褐牙鲆亲鱼野生群体与养殖群体维生素A、C、E含量的比较

为探讨养殖褐牙鲆(Paralichthys olivaceus)亲鱼后代较野生亲鱼后代质量下降这一问题,本实验分析了野生与人工养殖(包括营养强化处理)褐牙鲆亲鱼肌肉、肝脏及卵中维生素A、维生素C、维生素E含量的差异,并进行了养殖褐牙鲆维生素营养强化的探索实验.结果显示,野生与养殖亲鱼肌肉和肝脏中维生素A含量无显著差异,野生亲鱼卵中维生索A含最显著高于养殖亲鱼(P<0.05);野生亲鱼肝脏和卵中维生素C含量显著高于养殖亲鱼(P<0.05),肌肉中两者无显著差异(P>0.05);维生素E含量在野生和养殖亲鱼各组织内均有显著差异(P<0.05),仅肝脏中养殖亲鱼显著低于野生亲鱼(P<0.05),其余组织均为养殖亲鱼较高.在本实验中,营养强化显著增加了养殖亲鱼肌肉和肝脏维生素A、维生素C及卵和肝脏中维生素E的含量,但对卵中维生素A和C的含量均无显著影响(p>0.05),而肌肉中维生素E含量则显著降低(P<0.05).上述结果表明,养殖与野生褐牙鲆亲鱼卵中维生素A、C、E含量存在一定的差异,可能与养殖褐牙鲆亲鱼后代质量下降有关,本实验所采用的营养强化方法仅增加了养殖亲鱼卵中维生素E的含量,而对卵中维生素A和维生素C的含量无显著影响,更为有效的强化方式有待进一步研究.

A comparison study of Vitamin A, C and E in wild and farmed Japanese flounder, Paralichthys olivaceus

A comparison analysis of vitamin A, C and E contents in muscle, liver and eggs of wild, cultured and nutrition fortified broodstock was conducted, attempting to explain the decline of larval fish quality in farmed . The results showed that no differences were found in vitamin A content of wild and farmed fish, however, egg vitamin A content of wild fish was significantly higher than that of farmed fish (<0.05). Vitamin C contents in liver and eggs of wild fish were statistically higher than those of farmed fish (<0.05), while no change were detected in muscle. Vitamin E content in muscle and egg of wild fish were significantly higher than those of farmed fish, with liver vitamin E content following the opposite tendency. Fortification strategies in this study improved vitamin A and C contents in liver and muscle, vitamin E content in eggs of farmed broodstock, while vitamin A and C contents in eggs as well as vitamin E content in muscle changed a little (>0.05). All the above results reached a conclusion that the discrepancy of vitamin A, C and E contents existed between wild and farmed fish, to some extent, may be correlated with the decline of the larval fish quality in the culture of , and this could be diminished by more effective fortification strategies of vitamin A, C and E, which is needed to be further studied.