Determination of apparent protein digestibility of live Artemia and a microparticulate diet in 8-week-old Atlantic cod Gadus morhua larvae

Johnson, Roberta; Cook, Matthew A.; Nicklason, Peter M.; Rust, Michael

doi:10.1016/j.aquaculture.2008.11.033

Cited by 15 publications

(7 citation statements)

References 46 publications

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“…Both PARA particle samples and fish samples were analysed for yttrium oxide using inductively coupled plasma‐optical emission spectroscopy (ICP‐OES) with a Perkin Elmer Optima 3000 Radial ICP‐OES (Perkin Elmer Instruments, Norwalk, CT). Larval fish and diet samples were prepared as in Johnson, Cook, Nicklason, and Rust () with a modification whereby sample ash was digested overnight at room temperature. The wavelength employed was 371.029 nm, and standards were obtained from Ultra Scientific (North Kingstown, RI).…”

Section: Methodsmentioning

confidence: 99%

Evaluation of dietary taurine concentrations in microparticulate diets provided to larval California yellowtail (Seriola dorsalis ) postlarvae

Stuart

Hawkyard

Barrows³

et al. 2017

Aquacult Nutr

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Taurine is an important amino acid derivative for marine and freshwater fish, especially during early development. We investigated the range of taurine concentrations that influence the growth and survival rates of California yellowtail (CYT; Seriola dorsalis) during transition from live feeds to microparticulate diets, as well as the extent to which nutrient leaching from the microparticulate diets affects these ranges. We tested particle‐assisted rotationally agglomerated (PARA) particles with four levels of taurine: 4 (low taurine; LT), 45 (medium taurine; MT), 93 (high taurine; HT) and 122 g/kg (very high taurine; VHT). Our results showed that CYT postlarvae had no significant differences in growth, survival and feed consumption rates between the MT, HT and VHT treatments. However, it should be noted that the PARA particles containing 122 g/kg (VHT) taurine were especially prone to leaching and may have had taurine concentrations as low as 34.9 g/kg before they settled on the bottom of the tank. Therefore, the actual dietary taurine concentrations experienced by the larvae were likely lower than the initial dietary concentrations. More research is needed to evaluate the potential nutrient toxicity of elevated dietary taurine concentrations for marine fish larvae and juveniles.

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Section: Methodsmentioning

confidence: 99%

Evaluation of dietary taurine concentrations in microparticulate diets provided to larval California yellowtail (Seriola dorsalis ) postlarvae

Stuart

Hawkyard

Barrows³

et al. 2017

Aquacult Nutr

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“…However, recent improvements in feed manufacture technologies and analytical methods allowed the incorporation of inert markers in larval feeds (Cook et al 2008). Consequently, Johnson et al (2009) were able to incorporate yttrium oxide in inert diet and Artemia and to assess that 58 DAH Atlantic cod (Gadus morhua) larvae had a feed intake between 0.57-0.79% and 0.67-0.84% for the inert diet and Artemia, respectively. However, this method is quite time consuming, and its application is species specific, depending on the possibility of implementing a faecal collection procedure.…”

Section: Diet Selectionmentioning

confidence: 99%

Novel methodologies in marine fish larval nutrition

Conceição

Aragão

Richard

et al. 2009

Fish Physiol Biochem

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Major gaps in knowledge on fish larval nutritional requirements still remain. Small larval size, and difficulties in acceptance of inert microdiets, makes progress slow and cumbersome. This lack of knowledge in fish larval nutritional requirements is one of the causes of high mortalities and quality problems commonly observed in marine larviculture. In recent years, several novel methodologies have contributed to significant progress in fish larval nutrition. Others are emerging and are likely to bring further insight into larval nutritional physiology and requirements. This paper reviews a range of new tools and some examples of their present use, as well as potential future applications in the study of fish larvae nutrition. Tube-feeding and incorporation into Artemia of (14)C-amino acids and lipids allowed studying Artemia intake, digestion and absorption and utilisation of these nutrients. Diet selection by fish larvae has been studied with diets containing different natural stable isotope signatures or diets where different rare metal oxides were added. Mechanistic modelling has been used as a tool to integrate existing knowledge and reveal gaps, and also to better understand results obtained in tracer studies. Population genomics may assist in assessing genotype effects on nutritional requirements, by using progeny testing in fish reared in the same tanks, and also in identifying QTLs for larval stages. Functional genomics and proteomics enable the study of gene and protein expression under various dietary conditions, and thereby identify the metabolic pathways which are affected by a given nutrient. Promising results were obtained using the metabolic programming concept in early life to facilitate utilisation of certain nutrients at later stages. All together, these methodologies have made decisive contributions, and are expected to do even more in the near future, to build a knowledge basis for development of optimised diets and feeding regimes for different species of larval fish.

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“…However, digestibility is a difficult measurement to make in large fish, and the most satisfactory approaches use physiologically inert markers with removal of the faeces directly from the fish at defined times after feeding (Percival et al, 2001). Protein digestibility for a microparticulate feed was 76e86% and higher than the 47e58% for Artemia (Johnson et al, 2009). The small size of larvae poses real challenges in the collection of faeces and the accurate measurement of extremely small amounts of nutrients and elements.…”

Section: Nutritional Physiology Of Larval and Early Juvenile Fishmentioning

confidence: 99%

Feeding in hatcheries

Carter

2015

Feed and Feeding Practices in Aquaculture

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Determination of apparent protein digestibility of live Artemia and a microparticulate diet in 8-week-old Atlantic cod Gadus morhua larvae

Cited by 15 publications

References 46 publications

Evaluation of dietary taurine concentrations in microparticulate diets provided to larval California yellowtail (Seriola dorsalis ) postlarvae

Evaluation of dietary taurine concentrations in microparticulate diets provided to larval California yellowtail (Seriola dorsalis ) postlarvae

Novel methodologies in marine fish larval nutrition

Feeding in hatcheries

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