About: Pre-spawn mortality in coho salmon

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Pre-spawn mortality is a phenomenon where adult coho salmon, Oncorhynchus kisutch, die before spawning when returning to freshwater streams to spawn. It is also known as Urban Runoff Mortality Syndrome in more recent studies. This occurrence has been observed in much of the Puget Sound region of the Pacific Northwest. During fall migration, salmonids (trout and salmon) pass through urban watersheds which are contaminated with stormwater runoff. As the coho salmon pass through these waters, many will show symptoms of lethargy, loss of equilibrium and disorientation, and die within a few hours of showing these symptoms. These symptoms and behaviors are prevalent after rain events. Mortality often occurs before salmon have the opportunity to spawn, which is determined by cutting open female c

Attributes	Values
rdf:type	disease
rdfs:label	Pre-spawn mortality in coho salmon (en)
rdfs:comment	Pre-spawn mortality is a phenomenon where adult coho salmon, Oncorhynchus kisutch, die before spawning when returning to freshwater streams to spawn. It is also known as Urban Runoff Mortality Syndrome in more recent studies. This occurrence has been observed in much of the Puget Sound region of the Pacific Northwest. During fall migration, salmonids (trout and salmon) pass through urban watersheds which are contaminated with stormwater runoff. As the coho salmon pass through these waters, many will show symptoms of lethargy, loss of equilibrium and disorientation, and die within a few hours of showing these symptoms. These symptoms and behaviors are prevalent after rain events. Mortality often occurs before salmon have the opportunity to spawn, which is determined by cutting open female c (en)
dcterms:subject	Salmon
Wikipage page ID	39536402 (xsd:integer)
Wikipage revision ID	1095743145 (xsd:integer)
Link from a Wikipage to another Wikipage	Cadmium Puget Sound Barium Salmon Pathogens Carcinogenic Sockeye salmon Protoplasm Pesticides Salmon run Cobalt Fraser River Copper Zinc Pectoral fin Bristol Bay Cations Mode of action 6PPD Aluminum Fossil fuels Nickel (disambiguation) Pacific Northwest Chromium Iron (disambiguation) Fertilizers Rainbow trout Arsenic Chinook salmon Lead (disambiguation) Bioretention Biotic Ligand Model Swale (landform) Coho salmon Toxicity Olfactory toxicity in fish Spawn (biology) Green roofs Insecticides Klamath River Metals Impervious surfaces Low-impact development (UK) Nonpoint source pollution Pervious concrete Stormwater runoff Olfactory Polycyclic aromatic hydrocarbons Salmonids Sealants Anadromous fish Rain gardens
sameAs	Pre-spawn mortality in coho salmon Pre-spawn mortality in coho salmon Pre-spawn mortality in coho salmon
dbp:wikiPageUsesTemplate	dbt:Reflist dbt:Salmon
has abstract	Pre-spawn mortality is a phenomenon where adult coho salmon, Oncorhynchus kisutch, die before spawning when returning to freshwater streams to spawn. It is also known as Urban Runoff Mortality Syndrome in more recent studies. This occurrence has been observed in much of the Puget Sound region of the Pacific Northwest. During fall migration, salmonids (trout and salmon) pass through urban watersheds which are contaminated with stormwater runoff. As the coho salmon pass through these waters, many will show symptoms of lethargy, loss of equilibrium and disorientation, and die within a few hours of showing these symptoms. These symptoms and behaviors are prevalent after rain events. Mortality often occurs before salmon have the opportunity to spawn, which is determined by cutting open female carcasses and observing for unfertilized eggs. Rates of pre-spawn mortality could impact the local salmon populations. Based on model projections, if rates continue, populations of coho salmon could become extinct within the next few decades. Weight of evidence suggests coho salmon pre-spawn mortality is due to exposure to stormwater runoff, although the exact contaminant or mixture that is responsible remains unknown. A negative correlation exists between the incidence of pre-spawn mortality and urban land use, specifically with the impervious surfaces, commercial property type, and local roads. Exposure to metals and petroleum hydrocarbons displayed some response to pre-spawn mortality, while exposure to pesticides, diseases, and water quality variables did not elicit this effect. This trend has not been observed in any other life history stage of the coho salmon nor in other salmon species in the Puget Sound region. (en)
gold:hypernym	Phenomenon
prov:wasDerivedFrom	wikipedia-en:Pre-spawn_mortality_in_coho_salmon?oldid=1095743145&ns=0
page length (characters) of wiki page	19638 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Pre-spawn_mortality_in_coho_salmon
is Link from a Wikipage to another Wikipage of	Salmon run Coho salmon Olfactory toxicity in fish Pre-spawn Mortality in Coho Salmon Pre-spawn Mortality in Coho Salmon (Oncorhynchus kisutch)
is Wikipage redirect of	Pre-spawn Mortality in Coho Salmon Pre-spawn Mortality in Coho Salmon (Oncorhynchus kisutch)
is foaf:primaryTopic of	wikipedia-en:Pre-spawn_mortality_in_coho_salmon

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