Two hundred and fifty auks of five species (Alca torda, Uria aalge, Uria lomvia, Cepphus grylle, Fratercula arctica) were collected in Newfoundland in 1972 and 1973, and examined for Ixodes uriae. Ticks were recovered from all the bird species examined except C. grylle. No significant difference (P > 0.05) was found in the burden on adult auks with regard to sex and weight. The distribution of the tick stages on the hosts is presented: adult females prefer the neck, larvae prefer the body regions. The distribution of nymphs varied with the host species. The population structure of the tick on the hosts is recorded. Immature auks are rarely infested.
One thousand and one alcids of six species (Alca torda, Uria aalge, Uria lomvia, Plautus alle, Cepphus grylle, Fratercula arctica) were collected in the northwestern North Atlantic, during the period June, 1966 – September, 1969, and examined for parasites. Helminths belonging to 12 genera were recovered, the common murre (U. aalge) containing the greatest number of species. Statistically significant annual variations (P < 005) in the parasite burden of this species were noted. No differences in intensity of infection in male and female birds and in chicks and adults were detected. Twelve new host records are noted.
Two hundred and seventy alcids representing six species from Newfoundland, Canada, were examined for Mallophaga. A total of 12 species belonging to three genera (Saemundssonia, Cummingsiella, Austromenopon) were recovered. Each host species and the parasites recovered from it are discussed separately. Details of prevalence and intensity of parasitism are given, as are seasonal and annual data. Differences between the burdens of adults and chicks are recorded and the prevalence and intensity of infestation is related to the ecology of the hosts.
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