Article

Effect of parasitism on respiration rates of adults of different Artemia strains from Spain

Instituto de Acuicultura de Torre de la Sal CSIC, Castellón, Spain
Parasitology Research (Impact Factor: 2.33). 10/2000; 86(9):772-4. DOI: 10.1007/s004360000236
Source: PubMed

ABSTRACT The effect of cestode parasitism on the respiration rate (MO2) of different strains of Artemia from wild populations of Spain was studied. Respiration rates (MO2) of adults from each strain were not affected by the presence of cysticercoids of Flamingolepis liguloides or Hymenolepis stellorae (Cestode, Hymenolepididae). This finding could be related to the absence of reproductive activity (parasite castration) in parasitized females.

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    • "Author's copy eaten by definitive hosts (Sánchez et al. 2009a). The infections with cysticercoids are linked with neurological and physiological disorders of intermediate hosts, changing the lipid content and respiration rate (Amat et al. 1991a; Varó et al. 2000; Sánchez et al. 2009b). Infected brine shrimps exhibit enhanced swarming propensity that may also increase the probability for transmission by predation (Rode et al. 2013). "
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    ABSTRACT: One of the best examples of rapid displacement of native species by an invader is the eradication of native Artemia salina and A. parthenogenetica in the Mediterranean by the introduced American A. franciscana. Previous studies based on sampling from limited time periods suggest that the success of the American species as a competitor may be due partly to different parasite burden, since native Artemia spp. have high cestode infection rates regulating their density. The aim of this study is to test the hypothesis that the helminth infection in A. franciscana in its invasive range is low throughout its annual life cycle. Samples of A. franciscana were collected every second month from La Tapa saltern (Andalusia) during one year. Five helminth species were recorded: cestodes Flamingolepis liguloides, F. flamingo, Gynandrotaenia stammeri (all flamingo parasites), Eurycestus avoceti (a shorebird parasite) and larval spirurids of the Acuariinae (the first record of nematodes in Artemia). The overall infection rate was low, with total prevalence 5.9% and prevalence of individual parasite species between 0.2 and 3.2%. The mean abundance of helminths was 0.005–0.155 (av. 0.068), 5–13 times lower than in native congeners. Waterbird counts indicate that the low infection rates cannot be explained by lack of definitive hosts. The results are consistent with the hypothesis that helminths have no regulating effect on the invasive brine shrimp in the Mediterranean. The replacement of the native populations by the invader can be partially explained by a competition mediated by parasites/predators through a differential impact on host fitness.
    Acta Parasitologica 09/2014; 59(3):380-9. DOI:10.2478/s11686-014-0255-x · 0.97 Impact Factor
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    • "This increases the caloric content of infected shrimp, which may benefit predators. Furthermore, cestodes reduce the fecundity of the shrimp (Amat et al. 1991a; Varó et al. 2000). By influencing the survival and reproductive rates of the dominant grazer in hypersaline systems , cestodes have the potential to cause strong cascading effects at other trophic levels (e.g., by releasing algae from grazing pressure). "
    Parasitology Research 05/2013; 112(5):1913-23. · 2.33 Impact Factor
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    • "This increases the caloric content of infected shrimp, which may benefit predators. Furthermore, cestodes reduce the fecundity of the shrimp (Amat et al. 1991a; Varó et al. 2000). By influencing the survival and reproductive rates of the dominant grazer in hypersaline systems , cestodes have the potential to cause strong cascading effects at other trophic levels (e.g., by releasing algae from grazing pressure). "
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    ABSTRACT: Brine shrimp, Artemia spp., act as intermediate hosts for a range of cestode species that use waterbirds as their final hosts. These parasites can have marked influences on shrimp behavior and fecundity, generating the potential for cascading effects in hypersaline food webs. We present the first comprehensive study of the temporal dynamics of cestode parasites in natural populations of brine shrimp throughout the annual cycle. Over a 12-month period, clonal Artemia parthenogenetica were sampled in the Odiel marshes in Huelva, and the sexual Artemia salina was sampled in the Salinas de Cerrillos in Almería. Throughout the year, 4-45 % of A. parthenogenetica were infected with cestodes (mean species richness = 0.26), compared to 27-72 % of A. salina (mean species richness = 0.64). Ten cestode species were recorded. Male and female A. salina showed similar levels of parasitism. The most prevalent and abundant cestodes were those infecting the most abundant final hosts, especially the Greater Flamingo Phoenicopterus ruber. In particular, the flamingo parasite Flamingolepis liguloides had a prevalence of up to 43 % in A. parthenogenetica and 63.5 % in A. salina in a given month. Although there was strong seasonal variation in prevalence, abundance, and intensity of cestode infections, seasonal changes in bird counts were weak predictors of the dynamics of cestode infections. However, infection levels of Confluaria podicipina in A. parthenogenetica were positively correlated with the number of their black-necked grebe Podiceps nigricollis hosts. Similarly, infection levels of Anomotaenia tringae and Anomotaenia microphallos in A. salina were correlated with the number of shorebird hosts present the month before. Correlated seasonal transmission structured the cestode community, leading to more multiple infections than expected by chance.
    Parasitology Research 03/2013; 112(5). DOI:10.1007/s00436-013-3347-x · 2.33 Impact Factor
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