Experimental culture of snook Centropomus undecimalis and chucumite Centropomus parallelus (Perciformes: Centropomidae) in artisanal earthen ponds
To study the growth of the common snook Centropomus undecimalis, and chucumite Centropomus parallelus in freshwater rural ponds, fingerlings of about 5.5 cm standard length of both species were captured in Alvarado Lagoon, (Veracruz) and stocked in three 25 x 10 x 1.20 m ponds at densities of 4:1, 1...
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Veröffentlicht in: | Ciencias marinas 2006-06, Vol.32 (2), p.219-227 |
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Format: | Artikel |
Sprache: | eng ; spa |
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Zusammenfassung: | To study the growth of the common snook Centropomus undecimalis, and chucumite Centropomus parallelus in freshwater rural ponds, fingerlings of about 5.5 cm standard length of both species were captured in Alvarado Lagoon, (Veracruz) and stocked in three 25 x 10 x 1.20 m ponds at densities of 4:1, 1:1 and 3:2 ( C. parallelus). Tilapia (Oreochromis niloticus) broodstocks were stocked at the same time to supply live food for the snook and chucumite. During the 14-month experimental period, the absolute growth rates in length and weight were recorded, obtaining maximum values of 26.43 plus or minus 0.135 cm and 265.3 plus or minus 0.623 g for C. undecimalis and of 12.0 plus or minus 0.105 cm and 55.1 plus or minus 0.191 g for .C. parallelus; the daily growth rate was 0.062 cm for the former and 0.028 cm for the latter. The length-weight relationship estimated (W = aL super(b)) was 3.01 for C. undecimalis and 2.96 for C. Parallelus, presenting isometric growth. The fresh-water culture conditions were monitored the temperature (26-34 degree C), dissolved oxygen (4.1 - .9 mg L super(-1)) and pH (6.9 - 7.5). The culture conditions used, did not have any negative effect on growth, since the lengths and weights attained are within the mean values reported for both species. |
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ISSN: | 0185-3880 2395-9053 |
DOI: | 10.7773/cm.v32i21.1066 |