Effects of insect harassment on weight gain and survival in reindeer calves

  • Helle T
  • Tarvainen L
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Abstract

<p>Relationships between insect harassment and the weight gain and survival of reindeer calves were studied in two areas in Finland north of the Arctic Circle. The level of insect harassment explained a significant amount of the yearly variation in calf weights determined in autumn or early winter in both areas and directly influenced calf mortality in one of them. The lowest weights and calf percents were experienced in years when a bad winter was followed by a warm summer with severe insect harassment.</p><p>R&aring;k&aring;n vaikutus poronvasojen painonlis&aring;ykseen ja eloonj&aring;&aring;miseen.</p><p>Abstract in Finnish / Tiivistelmd: Rakan (vertaimevat ja porossa loisivat hyonteiset) vaikutusta vasojen painoon ja vasaprosenttiin tutkittiin Alakylan paliskunnassa sek&aring; Kaldoaivi - Paistunturin alueella. Kummallakin alueella rakka selitti huomattavan osan vasojen syyspainojen vuosivaihtelusta ja Kaldoaivi - Paistunturissa se vaikutti suoraan myos vasaprosenttiin. Vasojen painot ja vasaprosentit olivat alhaisimmat vuosina, joina vaikeaa talvea seurasi kuuma, hyonteisille suotuisa kesa.</p><p>Effekter av insektforstyrrelser p&aring; vekt&oslash;kning og overlevelse av reinkalver.</p><p>Abstract in Swedish / Sammendrag: Effekter av insektforstyrrelser p&aring; vekt&oslash;kning og overlevelse av reinkalver er studert i to omr&aring;der av Finland nord for Polarsirkelen. Graden av insektforstyrrelser forklarte en signifikant andel av variasjonene fra &aring;r til &aring;r i kalvevekter bestemt h&oslash;st eller tidlig vinter for begge omr&aring;der. Den virket ogs&aring; direkte inn p&aring; kalved&oslash;deligheten i et av omr&aring;dene. De laveste vekter og kalveprosenter fant man i &aring;r der en d&aring;rlig vinter ble etterfulgt av en varm sommer med alvorlige insektforstyrrelser.</p>

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APA

Helle, T., & Tarvainen, L. (2013). Effects of insect harassment on weight gain and survival in reindeer calves. Rangifer, 4(1), 24. https://doi.org/10.7557/2.4.1.488

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