Journal of Tropical Oceanography >
Effects of environmental factors on larval settlement and metamorphosis of the fouling organism Mytilopsis sallei
Copy editor: LIN Qiang
Received date: 2024-06-13
Revised date: 2024-07-23
Online published: 2024-09-12
Supported by
National Key Research and Development Program of China(2022YFC3106004)
High-quality Development of Marine and Fishery industry Project of Fujian(FJHYF-L-2023-14)
Ocean Service and High-quality Development of Fishery Project of Fujian(FJHY-YYKJ-2023-1-5)
The Project from China Nuclear Power Engineering Co., Ltd.(20223160A0857)
The false mussel Mytilopsis sallei is an important invasive fouling organism in the south of China, which often attaches to aquaculture facilities and causes fishery losses. In this study, the ecological single-factor gradient test was used to test larval settlement and metamorphosis of M. sallei under different salinities, water temperatures, light intensities and dissolved oxygen concentrations. The results showed that M. sallei larvae could settle and metamorphose at temperatures between 25℃~35℃. Low temperatures (10℃ and 15℃) significantly inhibited larval settlement and metamorphosis, while high temperature (40℃) caused the death of larvae. M. sallei larvae could settle and metamorphose under a wide salinity range (15‰~30‰), with the optimal salinity of 15‰. The suitable light intensity was 0’5000 lx, but when light intensity was higher than 10000 lx, larval settlement and metamorphosis were significantly inhibited. M. sallei larvae had a strong resistance capacity to low dissolved oxygen concentration. The suitable dissolved oxygen concentration for its settlement and metamorphosis was 40%’100% of saturated oxygen concentration (3.2’8.0 mg·L-1), but when the dissolved oxygen concentration was lower than 20% (1.6 mg·L-1), larval settlement and metamorphosis were inhibited. This study revealed the suitable environmental conditions on larval settlement and metamorphosis of M. sallei, which is important for predicting its possible distribution in the coastal areas of China and preventing its invasion to other areas of China to cause aquaculture industry losses.
DAI Li , PAN Huakang , LIU Liyang , HE Jian , ZHAO Ke , QI Jianfei , ZHANG Zhen , SU Pei , FENG Danqing . Effects of environmental factors on larval settlement and metamorphosis of the fouling organism Mytilopsis sallei[J]. Journal of Tropical Oceanography, 2025 , 44(3) : 121 -129 . DOI: 10.11978/2024136
图5 沙筛贝幼体在不同光照强度下附着(a)、变态(b)及死亡(c)的情况(光照周期12L:12D)Fig. 5 Larval settlement (a), metamorphosis (b) and death (c) of M. sallei at different light intensities (light cycles 12L:12D) |
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