Are warbles and bots related to reproductive status in West Greenland caribou?
In March-April 2008-09, using CARMA protocols, 81 cows and 16 calves were collected in West Greenland from two caribou populations; Akia-Maniitsoq (AM) and Kangerlussuaq-Sisimiut (KS). In both populations, warble larvae numbers were highest in calves and higher in non-pregnant than pregnant cows. No...
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Septentrio Academic Publishing
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doaj-244b3bbf2e434c699c21262df64cc9942020-11-24T21:34:39ZengSeptentrio Academic PublishingRangifer1890-67292012-03-0132210.7557/2.32.2.22732121Are warbles and bots related to reproductive status in West Greenland caribou?Christine Cuyler0Robert R. White1Keith LewisColleen SoulliereAnne GunnDon E. RussellColin DanielGreenland Institute of Natural Resources, P.O. Box 570, 3900 Nuuk, GreenlandOffice of Research & Graduate Studies, University of Alaska Anchorage, Anchorage, Alaska USA. & Institute of Arctic Biology, University of Alaska Fairbanks, 500M St #304, Anchorage, Alaska 99501In March-April 2008-09, using CARMA protocols, 81 cows and 16 calves were collected in West Greenland from two caribou populations; Akia-Maniitsoq (AM) and Kangerlussuaq-Sisimiut (KS). In both populations, warble larvae numbers were highest in calves and higher in non-pregnant than pregnant cows. Nose bots showed no relationship with pregnancy or lactation; KS calves had higher nose bot loads than cows, a pattern not observed in AM. Pregnant cows had more rump fat than non-pregnant cows. KS cows lacking rump fat entirely had the highest warble burdens. We observed lactating pregnant cows with moderate larval burdens. Projected energy cost of the heaviest observed combined larvae burdens was equivalent to 2-5 days basal metabolic rate (BMR) for a cow, and 7-12 days BMR for a calf. Foregone fattening in adult cows with average burdens was 0.2 to 0.5 kg, but almost doubled with the heaviest infestations to 0.4 and 0.8 kg. Average burdens in calves resulted in forgone fattening of about 0.5 kg, with peak costs equivalent to 0.7 and 1.1 kg fat for AM and KS calves respectively. Although modest, these projected energy costs of hosting larvae for cows support the negative relationship between rump fat and larvae burden. For calves, hosting high burdens of warble larvae could affect winter survival, specifically those weaned normally in October or in early winter. Harmful effects of oestrid larvae burdens may remain subtle but clearly cumulative in relation to seasonal forage availability and incidence of other parasites.https://septentrio.uit.no/index.php/rangifer/article/view/2273energeticsnose bot larvaeoestridaeRangiferreproductionsurvival |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Christine Cuyler Robert R. White Keith Lewis Colleen Soulliere Anne Gunn Don E. Russell Colin Daniel |
spellingShingle |
Christine Cuyler Robert R. White Keith Lewis Colleen Soulliere Anne Gunn Don E. Russell Colin Daniel Are warbles and bots related to reproductive status in West Greenland caribou? Rangifer energetics nose bot larvae oestridae Rangifer reproduction survival |
author_facet |
Christine Cuyler Robert R. White Keith Lewis Colleen Soulliere Anne Gunn Don E. Russell Colin Daniel |
author_sort |
Christine Cuyler |
title |
Are warbles and bots related to reproductive status in West Greenland caribou? |
title_short |
Are warbles and bots related to reproductive status in West Greenland caribou? |
title_full |
Are warbles and bots related to reproductive status in West Greenland caribou? |
title_fullStr |
Are warbles and bots related to reproductive status in West Greenland caribou? |
title_full_unstemmed |
Are warbles and bots related to reproductive status in West Greenland caribou? |
title_sort |
are warbles and bots related to reproductive status in west greenland caribou? |
publisher |
Septentrio Academic Publishing |
series |
Rangifer |
issn |
1890-6729 |
publishDate |
2012-03-01 |
description |
In March-April 2008-09, using CARMA protocols, 81 cows and 16 calves were collected in West Greenland from two caribou populations; Akia-Maniitsoq (AM) and Kangerlussuaq-Sisimiut (KS). In both populations, warble larvae numbers were highest in calves and higher in non-pregnant than pregnant cows. Nose bots showed no relationship with pregnancy or lactation; KS calves had higher nose bot loads than cows, a pattern not observed in AM. Pregnant cows had more rump fat than non-pregnant cows. KS cows lacking rump fat entirely had the highest warble burdens. We observed lactating pregnant cows with moderate larval burdens. Projected energy cost of the heaviest observed combined larvae burdens was equivalent to 2-5 days basal metabolic rate (BMR) for a cow, and 7-12 days BMR for a calf. Foregone fattening in adult cows with average burdens was 0.2 to 0.5 kg, but almost doubled with the heaviest infestations to 0.4 and 0.8 kg. Average burdens in calves resulted in forgone fattening of about 0.5 kg, with peak costs equivalent to 0.7 and 1.1 kg fat for AM and KS calves respectively. Although modest, these projected energy costs of hosting larvae for cows support the negative relationship between rump fat and larvae burden. For calves, hosting high burdens of warble larvae could affect winter survival, specifically those weaned normally in October or in early winter. Harmful effects of oestrid larvae burdens may remain subtle but clearly cumulative in relation to seasonal forage availability and incidence of other parasites. |
topic |
energetics nose bot larvae oestridae Rangifer reproduction survival |
url |
https://septentrio.uit.no/index.php/rangifer/article/view/2273 |
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