Universität zu Köln

Bernardes, Marta, Dreesmann, Jonas, Goldschmidt, Tom and Ziegler, Thomas (2021). Multiple newt threats-occurrence of Paramesotriton deloustali and P. guangxiensis in differently disturbed habitats in Vietnam including new data on the parasite-host relationships with water mites. Limnologica, 88. MUNICH: ELSEVIER GMBH. ISSN 1873-5851

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Abstract

In this study we present the results from field work in northern Vietnam regarding the occurrence of the warty newt species Paramesotriton deloustali and P. guangxiensis in disturbed and undisturbed habitats and the presence of parasitic water mites of the genus Hygrobates (sg. Lurchibates) (Acari, Hydrachnidia). We report the first evidence of mite parasitism in P. guangxiensis and analyze differences in the infestation rates between both Paramesotriton species and habitat qualities. Furthermore we present the first indication of the detrimental effects of these parasite-host interactions. Our preliminary assessment seems to support the sensitivity of P. guangxiensis to habitat disturbances, as the average number of captured newts per stream was twice as high in undisturbed habitats as in disturbed ones. Until now a very specific parasite-host association was supposed between water mite and newt species. However, our results show the first evidence of a water mite species of the subgenus Lurchibates (Hygrobates forcipifer) parasitizing more than one host species, in this case not only P. deloustali (already known) but also P. guangxiensis (new record). The overall infestation rate was 27 % for P. deloustali and 71 % for P. guangxiensis, from which 100 % and 77 % of the mite-incidence occurred in undisturbed habitats, respectively. Furthermore the parasite load of the newts was clearly higher in prime quality streams: the parasite load in undisturbed habitats was very similar between P. deloustali (19.64 mites per newt) and P. guangxiensis (20.13 mites per newt), however it was significantly lower for P. guangxiensis in disturbed habitats (8.86 mites per newt). Future research should bring more detail on these parasite host associations, especially on the effect of parasitism on the newts. Warty newts are already threatened due to their shrinking natural habitat and overharvesting. We report the first concerns that mite parasitism might be a critical additional stress factor in undisturbed habitats.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bernardes, Marta UNSPECIFIED UNSPECIFIED UNSPECIFIED Dreesmann, Jonas UNSPECIFIED UNSPECIFIED UNSPECIFIED Goldschmidt, Tom UNSPECIFIED UNSPECIFIED UNSPECIFIED Ziegler, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-583422
DOI:	10.1016/j.limno.2021.125872
Journal or Publication Title:	Limnologica
Volume:	88
Date:	2021
Publisher:	ELSEVIER GMBH
Place of Publication:	MUNICH
ISSN:	1873-5851
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HYDRACHNIDIA; ACARI; HYGROBATIDAE; AMPHIBIANS; BIOINDICATORS; SALAMANDRIDAE; ECOLOGY; CAUDATA Multiple languages Limnology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58342