Comparison of Statistical Population Reconstruction Using Full and Pooled Adult Age-Class Data
نویسندگان
چکیده
BACKGROUND Age-at-harvest data are among the most commonly collected, yet neglected, demographic data gathered by wildlife agencies. Statistical population construction techniques can use this information to estimate the abundance of wild populations over wide geographic areas and concurrently estimate recruitment, harvest, and natural survival rates. Although current reconstruction techniques use full age-class data (0.5, 1.5, 2.5, 3.5, … years), it is not always possible to determine an animal's age due to inaccuracy of the methods, expense, and logistics of sample collection. The ability to inventory wild populations would be greatly expanded if pooled adult age-class data (e.g., 0.5, 1.5, 2.5+ years) could be successfully used in statistical population reconstruction. METHODOLOGY/PRINCIPAL FINDINGS We investigated the performance of statistical population reconstruction models developed to analyze full age-class and pooled adult age-class data. We performed Monte Carlo simulations using a stochastic version of a Leslie matrix model, which generated data over a wide range of abundance levels, harvest rates, and natural survival probabilities, representing medium-to-big game species. Results of full age-class and pooled adult age-class population reconstructions were compared for accuracy and precision. No discernible difference in accuracy was detected, but precision was slightly reduced when using the pooled adult age-class reconstruction. On average, the coefficient of variation (i.e., SE(θ)/θ) increased by 0.059 when the adult age-class data were pooled prior to analyses. The analyses and maximum likelihood model for pooled adult age-class reconstruction are illustrated for a black-tailed deer (Odocoileus hemionus) population in Washington State. CONCLUSIONS/SIGNIFICANCE Inventorying wild populations is one of the greatest challenges of wildlife agencies. These new statistical population reconstruction models should expand the demographic capabilities of wildlife agencies that have already collected pooled adult age-class data or are seeking a cost-effective method for monitoring the status and trends of our wild resources.
منابع مشابه
Assessment of the Relation of Mandibular Cortical Index and Gonial Angle Size in an Adult Iranian Population Using Digital Panoramic Radiography
Objectives: This study sought to assess the relation of mandibular cortical index (MCI) with age, gender and gonial angle size in an Iranian adult population using digital panoramic radiography. Methods: We evaluated 370 digital panoramic radiographs of patients and divided them into five 10-year age groups. Each radiograph was assigned to low (≤120°) or high (≥125°) angle grou...
متن کاملA Sociological Study of the Impact of Social Factors on Electoral Behavior (Comparison of Youth and Adult Age Study Group in Mazandaran Province)
The purpose of the present study is to investigate the sociological impact of social factors on the electoral behavior of citizens of Mazandaran province by comparing the two age groups of youth and adults. In this regard, a descriptive-analytical cross-sectional study was conducted using a researcher-made questionnaire. Statistical population of this study is men and women over 18 years old th...
متن کاملComparison of the Effectiveness of Semantic Cognitive Reconstruction Therapy and Self-Encouragement Therapy on Chronic Fatigue in People with Psychosomatic Skin
The purpose of this study was to the comparison of the effectiveness of semantic cognitive reconstruction therapy and self-encouragement therapy on chronic fatigue in people with psychosomatic skin. The research method was quasi-experimental with a pretest-posttest design with the control group. The statistical population of the study included people with psychosomatic skin who were referred to...
متن کاملVoice-based Age and Gender Recognition using Training Generative Sparse Model
Abstract: Gender recognition and age detection are important problems in telephone speech processing to investigate the identity of an individual using voice characteristics. In this paper a new gender and age recognition system is introduced based on generative incoherent models learned using sparse non-negative matrix factorization and atom correction post-processing method. Similar to genera...
متن کاملReconstruction of early Neolithic/Bronze Age population diversity in the Shamanka II cemetery at Lake Baikal using mtDNA polymorphism
Mitochondrial deoxyribonucleic acid (mtDNA) polymorphisms were examinedin bone samples of individuals buried inan early Neolithic (c. 5800–4900 BCE) hunter-gatherer cemetery, Shamanka II, located atthe southwestern tip of Lake Baikal, Siberia. The mainobjective was to compare the mtDNA polymorphisms observed at Shamanka II to those previously reportedfrom the Lokomotiv (early Neolithic) and Ust...
متن کامل