Resumen
The present paper deals with the results obtained on the basis of studies on the feeding and growth of juveniles of the croaker, Micropogon opercularis in experimental conditions. The following, more important results, were obtained: 1. - The values of the daily food requirement for the juveniles of 79-126 mm in total length and of 4.1-22 g in weight, at the beginning of the experiments, oscillated between 1,29 and 6,88%, with the average of 3,58 %. 2. -The efficiency of conversion of food is rather high and was calculated; for "normal" specimens as 19,45 % in average. 3. -Very big individual differences were observed in the growth of the juveniles. In the case of the total lengths, the rate of annual growth oscillated between 15,2 and 114,2% and. in the case of the weights, between 23,5 and 1114.5%. 4. -It was observed that in the scales of the juveniles under experiments the first annulus is not formed or is formed not always in a regular way.
ARTIGOS
Alimentacion y crecimiento de juveniles de corvina, Micropogon opercularis, en condiciones experimentales* * Contribución del Instituto Nacional de Investigación y Desarrollo Pesquero Nº 359.
Juana D. de Ciechomski
Instituto Nacional de Investigación y Desarrollo Pesquero, Mar del Plata, Argentina
SYNOPSIS
The present paper deals with the results obtained on the basis of studies on the feeding and growth of juveniles of the croaker, Micropogon opercularis in experimental conditions. The following, more important results, were obtained: 1. - The values of the daily food requirement for the juveniles of 79-126 mm in total length and of 4.1-22 g in weight, at the beginning of the experiments, oscillated between 1,29 and 6,88%, with the average of 3,58 %. 2. -The efficiency of conversion of food is rather high and was calculated; for "normal" specimens as 19,45 % in average. 3. -Very big individual differences were observed in the growth of the juveniles. In the case of the total lengths, the rate of annual growth oscillated between 15,2 and 114,2% and. in the case of the weights, between 23,5 and 1114.5%. 4. -It was observed that in the scales of the juveniles under experiments the first annulus is not formed or is formed not always in a regular way.
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- CIECHOMSKI, J. de & EHRLICH, M. D. 1977. Alimentación de los juveniles de pescadilla, Cynoscion striatus (Cuvier, 1829) Jordan & Evermann, 1889 en el mar y en condiciones experimentales. Pisces. Sciaenidae. Physis, B. Aires, 57(93):1-12.
- ERNARDT, N. M. & ARENA, G. 1977. Dinámica de población de corvina blanca (Micropogon opercularis) en el Río de La Plata y su frente oceánico. Infme téc., Inst nac. Pesca, Uruguay, (8):1-45.
- HAIMOVICI, M. 1974. Resultados preliminares sobre la biología y crecimiento de la corvina rubia (Micropogon opercularis) del área de Mar del Plata. CARPAS/6/74/Tec, (9):1-12 (mimeo.
- JOSEPH, D. C. 1962. Growth characteristics of two southern California surffishes, the California corbina and spotfin croaker, family Sciaenidae. Fish Bull. Calif., (119):1-54.
- ROUX, C. 1973. Poissons téléostéens du plateau continental brésilien. Resultats scientifiques des campagnes de la "Calypso", 10. Annls Inst océanogr., Monaco, n. s., 49 (fasc. supplem.):23-207.
- VAZZOLER, A. E. A. de M. 1971. Diversificação fisiológica e morfológica de Micropogon furnieri (Desmarest, 1822) ao sul de Cabo Frio, Brasil. Bolm Inst, oceanogr., S Paulo, 20(2):1-70.
- VAZZOLER, G. 1962. Sôbre a biologia da corvina da costa sul do Brasil. Bolm Inst. oceanogr. S. Paulo, 12(1):53-102.
Fechas de Publicación
-
Publicación en esta colección
06 Jun 2012 -
Fecha del número
1980
