Aquaculture International 

About: Aquaculture International is an academic journal published by Springer Science+Business Media. The journal publishes majorly in the area(s): Biology & Aquaculture. It has an ISSN identifier of 0967-6120. Over the lifetime, 2636 publications have been published receiving 50483 citations. The journal is also known as: Aquaculture international (Print) & Aquaculture international (Cham. Online).

National Research Council (NRC): Nutrient requirements of fish and shrimp

Abstract: The previous NRC handbooks covering the nutritional requirements of aquatic animals rapidly achieved the status of standard works of reference, and the same is likely to be the case for Nutrient Requirements of Fish and Shrimp. This new book, which updates and expands upon information given in the 1993 edition, has been put together by a committee of ten well-known aquatic animal nutritionists. Given the length of time that has elapsed since publication of the previous edition, this book is long overdue. The book summarizes current knowledge about nutritional requirements of fish and shrimp (some readers will be more familiar with several species under the name prawns, and some information is also given for other crustaceans). In addition, it provides information about the basic concepts of nutritional research, gives guidelines relating to the design of practical nutritional studies, and introduces some of the basic methods used in such studies. Not surprisingly, given the amount of nutritional information available for the aquatic animal groups considered in this publication, there is greater coverage of finfish than of the shrimps (prawns). Major finfish groups considered are warm-water omnivores (carps, tilapias and catfishes), cold-water carnivores (salmonids) and warm-water marine species, such as sea-basses and sea breams. Among the crustaceans, most of the information given relates to marine penaeids, although there is also some mention of the feeding and nutrition of lobsters, crabs, crayfish, and the giant river prawn, Macrobrachium rosenbergii. The book is made up of a Summary and Introduction, 15 main chapters, an overview of future research needs, a series of summary tables, lists of species names, abbreviations and acronyms, appendices, and an index. The first main chapter introduces basic concepts and methodology and there then follow general overviews of feeding, digestion, and metabolism, before there is a move to considerations of the macronutrients and micronutrients. Feed additives and anti-nutritional factors are also covered, as are methods used to assess nutrient bioavailability, and there are also chapters that cover feeding practices and feed management, and larval nutrition. The closing chapters cover feed ingredients, their processing, and the production of formulated feeds for aquatic species.

Herbal biomedicines: a new opportunity for aquaculture industry

Abstract: Hormones, antibiotics, vitamins and several other chemicals have been tested in aquaculture operations for various remedies Even though they give positive effects, they cannot be recommended due to their residual and other side effects The alternative herbal bio-medicinal products in the aquacultural operations, that have the characteristics of growth promoting ability and tonic to improve the immune system, act as appetite stimulators They increase consumption, induce maturation, and have antimicrobial capability and also antistress characteristics that will be of immense use in the culture of shrimps and other fin fishes without any environmental and hazardous problems Herbal compounds such as phenolics, polyphenols, alkaloids, quinones, terpenoids, lectines and polypeptides have been shown to be very effective alternatives to antibiotics and other synthetic compounds The present paper is presented after a careful review of more than 50 herbal plants for their biological effects such as growth promotion, immunostimulation, antistress, antibacterial, antifungal, antivirals, appetite stimulators and aphrodisiac

Fatty acid composition of 12 microalgae for possible use in aquaculture feed

Abstract: Twelve algal strains representing the classes Cyanophyceae, Prymnesiophyceae, Bacillariophyceae, Rhodophyceae, Cryptophyceae, Chlorophyceae, Xantophyceae and Eustigmatophyceae were selected mainly from the culture collection of the Norwegian Institute for Water Research (NIVA). The algae were grown as continuous cultures in a 1.8 l. reactor, internally illuminated with an 11 W fluorescent tube. The retention time was adjusted in the range 2–4 days to fit the growth rate of the algae. The growth responses and fatty acid composition were analysed. The maximum production rate was obtained with Pseudokirchneriella subcapitata (0.63 g 1−1 day−1) and the lowest with Porphyridium cruentum 0.13 g 1−1 day−1. Arachidonic acid (AA) and eicosapentaenoic acid (EPA) were the dominating polyunsaturated fatty acids (PUFAs) in P. cruentum, while only EPA accumulated in Phaeodactylum tricornutum. Docosahexaenoic acid (DHA) was the major PUFA in Isochrysis galbana, while Pavlova sp. had both EPA and DHA. This is the first report on the fatty acid profiles of Nannochloropsis oceanica, Chroococcus sp., Synechococcus sp. and Tribonema sp.

Enzyme producing bacterial flora isolated from fish digestive tracts

Abstract: Isolationand enumeration of aerobic bacterial flora in the gastrointestinal tract of nineculturable freshwater teleosts, namely catla, rohu, mrigal, silver carp, grasscarp, common carp, tilapia, walking catfish and murrel have been carried outAmylolytic, cellulolytic, lipolytic and proteolytic microflora were identifiedfrom the culture plate using selective media The isolates were qualitativelyscreened on the basis of their extracellular enzyme producing ability Theselected strains were further quantitatively assayed for amylase, cellulase,lipase and protease activities Protease activity was exhibited by almost allthe bacterial isolates, while strains isolated from tilapia, grass carp andcommon carp showed considerable amylolytic and cellulolytic activities Maximumactivity of lipase was exhibited by a strain isolated from silver carp Thestudy indicates that there is a distinct microbial source of the digestiveenzymes – amylase, cellulase, lipase and protease, apart from endogenoussources in fish gut The information generated from the present investigationmight contribute towards better feed formulations for carp at low cost,incorporating the enzyme producing bacterial isolates as probiotics

Effect of a mannan oligosaccharide on the growth performance and immune status of rainbow trout (Oncorhynchus mykiss)

Abstract: The objective of these experimental trials was to determine the effect of a mannan oligosaccharide (MOS) derived from the outer cell wall of Saccharomyces cerevisiae strain 1026 on the growth performance and immune status of rainbow trout. Two experiments were conducted, one with eight net cages and the other with eight raceways. The net cage experiment (42 days) involved 14,400 fish with an initial average weight of 30 g. The raceway experiment (90 days) was conduced with 40,000 fish with an initial average weight of 101 g. Both experiments compared a commercial extruded diet with and without 2,000 ppm MOS supplementation. The calculated daily feed was supplied in six equal rations. Body weight, feed intake, and mortality were recorded and samples were taken for analysis of indicators of immune status. All data were subjected to ANOVA, with a net cage or raceway regarded as an experimental unit. Significantly improved performance and immune status were observed in the net cage trial—improved weight gain of 13.7% (P < 0.01), reduced feed conversion ratio (FCR) (P < 0.05), reduced mortality (P < 0.01), and improved indicators of immune status (P < 0.01) for fish fed the MOS supplement compared with controls. Similar significantly improved performance was observed for the MOS-treated groups in the raceway trial—9.97% improved weight gain (P < 0.01), lower FCR (P < 0.01), and reduced mortality compared with the control treatment. In the raceway trials, however, only the indicators of immune status lysozyme concentration, APCA, and CPCA were significantly improved by MOS treatment (P < 0.05). These experimental trials demonstrated the ability of MOS to improve the growth performance, survival, and immune status of rainbow trout produced in net cages or raceways.