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Fish under pressure: Examining behavioural responses of Iberian barbel under simulated hydropeaking with instream structures

Costa, M J ; Fuentes-Pérez, J F ; Boavida, I ; Tuhtan, J A ; Pinheiro, A N Higgs, Dennis M.

PloS one, 2019-01, Vol.14 (1), p.e0211115-e0211115 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
Fish under pressure: Examining behavioural responses of Iberian barbel under simulated hydropeaking with instream structures
Autor: Costa, M J ; Fuentes-Pérez, J F ; Boavida, I ; Tuhtan, J A ; Pinheiro, A N
Higgs, Dennis M.
Assuntos: Animals ; Behavior, Animal ; Biology and Life Sciences ; Civil engineering ; Cyprinidae - physiology ; Earth Sciences ; Ecology and Environmental Sciences ; Electric power demand ; Electricity ; Electricity (Physics) ; Electricity consumption ; Engineering research ; Fish ; Freshwater fish ; Habitats ; Hydroelectric plants ; Hydroelectric power ; Hydrostatic Pressure ; Kinematics ; Lactic acid ; Lateral line ; Mechanoreceptors ; Medicine and Health Sciences ; Mitigation ; Physical Sciences ; Physiological responses ; Physiology ; Potential flow ; Pressure ; Pressure distribution ; Pyramids ; River ecology ; Salmonids ; Social Sciences ; Stress concentration ; Sustainability ; Swimming ; Trout ; Water flow ; Water-power
É parte de: PloS one, 2019-01, Vol.14 (1), p.e0211115-e0211115
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Competing Interests: The authors have declared that no competing interests exist.
Descrição: Hydropeaking is the rapid change in the water flow downstream of a hydropower plant, driven by changes in daily electricity demand. These fluctuations may produce negative effects in freshwater fish. To minimize these impacts, previous studies have proposed habitat enhancement structures as potential mitigation measures for salmonids. However, the recommendation of these mitigation measures for cyprinids remains scarce and their effects unknown. In this study, the effects of potential habitat mitigation structures under simulated hydropeaking and base-flow conditions are examined for Iberian barbel (Luciobarbus bocagei) in an indoor flume. Solid triangular pyramids and v-shaped structures were evaluated as potential flow-refuging areas and compared with a configuration without structures. A novel, interdisciplinary approach is applied to investigate individual and group responses to rapidly changing flows, by assessing physiological (glucose and lactate), movement behaviour (structure use, sprints and drifts) and the pressure distribution using a fish-inspired artificial lateral line flow sensor. The major findings of this study are four-fold: 1) Under hydropeaking conditions, the v-shaped structures triggered a lactate response and stimulated individual structure use, whereas solid structures did not elicit physiological adjustments and favoured individual and group structure use. Overall, both solid structures and their absence stimulated sprints and drifts. 2) The hydrodynamic conditions created in hydropeaking did not always reflect increased physiological responses or swimming activity. 3) Each event-structure combination resulted in unique hydrodynamic conditions which were reflected in the different fish responses. 4) The most relevant flow variable measured was the pressure asymmetry, which is caused by the vortex size and shedding frequency of the structures. Considering the non-uniform nature of hydropeaking events, and the observation that the fish responded differently to specific flow event-structure combinations, a diverse set of instream structures should be considered for habitat-based hydropeaking mitigation measures for Iberian barbel.
Editor: United States: Public Library of Science
Idioma: Inglês

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Fish under pressure: Examining behavioural responses of Iberian barbel under simulated hydropeaking with instream structures

Costa, M J ; Fuentes-Pérez, J F ; Boavida, I ; Tuhtan, J A ; Pinheiro, A N Higgs, Dennis M.

United States: Public Library of Science

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