4.6 Article

Why Herd Size Matters - Mitigating the Effects of Livestock Crashes

Journal

PLOS ONE
Volume 8, Issue 8, Pages -

Publisher

PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0070161

Keywords

-

Funding

  1. Research Council of Norway (the FRISAM program) [204174]

Ask authors/readers for more resources

Analysing the effect of pastoral risk management strategies provides insights into a system of subsistence that have persevered in marginal areas for hundreds to thousands of years and may shed light into the future of around 200 million households in the face of climate change. This study investigated the efficiency of herd accumulation as a buffer strategy by analysing changes in livestock holdings during an environmental crisis in the Saami reindeer husbandry in Norway. We found a positive relationship between: (1) pre- and post-collapse herd size; and (2) pre-collapse herd size and the number of animals lost during the collapse, indicating that herd accumulation is an effective but costly strategy. Policies that fail to incorporate the risk-beneficial aspect of herd accumulation will have a limited effect and may indeed fail entirely. In the context of climate change, official policies that incorporate pastoral risk management strategies may be the only solution for ensuring their continued existence.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

Article Ecology

Temporal changes in the relative abundance of anadromous Arctic charr, brown trout, and Atlantic salmon in northern Europe: Do they reflect changing climates?

Martin-A. Svenning, Morten Falkegard, J. Brian Dempson, Michael Power, Bard-Jorgen Bardsen, Gudni Guobergsson, Per Fauchald

Summary: Warming temperatures due to climate change may affect the distribution and abundance of freshwater fish species, with different species showing varying responses to temperature changes. A study in northern Europe found that increased temperatures led to changes in the catch composition of anadromous salmonids, with Arctic charr decreasing and brown trout increasing in proportion. Atlantic salmon remained stable in relative catch.

FRESHWATER BIOLOGY (2022)

Article Infectious Diseases

Chronic wasting disease in Norway-A survey of prion protein gene variation among cervids

Mariella Evelyn Guere, Jorn Vage, Helene Tharaldsen, Kjersti Sternang Kvie, Bard-Jorgen Bardsen, Sylvie Lafond Benestad, Turid Vikoren, Knut Madslien, Christer Moe Rolandsen, Michael Andreas Tranulis, Knut Hakon Roed

Summary: The susceptibility of cervids to Chronic Wasting Disease (CWD) in Norway is modulated by variations in the prion protein gene (PRNP), with different species having different levels of susceptibility. The PRNP genetic data indicate considerable susceptibility to CWD among Norwegian cervids, and suggest that PRNP homozygosity may be a risk factor for the atypical CWD observed in moose. The CWD isolates found in Norwegian cervids differ from those previously found in Canada and USA, indicating potential strain dynamics related to PRNP variability.

TRANSBOUNDARY AND EMERGING DISEASES (2022)

Article Environmental Sciences

Telomere length in relation to persistent organic pollutant exposure in white-tailed eagle (Haliaeetus albicilla) nestlings from Sweden sampled in 1995-2013

Elisabeth Hansen, Tove Skotnes, Jan Ove Bustnes, Bjorn Helander, Igor Eulaers, Jiachen Sun, Adrian Covaci, Bard-Jorgen Bardsen, Sandrine Zahn, Francois Criscuolo, Sophie Bourgeon

Summary: This study investigated telomere lengths in white-tailed eagle nestlings and found significant year-to-year variations, but no correlation with concentrations of persistent organic pollutants.

ENVIRONMENTAL RESEARCH (2022)

Article Environmental Sciences

Temporal Trends of Organochlorine and Perfluorinated Contaminants in a Terrestrial Raptor in Northern Europe Over 34 years (1986-2019)

Jan Ove Bustnes, Bard-Jorgen Bardsen, Dorte Herzke, Georg Bangjord, Sophie Bourgeon, Clementine Fritsch, Igor Eulaers

Summary: The concentrations of legacy organochlorines and perfluoroalkyl substances in tawny owl eggs in central Norway have shown varying trends over the past few decades. Most legacy OCs and PFOS have not reached a lower threshold with stable background levels, and voluntary elimination of perfluoroalkyl carboxylates has not resulted in declining levels in tawny owls in central Norway.

ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY (2022)

Article Ornithology

Multiple stressors: negative effects of nest predation on the viability of a threatened gull in different environmental conditions

Bard-Jorgen Bardsen, Jan Ove Bustnes

Summary: The majority of the world's seabirds are experiencing population declines, with nest predation being identified as a potentially important mechanism. This study assessed the population viability of the lesser black-backed gull under different scenarios of nest predation and environmental conditions, and found that nest predation played a vital role in limiting population growth.

JOURNAL OF AVIAN BIOLOGY (2022)

Article Anthropology

Consequences of COVID-19 on the Reindeer Husbandry in Norway: a Pilot Study Among Management Staff and Herders

Guro Lovise Hole Fisktjonmo, Marius Warg Naess

Summary: The outbreak of COVID-19 has had varying impacts on Norwegian reindeer husbandry and its management system. Reindeer herders experienced little to no impact on their daily work, but faced negative effects on work in corrals, income, and slaughter. Employees in the management system faced challenges in communication, visits, and control. While the government's communication of COVID-19 information and prevention measures satisfied the employees, the herders were dissatisfied.

HUMAN ECOLOGY (2022)

Article Environmental Sciences

Ecosystem specific accumulation of organohalogenated compounds: A comparison between adjacent freshwater and terrestrial avian predators

Jan Ove Bustnes, Bard-Jorgen Bardsen, Dorte Herzke, Georg Bangjord, Sophie Bourgeon, Clementine Fritsch, Igor Eulaers

Summary: This study compared the exposure of organohalogenated contaminants (OHCs) in two avian predator species in different ecosystems. The results showed that the proportional distribution of OHCs and PFASs was similar in the two species. However, the concentrations of PFASs were higher in goldeneye ducks than in tawny owls. The main OC components in goldeneyes were persistent polychlorinated biphenyls (PCBs), while OC-pesticides dominated in tawny owls. Moreover, most OC pesticides and less persistent PCB101 declined in concentration in both species, while PFOS declined in tawny owls but remained stable in goldeneyes.

ENVIRONMENTAL RESEARCH (2022)

Article Ecology

Hunting for ecological indicators: are large herbivore skeleton measures from harvest data useful proxies for monitoring?

Ashild O. Pedersen, Bard-Jorgen Bardsen, Vebjorn Veiberg, Robert Justin Irvine, Brage B. Hansen

Summary: Hunter-collected data and samples are used to monitor the population performance of high Arctic reindeer. Skeleton size measurements, such as lower jawbone length and hind-leg length, can serve as good predictors of carcass mass, especially in young age classes. However, the relationships weaken in adults due to skeletal growth ceasing and increased variance in mass with age, potentially caused by annual environmental fluctuations.

EUROPEAN JOURNAL OF WILDLIFE RESEARCH (2023)

Article Environmental Sciences

The impact of climate sensitive factors on the exposure to organohalogenated contaminants in an aquatic bird exploiting both marine and freshwater habitats

Jan Ove Bustnes, Bard-Jorgen Bardsen, Dorte Herzke, Georg Bangjord, Eric Bollinger, Sophie Bourgeon, Ralf Schulz, Clementine Fritsch, Igor Eulaers

Summary: This study monitored the concentrations of organochlorines (OCs) and perfluoroalkyl substances (PFASs) in eggs of the common goldeneye in central Norway over two decades. The results suggest that factors such as diet and egg laying date, as well as winter climate, are associated with the exposure to OCs in goldeneyes.

SCIENCE OF THE TOTAL ENVIRONMENT (2022)

Article Environmental Sciences

Long-term monitoring of exposure to toxic and essential metals and metalloids in the tawny owl (Strix aluco): Temporal trends and influence of spatial patterns

Quentin Devalloir, Clementine Fritsch, Georg Bangjord, Bard-J Bardsen, Sophie Bourgeon, Igor Eulaers, Jan O. Bustnes

Summary: Due to regulations, the deposition of most toxic metals and metalloids in Europe has decreased over the past few decades. However, little is known about the impact of this reduction on exposure levels in terrestrial food webs. This study used tawny owls as biomonitoring species to investigate temporal and spatial trends of exposure to these elements. The results showed a significant decline in toxic elements over time, while beneficial elements exhibited fluctuations but an overall decline. The distance to potential sources of contamination influenced the spatial patterns and temporal trends of element concentrations.

SCIENCE OF THE TOTAL ENVIRONMENT (2023)

Article Ecology

Shifts in risk sensitivity and resource availability alter fat stores for a large mammal following extreme winter conditions

Tayler N. LaSharr, Rhiannon P. Jakopak, Bard-Jorgen Bardsen, Timothy J. Robinson, Samantha P. H. Dwinnell, Jill Randall, Rusty C. Kaiser, Mark Thonhoff, Brandon Scurlock, Troy Fieseler, Neil Hymas, Kevin L. Monteith

Summary: The balance of resource allocation to life-history traits can have significant consequences for survival, reproduction, and fitness for species in unpredictable environments. Environmental severity, food availability, and population size all influence the allocation of resources in animals. Animals facing extreme resource limitation may allocate resources to body reserves for survival at the cost of reproduction. In contrast, animals in relatively benign landscapes may allocate resources to reproduction. The theory of risk-sensitive allocation suggests that animals may shift resource allocation to building capital over reproduction when exposed to unprecedented or life-threatening conditions. This study on mule deer found that a life-threatening winter and a reduction in population abundance influenced how animals acquired and allocated energy to survival. Fat accumulation was influenced by per capita precipitation and the reduction in population abundance. Fat accrual in preparation for winter was associated with shifts in risk tolerance, supporting the idea of risk-sensitive allocation as an essential adaptation for animals in rapidly changing landscapes.

FUNCTIONAL ECOLOGY (2023)

Correction Ornithology

Multiple stressors: negative effects of nest predation on the viability of a threatened gull in different environmental conditions (vol 2022, e02953, 2022)

B. J. Bardsen, J. Ove Bustnes

Summary: This article examines the negative impacts of multiple stressors, specifically nest predation, on the viability of a threatened gull. The study finds that the effect varies depending on different environmental conditions.

JOURNAL OF AVIAN BIOLOGY (2023)

Article Humanities, Multidisciplinary

Wealth of nomads - an exploratory analysis of livestock inequality in the Saami reindeer husbandry

Marius Warg Naess, Bard-Jorgen Bardsen

Summary: The evolution of political complexity has always been an important issue in humanities and social sciences. Despite the pervasiveness of social inequality in contemporary societies, livestock, as the main source of wealth, does not limit the development of inequalities in pastoral societies. A study on reindeer herding in Norway shows that while there are improvements in wealth inequality, rank differences still persist over time. This indicates that pastoral wealth inequality follows a similar pattern to other forms of wealth, where high earners can accumulate more wealth, leading to significant wealth inequality.

HUMANITIES & SOCIAL SCIENCES COMMUNICATIONS (2023)

Article Psychology, Multidisciplinary

Resemblance Reporting on Children: Sisters Are More Proactive than Brothers

Guro Lovise Hole Fisktjonmo, Bard-Jorgen Bardsen, Ivar Folstad

Summary: The asymmetric grandparental investment in humans may be explained by the paternity uncertainty hypothesis. However, the specific mechanisms leading to grandparental bias in investment in grandchildren are unclear. A study found that comments on resemblance of children occurred more frequently among siblings after both became parents, suggesting that resemblance descriptions may become more important after both siblings have children. Furthermore, sisters were more proactive in commenting on resemblance of their brothers' child, potentially influencing alloparents' perception of resemblance and influencing alloparental investments.

EVOLUTIONARY PSYCHOLOGICAL SCIENCE (2023)

Article Ornithology

Reproductive success of threatened northern Lesser Black-backed Gulls (Larus fuscus fuscus) in relation to nest predation by Ravens (Corvus corax)

Jan Ove Bustnes, Morten Helberg, Bard-Jorgen Bardsen

Summary: This study analyzes the reproductive output of the northern Lesser Black-backed Gull in relation to the occurrence of breeding Ravens. The study finds that the breeding and fledglings brought by Ravens result in a high nest predation rate and a decline in the number of gulls. It also finds that the number of gulls does not decline in neighboring colonies without Ravens.

ORNIS FENNICA (2022)

No Data Available