Effect of 17α-methyl testosterone incorporated diets on growth of spotted snakehead, and white carp, .

The effect of different concentrations of 17α-methyl testosterone incorporated diet on growth performance in the fry of and was evaluated Four different doses of hormone such as 60, 80, 100 and 120 mg/kg in and 40, 60, 80 and 100 mg/kg in were administered through diet for a period of 90 days. Fifth group on a hormone free diet served as a control. The growth performance in terms of length and weight gain of the fry receiving 100 mg/kg in and 60 mg/kg in were significantly higher than those receiving 80, 120 and 0 (untreated control) mg hormone per kg feed.

Unraveling a 146 years old taxonomic puzzle: validation of Malabar snakehead, species-status and its relevance for channid systematics and evolution.

Background: The Malabar snakehead Channa diplogramma is one of the most enigmatic and least understood species within the family Channidae, which comprise one of the most important groups of freshwater food fish in tropical Asia. Since its description from peninsular India in 1865, it has remained a taxonomic puzzle with many researchers questioning its validity, based on its striking similarity with the South East Asian C. micropeltes.