Protandrous Hermaphroditism In Australian Silver Perch, Bidyanus Bidyanus (Mitchell, 1836)

Replacement of fish meal in diets for Australian silver perch, Bidyanus bidyanus V. Least-cost formulation of practical diets

Ž . y1 Silver perch fingerlings 80.7"1.2 g were stocked at a density of 15,000 fish ha in earthen Ž . y1 ponds 0.1 ha and cultured for six months to a market size of )350 g fish . Fish were fed a Ž . reference diet SP35; 27% fish meal or one of two test diets formulated using a least-cost linear feed formulation program and digestibility coefficients for a range of Australian agricultural Ž . Ž...

Molecular evidence for association of chlamydiales bacteria with epitheliocystis in leafy seadragon (Phycodurus eques), silver perch (Bidyanus bidyanus), and barramundi (Lates calcarifer).

Epitheliocystis in leafy seadragon (Phycodurus eques), silver perch (Bidyanus bidyanus), and barramundi (Lates calcarifer), previously associated with chlamydial bacterial infection using ultrastructural analysis, was further investigated by using molecular and immunocytochemical methods. Morphologically, all three species showed epitheliocystis cysts in the gills, and barramundi also showed ly...

Host impact of monogenean Lepidotrema bidyana infection and intensity estimates for onsite monitoring.

We developed a rapid effective method for accurate estimation of intensity for the monogenean Lepidotrema bidyana, a gill parasite of silver perch Bidyanus bidyanus. This parasite requires monitoring because high-intensity infections reduce host growth and can lead to secondary bacterial and fungal infections. The most accurate method for counting L. bidyana was visual examination of fresh gill...

Hypoxia, Blackwater and Fish Kills: Experimental Lethal Oxygen Thresholds in Juvenile Predatory Lowland River Fishes

Hypoxia represents a growing threat to biodiversity in freshwater ecosystems. Here, aquatic surface respiration (ASR) and oxygen thresholds required for survival in freshwater and simulated blackwater are evaluated for four lowland river fishes native to the Murray-Darling Basin (MDB), Australia. Juvenile stages of predatory species including golden perch Macquaria ambigua, silver perch Bidyanu...

Hermaphroditism