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https://hdl.handle.net/11681/25442| Title: | Habitat utilization by juvenile pink and chum salmon in Upper Resurrection Bay, Alaska |
| Authors: | Faurot, Mary W. Landino, Steve W. Reisenbichler, Reginald Ruben. Clarke, Douglas G. |
| Keywords: | Salmon--Pacific Coast (Alaska) Pink salmon--Ecology Chum salmon--Ecology Resurrection Bay (Alaska) |
| Publisher: | Environmental Laboratory (U.S.) U.S. Army Engineer Waterways Experiment Station. |
| Series/Report no.: | Technical Report;EL-89-17 |
| Abstract: | Patterns of habitat utilization by juvenile pink (Oncorhynchus gorbuscha) and chum (O. keta) salmon were studied in Resurrection Bay at a proposed small-boat harbor construction site near Seward, AK. Relative distribution and abundance of salmon fry and their predators were determined by beach seining during the outmigration period at six stations in upper Resurrection Bay; estuarine residence time of salmon fry was determined by otolith analysis; and predation on salmon fry and food habits of salmon fry were qualitatively assessed. The outmigration period lasted from mid-April through mid-May and peaked in the first week of May during both years of the study. Catches of salmon fry and their predators were highest at seine stations located in the proposed harb'or area. The most consistently occurring food items in stomachs of both pink and chum salmon were epibenthic harpacticoid copepods and planktonic calanoid copepods. Fry predators included Dolly Varden (Salvelinus malma), sculpin (Leptocottus spp. and Myoxocephalus spp.), and juvenile coho salmon (0. kisutch). Otoliths of juvenile pink and chum salmon exhibited daily growth increments, which were deposited after saltwater entry. Chum salmon (maximum age = 51 estuarine days, mean age = 11.8 days) remained in the study area much longer than pink salmon (maximum age = 18 estuarine days, mean age= 0.7 days). |
| URI: | http://hdl.handle.net/11681/25442 |
| Appears in Collections: | Technical Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| TR EL-89-17.pdf | 6.57 MB | Adobe PDF |  View/Open |