EvaluaciĆ³n del efecto de tres densidades de presa sobre la supervivencia larval de Jaiba Mora Homalaspis plana (Milne-Edwards, 1834)
Cargando...
Archivos
Fecha
2003
Profesor/a GuĆa
Facultad/escuela
Idioma
es
TĆtulo de la revista
ISSN de la revista
TĆtulo del volumen
Editor
Universidad AndrƩs Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Homalaspis plana es un recurso sometido a una fuerte explotaciĆ³n
pesquera, por lo que es conveniente y oportuno desarrollar tƩcnicas de cultivo
larval que permitan disponer de juveniles para evaluar la factibilidad de
actividades de repoblamiento y/o cultivo.
Esta investigaciĆ³n se llevĆ³ a cabo entre agosto y octubre de 2002 en el
Centro de Investigaciones Marinas de Quintay de la Universidad Nacional
AndrĆ©s Bello donde se evaluĆ³ el efecto de la densidad de presa (10, 20 y 30
rot/ml) sobre la supervivencia larval (cada tratamiento en cuadriplicado) y se
caracterizĆ³ los estadios de desarrollo larval con una metodologĆa diferente.
El cultivo larval se iniciĆ³ con 80 larvas/1, con 16 Ā±1Ā° C de temperaturĀ”Ā”t,
35 psu de salinidad, 7.8 de pH, una suave y constante aireaciĆ³n y un
fotoperĆodo de 12/12. Regularmente se registrĆ³ la densidad larval y
parƔmetros ambientales. Para los tres tratamientos se obtuvo un 0% de
supervivencia al cabo de 30 dĆas de cultivo, lo que no permitiĆ³ determinar una
densidad de presa Ć³ptima.
Para la segunda metodologĆa se utilizo un estanque de 200 L de
capacidad a una temperatura de 18Ā±2Ā° C y 35 psu de salinidad sometido a un
fotoperĆodo de luz nC~tural. El cultivo Sfa iniciĆ³ con una densidad de 100
larvas/L, la alimentaciĆ³n se suministrĆ³ diariamente iniciĆ”ndose esta con
rotĆferos Brachionus plicatilis (10 rot/ml) para luego reemplazarlos por nauplĆos
de Artemia (6/ml) en estadios larvales mĆ”s avanzados (Zoea Ā· 111). Se
caracterizĆ³ los cuatro estadios Zoea, megalopa y juvenil al cabo de 47 dĆas de
cultivo.
Homalaspis plana is a resource under an intensive level explotation, it's advisable to develop larval culture techniques that allow to have juveniles in order to assess the feasibility of repopulation and/or culture. This research was done between August - October 2002 Centro de Investigaciones Marinas de Quintay of Universidad Nacional AndrĆ©s Bello, density effect on the larval survival was assessed by testĆng three different prey densities (10, 20 and 30 rotĆfers/ml) each treatment in quadruplicated, and Ćts development was characterized using an a different methodologie. The larval culture was started with 80 larves/1, with a termperature of 16 Ā±1 o C, 35 psu of salinity, a pH of 7.8, a soft and constant airing and a photoperiod of 12/12. the larval density and environmental factors were recorded regularly. In the three treatments, there was a 0% of survival after 30 days of culture as result, which didn't allow to determine a optimum prey density. Forthe second methodology, a pond with a capacity of 200 L was used, with a temperature of 18Ā±2Ā° C and saljnity of 35 psu, under a natural lighting photoperiod. The culture was started with a density of 100 larvae/L, and the feeding was provided daily. This feeding consisted on Brachionus plĆcatilĆs (1 O rotlml)hat were after replaced with nauplis de Artemia (6/ml) in more advanced larval states (Zoea 111). The four Zoea states, megalopa and juvenile were characterized after 47 days of culture.
Homalaspis plana is a resource under an intensive level explotation, it's advisable to develop larval culture techniques that allow to have juveniles in order to assess the feasibility of repopulation and/or culture. This research was done between August - October 2002 Centro de Investigaciones Marinas de Quintay of Universidad Nacional AndrĆ©s Bello, density effect on the larval survival was assessed by testĆng three different prey densities (10, 20 and 30 rotĆfers/ml) each treatment in quadruplicated, and Ćts development was characterized using an a different methodologie. The larval culture was started with 80 larves/1, with a termperature of 16 Ā±1 o C, 35 psu of salinity, a pH of 7.8, a soft and constant airing and a photoperiod of 12/12. the larval density and environmental factors were recorded regularly. In the three treatments, there was a 0% of survival after 30 days of culture as result, which didn't allow to determine a optimum prey density. Forthe second methodology, a pond with a capacity of 200 L was used, with a temperature of 18Ā±2Ā° C and saljnity of 35 psu, under a natural lighting photoperiod. The culture was started with a density of 100 larvae/L, and the feeding was provided daily. This feeding consisted on Brachionus plĆcatilĆs (1 O rotlml)hat were after replaced with nauplis de Artemia (6/ml) in more advanced larval states (Zoea 111). The four Zoea states, megalopa and juvenile were characterized after 47 days of culture.
Notas
Tesis (Ingeniero en Acuicultura)
Palabras clave
Homalapsis plana, Cultivos, Supervivencia larval