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Thai National AGRIS Centre was established in March 13, 1980 by General National FAO Committee, Ministry of Agriculture and Cooperatives cooperated with Food and Agriculture Organization of the United Nations. Collects information related to agricultural sciences and technologies produced/printed in Thailand including those of agricultural information about Thailand produced/printed in abroad Technical management of agricultural information system: indexing, cataloging, creating Thai Agricultural Database Care and preservation of valuable agric [...]

Conference

Conference

Some aspects on the biology of the mekong giant catfish Pangasius gigas (Chevey)  [1991]

Snit Tongsanga (Kasetsart Univ., Bangkok (Thailand). Faculty of Science. Dept. of Zoology); Saneh Polprasit;

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In order to manage the population of P. gigas for economical aspect and species conservation, khowledge on various phases of its biology are surely needed. Total of 220 fish (average, 218.1 cm in total length and 172.8 kg in weight) were collected beginning from 1984 through 1990. Male fish lead the school migrates up stream day and night for spawning. Length-weight relationships are best described by the following equation: Male, W=1.54217L** (1.49797); Female, W=0.69364L** (1.62173); Male and female (sex combined) W=1.10196L** (1.54835). Condition index of female was significantly higher than those male of the same length. Relative condition index revealed good condition in growth rate. Sex ratio (male: female) was roughtly about 2:1.