Competition between two closely related Tetrabothrius cestodes of the fulmar (Fulmarus glacialis L.)

Riley, John; Owen, R. Wynne

doi:10.1007/bf00389880

Cited by 14 publications

(10 citation statements)

References 13 publications

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“…In an earlier study in Britain, Riley (1972) found that prevalence of parasitic nematodes in Fulmars was 83% with seven worms per infected bird (maximum 23). Similarly, Riley and Wynne Owen (1975) found 100% prevalence of cestodes in 30 Fulmars from Britain, with an intensity of 110 per bird (maximum 610; note that intensity of infection was greatest in July, the same time as our collections). Foster et al .…”

Section: Discussionsupporting

confidence: 65%

Breeding status, contaminant burden and helminth parasites of Northern FulmarsFulmarus glacialisfrom the Canadian high Arctic

McLaughlin

Forbes

2007

Ibis

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We studied the relationship between contaminant concentrations in livers, endohelminth prevalence and physiological indices of chronic stress (spleen size, heterophil/lymphocyte ratios) in Northern Fulmars Fulmarus glacialis collected during the breeding season in Nunavut, Canada. No blood parasites were found, similar to reports for other petrel species elsewhere. However, 54% of Fulmars had gastrointestinal helminths, principally cestodes (52% prevalence, mean intensity of 11 worms), nematodes (34% prevalence, 3.6 worms) and acanthocephalans (3%, eight worms). Both prevalence and intensity of helminth infections were lower for Arctic Fulmars than for Fulmars and other petrels found in southern parts of the species’ range. Spleen size was not significantly related to either contaminant concentration or presence of parasites, suggesting that Fulmar health was generally unaffected by contaminant and parasite levels at the colony. However, we cannot rule out the possibility that Fulmars with higher parasitaemias or contaminant loads were in poorer condition and did not attend the breeding colony.

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Section: Discussionsupporting

confidence: 65%

Breeding status, contaminant burden and helminth parasites of Northern FulmarsFulmarus glacialisfrom the Canadian high Arctic

McLaughlin

Forbes

2007

Ibis

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“…The importance of interaction between congeners is particularly obvious in our depauperate system. Furthermore, in at least three studies (Pojmanska 1982, Riley andOwen 1975, and the present analysis) the respective sizes of the congeneric populations were found to be important.…”

Section: Discussionsupporting

confidence: 55%

“…We also questioned the importance of congeners in determining the structure of a community. In studies by Heyneman (1962), Paperna (1964), Pojmanska (1982), Riley and Owen (1975), Stock (1985) and Bush and Holmes (1986a), all of which demonstrated evidence for interactive communities, it was interaction largely between congeneric species that was suggested to impose structure on the communities. The importance of interaction between congeners is particularly obvious in our depauperate system.…”

Section: Discussionmentioning

confidence: 99%

“…This is particularly evident in the studies by Bush and Holmes (1986b) and Stock (1985); at least two of the diorchids studied by Pojmanska (1982) can use the same intermediate host species. The intermediate host(s) of the tetrabothriids studied by Riley and Owen (1975) is (are) unknown. We do not know the intermediate host(s) for all of the congeners in our study however, both D. radiaspinosa and D. paranumenU use the two-striped grasshopper, Melanoplus bivattatus (Say) (Bush, pers.…”

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confidence: 99%

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Intestinal helminth communities in long‐billed curlews: the importance of congeneric host‐specialists

Goater

Bush

1988

Ecography

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This paper examines patterns of structure in the helminth communities of long‐billed curlews collected on their breeding grounds in Alberta, Canada. The communities are neither large nor species rich but they do show evidence of having structure which is mediated by interactive mechanisms between some helminths. In particular, we focus on the role played by congeneric host‐specialists in contributing to community patterns and suggest that even in low diversity systems, some species may set the stage around which other species must assort.

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“…While much of the evidence from birds might appear to support the predictions for Wilson's interactive (phase 2) communities (e.g. Riley and Owen, 1975;Pojmanska, 1982;Bush and Holmes, 1986a;Stock and Holmes, 1987;Goater and Bush, 1988;Edwards and Bush, 1989), their species richness clearly places them near the evolutionary end (phase 4). In mammals, the evolutionary contemporaries of birds, we find less evidence for interactive communities, despite the fact that they exhibit similar levels of species richness.…”

Section: A Fair Test?mentioning

confidence: 88%

Ecological versus phylogenetic determinants of helminth parasite community richness

1990

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SummaryWe examine patterns of community richness among intestinal parasitic helminth communities in fishes, herptiles, birds and mammals with respect to the comparative number of component species in a host population. We show that terrestrial hosts have, on average, fewer component species than aquatic hosts. We also show that the mean number of component species in aquatic hosts increases from fishes through herptiles to birds before declining slightly in mammals. For terrestrial hosts, the mean number of component species increases from herptiles, through birds, reaching a maximum in mammals. We conclude that: (i) habitat of the host is more important in determining community richness than is host phylogeny; (ii) the phenomenon of 'host capture' may be largely responsible for increased species richness in some host groups; (iii) aquatic birds harbour the richest intestinal helminth communities; and (iv) as we interpret them, our data refute the time hypothesis, which would predict that fishes as the oldest lifestyle should have the richest helminth communities.

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Competition between two closely related Tetrabothrius cestodes of the fulmar (Fulmarus glacialis L.)

Cited by 14 publications

References 13 publications

Breeding status, contaminant burden and helminth parasites of Northern FulmarsFulmarus glacialisfrom the Canadian high Arctic

Breeding status, contaminant burden and helminth parasites of Northern FulmarsFulmarus glacialisfrom the Canadian high Arctic

Intestinal helminth communities in long‐billed curlews: the importance of congeneric host‐specialists

Ecological versus phylogenetic determinants of helminth parasite community richness

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