H.F. Al-Kahem, A.S. Al-Akel, M.J.K. Shamsi and Z. Ahmed
Cyprinion mhalensis is a selective feeder as it feeds on a variety of food items. Selection varies proportionally with prey abundance. Smaller fishes generally feed on zooplankton while larger ones mostly on phytoplankton. Detectability and acceptability may be the main factors for food selection.
Fouad M. Attia, A.A. Alsobayel, M.F. Shawer, M.S. Bayoumi and H.A. Hassan
Data on serum and yolk cholesterol were collected from Single Comb WHite Leghorn (SCWL) and Saudi Arabian Baladi (SAB) fowl that had been maintained as random bred closed flocks. Young pullets had significantly higher serum cholesterol levels than males of the same age in the two breeds. Serum cholesterol levels of SAB adult hens were higher (P ≤ 0.01) than those of SCWL hens.
The phenotypic correlation coefficients between cholesterol levels in peripheral serum of adult birds and egg constituents were inconsistent, low in magnitude and generally nonsignificant. There were positive correlations of cholesterol serum levels with yolk weight (+ 0.26; P ≤ 0.05) and body weight (+0.19; P ≤ 0.05) in SCWL which had heavier body weight (P ≤ 0.01) than SAB birds.
Phenotypic correlations between yolk cholesterol and the egg traits were small, inconsistent and generally nonsignificant; except for the correlation between yolk cholesterol and yolk weight (+ 0.45; P ≤ 0.01), egg weight (+ 0.; P ≤ 0.01) and body weight (+ 0.47; P ≤ 0.01) in SAB hens, which had smaller yolk weight (P ≤ 0.05) smaller egg weight and body weight (P ≤ 0.01) than SCWL hens. The results indicate that neither peripheral serum cholesterol nor yolk cholesterol have significant effects on egg constituents in SAB compared with SCWL fowl.