Decline in parasite diversity promoted by lower host densities
in Lake Tanganyika

a 2016

Decline in parasite diversity promoted by lower host densities in Lake Tanganyika

KMENTOVÁ, Nikol; Milan GELNAR; Monika MENDLOVÁ; Van Steenberge MAARTEN; Stephan KOBLMÜLLER et al.

Základní údaje

Originální název

Decline in parasite diversity promoted by lower host densities in Lake Tanganyika

Autoři

KMENTOVÁ, Nikol; Milan GELNAR; Monika MENDLOVÁ; Van Steenberge MAARTEN; Stephan KOBLMÜLLER a Maarten Pieterjan VANHOVE

Vydání

European One Health/EcoHealth Workshop, 2016

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10600 1.6 Biological sciences

Stát vydavatele

Belgie

Utajení

není předmětem státního či obchodního tajemství

Označené pro přenos do RIV

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

host specificity; Bathybatini; cichlids; Monogenenea

Změněno: 18. 1. 2017 22:05, Mgr. Nikol Kmentová, Ph.D.

Anotace

V originále

Lake Tanganyika is a remarkable freshwater ecosystem characterised by high stability and a diversified fauna. Surprisingly, despite their high importance in ecosystems, parasites have been overlooked in most of the investigations but are getting more and more attention over the last years. A recent study revealed radiation events of monogenean parasites promoted by host speciation in the littoral zone. Monogeneans mainly occurring on freshwater and marine fishes and usually display strong host specificity related to their direct life cycle and long co-evolutionary processes. The main purpose of our study was testing diversity and speciation patterns of monogeneans infecting deepwater cichlids in the lake. In total, all eight representatives of the Bathybatini tribe were examined for monogenean infection. Morphological identification was based on parasite sclerotized structures. Geomorphometrics provided a visualization of the complex shape variation as an additional view to classical morphometrics. Molecular analyses were performed by means of established markers with different rates of molecular evolution preparing a dataset for population genetic approaches. Apparently, six out of eight studied cichlids are infected by a single monogenean species called Cichlidogyrus casuarinus. Significant morphological intraspecific variation related to host preference. On the other hand, no differentiation on the genetic level was documented. Monogeneans therefore have not followed speciation events of their hosts indicating an adaptation to lower host densities in this type of habitat. Our results support the previous suggestion of a decrease of parasite host specificity in the deepwater zone and form the first observation of this pattern in a freshwater ecosystem.

Návaznosti

GBP505/12/G112, projekt VaV

Název: ECIP - Evropské centrum ichtyoparazitologie

Investor: Grantová agentura ČR, ECIP - Evropské centrum ichtyoparazitologie

Citovat

KMENTOVÁ, Nikol; Milan GELNAR; Monika MENDLOVÁ; Van Steenberge MAARTEN; Stephan KOBLMÜLLER a Maarten Pieterjan VANHOVE. Decline in parasite diversity promoted by lower host densities in Lake Tanganyika. In European One Health/EcoHealth Workshop. 2016.

@proceedings{1368545,
   author = {Kmentová, Nikol and Gelnar, Milan and Mendlová, Monika and Maarten, Van Steenberge and Koblmüller, Stephan and Vanhove, Maarten Pieterjan},
   booktitle = {European One Health/EcoHealth Workshop},
   keywords = {host specificity; Bathybatini; cichlids; Monogenenea},
   language = {eng},
   title = {Decline in parasite diversity promoted by lower host densities in Lake Tanganyika},
   year = {2016}
}

TY  - CONF
ID  - 1368545
AU  - Kmentová, Nikol - Gelnar, Milan - Mendlová, Monika - Maarten, Van Steenberge - Koblmüller, Stephan - Vanhove, Maarten Pieterjan
PY  - 2016
TI  - Decline in parasite diversity promoted by lower host densities in Lake Tanganyika
KW  - host specificity
KW  - Bathybatini
KW  - cichlids
KW  - Monogenenea
N2  - Lake Tanganyika is a remarkable freshwater ecosystem characterised by high stability and a diversified fauna. Surprisingly, despite their high importance in ecosystems, parasites have been overlooked in most of the investigations but are getting more and more attention over the last years. A recent study revealed radiation events of monogenean parasites promoted by host speciation in the littoral zone. Monogeneans mainly occurring on freshwater and marine fishes and usually display strong host specificity related to their direct life cycle and long co-evolutionary processes. The main purpose of our study was testing diversity and speciation patterns of monogeneans infecting deepwater cichlids in the lake. In total, all eight representatives of the Bathybatini tribe were examined for monogenean infection. Morphological identification was based on parasite sclerotized structures. Geomorphometrics provided a visualization of the complex shape variation as an additional view to classical morphometrics. Molecular analyses were performed by means of established markers with different rates of molecular evolution preparing a dataset for population genetic approaches. Apparently, six out of eight studied cichlids are infected by a single monogenean species called Cichlidogyrus casuarinus. Significant morphological intraspecific variation related to host preference. On the other hand, no differentiation on the genetic level was documented. Monogeneans therefore have not followed speciation events of their hosts indicating an adaptation to lower host densities in this type of habitat. Our results support the previous suggestion of a decrease of parasite host specificity in the deepwater zone and form the first observation of this pattern in a freshwater ecosystem.
ER  -

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