Expectations Of Tilapia As A Resource
Título del capítulo: Evaluation of the growth of tilapia in ponds at México City

Autores UNAM:
JOSE LUIS GOMEZ MARQUEZ; BERTHA PEÑA MENDOZA; JOSE LUIS GUZMAN SANTIAGO;

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Autores externos:

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Idioma:
Inglés

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Año de publicación:
2014

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Resumen:

In countries that have been introduced the tilapias, they represent aconsiderable economic resource for its production in the differentreservoirs and ponds. In Mexico, a production of 73,373 ton was obtainedin 2009, ranking third place in aquaculture at the national level. In thischapter the growth of Oreochromis niloticus males sexually reversed wasanalyzed in concrete ponds in the FES Zaragoza, UNAM, under theenvironmental conditions of the Mexico City. The experiment was carriedout from April to September 2010, in a concrete pond of 50 m2, withthree divisions. During this period, EL Pedregal balanced food wassupplied daily at the rate of 6% of their biomass and total length and bodyweight was recorded monthly to get the type of growth. The followingindicators were calculated: final body weight (FBW), final total length(FTL), percentage gain in weight and length (PGW or PGL), specificgrowth rate (SGR), feed conversion rate (FCR), Fulton's condition index(K) and survival. Water quality was monitored along the experiment.Based on the results, there were not statistically significant differences insize (F=0.59, p>0.05) and weight (F=0.75, p> 0.05) between the divisionsof the pond. The initial mean total length used was 4 cm and ended with21.3 cm. The initial average body weight of the fish was 1 g and theyrecorded 140 g the end of culture. The weight-length relationship for thefish was positive allometric (b=3.099, p<0.05). The percentage gain inbody weight and total length averaged were 150% and 31.8%respectively. Specific growth rate in weight was of 3.0. Daily weight gainwas of 0.52 g/day and 0.11 cm/day. The FCR had a mean value of 1.8:1and condition factor (K) had an average of 1.45. Water quality indicategood oxygenation (> 5 mg/L), warm water (> 23°C), productive (<100mg/L CaCO3) and slightly basic (pH>8). Acceptable growth of fish and ayield of 3 ton/ha/6 months were obtained; therefore, the culture of tilapiaunder conditions of Mexico City is recommended. © 2015 by Nova Science Publishers, Inc. All rights reserved.

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Entidades citadas de la UNAM:

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Fuente:


ISBN:
9781634633406
Editorial:
Nova Science Publishers, Inc. Nombre de la publicación:
Evaluation of the growth of tilapia in ponds at México City
Página inicial:
155
Página final:
168

Tipo de producto:
Capítulo de un Libro