Effects of temperature, salinity, and food availability on shell growth rates of the Yesso scallop

PeerJ

article

Alla V. Silina¹ 

[1] National Scientific Center of Marine Biology, Far Eastern Branch of Russian Academy of Sciences

关键词: Mollusks;    Bivalves;    Scallops;    Growth;    Shell;    Environment;    Ecology;   

DOI  :  10.7717/peerj.14886

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Shell growth rates in relationship to seasonal changes of environmental factors were studied in a wild population of the Yesso scallop Mizuhopecten yessoensis 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–3 provided high scallop growth rates. The largest daily shell increments were observed with a phytoplankton biomass of about 6 g m–3. With a decrease in the phytoplankton biomass to <2 g m–311 g m–318 °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.

【 授权许可】

CC BY