Rearing of coregonid (Coregonus schinzi palea cuv. et val.) larvae using dry and live food I. Preliminary data

Dąbrowski, Konrad; Charlon, Nicole; Bergot, Pierre; Kaushik, Sadasivam

doi:10.1016/0044-8486(84)90385-5

Cited by 42 publications

(14 citation statements)

References 11 publications

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“…While in strain 2 a strong effect had been seen, in strain 1 it was hardly observed. If disease outbreak was associated with the cold‐water conditions remains unclear as these also appears at higher water temperatures (Dabrowski & Poczyczynski, ; Dabrowski et al., ; Luczynski et al., ). As a next logical step, an experiment with a special cold‐water line of an agglomerated commercial microdiet should be performed with larval whitefish.…”

Section: Discussionmentioning

confidence: 99%

Suitability of two agglomerated commercial microdiets for rearing larvae of different strains of Coregonus lavaretus under cold-water conditions

Esmaeilzadeh‐Leithner

Wanzenböck

2017

Aquacult Nutr

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The suitability of two agglomerated commercial microdiets ("Gemma micro ® " and "O.range ® " from now on called diet A and diet B) as a starter feed was tested on larvae of European whitefish (Coregonus lavaretus). Two strains (Baltic and Alpine) were tested in a 60-day experiment under ambient cold-water conditions (average 7.6 ± 1.9°C). The experiment was carried out in 400-L PVC tanks with a stocking density of 5,000 larvae per tank. Samples were removed weekly to determine growth, survival and feed acceptance, in addition to water quality. Striking differences between the feeds and different strains were observed. For one diet, growth and survival were distinctively higher in strain 1 compared to strain 2, where it was invariably low with both diets. For the second diet, growth and survival in strain 1 were also low and similar to strain 2. Feed acceptance in strain 1 was found higher compared to strain 2.Final weights were significantly different with strain 1 being heavier; however, in terms of relative growth rate, no differences between strains were found. Strong differences in the performance in terms of growth, survival and feed acceptance of different strains of European whitefish became apparent. Furthermore, the rearing of larvae exclusively on standard agglomerated commercial microdiets under cold-water conditions is possible, but not every microdiet is suitable. K E Y W O R D SEuropean whitefish, feed acceptance, growth, Survival

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Section: Discussionmentioning

confidence: 99%

Suitability of two agglomerated commercial microdiets for rearing larvae of different strains of Coregonus lavaretus under cold-water conditions

Esmaeilzadeh‐Leithner

Wanzenböck

2017

Aquacult Nutr

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“…If disease outbreak after six, respectively seven weeks was facilitated by cold-water conditions remains unclear, as disease outbreaks have been reported under higher temperatures as well (Dabrowski et al, 1984;Lucynski et al, 1986;Dabrowski & Poczyczynski, 1988). But it is noticeable that disease outbreak was recognized in those studies exclusively at higher water temperatures (> 8 °C).…”

Section: Water Conditionsmentioning

confidence: 93%

“…As we know from previous studies, food particle must be in an adequate physical structure so that they are readily digestible for whitefish larvae and nutritious enough to provide sufficient energy for growth (Holt et al, 2011;Langdon & Barrow, 2011). Food acceptance is strongly influenced by the aroma of the food (Appelbaum, 1980;Dabrowski et al, 1984) and therefore "AgloNorse®" as well as "AgloNorse® Extra" are suspected to allow the larvae to smell the food particles and to identify them as a tempting meal (Kolkovski et al, 1997;Yúfera et al, 2002). Because the exact composition of the tested feed is a company secret, no detailed information can be given due to the missing data.…”

Section: Agglomerated Microdiets Compared To Previous Onesmentioning

confidence: 99%

Rearing Larvae of Different Strains of Coregonus lavaretus under Cold Water Conditions: Comparison of a Special Cold-Water Line with a Standard Agglomerated Microdiet

Leithner¹,

Wanzenböck²

2015

JAS

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We studied the performance of a commercial, agglomerated larval microdiet in terms of survival, growth and feed acceptance and compared a dedicated "cold water line" of the product to the standard product involving a Baltic and an Alpine strain of whitefish. Experiments were conducted under cold water conditions < 8 °C (average 5.1 °C) for 60 days after hatching. Replicate tanks of 400 and 200 liter volume received filtered lake water disinfected with ozone and UV light and were stocked with 15 larvae per liter. Daily rations of 4% body weight were manually delivered in six portions every two hours and group samples were taken weekly to determine length, weight and feed acceptance. Dead larvae were removed and counted daily. Before our experiment was influenced by an outbreak of an unknown disease during the last two weeks, we observed similar growth, survival and feed acceptance for each of the feed types with low variability within each of the two strains. Strains showed characteristic differences in growth and survival related to lower feed acceptance during the first four weeks of the Alpine strain. We concluded that the specific cold water line of the commercial microdiet did not provide any advantage compared to the standard product under low temperature conditions. However, differential performance might exist under different temperature regimes.

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“…They were transported to the laboratory in Saint-Pee-sur-Nivelle in early February and transferred to water at a temperature of 13°C. Fish were reared on dry diet as described by Dabrowski et al (1984b). The first experiment was performedd in March 15, when the fish had reached 20 mg (average individual weight), and trials were continued until June 25, when reached 0.78 g (4 cm total length).…”

Section: Source and Maintenance Offishmentioning

confidence: 99%

Active metabolism in larval and juvenile fish: ontogenetic changes, effect of water temperature and fasting

Dąbrowski¹

1986

Fish Physiol Biochem

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Oxygen consumption, ammonia excretion and fish swimming speed were measured in fish induced to swim by optomotor reaction in a circular metabolism chamber. The relationship between the swimming speed and fish metabolism described by exponential equations allowed the extrapolation to the standard metabolism, i.e. at zero swimming speed. The partitioning of the catabolised protein in the energy supply was estimated based on AQ (volume of ammonia/ volume of oxygen) values. Weight specific standard metabolism, as expressed by the ammonia excretion rate, decreased by one order of magnitude in coregonids as the fish grew from 20 to 780 mg body weight. The slope of the relationship between oxygen uptake and swimming speed decreased in coregonid ontogenesis. In salmon, after 12 days of fasting 28% of energy used was derived from protein, whilst coregonid juveniles utilized mostly lipid. Active swimming in fasted juveniles of coregonid, as well as in salmon, led to the accelerated utilization of protein as a source of energy, based on AQ coefficients. In juveniles acclimated to a range of water temperatures from 14 to 26°C, the changes in standard or active metabolic rate (expressed as oxygen uptake or ammonia excretion) were described by Q10 coefficients. They were generally higher for the ammonia excretion rate than for the oxygen uptake rate and for active metabolism than for standard metabolism. Utilization of protein as energy for swimming differed significantly between the species, being in general one order of magnitude higher in coregonids than in salmon. The use of protein for swimming activity tended to decrease during coregonid ontogenesis.

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Rearing of coregonid (Coregonus schinzi palea cuv. et val.) larvae using dry and live food I. Preliminary data

Cited by 42 publications

References 11 publications

Suitability of two agglomerated commercial microdiets for rearing larvae of different strains of Coregonus lavaretus under cold-water conditions

Suitability of two agglomerated commercial microdiets for rearing larvae of different strains of Coregonus lavaretus under cold-water conditions

Rearing Larvae of Different Strains of Coregonus lavaretus under Cold Water Conditions: Comparison of a Special Cold-Water Line with a Standard Agglomerated Microdiet

Active metabolism in larval and juvenile fish: ontogenetic changes, effect of water temperature and fasting

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