Few studies examined species or ecosystem dynamics on seamounts/banks. The Galicia Bank (GB), the deepest marine Special Area of Conservation in the Spanish Natura 2000 network, is considered a conservation priority because of its highly vulnerable habitats, such as cold-water and bamboo corals. The biological conditions and population structure of benthopelagic shrimps and their relationship with environmental conditions were analyzed during three expeditions over three years. Shrimps were collected by trawling. The gonadosomatic index (GSI) and nutritional condition (hepatosomatic index [HSI]) of shrimps were highest at the summit and deepest depths (>1500 m) sampled, whereas at intermediate depths between ca. 900–1500 m, these values were low. The intermediate depths around ca. 1000 m are influenced by the core of the Mediterranean Outflow Water (MOW), which is characterized by high salinity and low O₂ concentrations. The highest GSI were recorded in species (Aristeus antennatus, Plesionika martia) distributed at summit, associated with higher Chl a 1–2 months before sampling at surface. The species with the highest HSI were also linked to Chl a 1–2 months and with higher %OM (generalized additive models, GAM, results). Overall, the studied shrimp species showed viable populations on GB, with reproductors/spawners more markedly distributed over the summit (ca. <900 m). Notably, reproductors of several important commercial species (A. antennatus, P. martia) reached larger sizes and had greater potential fecundity (GSI) than in their optimal distribution areas, out of GB. P. martia recruitment only occurred in 2010, a year characterized by highly negative North Atlantic Oscillation (NAO) indices (−5.96/−5.2), suggesting that benthopelagic shrimps may colonize the GB at a variable periodicity as a probable consequence of the variable availability of zooplankton prey over seamounts. At the same time, species such as Aristaeopsis edwardsiana and P. martia may have some advantages when colonizing habitats in the GB because of the absence of competition from similar, even congeneric species. This was reflected in the patterns of size-depth distribution in the GB compared to mainland areas. In conclusion, the habitats of the GB and, by extension, of seamounts/banks contain rather isolated and small sub-populations, yet these populations can have a reservoir effect that can contribute to eventually restoring the main population core in other areas.

很少有研究检查海山/河岸的物种或生态系统动态。加利西亚银行（GB）是西班牙Natura 2000网络中最深的海洋特别保护区，因其高度脆弱的栖息地（例如冷水和竹珊瑚）而被视为一项保护重点。在三年的三次考察中，分析了远洋虾的生物学条件，种群结构及其与环境条件的关系。通过拖网收集虾。虾的性腺体激素指数（GSI）和营养状况（肝体指数[HSI]）在最高峰和最深深度（> 1500 m）处最高，而在ca之间的中间深度。900-1500 m，这些值很低。ca周围的中间深度。1000 m受地中海流出水（MOW）核心的影响，其特征是高盐度和低O ₂浓度。最高GSI记录在物种（Aristeus antennatus，Plesionika martia首脑分布，具有更高的叶绿素相关联）一个在表面采样前1-2个月。具有最高HSI的物种也与Chl在1-2个月内联系在一起，并且具有较高的％OM（广义加性模型，GAM，结果）。总体而言，所研究的虾种在GB上显示出可行的种群，繁殖者/产卵者在山顶（约<900 m）上分布更为明显。值得注意的是，几个重要商业物种的繁殖者（A. antennatus，P. martia）达到更大的尺寸，比他们的最优分配方面有更大的潜力繁殖力（GSI），执行GB的。马氏疟原虫的募集仅发生在2010年，这一年的特征是北大西洋涛动指数（−5.96 / −5.2）极低，这表明底栖虾可能以可变的周期定居在GB上，这是可变可用性的可能结果。浮游生物捕食海山。同时，诸如Aristaeopsis edwardsiana和P. martia的物种在GB的栖息地定居时，由于缺乏来自相似物种甚至同类物种的竞争，可能具有某些优势。与大陆地区相比，这在GB的大小深度分布模式中得到了反映。总之，GB的栖息地以及扩展的海山/河岸的栖息地都包含相当孤立的小种群，但是这些种群具有蓄水效应，最终有助于恢复其他地区的主要种群核心。