The aim of this study was to compare the efficacy of cryopreservation methods for ex situ conservation of spermatozoa from far eastern catfish, Silurus asotus. The spermatozoa activity index (SAI) and hatching rates were higher in spermatozoa stored in Alserver's solution than those of spermatozoa stored in glucose solution. The SAI and hatching rates in all experimental groups gradually decrea...

Fish oil was extracted from the viscera of African Catfish using supercritical carbon dioxide (SC-CO(2)). A Central Composite Design of Response Surface methodology (RSM) was employed to optimize the SC-CO(2) extraction parameters. The oil yield (Y) as response variable was executed against the four independent variables, namely pressure, temperature, flow rate and soaking time. The oil yield v...

The effect of the pesticide endosulfan on predator-prey interactions between catfish and Schistosoma host snails was assessed in static tank experiments. Hybrid catfish (Clarias gariepinus × C. ngamensis) and Bulinus globosus were subjected to various endosulfan concentrations including an untreated control. The 48- and 96-h LC50 values for catfish were 1.0 and <0.5 µg/L, respectively, whereas ...

The diversity of fishes in Aek Sibundong, Dolok Sanggul regency, Humbang Hasundutan district, was conducted from April to October2018. aim this research analyze variety and their physical-chemical factors related fishesin Sibundong. This used purposive sampling method on four location based human activities. first stationed with no activities, the second tofu waste disposal station, third slaug...

El momento de ocupación un asentamiento prehispánico es uno los tópicos fundamentales que busca responderse a través del registro arqueológico. Las especies con marcada estacionalidad son una las principales vías para su estudio y el pez Hoplosternum littorale ellas. Este Siluriformes se distribuye ampliamente en tierras bajas sudamericanas ciclo vital incluye modificaciones sus espinas pectora...

Fish species composition and organization of the Bandama River at scientific nature reserve Lamto have been investigated for first time. The study was conducted from March 2021 to February 2022. Gillnets traps were used collect fish. A total 41 belonging 35 genera, 13 families, 5 orders captured. best-represented Siluriformes with families 11 Perciformes 3 14 Cichlidae, Mormyridae, Alestidae re...

Aeromonas hydrophila pc104A is a moderately virulent strain isolated from the soil of a catfish pond in west Alabama in 2010. Its full genome is 5,023,829 bp. The availability of this genome will allow comparative genomics to identify the virulence genes that are important for pathogenesis or immunogens for the purpose of vaccine development.

Despite African rivers containing high species diversity, continental-scale studies investigating the mechanisms generating biological diversity of African riverine faunas are limited compared with lacustrine systems. To investigate the build-up of diversity in a tropical aquatic continental radiation, we test different models of lineage diversification and reconstruct the biogeographic history...

Richard A Shelby, Lawrence J Myers, Kevin K Schrader & Phillip H Klesius U. S. Department of Agriculture, Agricultural Research Service, Aquatic Animal Health Research Laboratory, Auburn, AL 36830, USA Department of Anatomy, Physiology and Pharmacology, College of Veterinary Medicine, Auburn University, AL, USA U. S. Department of Agriculture, Agricultural Research Service, Natural Products Uti...

The U.S. marine aquaculture industry is extremely young. While catfish and trout culture have existed for many decades, the cultivation of species in marine and coastal environments has only emerged within the last 30 yr. Only 15% of total domestic aquaculture production in 1991 consisted of marine species, with oysters representing 80% of marine aquaculture production. The U.S. marine aquacult...