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Related Experiment Video

Updated: Mar 31, 2026

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

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

Published on: November 20, 2017

Fish population persistence in hydrologically variable landscapes.

Nick R Bond, Stephen R Balcombe, David A Crook

Ecological Applications : a Publication of the Ecological Society of America

|October 15, 2015

Summary

This summary is machine-generated.

Forecasting fish population persistence is crucial for conservation. This study shows that human water extraction, not climate change, poses the greatest risk to golden perch (Macquaria ambigua) in arid regions.

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Last Updated: Mar 31, 2026

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

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Published on: November 20, 2017

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Published on: July 30, 2019

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

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Published on: November 13, 2017

Area of Science:

Ecology
Conservation Biology
Freshwater Ecology

Background:

Arid and semiarid aquatic ecosystems face threats from climate change and human water use.
Waterholes are vital refuges for aquatic biota, but are diminishing due to reduced runoff and extraction.
Golden perch (Macquaria ambigua) populations are vulnerable to habitat changes in the Murray-Darling Basin.

Purpose of the Study:

To model the population persistence of golden perch under various environmental scenarios.
To assess the impacts of increased aridity, drought frequency, and water extraction on golden perch viability.
To evaluate the effectiveness of a spatial population model for intermittent river systems.

Main Methods:

Developed a spatially explicit population model for golden perch.
Simulated scenarios of increased aridity, drought frequency, and water extraction.
Integrated spatial and temporal dynamics of waterhole persistence with demographic processes.

Main Results:

The model predicted golden perch persistence under current conditions.
Increased local water extraction significantly heightened the risk of population decline.
Increasing aridity and drought frequency had minor impacts on population viability.

Conclusions:

Spatial connectivity and population turnover are critical for persistence in dynamic river systems.
Human water extraction is a major driver of golden perch population decline.
The stochastic modeling framework effectively assesses population viability in intermittent rivers.