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| Kime, D.E.; Ebrahimi, M.; Nysten, K.; Roelants, I.; Rurangwa, E.; Moore, H.D.M.; Ollevier, F.P.. |
| Computer assisted sperm analysis (CASA) has been used to analyse the effects of cadmium and zinc on the motility of fish sperm treated either for 24h after partial dilution in an extender, or during the final dilution step on the microscope stage during video recording. The progressive motility of catfish sperm, which was not affected by storage for 24h, was decreased after exposure to 100 ppm cadmium or 2000 ppm zinc in extender for 24h. Only 1000 ppm cadmium or 2000 ppm zinc had any effect on motility when added to sperm at the final dilution stage. These results suggest that concentrations of cadmium which have been found to be present in fish gonads as a result of bioaccumulation from the water or diet may decrease the motility of sperm during... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1996 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2993 |
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| Chen, H.-Y.; Leu, Y.-T.; Roelants, I.. |
| Using microencapsulated L-arginine, the quantitative requirement for amino acids has been determined for the first time for a shrimp species, which can not effectively utilize crystalline amino acids. In an 8 wk feeding trial (1990), juvenile <i>Penaeus monodon</i> were fed casein based purified diets containing one of six levels (13.1, 17.7, 22.3, 26.9, 31.5 and 36.1 g/kg diet) of arginine. In addition to the protein-bound arginine already present in the casein of the test diets, pure arginine was supplemented by L-arginine microencapsulated in cellulose acetate phthalate, which is easily assimilated. The arginine level required for optimal growth was determined by broken-line model analysis of weight gain data to 25.0 g/kg diet (= 54.7 g/kg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Penaeus monodon [giant tiger prawn]. |
| Ano: 1992 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2708 |
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| Chen, H.-Y.; Leu, Y.-T.; Roelants, I.. |
| Effective dietary supplementation of arginine was demonstrated in juvenile <i>Penaeus monodon</i> which can not effectively utilize crystalline amino acids in their diets. In an 8-week feeding trial, juvenile <i>P. monodon</i> (average body weight, 0.95 g) were fed casein-based purified diets supplemented with cellulose-acetate-phthalate (CAP) microencapsulated L-arginine, or glycerol-mono-stearate (GM) microencapsulated L-arginine. There was no significant difference in the growth-promoting effects and feed conversion among the CAP, FM and SAL groups. The mean final weight of shrimp fed the crystalline-arginine supplemented diet was higher than that of the group fed the unsupplemented diet but the difference was not significant.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Penaeus monodon [giant tiger prawn]. |
| Ano: 1992 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2704 |
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