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Early kit mortality and growth in farmed mink are affected by litter size rather than nest climate

Published online by Cambridge University Press:  20 February 2017

T. M. Schou  and
J. Malmkvist
T. M. Schou*
Affiliation:
Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
J. Malmkvist
Affiliation:
Department of Animal Science, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
*
†E-mail: [email protected]
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Abstract

We investigated the effects of nest box climate on early mink kit mortality and growth. We hypothesised that litters in warm nest boxes experience less hypothermia-induced mortality and higher growth rates during the 1st week of life. This study included data from 749, 1-year-old breeding dams with access to nesting materials. Kits were weighed on days 1 and 7, dead kits were collected daily from birth until day 7 after birth, and nest climate was measured continuously from days 1 to 6. We tested the influences of the following daily temperature (T) and humidity (H) parameters on the number of live-born kit deaths and kit growth: Tmean, Tmin, Tmax, Tvar (fluctuation) and Hmean. The nest microclimate experienced by the kits was buffered against the ambient climate, with higher temperatures and reduced climate fluctuation. Most (77.0%) live-born kit deaths in the 1st week occurred on days 0 and 1. Seven of 15 climate parameters on days 1 to 3 had significant effects on live-born kit mortality. However, conflicting effects among days, marginal effects and late effects indicated that climate was not the primary cause of kit mortality. Five of 30 climate parameters had significant effects on kit growth. Few and conflicting effects indicated that the climate effect on growth was negligible. One exception was that large nest temperature fluctuations on day 1 were associated with reduced deaths of live-born kit (P<0.001) and increased kit growth (P=0.003). Litter size affected kit vitality; larger total litter size at birth was associated with greater risks of kit death (P<0.001) and reduced growth (P<0.001). The number of living kits in litters had the opposite effect, as kits in large liveborn litters had a reduced risk of death (P<0.001) and those with large mean litter size on days 1 to 7 had increased growth (P=0.026). Nest box temperature had little effect on early kit survival and growth, which could be due to dams’ additional maternal behaviour. Therefore, we cannot confirm that temperature is the primary reason for kit mortality, under the conditions of plenty straw access for maternal nest building. Instead, prenatal and/or parturient litter size is the primary factor influencing early kit vitality. The results indicate that the focus should be on litter size and dam welfare around the times of gestation and birth to increase early kit survival in farmed mink.

Keywords

litter sizegrowthmortalitynest climateNeovison vison
Type
Research Article
Information
animal , Volume 11 , Issue 9 , September 2017 , pp. 1581 - 1589
Copyright
© The Animal Consortium 2017 

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References

Angilletta, MJ, Steury, TD and Sears, MW 2004. Temperature, growth rate, and body size in ectotherms: fitting pieces of a life-history puzzle. Integrative and Comparative Biology 44, 498–509.CrossRefGoogle ScholarPubMed
Bleu, J, Massot, M, Haussy, C and Meylan, S 2012. Experimental litter size reduction reveals costs of gestation and delayed effects on offspring in a viviparous lizard. Proceedings of the Royal Society of London B: Biological Sciences 279, 489–498.Google Scholar
Brandt, C, Malmkvist, J, Nielsen, RL, Brande-Lavridsen, N and Surlykke, A 2013. Development of vocalization and hearing in American mink (Neovison vison). Journal of Experimental Biology 216, 3542–3550.Google Scholar
Brown, RE, Mathieson, WB, Stapleton, J and Neumann, PE 1999. Maternal behavior in female C57BL/6J and DBA/2J inbred mice. Physiology & Behavior 67, 599–605.Google Scholar
Garnett, I and Rahnefeld, GW 1979. Factors affecting gestation length in the pig. Canadian Journal of Animal Science 59, 83–87.Google Scholar
Harjunpää, S and Rouvinen-Watt, K 2004. The development of homeothermy in mink (Mustela vison). Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 137, 339–348.Google Scholar
Hoy, S, Mengs, U and Wenzel, UD 1998. Einfluß der Gerburtmasse auf die lebendmasseentwicklung bis zum absetzen beim nerz (Mustela vison). Archiv Tierzucht 41, 497–504.Google Scholar
Hoy, S, Mengs, U and Wenzel, UD 2000. Untersuchungen zum einfluß der geburtsmasse auf die lebendmasseentwicklung von hundewelpen bis zum 20. lebenstag (Investigation on influence of birth weight on live weight development up to 20th day of age in dog pups). Archiv Tierzucht 41, 497–504.Google Scholar
Kostron, K and Kukla, F 1978. Changes of thermoregulation in mink kits within the 45 days of ontogenesis. Scientifur 2, 15–16.Google Scholar
Malmkvist, J, Gade, M and Damm, BI 2007. Parturient behaviour in farmed mink (Mustela vison) in relation to early kit mortality. Applied Animal Behaviour Science 107, 120–132.Google Scholar
Malmkvist, J, Houbak, B and Hansen, SW 1997. Mating time and litter size in farm mink selected for confident or timid behaviour. Animal Science 65, 521–525.Google Scholar
Malmkvist, J and Palme, R 2008. Periparturient nest building: implications for parturition, kit survival, maternal stress and behaviour in farmed mink (Mustela vison). Applied Animal Behaviour Science 114, 270–283.Google Scholar
Malmkvist, J and Palme, R 2015. Early transfer of mated females into the maternity unit reduces stress and increases maternal care in farm mink. Applied Animal Behaviour Science 167, 56–64.Google Scholar
Martino, PE and Villar, JA 1990. A survey on perinatal mortality in young mink. Veterinary Research Communications 14, 199–205.Google Scholar
Mellor, D and Stafford, K 2004. Animal welfare implications of neonatal mortality and morbidity in farm animals. The Veterinary Journal 168, 118–133.Google Scholar
Nowak, R, Porter, RH, Lévy, F, Orgeur, P and Schaal, B 2000. Role of mother–young interactions in the survival of offspring in domestic mammals. Reviews of Reproduction 5, 153–163.Google Scholar
Père, M-C and Etienne, M 2000. Uterine blood flow in sows: effects of pregnancy stage and litter size. Reproduction Nutrition Development 40, 369–382.Google Scholar
Quiniou, N, Dagorn, J and Gaudré, D 2002. Variation of piglets’ birth weight and consequences on subsequent performance. Livestock Production Science 78, 63–70.Google Scholar
Reynolds, LP, Ford, SP and Ferrell, CL 1985. Blood flow and steroid and nutrient uptake of the gravid uterus and fetus of sows. Journal of Animal Science 61, 968–974.Google Scholar
Rutherford, KMD, Baxter, EM, D’Eath, RB, Turner, SP, Arnott, G, Roehe, R, Ask, B, Sandøe, P, Moustsen, VA, Thorup, F, Edwards, SA, Berg, P and Lawrence, AB 2013. The welfare implications of large litter size in the domestic pig I: biological factors. Animal Welfare 22, 199–218.Google Scholar
Schneider, RR and Hunter, DB 1993. Mortality in mink kits from birth to weaning. Canadian Veterinary Journal (Revue Veterinaire Canadienne) 34, 159–163.Google Scholar
Seki, M, Watanabe, N, Ishii, K, Kinoshita, Y-i, Aihara, T, Takeiri, S and Otoi, T 2010. Influence of parity and litter size on gestation length in beagle dogs. Canadian Journal of Veterinary Research 74, 78–80.Google Scholar
Tauson, AH, Chwalibog, A and Tygesen, MP 2006. Late development of homoeothermy in mink (Mustela vison) kits – a strategy for maximum survival rate. Journal of Animal Physiology and Animal Nutrition 90, 38–45.Google Scholar
Tsutsui, T, Hori, T, Kirihara, N, Kawakami, E and Concannon, PW 2006. Relation between mating or ovulation and the duration of gestation in dogs. Theriogenology 66, 1706–1708.Google Scholar
Weber, EM, Hultgren, J, Olsson, IAS and Algers, B 2015. Nest quality and pup survival in laboratory mice given different conditions for maternal nest building. Pup mortality in laboratory mice. Doctorial thesis Swedish University of Agricultural Sciences, Skara 2015. ISBN (electronic version) 978-91-576-8211-6.Google Scholar