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Biology and fishery of cephalopods (mollusca: cephalopoda) along the Malabar coast

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Relation http://eprints.cmfri.org.in/7111/
 
Title Biology and fishery of cephalopods (mollusca: cephalopoda) along the Malabar coast
 
Creator Asokan, P K
 
Subject Molluscan Fisheries
Theses
Fish biology
Fish and Fisheries
Cephalopods
 
Description Cephalopoda - the octopuses, squids and cuttlefishes - comprise one of
the most significant components of marine life. All are large, fast-growing,
and active predators with highly evolved and specialized qualities of great
inherent interest. There are approximately 650 recognized species of
cephalopods alive today and more than 10,000 fossil forms. Cephalopod
translates literally into "head footed" which explains why squid, as well as
the nautilus, cuttle.fish and octopus among others, with their arms and
tentacles attached directly to their heads, is so named. Cephalopods are found
in all of the world's oceans, from the warm water of the tropics to the near
freezing water at the poles. They are found from the wave swept intertidal
region to the dark, cold abyss. All species are marine, and with a few
exceptions which tolerate brackish water.
Large populations of cephalopods are found in all the world's oceans
from the surface to the deep sea. They are major food resources for many top
predators such as whales, dolphins, seals, birds and large fish. Worldwide,
between 1990 and 1997, cephalopod landings increased steadily from 2.4
million tonnes to 3.3 million tonnes. Japan accounted for 20010 of the world
cephalopod landings in 1997 (Globefish, 1997).
Squids are by far the main cephalopod species caught in the world
representing 73% of the cephalopod world catches. During 1997, the world
total squid landings were 2.4 million tonnes. Squids represent a major
fishery resource widely distributed throughout the oceans of the world. Of
the several hundred species harvested around the world, only the Indian squid
(Loligo duvauceli) has been of major commercial importance to the Malabar
area. This species is common throughout the East and West Coast of India
The needle squid (Doryteuthis sibogae) also occurs, but only in very low
abundance. The other squid is the big fin squid Sepioteuthis lessoniana found
in the Palk Bay area where a fishery exists.
 
Date 2000
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7111/1/TH-87_Aso.pdf
Asokan, P K (2000) Biology and fishery of cephalopods (mollusca: cephalopoda) along the Malabar coast. ["eprint_fieldopt_thesis_type_phd" not defined] thesis, University of Calicut, Kerala.