Infestation ofSalmincola californiensis(Copepoda: Lernaeopodidae) in Wild Coho Salmon, Steelhead, and Coastal Cutthroat Trout Juveniles in a Small Columbia River Tributary

2003 ◽  
Vol 132 (5) ◽  
pp. 1027-1032 ◽  
Author(s):  
Scott Barndt ◽  
Jen Stone
Keyword(s):  
Coho Salmon ◽  
Cutthroat Trout ◽  
Columbia River ◽  
Coastal Cutthroat Trout

scholarly journals Evaluating Coexistence of Fish Species with Coastal Cutthroat Trout in Low Order Streams of Western Oregon and Washington, USA

Fishes ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 4
Author(s):  
Kyle D. Martens ◽  
Jason Dunham
Keyword(s):  
Pacific Northwest ◽  
Species Interactions ◽  
Coho Salmon ◽  
Cutthroat Trout ◽  
Single Species ◽  
The Pacific ◽  
Small Streams ◽  
Coastal Cutthroat Trout ◽  
Multiple Species ◽  
Low Order

When multiple species of fish coexist there are a host of potential ways through which they may interact, yet there is often a strong focus on studies of single species without considering these interactions. For example, many studies of forestry–stream interactions in the Pacific Northwest have focused solely on the most prevalent species: Coastal cutthroat trout. To examine the potential for interactions of other fishes with coastal cutthroat trout, we conducted an analysis of 281 sites in low order streams located on Washington’s Olympic Peninsula and along the central Oregon coast. Coastal cutthroat trout and juvenile coho salmon were the most commonly found salmonid species within these streams and exhibited positive associations with each other for both presence and density. Steelhead were negatively associated with the presence of coastal cutthroat trout as well as with coho salmon and sculpins (Cottidae). Coastal cutthroat trout most frequently shared streams with juvenile coho salmon. For densities of these co-occurring species, associations between these two species were relatively weak compared to the strong influences of physical stream conditions (size and gradient), suggesting that physical conditions may have more of an influence on density than species interactions. Collectively, our analysis, along with a review of findings from prior field and laboratory studies, suggests that the net effect of interactions between coastal cutthroat trout and coho salmon do not appear to inhibit their presence or densities in small streams along the Pacific Northwest.

Effects of increasing winter rearing habitat on abundance of salmonids in two coastal Oregon streams

2000 ◽  
Vol 57 (5) ◽  
pp. 906-914 ◽  
Author(s):  
M F Solazzi ◽  
T E Nickelson ◽  
S L Johnson ◽  
J D Rodgers
Keyword(s):  
Coho Salmon ◽  
Woody Debris ◽  
Cutthroat Trout ◽  
Stream Habitat ◽  
Oncorhynchus Clarki ◽  
Winter Habitat ◽  
Coastal Cutthroat Trout ◽  
Posttreatment Period ◽  
Complex Habitat ◽  
Downstream Migrant

We used a BACI (before-after-control-impact) experimental design to examine the effects of increasing winter habitat on the abundance of downstream migrant salmonids. Two reference streams and two treatment streams were selected in the Alsea and Nestucca basins of Oregon. Population parameters for juvenile coho salmon (Oncorhynchus kisutch), age-0 trout (Oncorhynchus spp.), steelhead (Oncorhynchus mykiss), and coastal cutthroat trout (Oncorhynchus clarki) were estimated each year for 8 years in each stream. Stream habitat was modified to increase the quality and quantity of winter habitat during the summers of 1990 (Nestucca Basin) and 1991 (Alsea Basin). Complex habitat was constructed by adding large woody debris to newly created alcoves and dammed pools. Numbers of coho salmon summer juveniles and smolts increased in the treatment streams relative to the control streams during the posttreatment period. Overwinter survival of juvenile coho salmon also increased significantly in both treatment streams posttreatment. Summer trout populations in the treatment streams did not change, but downstream migrant numbers the following spring did increase. These increases suggest that winter habitat was limiting abundance of all three species.

Status, Distribution, and Conservation of Native Freshwater Fishes of Western North America

2007 ◽  
Keyword(s):  
Sockeye Salmon ◽  
Coho Salmon ◽  
Pink Salmon ◽  
Cutthroat Trout ◽  
Columbia River ◽  
Species List ◽  
The Pacific ◽  
Prosopium Williamsoni ◽  
Catostomus Macrocheilus ◽  
Lewis And Clark

ABSTRACT The Lewis and Clark expedition crossed the Continental Divide in 1805 on the way west to the Pacific Ocean. Based on journal entries, members of the expedition probably encountered two species of resident salmonids and four of the six species of anadromous salmonids and steelhead (Family Salmonidae, genus <em>Oncorhynchus</em>). The salmonid species were called common salmon (now known as Chinook salmon <em>O. tshawytscha</em>), red charr (sockeye salmon <em>O. nerka</em>), white salmon trout (coho salmon [also known as silver salmon] <em>O. kisutch</em>), salmon trout (steelhead <em>O. mykiss</em>), and spotted trout (cutthroat trout <em>O. clarkii</em>). There was no evidence of the expedition encountering pink salmon <em>O. gorbuscha</em>, chum salmon <em>O. keta</em>, or species of true char <em>Salvelinus</em> spp. Common fishes procured from Indian tribes living along the lower Columbia River included eulachon <em>Thaleichthys pacificus</em> and white sturgeon <em>Acipenser transmontanus</em>. The identity of three additional resident freshwater species is questionable. Available descriptions suggest that what they called mullet were largescale sucker <em>Catostomus macrocheilus</em>, and that chubb were peamouth <em>Mylocheilus caurinus</em>. The third questionable fish, which they called bottlenose, was probably mountain whitefish <em>Prosopium williamsoni</em>, although there is no evidence that the species was observed in the Columbia River drainage. Missing from the species list were more than 20 other fishes known to Sahaptin-speaking people from the mid-Columbia region. More complete documentation of the icthyofauna of the Pacific Northwest region did not occur until the latter half of the 19th century. However, journals from the Lewis and Clark expedition provide the first documentation of Columbia River fishes.

Evidence of Panmixia between Sympatric Life History Forms of Coastal Cutthroat Trout in Two Lower Columbia River Tributaries

2010 ◽  
Vol 30 (3) ◽  
pp. 691-701 ◽  
Author(s):  
Jeffrey R. Johnson ◽  
Jason Baumsteiger ◽  
Joseph Zydlewski ◽  
J. Michael Hudson ◽  
William Ardren
Keyword(s):  
Life History ◽  
Cutthroat Trout ◽  
Columbia River ◽  
Coastal Cutthroat Trout

Declines of Juvenile Coastal Cutthroat Trout and Coho Salmon over Fifteen Years in a Salmon-Bearing Stream in the Salish Sea

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
Anne-Marie Flores ◽  
Morgan M. Davies ◽  
Katrina Kushneryk ◽  
Pippi T.E.S. Lawn ◽  
Sibylla Helms ◽  
...  
Keyword(s):  
Coho Salmon ◽  
Cutthroat Trout ◽  
Salish Sea ◽  
Coastal Cutthroat Trout

Effects of an increase in large wood on abundance and survival of juvenile salmonids (Oncorhynchus spp.) in an Oregon coastal stream

2005 ◽  
Vol 62 (2) ◽  
pp. 412-424 ◽  
Author(s):  
Steven L Johnson ◽  
Jeffrey D Rodgers ◽  
Mario F Solazzi ◽  
Thomas E Nickelson
Keyword(s):  
Habitat Restoration ◽  
Coho Salmon ◽  
Cutthroat Trout ◽  
Time Frame ◽  
Oncorhynchus Clarki ◽  
Large Wood ◽  
Winter Storm ◽  
Oncorhynchus Clarki Clarki ◽  
Coastal Cutthroat Trout ◽  
Reference Stream

We examined the effect of an increase in large wood on the summer population size, smolt abundance, and freshwater survival of steelhead (Oncorhynchus mykiss), coastal cutthroat trout (Oncorhynchus clarki clarki), and coho salmon (Oncorhynchus kisutch). We examined these parameters for five brood years prior to the addition of wood and five brood years after in Tenmile Creek, a direct ocean tributary on the Oregon coast. Over the same time frame, a nearby reference stream, Cummins Creek, was also sampled for the same parameters. The input of large wood into Tenmile Creek resulted from a planned habitat restoration project in 1996 and an unplanned addition of wood from a winter storm the same year. Steelhead smolt abundance, steelhead freshwater survival, and coho salmon freshwater survival increased in Tenmile Creek after the input of large wood. Steelhead age-0+ summer populations and steelhead smolt populations increased in the reference stream, although steelhead freshwater survival did not. Coho salmon populations remained unchanged in the reference stream. Our results illustrate the potential shortcomings of the before-after-control-impact study design under field conditions and the potential for misinterpreting results had we employed a more modest sampling plan.

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