54 research outputs found
Distribution, diversity and biology of deep-sea fishes in the Indian EEZ
This thesis Entitled distribution ,diversity and biology of deep-sea fishes the indian Eez.Fishing rights and responsibilities it entails in the deep-sea sector has been a vexed issue since the mid-nineties and various stakeholders have different opinion on the modalities of harnessing the marine fisheries wealth, especially from the oceanic and deeper waters. The exploitation and utilization of these esources requires technology development and upgradation in harvest and post-harvest areas; besides shore infrastructure for berthing, handling, storing and processing facilities. At present, although deep-sea fishes donтАЩt have any ready market in our country it can be converted into value added products. Many problems have so far confronted the deep-sea fishing sector not allowing it to reach its full potential. Hence, there should be a sound deep-sea fishing policy revolving round the upgradation of the capabilities of small scale fishermen, who have the inherent skills but do not have adequate support to develop themselves and to acquire vessels having the capability to operate in farther and deeper waters. Prospects for the commercial exploitation and utilization of deep-sea fishes were analyzed using SWOL analysis
Account on the deepsea shrimp Aristaeopsis edwardsiana (Johnson, 1867) from the Indian EEZ
Aristaeopsis edwardsiana (Johnson,1867) is a deepsea shrimp of the continental slope that has not yet been reported in the
targeted deepsea crustacean fishery along the Indian coast. An exploratory survey on-board FORV Sagar Sampada in the
Arabian sea at a depth of 950 m off Trivandrum (lat. 8 0 28тАЩ N and long. 76 014тАЩ E) yielded a catch of A. edwardsiana at a
high catch per unit effort (CPUE) of 14 kg h-1. The biological aspects of this less known deepsea shrimp species such as
length frequency distribution, morphometric relations, sex ratio and the additional sexual dimorphism manifested in the
antennal scale of males are reported
Distribution and biology off the deep-sea eel, Gavialiceps taeniola along the continental slope off Indian EEZ
The distribution, abundance and biological characteristics of the deep-sea eel Gavialiceps taeniola
(Alcock,1889) caught by deep-sea trawling on board FORV Sagar Sampada along the continental slope in
the depth zone 200 тАУ1000m, off the west and east coast of India are reported. This species was found
abundant at 100N and 800E in east coast and in west coast at Lat 90N and Long 750E. Females dominated the
catch. Length range varied from 16 to 82 cm. The b value in length weight relationship was < 3, which
showed that the fish becomes slender as length increase
Shrimps of the family Pandalidae (Caridea) from Indian waters, with new distributional record of Plesionika adensameri (Balss, 1914)
Twenty four species of Pandalid shrimps reported from the
Indian waters, of which six genera (Chlorotocella, Chlorotocus,
Chlorocurtis, Dorodotes, Heterocarpoides and Stylopandalus)
are represented by single species each. The genera, Plesionika
and Heterocarpus are represented by eleven and seven species
respectively. Plesionika adensameri (Balss, 1914) a deep-sea
shrimp hitherto unreported from Indian waters is recorded from
west coast of India. Information on some biological aspects of
few Pandalid shrimps from Indian waters is also reported in the
present paper
New distributional records of deep-sea sharks from Indian waters
This paper reports the first documented record of three deepwater sharks from Indian waters i.e.,
Hexanchus griseus (Hexanchidae), Deania profundorum (Centrophoridae), pygmy false catshark
(undescribed) (Pseudotriakidae) and presents a taxonomic account of smooth lanternshark, Etmopterus
pusillus (Etmopteridae) and leafscale gulper shark, Centrophorus squamosus (Centrophoridae), caught
by hooks & line units operated in the Arabian Sea, west coast of India and landed at Cochin Fisheries
Harbour (Kerala), southwest coast of India
Population dynamics of cobia Rachycentron canadum (Linnaeus, 1766) off Cochin coast, south-eastern Arabian Sea
Estimated landings of cobia from the Indian EEZ by the commercial fishing vessels are mostly as bycatch in hooks and line
cum gillnet and trawl nets. However, the catches are substantial compared to that reported in several other countries of Asia.
The species is also gaining considerable importance as a favoured candidate species for sea farming using cages. Very little
is known about the fishery and biological characters such as maturation, fecundity and feeding preferences of cobia in Indian
seas. Study indicated a fast growth rate with estimates of LтИЮ = 184 cm (FL) and K = 2.6 (yr-1) in cobia. The total mortality rate
(Z) was estimated as 5.18, natural mortality (M) was 2.01 and fishing mortality (F) was 3.17 with an exploitation rate (E) of
0.61. The length at first capture (Lc50) estimated from the catch curve was 72 cm. Fecundity was found to be high and
variable, with mean fecundity estimated as 12,37,545 eggs with a coefficient of variation (CV) of 16.7. As inferred from the
oocyte development pattern, spawning activity is brief and fish is classified as synchronous ovulatory type. The growth
parameters and condition factor estimated in this study indicate that relatively high growth rates are also possible in wild
stocks considering that food is abundant and the environmental temperature is in the optimum range. Feeding
preferences indicated balistid fish and shrimps with a wide variety of food items including finfishes, crustaceans and molluscs
present
Morphometric characteristics of the pelagic stingray Pteroplatytrygon violacea (Bonaparte, 1832) caught off Cochin, southwest coast of India
The morphometric characteristics of the pelagic stingray Pteroplatytrygon violacea (Bonaparte, 1832) are
described for the first time from the Indian waters. The specimen was collected at Cochin in August, 2008.
The mature male specimen measured 102 cm in total length, 47 cm in disc width, 35 cm in disc length and
weighed 2.5 kg. The morphometric characteristics of the specimen were very similar to that described from
the North Sea
Morphometric characteristics of deepwater stingray Plesiobatis daviesi (Wallace, 1967) collected from the Andaman Sea
The present paper reports on the morphometric characteristics of two specimens of Plesiobatis daviesi
collected during the deep-sea fishery resource survey of FORV Sagar Sampada in the northeastern Andaman Sea off Diglipur (130 14тАЩ N lat; 930 09тАЩ E long.) at 320 m depth and off Mayabandar (120 48тАЩ N lat; 930 07тАЩ E long.) at 369 m depth
Shrimp Trawling in the Deep Sea: Status and future challenges
The current level of fish harvest exhibits serious threat to the fish food security in
the country and poses the need to explore, identify and utilize nonconventional
fisheries resources. Kerala is one of the coastal states of India where the deep
sea shrimp trawling operations were carried out on a large scale since a decade
back. Presently the annual deep-sea shrimp landings showed an overall
decreasing trend. The present study analyzed the impediments in deep sea shrimp
fishery operations and revealed that the high operational cost, high risk and
efforts, lack of skilled and trained manpower, low market price realisation,
abundance of discards, poor quality of shrimps, low level of harvesting
technology perceived a major hurdles in deep sea shrimp fishery sector. The
study suggests the need for improved governmental support in deep sea
operations for the sustenance of the sector in ensuring fish food security for the
Kerala populace
An account of hexactinellid sponge, Hyalonema (Cyliconema) apertum apertum collected from Andaman waters
The hexactinellid sponge collected aboard FORV Sagar Sampada from the eastern side of North Andaman waters at 13o06тАЩ N lat. and 93o11тАЩE long. was identified as Hyalonema (Cyliconema) apertum apertum. This species, collected at a depth of 402 m, belonged to the Class Hexactinellida, Order Amphidiscosida and Family Hyalonematidae. The body is spindle-like, followed by basalia in the form of long twisted spicules. Identical specimens collected from 12o57тАЩ N lat. & 93o07тАЩ E long. and 12o45тАЩ N lat. & 93o09тАЩ E long.
confirmed the presence of H. (Cyliconema) apertum apertum in the Central Andaman waters too. The present communication describes the characteristic features of H. (Cyliconema) apertum apertum along with a detailed account of the types and dimensions of spicules
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