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Spawning strategies in cypriniform fishes in a lowland river invaded by non-indigenous European barbel Barbus barbus.

Gutmann Roberts, C. and Britton, J.R., 2020. Spawning strategies in cypriniform fishes in a lowland river invaded by non-indigenous European barbel Barbus barbus. Hydrobiologia. (In Press)

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DOI: 10.1007/s10750-020-04394-9

Abstract

© 2020, The Author(s). Spawning strategies of lowland river fishes include single spawning, where reproduction generally occurs in early spring to provide 0+ fish with an extended growth season through the summer, but with a high risk of stochastic mortality events occurring, such as early summer floods. This risk can be reduced by multiple or protracted spawning strategies, where 0+ fish are produced over an extended period, often into mid-summer, but with the trade-off being a shorter growth season. The spawning strategies of cypriniform fish were explored in the River Teme, a spate river in Western England, which has non-indigenous European barbel Barbus barbus present. Sampling 0+ fish in spring and summer and across three spawning periods, B. barbus, chub Squalius cephalus and minnow Phoxinus phoxinus always revealed multiple spawning events, with 0+ fish of < 20 mm present in samples collected from June to August. Fish below 20 mm in August remained relatively small by the end of their growth season (October). For dace Leuciscus leuciscus, only single spawning events were evident, but with 0+ dace always being relatively large. Therefore, multiple spawning appears to be a common strategy that provides resilience in 0+ fish against stochastic mortality events in lowland rivers.

Item Type:Article
ISSN:0018-8158
Group:Faculty of Science & Technology
ID Code:34548
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:15 Sep 2020 11:22
Last Modified:15 Sep 2020 11:22

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