Catalog Number: USNM 76734
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): A. Sowerby
Locality: Yalu R., China, China, Asia
Amur River Demersal Habitat
This taxon is one of a number of demersal species in the Amur River system. Demersal river fish are found at the river bottom, feeding on benthos and zooplankton
The persistence of mercury contamination in Amur River bottom sediments is a major issue, arising from historic cinnabar mining in the basin and poor waste management practises, especially in the communist Soviet era, where industrial development was placed ahead of sound conservation practises.
The largest native demersal fish species in the Amur River is the 560 centimeter (cm) long kaluga (Huso dauricus); demersal biota are those that inhabit the bottom of a surface water body. Another large demersal fish found in the Amur is the 300 cm Amur sturgeon (Acipenser schrenckii), a taxon which is endemic to the Amur basin.
Other demersal endemic fish species (all in the concubitae family) of the Amur Basin are Iksookimia longicorpa, I. koreensis, I. hugowolfeldi, Cobitis melanoleuca melanoleuca and the Puan spine loach (Iksookimia pumila).
Columbia River Demersal Habitat
This taxon is one of a number of demersal species in the Columbia River system. Demersal river fish are found at the river bottom, feeding on benthos and zooplankton. The Columbia River is the largest North American watercourse by volume that discharges to the Pacific Ocean. With headwaters at Columbia Lake, in Canadian British Columbia, the course of the river has a length of approximately 2000 kilometers and a drainage basin that includes most of the land area of Washington, Oregon and Idaho as well as parts of four other U.S. states and two Canadian provinces.
The Columbia River Basin of northwestern North America is an important habitat for Acipenser transmontanus. The Columbia River is the largest North American watercourse by volume that discharges to the Pacific Ocean. With headwaters at Columbia Lake, in Canadian British Columbia, the course of the river has a length of approximately 2000 kilometers and a drainage basin that includes most of the land area of Washington, Oregon and Idaho as well as parts of four other U.S. states and two Canadian provinces.
The hydrology and aquatic habitat of the Columbia River basin has been adversely altered by numerous large dams. There are over 250 reservoirs and around 150 hydroelectric projects in the basin, including 18 mainstem dams on the Columbia and its main tributary, the Snake River.
Water quality in the Columbia River has deteriorated over the last century, due to agricultural runoff and logging practices, as well as water diversions that tend to concentrate pollutants in the reduced water volume. For example nitrate levels in the Columbia generally tripled in the period from the mid 1960s to the mid 1980s, increasing from a typical level of one to three milligrams per liter. Considerable loading of herbicides and pesticides also has occurred over the last 70 years, chiefly due to agricultural land conversion and emphasis upon maximizing crop yields.
Heavy metal concentrations in sediment and in fish tissue had become an issue in the latter half of the twentieth century; however, considerable progress has been made beginning in the 1980s with implementation of provisions of the U.S.Clean Water Act, involving attention to smelter and paper mill discharges along the Columbia.
Some large demersal fish species occurring in the Columbia Basin are the 610 centimeter (cm) white sturgeon (Acipenser transmontanus), the 76 cm Pacific lamprey (Lampetra tridentata); the 55 cm Brown bullhead (Ameiurus nebolosus); the 61 cm largescale sucker (Catostomus macrocheilus); the 64 cm longnose sucker (Catostomus catostomus catostomus); and the 65 cm Utah sucker (Catostomus ardens).
Habitat and Ecology
Depth range (m): 2 - 2
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Molecular Biology and Genetics
Barcode data: Rhinogobius brunneus
No available public DNA sequences.
Download FASTA File
Statistics of barcoding coverage: Rhinogobius brunneus
Public Records: 16
Specimens with Barcodes: 16
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria