Stochastic virtual population analysis

نویسندگان

  • M. Virtala
  • S. Kuikka
  • E. Arjas
چکیده

The Metropolis–Hastings algorithm was applied to a standard Virtual Population Analysis using a simulated data set containing catch data from 10 age groups over a 10-year period. Posterior distributions of fishing mortalities and population sizes are studied under different prior assumptions. The results demonstrate the usefulness of obtaining distributions of plausible parameter values instead of point estimates. Computational aspects of the algorithm are also discussed, as well as the estimation of the natural mortality.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Estimation of Otolithes ruber stock with virtual population analysis in the Northwest area of the Persian Gulf

Stock assessment of Otolithes ruber was carried out using Virtual Population Analysis (VPA) method in the coastal waters of Northwest Persian Gulf. Catch and length frequency data during 2002-2012 were converted to age frequency. The maximum of stock number and biomass were observed in age group 1 and 2 respectively. The minimum of stock number and biomass were observed age group 6. The maximum...

متن کامل

Virtual population analysis, recruitment pattern and cohort analysis of blue swimming crab, Portunus segnis (Forskal, 1775) in coastal waters of Persian Gulf and Gulf of Oman, Iran

This study was conducted to determine the virtual population analysis, recruitment pattern and cohort analysis of blue swimming crab (Portunus segnis) in coastal waters of the Persian Gulf and the Oman Sea (Hormozgan province). Sampling was carried out monthly by bottom trawl from May 2010 to October 2011. Results of Thompson and Bell prediction analysis showed that the maximum sustainable yiel...

متن کامل

The Prediction Dependency on Virtual Social Networks Based on Alexithymia, Attachment Styles, Well-Being Psychological and Loneliness

Introduction: Virtual social networks like others type of addiction can be affected by psychological, developmental, and emotional problems. So, the aim of this research is to The purpose of this study was to investigate prediction dependency on virtual social networks based on alexithymia, attachment styles, well-being psychological and loneliness. The research design was a two-group diagnosti...

متن کامل

Estimation of Otolithes ruber stock with virtual population analysis in the Northwest area of the Persian Gulf

Stock assessment of Otolithes ruber was carried out using Virtual Population Analysis (VPA) method in the coastal waters of Northwest area of the Persian Gulf. Catch and length frequency data during 2002-2012 were converted to age frequency. The maximum of stock number and biomass were observed in age group 1 and 2, respectively. The minimum stock number and biomass were observed for age group ...

متن کامل

Community Detection with the Non-Backtracking Operator

Community detection consists in identification of groups of similar items within a population. In the context of online social networks, it is a useful primitive for recommending either contacts or news items to users. We will consider a particular generative probabilistic model for the observations, namely the so-called stochastic block model and prove that the non-backtracking operator provid...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1998