Length-weight relationship and certain biological aspects of the Indian white shrimp Fenneropenaeus indicus (H. Milne Edwards, 1837) exploited by trawls in the Arabian Sea off Kerala coast, India

Length-weight relationship (LWR), sex ratio and maturity of Fenneropenaeus indicus (H. Milne Edwards, 1837), was analysed based on samplings from coastal trawl fishing grounds in the Arabian Sea off Kerala coast, India. The male to female ratio (1:1.27) did not vary significantly from the hypothetical 1:1 ratio. Length at maturity (Lm50) was estimated at 122 mm total length for females. The LWR did not differ significantly between male and female shrimps. The information generated from this study will enhance knowledge on the biology of the species and assist in assessment and management of its stock

Squilloides leptosquilla, a deepsea stomatopod landed at Kalamukku Fishing Harbour, Kochi

The mantis shrimp, Squilloides leptosquilla (Brooks, 1886) was obtained from deepsea trawl operations along with the deepsea shrimps, Plesionika spinipes, Heterocarpus gibbosus and Metapenaeopsis andamanensis from the Kalamukku Fishing Harbour during September, 2008

Mixed farming or polyculture

In Kerala, nearly 75-80% of the population consume fish and their annual per capita consumption rate is about 13 kg. The rate of fish consumption is likely to go up due to increased awareness about fish as a source of cheap and highly nutritious but harmless food item. Hence there is every need to augment fish production not only to meet our food requirements but also to increase foreign exchange earnings. The current level of fish production is inadequate to fulfil all these needs. An analysis of the trend of fish production during the past few years indicates that there may not be any significant improvement in it in the coming years. In this context, measures to increase fish production are to be thought of Aquaculture is the only way to achieve this. In Kerala at present aquaculture is restricted to backwaters and inland waterbodies. In order to enhance fish production, farming of fish and other species of aquatic organisms is to be extended to inshore coastal waters for which suitable farming methods are to be adopted

The oil sardine fishery along northern Tamil Nadu coast with a note on unusually heavy landings at Cuddalore,Pazhayar and Kaveripattinam

The Indian Oil sardine, Sardinella longiceps is one of the important exploited fishery resources along the Tamil Nadu. The bulk of oil sardine were landed along the coast by the bag-net, Eda valai while lesser quantities were caught by the gill nets, Kavala valai and Thattakavala valai. Unusually heavy landings of oil sardine by the Eda valai units have been recorded at Cuddalore and Pazhayar fisheries harbours and Kaveripattinam during certain months of the period, 1989-'90. Abundance of juvenile oil sardines of the size group 110 - 114 mm was noticed during May - June, '90 at Pazhayar and in July at Kaveripattinam. Larger size groups of 175 - 179 mm predominated in September, '89 whereas in the same period of the succeeding year, 165 – 169 mm length groups supported the fishery. The unprecedented heavy landings of the oil sardine in most of the centers did not benefit the fishermen monetarily to any significant extent. Due to lack of demand for fresh fish, the bulk of catches was sun dried. Oil sardine catches are obtained along the east coast of India in areas close to harbours, backwaters and river mouths and this discontinuous distribution of fish appears to indicate its affinity, particularly juvenile phase, to areas where there is admixture of fresh and brackish water

സമ്മിശ്ര മത്സ്യകൃഷി (Mixed farming or Polyculture)

The rate of fish consumption is likely to go up due to increased awareness about fish as a source of cheap and highly nutritious but harmless food item. Hence there is every need to augment fish production not only to meet our food requirements but also to increase foreign exchange earnings. The current level of fish production is inadequate to fulfil all these needs. An analysis of the trend of fish production during the past few years indicates that there may not be any significant improvement in it in the coming years. In this context, measures to increase fish production are to be thought of Aquaculture is the only way to achieve this. In Kerala at present aquaculture is restricted to backwaters and inland waterbodies. In order to enhance fish production, farming of fish and other species of aquatic organisms is to be extended to inshore coastal waters for which suitable farming methods are to be adopted

First record of the reef lobster Enoplometopus macrodontus Chan and Ng, 2008 from Indian waters

The reef lobster Enoplometopus macrodontus was caught during the deep sea trawl operations off Chavakkad from a depth of 320 m. About ten specimens were landed at the Kalamukku Fishing Harbour, Kochi. The carapace length was 66-75 mm and weight was 79.3-94.2 g. This is the first report of the species in the Indian waters. The species has a smooth carapace with hair on the abdomen, chelipeds and telson. The morphological characters along with colour pattern are describe

Penaeus semisulcatus: A potential species for commercial culture along Tamilnadu coast

Major portion of the marine export products By value wise, is being contributed by shrimps. Three fourth of exported shrimps is from sea and The rest from culture. Since the exploitation of Shrimps has already reached optimum level in Indian coastal waters, one alternative is to Increase shrimp entering shrimp culture for Quick and high returns. Farming technology for P.monodonand P.indicus has been considerably developed than that for the other species of Indiancoast. Prime species that are cultured successfullyat present in India are P.monodon . andP.indicus in the order of trade preference. But in Japanese market P.semisulcatus, a Striped shrimp is fetching higher price than P.indicus. Information on grow-out practices of P.semisulcatusis scanty. Experimental-scale cuRurehas been attempted in Kuwait, Israel, Bahrain,Taiwan, and Malaysia

भारत की बाँगडे मात्स्यिकी की कुछ विशेषताएं

कृपया पूरा लेखा पढ

Sea ranching of prawn

Sea ranching of praw

Some characteristics of the mackerel fishery in India

The recent increases in the catch of mackerel from the deeper waters of the Calicut - Cochin area indicate that the fish move down to deeper areas during summer due to the thermocline. Spreading of trawling to deeper waters, with the opening up of export market for cephalopods, can be the reason for the increased catch of mackerel by trawls. The most successful period of recruitment to the mackerel fishery coincides with upwelling (Mackerel form large shoals to feed on the plankton that is abundant due to upwelling, making surface fishery highly successful.) which guarantees abundance of stock during the period. Intensity of upwelling increases catchability and can result in a decline in spawning stock and recruitment. This can be one of the reasons for wide annual fluctuations in the catch of this resource