Aquaculture has been a fast-growing industry because of significant increases in demand for fish and seafood throughout the world. Its economic importance is increasing economically. Aquaculture -also known as fish or shellfish farming -refers to the breeding, rearing, and harvesting of plants and animals in all types of water environments including ponds, rivers, lakes, and the ocean. Research...

The sex ratio, gonadosomatic index, stages of gonadal development and fecundity of sompat grunt Pomadasys jubelini off Lagos coast, Nigeria were investigated. P. jubelini had sex ratio of 1: 0.85 (male to female). The difference in sex ratio was not significantly different (p > 0.05) from the expected 1:1 distribution. Gonadosomatic index ranged from 0.07 to 7.29% with mean of 2.25 ± 0.08%. Hig...

The Siberian sturgeon (Acipenser baerii) is an economically important species. Sturgeon stockassessment during fingerling production is considered to be one of the most difficult phases ofhatchery rearing. The present study investigated the expression of growth hormone (GH)mRNA in unfertilized eggs, fertilized eggs, eyed eggs (2 day before hatching), non-viable eggsand newly-hatched Siberian st...

Pulse flow, which includes base peak flow duration, occurrence time, and frequency, is a manifestation of environmental in rivers. This paper describes methodological framework for determining pulse based on an analysis fish spawning behavior presents its application to the second Songhua River northeastern China. Peak was determined hydrographic-habitat relationship conjunction with physical h...

  Fungal infection in the eggs of freshwater fish is well known as a problematic disease. The aim of the present study was to isolate and identify parasitic and saprophytic fungi from affected eggs of rainbow trout at two fish hatchery in Kermanshah province. The sample were inoculated in culture media (SDA,CMA,GPA and stilled water with cotton seed culture) at room temperature (18-24 ° C).17 s...

González-Esquerra, R. and Leeson, S. 2001. Alternatives for enrichment of eggs and chicken meat with omega-3 fatty acids. Can. J. Anim. Sci. 81: 295–305. Interest on the enrichment of eggs and poultry meat with omega-3 fatty acids (n-3 FA) has increased given their important role in human metabolism. The inclusion of n-3 FA into eggs and poultry meat is achieved by feeding ingredients such as f...

Animals and plants are increasingly threatened by emerging fungal and oomycete diseases. Amongst oomycetes, Saprolegnia species cause population declines in aquatic animals, especially fish and amphibians, resulting in significant perturbation in biodiversity, ecological balance and food security. Due to the prohibition of several chemical control agents, novel sustainable measures are required...

The osprey (Pandion haliaetus) population nesting along the main stem Willamette River and lower Santiam River was first studied to evaluate contaminants and reproductive rates in 1993 when 78 occupied nests were present. By 2001, the population increased to 234 occupied nests, a 13.7% annual rate of population increase. A sample egg was collected from each of a series of nests along the Upper ...

Brown trout (Salmo trutta) broodstock from a single population were separated prior to spawning and exposed to two different holding environments: a ‘raceway system’ and a ‘tank system’. Eggs were stripped from females and 13 measures of egg quality were collected, analysed individually, combined by principle components analysis into an integrated egg quality score which was validated against e...