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Related Concept Videos

Optimal Foraging00:48

Optimal Foraging

How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
Types of Selection01:46

Types of Selection

Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...

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Related Experiment Video

Updated: May 18, 2026

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop
07:43

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

Published on: July 2, 2018

Harvest selection on Atlantic cod behavioral traits: implications for spatial management.

Esben Moland Olsen, Michelle R Heupel, Colin A Simpfendorfer

    Ecology and Evolution
    |September 8, 2012
    PubMed
    Summary
    This summary is machine-generated.

    Fisheries harvesting can alter Atlantic cod behavior, favoring less migratory fish. Understanding cod personality traits is crucial for effective fisheries management and marine reserve design.

    Keywords:
    Atlantic codbehaviorharvestingpersonality traitselectiontelemetry

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    Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
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    Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

    Published on: November 20, 2017

    Related Experiment Videos

    Last Updated: May 18, 2026

    Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop
    07:43

    Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

    Published on: July 2, 2018

    Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
    09:32

    Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools

    Published on: November 20, 2017

    Area of Science:

    • Marine biology
    • Evolutionary ecology
    • Fisheries science

    Background:

    • Harvesting wild populations can drive evolutionary changes in life-history and behavioral traits.
    • The impact of harvest selection on fish behavior remains understudied.
    • Atlantic cod (Gadus morhua) populations are subject to significant fishing pressure.

    Purpose of the Study:

    • To investigate the influence of fishing on Atlantic cod behavior in their natural habitat.
    • To determine if behavioral traits in cod are heritable or persistent, akin to personality.
    • To assess the implications of behavioral changes for fisheries management and conservation.

    Main Methods:

    • Acoustic telemetry using tags and receivers to monitor 60 individual Atlantic cod.
    • Tracking diel vertical migration patterns and habitat use in the Norwegian Skagerrak coast.
    • Analyzing the relationship between behavior, fish size, and fishery capture risk.

    Main Results:

    • Cod exhibiting strong diel vertical migration had a higher risk of fishery capture.
    • Larger cod (30-66 cm) displayed reduced diel vertical migration.
    • Individual cod behavior showed significant repeatability over time, suggesting personality traits.
    • Natural selection appeared to favor cod with larger activity spaces.

    Conclusions:

    • Fishing pressure can select for specific behavioral traits in Atlantic cod, potentially altering population dynamics.
    • The concept of 'personality' in fish behavior is supported by observed individual consistency.
    • An evolutionary approach incorporating fish behavior is essential for sustainable fisheries management, particularly for spatial strategies like marine reserves.