Filter-feeding fishes have been examined as biological controls of phytoplankton populations. Although increased phytoplankton biomass resulted in approximately 50% of studies and no effect in 25% (Smith 1988), changes in species composition and dominance have been noted. For example, blue tilapia Oreochromis aureus reduce or eliminated blue-green (Cyanobacteria) and green (Chlorophyta) net phy...

The Flavobacterium columnare heat shock protein (HSP) gene dnaJ* was isolated, cloned, expressed, and used as an antigen in a recombinant vaccine strategy for channel catfish Ictalurus punctatus. The F. columnare dnaJ* sequence was obtained from genomovars I and II and showed intraspecies variability. Recombinant protein was expressed and purified from Escherichia coli cultures and injected int...

This study was conducted to determine the influence of oil sources on growth performance fish common carp Cyprinus carpio. Four diets were formed which similar in their protein content and contains four different [Corn (A), palm (B), sunflower (C) (D)] 64 average weight ranged between (1.598 - 1.544) g distributed randomly eight plastic circular form basins with capacity 20 liters water. Feedin...

histological development of digestive tract of the persian sturgeon (acipenser persicus) from hatching to fingerling size was studied using light microscope. the digestive tract of newly hatched larvae was a simple tube which continued from mouth to anus. in 7 days post hatching, digestive tract became differentiated and secretion was started smoothly, with appearance of goblet cells in epithel...

Abstract Provision of suitable technique for saline tilapia seed is required since demand these species increased continuously. Most rely on sourcing freshwater fingerling and further acclimatized in brackishwater ponds. The study aimed to evaluate the effects various fry densities production parameters under high salinity-biofloc system. Three being tested cultured biofloc technology (BFT) at ...

Iran contributes to the stock enhancement of several economically valuable fish species, including the Caspian salmon, S. trutta caspius, by producing and releasing millions of fingerlings into the sea. This work was conducted to determine the production costs of the Caspian salmon fingerlings in the years 2002 and 2003. For this purpose, a questionnaire was prepared and filled in by an expert ...

California yellowtail (CYT; Seriola dorsalis) is a promising candidate for marine aquaculture in the United States because there an existing market and cultured spp. command prices as high $27.70 per kg head-on gutted product. Methods commercial-scale fingerling production growout have been refined globally recent years. Spawning can be accomplished without hormone therapy adults spawn viable e...

A 12-week laboratory feeding trial was performed to evaluate the efficacy of two different algae based value added feeds (one containing Spirulina platensis and Enteromorpha intestinalis and the other with Phormidium valderianum and Catenella repens) against conventional (rice bran and mustard oil cake taken in 2:1 ratio, used as control) for fingerlings of Indian major carp, Rohu (Labeo rohita...