Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba

Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba

Induced spawning and larval rearing experiments were carried out with the mullet Mugil liza Valenciennes at the end of the 1987/1988 natural spawning season at Tunas de Zaza, in which the juvenile stage of a  mugilid species was reached for the first time in Cuba. All examined females had atretic oo...

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Autores principales: Alvarez-Lajonchere, L, Hernández-Molejón, OG, Pérez-Sánchez, L
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2021
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/801
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spelling oai:cienciasmarinas.com.mx:article-8012013-08-19T03:29:29Z Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba Producción de juveniles de la lisa Mugil liza Valenciennes, 1836, por reproducción controlada en Cuba Alvarez-Lajonchere, L Hernández-Molejón, OG Pérez-Sánchez, L Induced spawning and larval rearing experiments were carried out with the mullet Mugil liza Valenciennes at the end of the 1987/1988 natural spawning season at Tunas de Zaza, in which the juvenile stage of a  mugilid species was reached for the first time in Cuba. All examined females had atretic oocytes. From the selected 18, four (22.2%) died during the hormone treatment and from the 14 that finished it, natural spawning or artificial fertilization was obtained from seven of them (50%). Best spawning results were obtained with 60-90 mg/kg of mullet pituitary in 3-4 partial doses (24 h interval). The eggs of one female with the highest fertilization rate (60%) were incubated at 24ºC, obtaining 90% survival of the fertilized eggs at hatching. The rearing experiments demonstrated that larvae were ready for exogenous feeding at day 3-4 and that the postlarval stage ended 40 days after hatching; also, that tarpaulin tanks were not adequate, that a strong aeration at the centre is beneficial and that the use of an intermediate food organism between rotifers and Artemia should improve the results. At the end of the rearing cycle (49 days), 220 juveniles were harvested in one of the four treatments used (0.20% survival). The difficulties faced and possible technique improvements for increasing survival are discussed. Se realizaron experimentos de inducción del desove y cría de larvas con la lisa Mugil liza Valenciennes en Tunas de Zaza, al final de la temporada natural de desove de 1987/1988, en los que se alcanzó por primera vez la etapa juvenil en una especie de mugílido en Cuba. Todas las hembras examinadas presentaron ovocitos atrésicos. De las 18 seleccionadas, cuatro (22.2%) murieron durante el tratamiento hormonal y de las 14 que lo terminaron, se logró la fertilización natural o artificial en siete de ellas (50%). Los mejores resultados en el desove se lograron con 60-90 mg/kg de pituitaria de lisa en 3-4 dosis parciales (24 h  de intervalo). Los huevos de una de las hembras con la tasa de fertilización más elevada (60%) se incubaron a  24ºC y  se logró un 90% de eclosión de los fecundados. Los experimentos de cría demostraron que las larvas están aptas para la alimentación exógena a los 3-4 días de la eclosión y que el período postlarval finaliza a  los 40 días; además, que los tanques de tarpaulín no son adecuados, que una fuerte aireación en el centro del tanque es beneficiosa y que el uso de un organismo intermedio entre los rotíferos y la Artemia debe mejorar los resultados. Se cosecharon 220 juveniles al final del período de cría (49 días) en uno de los cuatro tratamientos aplicados, para un 0.20% de sobrevivencia. Se discuten las dificultades confrontadas y las posibles mejoras de la técnica para incrementar la sobrevivencia. Iniversidad Autónoma de Baja California 2021-02-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/801 10.7773/cm.v17i2.801 Ciencias Marinas; Vol. 17 No. 2 (1991); 47-56 Ciencias Marinas; Vol. 17 Núm. 2 (1991); 47-56 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/801/420420536 Copyright (c) 2021 Ciencias Marinas
institution Ciencias Marinas
collection OJS
language eng
format Online
author Alvarez-Lajonchere, L
Hernández-Molejón, OG
Pérez-Sánchez, L
spellingShingle Alvarez-Lajonchere, L
Hernández-Molejón, OG
Pérez-Sánchez, L
Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba
author_facet Alvarez-Lajonchere, L
Hernández-Molejón, OG
Pérez-Sánchez, L
author_sort Alvarez-Lajonchere, L
title Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba
title_short Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba
title_full Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba
title_fullStr Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba
title_full_unstemmed Production of Juveniles of the mullet Mugil liza Valenciennes, 1836, by controlled reproduction in Cuba
title_sort production of juveniles of the mullet mugil liza valenciennes, 1836, by controlled reproduction in cuba
description Induced spawning and larval rearing experiments were carried out with the mullet Mugil liza Valenciennes at the end of the 1987/1988 natural spawning season at Tunas de Zaza, in which the juvenile stage of a  mugilid species was reached for the first time in Cuba. All examined females had atretic oocytes. From the selected 18, four (22.2%) died during the hormone treatment and from the 14 that finished it, natural spawning or artificial fertilization was obtained from seven of them (50%). Best spawning results were obtained with 60-90 mg/kg of mullet pituitary in 3-4 partial doses (24 h interval). The eggs of one female with the highest fertilization rate (60%) were incubated at 24ºC, obtaining 90% survival of the fertilized eggs at hatching. The rearing experiments demonstrated that larvae were ready for exogenous feeding at day 3-4 and that the postlarval stage ended 40 days after hatching; also, that tarpaulin tanks were not adequate, that a strong aeration at the centre is beneficial and that the use of an intermediate food organism between rotifers and Artemia should improve the results. At the end of the rearing cycle (49 days), 220 juveniles were harvested in one of the four treatments used (0.20% survival). The difficulties faced and possible technique improvements for increasing survival are discussed.
publisher Iniversidad Autónoma de Baja California
publishDate 2021
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/801
_version_ 1715724013274136576

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