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143053 - Eradication of the invasive common carp, Cyprinus carpio.pdf (2.15 MB)

Eradication of the invasive common carp, Cyprinus carpio from a large lake: lessons and insights from the Tasmanian experience

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posted on 2023-05-20, 21:25 authored by Yick, JL, Wisniewski, C, Diggle, J, Jawahar PATILJawahar PATIL
Common carp (Cyprinus carpio, L. 1758) are the most abundant pest fish species in Australia, detrimental to ecosystem integrity and values, and in need of suitable management solutions. In January 1995, this destructive pest was discovered in two large, connected Tasmanian lakes—Lakes Crescent (23 km2) and Sorell (54 km2). After an initial assessment, carp were immediately contained to these waters using screens to prevent their escape down-stream, followed by swift legislation to enforce closure of the lakes to the public. Assessment and evaluation of carp numbers occurred throughout the eradication program, with effort focused on Lake Crescent. Beginning with undirected removal, techniques progressively evolved to more sophisticated targeted removal with assistance from biotelemetry, in conjunction with gill netting and electro-fishing. Real-time population estimates and in situ observations resulted in a detailed cumulative understanding of carp population dynamics, behaviour and seasonal habitat choice. This allowed strategic deployment of fences to block access to marshes, and the installation of steel traps within the fences. These gears specifically prevented spawning opportunities, while concurrently capturing mature fish. Following 12 years of adaptive and integrated effort, 7797 carp (fry, juvenile and adult) were captured from Lake Crescent, with the last carp being caught in December 2007. The subsequent 14 years of monitoring has not resulted in the capture of any carp, confirming the successful eradication of carp from Lake Crescent. These management practices have been successfully replicated in the larger Lake Sorell, where 41,499 carp (fry, juvenile and adult) have been removed. It is now estimated that there are few, if any carp remaining. Collectively, the techniques and strategies described here were reliable, and can be applied as a model to control or eradicate pest populations of carp in freshwater lakes elsewhere.

Funding

Australian Academy of Science

History

Publication title

Fishes

Volume

6

Article number

6

Number

6

Pagination

1-17

ISSN

2410-3888

Department/School

Institute for Marine and Antarctic Studies

Publisher

MDPIAG

Place of publication

Switzerland

Rights statement

Copyright 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

Repository Status

  • Open

Socio-economic Objectives

Control of pests, diseases and exotic species in coastal and estuarine environments; Control of pests, diseases and exotic species in fresh, ground and surface water

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