Status and Trends

Reports & Publications

Effect of Species Rarity on the Accuracy of Species Distribution Models Status and Trends of the Nation's Biological Resources, vols. 1-2

Subtopics

Marine

Oceans & Seas Bays, Deltas & Estuaries Intertidal/Coastline Reefs

Fish

Diadromous Freshwater Saltwater

Related Subjects

Agricultural Practice (Impacts)

Threatened and Endangered Species

Fish+Marine
(Diadromous, Freshwater, and Saltwater) - Fish, aquatic vertebrates which are covered in scales and equipped with fins (paired and unpaired), are found in all types of aquatic environments ranging from freshwater to saltwater. Diadromous fish are those that travel between fresh and saltwater (Pacific salmon, for example, which is an anadromous fish that breeds in freshwater but lives in the sea, mostly). Monitoring the abundances of the prey fish populations is critical to managing the lake ecosystem. Presently, salmonines are stocked into the lake to supplement and sustain their populations within the lake.

Did You Know...?

Black Salty: Implications of survival of non-native live salt-water bait
The black salty is simply a variety of goldfish. Goldfish are non-native fishes from Asia that can disrupt natural habitats by interfering with feeding and reproduction of native fishes. Non-native fishes may compete with the young of game species that use estuaries as nurseries. Once a population of non-native fish is introduced and reproducing in a natural habitat, they are very difficult or impossible to eliminate.

24 Total Items

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Trophic coupling and habitat connectivity among coral reef, mangrove, and seagrass fishes and benthic invertebrate communities of the Virgin Islands National Park (VIIS) and Coral Reef National Monument (VICR)

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — The connection between fish habitat utilization, prey use, and fish movement patterns is not known in relation to available invertebrate prey resources in off-reef sites. Developing a better understanding of the habitat use, diet, and resource needs of benthic communities and their interactions with mobile fish and invertebrates is an important More...

Evaluation of Fish Movement and Water Velocities Near a Prototype Behavioral Guidance System at Lower Granite Dam

Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL

wfrc.usgs.gov — Since 1994, scientists from the Anadromous Fish Ecology Team have been assisting the U.S. Army Corps of Engineers (USACE) in evaluating the migration behavior and passage of juvenile salmon and steelhead through Lower Granite Reservoir and Dam on the Snake River, WA. The goal of this study is to identify the behavior of individual juvenile salmon More...

Xenobiotic Impact on Arctic Charr: Nutritional Modulation and Physiological Consequences

Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL

wfrc.usgs.gov — The Arctic charr (Salvelinus alpinus) in the northern most latitudes migrate to the ocean in the spring to feed and grow. This results in accumulation of polychlorinated biphenyls (PCB) in their visceral fat. During the winter, the charr reside in freshwater lakes and do not feed. They do mobilize lipids from adipose tissue for energy, which More...

Salinity Tolerance of Hemichromis letourneuxi

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — The African jewelfish (Hemichromis letourneuxi) has been established in canals surrounding the Miami area since the 1960s. With changes in water delivery to the park, the species has recently (2000) entered Everglades National Park and expanded its range westward through Big Cypress National Preserve. Simultaneously, African jewelfish from a More...

Evaluating the Role of Wetlands to Endangered Salmonids at Toppenish and Tualatin River National Wildlife Refuge

Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL

wfrc.usgs.gov — Threatened and endangered salmonids in the Pacific Northwest often use backwaters and wetlands as they migrate toward the ocean, however our understanding of the role of wetlands to juvenile salmonids is limited. The major Objective of this study was to determine whether juvenile steelhead were being tapped on the wetland during spring, and More...

Effects of salinity on survival, growth and reproduction of non-native Nile tilapia (Oreochromis niloticus) from southern Mississippi

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — The Nile tilapia (Oreochromis niloticus) is commonly used in aquaculture worldwide. Feral populations exist in many regions where individuals escape culture and establish in natural habitats. In Mississippi, Nile tilapia are established in at least three distinct localities (fig. 1): the lower Pascagoula and Escatawpa river drainages, and a More...

Low-temperature tolerance of African jewelfish, (Hemichromis letourneuxi)

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — Because the African jewelfish has a broad salinity tolerance, scientists tested how the species low-temperature tolerance varied at three salinities: freshwater (0 ppt), brackish (10 ppt) and marine (35 ppt) in the laboratory. A field experiment was then conducted to examine the survivorship of individuals when caged in several common aquatic More...

Building Experimental Capacity to Assess Ballast Treatment Effectiveness and Residual Risk

Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL

wfrc.usgs.gov — Ballast water discharges are the most significant cause of aquatic biological invasions in coastal waters, including the Great Lakes. Currently, treatment of ballast water prior to discharge at the receiving port offers significant promise to help control this problem. However, development of treatment technologies is limited by lack of objective More...

Science Support for Wetland Restoration in the Napa-Sonoma Salt Ponds

Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL

wfrc.usgs.gov — Over the past 150 years, land reclamation activities have resulted in loss of significant amounts of tidal marshes (sometimes referred to as inter-tidal wetlands, the estuarine zone that is alternately flooded and exposed) in San Francisco Bay and the Sacramento-San Joaquin Delta (Bay/Delta). Recently, in an effort to halt or reverse the decline More...

Epidemiology of Fish and Wildlife Diseases: Fish

Publisher: USGS | Science Center: Biological Informatics | Format: URL

biology.usgs.gov — This page links to samples of genetics and genomics research from the USGS Biological Resources Discipline about the epidemiology of fish diseases.

Genetic Analysis of Pacific Salmonids in the Northeast Pacific and the Russian Far East

Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL

wfrc.usgs.gov — This U.S./Russian collaboration will investigate genetics and life histories of Kamchatka Peninsula rainbow trout and steelhead (O. mykiss), and Dolly Varden, white-spotted, and arctic char (S. malma, S. leucomaensis, and S. alpinus, respectively). Both anadromous and resident forms of these generally occur in Kamchatka rivers that are free from More...

Nearshore Vertebrate Predator Project

Publisher: USGS (Biological Science Office) | Science Center: Alaska Science Center (ASC, Anchorage) | Format: URL

www.absc.usgs.gov — This project was designed to assess whether or not populations are recovering, whether isolated processes constrain recovery, and the potential activities to facilitate recovery. This web resource provides links to background information on Nearshore Vertebrate Predators, the Sea Otter, the Harlequin Duck, the River Otter, and the Pigeon More...