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- Title
Changes in prevalence and intensity of infection of Profilicollis altmani (Perry, 1942) cystacanth (Acanthocephala) parasitizing the mole crab Emerita analoga (Stimpson, 1857): an El Niño cascade effect?
- Authors
Marcelo Oliva; Irene Barrios; Sven Thatje; Jürgen Laudien
- Abstract
Abstract  Prevalence and intensity changes in cystacanths of the acanthocephalan Profilicollis altmani parasitizing the mole crab Emerita analoga under El Niño (EN) and non-El Niño (non-EN) conditions are analyzed. Both, mean intensity and prevalence of infection by P. altmani differ significantly for the whole size range and for each size class of 10 mm intervals (except prevalence for size classes exceeding 18 mm carapace length) between EN (1998) and non-EN (2002) years, without observed size distribution differences in the intermediate host E. analoga under either condition. Significant difference in infestation rates of the intermediate host E. analoga is discussed as being an EN cascade effect on predators such as sea birds (i.e., Larus spp. and Calidris sp.), acting as definitive hosts of P. altmani, and which are known to decrease significantly in abundance during EN.
- Subjects
EMERITA; HIPPIDAE; CRABS; PARASITISM
- Publication
Helgoland Marine Research, 2008, Vol 62, Issue 0, p57
- ISSN
1438-387X
- Publication type
Article
- DOI
10.1007/s10152-007-0082-7