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Theses (PG)

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2006 - 2009112010 - 201830
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Subject: Fisheries Resource Management × End date: 2018 × Type: Thesis ×
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Now showing 1 - 9 of 41
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    ThesisItemOpen Access
    “STUDIES ON SOME BIOLOGICAL ASPECTS OF THE BLACK BANDED TREVALLY, SERIOLINA NIGROFASCIATA (RUPPELL, 1982) ALONG THE MANGALURU COAST”
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2018) KALAVATHI N.R.,; MANSING NAIK)
    The black-banded trevally, Seriolina nigrofasciata found In indo-west pacific, from eastern coast of Africa to Australia, north to southern Japan. Seriolina nigrofasciata (order: perciformes, family : Carangidae ) is a non-schooling carangid fish which occurs at the depth from 20-150 m and is commonly found in offshore reefs over the continental shelf on rocky bottom. This species is also called as “black banded king fish or butter fish” and locally called as “Neyyi meenu”. The present study is based on the observation of a total 627 individuals ranging in size from 15 to 63 cm total length (TL) comprising 280 males and 347 females. The length-weight relationship for male was W= 0.0179L2.9596 and for female W=0.0186L2.9156 . The relative condition factor (Kn) values for male and female varied from 0.9727 and 1.3307 respectively. Analysis of the gut content indicated that fish is carnivore and the diet was composed of Semi-digested matter 68.04 %, teleost 20.80 %, molluscans 16.66 %, crustaceans 3.49 %. The size at the first maturity for male and female appeared at a length of 36 cm and 39 cm TL respectively. The sex-ratio of male:female was found to be 1:1.23 in the commercial catches, showing dominance of female in the population. The Ganado-Somatic Index values ranged from 0.2149 to 2.1769 in male and in case of female, it fluctuated between 0.2342 to 3.9696. The fecundity ranged from 1,92,295 to 7,60,248 eggs with an average 5,02,906 eggs per individual . The ova diameter ranged from 0.01 to 0.5mm. The maturity stages of Seriolina nigrofasciata indicated that this species is a annual single spawner during November to febraury. Proximate composition revealed that fish muscle has 74.03 % to 83.12 % moisture, 14.58 % to 21.87 %. protein, 0.57 % to 3.66 % fat, and 0.86 % to 1.64 %. of ash.
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    ThesisItemOpen Access
    TROPHIC INTERACTION IN COMMERCIALLY EXPLOITED DEMERSAL FINFISHES WITH EMPHASIS ON ONTOGENIC DIET SHIFTS
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2018) BHAVANJALI M.R; MRIDULA RAJESH
    Trophic interactions in seven commercially exploited marine demersal finfishes of Karnataka were studied to understand the trophic organization with an emphasis on ontogenic diet shifts and trophic overlap. In total, 4723 stomachs were examined of which 73 prey items were identified. Crustaceans and fishes formed the major prey item. Based on cluster analysis of predator feeding similarities and ontogenic diet shift within each predator, two major trophic guilds were identified. The first guild of ‘crustacean feeders’ included all size groups of Nemipterus japonicus, N. randalli, O. cuvieri and Priacanthus hamrur. The second trophic guild, ‘piscivores’, was mainly made up of larger size groups of all predators and all size groups of Saurida tumbil and S. undosquamis. The mean diet breadth and mean trophic level showed a strong correlation with ontogenic diet shift. TROPH values ranged from 3.4-4.6 for species indicating carnivorous diet pattern of the species. All the species were carnivores and the extent of carnivory increased with ontogeny. It is clear from the present study that most of the species when they were young preferred crustaceans, other invertebrates and smaller fishes but the preference changed for teleosts and other carnivores as they grew in size and age. A seasonal variation in the diet pattern observed was due to variations in prey abundance. Trophic network analysis showed maximum prey in Trophic level III and any alterations due to ecological or anthropogenic activities affecting the prey would result in alterations in community dynamics of the predators.
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    ThesisItemOpen Access
    STUDIES ON BENTHIC DETRITAL AGGREGATE FORMATION IN CULTURED SHRIMP POND
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2012-03) PRA VEEN, G. P.,; GANGADHARA GOWDA; E. G. JAYARAJ; M.N. VENUGOPAL; H.N. ANJANEYAPPA; C. H. KRISHNA BHAT
    India is a vast country with having varied and enriched natural resources. The natural resources like freshwater, marine water and the brackish water are important in production and development of resources. India has huge potential brackish water resources and these brackish water resources include estuaries, coastal lagoons, mangrove swamps and coral reefs supports a varied biological resources, such as fishes, prawns/shrimps, crabs, mussels, (clams, cockles, and oysters), lobsters, and other with their seed resources as well as sea weeds. India has 1.30 million ha. brackish water area suitable for aquaculture. (Ghosh, 2010). Out of which, at present about 1.41 lac. ha. area is presently under aquaculture (traditional, improved extensive and semi-intensive systems). And the estuaries covered along North Kanara district are Kalinadi, Aghnashini and Sharavati. The mid 1980s to early 1990s was a period of rapid growth in the production of cultured shrimp, particularly in South East Asia and Central America. Overall global fish production was estimated to be 140 million tons during 2009. Aquaculture production has contributed to 36 million tons in 2002 and reached to 50.3 million tons in 2OO7.This indicated that 6.5% growth was recorded in aquaculture alone. Shrimp production from both capture and culture was accounted to be 6.6 MT in 2009. China, leading first in shrimp production with 2.7 MT, followed by India and Thailand. However, the shrimp aquaculture industry has received unprecedented criticism for unsustainable practices. This has included the discharge of pond waters of high nutrients load and contributed to high phytoplankton to cause eutrophication of coastal waterways, destruction of mangrove and wetland habitats and depletion of world fish stocks to make shrimp feed. 4'he continuation of unsustainable practices has the potential to significantly hamper production of shrimp. The future of the shrimp industry relies on the development of more sustainable and best management practices.
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    ThesisItemOpen Access
    DNA BARCODING OF THREE ENDEMIC SPECIES OF GENUS BARILIUS (FAMILY: CYPRINIDAE) FROM WESTERN GHATS, KARNATAKA
    (Karnataka Veterinary Animal And Fisheries Sciences University, Bidar, 2016) VENUGOPAL, R.B.F.Sc
    India is rich in fishery resources and comprises of around 3315 fish species (ICARNBFGR,Annual report: 2014-2015).
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    ThesisItemOpen Access
    VALIDATION AND COMPARISION OF SPICIES IN NOTIFIED POTENTIAL FISHING ZONE (PFZ) AND NON-NOTIFIED AREAS OFF MANGALORE
    (Karnataka Veterinary Animal And Fisheries Sciences University, Bidar, 2007) SHILPA K, B. F. Sc.
    During 2005, the estimated marine production of India was 2.28 MT registering a 12% decrease in the catch as compared to the previous year. This is due to decline in the catches of Oil Sardine, mackerel, lesser-sardines, croakers, ribbon-fish, seer-fish, shrimps and Cephalopods. There was marginal increase in the catches of Bombay duck, Carangids and non- penaied shrimp. Contribution from the west coast accounted for 67% of total landings. The pelagic fin-fishes contributed 55% and demersals 26%, crustaceans 15% and molluscas 4% to the total landings
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    ThesisItemOpen Access
    Identification of Nemipterus randalU Russell, 1986 using DNA barcoding
    (Karnataka Veterinary Animal And Fisheries Sciences University, Bidar, 2014) SARITHA.S
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    ThesisItemOpen Access
    STUDIES ON BIOLOGICAL ASPECTS OF THE CRAB, CHARYBDIS LUCIFERA (FABRICIUS, 1798) OFF MANGALURU COAST
    (Karnataka Veterinary Animal And Fisheries Sciences University, Bidar, 2016) SUMA, B.F.Sc
    Fishery resources are renewable living resources that demand judicious exploitation for obtaining sustainable yield and the crustacean fisheries of India have been assumed significance in recent years
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    ThesisItemOpen Access
    STOCK STRUCTURE ANALYSIS OF SPLENDID PONYFISH, EUBLEEKERIA SPLENDENS (CUVIER, 1829) ALONG THE INDIAN COAST USING TRUSS NETWORK SYSTEM
    (Karnataka Veterinary Animal And Fisheries Sciences University, Bidar, 2016) SHOBHA RAWAT, B.F.Sc.
    In the marine ecosystem stocks are distributed over the extensive geographical areas with no clear geographical and oceanographic barriers
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    ThesisItemOpen Access
    STUDIES ON SOME ASPECTS OF THE BIOLOGY OF SAURIDA GRACILIS (QUOY & GAIMARD) OFF MANGALORE COAST
    (Karnataka Veterinary Animal And Fisheries Sciences University, Bidar, 2006) NAGARATHNA . R., B.F.Sc
    Fishes of the family Synodontidae or Scopelidae (Order: Myctophiformes) are popularly known as lizardfishes, which have a wide distribution in the Indo-pacific region. The principal regions supporting lizardfish fishery are East coast of Africa (excluding Kenya and Somalia), Madagaskar, Red sea, the Gulf, Pakistan, East and West Coast of India SriLanka, Malay Archipelago, East Indies, Australia, Gulf of Thailand, Philippines, China sea, Taiwan and Japan.