Microparticulate Diets: Testing and Evaluating Success

Holt, G. Joan; Webb, Kenneth A.; Rust, Michael

doi:10.1002/9780470959862.ch13

Cited by 21 publications

(29 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the measurement of the microdiet intake rates was not feasible due to methodological issues (Holt et al . ). The pellets were sieved to obtain particles of two size ranges (120–200 and 200–400 μm).…”

Section: Methodsmentioning

confidence: 99%

Peptide molecular weight distribution of soluble protein fraction affects growth performance and quality in European sea bass (Dicentrarchus labrax) larvae

et al. 2013

View full text Add to dashboard Cite

Dicentrarchus labrax were fed from 10 to 40 days posthatching with six microdiets differing in the inclusion level (60 g kg‐1 and 120 g kg‐1) and type of protein hydrolysate (PH; yeast, YPH; pig blood, PBPH; pig red blood cells, PRBCPH). A microdiet containing 120 g kg‐1 fish PH (FPH) was used as a control. PH differed in their amino acid (AA) profile and molecular weight distribution and therefore the tested microdiets too. The estimated content in FAA and di‐ and tripeptides in the FPH microdiet was 2 g kg‐1 and 44 g kg‐1, respectively. FAA estimated levels in YPH and PBPH microdiets were 26 g kg‐1 and 53 g kg‐1, whereas levels of di‐ and tripeptides were 30 g kg‐1 and 60 g kg‐1, respectively. The estimated levels of FAA in PRBCPH microdiets were 8 g kg‐1 and 17 g kg‐1, whereas estimated levels of di‐ and tripeptides were 11 g kg‐1 and 22 g kg‐1, respectively. Results revealed that FPH may be replaced by alternative PH from yeast and pig blood products, as fish fed those diets performed, in terms of growth, survival, digestive function and incidence of skeletal deformities, as well as those fed the FPH microdiet. Using YPH, PBPH and PRBCPH, the inclusion level of PH in microdiets might be reduced to a half with respect to current practices using FPH.

show abstract

Section: Methodsmentioning

confidence: 99%

Peptide molecular weight distribution of soluble protein fraction affects growth performance and quality in European sea bass (Dicentrarchus labrax) larvae

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Survival of around 50% has been reported (Lucynski et al, 1986;Rösch & Dabrowski, 1986) in studies using "old generation" microdiets, however, they were performed under more favorable, higher water temperatures (> 8 °C). 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).…”

Section: Agglomerated Microdiets Compared To Previous Onesmentioning

confidence: 99%

“…More recently the industry increasingly uses the process of agglomeration to improve performance of starter feeds (microdiets) for small larvae of mainly marine species. Through this process, individual particles are enlarged in order to facilitate handling and to avoid dust formation (Langdon & Barrows, 2011;Holt et al, 2011). However, the suitability of these agglomerated dry feeds has not been extensively tested for whitefish respectively published.…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

“…During the last three decades, however, significant advances have been made to replace live feed and inadequate dry diets by newly developed microdiets as a starter feed for various, mainly marine, fish larvae (Holt, Webb, & Rust, ; Kolkovski, , ; Roennestad et al., ). This “new generation” of starter feeds is based on the technology of cold extrusion and agglomeration of ingredients, which make the individual components of the microdiets easier to digest and to avoid dust formation (Holt et al., ; Kolkovski, , ; Langdon & Barrow, ). Several commercial manufacturers now advertise microdiets dedicated to replace live feeds (mainly Artemia nauplii) or at least to advance weaning from live feeds.…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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

show abstract

Microparticulate Diets: Testing and Evaluating Success

Cited by 21 publications

References 32 publications

Peptide molecular weight distribution of soluble protein fraction affects growth performance and quality in European sea bass (Dicentrarchus labrax) larvae

Peptide molecular weight distribution of soluble protein fraction affects growth performance and quality in European sea bass (Dicentrarchus labrax) larvae

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

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

Contact Info

Product

Resources

About