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 fish behavior redd excavation redd superimposition spawning spawning behavior superimposition underwater
Coho Salmon superimposition
This Coho Salmon (Oncorhynchus kisutch) female is superimposing her redd onto an existing one.
Actinopterygii 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 Subclass Neopterygii Teleost Teleostei Vertebrate biosphere chordate fish behavior in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon
Sockeye Salmon superimposing
Female Sockeye Salmon (Oncorhynchus nerka) superimposing her redd onto an existing one.
Alaska wild salmon Class Actinopterygii Infraclass Teleostei Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon Subclass Neopterygii Summer Teleost Vertebrate biosphere fish behavior in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon
Sockeye Salmon redd superimposition in progress
This female Sockeye Salmon (Oncorhynchus nerka) is creating a superimposition by excavating on an existing redd
Alaska wild salmon Class Actinopterygii Infraclass Teleostei Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon Subclass Neopterygii Summer Teleost Vertebrate biosphere fish behavior in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon
Sockeye Salmon redd superimposition in progress
This female Sockeye Salmon (Oncorhynchus nerka) is creating a superimposition by excavating on an existing redd
Alaska wild salmon Class Actinopterygii Infraclass Teleostei Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon Subclass Neopterygii Summer Teleost Vertebrate biosphere fish behavior in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon
Sockeye Salmon redd superimposition in progress
This female Sockeye Salmon (Oncorhynchus nerka) is creating a superimposition by excavating on an existing redd
Alaska wild salmon Class Actinopterygii Infraclass Teleostei Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon Subclass Neopterygii Summer Teleost Vertebrate biosphere fish behavior in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon
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.
Alaska wild salmon Autumn Class Actinopterygii Coho Salmon Infraclass Teleostei Oncorhynchus kisutch Pacific salmon Phylum Chordata Salmonidae Salmoniformes Salmoninae Seacam underwater housing Silver Salmon Subclass Neopterygii Teleost Vertebrate biosphere digging excavating fish behavior in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon
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.
Alaska wild salmon Class Actinopterygii Infraclass Teleostei Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon Subclass Neopterygii Summer Teleost Vertebrate biosphere covering redd fish behavior in situ naturalworld nature spawning behavior underwater underwaterphoto wild wild salmon
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.
Alaska wild salmon Class Actinopterygii Infraclass Teleostei Oncorhynchus nerka Pacific salmon Phylum Chordata Red Salmon Salmonidae Salmoniformes Salmoninae Seacam underwater housing Sockeye Salmon Subclass Neopterygii Teleost Vertebrate biosphere fish behavior in situ naturalworld nature redd superimposition spawning spawning behavior superimposition underwater underwaterphoto wild wild salmon