Distribution of Cryptobia salmositica, a haemoflagellate of fishes, in British Columbia and the seasonal pattern of infection in a coastal river

1984 ◽  
Vol 62 (12) ◽  
pp. 2512-2518 ◽  
Author(s):  
Susan M. Bower ◽  
L. Margolis
Keyword(s):  
British Columbia ◽  
Seasonal Pattern ◽  
Cutthroat Trout ◽  
Late Summer ◽  
Host Record ◽  
Vancouver Island ◽  
Yukon Territory ◽  
Intensity Of Infection ◽  
New Host ◽  
Coastal River

A survey of adult Pacific salmon (Oncorhynchus spp.) from 1981 to 1983, along with other observations, demonstrated that in British Columbia Cryptobia salmositica was confined to tributaries of the Fraser River, coastal rivers adjacent to this river, and rivers on Vancouver Island. Adult salmon from the Queen Charlotte Islands and the Bella Coola, Skeena, and Nass rivers in British Columbia and the Yukon River in the Yukon Territory were not infected. The distribution of C. salmositica may be explained by events of the Wisconsin glacial and postglacial periods. Seasonal variability in prevalence and intensity of infection of C. salmositica in the Big Qualicum River, a coastal river on Vancouver Island, is related to the seasonal return of adult salmon in late summer and autumn, and the concomitant increase in abundance of the leech vector, Piscicola salmositica. Prevalence and intensity of infection in juvenile salmonids in this river also increased during autumn. Cryptobia salmositica was present in resident sculpins (Cottus aleuticus) throughout the year; however, the prevalence did not begin to increase until December, coincident with the postspawning decline in salmon numbers in the river. The finding of C. salmositica in cutthroat trout (Salmo clarki) from the Big Qualicum River constitutes a new host record.

Ogmogaster antarcticus Johnston, 1931 (Trematoda: Notocotylidae) from the bowhead whale, Balaena mysticetus L., at Barrow, Alaska

1979 ◽  
Vol 57 (6) ◽  
pp. 1347-1348 ◽  
Author(s):  
Larry M. Shults
Keyword(s):  
British Columbia ◽  
Geographic Distribution ◽  
Host Record ◽  
Bowhead Whale ◽  
Balaena Mysticetus ◽  
New Host ◽  
New Host Record

One specimen of the trematode Ogmogaster antarcticus Johnston, 1931 was recovered from a sample of bowhead whale ingesta collected at Barrow, Alaska. This represents a new host record and extends the known geographic distribution of this helminth some 5000 km by sea north of British Columbia, Canada.

A Statistical Examination of Anisakis Larvae (Nematoda) in Herring (Clupea pallasi) of the British Columbia Coast

1955 ◽  
Vol 12 (4) ◽  
pp. 571-592 ◽  
Author(s):  
Yvonne M. M. Bishop ◽  
Leo Margolis
Keyword(s):  
British Columbia ◽  
West Coast ◽  
Maximum Level ◽  
Vancouver Island ◽  
First Year ◽  
Intensity Of Infection ◽  
The West ◽  
Strait Of Georgia ◽  
Clupea Pallasi ◽  
First Year Of Life

The presence of larval Anisakis in British Columbia herring was examined during the winter fisheries of 1950–51 and 1951–52. In the commercial catches in the Strait of Georgia the incidence was found to be between 80 and 90%. In Hecate Strait, on the west coast of Vancouver Island and in the mainland coastal area of Queen Charlotte Sound it was between 90 and 100%. The intensity of infection varied greatly in different fishing areas (i.e. in different herring populations). Generally, the maximum level of infection occurred in the Queen Charlotte Sound coastal regions, and decreased both north and south of this area. Fish on the west coast of Vancouver Island were more heavily infected than those on the east coast (Strait of Georgia). The level of infection increased with age, I-year fish (i.e. fish in their first year of life) being uninfected. The intensity of infection remained constant throughout the winter for any particular age and area and was the same for both sexes. In most areas the level of infection was a little lower in 1951–52 than in 1950–51.

scholarly journals Influence of Temperature, Light Intensity, and Isolate on the Development of Neofusicoccum parvum–Induced Dieback of Eugenia, Syzygium paniculatum

Plant Disease ◽  
2009 ◽  
Vol 93 (8) ◽  
pp. 804-808 ◽  
Author(s):  
Randy C. Ploetz ◽  
Jose M. Pérez-Martínez ◽  
Aaron J. Palmateer ◽  
Tara L. Tarnowski
Keyword(s):  
Late Summer ◽  
Host Record ◽  
South Florida ◽  
Seasonal Development ◽  
New Host ◽  
Neofusicoccum Parvum ◽  
Hurricane Wilma ◽  
New Host Record ◽  
Wide Range ◽  
Vascular Discoloration

Syzygium paniculatum (Myrtaceae) is an important plant in the South Florida ornamental industry. Known as eugenia in the trade, the plant was relatively free of diseases before Hurricane Wilma (2005). Since then, a serious dieback disease has become prevalent in local nurseries, especially during late summer. Symptoms included wilting and death of terminal and lateral branches, and vascular discoloration in dead and dying branches and the main stem. Several fungi were isolated from diseased plants, but Neofusicoccum parvum was usually the only fungus isolated from symptomatic tissue. Most isolates were sterile, but all that were tested produced significant (P < 0.05) dieback on, and reduced growth of, the cultivar Monterrey Bay. Glomerella spp. and a Pestalotiopsis sp. that were recovered from asymptomatic portions of diseased plants and Mycoleptodiscus terrestris recovered from healthy liners of Monterrey Bay did not cause dieback symptoms in pathogenicity studies or affect host growth. In incubator studies, N. parvum caused significant external symptoms, vascular discoloration, and mortality at 25 and 30°C; in general, only vascular symptoms developed at 20°C and no symptoms developed at 15°C. Thus, temperature may be associated with the seasonal development of this disease. Significant differences in disease development were not observed under a wide range of light intensities (2,000 to 300 μmol s-1 m-2). S. paniculatum is a new host record for N. parvum.

Cystacanths of Bolbosoma vasculosum in the black scabbard fish Aphanopus carbo, oceanic horse mackerel Trachurus picturatus and common dolphin Delphinus delphis from Madeira, Portugal

2000 ◽  
Vol 74 (2) ◽  
pp. 113-120 ◽  
Author(s):  
G. Costa ◽  
J.C. Chubb ◽  
C.J. Veltkamp
Keyword(s):  
Geographic Location ◽  
Host Record ◽  
Horse Mackerel ◽  
Fish Length ◽  
Common Dolphin ◽  
Connective Tissues ◽  
Intensity Of Infection ◽  
New Host ◽  
Delphinus Delphis ◽  
New Host Record

AbstractCystacanths of the acanthocephalan, Bolbosoma vasculosum Rudolphi 1819, were found to be encapsulated in the connective tissues of the viscera of the black scabbard fish, Aphanopus carbo and oceanic horse mackerel, Trachurus picturatusfrom Madeira, Atlantic Ocean. Juvenile worms were obtained from the intestine of a stranded common dolphin, Delphinus delphis, also from Madeira. Cystacanths were 11–15 mm long, with a proboscis of 18–19 longitudinal rows, eight hooks per row, and two sets of trunk spines. Overall, the morphology and dimensions of the proboscis, neck and trunk corresponded to previous descriptions. Scanning electron microscopy of the proboscis structures and trunk spines is provided for the first time. The prevalence of B. vasculosum in A. carbo increased with fish length. There were no statistical differences in the prevalence and intensity of infection between seasons. The intensity of infection was similar for male and female fishes, but there were significant differences in relation to length, longer fishes having heavier infections. Aphanopus carbo from Madeira represents a new host record and a new geographic location for B. vasculosum.

A seasonal study of the parasites of the red-winged blackbird (Agelaius phoeniceus L.) in Manitoba and Arkansas

1980 ◽  
Vol 58 (4) ◽  
pp. 528-537 ◽  
Author(s):  
Deborah E. Hood ◽  
H. E. Welch
Keyword(s):  
Seasonal Pattern ◽  
Host Record ◽  
Breeding Site ◽  
Agelaius Phoeniceus ◽  
Breeding Period ◽  
New Host ◽  
Animal Food ◽  
Feather Mite ◽  
New Host Record ◽  
New Host Records

Examination of 223 red-winged blackbirds revealed seven trematodes of which Zonorchis petiolatum, Leucochloridium macrostomum, Tanaisia (Tamerlania) zarudnyi, and Tanaisia (Tanaisia) fedtschenkoi are new host records; three cestodes of which Anomotaenia sp. is a new host record; and six nematodes of which Dispharynx nasuta, Diplotriaena bargusinica, and Tetrameres sp. are new host records. Only one acanthocephalan, Mediorhynchus grandis, and three blood protozoa were found. Two protozoa, Parahaemoproteus (= Haemoproteus) orizivora and Plasmodium vaughani, are new host records. The 12 ectoparasites included two new host records, Ceratophyllus garei and Sternostoma tracheacolum. Four nonparasitic organisms were recovered, none of which have been reported associated with this bird.The most common parasites were the trematode Plagiorchis noblei, the louse Brüelia sp., and the feather mite Proctophyllodes egglestoni. Each showed a characteristic seasonal pattern. Ectoparasites were most abundant prior to host breeding, and endoparasites during the host breeding period. Ten species of parasites were ubiquitous according to Dogiel's classification, nine were breeding-site or northern parasites, three were probably migratory, and eight were wintering or southern parasites. Eight other species were tentatively classified according to Dogiel's system, and one species could not be classified.The highest intake of animal food by the host coincided with the peak of endoparasitism.

Ceratomyxa shasta (Myxosporida) Disease in Chum Salmon (Oncorhynchus keta) in British Columbia

1975 ◽  
Vol 32 (9) ◽  
pp. 1640-1643 ◽  
Author(s):  
L. Margolis ◽  
T. P. T. Evelyn
Keyword(s):  
British Columbia ◽  
Chum Salmon ◽  
Coho Salmon ◽  
Host Record ◽  
Oncorhynchus Keta ◽  
New Host ◽  
Chum Salmon Oncorhynchus Keta ◽  
New Host Record ◽  
Natural Range ◽  
Juvenile Chum Salmon

Infections with the myxosporidan Ceratomyxa shasta Noble, 1950 were confirmed in four juvenile chum salmon (Oncorhynchus keta) caught at sea near Nanaimo in 1965 and 1968. These cases represent a new host record for C. shasta and a northward extension of the parasite’s known natural range. Ceratomyxosis was also presumptively diagnosed in a coho salmon (Oncorhynchus kisutch) in British Columbia.

scholarly journals Digenetic trematodes of the Subfamily Aphanurinae Skrjabin & Guschanskaja, 1954 infecting the commercially important fish Thryssa malabarica (Bloch, 1795) (Clupeiformes, Engraulidae) from the brackishwater bodies of Kerala, India

2019 ◽  
Vol 6 (14) ◽  
pp. 591-597
Author(s):  
Puthiya Veettil Nisha ◽  
Puthanpurayil Kandambeth Prasadan
Keyword(s):  
Maximum Level ◽  
Host Record ◽  
Infection Prevalence ◽  
Intensity Of Infection ◽  
New Host ◽  
New Host Record ◽  
Digenetic Trematodes ◽  
The Family ◽  
Commercially Important ◽  
Characteristic Features

Three species of digenetic trematodes of the Family Hemiuridae Looss, 1899, Subfamily Aphanurinae Skrjabin & Guschanskaja, 1954 with their prevalence, intensity of infection and mean abundance are reported Aphanuroides lethrini, Aphanurus stossichii and Aphanurus tuberculatus. A total of 26 specimens of Thryssa malabarica (Bloch, 1795) were examined for digenean infection. Prevalence of infection of A. lethrini, A. stossichii and A. tuberculatus were 11.53%, 69.23% and 15.38%, respectively, the intensity of infection were 1.6, 3.1 and 2.5 and the mean abundance were 0.19, 2.15 and 0.38, respectively. The prevalence, intensity and mean abundance of infection were at the maximum level in A. stossichii infection. Recovery of these parasites from T. malabarica represents a new host record and the first report from Kerala. The characteristic features of the recovered digeneans are discussed.

Notes on some parasitic fungi from southern British Columbia, southwest Alberta, and adjacent United States

1976 ◽  
Vol 54 (9) ◽  
pp. 971-975 ◽  
Author(s):  
D. B.O. Savile
Keyword(s):  
United States ◽  
British Columbia ◽  
Vancouver Island ◽  
Type Locality ◽  
Distichlis Spicata ◽  
New Host ◽  
Parasitic Fungi

New host and geographic records are given for various fungi. The following are included: Uromyces peckianus ssp. verruculosus ssp. nov. on Distichlis spicata. Vancouver Island; Exobasidium phyllodoces comb. nov. on Phylloduce empetriformis, B.C. and Wash.; Puccinia phaceliae, new host and geographic records for B.C., Alta., Wash.; and P. ornatula on Viola glabella, Olympic Mts., Wash. Rediscovery of P. ornatula at Glacier, B.C.. elucidates its ecology. Puccinia praegracilis var. praegracilis has been rediscovered at the type locality.

Two species of Myxobilatus (Myxosporida: Myxobilatidae) from freshwater fishes of western Canada, with description of M. yukonensis sp. nov.

1975 ◽  
Vol 53 (11) ◽  
pp. 1663-1668 ◽  
Author(s):  
J. R. Arthur ◽  
L. Margolis
Keyword(s):  
British Columbia ◽  
Urinary Bladder ◽  
Gasterosteus Aculeatus ◽  
Freshwater Fishes ◽  
Vancouver Island ◽  
Yukon Territory ◽  
Western Canada ◽  
Kidney Tubules ◽  
Cottus Cognatus

Myxobilatus yukonensis sp. nov. and Myxobilatus gasterostei (Parisi, 1912) sensu S. Shulman, 1953, are described and figured from the kidney tubules and urinary bladder of Cottus cognatus Richardson from Aishihik Lake, Yukon Territory, and Gasterosteus aculeatus Linn. from Vancouver Island, British Columbia, respectively.

Life History and Habits of a Midge, Phytophaga thujae Hedlin (Diptera: Cecidomyiidae) in Western Red Cedar Cones

1964 ◽  
Vol 96 (7) ◽  
pp. 950-957 ◽  
Author(s):  
A. F. Hedlin
Keyword(s):  
British Columbia ◽  
Life History ◽  
Larval Stage ◽  
Late Summer ◽  
Vancouver Island ◽  
Thuja Plicata ◽  
Mortality Factors ◽  
Pupal Development ◽  
Red Cedar ◽  
Western Red Cedar

AbstractThe midge, Phytophaga thujae Hedlin, is a common pest in cones of western red cedar, Thuja plicata Donn. In some years nearly 100% of cones in localities on Vancouver Island, British Columbia, are infested.Adults emerge in March and April to oviposit on young cones. Eggs hatch during April and May. Larvae feed on seeds and scales, and in late summer spin cocoons in the cones, in which to overwinter. Prepupal and pupal development occur during winter.Mortality factors include parasites and competition. Species of Torymus and Tetrastichus parasitize larvae of the midge. In years of severe infestation, competition in early stages can cause considerable mortality.A portion of the population may remain in diapause in the larval stage each year.

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