The ecology of blood parasites in blue grouse from Vancouver Island, British Columbia

1980 ◽  
Vol 58 (12) ◽  
pp. 2175-2186 ◽  
Author(s):  
Norman A. Williams ◽  
Jerome L. Mahrt ◽  
Fred C. Zwickel
Keyword(s):  
British Columbia ◽  
Competitive Exclusion ◽  
Single Species ◽  
Common Species ◽  
Vancouver Island ◽  
Blood Parasites ◽  
Age Classes ◽  
Experimental Transmission ◽  
Dendragapus Obscurus ◽  
Multiple Species

The blood parasites in blue grouse (Dendragapus obscurus (Say, 1823)) from Vancouver Island, British Columbia were studied during the summers of 1972 through 1975. Data from 1707 birds of three age-classes indicated that infections of Leucocytozoon bonasae occurred more often (79%) than Trypanosoma avium (54%), Haemoproteus mansoni (42%), or microfilariae (37%). Concurrent associations of these taxa were more common (77%) than single species infections. Frequencies of multiple species infections did not fit expected probabilities, indicating that multiple associations are not derived independently.Young grouse acquire L. bonasae and H. mansoni by middle to late June, 2–3 weeks after hatching. Infections of T. avium and microfilariae appeared 4 and 5–9 weeks after hatch, respectively. Leucocytozoon and Haemoproteus had two transmission periods which varied seasonally among years, but which had similar within-year patterns. Simulium aureum was incriminated as a vector of L. bonasae, but attempts at experimental transmission were not made. The utilization of common species of vectors by several taxa of parasites is postulated. Competitive exclusion does not appear to exist for this species assemblage.

Differences in the gonadal cycles of adult and yearling blue grouse

1979 ◽  
Vol 57 (6) ◽  
pp. 1283-1289 ◽  
Author(s):  
S. J. Hannon ◽  
B. R. Simard ◽  
F. C. Zwickel ◽  
J. F. Bendell
Keyword(s):  
British Columbia ◽  
Social Interaction ◽  
Reproductive Organs ◽  
Vancouver Island ◽  
Dendragapus Obscurus ◽  
Lower Volume ◽  
Viable Sperm ◽  
Sexually Mature

Gonadal cycles of adult and yearling female and male blue grouse (Dendragapus obscurus fuliginosus) collected from Vancouver Island, British Columbia, are described and compared. Reproductive organs of yearling females develop later, produce eggs at a lower oviduct weight, and regress faster to a lower oviduct weight than do those of adults. Yearling males, although most do not breed, go through the entire gonadal cycle and produce viable sperm. Testes of yearlings develop later, have a lower volume, and regress earlier than those of adults. Yearlings of both sexes appear less sexually mature than adults, but delays in or lack of breeding could be partly a result of social interaction with resident adults.

The plainfin midshipman’s soundscape at two sites around Vancouver Island, British Columbia

2018 ◽  
Vol 603 ◽  
pp. 189-200 ◽  
Author(s):  
WD Halliday ◽  
MK Pine ◽  
APH Bose ◽  
S Balshine ◽  
F Juanes
Keyword(s):  
British Columbia ◽  
Vancouver Island

scholarly journals Best practices on the differential expression analysis of multi-species RNA-seq

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Matthew Chung ◽  
Vincent M. Bruno ◽  
David A. Rasko ◽  
Christina A. Cuomo ◽  
José F. Muñoz ◽  
...  
Keyword(s):  
Best Practices ◽  
Differential Expression ◽  
Expression Analysis ◽  
Differential Expression Analysis ◽  
Single Species ◽  
Rna Seq ◽  
Species Analysis ◽  
Differential Gene ◽  
Multiple Species ◽  
Downstream Analysis

AbstractAdvances in transcriptome sequencing allow for simultaneous interrogation of differentially expressed genes from multiple species originating from a single RNA sample, termed dual or multi-species transcriptomics. Compared to single-species differential expression analysis, the design of multi-species differential expression experiments must account for the relative abundances of each organism of interest within the sample, often requiring enrichment methods and yielding differences in total read counts across samples. The analysis of multi-species transcriptomics datasets requires modifications to the alignment, quantification, and downstream analysis steps compared to the single-species analysis pipelines. We describe best practices for multi-species transcriptomics and differential gene expression.

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.

scholarly journals A rare genotype of Cryptococcus gattii caused the cryptococcosis outbreak on Vancouver Island (British Columbia, Canada)

2004 ◽  
Vol 101 (49) ◽  
pp. 17258-17263 ◽  
Author(s):  
S. E. Kidd ◽  
F. Hagen ◽  
R. L. Tscharke ◽  
M. Huynh ◽  
K. H. Bartlett ◽  
...  
Keyword(s):  
British Columbia ◽  
Vancouver Island ◽  
Cryptococcus Gattii

Eutardigrada from Vancouver Island, British Columbia, Canada, including a description of Platicrista cheleusis n.sp.

1990 ◽  
Vol 68 (9) ◽  
pp. 1880-1895 ◽  
Author(s):  
R. Deedee Kathman
Keyword(s):  
British Columbia ◽  
Vancouver Island

Thirty-one species of eutardigrades were collected on five mountains on Vancouver Island, British Columbia, during July 1986 and July 1987. Three of the species found were new to science, including 1 species, Platicrista cheleusis n.sp., described herein and 2 species described elsewhere, and 21 others are new to British Columbia; 13 of these are also new to Canada.

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