Throughout this investigation the effects of three commonly used agricultural pesticides, endosulfan (an organochlorine), malathion (an organophosphorous) and carbaryl (a carbamate) were studied on circulating levels of T4, T3, and the T3/T4 ratio of the fresh water catfish Clarias batrachus during the vitellogenic ( formation of the yolk of an egg) and post-vitellogenic phases of their annual ...

A total of 18 isolates of Edwardsiella tarda was successfully isolated from African Catfish (Clarias gariepinus), Red Hybrid Tilapia (Tilapia sp.), Asian Swamp Eel (Monopterus albus) and Snakeskin Gouramy (Trichogaster pectoralis). The percentage similarity of phenotypic, genotypic and proteotypic characteristics of the present isolates was ranged from 80.8 to 100%, 27.9 to 89.4% and 46.3 to 10...

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...

Catfish is one of the aquaculture products which ranks at top in amount freshwater production produced. So far, catfish has contributed more than 10% national with a growth rate 17 to 18%. The Ministry Maritime Affairs and Fisheries targets reach 22.46 million tons 2017. that Heterotrophic bacteria can be needed as organisms decompose feed residues or organic matter present on bottom water. pro...

South Africa produces both marine and freshwater aquaculture species, with a combined production output of 5418 tons food fish in 2015. Key species reportedly cultured include four – abalone, dusky kob, mussels oysters seven tilapia, trout, catfish, marron crayfish, carp, koi-carp ornamental species. The study aims to quantitatively assess the SWOT factors (Strengths, Weaknesses, Opportunities ...

—A 9-week growth study was conducted to compare the fingerling performance of two genetic groups of channel catfish Ictalurus punctatus (U.S. Department of Agriculture [USDA] 103 and USDA303) with that of blue catfish I. furcatus and their hybrid in an aquarium rack system. Fish of approximately 20 g were randomly selected from multifamily populations and acclimated to the aquarium rack system ...

Proliferative gill disease (PGD) in channel catfish Ictalurus punctatus is caused by the myxozoan parasite Henneguya ictaluri. There is no effective treatment for PGD, and mortalities can exceed 50% in severe outbreaks. One approach to controlling losses would be to utilize a less susceptible ictalurid species in pond culture; alternatively, one could identify the traits that convey resistance ...

present study describes the length-weight (lwr) and length-length (llr) relationships of a freshwater catfish eutropiichthyes vacha hamilton from indus river, sindh, pakistan. a total of 281 specimen of e. vacha were collected from fisherman?s catch from february 2005 to january 2006, are used for this study. the parameters a and b of the length-weight relationship were calculated as w= alb are...

BACKGROUND Genome annotation projects, gene functional studies, and phylogenetic analyses for a given organism all greatly benefit from access to a validated full-length cDNA resource. While increasingly common in model species, full-length cDNA resources in aquaculture species are scarce. METHODOLOGY AND PRINCIPAL FINDINGS Through in silico analysis of catfish (Ictalurus spp.) ESTs, a total ...