Background: Due to the paucity of oceanic resources utilized in the preparation of diets for cultured fish, commercial feed producers have been trying to replace fishmeal (FM) using alternative protein sources such as vegetable protein meals (VMs). One of the main drawbacks of using VMs in fish feed is related to the presence of a variety of anti-nutritional factors, which could trigger an infl...

the histology of digestive tract of caspian roach (rutilus rutilus caspicus) were studied for 53 days from hatching to fingerling size at the natural habitat of the larval stage. ages 1, 4, 10, 18, 28, 39 and 53 days after hatching (dah) were selected for the histological studies. after sampling and fixation with 10 percent formalin the histological process were conduct. the newly hatched larva...

background: determination of digestive enzymes activity would provide critical information in the design of appropriate diet. sobaity, sparidentex hasta is found in the persian gulf and  cultured in countries adjacent to it. objectives: this study investigated proteolytic, amylase and lipase activities in the intestine of sparidentex hasta captured from the  persian gulf. methods: 60 immature s...

Background: The application of nano-particles (NPs) in various industries is growing. Since their toxicity is not clearly understood, they can cause adverse effects on the environment. The aim of this study was to evaluate the histopathological effects of iron oxide nano-particles on the small intestine of common carp, Cyprinus carpio. Methods: Four experimental treatments were designed (15 ...

The aim of the present work was to investigate the transcriptome response of gilthead sea bream (Sparus aurata) after challenge with the myxosporean Enteromyxum leei, a wide-spread enteric parasite causing heavy economic losses in Mediterranean sparid farms. This parasite causes severe desquamative enteritis which usually leads to death of the fish, and there are no preventative or curative tre...

A study was carried out from October, 2009 to April, 2010 with the objective of isolating Edwardsiella tarda an important fish pathogen from fish harvested for human consumption from Lake Zeway and Langanoo. A total of 372 tissue samples (three from each fish) comprising liver, intestine and kidney were collected from 124 fish (Clarias gariepinus and Oreochromis niloticus originated from Lake L...