We relied on gammarids that were naturally infected with cystacanth
parasites, that is, those at the last larval stage that is infective for the definitive host and at which such changes occur in hosts, and studied the effect of acclimatization at different temperatures on the behavior of uninfected and infected individuals.
Changes in prevalence and intensity of infection of ProfilicoUis altmani (Perry, 3942) cystacanth
(Acanthocephala) parasitizing the mole crab Emerita analoga (Stimpson, 3857): an El Nino cascade effect?
56 0-15 2.2 [+ or -] 3 (cystacanth
) ZUEC-ACA 6-10 Digenea Lectthochtnum 100 31-1111 557.4 [+ or -] 243.5 microstomum ZUEC-PLA 40-41 Monogenea Capsalidae gen.
of lobsters 90 19 Vibriosis 38% * 6% Granulomas 44% * 5% Possible early calcinosis 3% 0% Hepatopancreatitis 15% * 0% (any form) Focal necrosis 9% 0% Coalescent necrosis 6% 0% (severe) Filament necrosis in gill 8% 5% Idiopathic lesions in eyes 54% * 16% Severity of eye lesions 21.5% [+ or -] 26.5% 1.5% [+ or -] 4.7% Acanthocephalan cystacanth
7% 0% * Chi-square, P < 0.05.
Voucher helminths from the 2004-2007 collection were deposited in the United States National Parasite Collection, USNPC, Beltsville, Maryland: Distoichometra bufonis (USNPC 100930); Glypthelmins quieta (USNPC 100931); Gorgoderina multilobata (USNPC 100932); Haematoloechus kernensis (USNPC 100933); Megalodiscus microphagus (USNPC 100934); Digenean metacercariae (USNPC 100938); Cosmocerca variabilis (USNPC 100935); Rhabdias ranae (USNPC 100936); Acanthocephalan cystacanth
1.37 (1-44) Cystacanth
. L-Me-S CECOAL 04092904 #: number of parasites, %: prevalence.
Gravid individuals of two species of Nematoda, Strongyluris similis Caballero, 1938, Thubunaea iguanae Telford, 1965 and one cystacanth
of a species of oligacanthorhynchid Acanthocephala were found.
Intermediate hosts that harbor the infective stage of acanthocephalans, the cystacanth
stage, may show physiological changes such as reduced [O.sub.2] consumption (Rumpus and Kennedy 1974) and increased hemocyanin concentration, the respiratory pigment for most crustaceans (Bentley and Hurd 1993).
Acanthocephala (1993) unknown cystacanth
Arkansas 1/37 (3%) McAllister et al.
23.3 1-18 3.93 [+ or -] 3.82 (cystacanth
) Nematoda Anisakidae 88.3 1-1881 171.12 [+ or -] 343.40 (larvals) Copepoda Metacaligus 83.3 1-90 18.40 [+ or -] 17.90 uruguayensis Parasites Mean abundance Site of [+ or -] SD infection Digenea Lecithochirium 179.40 [+ or -] 255.70 stomach and microstomum intestine Lecithochirium 3.10 [+ or -] 6.60 stomach and sp.
larvae were recovered from two of the three immature Lepomis sp.
and one species of Acanthocephala: an oligacanthorhynchid cystacanth
. Number of helminths, prevalence (infected snake/number snakes examined X 100), location by province and museum numbers are in Table 1.