Reproductive Behavior, Captive Breeding, and Restoration Ecology of Endangered Fishes

Species recovery efforts generally focus on in situ actions such as habitat protection. However, captive breeding can also provide critical life history information, as well as helping supplement existing or restoring extirpated populations. We have successfully propagated nine species in captivity,...

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Veröffentlicht in:Environmental biology of fishes 1999-06, Vol.55 (1-2), p.31-42
Hauptverfasser: Rakes, Patrick L, Shute, John R, Shute, Peggy W
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container_title Environmental biology of fishes
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creator Rakes, Patrick L
Shute, John R
Shute, Peggy W
description Species recovery efforts generally focus on in situ actions such as habitat protection. However, captive breeding can also provide critical life history information, as well as helping supplement existing or restoring extirpated populations. We have successfully propagated nine species in captivity, including blackside dace, spotfin chubs, bloodfin darters, and boulder darters. Threatened blackside dace, Phoxinus cumberlandensis, were induced to spawn in laboratory aquaria by exposing them to milt from a reproductively mature male stoneroller, Campostoma anomalum or river chub, Nocomis micropogon. The latter are nest-building minnows, with which Phoxinus may spawn in nature. Eggs are broadcast among gravel and pebbles. Blackside dace individuals reared in captivity were used for translocation. Threatened spotfin chubs, Cyprinella monacha, fractional crevice spawners, deposited eggs in laboratory aquaria in the spaces created between stacks of ceramic tiles. Captively produced spotfin chubs were used as part of a larger stream restoration and fish reintroduction project in the Great Smoky Mountains National Park. The bloodfin darter, Etheostoma sanguifluum, was first used as a surrogate to develop techniques for spawning a closely related species, the endangered boulder darter, E. wapiti. Both darter species mated in a wedge created between two ceramic tiles. Our efforts have had variable but generally high success, with survival rates of 50-90% of eggs deposited. Captive production of nongame fishes can aid recovery of rare species or populations, aid in watershed restoration, and can help to refine water quality standards. In addition, captive breeding allows discovery of important behavioral or life history characteristics that may constrain reproduction of rare species in altered natural habitats.
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identifier ISSN: 0378-1909
ispartof Environmental biology of fishes, 1999-06, Vol.55 (1-2), p.31-42
issn 0378-1909
1573-5133
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source SpringerNature Journals
subjects Aquariums
Behavior
Campostoma anomalum
Cyprinella monacha
Eggs
Endangered & extinct species
Endangered species
Environmental restoration
Etheostoma
Etheostoma sanguifluum
Freshwater
Gravel
Life history
Mountains
National parks
Nocomis micropogon
Phoxinus
Phoxinus cumberlandensis
Pisces
Rare species
Reintroduction
Spawning
Survival
Tiles
Translocation
Water quality standards
title Reproductive Behavior, Captive Breeding, and Restoration Ecology of Endangered Fishes
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