Habitat Segregation in Sanguinicolid Blood Flukes (Digenea) of Scorpaenid Rockfishes (Perciformes) on the Pacific Coast of North America

1971 ◽  
Vol 28 (6) ◽  
pp. 903-909 ◽  
Author(s):  
John C. Holmes
Keyword(s):  
Pacific Coast ◽  
Vancouver Island ◽  
Habitat Segregation ◽  
San Juan Islands ◽  
Blood Flukes ◽  
The Pacific ◽  
Concurrent Infections ◽  
Ventral Aorta ◽  
Inshore Waters ◽  
Branchial Arteries

Aporocotyle macfarlani Holmes, 1971, was found in five species of Sebastes taken from the inland waters around the San Juan Islands, Washington, or the inshore waters around Vancouver Island, B.C. Psettarium sebastodorum Holmes, 1971, was found in 14 species of Sebastes from the same locations or from deeper offshore waters west of Vancouver Island. The two flukes have different dominant hosts. Their numbers show different relations with depth. Aporocotyle macfarlani appears to be associated with fish that frequent reefs.Aporocotyle macfarlani occupies the lumen of the afferent branchial arteries, the ventral aorta, and rarely parts of the heart; P. sebastodorum is threaded into the intertrabecular spaces of the ventricle and atrium. The overlap in the distributions of the two species is reduced in concurrent infections.

A New Species of Bradyidius (Copepoda: Calanoida) from the Pacific Coast of North America

1966 ◽  
Vol 23 (6) ◽  
pp. 805-811 ◽  
Author(s):  
Tai Soo Park
Keyword(s):  
British Columbia ◽  
New Species ◽  
North America ◽  
Pacific Coast ◽  
Vancouver Island ◽  
Saanich Inlet ◽  
The Pacific ◽  
A New Species

A new species Bradyidius saanichi from Saanich Inlet, Vancouver Island, British Columbia, Canada, is described and illustrated in detail. This species is closely related to B. pacificus (Brodsky, 1950) among the six previously known species in the genus, but can be readily distinguished from the latter by the strongly divergent rostral rami in addition to some other differences.

scholarly journals The Punctual Bufflehead, Bucephala albeola: Autumn Arrivals in Shoal Harbour Sanctuary, Vancouver Island, in Relation to Freeze-up

2007 ◽  
Vol 121 (4) ◽  
pp. 370
Author(s):  
James K. Finley
Keyword(s):  
Pacific Coast ◽  
Climatic Variability ◽  
Vancouver Island ◽  
Migratory Bird ◽  
Minimal Cost ◽  
One Dimensional ◽  
The Pacific ◽  
Zero Degree ◽  
Good Proxy ◽  
Zero Degree Isotherm

Buffleheads are punctual in their return to wintering grounds on the Pacific coast. First arrivals appeared in Shoal Harbour Migratory Bird Sanctuary, southeastern Vancouver Island, on the 288th day of the year on average (± S.D. 2.3; n = 10), that is, 15 October. This vanguard preceded the first peak influx by about 15–20 days, and a second influx by about 24–26 days. First arrivals usually appeared by mid-morning, and included singles (females on two occasions) and small flocks of up to eight. First arrivals may represent a photoperiodic threshold, whereas subsequent peak influxes represent climatic thresholds associated with freeze-up. The phenology of Bufflehead autumn migrations is a good proxy indicator of the advance of the zero degree isotherm, and thus of climatic variability. The timing of their autumn migrations does not appear to have changed in the last half of the twentieth century, consistent with evidence that freeze-up has not advanced. Monitoring of their migrations, in conjunction with shore-based observations of freeze-up, would validate one-dimensional thermodynamic models of freeze-up, and provide a more ecologically meaningful index of climate change, at minimal cost.

scholarly journals Revision of sea anemone genus Epiactis (Coelenterata: Actiniaria) on the Pacific coast of North America, with descriptions of two new brooding species

1986 ◽  
Vol 64 (8) ◽  
pp. 1665-1674 ◽  
Author(s):  
Daphne Gail Fautin ◽  
Fu-Shiang Chia
Keyword(s):  
New Species ◽  
North America ◽  
Intertidal Zone ◽  
Type Species ◽  
Pacific Coast ◽  
Sea Anemone ◽  
Nominal Species ◽  
San Juan Islands ◽  
The Pacific ◽  
Two New Species

Two new species of the actiniid genus Epiactis, Epiactis lisbethae and Epiactis fernaldi, are described from the intertidal zone of the San Juan Islands, Washington, U.S.A. The sea anemone genus Cnidopus is synonymized with Epiactis, and its type species, C. ritteri, is restored to the genus in which it was originally described. Thus, four species of Epiactis are known on the Pacific coast of North America: external brooders E. prolifera (type species of the genus) and E. lisbethae, which differ in sexuality and brooding periodicity; and internal brooders E. ritteri and E. fernaldi, which differ in cnidae, sexuality, and histology. These bring the number of nominal species in the genus Epiactis to 19.

scholarly journals Signals of resilience and change in tidepool fish communities on the Pacific coast of Vancouver Island, Canada

2021 ◽  
Author(s):  
John M. Green ◽  
Robert L. Dunbrack ◽  
Amanda E. Bates
Keyword(s):  
Pacific Coast ◽  
Fish Communities ◽  
Vancouver Island ◽  
The Pacific

Range extensions of some northeastern Pacific nudibranch molluscs

1974 ◽  
Vol 52 (8) ◽  
pp. 989-992
Author(s):  
Gordon A. Robilliard
Keyword(s):  
British Columbia ◽  
Geographic Distribution ◽  
San Diego ◽  
Pacific Coast ◽  
Vancouver Island ◽  
Point Conception ◽  
The Pacific ◽  
Northeastern Pacific

The range of the nudibranch molluscs Archidoris odhneri, Cadlina luteomarginaia, and Dendronotus rufus has been extended northward to Auke Bay, Alaska, from Vancouver Island, British Columbia. The range of Archidoris montereyensis has been extended to Port Valdez, Alaska, from Sitka, Alaska, while that of Dirana aurantia and Coryphella fusca has been extended to Port Valdez from Vancouver Island. The range of Archidoris odhneri has also been extended southward to San Diego, California, from Point Conception, California. Large gaps in the geographic distribution of Triopha carpenteri and Dendronotus dalli were partially filled by observation of animals in southeastern Alaska. Finally, the distribution of Tochuina tetraquetra along the Pacific Coast is discussed.

Marine reptiles from the Nanaimo Group (Upper Cretaceous) of Vancouver Island

2002 ◽  
Vol 39 (11) ◽  
pp. 1591-1603 ◽  
Author(s):  
Elizabeth L Nicholls ◽  
Dirk Meckert
Keyword(s):  
British Columbia ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
New Genus ◽  
Pacific Coast ◽  
Vancouver Island ◽  
The Other ◽  
Western Interior Seaway ◽  
Marine Reptiles ◽  
The Pacific

A new fauna of fossil marine reptiles is described from the Late Cretaceous Nanaimo Group of Vancouver Island. The fossils are from the Haslam and Pender formations (upper Santonian) near Courtenay, British Columbia, and include elasmosaurid plesiosaurs, turtles, and mosasaurs. This is only the second fauna of Late Cretaceous marine reptiles known from the Pacific Coast, the other being from the Moreno Formation of California (Maastrichtian). The new Nanaimo Group fossils are some 15 million years older than those from the Moreno Formation. However, like the California fauna, there are no polycotylid plesiosaurs, and one of the mosasaurs is a new genus. This reinforces the provinciality of the Pacific faunas and their isolation from contemporaneous faunas in the Western Interior Seaway.

scholarly journals The first record of a trionychid turtle (Testudines: Trionychidae) from the Cretaceous of the Pacific Coast of North America

2018 ◽  
Vol 5 ◽  
Author(s):  
Matthew J. Vavrek ◽  
Donald B. Brinkman
Keyword(s):  
British Columbia ◽  
North America ◽  
Late Cretaceous ◽  
Rocky Mountains ◽  
Pacific Coast ◽  
First Record ◽  
Vancouver Island ◽  
The Pacific ◽  
Western Interior Basin ◽  
Cretaceous Deposits

Trionychid turtles were widespread throughout much of the Western Interior Basin of North America during the Cretaceous, represented by a wide variety of taxa. Despite their widespread abundance east of the Rocky Mountains, they have not previously been reported from Cretaceous deposits along the Pacific Coast of North America. We report here on an isolated trionychid costal from Vancouver Island, British Columbia. The fossil was recovered from the Late Cretaceous (Turonian to Maastrichtian) Nanaimo Group, on Vancouver Island, British Columbia. While the fossil is generically indeterminate, its presence adds an important datapoint in the biogeographic distribution of Trionychidae.  

Note on the occurrence of the marine turtle Desmatochelys (Reptilia: Chelonioidea) from the Upper Cretaceous of Vancouver Island

1992 ◽  
Vol 29 (2) ◽  
pp. 377-380 ◽  
Author(s):  
Elizabeth L. Nicholls
Keyword(s):  
Upper Cretaceous ◽  
Pacific Coast ◽  
Vancouver Island ◽  
Geographic Range ◽  
Marine Turtle ◽  
The Pacific ◽  
Marine Vertebrates

An incomplete specimen of Desmatochelys cf. D. lowi (Reptilia: Chelonioidea) from the Trent River Formation (Santonian–Campanian) of the Comox Basin of eastern Vancouver Island is the first documented account of Cretaceous marine vertebrates from the Pacific coast of Canada. It represents both stratigraphic and geographic range extensions for the genus Desmatochelys.

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