Feeding strategies in the larval rearing of prawns

In the early life history of extremely fecund • fishes and shellfishes food and feeding is the most important factor. Availability adequate right kind of food in the growing environment is essential for the survival and growth of the larvae. Because of the complex life history of prawns with different larval stages and sub-stages and the process of metamorphosis requires lot of energy, identification of suitable feed and feeding techniques becomes very important in the larval rearing of prawns. In recent years significant achievements have been made in the development suitable diets and evolving feeding strategies in the prawn hatchery techniques worldwide

Crystal structure of 4-(dimethylamino)-pyridinium 4-aminobenzoate dihydrate

Acknowledgements The authors thank SAIF, IIT, Madras for thedata collection.Peer reviewedPublisher PD

Lipid requirements of milkfish {Chanos chanos) fry

Feeding axperiments conducted in the laboratory on the fry of milkfish, Chanos chanos, with purified diets containing graded levels of lipids showed that 6%-lipid level induces the optimum food intake, maximum growth and best utilization of food and protein. Whereas the lipid levels higher than this optimum have led to increased fat deposition in the tissues, the lower levels have caused reduced growth and poor utilization of food and protein. An inverse relationship is observed between the moisture and lipid contents of the experimental fish. The diet containing 6% lipid has provided the fish with 1.09% saturated fatty acids, 1.56% mono-unsaturated acids, and 3.195% of poly-unsaturated fatty acids. The w6/w3 ratio of the diet was 2.43/0.762

Continuous culture of cladoceran, Moina sp. for rearing of postlarval prawns

A low-cost method for large scale culture of the fresh water cladoceran Moina sp. has been evolved. Moina is used in the frozen condition to feed the postlarvae of penaeid prawns reared at the NPCL of CMFRI

AWARENESS AND USER PATTERN OF E-RESOURCES AMONG THE RESEARCH SCHOLARS IN ALAGAPPA UNIVERSITY: A STUDY

The study analyzed the awareness and usage of e-resources among 110 research scholars of Alagappa University. A well-structured questionnaire was used for data collection and MS Excel software was used for analyzing the data. The study revealed that majority of the respondents are female 84(76.4%) and 75(62.8) % of respondents are M.Phil. research scholars and less respondents from Ph.D. scholars. Most of respondents 30(27.2%) used the library fortnightly, 22(20%) of respondents use library daily. Further the study found that 83(75.5%) of using Google Search engine; 17(15.5%) of the respondents use the yahoo. The study identify the 35(31.8%) of the respondents use the e-journals and 22(20 %) of the respondents use the e-thesis for their research & projects and 20(18.1%) of the respondents use online e-books to get information. The study found that 30(27.2%) of respondents using online electronic information resource to Update knowledge and 25(22.7%) of respondents use it study purpose; 44(40%) of respondents used to store and share information in online resource using Google drive, followed by 28(25.4%) respondents using store and share Hard disk & Hard drive and 21(19%) of respondents using Memory card

AWARENESS AND USER PATTERN OF E-RESOURCES AMONG THE RESEARCH SCHOLARS IN ALAGAPPA UNIVERSITY: A STUDY

The study analyzed the awareness and usage of e-resources among 110 research scholars of Alagappa University. A well-structured questionnaire was used for data collection and MS Excel software was used for analyzing the data. The study revealed that majority of the respondents are female 84(76.4%) and 75(62.8) % of respondents are M.Phil. research scholars and less respondents from Ph.D. scholars. Most of respondents 30(27.2%) used the library fortnightly, 22(20%) of respondents use library daily. Further the study found that 83(75.5%) of using Google Search engine; 17(15.5%) of the respondents use the yahoo. The study identify the 35(31.8%) of the respondents use the e-journals and 22(20 %) of the respondents use the e-thesis for their research & projects and 20(18.1%) of the respondents use online e-books to get information. The study found that 30(27.2%) of respondents using online electronic information resource to Update knowledge and 25(22.7%) of respondents use it study purpose; 44(40%) of respondents used to store and share information in online resource using Google drive, followed by 28(25.4%) respondents using store and share Hard disk & Hard drive and 21(19%) of respondents using Memory card

Success in hatchery development of seabass and its potential for commercial cage culture in India

Brackishwater fish farming is considered as one of the potential areas not only as a source for fish production but also ensures the food security, livelihood for coastal community, business opportunity for entrepreneurs and also can earn foreign exchange. Coastal aquaculture has grown tremendously in early 1990s with farming of single species, the tiger shrimp Penaeus monodon. However, the shrimp farming faced severe set back due to outbreak of viral diseases coupled with social and other environmental issues. To overcome these issues, it is important to introduce some of the remedial measures in order to revive the aquaculture industry to achieve the sustainable production and one such measure clearly visible is the diversification of brackishwater aquaculture with fish species. It is evident that crop rotation can also decrease the risk of disease outbreak in the pond system

Electivity and food rations of the fry of milk fish Chanos chanos (Forskal) under laboratory conditions

The fry of milk fish Chanos chanos (Forskal), measuring 11-15 mm (13.5 mm mean length) obtained from the creeks and canals of Puthuvype area in the Vypeen Island have been used to study the electivity and food rations under laboratory conditions using rotifers, copepods, copepodites, copepod nauplii and Artemia nauplii as feed. The observations at 24 hour intervals lasted for 7 days in one set and 14 days in another set of experiments in different containers with 10 %, salinity. The survival rate was 100% during the period of observation

Structural and Functional Characteristics of miRNAs in Five Strategic Millet Species and Their Utility in Drought Tolerance

Millets are the strategic food crops in arid and drought-prone ecologies. Millets, by virtue of nature, are very well-adapted to drought conditions and able to produce sustainable yield.Millets have important nutrients that can help preventmicro-nutrientmalnutrition. As a result of the adverse effect of climate change and widespread malnutrition, millets have attained a strategic position to sustain food and nutritional security. Although millets can adapt well to the drought ecologies where other cereals fail completely, the yield level is very low under stress. There is a tremendous opportunity to increase the genetic potential of millet crops in dry lands when the genetics of the drought-tolerance mechanism is fully explained. MicroRNAs (miRNAs) are the class of small RNAs that control trait expression. They are part of the gene regulation but little studied in millets. In the present study, novel miRNAs and gene targets were identified from the genomic resources of pearl millet, sorghum, foxtail millet, finger millet, and proso millet through in silico approaches. A total of 1,002 miRNAs from 280 families regulating 23,158 targets were identified using different filtration criteria in five millet species. The unique as well as conserved structural features and functional characteristics of miRNA across millets were explained. About 84miRNAs were conserved acrossmillets in different species combinations, which explained the evolutionary relationship of the millets. Further, 215 miRNAs controlling 155 unique major drought-responsive genes, transcription factors, and protein families revealed the genetics of drought tolerance that are accumulated in the millet genomes. The miRNAs regulating the drought stress through specific targets or multiple targets showed through a network analysis. The identified genes regulated by miRNA genes could be useful in developing functional markers and used for yield improvement under drought in millets as well as in other crops

Genetic parameters for early growth traits in Lates calcarifer (Bloch)

Genetic parameters for early growth traits such as body length at 21st, 50th and 80th day and bodv weight at 50th and 80th day were estimated using the data from a sample of 497 progeny s or pair matings in Lates calcarifer. The progeny were produced by the induction of spawning using reproductive hormone LHRH-a. The heritability (hz), genetic and phenotypic correlations were estimated using single pair matings model of analysis of variance and covariance. The efficient of variation ranged from 21.57 to 37.95 for body length and 64.98 to 89.41 for body weight. The hZ estimates ranged from 0.15 to 0.96 and 0.50 to 0.77 for body length and body weight respectively. The pooled data estimates of h2 are higher than the single environment data estimates and the h2 increased along with the age. The genetic and phenotypic correlations between body length and weight were found to be high, positive and significant in 50 day and 80 day old fingerlings of L. calcarifer