Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Line transect estimators for left-truncated distributions.

J R Alldredge, C E Gates

    Biometrics
    |March 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Sample size for monitoring of toxic chemical sites.

    Environmental monitoring and assessment·2013
    Same author

    Incidence and transmission of Mycoplasma bovis mastitis in Holstein dairy cows in a hospital pen: A case study.

    Preventive veterinary medicine·2010
    Same author

    Association between an outbreak strain causing mycoplasma bovis mastitis and its asymptomatic carriage in the herd: a case study from Idaho, USA.

    Preventive veterinary medicine·2009
    Same author

    Short communication: The effect of centrifugation and resuspension on the recovery of Mycoplasma species from milk.

    Journal of dairy science·2009
    Same author

    Estimation of actinide skeletal content in humans based on bone samples collected at autopsy.

    Health physics·2002
    Same author

    A patient with an electrical burn treated by modified bilateral hemipelvectomy and disarticulation of the right arm.

    The Journal of burn care & rehabilitation·2001
    Same journal

    Interim analysis in sequential multiple assignment randomized trials for survival outcomes.

    Biometrics·2026
    Same journal

    Acknowledgment of Referees 2025.

    Biometrics·2026
    Same journal

    Fast penalized generalized estimating equations for large longitudinal functional datasets.

    Biometrics·2026
    Same journal

    Causally-interpretable random-effects meta-analysis.

    Biometrics·2026
    Same journal

    Statistical inference for mean function of partially observed functional time series.

    Biometrics·2026
    Same journal

    Subgroup identification via Interaction Tree and Mixed Model for Repeated Measures with application to Alzheimer's disease.

    Biometrics·2026
    See all related articles

    Line transect sampling can be left-truncated when observers cannot view directly below. This study develops a general model and estimators for such data, demonstrating their validity with simulations and a dolphin survey example.

    Area of Science:

    • Wildlife population estimation
    • Ecological survey methodology
    • Statistical modeling in ecology

    Background:

    • Line transect sampling is widely used for wildlife surveys.
    • Left-truncation occurs when the observer's field of view is restricted, preventing detection of animals near the transect line.
    • This bias can significantly affect population estimates.

    Purpose of the Study:

    • To develop a general model for left-truncated line transect data.
    • To derive parametric estimators for population size under specific distribution assumptions.
    • To assess the performance of these estimators through simulations and a real-world case study.

    Main Methods:

    • Development of a general mathematical model for left-truncated line transect data.

    Related Experiment Videos

  • Derivation of parametric estimators assuming exponential or half-normal distributions for right-angle distances.
  • Computer simulations to evaluate estimator validity and robustness.
  • Application to an aerial survey dataset of dolphins.

    • Main Results:

    • The developed model and estimators are valid for left-truncated line transect data.
    • Simulations confirm the accuracy of the derived estimators.
    • The estimators show expected nonrobustness when the true distribution deviates from the assumed models.
    • The dolphin data example illustrates practical application.

    Conclusions:

    • A robust statistical framework is provided for handling left-truncated line transect data.
    • The derived estimators offer a reliable method for population estimation in specific scenarios.
    • Researchers should be aware of potential biases and the importance of appropriate distribution assumptions in line transect sampling.