caa a22 4500 477115586 CHVBK 20180405111621.0 cr unu---uuuuu 170330e19960701xx s 000 0 eng 10.1007/BF00004999 doi (NATIONALLICENCE)springer-10.1007/BF00004999 Persistence of egg pocket architecture in redds of chum salmon, Oncorhynchus keta [Elektronische Daten] [N. Peterson, Thomas Quinn] Synopsis: Analysis of frozen cores of gravel surrounding the egg pockets of chum salmon, Oncorhynchus keta, collected in the fall revealed that spawning activity by females purged about 75 % of the fine sediments from the stream bed. The egg pocket was one of four distinct vertical strata detected in the cores. There was an undisturbed layer below the egg pocket, and separate bridge and cover strata above the egg pocket, all defined by different particle size distributions. However, by spring most of the egg pockets had been infiltrated with fine sediment and the particle size distribution approached background levels. The most likely physical factors responsible for these results were: (1) intrusion of fine sediments through the cleaned surface gravel, (2) lateral subsurface migration of fine sediment into interstitial voids, (3) scour of the surface gravel and subsequent deposition of a sand rich bedload, and (4) superimposed spawning activity of other fish, causing disturbance of the cleaned surface gravel and exposing the egg pocket to intrusion of fine particles. We conclude that, while female salmon substantially affect the physical environment of their embryos, subsequent sediment transport processes and fine bedload flux tend to return this environment to pre-spawning conditions. Kluwer Academic Publishers, 1996 Egg burial nationallicence Hiding of eggs nationallicence Parental care nationallicence Sediment transport nationallicence Salmonids nationallicence Peterson N. School of Fisheries, University of Washington, 98195, Seattle, WA, U.S.A. aut Quinn Thomas School of Fisheries, University of Washington, 98195, Seattle, WA, U.S.A. aut Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 243-253 0378-1909 46:3<243 1996 46 10641 https://doi.org/10.1007/BF00004999 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00004999 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Peterson N. School of Fisheries, University of Washington, 98195, Seattle, WA, U.S.A aut NATIONALLICENCE 700 1- Quinn Thomas School of Fisheries, University of Washington, 98195, Seattle, WA, U.S.A aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers 46/3(1996-07-01), 243-253 0378-1909 46:3<243 1996 46 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer