Fisheres

Fish exploitation of the Halda River was investigated for two years period from January 2007 to December 2008 to know the variation of CPUA (Catch Per Unit Area kg.ha-1year-1) among the three studied sections, months and between two years. The mean CPUA for pooled data was 295.685, 433.219, 524.449 and 411.887 kg.ha-1year-1 for the year 2007 and 415.987, 636.808, 566.515 and 527.545 kg.ha-1year-1 for the year 2008 in upstream (section 1), midstream (section 2), downstream (section 3) and over the total study area of the River Halda respectively. Analysis of variance showed highly significant difference of CPUA among gears and months. No significant difference of CPUA was observed among sections. Combined CPUA during 2008 observed higher and statistically significant than previous year.

A report on the occurrence of Amazon suckermouth armoured catfish Pterygoplichthys pardalis (Castelnau, 1855) from the native freshwater tanks at Jangaon, Telangana State, India. The sailfin catfish belonging to the genus Pterygoplichthys of the Loricariidae family has been introduced to tropical and subtropical freshwater environments. The study was conducted for fish taxonomic identification and behaviour in the laboratory condition. This study was conformed and given information on this invasive species of P. pardalis was dug out the bottom of the soil. Ten meristic and 43 morphometric characteristics were reported in this study for identification of species. This species is radiating pattern of light lines on the head, leopard body ornamentation on the dorsal side, the ventral sucker mouth is triangular, three lips contains 16 + 16+ 32 (two groups) 0.13 mm length of tubular filamented teeth and more number of tubercles are present around the mouth.