Estimating grizzly and black bear population abundance and trend in Banff National Park using noninvasive genetic sampling.

PloS One
Michael A SawayaSteven T Kalinowski

Abstract

We evaluated the potential of two noninvasive genetic sampling methods, hair traps and bear rub surveys, to estimate population abundance and trend of grizzly (Ursus arctos) and black bear (U. americanus) populations in Banff National Park, Alberta, Canada. Using Huggins closed population mark-recapture models, we obtained the first precise abundance estimates for grizzly bears (N= 73.5, 95% CI = 64-94 in 2006; N= 50.4, 95% CI = 49-59 in 2008) and black bears (N= 62.6, 95% CI = 51-89 in 2006; N= 81.8, 95% CI = 72-102 in 2008) in the Bow Valley. Hair traps had high detection rates for female grizzlies, and male and female black bears, but extremely low detection rates for male grizzlies. Conversely, bear rubs had high detection rates for male and female grizzlies, but low rates for black bears. We estimated realized population growth rates, lambda, for grizzly bear males (λ= 0.93, 95% CI = 0.74-1.17) and females (λ= 0.90, 95% CI = 0.67-1.20) using Pradel open population models with three years of bear rub data. Lambda estimates are supported by abundance estimates from combined hair trap/bear rub closed population models and are consistent with a system that is likely driven by high levels of human-caused mortality. Our results ...Continue Reading

References

Jun 1, 1995·Molecular Ecology·D PaetkauC Strobeck
May 21, 2008·Ecological Applications : a Publication of the Ecological Society of America·John BoulangerDavid Paetkau
Mar 30, 2010·Molecular Ecology·Marine MurtskhvaladzeDavid Tarkhnishvili
Jul 19, 2011·Science·James A EstesDavid A Wardle

❮ Previous
Next ❯

Citations

Feb 21, 2014·Proceedings. Biological Sciences·Michael A SawayaAnthony P Clevenger
Jul 30, 2014·PloS One·Fernando AscensãoMargarida Santos-Reis
Jun 6, 2015·Ecotoxicology·T BechshoftV L St Louis
Jun 18, 2014·Isotopes in Environmental and Health Studies·John B HopkinsColleen Cassady St Clair
Mar 27, 2019·Ecological Applications : a Publication of the Ecological Society of America·Clayton T LambStan Boutin
Jul 30, 2019·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Colleen Cassady St ClairSonya Pollock
Dec 18, 2015·PloS One·Vinícius Silva BeloClaudio José Struchiner
Apr 14, 2016·Ecology·Howard B WilsonHugh P Possingham
Jan 27, 2019·Ecology and Evolution·Anne E LoosenMark S Boyce

❮ Previous
Next ❯

Methods Mentioned

BETA
genotyping

Software Mentioned

Pradel
MARK
DROPOUT

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.