The Seasonal Incidence of Infection of the Snail Nassarius obsoletus (Say) with Larval Trematodes

Gambino, J. J.

doi:10.2307/3274396

Cited by 13 publications

(10 citation statements)

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“…As our monthly samples were not replicated, we can make no statement about whether or not these differences are significant. The range in monthly prevalence of infection (0.7-5.1%) found in the current study was consistent with those generally reported by previous authors (Stunkard and Hinchliffe, 1952;Grodhaus and Keh, 1958;Gambino, 1959;McDaniel and Coggins, 1972). We are unable to comment on the phenomenon reported by Sindermann (1960) and Gambino (1959) in which very high infection prevalences (8-20%) were reported in snails that remained in large tidal pools at the high tide line during low tide because no snails (infected or not) remained at the high tide line during low tide at Mumford Cove.…”

Section: Morphology Of Adult Femalessupporting

confidence: 93%

“…host in North America. Some authors believe it does (Stunkard andHinchliffe, 1951, 1952;Grodhaus and Keh, 1958;Gambino, 1959;McDaniel and Coggins, 1972), others that it does not (Miller and Northup, 1926;Sindermann, 1960). The dearth of samples from any winter months, let alone consecutive winter months, in previous studies makes this question difficult to answer from existing literature.…”

Section: Morphology Of Adult Femalesmentioning

confidence: 94%

“…As a result, we suggest that although A. variglandis is able to live in a variety of avian species, it is primarily a parasite of gulls. (Miller and Northup, 1926;Stunkard and Hinchliffe, 1952;Penner, 1953a;Gambino, 1959;Sindermann, 1960). However, the results of the current study, in which relatively large numbers of intermediate and definitive hosts were sampled, provide a new perspective on the life cycle dynamics of A. variglandis.…”

Section: Definitive Hostsmentioning

confidence: 95%

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Investigation of the Life Cycle and Adult Morphology of the Avian Blood Fluke Austrobilharzia variglandis (Trematoda: Schistosomatidae) from Connecticut

Barber¹,

Caira²

1995

The Journal of Parasitology

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This study was undertaken to expand the current knowledge of the life cycle and adult morphology of the avian schistosome Austrobilharzia variglandis, which causes a marine cercarial dermatitis in New England. The specific objectives were to: (1) investigate the seasonality of the infection in the molluscan intermediate host, Ilyanassa obsoleta; (2) determine which bird species are acting as natural definitive hosts for the parasite; and (3) characterize the morphology of the parasite using scanning electron microscopy (SEM). One-thousand individuals of I. obsoleta were collected each month for 14 consecutive months and examined for the parasite. Ten to 15 specimens of each of the following avian species, Larus argentatus, Larus delawarensis, Larus marinus, Phalacrocorax auritus, and Branta canadensis, and 2 individuals of Larus atrilla, were collected and examined for schistosomes. Twenty adult male and 10 adult female specimens of A. variglandis were processed for SEM. Ilyanassa obsoleta was found to maintain a relatively low prevalence of infection (0.7-5.1%) throughout the 14-mo study, but no fully developed cercaria were visible in sporocysts recovered from snails collected in winter months. The Larus species had both the highest prevalence (85-92.8%) and highest mean intensity (12.1-34.5 male worms) of infection with A. variglandis. These data suggest that overwintering snail populations can harbor viable infections and in the spring infect shore birds (or humans) with cercaria. The snail and definitive host data suggest that A. variglandis is a year-round resident of the state.(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Morphology Of Adult Femalessupporting

confidence: 93%

Section: Morphology Of Adult Femalesmentioning

confidence: 94%

Section: Definitive Hostsmentioning

confidence: 95%

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Investigation of the Life Cycle and Adult Morphology of the Avian Blood Fluke Austrobilharzia variglandis (Trematoda: Schistosomatidae) from Connecticut

Barber¹,

Caira²

1995

The Journal of Parasitology

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“…We have been studying the Cape Henlopen, Delaware, population of Ilyanassa obsoleta with regard to various aspects of nutrient requirements and procurement (Curtis and Hurd 1979, 1981a, b, Curtis 1980. Many other workers have studied aspects of other populations of this species (e.g., Dimon 1905, Miller and Northup 1926, Jenner and Chamberlain 1955, Jenner 1956a, b, c, 1957, 1959, 1977, Gambino 1959, Sindermann 1960, Scheltema 1964, McDaniel and Coggins 1972, Bianchi and Levinton 1981.…”

Section: Introductionmentioning

confidence: 99%

Age, Sex, and Parasites: Spatial Heterogeneity in a Sandflat Population of Ilyanassa Obsoleta

Curtis¹,

Hurd²

1983

Ecology

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An intensive sampling study, undertaken in a natural sandflat population of an estuarine neogastropod, Ilyanassa obsoleta, revealed a marked degree of spatial heterogeneity for a number of important characteristics. Growth rate could be inferred by observing changes in size—classes over time, but the inequitable spatial distribution of size—classes renders size/frequency analysis impractical and of dubious predictive value for this population. Overall parasitism rate in this population is high, generally increases exponentially with increasing age, and creates a relatively narrow reproductive fenestra temporalis by apparently permanent sexual impairment of infected snails. In fact, the strong influence of parasites on behavior and physiology of snails may necessitate distinguishing between apparent and functional individuals, with regard to their role in estuarine benthic communities. However, incidence of both parasitism and parasite species is highly variable in space. Nearly half of all samples taken departed significantly from the overall sex ratio, indicating that distribution of sexes is also heterogeneous. Since there is little predictive relationship between specific samples and overall population trends, it is likely that differentiating between trends that are truly temporal and those that are in reality spatial is difficult at best. Moreover, high spatial heterogeneity in the field has implications for the interpretation of laboratory studies as well as those done in the field and indicates that generalizations about the biology and ecology of this species gleaned from small, albeit random, samples should be viewed with caution.

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“…Gastropods, in particular, were identified early on as hosts for a diversity of parasites under study (Bayne, 1983;Fried, 1997), including intermediate hosts and transmitters of terrestrial and freshwater trematodes (e.g., Foster, 1958;Becker, 1980;Esch, 1991a, 1991b;Esch and Fernandez, 1994;Adema and Loker, 1997;Thompson, 1997;Schmidt and Roberts, 2000). However, interest in marine species followed much later (e.g., Gambino, 1959;Cheng, 1967;Yoshino, 1975;Tallmark and Norrgren, 1976;Lauckner, 1984Lauckner, , 1987Kuris, 1990;Sousa, 1993;Grosholz, 1994;Mouritsen and Jensen, 1994;Jensen et al, 1996;Calvo-Ugarteburu and McQuaid, 1998;Curtis, 2002).…”

Section: Molluscan Parasites and Diseasesmentioning

confidence: 98%

The ecology, evolution, impacts and management of host–parasite interactions of marine molluscs

Coen

Bishop

2015

Journal of Invertebrate Pathology

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The Seasonal Incidence of Infection of the Snail Nassarius obsoletus (Say) with Larval Trematodes

Cited by 13 publications

References 0 publications

Investigation of the Life Cycle and Adult Morphology of the Avian Blood Fluke Austrobilharzia variglandis (Trematoda: Schistosomatidae) from Connecticut

Investigation of the Life Cycle and Adult Morphology of the Avian Blood Fluke Austrobilharzia variglandis (Trematoda: Schistosomatidae) from Connecticut

Age, Sex, and Parasites: Spatial Heterogeneity in a Sandflat Population of Ilyanassa Obsoleta

The ecology, evolution, impacts and management of host–parasite interactions of marine molluscs

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