Heatwave effects on the swimming behaviour of a Mediterranean freshwater fish, the Iberian barbel Luciobarbus bocagei.
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| Title: | Heatwave effects on the swimming behaviour of a Mediterranean freshwater fish, the Iberian barbel Luciobarbus bocagei. |
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| Authors: | Mameri, Daniel1 (AUTHOR) dmameri@isa.ulisboa.pt, Branco, Paulo1 (AUTHOR), Ferreira, Maria Teresa1 (AUTHOR), Santos, José Maria1 (AUTHOR) |
| Source: | Science of the Total Environment. Aug2020, Vol. 730, pN.PAG-N.PAG. 1p. |
| Abstract: | Heatwaves, which can be defined as increases of at least 5 °C in air temperature for more than five consecutive days for a specified reference period, are expected to become more frequent under the ongoing climate change, with freshwater organisms being particularly vulnerable to high temperature fluctuations. In Mediterranean-climate areas, depending on the extent of summer droughts and loss of longitudinal connectivity, river segments may become isolated, maintaining fish populations confined to a series of disconnected pools, with no possibility to move to thermal refugia and thus becoming more prone to thermal stress. In this study, we evaluated the effect of a simulated heatwave on the swimming behaviour of juvenile stages of a potamodromous native cyprinid fish, the Iberian barbel Luciobarbus bocagei , under experimental mesocosm conditions. Behavioural traits included fish activity, boldness and shoal cohesion and were continuously measured at a constant flow velocity of 18 cm s−1, which is typical of riffle habitats. Overall, results show that the behaviour of juvenile Iberian barbel is likely to be affected by heatwaves, with fish displaying lower activity and boldness, while no clear difference was observed in shoal cohesion. This study highlights the importance of managing thermal refugia that are crucial for fish to persist in intermittent rivers. Future studies should focus on the interaction of heatwaves with other stressors, such as oxygen depletion, for a broader understanding of the perturbation affecting freshwater fishes under a changing climate. Unlabelled Image • Heatwaves and river intermittence combined are expected to impact freshwater fishes. • Fish swimming behaviour response to heatwaves was evaluated in a mesocosm facility. • Behavioural traits (activity, boldness, shoal cohesion) were monitored every 3 min. • Fish previously exposed to heatwaves displayed lower activity and boldness. • River restoration measures should also focus on the management of thermal refugia. [ABSTRACT FROM AUTHOR] |
| Copyright of Science of the Total Environment is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 143462107 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Heatwave effects on the swimming behaviour of a Mediterranean freshwater fish, the Iberian barbel Luciobarbus bocagei. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Mameri%2C+Daniel%22">Mameri, Daniel</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dmameri@isa.ulisboa.pt</i><br /><searchLink fieldCode="AR" term="%22Branco%2C+Paulo%22">Branco, Paulo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ferreira%2C+Maria+Teresa%22">Ferreira, Maria Teresa</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Santos%2C+José+Maria%22">Santos, José Maria</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Science+of+the+Total+Environment%22">Science of the Total Environment</searchLink>. Aug2020, Vol. 730, pN.PAG-N.PAG. 1p. – Name: Abstract Label: Abstract Group: Ab Data: Heatwaves, which can be defined as increases of at least 5 °C in air temperature for more than five consecutive days for a specified reference period, are expected to become more frequent under the ongoing climate change, with freshwater organisms being particularly vulnerable to high temperature fluctuations. In Mediterranean-climate areas, depending on the extent of summer droughts and loss of longitudinal connectivity, river segments may become isolated, maintaining fish populations confined to a series of disconnected pools, with no possibility to move to thermal refugia and thus becoming more prone to thermal stress. In this study, we evaluated the effect of a simulated heatwave on the swimming behaviour of juvenile stages of a potamodromous native cyprinid fish, the Iberian barbel Luciobarbus bocagei , under experimental mesocosm conditions. Behavioural traits included fish activity, boldness and shoal cohesion and were continuously measured at a constant flow velocity of 18 cm s−1, which is typical of riffle habitats. Overall, results show that the behaviour of juvenile Iberian barbel is likely to be affected by heatwaves, with fish displaying lower activity and boldness, while no clear difference was observed in shoal cohesion. This study highlights the importance of managing thermal refugia that are crucial for fish to persist in intermittent rivers. Future studies should focus on the interaction of heatwaves with other stressors, such as oxygen depletion, for a broader understanding of the perturbation affecting freshwater fishes under a changing climate. Unlabelled Image • Heatwaves and river intermittence combined are expected to impact freshwater fishes. • Fish swimming behaviour response to heatwaves was evaluated in a mesocosm facility. • Behavioural traits (activity, boldness, shoal cohesion) were monitored every 3 min. • Fish previously exposed to heatwaves displayed lower activity and boldness. • River restoration measures should also focus on the management of thermal refugia. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Science of the Total Environment is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.scitotenv.2020.139152 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Titles: – TitleFull: Heatwave effects on the swimming behaviour of a Mediterranean freshwater fish, the Iberian barbel Luciobarbus bocagei. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Mameri, Daniel – PersonEntity: Name: NameFull: Branco, Paulo – PersonEntity: Name: NameFull: Ferreira, Maria Teresa – PersonEntity: Name: NameFull: Santos, José Maria IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 08 Text: Aug2020 Type: published Y: 2020 Identifiers: – Type: issn-print Value: 00489697 Numbering: – Type: volume Value: 730 Titles: – TitleFull: Science of the Total Environment Type: main |
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