Journal of Agricultural Sciences, Belgrade 2011 Volume 56, Issue 1, Pages: 87-100
https://doi.org/10.2298/JAS1101087R
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Histological methods in the assessment of different feed effects on liver and intestine of fish
Rašković Božidar S. (Poljoprivredni fakultet, Beograd-Zemun)
Stanković Marko B. (Poljoprivredni fakultet, Beograd-Zemun)
Marković Zoran Z. (Poljoprivredni fakultet, Beograd-Zemun)
Poleksić Vesna D. (Poljoprivredni fakultet, Beograd-Zemun)
This manuscript describes the importance of using histological methods to
assess the effects of feed on the liver and intestine of fish. Due to the
constantly increasing world production of fish and other aquatic organisms,
it is necessary to replace fishmeal and fish oil in diets with less expensive
raw materials of plant origin. Due to the increased fiber content, increased
presence of carbohydrates, antinutritional factors, and inappropriate content
of amino acids and new compounds can have negative effects on the digestive
system of fish and therefore on fitness, health and production
characteristics of cultivated fish. The liver and intestines are the most
important organs for the digestion and absorption of nutrients from feed.
Therefore, monitoring histological structure of fish liver and intestine is
the method of choice in assessing the effects of nutrient mixtures that use
raw materials of plant origin. For both of these vital organs the normal
histological structure and the most important results obtained by research
are discussed. This paper presents a critical review of the histological
methods used in research on feed effects. Results related to the negative
effects of raw soy-based feed on the occurrence of enteritis in carnivorous
fish species are discussed. The results point out that use of modern approach
in fish pathology such as improved histochemical, stereological, scoring, and
other analytical methods could be a beneficial approach in an accurate
assessment of new feed effects on fish.
Keywords: fish, nutrition, effects, histology, liver, intestine