Temperature and salinity tolerances of embryos and larvae of the deep-sea mytilid mussel "Bathymodiolus" childressi
Temperature and salinity tolerances of embryos and larvae of the deep-sea mytilid mussel "Bathymodiolus" childressi
复制标题
DOI：
10.1007/s00227-011-1749-9
复制
发表时间：
2011-11-01
期刊：
影响因子：
2.4
通讯作者：
Young, Craig M.
中科院分区：
文献类型：
--
作者：
Arellano, Shawn M.;Young, Craig M.
我们检查了深海冷渗贻贝“Bathymodiolus”childressi早期胚胎和幼虫阶段的温度和盐度耐受性，以确定它们是否可以控制幼虫的扩散深度。随着发育阶段的增加，耐盐性和耐温性逐渐增强，但“B”幼虫的耐盐性和耐温性较差。“childressi，以及相关的浅水贻贝Mytilus trossulus的幼虫。B组发育正常。“childressi从7至15A摄氏度和盐度的35和45。更大的“B”公差。“将胚胎培育到高盐度环境中可能有助于早期胚胎在盐水渗漏时负浮力的发育。尽管“B”组的生存率呈下降趋势。“childressi幼虫随着温度的升高，存活率“B。“在20摄氏度的环境温度下，childressi trochophores与成人的环境温度没有显着差异。由于幼虫容忍不断上升的温度，因为他们的年龄和海水温度在100米深不超过20 A摄氏度的几个月后的贻贝的产卵季节，我们建议，温度不会限制垂直迁移的面盘幼虫的“B。“childressi甚至进入最上层的水柱以上的寒冷渗透在墨西哥湾。
We examined temperature and salinity tolerances of early embryonic and larval stages of the deep-sea, cold-seep mussel "Bathymodiolus" childressi to determine whether they may control the dispersal depth of larvae. Salinity and temperature tolerances increased with developmental stage, but tolerance ranges were not as wide for the larvae of "B." childressi as for the larvae of the related shallow-water mussel Mytilus trossulus. Normal development occurred in "B." childressi from 7 to 15A degrees C and at salinities of 35 and 45. Greater tolerance of "B." childressi embryos to high than low salinities may aid development of negatively buoyant early embryos at brine seeps. Although there was a decreasing trend in survival of "B." childressi larvae with increasing temperature, survival of "B." childressi trochophores was not significantly different at 20A degrees C than at the adults' ambient temperature. Since larvae tolerate increasing temperatures as they age and seawater temperatures at 100 m depth do not exceed 20A degrees C in months following the mussels' spawning season, we suggest that temperature would not limit vertical migration of the veliger larvae of "B." childressi into even the uppermost layer of the water column above the cold seeps in the Gulf of Mexico.