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Nutrition-related histopathology of the intestine of milkfish Chanos chanos fry

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Date
1987
Author
Segner, Helmut
Burkhardt, Patricia
Avila, Enrique M.
Juario, Jesus V.
Storch, Volker
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Abstract
A histopathological study was conducted on the intestine of milkfish larvae Chanos chanos, subjected to different nutritional conditions. Newly caught milkfish fry, ca 20 d old, were starved for 7 d and and then fed with either Artemia nauplii or Chlorella sp. The latter diet, as already shown in other studies, is detrimental to young milkfish. A third, control group of fry was starved for a further 2 d. In larvae fed with Artemia, 1 to 2 h after feeding, intensive lipid absorption was noted in the first part of the intestine (Intestine I, lipid-absorbing zone, midgut). The second part of the intestine (Intestine II, hindgut) was characterized by pinocytotic activity and the presence of large supranuclear vacuoles. Food deprivation for 9 d resulted in cellular hydration, transformation of mitochondria, disturbances of the basal labyrinth and appearance of autolytic vacuoles in enterocyte cytoplasm in Intestine I, with a proximo-distal gradient of severity of enterocytic degeneration. In Intestine II, supranuclear vacuoles were replaced by dense bodies; pinocytotic activity was maintained at a reduced level. Microvilli were fragmented over the whole length of the intestine. Chlorella-fed larvae, although containing broken algae within the gut lumen, displayed no signs of nutrient absorption as detectable by electron microscopy. In Intestine I, enterocytes contained bizarre nuclei, an enhanced number of lysosomes and occasionally large intracellular vacuoles. In addition, intercellular spaces were dilated. Mitochondria appeared pale and swollen throughout the gut. Histological alterations in Intestine II were similar to those for starved fry.
URI
http://hdl.handle.net/10862/1281
Suggested Citation
Segner, H., Burkhardt, P., Avila, E. M., Juario, J. V., & Storch, V. (1987). Nutrition-related histopathology of the intestine of milkfish Chanos chanos fry. Diseases of Aquatic Organisms, 2(2), 99-107.
Subject
Animal nutrition; Food organisms; Histopathology; Intestines; Chanos chanos
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  • AQD [1108]

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