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Investigating Strategies to Improve ...

Galloway, Olivia May,

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Investigating Strategies to Improve Captive Rearing and Reintroduction Programs for Lake Sturgeon Acipenser fulvescens in the Great Lakes /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Investigating Strategies to Improve Captive Rearing and Reintroduction Programs for Lake Sturgeon Acipenser fulvescens in the Great Lakes // Olivia May Galloway.
Author:	Galloway, Olivia May,
Description:	1 electronic resource (145 pages)
Notes:	Source: Masters Abstracts International, Volume: 86-11.
Contained By:	Masters Abstracts International86-11.
Subject:	Biology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=32041217
ISBN:	9798315754251

Investigating Strategies to Improve Captive Rearing and Reintroduction Programs for Lake Sturgeon Acipenser fulvescens in the Great Lakes /
Galloway, Olivia May,

Investigating Strategies to Improve Captive Rearing and Reintroduction Programs for Lake Sturgeon Acipenser fulvescens in the Great Lakes /Olivia May Galloway. - 1 electronic resource (145 pages)

Source: Masters Abstracts International, Volume: 86-11.

One quarter of the world's freshwater fauna is at risk of extinction, and freshwater fishes face the widest variety of threats. Conservation reintroduction programs involving captive rearing and release are a promising approach to restore declining populations of imperilled fishes. However, these efforts often fail to produce self-sustaining populations, partly due to a phenotypic mismatch between captive fish and the natural environment, inhibiting post-release survival and success. My thesis tests hypotheses regarding the use of 1) physical enrichment and 2) soft release strategies prior to reintroduction to minimize the phenotypic mismatch in captive-reared Lake Sturgeon Acipenser fulvescens, an imperilled species with established reintroduction programs. I first assessed the physiological effects of adding enrichment (i.e., substrate and structures) to the rearing environment of juvenile Lake Sturgeon. I found that enrichment influenced survivorship, growth, body condition and metabolic rate, but not dorsal colour pattern, CTmax or cortisol. Structures alone had the most positive effect on sturgeon physiology. I then tested whether a post-transport acclimation period (i.e., soft release) could mitigate transport stress more effectively than a traditional immediate release (i.e., hard release). I found that transport significantly influenced the stress physiology (i.e., cortisol, lactate and metabolic rate) and behaviour of juvenile Lake Sturgeon. At the time of release, hard-released fish exhibited a higher metabolic rate and lactate levels than soft-released fish, which appeared to recover from transport stress within 24 hours. My thesis demonstrates the physiological benefits of both physical enrichment and soft release strategies, highlighting their potential to minimize the phenotypic mismatch in captive fish and support their transition to the natural environment upon reintroduction. These data will inform improvements to reintroduction programs for imperilled fishes and advance the fields of reintroduction biology and conservation physiology.

English

ISBN: 9798315754251Subjects--Topical Terms:

522710
Biology.
Subjects--Index Terms:

Lake Sturgeon

Investigating Strategies to Improve Captive Rearing and Reintroduction Programs for Lake Sturgeon Acipenser fulvescens in the Great Lakes /
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520 $a One quarter of the world's freshwater fauna is at risk of extinction, and freshwater fishes face the widest variety of threats. Conservation reintroduction programs involving captive rearing and release are a promising approach to restore declining populations of imperilled fishes. However, these efforts often fail to produce self-sustaining populations, partly due to a phenotypic mismatch between captive fish and the natural environment, inhibiting post-release survival and success. My thesis tests hypotheses regarding the use of 1) physical enrichment and 2) soft release strategies prior to reintroduction to minimize the phenotypic mismatch in captive-reared Lake Sturgeon Acipenser fulvescens, an imperilled species with established reintroduction programs. I first assessed the physiological effects of adding enrichment (i.e., substrate and structures) to the rearing environment of juvenile Lake Sturgeon. I found that enrichment influenced survivorship, growth, body condition and metabolic rate, but not dorsal colour pattern, CTmax or cortisol. Structures alone had the most positive effect on sturgeon physiology. I then tested whether a post-transport acclimation period (i.e., soft release) could mitigate transport stress more effectively than a traditional immediate release (i.e., hard release). I found that transport significantly influenced the stress physiology (i.e., cortisol, lactate and metabolic rate) and behaviour of juvenile Lake Sturgeon. At the time of release, hard-released fish exhibited a higher metabolic rate and lactate levels than soft-released fish, which appeared to recover from transport stress within 24 hours. My thesis demonstrates the physiological benefits of both physical enrichment and soft release strategies, highlighting their potential to minimize the phenotypic mismatch in captive fish and support their transition to the natural environment upon reintroduction. These data will inform improvements to reintroduction programs for imperilled fishes and advance the fields of reintroduction biology and conservation physiology.
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650 4 $a Wildlife conservation. $2 fast $3 542165
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