23 research outputs found
Impact of metabolic syndrome and its components on heart rate variability during hemodialysis: a cross-sectional study
Summer yield of fish in polyculture in Transkei, South Africa, using pig manure with and without formulated feed
No Abstract
THE USE OF HOLDING CAGES FOR THE SPAWNING OF CLARIAS-GARIEPINUS
Use is made of plastic covered wire mesh cages to minimise the stress and physical damage caused by the inherent aggression of Clarias gariepinus during the spawning phase. The cages enable a single person to perform the entire hormonal injecting programme with a minimum of stress in a relatively short period of time
THE INFLUENCE OF DIFFERENT DIETARY LIPIDS ON THE GROWTH AND BODY-COMPOSITION OF THE AFRICAN SHARPTOOTH CATFISH, CLARIAS-GARIEPINUS (BURCHELL)
The influence of various lipid sources on the muscle fatty acid composition of juvenile African sharptooth catfish Clarias gariepinus, was tested Juveniles were fed an artificial diet,for 60 days, containing no lipid (Al control), or the following lipids at 10% of the diet, sunflower oil (B, a high level of C18:1 omega 9 and C18:2 omega 6), cod liver oil (C, a high level of 20 and 22 C omega 3 fatty acids) and tallow (D, predominantly SFA and MUFA). The best growth was achieved by fish fed the sunflower diet. Muscle total lipid composition was strongly influenced by diet and contained the following SFA, MUFA and PUFA percentages, and a omega 3/omega 6 ratio of A, 36.33; 45.13; 15.70% & 0.52; B, 30.78; 34.54; 33.96% & 0.11; C, 33.51; 38.75; 24.59% & 1.87; D, 38.87; 46.03; 13.06% & 0.44, respectively
COMPARISON OF HUMIDITY CHAMBER, MARISOURCE HATCHING-TRAY AND ZUGER GLASS FUNNEL INCUBATION SYSTEMS FOR BREEDING OF CYPRINUS-CARPIO (L) AND CLARIAS-GARIEPINUS (BURCHELL)
Humidity chamber, MariSource hatching-tray and ''Zuger'' glass funnel incubation systems were compared for hatching successes of both Cyprinus carpio and Clarias gariepinus fertilised eggs. The humidity chamber incubation system proved superior for C. carpio, whilst the MariSource hatching-tray system was better for C gariepinus. Fungal infections greatly influenced hatching results
Thermal effect on the life-cycle parameters of the medically important freshwater snail species lymnaea (radix) luteola (lamarck)
The snails Lymnaea (Radix) luteola exhibited marked variations in
growth, longevity, and attaining sexual maturity at different
temperatures and diets. At 10 C, irrespective of foods, pH and salinity
of water, the snails had minimum life span, maximum death rate and
lowest growth rate. At 15 C, the growth rate was comparatively higher
and the snails survived for a few more days. But at these temperatures
they failed to attain sexual maturity. Snails exposed to pH 5 and 9 at
20 , 25 , 30 , 35 C and room temperatures (19.6 -29.6 C); to 0.5, 1.5
and 2.5 NaCl at 20 and 35 C; to 2.5 NaCl at 25 C and room temperatures
failed to attain sexual maturity. The snails exposed to pH 7 and
different salinity grades at 20 , 25 , 30 , 35 C and room temperatures
became sexually mature between 25-93 days depending upon the type of
foods used in the culture