Ecology and Conservation Graduate Program, Universidade Federal do Paraná, Brazil.
Zoology Department, Universidade Federal do Paraná, Brazil.
Mar Pollut Bull. 2022 Aug;181:113829. doi: 10.1016/j.marpolbul.2022.113829. Epub 2022 Jun 13.
Invasive, fouling species increase management costs and reduce mussel growth, which jeopardizes mariculture. We studied the distribution of eight invasive species in Santa Catarina, the leading mussel producer in Brazil. Our goals were to determine their spatial distribution and prevalence on farm structures (buoys, long lines, and mussel socks), as well as understand the relevance of propagule pressure (recruitment), port distance, and area of the farm in this distribution. Although present in all sites, adult and recruits distribution were spatially restricted, showing that species might have a metapopulation structure. The most prevalent species were the ascidian Styela plicata, the barnacle Megabalanus coccopoma, the bryozoan Schizoporella errata, and the polychaete Branchiomma luctuosum. Recruitment was the main driver of three species distribution while distance to port explained only one species distribution. Based on those results, we discuss policy options, management, and regulation enforcement, that can be used in the mussel aquaculture elsewhere.
入侵性、污损性物种会增加管理成本，降低贻贝生长速度，从而危及海水养殖业。我们研究了八种入侵物种在巴西贻贝主产区圣卡塔琳娜州的分布情况。我们的目标是确定它们在养殖场结构（浮标、长线和贻贝网袋）上的空间分布和流行程度，以及了解繁殖体压力（繁殖）、港口距离和养殖场面积在这种分布中的相关性。尽管这些物种在所有地点都存在，但成年个体和幼体的分布受到空间限制，表明这些物种可能具有复合种群结构。最常见的物种是海鞘 Styela plicata、藤壶 Megabalanus coccopoma、苔藓虫 Schizoporella errata 和多毛类 Branchiomma luctuosum。幼体繁殖是三种物种分布的主要驱动因素，而到港口的距离仅解释了一种物种的分布。基于这些结果，我们讨论了政策选择、管理和法规执行等方面的问题，这些问题可以在其他贻贝养殖场得到应用。
