Studies on some aspects of biology and fishery of the cockle, Anadara granosa (Linnaeus), from Kakinada bay

Age and growth of A,granosa has been studied by an examination of the size-frequencies of random samples for the period from April 1965 to September 1966. The cockles measure 31 -5 mm. in length at the end of the first year and 49.3 mm. at the end of the second year of life. No growth rings were noticed to be of use in age determination. The commercial catches chiefly consisted of '0' and 1 + age groups in the year April 1965 to March 1966. The cockles reach sexual maturity when they measure 21 mm. and about 7 months old. They appear to breed throughout the year. There is a peak spawning activity in January- April period. The length-weight relationship has been studied

Fishery and biology of cephalopods

They are purely marine in habitat .Among the cephalepods several species of squids, cuttlefishes, optopus are commercially important

Clam culture

The hatchery technology for the large scale production of the seed of A.granosa, P.malabarica, M.meretrix and M.casta has been developed by the CMFRI

The blood clam culture

The Blood clam Anadara granosa (Linnaeus) is widely distributed in the Indo-Pacific. Besides being an important resource for the capture fishery in several countries, it is extensively cultivated in Japan, Malaysia, Republic of China, Thailand and Taiwan. This species occurs in stray niunbers along the Indian Coast and is unique in that it forms a fishery of some magnitude (2000 t/year) only in the Kakinada Bay. Based on the experiments conducted in 4 seasons during 1979 - 82, simple techniques for augmenting the production of A. granosa by transplantation, were developed by the Central Marine Fisheries Research Institute at Kakinada

The windowpane oyster resources of Kakinada Bay

Among the commercially exploited bivalve mollmcs in India the windowpane oyster Placenta placenta (Uniiaeus) (Talapu gulla in Telugu) is next in importance to the clams in quantitative abundance. A major fishery for this species exists in the Kakinada Bay where the annual production is about 50001. Production is about 1500 t/year of empty shells in the Kndhara Bay in the Gulf of Kutch and about 350 t/year in Naukim Bay at Goa. In the fishery at Kakinada Bay about 300 plank-built boats are deployed. This species occurs in stray numbers at several other centres along the Indian Coast. Considerable quantities of the shell are also collected from the subsoil deposits, particularly from the Vembanad Lake in Kerala State

Technology of mollusc culture

THE molluscs are an important group of shellfish and are exploited along the Indian coasts. Their meat is used as food; the shell is an important raw material in lime based industries and also in making curios. In temperature countries culture of molluscs such as oystelS, clams, mussels scallops and abalones is widely practised to augment production. In India, technologies for fanning several species of molluscs have been developed during the past two decades, mainly due to the efforts at the Central Marine Fisheries Research Institute (CMFRl)

Technology of cephalopod scallops and abalone culture

Our- present knowledge on cephalopod culture is limited to rearing of t he squid/cuttlefish from egg to maturity in tanks or ponds and commercial culture is not practised anywher

Clam culture

Bivalves such as oysters, mussels, clams and cockles are widely distributed both in the tropical and temperate waters. In recent years, they have emerged as a delicacy and luxury food items in Japan, USA and western Europe

Kakinada Bay fisheries - Nostalgic memories

In 1978 work was initiated to culture the -blood clam Anadara granosa in the Bay. A 100 m2 area was selected, an elderly clam fisherman from the village was entrusted with the watch and ward. Wide publicity was given in the village to create awareness. In the evening, the site was fenced with dry palmyra leaves (to serve as pen enclosure). Nylon netting was not preferred due to possible poachin