Publication: Nutritional cellular biomarkers in early life stages of fish
Authors
Gisbert, E. ; Ortiz-Delgado, J.B. ; Sarasquete, C.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
Histological (tissular and cellular) indices
have a tradition of determining the nutritional condition
of fish both in the laboratory and in the wild. The
assessment of condition by means of microscopical
methods is probably the mos accurate indicator of
nutritional status during the early life stages of fish. This
success is partly attributable large amount of information
that can be derived from their study and because they are
thought to be the only true starvation indices. The
technique usually consists of the examination of cells
and organs and the establishment of a grading system
based on the presence/absence of standardised
biomarkers. Each organ is examined, and the cellular
aspect or tissular cohesion is evaluated qualitatively and
even quantitatively in order to obtain a measure of the
general condition of a larva. The literature indicates that
there are certain tissular and cellular responses to food
availability and quality, particularly in the digestive and
muscular tissues, which are common to most teleost fish
larvae. These responses, which are independent of water
temperature, can be used for assessing fish larvae
nutritional condition. In this regard, the microscopical
organization of the liver hepatocytes, the intestinal mucosa, the exocrine pancreas and the muscular fibers,
which are generally used as target tissues and organs to
assess the nutritional condition of fish larvae, is deeply
reviewed. The advantages and disadvantages of the use
of different cellular biomarkers of effect are discussed
considering different conditions.
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