A simple method for ecological risk assessment of fish populations

• KATSUKAWA Yuu

  University of Tokyo, Ocean Research Institute

• MIYAMOTO Ken-ichi

  National Institute of Advanced Industrial Science and Technology, Research Center for Chemical Risk Management

• MATSUDA Hiroyuki

  University of Tokyo, Ocean Research Institute

• NAKANISHI Junko

  National Institute of Advanced Industrial Science and Technology, Research Center for Chemical Risk Management

Bibliographic Information

Other Title

• 魚類個体群の生態リスクの簡易評価手法
• 実践報告 魚類個体群の生態リスクの簡易評価手法
• ジッセン ホウコク ギョルイ コタイグン ノ セイタイ リスク ノ カンイ ヒョウカ シュホウ

Abstract

Population growth rate has been used as an index for assessing the ecological risk of toxic chemicals. However, the survival of young fish is difficult to estimate, and obtaining an accurate value for the rate of population growth is problematic. In order to focus on toxic chemicals, we defined decreases in population growth rate (Δγ), calculated using an age-structured model, as a measure of ecological risk. The measure Δγ is robust to the errors in juvenile fish survival estimates, and depends on the toxic effects of chemicals in relation to aspects of life history, such as decreased survival and fecundity. The index Δγ has the following advantages: (1) risks to organisms with different life histories can be compared, (2) the effects on different life stages, such as fertilization, hatching or larval survival can be evaluated, (3) Δγ is robust to measurement errors in life history parameters, and (4) Δγ can be used to assess the effects of harvesting. The measure Δγ can be applied not only to fish populations but also to other wildlife populations. Demographic parameters for age-structured models were extrapolated from empirical data on other species, and included data on age-specific fecundity, maturation age, maximum age, and mortality rate. We tested this approach for bluegill (Lepomis macrochirus), and for the extrapolation model.

Journal

• Japanese Journal of Conservation Ecology

  Japanese Journal of Conservation Ecology 9 (1), 83-92, 2004

  The Ecological Society of Japan

Keywords

• Ecological risk assessment
• Age-structured model
• Fish
• Population growth rate

Details

• CRID: 1390001205207969024
• NII Article ID: 110004741103
• NII Book ID: AA11857952
• DOI: 10.18960/hozen.9.1_83
• ISSN: 24241431
• ISSN: 13424327
• NDL BIB ID: 7224005
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7224005
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Allowed