Metazoan parasites and commensals of five crab (Brachyura) species from eastern Canada

1985 ◽  
Vol 63 (9) ◽  
pp. 2224-2229 ◽  
Author(s):  
John Brattey ◽  
Robert W. Elner ◽  
Leslie S. Uhazy ◽  
Anne E. Bagnall
Keyword(s):  
Carcinus Maenas ◽  
Eastern Canada ◽  
Cancer Borealis ◽  
New Host ◽  
Metazoan Parasites ◽  
Larval Stages ◽  
Cancer Irroratus ◽  
Diverse Community ◽  
New Host Records ◽  
Larval Parasites

Seven hundred and twenty-one brachyuran crabs (Cancer borealis, Cancer irroratus, Carcinus maenas, Chionoecetes opilio, Geryon quinquedens) were collected in waters off eastern Canada during 1980–1982 and the prevalences of metazoan parasites and commensals determined. The survey revealed larval stages of three species of parasite, Microphallus sp. (Platyhelminthes: Digenea), Polymorphus sp. (Acanthocephala: Palaeacanthocephala), Nectonema sp. (Nematomorpha: Nectonematoidea), and five species of ectocommensal, Eteonopsis geryonicola (Annelida: Polychaeta), Johanssonia arctica (Annelida: Hirudinea), Ectocotyla paguri and Ectocotyla multitesticulata (Platyhelminthes: Turbellaria), and Carcinonemertes sp. (Nemertea: Monostilifera). New host records are reported for E. geryonicola in the branchial chambers of C. opilio and for Carcinonemertes sp. on egg masses of ovigerous G. quinquedens. All of the larval parasites, except Nectonema sp., and all of the ectocommensals, except J. arctica and Ectocotyla spp., are previously unreported from crabs off eastern Canada. Our findings suggest that the crab species studied do not support a diverse community of metazoan parasites or commensals.

Metazoan parasites of three species of scoter (Anatidae)

1982 ◽  
Vol 60 (10) ◽  
pp. 2253-2257 ◽  
Author(s):  
Charles E. Bourgeois ◽  
William Threlfall
Keyword(s):  
New Brunswick ◽  
Host Species ◽  
Quantitative Data ◽  
Marine Ecosystem ◽  
Life Cycles ◽  
Individual Species ◽  
Intensity Of Infection ◽  
New Host ◽  
Metazoan Parasites ◽  
New Host Records

One hundred and seventy-five (94 surf, 36 white-winged, and 45 black) scoters obtained from four localities (New Brunswick, British Columbia, Labrador, and Norway) in 1973–1978 were examined for metazoan parasites, with 91% (159 birds: 86 surf, 33 white-winged, and 40 black scoters) being infected. Approximately 45 species of parasites, excluding cestodes, were found (36 from the surf, 25 from the white-winged, and 27 from the black), including 39 which were new host records. Quantitative data, including prevalence and intensity of infection, are given for each helminth and host. Comparisons between different ages and sexes are made, and between different host species. Individual species of parasites are discussed with regard to topics such as location within host. Comments are made on the geographical distribution of the parasites found and their life cycles, where known (seven cycle through the marine ecosystem, seven through freshwater, four through either system, and one through a dipteran).

Helminth Parasites of the Gunner,Tautogolabrus adspersus(Walbaum) in Newfoundland

1970 ◽  
Vol 44 (2) ◽  
pp. 169-188 ◽  
Author(s):  
Chandra Sekhar S. ◽  
William Threlfall
Keyword(s):  
Fish Species ◽  
Host Species ◽  
Helminth Parasites ◽  
Tautogolabrus Adspersus ◽  
New Host ◽  
Metazoan Parasites ◽  
Negative Results ◽  
Close Proximity ◽  
Species Being ◽  
New Host Records

808 cunners,Tautogolabrus adspersus(Walbaum) were obtained from eight sampling stations around the Newfoundland coast, during the periods August-September, 19G7 and July-October, 1908. The fish were examined for metazoan parasites using conventional parasitological techniques. 22 species of parasites (10 trematode; 5 cestode; 6 nematode; 1 acanthocephalan) were recovered. This number excludes metacercariae ofCryptocotyle lingua(Creplin, 1825). 19 are new host records. Details of infections with the various species are given, each species being discussed and/or described individually. No leeches were found on this host despite the fact that it lives in. close proximity to other fish species that are heavily infested and an experiment performed to determine if leeches would move from one host species to another gave negative results.

Metazoan parasites and food of short-tailed weasels and mink in Newfoundland, Canada

1982 ◽  
Vol 60 (2) ◽  
pp. 180-183 ◽  
Author(s):  
David H. Jennings ◽  
William Threlfall ◽  
Donald G. Dodds
Keyword(s):  
Marked Change ◽  
Mustela Vison ◽  
Gut Contents ◽  
New Host ◽  
Metazoan Parasites ◽  
Mustela Erminea ◽  
Food Items ◽  
Percentage Occurrence ◽  
Sorex Cinereus ◽  
New Host Records

Forty short-tailed weasels (Mustela erminea Linnaeus, 1758) and 48 mink (Mustela vison Schreber, 1777) were collected, between January 1978 and February 1979, in three areas of insular Newfoundland and examined for metazoan parasites. Eight genera of parasites were recovered. Two findings constitute new host records. Forty (100%) of the M. erminea and 17 (35%) of the M. vison were infected. The effect of one species, Skrjabingylus nasicola (Leuckart, 1842), on the skull of the weasels was examined, and comments are made on its increase in prevalence with the introduction to insular Newfoundland of the masked shrew (Sorex cinereus Kerr, 1792) in 1958.Gut contents of both M. erminea and M. vison were identified and the percentage occurrence of different food items was calculated. In the case of the former species a marked change in diet, from lagomorphs and passerines to insectivores, was noted when the present (1978–1979) sample was compared with a 1956–1958 sample.

Metazoan parasites of Northwest Atlantic redfishes (Sebastes spp.)

1984 ◽  
Vol 62 (9) ◽  
pp. 1879-1885 ◽  
Author(s):  
C. E. Bourgeois ◽  
I.-H. Ni
Keyword(s):  
Host Specificity ◽  
Host Species ◽  
Quantitative Data ◽  
Intensity Of Infection ◽  
New Host ◽  
Metazoan Parasites ◽  
Northwest Atlantic ◽  
Grand Banks ◽  
New Host Records

A total of 443 specimens of three redfish species (209 Sebastes fasciatus, 123 S. marinus, and 111 S. mentella), obtained from Northwest Atlantic Fisheries Organization (NAFO) divisions 2H, 2J (Labrador area), 3K (Northeastern Newfoundland), 3L, 3O (Grand Banks) 3M (Flemish Cap), and 3Ps (St. Pierre Bank) during 1980–1982, was examined for metazoan parasites; 182 (87.1%) S. fasciatus, 120 (97.6%) S. marinus, and 103 (92.8%) S. mentella were infected. Seventeen species of parasites were recovered (12 from S. fasciatus, 16 from S. marinus, and 11 from S. mentella). 22 of which were new host records. Quantitative data, including prevalence and intensity of infection, are given for each parasite by host species and NAFO division. The zeogeography and host specificity of the parasites encountered in this study are discussed in relation to redfish and hypothetical stocks of Sebastes spp. are proposed based on the parasite data collected.

Metazoan Parasites, Excluding Monogenea, from Longnose and White Suckers

1970 ◽  
Vol 27 (7) ◽  
pp. 1317-1319 ◽  
Author(s):  
William Threlfall ◽  
George Hanek
Keyword(s):  
Parasitic Copepod ◽  
Catostomus Commersoni ◽  
New Host ◽  
Metazoan Parasites ◽  
Catostomus Catostomus ◽  
Longnose Suckers ◽  
New Host Records

Seven genera of helminths (two of Digenea, one of Cestoda, and two each of Nematoda and Acanthocephala) and one species of parasitic copepod were recovered from 40 longnose suckers (Catostomus catostomus) and five white suckers (Catostomus commersoni), caught at two localities in Labrador, during August and September 1969. The helminths reported include five new host records.

Digenea, Nematoda, and Acanthocephala of two species of ducks from Ontario and eastern Canada

1978 ◽  
Vol 56 (3) ◽  
pp. 436-439 ◽  
Author(s):  
Shane P. Mahoney ◽  
William Threlfall
Keyword(s):  
Host Species ◽  
Parasite Species ◽  
Infected Bird ◽  
Helminth Parasites ◽  
Eastern Canada ◽  
New Host ◽  
Bucephala Clangula ◽  
Anas Rubripes ◽  
New Host Records ◽  
Age And Sex

Sixty ducks (34 Anas rubripes, 26 Bucephala clangula), collected at three localities in Ontario and eastern Canada, were examined for helminth parasites. Twenty-three genera of parasites (17 of Digenea, 5 of Nematoda, 1 of Acanthocephala) were recovered. Eighteen of the recoveries represent new host records (11 digeneans, 5 nematodes, 2 acanthocephalans).Eighty-eight percent of both host species were infected. The number of parasite species per infected bird ranged from 1–9 (mean 4) for A. rubripes and 1–7 (mean 2) for B. clangula. Preferred age and sex of host and site of infections for each parasite species was noted.

Distribution and Association of Larval Crabs (Decapoda: Brachyura) on the Scotian Shelf

1986 ◽  
Vol 43 (3) ◽  
pp. 587-599 ◽  
Author(s):  
J. C. Roff ◽  
L. P. Fanning ◽  
A. B. Stasko
Keyword(s):  
Group Analysis ◽  
Carcinus Maenas ◽  
Distribution Patterns ◽  
Homarus Americanus ◽  
Abundant Species ◽  
Scotian Shelf ◽  
Cancer Borealis ◽  
Cancer Irroratus ◽  
Stage Of Development ◽  
Cape Breton

Thirty-five taxa of neustonic larval Brachyura were distinguished and identified to stage of development in 3055 samples from the Scotian Shelf taken from north of Cape Breton to Georges Bank. A maximum of 17 species of larvae was taken in a single tow, with a norm of about 4 per tow. The most abundant species, collected in all stages of development, were the indigenous Chionoecetes opilio, Hyas araneus and Hyas coarctatus, Cancer borealis and Cancer irroratus, and Carcinus maenas. Biomass was dominated by the Hyas and Cancer species. Distributions of the three Majidae species indicated that larvae drift southwest along the shelf, and that they are indigenously derived. Twenty-six expatriate species occurred as megalopas only, predominantly offshore. Reciprocal averaging and factor analysis showed that there was considerable separation of the indigenous and expatriate larval species, but did not reveal strong relationships to environmental variables or ecological gradients. Recurrent group analysis indicated that community structure was weak and variable, but confirmed the virtual separation into indigenous and expatriate associations. An examination of co-occurrences of indigenous and expatriate species by stage of development showed strong patterns. We suggest that concurrent analysis of larval lobster and larval crab distribution patterns on the Scotian Shelf could indicate recruitment origin of lobsters (Homarus americanus).

Metazoan Parasites of Salmonids and Coregonids from the Avalon Peninsula, Newfoundland

1970 ◽  
Vol 27 (10) ◽  
pp. 1894-1897 ◽  
Author(s):  
William Threlfall ◽  
George Hanek
Keyword(s):  
Salmo Trutta ◽  
Salvelinus Fontinalis ◽  
Host Record ◽  
Coregonus Clupeaformis ◽  
New Host ◽  
Metazoan Parasites ◽  
Parasitic Copepods ◽  
New Host Record ◽  
Avalon Peninsula ◽  
New Host Records

Sixty-seven salmonids and coregonids (32 Salvelinus fontinalis, 3 Salmo salar, 22 Salmo trutta, 10 Coregonus clupeaformis), caught at various locations on the Avalon Peninsula, Newfoundland, were examined for metazoan parasites, during the period November 15, 1968–June 12, 1969. Eight genera of helminths (two of Monogenea, three of Digenea, one each of Cestoda, Nematoda, Acanthocephala) and one of parasitic copepods (Ergasilus) were recovered. This number includes one new host record and two new host records for Newfoundland.

A new species of Glyptapanteles (Hymenoptera: Braconidae: Microgastrinae), a larval parasitoid of Elymnias hypermnestra (Linnaeus) (Lepidoptera: Nymphalidae), along with some new host records of parasitoids from Peninsular India

Zootaxa ◽  
2012 ◽  
Vol 3227 (1) ◽  
pp. 54 ◽  
Author(s):  
ANKITA GUPTA ◽  
BLAISE PEREIRA
Keyword(s):  
New Species ◽  
New Host ◽  
Peninsular India ◽  
Larval Parasitoid ◽  
Hymenopteran Parasitoids ◽  
First Time ◽  
A New Species ◽  
New Host Records

A new species, Glyptapanteles hypermnestrae Gupta and Pereira, is described from Maharashtra, India, and comparedwith closely allied species. This new species was bred from parasitized larvae of Elymnias hypermnestra (Linnaeus) (Lep-idoptera: Nymphalidae). In addition to this, two hymenopteran parasitoids, Apanteles folia Nixon (Braconidae: Microgas-trinae) and Brachymeria indica (Krausse) (Chalcididae), are for first time reported parasitizing larvae of Arhopalaamantes (Hewitson) (Lepidoptera: Lycaenidae) and pupae of Pareronia valeria (Cramer) (Lepidoptera: Pieridae) respectively.

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