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Abstract

This work provides a comparative data of α-amylase activity in the gut extract of three Cyprinid species inhabiting Garma River (Basrah Governorate, Southern Iraq). Those species are bunny Barbus sharpeyi (herbivorous), common carp Cyprinus carpio (omnivorous), and shilik Aspius vorax (carnivorous). The study also investigate the discrepancy between the activity of the enzyme in common carp collected from Garma river with those reared in ponds. The specific activity of α-amylase has apparently been influenced by feeding habits of the three studied species. Values of α-amylase activity averaged 1.84 U mg -1 protein in the herbivorous bunny. It showed a significant (P<0.01) superiority to that of the omnivorous common carp (1.33 U mg -1 protein) which, in turn, showed a significant (P<0.01) superiority to that of the carnivorous shilik (0.76 U mg -1 protein). Omnivorous common carp which was collected from fish ponds showed a significantly (P<0.01) higher value of α-amylase specific activity which reached 1.92 U mg -1 protein when compared with the value recorded in common carp collected from Garma River which reached 1.33 U mg -1 protein.

Feeding habits and ontogenic changes in digestive enzyme patterns in five freshwater teleosts

“…Several studies have evaluated the correlation between groups of digestive enzymes and fish feeding habits (Hofer & Schiemer, 1981;Hofer, 1982;Hidalgo et al, 1999;German et al, 2004;Horn et al, 2006;López-Vásquez et al, 2009;Al-Tameemi et al, 2010). In this study and regardless of the developmental stage considered, the analysis of the activity of digestive enzymes showed that fry from the five studied fish species grouped in two major groups, the first one composed of ommivorous species such as L. leuciscus, R. rutilus and C. a. gibelio, and the second one was formed by P. fluviatilis and S. lucioperca.…”

“…The present results are in agreement with previous data that showed that the -amylase activity is higher in omnivorous than in carnivorous fishes. Likewise, although the nutritional habits do not determine the concentration of the proteolytic enzymes (Hidalgo et al, 1999), in several works it has been reported that the A:P in omnivorous and herbivorous fishes was higher than in carnivorous species (Fange & Grove, 1979;Ugolev et al, 1983;Hidalgo et al, 1999;Al-Tameemi et al, 2010).…”

Age, growth, fecundity and mortality of Aspius vorax (Heckel, 1843) in Karakaya Reservoir (in Euphrates River), Turkey

“…The Asp, Aspius vorax (Heckel, 1843) is a native and highly commercial cyprinid species inhabitıng Euphrates-Tigris Basin in Turkey, Syria and Iraq (Kuru, 1996;Coad, 1996;Geldiay andBalık, 2007, Oymak et al, 2011). On this species have been conducted at different localities in Iraq and Syria (Shafi and Jasim, 1982;Ali et al, 1986;Al-Dabical and Al-Daham, 1995;Epler et al, 2001;Al-Tameemi et al, 2010;Al-Saleh et al, 2012). Also, there are some studies in Turkish freshwaters that were carried out to attain information on biological characteristics of A. vorax (Özdemir et al, 1985;Oymak et al, 2011).…”

Draft Genome Sequence of Lactococcus lactis Subsp. cremoris WA2-67: A Promising Nisin-Producing Probiotic Strain Isolated from the Rearing Environment of a Spanish Rainbow Trout (Oncorhynchus mykiss, Walbaum) Farm

“…In this regard, α-amylase plays a crucial role in fish digestion of complex carbohydrates, such as glycogen and starch, which are common compounds in the feed of aquacultured species [ 67 ]. Therefore, the ability of fish to synthesize these enzymes, or their external supplementation through feed, will strongly determine their capacity to degrade and assimilate carbohydrates and proteins [ 68 ].…”