Showing papers in "Aquaculture in 2001"

TL;DR: The use of plant-derived materials such as legume seeds, different types of oilseed cake, leaf meals, leaf protein concentrates, and root tuber meals as fish feed ingredients is limited by the presence of a wide variety of antinutritional substances.

TL;DR: An improvement in broodstock nutrition and feeding has been shown to greatly improve not only egg and sperm quality but also seed production, and protein component of cuttlefish and squid together with their optimal concentration of HUFA appear to be responsible for their positive effect on reproductive performance.

TL;DR: It is proposed that maternal systems have been developed to buffer eggs from deleterious consequences of stressors, including regulation of transfer of substances of maternal origin to the egg and in mechanisms controlling the timing of reproduction.

TL;DR: Based on the recent discovery of GnRH multiplicity in fish and the increasing understanding of its functional significance, new GnRH agonists can be designed for more potent, affordable and physiologically-compatible spawning induction therapies.

TL;DR: This review concentrates on the use of oestrogens for sex control, discussing the advantages of producing monosex female stocks for finfish aquaculture, and pointing out those cases in which hormonal sex reversal technology is worth applying.

TL;DR: Larvae have the ability to digest and thrive on compound diet, if this diet is well adapted, and could totally replace live prey.

TL;DR: The results suggest that inclusion of bombesin may increase assimilation of diets and larval growth, however, other trials with juvenile fish have shown no effect of these additions of the neuropeptide.

TL;DR: Since no artificial feed formulation is yet available to completely substitute for Artemia, feeding live prey to young fish larvae still remains essential in commercial hatchery operations.

TL;DR: There is a need for better microbial control during intensive larval production of marine larvae in intensive systems, and the use of probiotics has proven advantageous in domestic animal production, and microbial management may also have a potential in aquaculture.

TL;DR: It was concluded that the tested strain of L. rhamnosus may be a promising probiotic for fish without subsequent risk for human consumption.

TL;DR: The results suggest that dietary AA fed prior to handling stress improved survival more effectively than when fed following handling stress, and imply the importance of early larval nutrition on later larval and juvenile survival during crowding, grading and other handling stressors.

TL;DR: Although high dietary lipid levels affected growth and whole body composition of turbot adversely they induced very few alterations in flesh quality.

TL;DR: Results of this trial indicate that brewers yeast can replace 50% of fishmeal protein with no negative effects in fish performance and the inclusion of up to 30% brewers yeast in the diet improved feed efficiency.

TL;DR: It is concluded that growth and food conversion efficiency of juvenile turbot can be improved by rearing them at intermediate salinities in the upper temperature range.

TL;DR: The YY/GMT technology in the Nile tilapia is considered, which is the only example of a genetic technology for the production of monosex males so far widely adopted by the aquaculture industry, and the considerable benefits accruing from the use of GMT are described.

TL;DR: The HP-SBM diet induced enteritis in the distal intestine of the salmon and the apparent digestibilities of nitrogen, lipid and energy were lower in the HP- SBM treatments than in all other treatments, and no effects of dietary soy were detected on final body composition.

TL;DR: Multiple antimicrobial resistance and intermediate reaction to at least one antimicrobial are associated with antimicrobial use.

TL;DR: When added to normal fish feed formulations at a combined inclusion level of 0.03%, these additional nucleotides were shown to increase resistance to challenge infections with bacterial, viral and rickettsial diseases as well as ectoparasitic infestation.

TL;DR: During December and May, as a result probably of temperature elevation and the intense reproductive activity that follows early summer and autumn (May), the observed increase in oxygen consumption is likely to have elicited an increase in cellular oxyradical generation.

TL;DR: Results highlighted a quality gap between wild-caught and hatchery-reared specimens, with the only exception being sea bream larvae that were reared in semi-intensive conditions.

TL;DR: Recent advances in research, development and application of chromosome manipulation techniques in Japan are introduced and repeated meiotic (polar body) gynogenesis may be more practical than cloning from homozygous gynogens as a method to generate isogenic lines.

TL;DR: This paper reviews the recent advances in finfish and shellfish gamete and embryo cryopreservation and suggests ways to overcome the problems posed by finfish ova and embryos using very recent technical innovations.

TL;DR: F 3 –F 8 hybrids were proved to be allotetraploids with two chromosome sets of red crucian carp and two chromosomes sets of common carp and it was concluded that the females and males of F 2 hybrids were able to produce diploid eggs and diploids spermatozoa and they fertilized to form tetraploid fish.

TL;DR: In a small-scale laboratory study, the effectiveness of a three-stage effluent treatment system was investigated and filtration by the Sydney rock oyster further reduced the concentration of suspended particulates, including inorganic particles, phytoplankton, bacteria, and their associated nutrients.

TL;DR: This paper reviews the current knowledge on shrimp broodstock nutrition with special reference to developments during the last decade and an overview of the efforts to reveal the nature of maturation-stimulating factors in fresh food, and of the use and performance of commercial and experimental artificial diets.

TL;DR: Although disinfection of rotifers remains a bottleneck, it has been observed that rotifer populations cultured at high densities are not prone to higher bacterial infestation and the problem of unexplained mortalities in batch cultures seems to be partly solved by the introduction of recirculation systems or by bacterial management, which allow more reliable rotifer production.

TL;DR: Developments and advanced techniques of finfish larviculture in Taiwan are discussed, including utilization of the green water technique in rearing larvae and of ozone-disinfected recirculating water in weaning larvae.

TL;DR: The results indicate that the live-chilling method can prevent some of the negative effects on fillet quality caused by crowding stress, and is associated with DFD-meat, being characterized by high ultimate pH due to low initial glycogen.

TL;DR: In this article, the effects on vaccine efficacy, vaccination and salt water transfer stress, growth performance and intestinal morphology of the inclusion in salmon diets of supplemental nucleotides were investigated.