concept

anadromous fish

Also known as: anadromous fish, anadromous fishes

Facts (14)

Sources

A review of climate change impacts on migration patterns of marine ... frontiersin.org Frontiers Oct 25, 2024 14 facts

claimMost seabirds are highly philopatric to colony breeding sites, and certain anadromous fishes have site-specific and inflexible migration patterns to freshwater breeding sites.

claimMigration patterns of nearshore foragers and anadromous fishes are potentially affected by changes in riverine and coastal systems, including freshwater runoff, thawing terrestrial permafrost, retreating glaciers, increased sedimentation, and a lack of shore-fast ice.

claimThe most abundant anadromous fishes in the Arctic include members of the sub-family Salmoninae (Pacific salmon, Atlantic salmon, sea trout, and char) and members of the Coregoninae (whitefishes and ciscoes).

claimIn Arctic and Subarctic regions, migratory fishes are categorized into two types: anadromous fishes, which hatch in fresh water, migrate to the ocean, and return to freshwater to reproduce, and strictly marine fishes, which complete their entire life cycle in the ocean.

claimSea ice and cold water act as physical barriers to the movement of anadromous fishes.

claimAnadromous and marine fishes, certain marine mammals, and at least three species of seabirds exhibit resident migration patterns within Subarctic or Arctic areas.

claimAnadromous fishes are generally limited to occupying water temperatures above -0.7°C because they lack antifreeze compounds such as glycoproteins, according to Cheng (2009).

claimWarming environments are impacting the ability of Indigenous coastal communities in Arctic North America, Greenland, and eastern Eurasia to engage in traditional harvests by altering the spatiotemporal patterns of migratory marine mammals, seabirds, and anadromous fishes.

claimThe lifestyles of Indigenous coastal communities in Arctic North America, Greenland, and eastern Eurasia are closely associated with seasonal sea ice, and their traditional harvests are being impacted by a warming environment that alters the spatiotemporal patterns of migratory marine mammals, seabirds, and anadromous fishes.

claimThe distribution of zooplankton, pelagic and benthic invertebrates, and forage fishes influences the migration patterns of upper trophic level vertebrates, including seabirds, marine mammals, and anadromous fishes.

claimWarmer water temperatures have caused northward expansions of both anadromous and marine ectothermic fish species, as documented by Dunmall et al. (2024), Haug et al. (2017), and Baker (2021).

claimResident species in Subarctic or Arctic areas spend most or all of their life cycle within those regions but exhibit regular movements within those areas, a pattern observed in some anadromous and marine fishes, certain marine mammals, and at least three species of seabirds.

claimIncreased Arctic air temperatures have caused earlier spring ice melt, which determines when anadromous fish begin their marine feeding migration to utilize seasonal ocean productivity, according to Cooley et al. (2020) and Falardeau et al. (2022).

claimIn western Arctic North America, Inuit harvests of seals and anadromous fishes have been impacted by climate change.