First evidence of spawning migration by goldfish (Carassius auratus); implications for control of a globally invasive species

Beatty, Stephen J., Allen, Mark G., Whitty, Jeff M., Lymbery, Alan J., Keleher, James J., Tweedley, James R., Ebner, Brendan C., and Morgan, David L. (2017) First evidence of spawning migration by goldfish (Carassius auratus); implications for control of a globally invasive species. Ecology of Freshwater Fish, 26. pp. 444-455.

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Goldfish (Carassius auratus) was one of the first fishes to be domesticated and has been widely introduced across the globe, but is now considered one of the world's worst invasive aquatic species. Surprisingly, there is a dearth of information on its spatial and temporal movement patterns, which hampers the development of effective control programmes. We examined the movement patterns of an introduced population of C. auratus in a south-western Australian river using passive acoustic telemetry. The study population had a high residency index within the array (i.e. proportion of all days at liberty that, on average, each fish was detected by a receiver) with fish being detected on 64% of days. The individuals were also reasonably mobile, travelling a mean of 0.30 km (linear river kilometres).day-1 within the array, and one fish moved 231.3 km over the 365-day study period (including 5.4 km in a 24 hr period). Importantly, C. auratus displayed significant seasonal movement patterns including a clear shift in habitats during its breeding period with most mature individuals being detected in an off-channel wetland during that time. The results of this study strongly suggest that C. auratus undertook a spawning migration into a lentic habitat. These results have important implications for developing control programmes for the species, such as targeting connections to off-channel lentic systems during its breeding period.

Item ID: 50939
Item Type: Article (Research - C1)
ISSN: 1600-0633
Keywords: freshwater fish, alien species, fish migration, acoustic telemetry, Cyprinidae
Funders: Caring for our Country programme, GeoCatch
Date Deposited: 11 Oct 2017 04:12
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310304 Freshwater ecology @ 50%
41 ENVIRONMENTAL SCIENCES > 4102 Ecological applications > 410202 Biosecurity science and invasive species ecology @ 50%
SEO Codes: 96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960406 Control of Pests, Diseases and Exotic Species in Fresh, Ground and Surface Water Environments @ 100%
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