Genetic mixture analyses in support of restoration of a high value recreational fishery for rainbow trout (Oncorhynchus mykiss) from a large lake in interior British Columbia

2019 ◽  
Vol 20 (4) ◽  
pp. 891-902
Author(s):  
Eric B. Taylor ◽  
Cody Foley ◽  
Matt Neufeld
Keyword(s):  
British Columbia ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Large Lake ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Recreational Fishery

Effects of rainbow trout (Oncorhynchus mykiss) on amphibians in productive recreational fishing lakes of British Columbia

2007 ◽  
Vol 64 (12) ◽  
pp. 1770-1780 ◽  
Author(s):  
Joanna Lynne McGarvie Hirner ◽  
Sean P Cox
Keyword(s):  
British Columbia ◽  
Rainbow Trout ◽  
Body Size ◽  
Oncorhynchus Mykiss ◽  
Relative Abundance ◽  
Amphibian Conservation ◽  
Recreational Fishing ◽  
Study Region ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Salamander Larvae

Stocking lakes with trout to enhance recreational fishing can negatively affect native aquatic species. Our objectives were (i) to compare presence, relative abundance, body size, and developmental stage of amphibians in lakes with and without rainbow trout (Oncorhynchus mykiss) in British Columbia’s southern interior, and (ii) to estimate the size of trout impact for application to amphibian conservation. Presence of long-toed salamander (Ambystoma macrodactylum), Columbia spotted frog (Rana luteiventris), and Pacific treefrog (Pseudacris regilla) was not significantly different between lake types. In contrast, western toad (Bufo boreas) larvae presence and relative abundance were significantly higher in lakes with trout. Relative abundance of salamander larvae was significantly lower in lakes with trout, but hypothesis testing did not provide consistent evidence of significantly lower abundances of spotted frog and treefrog larvae. However, estimated ratios of relative abundance (impact) indicated that larvae of the salamander and two frogs were ≥65% less abundant in lakes with trout. Salamander larvae were significantly smaller in lakes with trout. Although amphibians may currently coexist with trout in our study region, trout stocking policy in British Columbia should consider amphibian conservation because the presence of trout is associated with lower amphibian abundance and body size in individual lakes.

scholarly journals Ecotypic differentiation of native rainbow trout (Oncorhynchus mykiss) populations from British Columbia

2005 ◽  
Vol 62 (7) ◽  
pp. 1523-1539 ◽  
Author(s):  
E R Keeley ◽  
E A Parkinson ◽  
E B Taylor
Keyword(s):  
British Columbia ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Large Scale ◽  
Spatial Scales ◽  
Morphological Differentiation ◽  
Predictive Ability ◽  
Geographic Area ◽  
Ecotypic Differentiation ◽  
Rainbow Trout Oncorhynchus Mykiss

We sampled 34 native rainbow trout (Oncorhynchus mykiss) populations over a wide geographic area of British Columbia to determine whether variation in morphology is related to differences in habitat or fish community characteristics experienced by a population. After correcting for differences in body size, the most dramatic differences occurred in external characteristics between stream- and lake-dwelling populations. Rainbow trout from streams had more robust bodies with larger caudal peduncles and heads and longer paired fins than rainbow trout from lakes. Unlike other lake populations, piscivorous rainbow trout populations had relatively large heads and mouths that were more similar in size to those of stream-dwelling populations. We found fewer differences in the size of internal organs across ecotypes, producing little predictive ability of these characteristics to differentiate populations of rainbow trout. We also sampled 27 additional rainbow trout populations with unknown fish communities to determine how well large-scale patterns predict morphological differentiation over a smaller spatial scale. Of the five ecotypes that we detected at a smaller scale, the largest differences again occurred between stream and lake populations. Our data suggest that external morphological variation among populations of rainbow trout covaries with ecological conditions at a variety of spatial scales, particularly between lakes and rivers.

Lepeophtheirus cuneifer Kabata, 1974 (Copepoda: Caligidae) from seawater-reared rainbow trout, Oncorhynchus mykiss, and Atlantic salmon, Salmo salar, in the Strait of Georgia, British Columbia, Canada

1991 ◽  
Vol 69 (5) ◽  
pp. 1414-1416 ◽  
Author(s):  
S. C. Johnson ◽  
L. J. Albright
Keyword(s):  
British Columbia ◽  
Rainbow Trout ◽  
Atlantic Salmon ◽  
Oncorhynchus Mykiss ◽  
Salmo Salar ◽  
Strait Of Georgia ◽  
Atlantic Salmon Salmo Salar ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Important Parasite

Adults, preadults, and chalimus larvae of Lepeophtheirus cuneifer were recovered from rainbow trout, Oncorhynchus mykiss, and Atlantic salmon, Salmo salar, cultured in seawater in the southern Strait of Georgia, British Columbia. This species has not been reported previously from these hosts or in Canadian waters. It was found only in low abundance and is not an economically important parasite of farmed salmonids in British Columbia.

Cryopreservation of rainbow trout(Oncorhynchus mykiss)Blastomeres

1993 ◽  
Vol 6 (1) ◽  
pp. 77-80 ◽  
Author(s):  
Eric Nilsson ◽  
Joseph G. Cloud
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Rainbow Trout Oncorhynchus Mykiss

The essential oils of some medicinal plants on the immune system of rainbow trout (Oncorhynchus mykiss)

Planta Medica ◽  
2012 ◽  
Vol 78 (11) ◽  
Author(s):  
A Ghasemi Pirbalouti ◽  
E Pirali ◽  
G Pishkar ◽  
S Mohammadali Jalali ◽  
M Reyesi ◽  
...  
Keyword(s):  
Immune System ◽  
Rainbow Trout ◽  
Medicinal Plants ◽  
Oncorhynchus Mykiss ◽  
Essential Oils ◽  
Rainbow Trout Oncorhynchus Mykiss

Nuclear distribution of genotoxic damage in rainbow trout (Oncorhynchus mykiss) sperm after cryopreservation

2014 ◽  
Author(s):  
Silvia Gonzalez-Rojo ◽  
Cristina Fernandez-Diez ◽  
Marta Lombo ◽  
Vanesa Robles Rodriguez ◽  
Herraez Maria Paz
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Genotoxic Damage ◽  
Nuclear Distribution ◽  
Rainbow Trout Oncorhynchus Mykiss
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