Orlov Alexei M, Volvenko Igor V
Laboratory of Oceanic Ichthyofauna, Shirshov Institute of Oceanology, Russian Academy of Sciences, 117218 Moscow, Russia.
Laboratory of Behavior of Lower Vertebrates, A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 119071 Moscow, Russia.
Animals (Basel). 2022 Dec 9;12(24):3485. doi: 10.3390/ani12243485.
Based on the analysis of long-term data from bottom trawl surveys (1977-2021), changes in the spatial distribution, position of the boundaries of the ranges and the catch rates of the nine most common deep-sea skates of the genus in the Russian waters of the Northwestern Pacific (, , , , , , , and ) are considered. During the surveyed period, significant changes in the spatial distribution were observed, which are probably due to both subjective reasons (changes in the number of trawling stations, surveyed depths, etc.) and climatic changes. No monotonous displacement of the northern or southern boundaries of the range or its center in one direction was observed in any area of any species during the entire observation period. At the same time, shifts in the boundaries of the ranges of different species in different areas occurred for different decades, i.e., the boundaries of the ranges slowly fluctuated or "pulsed" near some average annual position. In general, from the 1970s to the 1980s, the number of skates grew; from the 1980s to the 1990s, it decreased; from the 1990s to the 2000s, it fluctuated at the achieved level; from the 2000s to the 2010s, it grew again; and from the 2010s to the 2020s, it decreased again. These trends coincide with previously identified ecosystem rearrangements under the influence of climatic and oceanological changes. The identification of links between changes in spatial distribution, range boundaries and catch rates with climatic and oceanological factors require separate additional studies.
基于对底拖网调查(1977 - 2021年)长期数据的分析,研究了西北太平洋俄罗斯海域(、、、、、、、和)九种最常见的深海鳐属鱼类的空间分布变化、分布范围边界位置以及捕捞率变化。在调查期间,观察到空间分布有显著变化,这可能是由于主观原因(拖网站数量、调查深度变化等)以及气候变化所致。在整个观察期内,任何物种的任何区域均未观察到分布范围的北部或南部边界或其中心向一个方向的单调位移。与此同时,不同区域不同物种分布范围的边界在不同十年间发生了变化,即分布范围的边界在某个年均位置附近缓慢波动或“脉动”。总体而言,从20世纪70年代到80年代,鳐鱼数量增加;从80年代到90年代,数量减少;从90年代到21世纪初,数量在达到的水平上波动;从21世纪初到2010年代,数量再次增加;从2010年代到2020年代,数量又再次减少。这些趋势与先前确定的受气候和海洋学变化影响的生态系统重新排列相吻合。确定空间分布、分布范围边界和捕捞率变化与气候和海洋学因素之间的联系需要单独进行额外研究。