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Osmoregulation in Fishes

When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
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Related Experiment Video

Updated: May 18, 2026

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

Job Satisfaction in Fisheries Compared.

Richard Pollnac1, Maarten Bavinck, Iris Monnereau

  • 1University of Rhode Island, Kingston, RI USA.

Social Indicators Research
|September 22, 2012
PubMed
Summary

Fishers satisfied with their jobs, meeting basic, social, and self-actualization needs, are less likely to leave marine capture fishing. Younger fishers with less experience and smaller households are more inclined to seek other occupations.

Area of Science:

  • Fisheries Science
  • Marine Biology
  • Sociology

Background:

  • Job satisfaction is crucial for sustainable fisheries management.
  • Small-scale and semi-industrial fishing sectors face unique challenges.
  • Understanding fisher motivations is key to effective policy.

Purpose of the Study:

  • To comparatively analyze job satisfaction in marine capture fisheries across diverse global regions.
  • To identify factors influencing fishers' decisions to remain in or leave the occupation.
  • To provide insights for fisheries managers regarding fisher retention and transition.

Main Methods:

  • Utilized an identical job satisfaction assessment tool across seven studies.
  • Covered nine countries in Asia, Africa, and the Caribbean.

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07:29

A Standardized Protocol for Preference Testing to Assess Fish Welfare

Published on: February 22, 2020

  • Employed multidimensional plots and cluster analyses to identify regional variations.
  • Main Results:

    • Statistically significant geographical variations in job satisfaction were observed.
    • Three distinct clusters of fishing communities were identified: Southeast Asian, Caribbean, and Afro-Indian.
    • Fishers satisfied with basic, social, and self-actualization needs were more likely to stay in fishing.

    Conclusions:

    • Job satisfaction is strongly linked to a fisher's willingness to continue in the occupation.
    • Younger fishers with less experience and smaller households are more prone to seeking alternative livelihoods.
    • Findings offer critical data for fisheries managers aiming to facilitate fisher transitions.