The response of digestive proteases to abrupt salinity decrease in the euryhaline sparid Sparus aurata L.

摘要: The response of the digestive proteases to abrupt salinity change was studied in juvenile gilthead sea bream (Sparus aurata) for 15 days after transfer from 33 per thousand 21 thousand. Salinity decrease affected significantly neither activity total acid stomach, nor activities alkaline and major serine proteases--trypsin chymotrypsin--in part intestine. different between segments intestine, with posterior intestine presenting highest followed by pyloric caeca. This distribution pattern remained unaffected decrease. Notably, led significant alterations elastase carboxypeptidase activity. changes were more prominent upper (pyloric caeca anterior intestine) than In alteration A B observed, confined together activity, while restricted results are discussed relation osmoregulatory action intestinal dietary protein digestion.