Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific
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 <i>Bathyraja</i> in the Russian waters of the Northwestern...
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MDPI AG
2022-12-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/12/24/3485 |
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| author | Alexei M. Orlov Igor V. Volvenko |
| author_facet | Alexei M. Orlov Igor V. Volvenko |
| author_sort | Alexei M. Orlov |
| collection | DOAJ |
| description | 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 <i>Bathyraja</i> in the Russian waters of the Northwestern Pacific (<i>B. violacea</i>, <i>B. aleutica</i>, <i>B. matsubarai</i>, <i>B. maculata</i>, <i>B. bergi</i>, <i>B. taranetzi</i>, <i>B. minispinosa</i>, <i>B. interrupta,</i> and <i>B. isotrachys</i>) 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. |
| first_indexed | 2024-03-09T17:25:29Z |
| format | Article |
| id | doaj.art-ea300fda02274fb199e3044e4fe40c74 |
| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-03-09T17:25:29Z |
| publishDate | 2022-12-01 |
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| record_format | Article |
| series | Animals |
| spelling | doaj.art-ea300fda02274fb199e3044e4fe40c742023-11-24T12:50:32ZengMDPI AGAnimals2076-26152022-12-011224348510.3390/ani12243485Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern PacificAlexei M. Orlov0Igor V. Volvenko1Laboratory of Oceanic Ichthyofauna, Shirshov Institute of Oceanology, Russian Academy of Sciences, 117218 Moscow, RussiaLaboratory for Modeling of Biological Processes, Pacific Branch of the Russian Federal Research Institute of Fisheries and Oceanography, 690091 Vladivostok, RussiaBased 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 <i>Bathyraja</i> in the Russian waters of the Northwestern Pacific (<i>B. violacea</i>, <i>B. aleutica</i>, <i>B. matsubarai</i>, <i>B. maculata</i>, <i>B. bergi</i>, <i>B. taranetzi</i>, <i>B. minispinosa</i>, <i>B. interrupta,</i> and <i>B. isotrachys</i>) 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.https://www.mdpi.com/2076-2615/12/24/3485spatial distributioncatch dynamicslatitudinal rangewestern Bering SeaSea of Okhotsknorthwestern Sea of Japan |
| spellingShingle | Alexei M. Orlov Igor V. Volvenko Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific Animals spatial distribution catch dynamics latitudinal range western Bering Sea Sea of Okhotsk northwestern Sea of Japan |
| title | Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific |
| title_full | Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific |
| title_fullStr | Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific |
| title_full_unstemmed | Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific |
| title_short | Long-Term Changes in the Distribution and Abundance of Nine Deep-Water Skates (Arhynchobatidae: Rajiformes: Chondrichthyes) in the Northwestern Pacific |
| title_sort | long term changes in the distribution and abundance of nine deep water skates arhynchobatidae rajiformes chondrichthyes in the northwestern pacific |
| topic | spatial distribution catch dynamics latitudinal range western Bering Sea Sea of Okhotsk northwestern Sea of Japan |
| url | https://www.mdpi.com/2076-2615/12/24/3485 |
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