202 research outputs found

    Preliminary experiments on the culture of the banded coral shrimp Stenopus hispidus Oliver- Winter School on Recent Advances in Breeding and Larviculture of Marine Finfish and Shellfish

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    The banded coral shrimp, Stenopus hispidus Oliver, is the largest of the known тАЬcleanerтАЭ shrimps which remove and eat parasites, injured tissue, and undesirable food particles from a large variety of reef fishes and helps to control gill, oral, and external parasites reef fishes as does by cleaner wrasses (Limbaugh et al., 1961). S. hispidus occurs throughout the Indo-Pacific region (Holthius, 1946). It is usually found in pairs in a variety of reef habitats, including under coral ledges and in natural depressions in rock formations, where reef fishes come to be cleaned. In addition to its useful ecological role, the banded coral shrimp is also a beautiful and hardy specimen, which makes it very popular in the aquarium industry. Because of this popularity, a number of attempts have been carried out to breed it on a commercial scale, but none has succeeded due to high larval mortality and failure of the larvae to settle and metamorphose (Young, 1979). The purpose of this work was to study the reproductive cycle of S. hispidus, including maturation, mating, spawning, and hatching rate, to develop techniques for rearing larvae and inducing settlement and metamorphosis of larvae

    Marine aquaria

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    There are many uses of maintaining marine aquaria. Considering the world trade of US$ 4.5 billion, there is tremendous potential for exporting marine ornamental fi shes from India. The sequences for setting up a marine aquarium such as designing and preparation of tank, biological filtration system, aeration, decoration of tanks, sterilization, lighting, maintaining water quality and feeding the fishes etc are discussed

    Fishery resources of Veraval

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    Marine production at Veraval has undergone tremendous changes. Fish production increased from 33,827 tonnes in 1983 to 47,867 tonnes in 1988 and further to 1,15, 703 tonnes in 1991. The increase in the production from 1989 was tremendous and unproportionate to the increase in the effort. This increase in the catch, although was very evident in the case of trawl landings, was also remarkable in the gill net catche

    Artificial reefs

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    Artificial reefs are natural or manmade external objects or stable structures placed in the sea to provide an artificial fish habitat and thereby to attract, aggregate and regenerate fishery resources. Artificial reefs are used worldwide to increase the productivity and fisheries potential of relatively barren or unproductive areas. Artificial reefs are also used as effective fish attracting devices during certain times of the year. Reefs when properly located and structured not only concentrate fishes but also increase the biological productivity of the area. Reefs also often serve as spawning and nursery areas for fishes and shellfishe

    Artificial reefs habitat enhancement and increasing fisheries potential

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    Artificial reefs are used throughout the world to increase the fisheries poter\tial of barren or relatively unproductive areas. Artificial reefs also act as effective fish attracting devices during certain times of the year. Reefs when properly located and structured not only concentrate fishes, but also increase the biological productivity of the area. Formation of rough rigid bottom habitat with artificial reefs of diverse materials increases the surface area necessary for fish food organisms. The reefs also often serve as spawning habitat and shelter for fishes and shellfishes

    Transportation of fingerlings and juveniles of marine finfish

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    There are two basic transport systems for live fish - the closed system and the open system. The closed system is a sealed container in which all the requirements for survival are selfcontained. The simplest of these is a sealed plastic bag partly filled with water and oxygen. The open system consists of waterfilled containers in which the requirements for survival are supplied continuously from outside sources. The simplest of these is a small tank with an aerator stone

    Fish growth parameters and their monitoring

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    Recent studies have predicted that fish consumption in developing and developed countries will increase by 57 percent and 4 percent, respectively. Rapid population growth, increasing affluence and urbanization in developing countries are leading to major changes in supply and demand for animal protein, from both livestock and fish. The need for suitable sites has resulted in the cage aquaculture subsector accessing and expanding into new untapped open-water culture areas such as lakes, reservoirs, rivers and coastal brackish and marine offshore water

    Lobster culture along the Bhavanagar coast

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    Gujarat has made tremendous strides in the marine production during the past two decades. From a humble production of 82,159 tonnes in 1971 (7.1% of all India marine production), the production increased to 2.34 lakh tonnes in 1981 (17% of all India marine production) and further to 4.92 lakh tonnes in 1990 (20.1% of all India marine production, (Vivekanandan et ah, in press). This six times increase in the fishery was exclusively from the capture fishery sector. This tremendous growth in the marine fishery, coincided with a remarkable growth in the proccessing and export industry of the region. A substantial portion of the marine catch is contributed by the Saurashtra coast. The introduction of the commerical trawlers in 1967, mainly to capture shrimps for export market and subsequent large scale expansion of the trawlers were mainly responsible for the blue revolution along the Saurashtra coast (Philipose 1992)
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