Investigations on the Feeding and Spawning in Bagarius bagarius from Manchar Lake District Jamshoro, Pakistan
Investigations on the Feeding and Spawning in Bagarius bagarius from Manchar Lake District Jamshoro, Pakistan
Bushra Shaikh1*, Naeem Tariq Narejo2, Faheem Saddar3, Muhammad Hanif Chandio4, Majida Parveen Narejo5, Urooj Imtiaz2, Athar Mustafa Laghari4, Ghulam Abbas5 and Shahnaz Rashid5
ABSTRACT
An investigation on the feeding and breeding in Bagarius bagarius was examined from Manchar Lake District Jamshoro, Sindh, Pakistan. Total 62 samples were accessed at different length groups during April-September 2022. The range of samples was between (10.0 to 70.0 cm) and from (28-3500 g) in total length and weight respectively. For food determination the experimental fish was divided into three length groups viz., small (10.0-15.0 cm) medium (15.1-30.0 cm) and large (40.0-70.0cm) for the determination of feed preference. The results of the investigations revealed that the food fondness of B. bagarius was detected as highly carnivorous (Piscivorous) displayed higher preferences for fish (46.6 %) seconded by insect larvae (20 %) and 3rd preferred was debris (15.4 %). For breeding analysis values of ova diameter were found to be ranged between 0.55-1.0 mm, the gonadosomatic index (GSI) values were also from to be increasing from 0.71-6.5% and from 0.82-10.28% for both the sexes. These values remained high during April to August. It indicated that the fish spawned once in a year in July. Outcomes of egg estimation during the examination depended on 10 matured B. bagarius from Manchar Lake. Fecundity ranged between 260-554 eggs. Least egg estimation 260 was detected from fish of 41.8cm and 88.0 g in length and weight. The highest egg was 554 from 59.0 cm and 155 g in both length and weight. Total body length exhibits better relationship with fecundity of experimental fish B. bagarius from Manchar Lake than the other parameters.
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