Sindhu, M.C; Dr. A. Ramachandran(Cochin University of Science and Technology, February , 2015)
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Abstract:
Transport of live aquatic organisms which is more than a century old,
perhaps started in the 1870's (Norris et al, 1960). Live fish transportation is
an essential practice in aquaculture particularly in rural areas of developing
countries representing the only means of supplying fry to small scale aqua
culturists (Taylor and Ross, 1988). Very often, large numbers of fry,
fingerlings, juveniles and adult fish are being transported from the hatchery
to fish farms, fish farms to market, processors and consumers. Live fish
command large economic importance in the fresh fish market than dead and
iced fish. Medina Pizzali (2001) observed that live fish in the Kolkata market
was usually sold at higher prices than dead fish and most consumers were
prepared to pay premium prices for live fish, which is considered as the best
guarantee of freshness, quality, and intrinsic characteristics of its flesh (better
texture and delicate flavour) in comparison with fresh/chilled seafood.
Various government and private agencies undertake transport of live fish for
commercial live fish market or for artificial propagation of game
Abdul Jaleel, K U; Dr.Damodaran,R(October 21, 2013)
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Abstract:
This thesis Entitled macrobenthos of the continental margin (200-1000m) of south eastern arabian sea with special reference to polychaetes. The continental margins are geologically complex and hydrodynamically active regions of the ocean, where vital biogeochemical processes take place from a global perspective. The Eastern Arabian Sea is one of the most productive regions of the world, and as a result, vast amount of organic matter is supplied to the sub surface waters and sea bed of the Arabian Sea. In this study, data on faunal abundance, standing crop and faunal composition, together with sedimentary and environmental parameters were collected from three depths (200m, 500m & 1000m) in nine bathymetric transects along the South Eastern Arabian Sea (from Cape Comorin to Karwar) during three surveys. In the present study, five textural classes of sediments were identified
from the SEAS margin, viz. sand, silty sand, sandy silt, clayey silt and admixture of sand, silt and clay. The composition of sand was higher in the southern region and decreased progressively towards the north. On the shelf edge and upper slope regions in the south (Cape to Kollam) in particular, sandy
sediments dominated .
Description:
School of Marine Sciences, Department Marine biology,Microbiology and Biochemistry
Thara, K J; Dr. Sajeev, R(Cochin University of Science & Technology, July , 2011)
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Abstract:
The thesis attempts to study the changes in oceanographic parameters associated with extreme climatic events,the influence of oceanographic as well as meteorological parameters on fishes.The characteristics of major pelagic fishes of southwest coast of India(Oil sardine and Indian mackerel) have been described here.A description on study area and period of study is also described .The impact of extreme climatic events on the oceanographic variability of Eastern Arabian Sea.The extreme climatic event,the Indian Ocean Dipole associated with EI Nino Southern Oscillation is taken into consideration.The variability in oil sardine and mackerel landings of southwest coast of India during the study period.The trend analysis of the landings has been done and also a prediction model is applied for the landings.The influence of environmental parameters on oil sardine as well as mackerel fishery has been explained .With regression analysis ,the significant relation between environmental parameters and fish landings are also been recognized.The prediction of landings is done with these environmental parameters.
Description:
Dept.of Physical Oceanography,Cochin University of Science and Technology
Abdu Rahiman, K P; Dr. Sunilkumar Mohamed, K(Indian Council of Agricultural Research, August , 2008)
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Abstract:
Food and feeding habits of fourteen demersal finfishes exploited off the
Karnataka coast were studied to investigate trophic interactions within the
marine food web. Index of Relative Importance (lRI),Ontogenetic, seasonal (pre-monsoon,
monsoon and post-monsoon) variation in feeding and prey-predator
relationship studies were conducted.The results of prey-predator trophic interaction studies identified four
major trophic guilds based on the predators feeding similarity.Trophic guild I is 'copepod and detritus fceders'with an average
group similarity of 61.4%. The second trophic guild, 'prawn and crab
feeders'with an average similarity of 52.7%. 'Acetes feeders', the largest trophic
guild with an average group similarity of 62.5%, composed of six
demersal finfish species.The guild 'piscivores' is
constituted by C. limba/us and P. arsius with an average similarity of
45%.For each predator, ontogenetic diet shift
is common and is characterized by prey of low to high trophic level.Strong
selection of certain prey types was observed in some predators while most
of them avoided abundant prey.In addition to Acetes spp, strong
predation impact was observed for penaeid prawns, epibenthic crabs and
detritus.This information on trophic guilds and prey-predator interactions can be
used to construct trophic model on the benthic ecosystem off Karnataka
and to investigate fishery induced changes as well as predation impact of
different animals on commercially important demersals
Description:
Central Marine Fisheries Research Institute,
Indian Council of Agricultural Research
Aleyamma, Saji Varghese; Dr. Kuruvila, Mathew(Cochin University of Science and Technology, May 19, 2005)
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Abstract:
This overall focus of the thesis involves the systematics and biology of fishes of the family hemiramphidae of cochin coast.India is one of the leading fish producing nations in the world with an average annual production of 6.1 million tonnes of fish and shell fish from capture and culture fisheries in 2001 (Ayyappan and Biradar, 2002).Fisheries play a very significant role in the Indian economy by providing employment to nearly 7 million people directly or indirectly, supplying rich protein food and earning valued foreign exchange.Fishes of the family Hemiramphidae are commonly called ‘half beaks‘.In India, studies on hemiramphids commenced with the work of Day (1878,1889) who recorded thirteen species of hemiramphids from the Indian waters.The study area, which is part of Cochin coast is located between Lat.9°28’ and 10° N and Long.76° 13’ and 76° 31 E. Lying parallel to it is an estuary which is commonly called the Cochin backwaters which has a total area of about 200 sq.miles.The study area is subjected to wide variations in salinity from place to place, season and surface to bottom.The Cochin coast and the adjacent back water system of Kerala has a rich and diversified fish fauna. The hemiramphid fishes constitute a minor fishery of this area.The study on the distribution and availability of hemiramphid fishes present in the Cochin coast shows that they evince different patterns of distribution.In the present study it is noticed that fecundity has high correlation with weight than length of the fish.Histological studies revealed that the spermatogenesis in both H. (H) limbatus and H.(H) xanthopterus, consists of spermatogonia, primary spermatocytes secondary, spermatocytes, spermatids and spermatozoa whereas in the oogenesis of both the species.biological study will be useful in implementation of proper measures of conservation and management so that further devastation of the hemiramphids of Cochin Coast can be controlled.
Description:
School of Industrial fisheries, Cochin University of Science and Technology