Cultivo experimental del cladocero Moina sp alimentado con Ankistrodesmus sp y Saccharomyces cereviseae

Abstract

Objetivo. Realizar un cultivo experimental de cladócero Moina sp alimentado con Ankistrodesmus sp y Saccharomyces cereviseae. Materiales y métodos. Fueron realizados cultivos experimentales de la cepa de cladóceros Moina sp en el laboratorio de Alimento Vivo de la Universidad de Córdoba, bajo condiciones controladas de temperatura (22oC), pH (7.6), intensidad lumínica (2000 lux) y aireación. Se emplearon dos dietas de alimento como tratamiento (Ankistrodesmus y Ankistrodesmus mas Saccharomyces cereviseae) en concentración de 40 x 105 cel.ml-1 cada uno, para determinar su efecto sobre el desempeño de la población. Diariamente se registró la densidad poblacional y celular. Resultados. Se obtuvieron diferencias significativas para el efecto de las dietas sobre el crecimiento poblacional de los cladóceros, los individuos alimentados con Ankistrodesmus sp + Saccharomyces cereviseae alcanzaron una densidad de 12.3a ±0.30 org/ml- 1 presentando mayor tasa instantánea de crecimiento (K) 0.36 ± 0.002, el menor tiempo de duplicación (td) 1.94 ± 0.012 y el mayor rendimiento (r) 1,1 ± 0.07 clad.ml-1.día-1. Conclusión. Los cladóceros por sus características de crecimiento en cultivo, presentan adaptación favorable a las condiciones de manejo para la producción de biomasas potencialmente útiles como partícula nutritiva con fines acuícolas.

Feeding activity and influence of intraspecific competition on zooplankton communities by jundiá (Rhamdia quelen Quoy and Gaimard, 1824) in laboratory

“…Considering the feeding of the larvae of South American fish, it has been reported that there is a preference for the consumption of larger-sized zooplankton (Cladocera and copepods) and reduced consumption of Rotifera and Protozoa in the majority of the species studied (Prieto et al, 2006), which corroborates the behaviour displayed by the juvenile forms of Rhamdia quelen durring in the course of the present study, where a greater consumption Feeding activity and competition among jundia larvae of Cladocera was observed. Priority for the consumption of larger zooplanktonic organisms in the beginning of exogenous feeding can be explained by the advantages of greater efficiency in the energy balance of larger prey (Werner and Hall, 1974;Warburton 2003).…”

“…Authors such as Piedras and Pouey (2005) and Prieto et al (2006) have demonstrated that groups of organisms such as Cladocera are preferred by the fish in comparison to copepods. This preference has been explained by body shape as well as mechanism of locomotion, which is more efficient among the copepods, facilitating their escape (Zaret, 1980).…”

Use of microalgal-enrichedDiaphanosoma celebensisStingelin, 1900 for rearingLitopenaeus vannamei(Boone, 1931) postlarvae

“…Prieto et al . () reported that zooplankton population's growth rate is affected by the nutritional value of feed, which influences the fingerlings' development period, reproduction rate and reproduction frequency. On the contrary, Raymont () reported that C .…”

Reproductive Biology and Life Cycle of Leydigia Louisi Mexicana (Anomopoda, Chydoridae), a Rare Species from Freshwater Littoral Environments

“…Aside from the bacterial growth, the cell wall of yeast (S. cerevisiae) contains 6 to 8% of proteins and a large amount of vitamin B (thiamine, riboflavin, folic acid) making it adequate for the feeding of zooplankton organisms (Prieto et al, 2006). The lipids and liposoluble vitamins provided by yeasts enrich the feed of organisms, fostering their growth and reproduction (Coutteau et al, 1992).…”