Showing papers in "Aquaculture in 1997"

TL;DR: This work has studied the biochemical composition of about 40 species of microalgae from seven algal classes to define those that may be best adapted to the Australian conditions.

TL;DR: Investigations in fish are comparatively complicated as both dietary intake and waterborne mineral uptake have to be considered in determining the mineral budgets.

TL;DR: Progress in this field requires definition of the optimal dietary ratio of 22:6:20:5; the significance of phospholipid vs. neutral lipid in larval diets, and larval requirements for antioxidant vitamins.

TL;DR: In this article, the importance of lipids at different early stages of marine fish larvae was reviewed and the effect of long-term and short-term enrichment techniques on the lipid composition of rotifers has been documented using various marine oils/emulsions.

TL;DR: Analysis of the complex food webs in ponds, combined with measurements of primary productivity, C cycling through bacteria, Zooplankton and meiofaunal biomass changes and nitrogen cycling will provide the basic data for generating a model to describe and predict fish productivity in ponds.

TL;DR: The ratio of total n-3 to n-6 fatty acids is much lower for freshwater fish than for marine fish, but keeping freshwater fish on diets containing high amounts of fish oil results in marketable fish with substantial levels of n- 3 PUFA.

TL;DR: Dietary phospholipid supplementation has potential importance for the formulation of practical larval diets and may improve the performance of the diet by improving the water stability of food particles, or by their action as antioxidant or feed attractant.

TL;DR: In this article, the growth and survival of Penaeus vannamei postlarvae were measured at temperatures of 20, 25, 30 and 35 °C and salinities of 20.

TL;DR: Integrated marine cultivation of Gracilaria chilensis (Gracilariales, Rhodophyta) and salmon cages for reduced environmental impact and increased economic output is discussed in this article.

TL;DR: Young stages of marine fish larvae ingested microalgae, but the algal cells were assimilated to a different extent in halibut and turbot, and the algae in larval tanks most probably modified the bacterial flora of the water and the rotifers.

TL;DR: Results indicate that given an adaptation period, trout previously adapted to fish meal diets consume and grow well on diets containing high levels of soybean meal.

TL;DR: It is indicated that selenium allowance in diets of channel catfish can be reduced when selenomethionine or selenoyeast replaces inorganic selenarium.

TL;DR: The results of the present study show that feeding of glucan in low doses several weeks before transportation can help to prevent negative effects of stress.

TL;DR: A negative correlation between dietary ash content and protein digestibility was observed and higher amounts of nitrogen were excreted as levels of CGM and MBM increased in the diets, being significantly higher in the case of 40% substitution either with CGM or MBM protein.

TL;DR: It was possible to cultivate harpacticoid copepods in shallow trays or in continuous bioreactors with large area substratum and the use of ammonia excretion as a means for controlling feeding of the copepod was investigated.

TL;DR: FFSM may partly replace FM in diets for salmonids without compromising the sensory quality and no significant effects of dietary protein source on the amount of astaxanthin in the muscle, visual color score, proximate composition, fat deposition or sensory characteristics were observed.

TL;DR: In an effort to improve egg quality and larval viability, efforts should be directed towards establishing the best ratio of DHA/EPA/AA in formulated feeds such that requirements for neural function and visual performance are maximised and that production and efficacy of eicosanoids are adequate to permit physiological functions to operate efficiently.

TL;DR: Normal osteological development of the caudal fin in gilthead sea bream is described at the larval and juvenile stages and abnormalities were extra-numerous elements, fusions, deformities and displacements of the elements.

TL;DR: Under optimal hatchery rearing conditions, differences in initial egg lipid reserves may not necessarily affect subsequent larval growth and survival, and the importance of lipid and PUFA reserves, in particular eicosapentaenoic acid on 20:5(n−3), during the development of embryos and larvae can, however, be clearly demonstrated under more stressfulRearing conditions.

TL;DR: Rainbow trout fed suboptimal phosphorus diets had significantly lower plasma phosphorus concentrations and alkaline phosphatase activity, and significantly higher whole body lipid than those fed adequate phosphorus diets.

TL;DR: The inflexion points of the growth curves show that after early acceleration, growth becomes more isometrical, and can symmorphosis, due to strong interdependency between feeding and swimming be found?

TL;DR: Dietary DHA and soybean lecithin were effective in increasing the tolerance of red sea bream and marbled sole to the various stress conditions.

TL;DR: This paper reviews the literature on abnormal embryonic development in fish, and presents new findings on the significance of blastomere morphology in the Atlantic halibut, Hippoglossus hippoglossUS, to investigate more closely the relationship between blastomeres morphology and fish egg survival.

TL;DR: A continuous cell line, derived from gill tissue of the flounder Paralichthys olivaceus and propagated for 96 passages over 3 years, grew well in the temperature range of 20–25 °C, but had a reduced growth rate at 30 °C and did not grow at 35 °C.

TL;DR: In this paper, a co-feeding trial was conducted in a number of commercially important species, including seabass, gilthead seabream, turbot, and Atlantic halibut, under practical hatchery conditions.

TL;DR: The effect of exogenous enzymes on digestion and assimilation in gilthead seabream larvae was demonstrated when pancreatin supplementation to a MD enhanced its assimilation by 30% and significantly improved growth while seabass larvae were unaffected by a similar pancreatin supplements suggesting species-specific proteolytic ability during larval development.

TL;DR: The results prove that these explanations are insufficient and that similar deformations may occur frequently in fry with functional swimbladder during the early weaning phase, if currents in tanks are higher than 10 cm s −1 .

TL;DR: It is hypothesised that immunostimulation, together with other methods of achieving microbial control, will help to reduce the probability of microbial problems in larviculture, resulting in the production of high-quality juveniles for the on-growth period.

TL;DR: A selectivity in metabolism of the different stereoisomers of astaxanthin, either during absorption, transport or deposition, or their combinations, is suggested and suggests that substantial isomerization of astxanthin Z-isomers occurs in the liver.

TL;DR: Chromium supplementation improves glucose utilization by tilapia, and Cr2O3 supplementation was more effective than other chromium forms.