Summary of Abstract Submission

Abstract Submission No. IO50-09-0066PresentationPoster

SPECIES COMPOSITION, DISTRIBUTION PATTERN AND RESOURCE CHARACTERISTICS OF DEEP SEA FISHES FROM SOUTH WEST COAST OF INDIA

S. Venu*1, B.Madhusoodana Kurup2

1 DOSMB, Pondicherry University, India
2 Kerala University of Fisheries and Ocean Studies, India

ABSTRACT :

150 were recorded from southwest region of Indian EEZ between 7 and 15 N latitude at 200 -1100 m depth from 164 exploratory demersal trawl operations onboard FORV Sagar Sampada during 1998 to 2007 using 38m High Speed Demersal Trawl II (HSDT) and 45.6m Expo- model Demersal Trawls (cruise Nos. 174, 183, 189, 196, 197, 238 and 241). 40 species were circumglobal, 43 species were found exclusively to Indian Ocean. 16 were reported from Atlantic and Indian Ocean. 35 species were reported previously from the Pacific as well as Indian Oceans. Perciformes dominated with 26 species, Ophiidiformes, Anguilliformes and Gadiformes dominated in the higher depths whereas Aulopiformes dominated the lower depths. The fishable potential resources were Chlorophthalmus nigromarginatus, C. bicornis, Trichiurus auriga, Psenopsis cyanea, Neoepinnula orientalis, Psenes squamiceps and Hoplostethus mediterraneus. All the species studies were carnivores and feed on the available food in and around its habitat like Myctophids, squids, deep sea prawns like Aristeus alcocki and Heterocarpus spp. The spawning of fishes generally coincided mainly with the onset of southwest monsoon in C. bicornis, P. cyanea and H. mediterraneus. While in the case of N. orientalis and C. squamiceps, spawning is a more or less continuous process commencing from the premonsoon and continuing till the end of monsoon. The growth pattern of these deep sea fishes strongly varied from high negative allometry to high positive allometry. Hoplostethus mediterraneus and N. orientalis grow stouter in the deeper waters. P. cyanea is short lived with a life expectancy of 3.54years.