当前位置: X-MOL 学术J. Sea Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Reproductive plasticity in the invasive -Xenostrobus securis (Bivalvia: Mytiloidea) in northwestern Spain
Journal of Sea Research ( IF 2 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.seares.2020.101893
Agar Montes , Celia Olabarria , Elsa Vázquez

Abstract The invasive mussel Xenostrobus securis was first recorded from Galicia (NW Spain) in 2007, within an area characterized by the commercial culture of Mytilus galloprovincialis. This study investigated the spatial variability in reproduction of X. securis at three adjacent locations over a period of twelve months and the temporal variation at one location over two consecutive years. This is the first such study conducted outside its native range and in which the influences of temperature and salinity on the reproductive cycle were also tested. The invader exhibited rapid gametogenesis, accumulation of mature gametes and an extended spawning period interspersed with gonad recovery, without resting periods. The onset of gametogenesis varied both spatial and temporally, starting 15-days later at the innermost location than at the outermost one. Such spatial variability resulted in an almost continuous breeding season (10 months), in contrast to the 7–8 months observed in the native range. Although the spatial variability in maturation and spawning in the native location is mainly attributable to variations in salinity, the variability in the Ria de Vigo was probably caused by temperature acting as a trigger for maturation and spawning. The almost continuous breeding season exhibited by X. securis potentially results in planktotrophic larvae being present in the water column for almost 10 months of the year. The reproductive plasticity of X. securis and the potential to adapt to local environmental conditions highlight the need for specific monitoring programmes focused on early detection in potential invasion hotspots.

中文翻译:

西班牙西北部侵入性 -Xenostrobus securis(双壳类:Mytiloidea)的生殖可塑性

摘要 侵入性贻贝 Xenostrobus securis 于 2007 年首次在加利西亚(西班牙西北部)被记录到,该地区以 Mytilus galloprovincialis 的商业养殖为特征。本研究调查了十二个月内在三个相邻位置的 X. securis 繁殖的空间变异性和连续两年在一个位置的时间变化。这是第一次在其原生范围之外进行的此类研究,其中还测试了温度和盐度对生殖周期的影响。入侵者表现出快速的配子发生、成熟配子的积累和延长的产卵期,散布着性腺恢复,没有休息期。配子发生的开始在空间和时间上都不同,从最里面的位置比最外面的位置晚 15 天开始。这种空间变异导致几乎连续的繁殖季节(10 个月),与在原生范围观察到的 7-8 个月形成鲜明对比。尽管本地成熟和产卵的空间变异主要归因于盐度的变化,但 Ria de Vigo 的变异可能是由温度作为成熟和产卵的触发因素引起的。X. securis 表现出的几乎连续的繁殖季节可能导致浮游营养幼虫在一年中的近 10 个月内都存在于水体中。X 的生殖可塑性。
更新日期:2020-04-01
down
wechat
bug