The influence of flow velocity on the response of rheophilic fish to visual cues
The influence of flow velocity on the response of rheophilic fish to visual cues
The strong association with visual cues exhibited by fish that prefer to inhabit flowing water (rheophilic species) may help reduce the energetic costs of maintaining position due to the provision of spatial points of reference. If this “Station Holding Hypothesis” is true, a positive relationship between the association with visual cues and flow velocity is expected. This hypothesis was tested experimentally by quantifying the response of common minnow (Phoxinus phoxinus) and brown trout (Salmo trutta) to visual cues under three flow velocities. In contradiction to the prediction, there was no evidence that the association with strong visual cues was positively related to flow velocity when fish were presented with vertical black stripes in an open channel flume, although interspecific variation in response was observed. The association with visual cues was relatively weak in trout, compared to minnow that spent 660% more time associated with the zone in which visual cues were present during the treatment, than the control when visual cues were absent. Trout tended to be more exploratory and made short visits to the area where visual cues were present, whereas minnow associated with the cues for longer. The strong association with visual cues independent of flow velocity exhibited by minnow and the weak association across all velocities by trout suggest that this behaviour is unlikely to reflect a strategy to minimise the energetic cost of maintaining position in flowing water. Minnow may have used the visual cues as a proxy indicator of physical structure that provides alternative benefits, such as refuge from predators. Trout may have employed alternative cues (e.g. mechanosensory) to seek more energetically favourable regions of the experimental area, reducing the importance of stationary visual stimuli.
Minnow, Trout, rheotaxis, stimulus, swimming performance
Miles, James
993242b0-5784-4d76-825a-b757dffd9ac1
Vowles, Andrew S.
c35c3a75-2199-4665-8340-e8ee7abc25f4
Kemp, Paul S.
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
13 March 2023
Miles, James
993242b0-5784-4d76-825a-b757dffd9ac1
Vowles, Andrew S.
c35c3a75-2199-4665-8340-e8ee7abc25f4
Kemp, Paul S.
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
Miles, James, Vowles, Andrew S. and Kemp, Paul S.
(2023)
The influence of flow velocity on the response of rheophilic fish to visual cues.
PLoS ONE, 18 (3), [e0281741].
Abstract
The strong association with visual cues exhibited by fish that prefer to inhabit flowing water (rheophilic species) may help reduce the energetic costs of maintaining position due to the provision of spatial points of reference. If this “Station Holding Hypothesis” is true, a positive relationship between the association with visual cues and flow velocity is expected. This hypothesis was tested experimentally by quantifying the response of common minnow (Phoxinus phoxinus) and brown trout (Salmo trutta) to visual cues under three flow velocities. In contradiction to the prediction, there was no evidence that the association with strong visual cues was positively related to flow velocity when fish were presented with vertical black stripes in an open channel flume, although interspecific variation in response was observed. The association with visual cues was relatively weak in trout, compared to minnow that spent 660% more time associated with the zone in which visual cues were present during the treatment, than the control when visual cues were absent. Trout tended to be more exploratory and made short visits to the area where visual cues were present, whereas minnow associated with the cues for longer. The strong association with visual cues independent of flow velocity exhibited by minnow and the weak association across all velocities by trout suggest that this behaviour is unlikely to reflect a strategy to minimise the energetic cost of maintaining position in flowing water. Minnow may have used the visual cues as a proxy indicator of physical structure that provides alternative benefits, such as refuge from predators. Trout may have employed alternative cues (e.g. mechanosensory) to seek more energetically favourable regions of the experimental area, reducing the importance of stationary visual stimuli.
Text
Miles et al. 2023_Accepted_Manuscript
- Accepted Manuscript
Text
journal.pone.0281741
- Version of Record
More information
Accepted/In Press date: 30 January 2023
Published date: 13 March 2023
Additional Information:
Funding: This work was supported by the Natural Environment Research Council (NERC) as part of a NERC studentship [JM; grant number 1786331]. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Keywords:
Minnow, Trout, rheotaxis, stimulus, swimming performance
Identifiers
Local EPrints ID: 483356
URI: http://eprints.soton.ac.uk/id/eprint/483356
ISSN: 1932-6203
PURE UUID: 78877fee-ca4d-458b-9dd8-d1253607de61
Catalogue record
Date deposited: 30 Oct 2023 08:07
Last modified: 17 Mar 2024 03:19
Export record
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
