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- Title
Taxonomic Diversity of Fish Species in the Lower Reaches of the Yellow River.
- Authors
Sun, Lufeng; Li, Xiuqi; Dong, Guancang; Cong, Xuri
- Abstract
Simple Summary: Due to the lack of water resources in the lower reaches of the Yellow River, the abundance of fish resources could be higher, and background research on fishes is rare. The current status of downstream fishery resources can be clarified by investigating fish resources in the lower Yellow River in the past four years. A total of 54 fish species were found in the downstream waters during the survey, with the recovery of populations and abundance of major economic fish, common small-sized fish, and endangered fish. By comparing and analyzing the current status of fish resources in various downstream survey sections, it was found that the confluence of Dongping Lake into the Yellow River has the highest number of fish species, which means that this water area is the most essential habitat for fish in the lower Yellow River. To protect downstream fishery resources, key protection measures should be taken for this habitat in the future. In order to study the community of fishery resources, five sampling sections were set up in the lower Yellow River from 2019 to 2022 to investigate the diversity of fishery resources. A total of 54 fish species were identified in the survey, belonging to 9 orders, 19 families, and 48 genera. The number of species reached its highest level since the Integrated Water Regulation of the Lower Yellow River in 1999. The original rare and endangered fish species in the lower reaches of the Yellow River, such as Coilia nasus, Rhinogobio nasutus, and Pseudobagrus ussuriensis, have reappeared in the lower reaches. The population and abundance of main economic fish and common small-sized fish in the lower reaches of the Yellow River have increased. These signs all indicate that, and the fishery resources are recovering slowly in the lower Yellow River. By comparing the fish resources of various investigation sections, it was found that there are differences in fish diversity: the closer to the estuarine waters, the higher the variety of fish in the Yellow River at the upper level of the taxonomic category. However, that section of the lower Yellow River where species evenness, species diversity, and community structure of fishery resources were most stable was the confluence of Dongping Lake into the Yellow River, which has the most significant number of fish species, the smallest Λ+ value, and the most extensive G-F index. The above results indicate that Dongping Lake, as the only lake connected to the lower reaches of the Yellow River, plays an essential role in replenishing fish resources in the lower reaches of the Yellow River.
- Subjects
SPECIES diversity; FISHERY resources; FISH diversity; RARE fishes; NUMBERS of species; WATER supply
- Publication
Fishes (MDPI AG), 2023, Vol 8, Issue 10, p503
- ISSN
2410-3888
- Publication type
Article
- DOI
10.3390/fishes8100503