2005
Sexual ornamentation and parasite infection in males of common bream (Abramis brama): a reflection of immunocompetence status or simple cost of reproduction?
OTTOVÁ, Eva, Andrea ŠIMKOVÁ, Pavel JURAJDA, Martina DÁVIDOVÁ, Markéta ONDRAČKOVÁ et. al.Základní údaje
Originální název
Sexual ornamentation and parasite infection in males of common bream (Abramis brama): a reflection of immunocompetence status or simple cost of reproduction?
Název česky
Sexual ornamentation and parasite infection in males of common bream (Abramis brama): a reflection of immunocompetence status or simple cost of reproduction?
Autoři
OTTOVÁ, Eva (203 Česká republika), Andrea ŠIMKOVÁ (203 Česká republika, garant), Pavel JURAJDA (203 Česká republika), Martina DÁVIDOVÁ (703 Slovensko), Markéta ONDRAČKOVÁ (203 Česká republika), Martina PEČÍNKOVÁ (203 Česká republika) a Milan GELNAR (203 Česká republika)
Vydání
EVOLUTIONARY ECOLOGY RESEARCH, USA, 2005, 1522-0613
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10600 1.6 Biological sciences
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 1.614
Kód RIV
RIV/00216224:14310/05:00013303
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000229868700005
Klíčová slova anglicky
cost of reproduction; fish; immunocompetence; parasitism; sexual ornamentation
Změněno: 8. 1. 2007 17:29, prof. RNDr. Andrea Vetešníková Šimková, PhD.
V originále
Abstract: Question: How does sexual ornamentation relate to parasite infection, host immune response and somatic condition status in male fish? Hypotheses: Zahavi's (1975) handicap hypothesis proposes that producing secondary sexual traits represents a considerable handicap for males. Additionally, Hamilton and Zuk (1982) proposed that the expression of secondary sexual traits reveals a genetic resistance against parasites. Organisms: Spawning males of common bream (Abramis brama) and several of its parasites (Gyrodactylus spp., Diplostomum spp., Argulus spp.). Variables: Parasite abundance (for parasite infection), spleen size (for host immune response) and condition (for somatic condition status). Results: The more tubercles on the fish, the more abundant the Gyrodactylus spp. The more tubercles on the fish's head, the more abundant the Diplostomum spp. The greater the mean length of the head tubercles, the more abundant the Gyrodactylus spp. and Argulus spp. However, we found no relationship between spleen size and either sexual ornamentation or parasite infection. Fish with larger spleens were in poorer somatic condition, but condition was not related to male ornamentation or parasite abundance. Conclusions: Males that develop more intensive sexual ornamentation are more susceptible to metazoan ectoparasite infection, supporting the hypothesis of Hamilton and Zuk. However, our results do not support the hypothesis that immunosuppression by steroid hormones reduces immunocompetence.
Česky
Abstract: Question: How does sexual ornamentation relate to parasite infection, host immune response and somatic condition status in male fish? Hypotheses: Zahavi's (1975) handicap hypothesis proposes that producing secondary sexual traits represents a considerable handicap for males. Additionally, Hamilton and Zuk (1982) proposed that the expression of secondary sexual traits reveals a genetic resistance against parasites. Organisms: Spawning males of common bream (Abramis brama) and several of its parasites (Gyrodactylus spp., Diplostomum spp., Argulus spp.). Variables: Parasite abundance (for parasite infection), spleen size (for host immune response) and condition (for somatic condition status). Results: The more tubercles on the fish, the more abundant the Gyrodactylus spp. The more tubercles on the fish's head, the more abundant the Diplostomum spp. The greater the mean length of the head tubercles, the more abundant the Gyrodactylus spp. and Argulus spp. However, we found no relationship between spleen size and either sexual ornamentation or parasite infection. Fish with larger spleens were in poorer somatic condition, but condition was not related to male ornamentation or parasite abundance. Conclusions: Males that develop more intensive sexual ornamentation are more susceptible to metazoan ectoparasite infection, supporting the hypothesis of Hamilton and Zuk. However, our results do not support the hypothesis that immunosuppression by steroid hormones reduces immunocompetence.
Návaznosti
| GA524/04/1128, projekt VaV |
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| GP524/03/P108, projekt VaV |
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| MSM 143100010, záměr |
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| MSM0021622416, záměr |
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