Redd Superimposition

By selecting spawning sites with optimal hydrologic characteristics, salmonids not infrequently superimpose redds.

Superimposition in progress
A few salmon eggs rising from stream sediment duing redd excation by a female Sockeye Salmon (Oncorhynchus nerka) from the superimposition in progress.
25Mile Creek Actinopterygii Alaska Chordata Class Actinopterygii Copper River Delta Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate chordate eggs female behavior redd excavation redd superimposition spawning spawning behavior superimposition underwater www.salmonography.com
Coho Salmon superimposition
This Coho Salmon (Oncorhynchus kisutch) female is superimposing her redd onto an existing one.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Sea Sea internal correction lens Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon www.salmonography.com
Sockeye Salmon superimposing
Female Sockeye Salmon (Oncorhynchus nerka) superimposing her redd onto an existing one.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon www.salmonography.com
Sockeye Salmon redd superimposition in progress
This female Sockeye Salmon (Oncorhynchus nerka) is creating a superimposition by excavating on an existing redd
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon www.salmonography.com
Sockeye Salmon redd superimposition in progress
This female Sockeye Salmon (Oncorhynchus nerka) is creating a superimposition by excavating on an existing redd
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon www.salmonography.com
Sockeye Salmon redd superimposition in progress
This female Sockeye Salmon (Oncorhynchus nerka) is creating a superimposition by excavating on an existing redd
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon www.salmonography.com
Redd excavation dynamics
With her alpha male guarding from a position just downstream and a spawned-out female guarding her redd upstream, a female Chum Salmon (Oncorhynchus keta) excavates her redd by turning sideways and making a radid body undulation.
Actinopterygii Alaska Alaska wild salmon Chordata Chum Salmon Class Actinopterygii Dog Salmon Fish Infraclass Teleostei Neopterygii Oncorhynchus keta Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate covering redd in situ naturalworld nature photographed under water spawning behavior underwater underwater photography underwaterphoto wild wild salmon www.salmonography.com
Female Coho Salmon superimposes her redd.
Previously spawned salmon eggs are suspened into the water column as this female Coho Salmon (Oncorhynchus kisutch) superimposes her redd.
Actinopterygii Alaska Alaska wild salmon Autumn Chordata Class Actinopterygii Coho Salmon Infraclass Teleostei Neopterygii Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate biosphere chordate digging excavating in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon www.salmonography.com
Superimposition
A female Sockeye Salmon (Oncorhynchus nerka) uses her anal fin to probe her redd. Loose eggs on the bottom and swirling about are due her having partially superimposed her redd onto an existing one. Underwater view in an Alaskan stream during the summer.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Summer Teleost Teleostei United States Vertebrate biosphere chordate covering redd in situ naturalworld nature spawning behavior underwater underwaterphoto wild wild salmon www.salmonography.com
Sockeye Salmon superimposing her redd onto an existing one
A female Sockeye Salmon (Oncorhynchus nerka) superimposing her redd onto an existing one causing developing eggs to be lost.
Actinopterygii Alaska Alaska wild salmon Chordata Class Actinopterygii Infraclass Teleostei Neopterygii Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon South Central Alaska Subclass Neopterygii Teleost Teleostei United States Vertebrate biosphere chordate in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon www.salmonography.com