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, Martina PEČÍNKOVÁ a Milan GELNAR. Sexual ornamentation and parasite infection in males of common bream (Abramis brama): a reflection of immunocompetence status or simple cost of reproduction? EVOLUTIONARY ECOLOGY RESEARCH. USA, roč. 7, č. 4, s. 581-593. ISSN 1522-0613. 2005.

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

• Originální 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
• Štítky: cost of reproduction, FISH, immunocompetence, parasitism, sexual ornamentation

Anotace

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.

Anotace 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

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• GP524/03/P108, projekt VaV: Název: Evolučně-ekologické aspekty v systému parazit-hostitel

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• MSM 143100010, záměr: Název: Časoprostorová dynamika biodiverzity v ekosystémech střední Evropy.

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