Asian fisheries science 

About: Asian fisheries science is an academic journal published by Asian Fisheries Society. The journal publishes majorly in the area(s): Shrimp & Oreochromis. It has an ISSN identifier of 0116-6514. It is also open access. Over the lifetime, 1093 publications have been published receiving 10039 citations.

Developing Artemia Enriched Herbal Diet for Producing Quality Larvae in Penaeus monodon, Fabricius

Abstract: Post larvae (PL1– 30) of Penaeus monodon were fed five different herbal medicinal diets namely MD1, MD2, MD3, MD4 and MD5, prepared using Hygrophila spinosa, Withania somnifera, Zingiber officinalis, Solanum trilobatum, Andrographis paniculata, Psoralea corylifolia and cod-liver oil. Artemia franciscana nauplii and pre-adults were enriched with the above five diets and fed to the larvae of P. monodon. Survival, bioenergetics and specific growth rate were studied. To evaluate the quality of post larvae, they were subjected to salinity (0 and 50‰), pH (6 and 10) and formalin stress (80 and 160 ppm) shocks. Post larvae fed the herbal medicine enriched Artemia survived to a maximum of 95% in the MD1 group whereas the unenriched Artemia fed group showed only 89% survival. The unenriched Artemia fed group consumed 103.78±0.93 mg·animal·30 days food whereas the herbal medicinal diets helped to increase the food consumption significantly (P<0.05) and the MD1 enriched groups consumed the maximum (121.68±1.84 mg·animal·30 days) food. A similar pattern was also noticed in absorption, production and metabolism. The average absorption efficiency (86.17%) was not significant (P>0.05). The unenriched Artemia fed post larvae had a conversion efficiency of 17.47±0.21% whereas in the herbal medicinal diets enriched Artemia fed groups, efficiency increased significantly (P<0.05) to a maximum of 20.29± 0.23% in the MD1 fed group. The same pattern was also observed in net production efficiency. Specific growth rate also increased from that of the unenriched group. Among the five different herbal medicinal diets enriched Artemia and unenriched Artemia fed groups, when subjected to stress test, the MD1 group exhibited the highest resistance followed by MD3, MD5, MD4 and MD2 enriched Artemia fed groups. Asian Fisheries Science 15 (2002): 21-32 Asian Fisheries Society, Manila, Philippines

Ecology and Management of Mud Crab Scylla spp.

Abstract: The recent revision of the genus Scylla into four species provides a basis for the develop- ment of a better understanding of their ecology, population biology and the sustainable manage- ment of fisheries, as well as the selection of species for aquaculture. In many cases, previous studies of mud crab fisheries and ecology have reported the occurrence of more than one “type” of mud crab, but data for any one currently known species have rarely been recorded. Consequently, much of the biological and ecological data in the literature must be reviewed. This paper summarizes the current state of knowledge on mud crab ecology in relation to population biology and management, and discusses priorities for future research to support the development of sustainable mud crab aquaculture and fisheries.

In Vitro Antibacterial Activity of Extracts of Selected Marine Algae and Mangroves against Fish Pathogens

Abstract: In vitro screening of organic solvent extracts of three marine algae viz., Gracilaria corticata, Ulva fasciata and Enteromorpha compressa and five mangroves viz., Aegiceras corniculatum, Aegialitis rotundifolia, Aglaia cucullata, Cynometra iripa and Xylocarpus granatum showed species specific activity in inhibiting the growth of six virulent strains of bacteria pathogenic to fish viz., Edwardsiella tarda, Vibrio alginolyticus, Pseudomonas fluorescens, Pseudomonas aeruginosa and Aeromonas hydrophila (2 strains). Three methanol extracts of C. iripa were active against all the six pathogens, whereas A. corniculatum and A. cucullata were active against four of the pathogens. The chromatographic fractionation of active extracts of A. corniculatum, C. iripa and G. corticata resulted in enriched fractions with wide spectrum activity and lowered values of minimum inhibitory concentration.

Seed Production of Mud Crab Scylla serrata Juveniles

Abstract: The authors thank the Australian Centre for International Agricultural Research for providing partial funding for this project (PN 9217).