Shephard K L
Comp Biochem Physiol C Comp Pharmacol Toxicol. 1987;86(2):383-6. doi: 10.1016/0742-8413(87)90100-9.
The diameter, trans-chorion potential difference and perivitelline-fluid pH of the eggs of perch (Perca fluviatilis) have been measured in a range of water pH (8-4.5). The water used was relatively nutrient rich. Eggs transferred from pH 8 to pH 4.5 shrink; probably as a result of loss of water from perivitelline fluid. Trans-chorion potential differences are close to zero over the range of pH. Mean perivitelline-fluid pH is higher than external water pH at pH 6.7 and above. Below pH 6.7, mean perivitelline-fluid pH is approximately the same as external water pH. The results suggest a non-Donnan distribution of hydrogen ions. The results are compared with data on salmonid eggs in nutrient-poor waters.
在一系列水体pH值（8 - 4.5）范围内，对鲈鱼（河鲈）卵的直径、跨绒毛膜电位差和卵黄周液pH值进行了测量。所用水体相对营养丰富。从pH 8转移至pH 4.5的卵会收缩；这可能是卵黄周液失水的结果。在该pH值范围内，跨绒毛膜电位差接近零。在pH 6.7及以上时，卵黄周液平均pH值高于外部水体pH值。在pH 6.7以下，卵黄周液平均pH值与外部水体pH值大致相同。结果表明氢离子呈非唐南分布。将这些结果与贫营养水体中鲑科鱼卵的数据进行了比较。
