مطالعه ارتباط بين تركيب بيوشيميايي تخمك و درصد لقاح در تاسماهي ايراني قره برون

Study on the relationship between biochemical composition of egg and fertilization rate in Persian sturgeon (Acipenser persicus)

In order to determine the relationship between biochemical composition of ovulated egg and fertilization rate (F.R.) in Persian sturgeon (Acipenserpersicus Borodin 1987) breeders of Persian sturgeon with same stage of sexual maturity were selected and propagated artificially. During of ovulation their eggs were sampled (24 specimens) and fertilization rate of eggs were recorded while biochemical composition of eggs such as: content of lipid (L) and phospholipid (PL), ratio of PL/L, fatty acids level and area of PLs were determined . Breeders, according to F.R. divided in two groups: first group with higher than 50% and second group with lower than 50%. Results showed that egg composition of females that had higher fertilization rate were different in some cases from those that had lower fertilization rate. Level of oleic fatty acid in the first group was 41.48% and in the second group was 44.9% (p<0.05). Ratio of PL/L in first group was 8/8% and in second group was 17/6% (p<0.05). Total area of phosphotidyl choline and Lysophosphatidyl ethanolamine in first group was 53.2% and in second group was 55.5% (p<0.05). But in this study no significant differences were found in another fattyacids and total lipid content and area of another PLs (p>0.05).