National Scientific Center of Marine Biology, Far Eastern Branch of Russian Academy of Sciences, Vladivostok, Russia.
PeerJ. 2023 Feb 21;11:e14886. doi: 10.7717/peerj.14886. eCollection 2023.
Shell growth rates in relationship to seasonal changes of environmental factors were studied in a wild population of the Yesso scallop inhabiting Amur Bay (Peter the Great Bay, Sea of Japan, Russia). It was found that food availability is not a limiting factor for the scallop growth in the study area. A phytoplankton biomass of 3.5-6.0 g m provided high scallop growth rates. The largest daily shell increments were observed with a phytoplankton biomass of about 6 g m. With a decrease in the phytoplankton biomass to <2 g m, as well as with an increase to >11 g m, the daily shell increments reduced. It appeared that the main exogenous factors causing the seasonal variations in the scallop growth rates are the water temperature, which was too high in July and August (>18 °C) and too low in November-April (<4 °C), and the water salinity, which was too low (<30‰) for this stenohaline species in summer. The relationship of the daily shell increment in Yesso scallop with the water temperature can be described by a dome-shaped curve. The largest increments were observed at 8-16 °C. The dependence of the daily shell increments on the water salinity was also best described by a dome-shaped curve, showing the optimal range of 32.5-33.5‰. The revealed relationships, approximated by dome-shaped curves, evidently indicate that both insufficient and excessive effect of the factor negatively affects scallop growth. A suggestion was made to describe the result of the combined impact of several environmental factors on the daily shell increment as a multiplication of the functions of its dependence on each of the factors.
在俄罗斯彼得大帝湾（日本海）的阿穆尔湾（Amur Bay），研究了栖息在那里的野生虾夷扇贝（Yesso scallop）的壳生长速度与环境因素季节性变化之间的关系。研究发现，在研究区域食物的可获得性并不是限制扇贝生长的因素。当浮游植物生物量为 3.5-6.0 g/m³时，为虾夷扇贝提供了高的生长速度。当浮游植物生物量约为 6 g/m³时，观察到最大的日壳增量。当浮游植物生物量降至<2 g/m³或增加到>11 g/m³时，日壳增量减少。似乎导致虾夷扇贝生长率季节性变化的主要外源性因素是水温，7 月和 8 月水温过高（>18°C），11 月至 4 月水温过低（<4°C），以及海水盐度，对于这种狭盐性物种来说，夏季海水盐度过低（<30‰）。虾夷扇贝的日壳增量与水温之间的关系可以用一个圆顶形曲线来描述。在 8-16°C 时观察到最大的增量。日壳增量与海水盐度的关系也最好用圆顶形曲线来描述，显示出最佳范围为 32.5-33.5‰。所揭示的关系，通过圆顶形曲线来近似，可以明显表明，该因素不足或过度的影响都对扇贝的生长产生负面影响。有人建议，将几个环境因素对每日壳增量的综合影响的结果描述为其对每个因素的依赖函数的乘积。
