ABSTRACT The objectives of the present study are to determine the cycle and budget of nitrogen in larviculture ponds of the swimming crab Portunus rrituberculatus and to evaluate their impact on water quality and survival rate. Field surveys were carried out at the Hiroshima Prefecture Fish Farming Center from 1990 to 1993. Among nitrogenous compounds. concentrations of NH -N and particulate or...

For animals that live in a reasonably variable environment the capacity for learning and memory allow them to adapt to the changes they experience. Ecological factors that vary between habitats can affect a range of learning behaviours. Less attention has been directed at how this variation may affect memory processes, or how different ecological variables might interact when shaping cognition ...

In the present study molluscicidal activity of methanol extract of stem bark of plant Euphorbia tirucalli (Family: Euphorbiaceae) against two freshwater harmful snails Lymnaea acuminata and Indoplanorbis exustus were evaluated in the laboratory as well as in the pond. Both snails are intermediate hosts of liver fluke, Fasciola hepatica and Fasciola gigantica, which causes endemic fascioliasis i...

Milkfish is no longer just a superior commodity in Pinrang Regency, but it has become an inflation suppressor South Sulawesi, so that representatives of Bank Indonesia Sulawesi have made the milkfish development cluster Regency. This study aims to analyze added value various types products processed by processing household industries The research was conducted Province. location selection carri...