Distribution of cholecystokinin-immunoreactive cells in the gut of developing Atlantic cod Gadus morhua L. larvae fed zooplankton or rotifers

One of the main gastrointestinal hormones, cholecystokinin (CCK), was studied in order to advance understanding of the control of the digestive process in Atlantic cod Gadus morhua larvae after onset of first feeding. Larvae were fed either natural zooplankton or enriched rotifers in similar rearing...

Full description

Saved in:
Bibliographic Details
Published in:Journal of fish biology 2009-09, Vol.75 (4), p.834-844
Main Authors: Hartviksen, M. B., Kamisaka, Y., Jordal, A.-E. O., Koedijk, R. M., Rønnestad, I.
Format: Article
Language:English
Subjects:
Animals
Atlantic cod
Brachionus plicatilis
cholecystokinin
Cholecystokinin - physiology
Diet
digestive tract
Gadus morhua
Gadus morhua - physiology
Gastrointestinal Tract - cytology
Immunohistochemistry
immunoreactive cells
Larva - physiology
Marine
Rotifera
Zooplankton
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:One of the main gastrointestinal hormones, cholecystokinin (CCK), was studied in order to advance understanding of the control of the digestive process in Atlantic cod Gadus morhua larvae after onset of first feeding. Larvae were fed either natural zooplankton or enriched rotifers in similar rearing systems and sampled from hatching to 22 days post‐hatch (dph). CCK was visualized by immunohistochemistry and the first CCK‐immunoreactive (IR) cells were detected at 8 dph corresponding to 6 days after first feeding. The CCK‐IR cells were mostly found in the anterior midgut, and the number of CCK‐IR cells was lower in the posterior midgut. They were also present in the hindgut of some of the larvae, but not in the foregut. No clear differences were found in the ontogenetic appearance and the distribution pattern of CCK‐IR cells between the two dietary treatments. This indicates that the onset of CCK production in the gut as well as the spatial distribution of the CCK‐IR cells is not differentially affected by these diets. To what extent the hormone production itself is influenced by dietary factors needs to be studied by more sensitive methods.
ISSN:0022-1112
1095-8649
DOI:10.1111/j.1095-8649.2009.02325.x