World Congress on
Recent Advances in Aquaculture Research & Fisheries

Biography:

Abstract:

Length-Weight relationship was studied in Oreochromis lidole (Trewavas, 1941), for Republic of Malawi. The slope value (b) estimated for O. lidole of both sexes was found to be 1.4889. The regression equations calculated for both sexes was Log W = -2.2636 + 1.4889 Log L The correlations coefficient was found to be significant (P<0.01). The significant difference between sexes of this species ‘F’ value was at 1% level. The b value differed from the ideal cube law of ‘3’ as is with the case of length-weight relationship studied in Mangochi, Malawi, Central Africa. The slope value was compared here could be very useful for comparison with the tilapia species in other geographical locations.

Biography:

Abstract:

Puffer fish are commonly distributed in the tropics, but are relatively uncommon in temperate regions and completely absent from cold waters. These fishes are the second most poisonous vertebrate in the world. Puffer fishes are diverse group of aquatic organisms and are non-target species incidentally or accidentally caught by trawling in India. These fishes are  known  to  contain  a  toxin called  Tetrodotoxin  in  the  skin,  liver,  gonads  and  intestines, it is highly toxic to humans. Puffer fish poisoning is considered to be the common cause of fish poisoning along the Asian coast and local Puffer fish poisoning are also reported in Andaman Islands. In the Andaman waters, these animals are commonly found. In the South Andaman Sea, a total of 16 species belonging to the family tetraodontidae (13 species) and Diodontidae (3 Species) are reported. The identification of Tetraodontiformes is very difficult due to their analogous nature and their biological study in India is in insufficient level due to their poor taxonomic descriptions. Hence, they are treated as trash fish and dumped with other uneconomical fishes. Even though puffer fishes are toxic, they are considered as delicacy in many countries especially Japan. These countries investigate the food resource and gut content analysis of puffer fishes. These studies could provide essential information about nutrients requirements of puffer fishes, which are helpful for formulating the artificial feed for the fish cultivation commercially. In India, the utilization of liver lipids as sources of fish oil and polyunsaturated fatty acids (PUFA) from the puffer fish as a cheap and easily available source. In this study, to understand the general biology of Andaman puffer fishes with special reference on diet preferences and length-weight relationship. Ten species of puffer fishes belonging to two families and five genera including a new genera Chilomycterus reticulates (Linnaeus, 1758) were collected and identified from the coastal waters of Andaman Islands. The length-weight relationship and gut content analysis of nine local puffer fishes, The average length-weight relationship of nine species is depicted namely Arothron reticularis (Bloch & Schneider, 1801) (n=53); Arothron immaculatus (Bloch & Schneider, 1801) (n=55); Arothron hispidus (Linnaeus, 1758) (n=53); Arothron nigropunctatus (Bloch & Schneider, 1801) (n=51); Arothron stellatus (Bloch & Schneider, 1801) (n=50); Chelodon patoca (Hamilton, 1822) (n=35); Diodon hystix (Linnaeus, 1758) (n=50); Diodon liturosus (Shaw 1804) (n= 49) and  Lagocephalus guentheri (Miranda-Riberio, 1915) (n=38) were calculated to be W=0.1599, W=0.1294, W=0.4614, W=0.0081, W=2.9841, W=0.091, W=0.4709 W=0.0982 and W=0.10605. The growth coefficient of these nine species was b>3, which showed positive allometric growth and the fish becomes heavier in relation to its length. Studied species collected from Andaman waters exhibited wide range of variations in body size (5.1-54cm) and weight (9-2247g). Gut content analysis indicated that puffer fishes are omnivorous since fragments of corals, sponges, algae, mollusks, rock oyster and fish are commonly found in their intestines. The general biology investigation reports provide the fundamental information about local puffer fish resources. In future, fully utilize the puffer fish resources from the Andaman Sea, the puffer fish should be a good candidate for mariculture in the near future. Apart from processing their flesh for human consumption, the viscera of puffer fish can be explored to produce the TTX. Due to its specific blocking action towards voltage gated sodium channel that can cease the transmission of action potential, TTX has the potential to develop as a drug lead candidate for local anesthetics or analgesics.

Biography:

Abstract:

The mountainous regions in the Himalayan states of India is endowed with copious amounts of highly oxygenated pristine freshwater highly suitable for culturing rainbow trout, which is a robust and fast growing salmonid fish farmed across the globe. Eventually after its introduction in India in the early 20^th century, rainbow trout is fast becoming the most remunerative coldwater fish that provides livelihood and food security to the hill population. The present annual rainbow trout production in India is nearly 842 tons from 62 government trout farms and 660 private trout production units distributed across the states of Jammu & Kashmir, Himachal Pradesh, Sikkim, Arunachal Pradesh and Uttarakhand. Serial and parallel flow through raceway culture systems is widely used. In terms of seed and feed production capacity, there are 32 government affiliated rainbow trout hatcheries with an estimated production capacity of 13 million eyed ova and 3 well equipped feed mills with an installed capacity of nearly 10 tons per day. Considering the huge gap between the actual and potential trout production, the ICAR-Directorate of Coldwater Fisheries Research is undertaking concerted research and development efforts to expand and intensify rainbow trout production, in partnership with the concerned state fisheries departments. Spatial decision support system has been employed to generate GIS based site suitability maps for trout culture.  To minimize land and water usage in trout culture, water recirculation system has been developed on trial basis. Laying the base for genetic improvement programs, genetic variability in different rainbow trout stocks has been characterized using DNA marker technologies. Moreover, rainbow trout brood banking and triploid production trials have been initiated. Comprehensive disease surveillance is continually undertaken and diagnostic/control methods are being developed. Cost-effective feeds with better feed conversion ratio have been developed and the use of sustainable feed ingredients is being evaluated. Farm operation and activities like fish seed transportation are being scientifically optimized. The concept of cluster farming modules and culture chains are also gradually introduced and promoted by sharing technical knowledge and science base culture technology that facilitate high returns on investment. All these multipronged strategies will stimulate vertical and horizontal expansion of trout production in India which will also help the neighbouring countries in advancing trout farming practices.

Biography:

Dr. Jericardo S. Mondragon is a graduate from Cavite State University, where he received Bachelor of Science in Fisheries. After graduation, he launched his career in Manila, where he began his works in capture fisheries. He continued his graduate studies in the Far Eastern University and completed the Master in Business Administration Major in Management. Later he pursued his postgraduate studies and became Doctor of Fisheries Technology Major in Marine Fisheries Management and Technology from the Iloilo State College of Fisheries, Philippines. He has 35 years of experience in array of services on fisheries related fields. 

Abstract:

The Bureau of Fisheries- National Mariculture Center in cooperation with the Local Government unit (LGU) have established the near shore Mariculture Parks/Zones in the country which aims to promote the Mariculture as a major livelihood of coastal fisherman, job employment opportunities thus, help reduce poverty in coastal areas. Likewise, it is a great avenue to support fish sufficiency program of the government to ensure available and affordable food for all Filipinos and improve the lives of poor fisherfolk.

Marine Fish Cage projects of the BFAR has been distributed to selected fisherfolks where the cage structure and fingerling requirements given by the Bureau and the feed requirements has been loan by the fisherfolk beneficiaries at the Bank (Land Bank of the Philippines or LBP). The 10X10X4 meters marine fish cage designed is adopted in this technology. Stocking density per cage is 15,000 pieces milkfish with 2,000 pieces siganids (Polyculture Method). 600 bags of feed allotted for the four months culture period. Target production is 6,500 kilos with an estimated value of 720,000.00 pesos. The expected net income per fisherfolk families/investors in 1 unit cage after four months culture period is 120,000.00 pesos with an average ROI level of twenty-five (25) to thirty percent. The Bureau of Fisheries and Aquatic Resources (BFAR) and Local Government Unit (LGU) provides technical assistance to all fisherfolk beneficiaries and small private investors to ensure efficient, effective and smooth implementation of the technology.

Furthermore, milkfish fingerling technology is essential for the marine fish cage project since, milkfish fingerlings is the major inputs of marine fish cage. The BFAR-NMC shall promotes fingerling production in brackishwater fishponds, proper handling techniques during transportation and installation of life support system in the transport truck, proper handling techniques at conditioning cage in pond and in marine fish cage holding facility for continuing support in the development of near shore mariculture parks/zones in the country. The technology can help to improve/increase the survival rate of milkfish fingerling production and assurance on the supply of quality milkfish fingerlings for marine fish cage grow-out cages of fisherfolks and private investors.