Squid Jigging Operations in the Southern Ocean

Introduction Cephalopod resources of the Southern Ocean are considered to be distinct from other oceans with high levels of endemism in squids and particularly in the Octopods (Allcock et al., 2001; Collins and Rodhouse, 2006) Loliginid squids, sepiids and sepiolids are reported to be absent in Southern Ocean and all the squids are oceanic pelagic species. Cephalopods play an important role in the ecology of the Southern Ocean and act as a linkage between abundant mesopelagic fishes, crustaceans, sea birds and whales. Cephalopods are exclusively marine predators and voracious carnivores with very high metabolic and conversion rates. They feed on live prey throughout their life cycle. The commercially important cephalopods under the phylum Mollusca include nautilus, cuttlefish, octopus and squids. Our knowledge on the food and feeding ecology of cephalopods in the Southern Ocean is limited to commercial species including neritic octopuses, cuttlefishes and loliginids, and squids of the family Ommastrephidae (Rodhouse and Nigmatullin, 1996). In the Southern Ocean, the dietary habits of only a few species have been investigated (Rodhouse et al., 1992; Jackson et al., 1998, Philip, 2001). More work is needed on the cephalopod biology for a better understanding of their role in marine ecosystems of the Southern Ocean. Squid jigging accounts for nearly 40 per cent of the world cephalopod catches followed by trawling, which contributes 25 per cent of the catch. Gillnets are also used...

To purchase this article, kindly sign in

Comments are closed.