Occurrence of Tachysurus dussumieri (Valenciennes) with incubating young ones off Mangalore

Muthiah, C and Rao, G Syda (1985) Occurrence of Tachysurus dussumieri (Valenciennes) with incubating young ones off Mangalore. Marine Fisheries Information Service, Technical and Extension Series, 61. pp. 14-15.

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Abstract

During the course of routine observations on the purse-seine landings at Mangalore, a catch of about 21t of catfish (Tachysnrus dussumieri) was noticed on March 1982. They were netted in a single haul by a purse seiner off the New Mangalore harbour at a depth of about 10 m. Earlier observations along the Mangalore coast show that this species spawns only once a year during the period from December to March with peak in February. The T. thalassinus releases the young ones from its mouth when they are smaller in size as compared to T. dussumieri which retains the young ones measuring upto 78 mm in their mouth. The species could hold in their oro-buccal cavities as high as 100 or even more developing eggs ensuring perhaps a high hatching and survival rate.

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