Morphology and coexistence of congeneric ectoparasite
species:reinforcement of reproductive isolation?

J 2002

Morphology and coexistence of congeneric ectoparasite species:reinforcement of reproductive isolation?

ŠIMKOVÁ, Andrea, Markéta ONDRAČKOVÁ, Milan GELNAR a Serge MORAND

Základní údaje

Originální název

Morphology and coexistence of congeneric ectoparasite species:reinforcement of reproductive isolation?

Autoři

ŠIMKOVÁ, Andrea (203 Česká republika, garant), Markéta ONDRAČKOVÁ (203 Česká republika), Milan GELNAR (203 Česká republika) a Serge MORAND (250 Francie)

Vydání

Biological Journal of the Linnean Society, 2002, 0024-4066

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 1.705

Kód RIV

RIV/00216224:14310/02:00007857

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000175718400011

Klíčová slova anglicky

competition; host specificity; morphometric distances; niche segregation; reproductive barriers; reinforcement

Štítky

competition, host specificity, morphometric distances, niche segregation, reinforcement, reproductive barriers

Změněno: 30. 5. 2003 13:34, prof. RNDr. Milan Gelnar, CSc.

Anotace

V originále

Several hypotheses to explain morphological differences among congeneric parasite species were tested, assuming that differences or similarities in morphology among congeners living in the same habitat are not a random pattern. These hypotheses were (1) reproductive isolation, (2) niche restriction due to competition, and (3) niche specialisation. Congeneric monogenean (platyhelminth) ectoparasites parasitising the gills of one host species were used as an ecological model. Morphometric distances of the attachment organ and morphometric distances of the copulatory organ between species pairs were used. Levins niche size and Renkonen niche overlap indices were calculated. Our results support the prediction that niche segregation has the function to achieve reproductive isolation of related species in order to prevent hybridisation (reinforcement of reproductive barriers). Parasite species living in the same niche greatly differ in the size of the copulatory organ. Moreover, species coexistence is facilitated by an increase in morphometric distances of copulatory organ and niche centres distances. Our results also show that species living in overlapping niches have similar attachment organs which supports the prediction that morphologically similar species have the same ecological requirements within one host and suggests small effects of interspecific competition for the evolution of morphological diversity of attachment organs. Specialist adaptations also seem to facilitate species coexistence and affect the niche distribution within host species. Parasite species that can colonise more than one host species, i.e. generalists, occupy more distant niches within host species than strictly host specific parasites.

Návaznosti

MSM 143100010, záměr

Název: Časoprostorová dynamika biodiverzity v ekosystémech střední Evropy.

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Časoprostorová dynamika biodiverzity v ekosystémech střední Evropy

Citovat

ŠIMKOVÁ, Andrea, Markéta ONDRAČKOVÁ, Milan GELNAR a Serge MORAND. Morphology and coexistence of congeneric ectoparasite species:reinforcement of reproductive isolation? Biological Journal of the Linnean Society. 2002, Neuveden, č. 76, s. 125-135. ISSN 0024-4066.

@article{487248,
   author = {Šimková, Andrea and Ondračková, Markéta and Gelnar, Milan and Morand, Serge},
   article_number = {76},
   keywords = {competition; host specificity; morphometric distances; niche segregation; reproductive barriers; reinforcement},
   language = {eng},
   issn = {0024-4066},
   journal = {Biological Journal of the Linnean Society},
   title = {Morphology and coexistence of congeneric ectoparasite species:reinforcement of reproductive isolation?},
   volume = {Neuveden},
   year = {2002}
}

TY  - JOUR
ID  - 487248
AU  - Šimková, Andrea - Ondračková, Markéta - Gelnar, Milan - Morand, Serge
PY  - 2002
TI  - Morphology and coexistence of congeneric ectoparasite species:reinforcement of reproductive isolation?
JF  - Biological Journal of the Linnean Society
VL  - Neuveden
IS  - 76
SP  - 125-135
EP  - 125-135
SN  - 00244066
KW  - competition
KW  - host specificity
KW  - morphometric distances
KW  - niche segregation
KW  - reproductive barriers
KW  - reinforcement
N2  - Several hypotheses to explain morphological differences among congeneric parasite species were tested, assuming that differences or similarities in morphology among congeners living in the same habitat are not a random pattern. These hypotheses were (1) reproductive isolation, (2) niche restriction due to competition, and (3) niche specialisation. Congeneric monogenean (platyhelminth) ectoparasites parasitising the gills of one host species were used as an ecological model. Morphometric distances of the attachment organ and morphometric distances of the copulatory organ between species pairs were used. Levins niche size and Renkonen niche overlap indices were calculated. Our results support the prediction that niche segregation has the function to achieve reproductive isolation of related species in order to prevent hybridisation (reinforcement of reproductive barriers). Parasite species living in the same niche greatly differ in the size of the copulatory organ. Moreover, species coexistence is facilitated by an increase in morphometric distances of copulatory organ and niche centres distances. Our results also show that species living in overlapping niches have similar attachment organs which supports the prediction that morphologically similar species have the same ecological requirements within one host and suggests small effects of interspecific competition for the evolution of morphological diversity of attachment organs. Specialist adaptations also seem to facilitate species coexistence and affect the niche distribution within host species. Parasite species that can colonise more than one host species, i.e. generalists, occupy more distant niches within host species than strictly host specific parasites.
ER  -

ŠIMKOVÁ, Andrea, Markéta ONDRAČKOVÁ, Milan GELNAR a Serge MORAND. Morphology and coexistence of congeneric ectoparasite species:reinforcement of reproductive isolation? \textit{Biological Journal of the Linnean Society}. 2002, Neuveden, č.~76, s.~125-135. ISSN~0024-4066.

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