Variation in Haematological Indices and Immune Function During the Annual Cycle in the Great Tit Parus major

Ardea

Jácint Tökölyi³  Gábor Á. Czirják²  Zoltán Barta³  Péter L. Pap¹  Csongor I. Vágási¹ 

[1] 1 Dept Taxonomy and Ecology, BabeÅŸ-Bolyai University, RO—400006 Cluj Napoca, Clinicilor Street 5–7, Romania 2 Behavioura Ecology Research Group, Dept Evolutionary Zoology, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary;3 Dept Infectious Diseases, Faculty of Veterinary Medicine, University of Agricultural Sciences and Veterinary Medicine, RO-400372 Cluj-Napoca, Mănăştur Street 3–5, Romania;2 Behavioura Ecology Research Group, Dept Evolutionary Zoology, University of Debrecen, H-4032 Debrecen, Egyetem tér 1, Hungary

关键词: White Blood Cells;   

DOI  :  

学科分类：动物科学

来源: Nederlandse Ornithologische Unie/Netherlands Ornithological Union

【 摘 要 】

Weinvestigatedseasonalvariationinhaematologicalindicesandimmunefunctioninthenon-migratoryGreatTitParusmajoroveracompleteannualcycle.Thehaematocritvalueshowedamarkedreductioninspringandsummer,reachingalowestvalueduringmoult,afterwhichitincreasedtoreachamaximuminwinterandspring.Thepeakintheheterophiltolymphocyteratio(H/L)duringJulyindicatedthatGreatTitswerethemoststressedduringthefirsthalfofthemoultingperiod.TheincreaseinheterophilsandH/Lratio,concurrentwithareducednumberoflymphocytesduringthebreedingseason,probablyreflectedthecostofreproductionintermsofphysiologicalstressandimmunesuppression.AfterbreedingthenumberofheterophilsandtheH/Lratiodecreased,reachingalowestvalueduringwinter.Theconcentrationofimmunoglobulinsfollowedtheseasonalpatterninthenumberofheterophils,thoughhighestvaluesoccurredsomewhatlater,inJuly–Septemberduringthesecondpartofthemoultingperiod,Ourobservationsindicatedlargedifferencesinactivitythroughouttheyearofdifferentcomponentsoftheimmunesystem,Thissuggestsdifferencesinfunctionamongthecomponentsandpossiblydifferencesinsusceptibilitytostress,parasitismandhormonesduringtheannualcycle.Whenjuvenilesbecameindependentoftheirparents,theimmunoglobulinconcentrationincreased,whereasotherimmunemeasuresdidnotshowasignificantchange.Thisindicatesarapidincreaseofatleastonecomponentoftheimmunesystemaftertheyoungfledge.

【 授权许可】

Unknown