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 Concept Videos

Keystone Species01:39

Keystone Species

24.9K
Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
24.9K
Truncation in Survival Analysis01:09

Truncation in Survival Analysis

623
Truncation in survival analysis refers to the exclusion of individuals or events from the dataset based on specific criteria related to the time of the event. This exclusion can happen in two primary forms: left truncation and right truncation.
Left truncation occurs when individuals who experienced the event of interest before a certain time are not included in the study. This is often due to a "delayed entry" into the study where only those who survive until a certain entry point are...
623
What is a Species?01:17

What is a Species?

50.5K
Overview
50.5K
Formation of Species01:31

Formation of Species

45.3K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
45.3K
What are Estimates?01:06

What are Estimates?

8.8K
It isn't easy to measure a parameter such as the mean height or the mean weight of a population. So, we draw samples from the population and calculate the mean height or mean weight of the individuals in the sample. This sample data acts as a representative measure of the population parameter. These sample statistics are known as estimates. 
The estimate for the mean of a sample is denoted by ͞x, whereas the mean of the population is designated as μ. Further, parameters such...
8.8K
Estimation of k and VD of Aminoglycosides01:20

Estimation of k and VD of Aminoglycosides

249
Aminoglycosides are a class of antibiotics used to treat various bacterial infections. Clinicians must determine the elimination rate constant (k) and volume of distribution (VD) to optimize therapeutic efficacy and minimize toxicity. The k value represents the rate at which the drug is removed from the body, and the VD reflects the degree to which the drug distributes into body tissues. Accurately estimating these parameters allows healthcare professionals to tailor drug dosing to individual...
249

You might also read

Related Articles

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

Sort by
Same author

Malaria in the First Trimester of Pregnancy and Fetal Growth: Results from a Beninese Preconceptional Cohort.

The Journal of infectious diseases·2022
Same author

On the Impossibility of Learning the Missing Mass.

Entropy (Basel, Switzerland)·2020
Same author

Multinomial Logistic Model for Coinfection Diagnosis Between Arbovirus and Malaria in Kedougou.

The international journal of biostatistics·2019
Same author

Instrumental variable analysis in the context of dichotomous outcome and exposure with a numerical experiment in pharmacoepidemiology.

BMC medical research methodology·2018
Same author

Transmission probabilities of HIV and herpes simplex virus type 2, effect of male circumcision and interaction: a longitudinal study in a township of South Africa.

AIDS (London, England)·2009
Same author

A pairwise alignment algorithm which favors clusters of blocks.

Journal of computational biology : a journal of computational molecular cell biology·2005

Related Experiment Video

Updated: Feb 7, 2026

Sampling for Estimating Frankliniella Species Flower Thrips and Orius Species Predators in Field Experiments
07:13

Sampling for Estimating Frankliniella Species Flower Thrips and Orius Species Predators in Field Experiments

Published on: July 17, 2019

9.8K

A Truncation Model for Estimating Species Richness.

Babagnidé François Koladjo1, Mesrob I Ohannessian2, Elisabeth Gassiat3

  • 1ENSPD, Universite de Parakou, Parakou, Benin.

The International Journal of Biostatistics
|July 27, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a new semiparametric truncation model for species richness estimation. The model accurately estimates species richness and vocabulary size, outperforming existing methods in simulations.

Keywords:
abundance distributionmodel selectionsemiparametric modelspecies richness

More Related Videos

Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations
12:09

Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations

Published on: January 8, 2013

14.1K
In Vivo Imaging of Reactive Oxygen Species in a Murine Wound Model
06:40

In Vivo Imaging of Reactive Oxygen Species in a Murine Wound Model

Published on: November 17, 2018

11.7K

Related Experiment Videos

Last Updated: Feb 7, 2026

Sampling for Estimating Frankliniella Species Flower Thrips and Orius Species Predators in Field Experiments
07:13

Sampling for Estimating Frankliniella Species Flower Thrips and Orius Species Predators in Field Experiments

Published on: July 17, 2019

9.8K
Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations
12:09

Patient-specific Modeling of the Heart: Estimation of Ventricular Fiber Orientations

Published on: January 8, 2013

14.1K
In Vivo Imaging of Reactive Oxygen Species in a Murine Wound Model
06:40

In Vivo Imaging of Reactive Oxygen Species in a Murine Wound Model

Published on: November 17, 2018

11.7K

Area of Science:

  • Ecology
  • Statistics
  • Computational Biology

Background:

  • Species richness estimation is crucial for biodiversity assessment.
  • Existing models often struggle with unknown truncation thresholds in abundance data.
  • Accurate estimation is vital for ecological and linguistic studies.

Purpose of the Study:

  • To propose a novel semiparametric truncation model for species richness estimation.
  • To develop a class of asymptotically efficient estimators for model parameters.
  • To generalize existing species richness estimators, like the Chaos lower bound estimator.

Main Methods:

  • Developed a semiparametric truncation model incorporating an unknown threshold.
  • Utilized conditional likelihood and stepwise maximization for parameter estimation.
  • Derived a species richness estimator by maximizing binomial likelihood.

Main Results:

  • Proposed estimators are asymptotically efficient under regularity conditions.
  • The model generalizes the Chaos lower bound estimator.
  • Simulation studies show favorable performance compared to existing methods.

Conclusions:

  • The proposed truncation model offers a robust and generalized approach to species richness estimation.
  • The method is effective for both ecological and linguistic applications, such as vocabulary size estimation.