Dogs as a tool to improve bird-strike mortality estimates at wind farms

Abstract Management of avian populations near anthropogenic infrastructures, specifically wind farms, has been hampered due to biased bird fatalities estimates. Currently, these estimations are based on field surveys performed by humans, which is a method with low efficiency and accuracy. Detection dogs have been used for decades to assist humans, and their use for wildlife surveys is of increasing interest to scientists and wildlife managers. We evaluate the accuracy rates of human and dog-handler teams in real field conditions to address if dogs could be used instead of humans for bird carcass searches. Furthermore, to verify the efficiency of detection dogs (determined by the time spent to detect each bird carcass) searching for bird carcasses, we investigate the influence of several factors that affect the performance of dogs (carcass decomposition condition, distance to the target and weather conditions). Results indicate that dogs are more accurate than humans, independently of vegetation density. Furthermore, carcass decomposition condition, distances to the carcass and weather conditions significantly affect the efficiency of working dogs. The influence of these factors on detection time was minor. Results demonstrate the usefulness of dogs in field surveys to improve bird-strike mortality estimates at wind farms and other anthropogenic structures that cause bird fatalities worldwide.

[1]  David W. Hosmer,et al.  Applied Logistic Regression , 1991 .

[2]  G. Linz,et al.  Dogs increase recovery of passerine carcasses in dense vegetation , 2001 .

[3]  J. Heaton,et al.  Are Wildlife Detector Dogs or People Better at Finding Desert Tortoises (Gopherus Agassizii) , 2008 .

[4]  K. Ralls,et al.  Canine Assistants for Conservationists , 2001, Science.

[5]  Wallace P. Erickson,et al.  A summary and comparison of bird mortality from anthropogenic causes with an emphasis on collisions , 2005 .

[6]  G. Stenhouse,et al.  Scat detection dogs in wildlife research and management: application to grizzly and black bears in the Yellowhead ecosystem, Alberta, Canada , 2004 .

[7]  Miguel Ferrer,et al.  The effects of a wind farm on birds in a migration point: the Strait of Gibraltar , 2004, Biodiversity & Conservation.

[8]  J. Faraway.  Extending the Linear Model with R: Generalized Linear, Mixed Effects and Nonparametric Regression Models , 2005 .

[9]  LINDA L. KERLEY,et al.  Using Scent-Matching Dogs to Identify Individual Amur Tigers from Scats , 2007 .

[10]  Mary E Cablk,et al.  Accuracy and reliability of dogs in surveying for desert tortoise (Gopherus agassizii). , 2006, Ecological applications : a publication of the Ecological Society of America.

[11]  John C. Sagebiel,et al.  Olfaction-based Detection Distance: A Quantitative Analysis of How Far Away Dogs Recognize Tortoise Odor and Follow It to Source , 2008, Sensors.

[12]  J. Buzas,et al.  Comparing Scat Detection Dogs, Cameras, and Hair Snares for Surveying Carnivores , 2007 .

[13]  K. F. Higgins,et al.  Bird Mortality Associated with Wind Turbines at the Buffalo Ridge Wind Resource Area, Minnesota , 2000 .

[14]  M. Morrison.  Searcher Bias and Scavenging Rates in Bird/Wind Energy Studies , 2002 .

[15]  Stanley Lemeshow,et al.  Applied Logistic Regression, Second Edition , 1989 .

[16]  L. Silveira,et al.  Ecology of the Giant Armadillo (Priodontes maximus) in the Grasslands of Central Brazil , 2009 .

[17]  G. Linz,et al.  SURVIVAL OF AVIAN CARCASSES AND PHOTOGRAPHIC EVIDENCE OF PREDATORS AND SCAVENGERS , 2001 .

[18]  E. Arnett,et al.  A Preliminary Evaluation on the Use of Dogs to Recover Bat Fatalities at Wind Energy Facilities , 2006 .

[19]  P. Prosser,et al.  Rate of removal of bird carcasses in arable farmland by predators and scavengers. , 2008, Ecotoxicology and environmental safety.

[20]  S. Wasser,et al.  Scent-Matching Dogs Determine Number of Unique Individuals From Scat , 2009 .

[21]  K. J. Gutzwiller.  MINIMIZING DOG-INDUCED BIASES IN GAME BIRD RESEARCH , 1990 .

[22]  Jader Marinho-Filho,et al.  Effectiveness of Scat‐Detection Dogs in Determining Species Presence in a Tropical Savanna Landscape , 2011, Conservation biology : the journal of the Society for Conservation Biology.

[23]  Katherine Ralls,et al.  Detection and accuracy rates of dogs trained to find scats of San Joaquin kit foxes (Vulpes macrotis mutica) , 2003 .

[24]  R. Langston,et al.  Collision Effects of Wind‐power Generators and Other Obstacles on Birds , 2008, Annals of the New York Academy of Sciences.

[25]  J. Buzas,et al.  Effectiveness of Scat Detection Dogs for Detecting Forest Carnivores , 2007 .

[26]  K. S. Smallwood,et al.  Estimating Wind Turbine–Caused Bird Mortality , 2007 .