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Open AccessArticle

Variability in Population Traits of a Sentinel Iberian Fish in a Highly Modified Mediterranean-Type River

1
Departamento de Zoología y Antropología Física, Facultad de Biología, Campus de Espinardo, Universidad de Murcia, 30100 Murcia, Spain
2
Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset BH12 5BB, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Heiko L. Schoenfuss
Water 2021, 13(6), 747; https://doi.org/10.3390/w13060747
Received: 9 February 2021 / Revised: 2 March 2021 / Accepted: 3 March 2021 / Published: 10 March 2021
(This article belongs to the Special Issue Ecology and Conservation of Freshwater Fishes Biodiversity)
Human pressures on water resources have been suggested as a driver of biological traits that induce changes in native fish populations. This study highlighted the interplay between environmental stress factors, mostly related to flow regulation, and the longitudinal river gradient in biological traits such as the growth, size structure and somatic condition of a sentinel fish, Luciobarbus sclateri. We found an increase in size-related metrics and somatic condition at population levels associated with downstream reaches, although fragmentation and habitat alteration, flow regime alteration and the abundance of non-native fish were also significantly involved in their variability. Age-related parameters and growth were only explained by flow regime alterations and the abundance of non-native fish species. The high plasticity observed in L. sclateri population traits suggests that this is a key factor in the species adaptability to resist in a strongly altered Mediterranean river basin. However, the interplay of multiple stressors plays an important role in fish population dynamics and could induce complex responses that may be essential for long-term monitoring in sentinel species. View Full-Text
Keywords: sentinel species; longitudinal gradient; human impacts; flow regime alteration; non-native fish; fragmentation; habitat alteration; Mediterranean rivers; Segura River basin sentinel species; longitudinal gradient; human impacts; flow regime alteration; non-native fish; fragmentation; habitat alteration; Mediterranean rivers; Segura River basin
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MDPI and ACS Style

Sánchez-Pérez, A.; Oliva-Paterna, F.J.; Amat-Trigo, F.; Torralva, M. Variability in Population Traits of a Sentinel Iberian Fish in a Highly Modified Mediterranean-Type River. Water 2021, 13, 747. https://doi.org/10.3390/w13060747

AMA Style

Sánchez-Pérez A, Oliva-Paterna FJ, Amat-Trigo F, Torralva M. Variability in Population Traits of a Sentinel Iberian Fish in a Highly Modified Mediterranean-Type River. Water. 2021; 13(6):747. https://doi.org/10.3390/w13060747

Chicago/Turabian Style

Sánchez-Pérez, Ana; Oliva-Paterna, Francisco J.; Amat-Trigo, Fátima; Torralva, Mar. 2021. "Variability in Population Traits of a Sentinel Iberian Fish in a Highly Modified Mediterranean-Type River" Water 13, no. 6: 747. https://doi.org/10.3390/w13060747

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