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Acclimation and Propagation of the Abalone Haliotis tuberculata in a Land-Based Culture System in Israel (1996)

Shpigel, M. ; Marshall, A. ; Lupatsch, I. ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of the World Aquaculture Society 27 (1996), S. 0

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ISSN: 1749-7345

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Abstract.— The European abalone Haliotis tuberculata, a valuable macroalgivore, was introduced and acclimated for culture in a land-based facility at Eilat, Israel, on the Red Sea (Gulf of Aqaba). Large quantities of high-protein seaweed (Ulva lactuca) are produced there in biofilters used in fish mariculture. Although high water temperatures (25–27 C) inhibited summer growth, and in spite of the high salinity (41 ± 1 ppt). four groups of abalone of different sizes grew more in 1 yr than reported in their natural habitat. This fast growth is attributed to the long period (8 mo, from fall to spring) in which temperatures in Eilat waters are within the optimal range for this species, and to the high protein content of the seaweed. Winter timing of maximal growth as well as reproduction in Eilat was reversed compared with Europe, where they occur in summer. Gametogenesis began in December, and the gonads in most broodstock were spent by May. Haliotis tuberculata appears to have excellent potential for intensive mariculture in Israel.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1749-7345.1996.tb00627.x

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Dietary substitution of soy and rapeseed protein concentrates for fish meal, and their effects on growth and nutrient utilization in gilthead seabream Sparus aurata L. (2000)

Kissil, G Wm ; Lupatsch, I ; Higgs, D A ; [et al.]

Oxford, UK : Blackwell Science Ltd

Aquaculture research 31 (2000), S. 0

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ISSN: 1365-2109

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Soy and rapeseed protein concentrates (SPC and RPC) were evaluated as fish meal substitutes in gilthead seabream Sparus aurata L. diets. The protein concentrates were used to replace 30%, 60% and 100% fish meal, and effects on feed intake, weight gain and feed gain ratio were determined in a 56-day growth trial. Some groups were then grown beyond 56 days, until all reached an average weight of 50 g. A comparison of body composition at 50 g showed no significant differences in protein and ash content among all fish, while lipid and energy contents were different. The 100% RPC and 60% and 100% SPC replacement diets had lower body lipid and energy contents compared with those of the control diet. Feed intake and weight gains were inversely related to inclusion levels of plant proteins. Feed intake dropped to 52–72% of that of the control treatment and weight gain to 46–61%. Energy retention followed this same trend, decreasing from ERV values of 53 to 44 with an increase in dietary plant protein content. With the exception of 100% SPC substitution (PPV = 35), protein retention among treatments was similar (PPV = 37–39). These results suggest that both SPC and RPC may be promising protein sources for inclusion in seabream diets. The relative palatability of these plant proteins could be a limiting factor in their use.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1365-2109.2000.00477.x

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Energy and protein requirements for maintenance and growth in gilthead seabream (Sparus aurata L.) (1998)

Lupatsch, I. ; Kissil, G. Wm. ; Sklan, D. ; [et al.]

Oxford BSL : Blackwell Science Ltd

Aquaculture nutrition 4 (1998), S. 0

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ISSN: 1365-2095

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Factorial determinations of energy and protein requirements in growing Sparus aurata were carried out at 23–24°C. The energy content in the whole fish was dependent on fish weight and ranged from 5 to 11 MJ kg−1 body mass for 1–250 g fish, whereas the protein content remained constant at 179 g kg−1.During starvation the fish lost 42.5 kJ body weight (BW) (kg)−0.83 day−1 and 0.42 g protein BW (kg)−0.70 day−1. The maintenance requirement for energy was calculated to be 55.8 kJ BW (kg)−0.83 day−1 and for protein 0.86 g BW (kg)−0.70 day−1. Utilization of digestible energy and digestible crude protein below and at maintenance was determined as 0.72 and 0.51, respectively. Utilization of digestible energy and digestible crude protein for growth above maintenance was determined as 0.46 and 0.28, respectively.These values allow estimation of requirements for growing Sparus aurata.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1365-2095.1998.00065.x

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Apparent digestibility coefficients of feed ingredients and their predictability in compound diets for gilthead seabream, Sparus aurata L. (1997)

Lupatsch, I. ; Kissil, G. Wm. ; Sklan, D. ; [et al.]

Oxford, UK : Blackwell Science Ltd

Aquaculture nutrition 3 (1997), S. 0

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ISSN: 1365-2095

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Apparent digestibility of crude protein, amino acids, lipid, carbohydrate and energy was measured for a range of feed ingredients fed to gilthead seabream, Sparus aurata L. — fish meal, poultry meal, meat meal, blood meal, squid meal, extracted soyabean and wheat flour. Chromic oxide was used as a non-absorbed reference substance and faeces were collected by stripping. Diets compounded from mixtures of these ingredients were then used to examine the possibility of predicting the digestibility of formulated diets.Apparent digestibility of crude protein ranged from 79% to 90%, lipids from 83% to 95% and energy from 72% to 88% in the different ingredients. Apparent digestibility of carbohydrates was lower and ranged from 49% to 77%. Apparent digestibility of amino acids was higher than that of crude protein and differences were found among digestibilities of individual amino acids.Tests conducted using five compound diets indicated that ingredient digestibility was additive for protein, amino acids, lipids and energy, whereas the digestibility of carbohydrates in the compound feeds was slightly lower than predicted.Diets for Sparus aurata may thus be formulated on the basis of digestibility of individual ingredients.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1046/j.1365-2095.1997.00076.x

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