最尤法による刺網の網目選択性曲線の推定法

• FUJIMORI YASUZUMI

  Division of Marine Environment and Resources, Hokkaido University

• TOKAI TADASHI

  Department of Marine Science and Technology, Tokyo University of Fisheries

書誌事項

タイトル別名

• Estimation of gillnet selectivity curve by maximum likelihood method.

抄録

A maximum likelihood method of estimating gillnet selectivity when data are obtained by gillnet fleets consisting of several nets of differing mesh size is presented in this paper. The SELECT model is expanded by application of the relative length (i.e. the ratio of fish length to mesh size) to obtain a master curve of gillnet selectivity. Four kinds of functional model, normal, lognormal, skew-normal and bi-normal are fitted to the data. In addition, two cases in which the relative fishing intensity is either estimated or fixed by catch effort are compared. The bi-normal model has the lower model deviance regardless of whether the relative fishing intensity is estimated or not. The estimation of relative fishing intensity by catch effort is also examined in which the estimates of the parameter of the SELECT model are compared with the catch effort as determined by the number of nets of each mesh size used. For the bi-normal model these quantities compare well. Thus, it is concluded that this method gives reliable estimates even if data for each mesh size is obtained with different catch efforts.

収録刊行物

• Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ

  Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ 67 (4), 644-654, 2001

  公益社団法人 日本水産学会

キーワード

• bi-normal
• catch effort
• gillnets
• maximum likelihood method
• SELECT model
• selectivity curve

詳細情報

• CRID: 1390001204429382144
• NII論文ID: 10008269900
• NII論文ID: 130003903599
• NII書誌ID: AA10993718
• DOI: 10.1046/j.1444-2906.2001.00301.x
• COI: 1:CAS:528:DC%2BD3MXmsFyntLw%3D
• ISSN: 14442906
• ISSN: 09199268
• HANDLE: 2115/622
• NDL書誌ID: 5892942
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5892942
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可