Showing papers in "Aquatic Living Resources in 1998"

TL;DR: The amino acid compositions of whole body tissue of European seabass, gilthead seabream and turbot of two different size classes were determined and no significant differences were detected between species.

TL;DR: A stand-alone multimedia program was written to facilitate computation of series of bioenergetic models developed based on principles of nutritional energetics to determine feeding standards, waste outputs and effluent water quality based on a biological method.

TL;DR: In this paper, the effect of feeding level and water temperature on growth and feed efficiency, nutrient and energy utilization and waste outputs of rainbow trout was investigated. But the results were limited to a single group of fish reared at 6, 9, 12 and 15 °C.

TL;DR: In this article, a model to estimate the waste production from sea cage culture was established using known feed inputs of nitrogen, phosphorus and organic matter, the model quantifies waste discharge from seabream culture.

TL;DR: An attempt is made here to check the theoretical assumptions and technical considerations behind the bioenergetic principles developed for rainbow trout with other freshwater or marine species.

TL;DR: High energy extruded diets were formulated to contain the same level of protein supplied either by soy protein concentrate (SPC) or fish meal to measure voluntary feed intake and feed waste, faecal losses and soluble losses of nitrogen and phosphorus in rainbow trout.

TL;DR: In this article, a trial was carried out to compare the growth performance, body composition and apparent digestibility coefficients (ADC) of diets by seabass, with an initial weight of 13.5 g, fed diets including fish meal or soybean meal as the main protein sources.

TL;DR: Dietary bulk incorporation reduced feed efficiency values, particularly at the 20 % incorporation level, but this reduction was mostly caused by the dietary nutrient dilution of the bulk-incorporated diets, rather than by a negative effect of the Bulk agents as dietary ingredients.

TL;DR: A sperm cryopreservation protocol adapted from turbot, was tested on sea bass using either 250-μL straws or 1.5-mL cryovials, with a decline in fertility explained by the loss of fertility of only one sperm, and only in large-volume conditions, probably due to the delay of use after thawing.

TL;DR: The data suggest that deficiency in n-3 fatty acids might be associated with impaired development of walleye, and thus poor larval and juvenile viability.

TL;DR: In this paper, the main species of the French demersal fishery off the west coast of Scotland and in the Celtic Sea were calculated using different methods to define the trips used to calculate fishing effort and associated landings.

TL;DR: The ADC of dry matter were consistently lower than those of energy, but there was a significant positive correlation between them and there were no significant differences in the ADC of protein and energy of each feedstuff at the two inclusion levels.

TL;DR: In this article, a study on nitrogenous and phosphorous waste production in European seabass (Dicentrarchus labrax) was carried out in a flow-through land-based farm.

TL;DR: In this article, a longline "metier" using small hooks for red sea breams (Pagellus acarne and Pagellus erythrinus) in the Algarve (south of Portugal) was studied.

TL;DR: It can be concluded that foam fractionation coupled with aeration and water circulation is a good way to treat and recirculate wastewaters in extensive systems, but that a multiple treatment combining a retention pond, foam fractionations and microalgae-bivalve filtration, is the best solution to treat all these forms of wastes from intensive systems.

TL;DR: In this article, a new method which couples the STATIS multitable approach with the logic of correspondence analysis (CoA) is proposed to study the stability of spatial organization of demersal assemblages in terms of species composition.

TL;DR: In this article, the authors describe both an experimental and a commercial-scale system for sludge dewatering and stabilisation, where back-wash water from rotating disk microsieves was settled in a conical sedimentation tank.

TL;DR: The results confirm the high quality of the turbot spermatozoa stemmed from the cryopreservation process, allowing their use for routine aquaculture practices.

TL;DR: The relationships observed observed parallel patterns detected in natural lakes to a certain extent, despite the critical human influence and the probable instability of some of the patterns detected.

TL;DR: In this article, the effects of improved diet on growth rates, survivorship and reproductive activities of the colonial urochordate Botryllus schlosseri, an important model species in a variety of scientific disciplines, were studied.

TL;DR: In the hypoxic water of tropical swamps, the main function of the floating bubble nest appears to be to provide oxygen to the developing eggs by lifting the eggs above the water surface while protecting them from desiccation.

TL;DR: An experimental small scale partial recirculating system for rainbow trout was assembled and the anaerobic digester was able to significantly reduce VS and SS content of wastewater and the zeolite ion-exchange column significantly improved water quality of effluent produced by the digester.

TL;DR: Molecular and morphometric data reported here give more evidence to support the view of other authors that the Chilean blue mussel should be included as M. edulis subspecies: Mytilus eduis chilensis.

TL;DR: In this paper, a split-beam hydroacoustic system with automatic tracking of individual fish is used to estimate the number of upstream migrating adult Pacific salmon in the Fraser River in British Columbia, Canada.

TL;DR: Pacific oysters acclimated to Isochrysis sp.

TL;DR: The involvement of astaxanthin in P. monodon reproduction and its need for inclusion in broodstock diets is suggested and Supplementation of vitamin A to broodstock diet of P.monodon appears to enhance its ovarian development and spawning.

TL;DR: Using gonadal biopsy of marked fish, the authors identified sex and monitored ovarian development in one cohort of cultured Siberian sturgeon over the age interval 8.5-12.5 year.

TL;DR: It is suggested that nighttime feeding in intensive catfish culture could be replaced by 24-h feeding under conditions of permanent darkness, because the growth of vundu was density-dependent, being impaired at low stocking density, but this was substantially mitigated under nighttime feeding.

TL;DR: Self-feeding systems allow fish to freely express feeding activity and cylindrical screens markedly reduced feed wastage and seabass were able to locate and activate the trigger (even in total darkness) to obtain a reward.