Changes in parasite-chaetognath species assemblages in the Mexican Central Pacific before and during El Niño 1997-1998

Diseases of Aquatic Organisms
Horacio Lozano-CoboIsrael Ambriz-Arreola

Abstract

We investigated the seasonal and interannual changes in diversity, abundance, and prevalence of chaetognaths and their parasites collected monthly during 1996-1998 in the Mexican Central Pacific. We tested the hypothesis of a positive relationship between abundance and species richness of chaetognaths and their parasites, and investigated the influence of the 1997-1998 El Niño event on this host-parasite interaction. Of the 9 chaetognath species collected in the present study, only 7 were found to be parasitized. Of 78154 chaetognath specimens collected, 790 were parasitized (1% prevalence) with at least 1 type of epibiont (cysts, perhaps protists) and 6 types of endoparasites: protists (apicomplexans, dinoflagellates, and ciliates), digeneans, cestodes, acanthocephalans, nematodes, and other unidentified endoparasites. Cysts, digeneans, and cestodes were the most abundant parasites. Mean intensity ranged from 1-4 endoparasites and from 1-21 epibionts host-1. Zonosagitta bedoti and Flaccisagitta enflata were the most abundant chaetognath species and had the highest parasite diversity. Mesosagitta minima and Parasagitta euneritica had the highest parasite prevalence (>2%). A 2-way cluster analysis defined sampling month groups a...Continue Reading

References

Jan 20, 2007·Parasitology·R Poulin
May 29, 2009·Parasitology Research·Janet Koprivnikar, Robert Poulin
Aug 1, 2010·Environmental Microbiology Reports·Eugene RosenbergIlana Zilber-Rosenberg
Jun 21, 2013·Biological Reviews of the Cambridge Philosophical Society·Tsukushi KamiyaRobert Poulin
Apr 9, 2016·Parasite : Journal De La Société Française De Parasitologie·Yusuke KondoJun Nishikawa
Mar 31, 2017·Diseases of Aquatic Organisms·Horacio Lozano-CoboJaime Gómez-Gutiérrez
Apr 21, 2017·Acta Parasitologica·Horacio Lozano-CoboMaría Del Carmen Gómez Del Prado-Rosas

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