Document Detail


Novel methodologies in marine fish larval nutrition.
MedLine Citation:
PMID:  20035382     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Luis E C Concei??o; Cl?udia Arag?o; Nad?ge Richard; Sofia Engrola; Paulo Gavaia; Sara Mira; Jorge Dias
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review     Date:  2009-12-25
Journal Detail:
Title:  Fish physiology and biochemistry     Volume:  36     ISSN:  1573-5168     ISO Abbreviation:  Fish Physiol. Biochem.     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-23     Completed Date:  2010-07-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100955049     Medline TA:  Fish Physiol Biochem     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1-16     Citation Subset:  IM    
Affiliation:
CCMAR-Centro de Ci?ncias do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, Portugal. lconcei@ualg.pt
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MeSH Terms
Descriptor/Qualifier:
Animal Feed / analysis*
Animal Nutrition Sciences*
Animals
Diet / veterinary
Dietary Proteins / metabolism
Feeding Methods
Fishes / metabolism,  physiology*
Larva
Metagenomics
Models, Biological
Proteomics
Chemical
Reg. No./Substance:
0/Dietary Proteins

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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