On a Baleen whale landed at Hollengade, Karnataka coast

A report on the landing of a dead whale, belonging to the genus Balenoptera, on 29th April 1987 at Hollengade 7 km south of Kumta, Karnataka

On a large devil ray landed at Karwar

The article describes about the landing of unusually large devil ray (Manta birostri) at Karwar during 1987

Unusual fishery of Parapenaeopsis acclivirostris in Tadri area (Karwar)

The occurrence of Oratosquilla nepa and Acetes johni, only for a few days before the beginning of the night fishing for prawns, serves as an indicator of the commencement of the intensive prawn fishery in the Tadri area of Karwar. The Acetes johni forms favourite food item of some fishes, which is related to the appearance of Lepturacanthus savala at Tadri. trawlers. Once P. acclivirostris which is called as young 'Karikadi' landed from 18-20 fathoms depth amounting to as high as 350 kg/boat. The observations provide a clue to the appearance of prawns from south to north at the beginning of the prawn fishery season in the Tadri-Karwar area during November over the years. This may help the fishermen to plan their fishing activities accordingly

Fishery and biology of the crab Portunus sanguinolentus (Herbst) along the South Kanara coast

The fishery of the crab Portunus sanguinolenttis along the South Kanara coast extends generally from, December to May. The catches of the species at Mangalore during 1979-80, 1980-81 and 1981-82 are estimated respectively at 102.3 t, 100.2 t and 57.0 t. The catches at Malpe during 1980-81 and 1981-82 are at 65.9 t and 44.1 t, respectively. The carapace-width-body-weight relationship does not differ between sexes. Spawning takes place throughout the season, with peaks in February and April-May. Males are in excess of females, differing though not significantly from the expected 1 : 1 ratio. Fecundity is estimated to be ranging between 0.03 million (in a specimen of 83-mm carapace width) and 0.07 million (in a specimen of 113-mm carapace width), suggesting a positive relationship between size and fecundity. The L^, and e"'' values are found respectively at 173 mm and 0.7 in males and 163 mm and 0.75 in females

Trawl fishery of South Kanara with special reference to prawns and by-catches

An appraisal of the trawl fishery based on the data collected from Mangalore and Malpe during the fishing seasons 1980-81 and 1981-82 were attempted.The prawns alone contributed around 70-75% of the total value realised,although it formed only 13% of the annual average trawl catch. The landings of the important groups like Prawns, Fishes, Stomatopods, Crabs, Cephalopods by trawl nets at Mangalore and Malpe were compared. Among different species of prawns,P.stiilifera and M.dobsoni were the dominant species contributing around 80-85% of the annual prawn catch. Landings were generally high during September and January- May at both the centres.By-catches in trawls includes fishes,cephalopods,crabs and stomatopods.The main species according to its availability and importance landings were studied and explained.In fish species species, Silver bellies, are dominant ,contributing to 31.2% and 24.5% at Mangalore and Malpe respectively. The average auctioning rates of different category of prawns at Mangalore were also discussed

On the fishery of Acetes johni at Karwar and Tadri

The article describes about the fisheryt of Acetes shrimps, Acetes johni during 1986 at Karwar

Larval development of Metapenaeus moyebi (Kishinouye) reared in the laboratory

The complete larval development of Metapenaeus moyebi was studied by rearing them in the CMFRI laboratory at Karwar. The viable eggs take 8i to 10 hours to hatch out and the duration of nauplius stage ranges between 37 and 44 hours. The protozoea transforms into mysis after 5 to 5i days. The mysis stage lasts for 91/2 to lO1/2 days. Complete larval development from egg to postlarva I takes 16-181 days. There are 6 nauplius sub-stages, 3 protozoea substages, 3 mysis substages and 1 intermediate stage during the course of development. The detailed structure of the larval substages is described and illustrated in this paper

On a whale shark Rhineodon typus smith Landed at Karwar, Karnataka

A female whale shark, Rhineodon typus Smith, measuring 8.81 m in total length was landed at Karwar in the third week of January 1981 [reported as measuring 3.81 m in length (Anon 1981)]. This is the first record of such an occurrence in North Kanara District

Preliminary hydrobiological studies on the Kanasgeri backwaters

Preliminary hydrobiological in't^stigaitions of the Kanasgeri backwater area ; adjacent to the Kali estuary in Noitfi rKanarft carried out during September 1976- • August 1977 revealed that the area'could be utilised for aquacUlture purposes

A case study of the economics of a traditional prawn culture farm in the North Kanara district, Karnataka, India

Economics of a traditional prawn culture farm situated on the northern bank of Badagani river near Haldipur in the North Kanara district, Karnataka, India is studied. The farm extends over 0.78 hectare and has a single wooden sluice gate. Culture of Penaeus indicus, P. Monodon, Metapenaeus monoceros and M. Dobsoni was initiated in January and continued up to may 1979. The traditional practice of trapping and holding was followed in stocking the farm. In all, 375 kg of prawns valued at Rs. 10,470.00 !were harvested of which. 52% comprised P. indicus and P. monodon. A profit of Rs. 7,770.00 was earned by the entrepreneur after meeting expenditure on the farm. An overall review of the economics of prawn culture in the area is given