The Effect of Salmon Carcasses on Alaskan Freshwaters

1997 ◽  
pp. 179-204 ◽  
Author(s):  
Thomas C. Kline ◽  
John J. Goering ◽  
Robert J. Piorkowski
Keyword(s):  
Salmon Carcasses

Effects of salmon carcasses on experimental stream ecosystems in Hokkaido, Japan

2005 ◽  
Vol 20 (4) ◽  
pp. 471-480 ◽  
Author(s):  
Seiji Yanai ◽  
Kaori Kochi
Keyword(s):  
Stream Ecosystems ◽  
Salmon Carcasses ◽  
Experimental Stream

scholarly journals Beavers, Castor canadensis, Feeding on Salmon Carcasses: Opportunistic Use of a Seasonally Superabundant Food Source

2005 ◽  
Vol 119 (4) ◽  
pp. 591 ◽  
Author(s):  
Jeffrey S. Gleason ◽  
Ryan A. Hoffman ◽  
James M. Wendland
Keyword(s):  
Chinook Salmon ◽  
Food Source ◽  
Oncorhynchus Tshawytscha ◽  
Foraging Ecology ◽  
Castor Canadensis ◽  
The Other ◽  
Streams And Rivers ◽  
Southcentral Alaska ◽  
Common Strategy ◽  
Salmon Carcasses

We report observations of Beavers (Castor canadensis) foraging and feeding on discarded Chinook Salmon (Oncorhynchus tshawytscha) carcasses within the confines of the Susitna River drainage in southcentral Alaska on three separate occasions between 1999 and 2004. In all three instances, Beavers were observed actively seeking out freshly discarded carcasses or transporting “fresh” salmon carcasses in their mouths. In one instance, Beavers were seen using their dextrous forefeet to “handle” chunks of salmon while hunched over carcasses and in this case we actually witnessed Beavers “chewing” and ingestion was assumed. In the other two instances, Beavers were observed swimming with salmon carcasses in their mouths. Though unique within the framework of Beaver foraging ecology, we suggest this behavior may be a fairly common strategy employed by Beavers in Alaskan streams and rivers to take advantage of a seasonally superabundant source of protein.

Nutrients in Salmonid Ecosystems: Sustaining Production and Biodiversity

2003 ◽  
Keyword(s):  
Ecosystem Function ◽  
Fish Populations ◽  
Alternative Methods ◽  
Ecosystem Productivity ◽  
Ecosystem Recovery ◽  
Current Management ◽  
Stream Flows ◽  
Riparian Habitats ◽  
Productivity Potential ◽  
Salmon Carcasses

<em>Abstract.</em>—Based on the information presented at the Restoring Nutrients to Salmonid Ecosystems conference in Eugene, Oregon, in April of 2001, it will be necessary to substantially increase and achieve salmon spawner escapement goals in order to meet ecosystem productivity potential. Modeling of recovery rates shows that achievement of even the currently identified spawner escapement goals (much less ecosystem recovery) in less than 50–100 years is unlikely, unless there are substantial shifts in management thought and practice. To speed recovery, it is necessary to achieve consistent rates of increase in spawning escapement not seen in current management activities. Until actual spawner escapements approach levels necessary to support ecosystem function, it will be necessary to utilize alternative methods such as the distribution of salmon carcasses, carcass analogs, or the use of fertilizer to provide the nutrients needed to assist its salmonid population recovery. In addition to restoring absolute numbers, the size and age structures of the fish populations need to be restored in order to successfully utilize the available environment. Simply increasing escapements and resultant nutrient levels, however, is insufficient. Stream flows, whether average, flood, or low, need to be stabilized. Instream and riparian habitats need to be stabilized and restored; this would include allowing normal flood paths to be followed.

Marine Subsidies in Freshwater: Effects of Salmon Carcasses on Lipid Class and Fatty Acid Composition of Juvenile Coho Salmon

2004 ◽  
Vol 133 (3) ◽  
pp. 559-567 ◽  
Author(s):  
Ron A. Heintz ◽  
Bonita D. Nelson ◽  
John Hudson ◽  
Marie Larsen ◽  
Larry Holland ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Lipid Class ◽  
Acid Composition ◽  
Coho Salmon ◽  
Marine Subsidies ◽  
Salmon Carcasses

The ecology of terrestrial invertebrates on Pacific salmon carcasses

2009 ◽  
Vol 24 (5) ◽  
pp. 1091-1100 ◽  
Author(s):  
Morgan D. Hocking ◽  
Richard A. Ring ◽  
Thomas E. Reimchen
Keyword(s):  
Pacific Salmon ◽  
Terrestrial Invertebrates ◽  
Salmon Carcasses

Pacific Salmon Carcasses: Essential Contributions of Nutrients and Energy for Aquatic and Terrestrial Ecosystems

Fisheries ◽  
1999 ◽  
Vol 24 (10) ◽  
pp. 6-15 ◽  
Author(s):  
C. Jeff Cederholm ◽  
Matt D. Kunze ◽  
Takeshi Murota ◽  
Atuhiro Sibatani
Keyword(s):  
Pacific Salmon ◽  
Terrestrial Ecosystems ◽  
Salmon Carcasses

The Isopod Mesidotea entomon in the Chignik Lakes, Alaska

1968 ◽  
Vol 25 (1) ◽  
pp. 157-167 ◽  
Author(s):  
David W. Narver
Keyword(s):  
Late Summer ◽  
River System ◽  
Early Summer ◽  
Unit Increase ◽  
Average Fecundity ◽  
Salmon Carcasses

Studies on the isopod Mesidotea entomon (Linnaeus) from 1961 to 1964 in the two Chignik lakes, Alaska, showed that at least part of the population was benthic during daylight and pelagial at night. In Chignik Lake the isopod was most abundant in association with organic and mud bottoms and areas where salmon carcasses accumulate. Abundance decreased from early to late summer, perhaps because of a postreproductive mortality. It is suggested that males grow faster than females, though both sexes mature at age I+ and that growth terminates with maturation. Most reproduction apparently occurs in early summer but some ovigerous females were found as late as September. Length at maturity in both sexes was less than reported by other workers in Arctic marine populations. Mature isopods were smaller in the upper lake (males 40–46 mm, [Formula: see text]; and females 29–38 mm, [Formula: see text]) than in the lower lake (males 41–65, [Formula: see text]; and females 29–47 mm, [Formula: see text]) of the Chignik River system. Females in the upper lake had a higher average fecundity and a greater increase in fecundity per unit increase of length than those in the lower lake.

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