J 2017

Metazoan parasites of African annual killifish (Nothobranchiidae): abundance, diversity, and their environmental correlates

NEZHYBOVÁ, Veronika, Martin REICHARD, Radim BLAŽEK and Marketa ONDRACKOVA

Basic information

Original name

Metazoan parasites of African annual killifish (Nothobranchiidae): abundance, diversity, and their environmental correlates

Authors

NEZHYBOVÁ, Veronika (203 Czech Republic, belonging to the institution), Martin REICHARD (203 Czech Republic, guarantor), Radim BLAŽEK (203 Czech Republic, belonging to the institution) and Marketa ONDRACKOVA (203 Czech Republic)

Edition

BIOTROPICA, Hoboken, NJ USA, Wiley, 2017, 0006-3606

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10618 Ecology

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 2.281

RIV identification code

RIV/00216224:14310/17:00100381

Organization unit

Faculty of Science

DOI

UT WoS

000395643400010

Keywords in English

distribution patterns; fish intermediate host; habitat variation; Limpopo; Mozambique; Nothobranchius furzeri; paratenic host

Tags

Změněno: 9/4/2018 10:40, Ing. Nicole Zrilić

Abstract

V originále

Estimates of biodiversity and its global patterns are affected by parasite richness and specificity. Despite this, parasite communities are largely neglected in biodiversity estimates, especially in the tropics. We studied the parasites of annual killifish of the genus Nothobranchius that inhabit annually desiccating pools across the African savannah and survive the dry period as developmentally arrested embryos. Their discontinuous, non-overlapping generations make them a unique organism in which to study natural parasite fauna. We investigated the relationship between global (climate and altitude) and local (pool size, vegetation, host density and diversity, and diversity of potential intermediate hosts) environmental factors and the community structure of killifish parasites. We examined metazoan parasites from 21 populations of four host species (Nothobranchius orthonotus, N.furzeri, N.kadleci, and N.pienaari) across a gradient of aridity in Mozambique. Seventeen parasite taxa were recorded, with trematode larval stages (metacercariae) being the most abundant taxa. The parasites recorded were both allogenic (life cycle includes non-aquatic host; predominantly trematodes) and autogenic (cycling only in aquatic hosts; nematodes). The parasite abundance was highest in climatic regions with intermediate aridity, while parasite diversity was associated with local environmental characteristics and positively correlated with fish species diversity and the amount of aquatic vegetation. Our results suggest that parasite communities of sympatric Nothobranchius species are similar and dominated by the larval stages of generalist parasites. Therefore, Nothobranchius serve as important intermediate or paratenic hosts of parasites, with piscivorous birds and predatory fish being their most likely definitive hosts.