Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex)
Understanding individual movement patterns in stream-resident salmonids is critical for conservation and river management, particularly in Mediterranean streams characterized by high environmental variability. We tagged 997 Mediterranean brown trout (<i>Salmo trutta</i> complex) and cond...
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MDPI AG
2025-06-01
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| Series: | Fishes |
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| Online Access: | https://www.mdpi.com/2410-3888/10/7/308 |
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| author | Enric Aparicio Rafel Rocaspana Antoni Palau-Ibars Neus Oromí Dolors Vinyoles Carles Alcaraz |
| author_facet | Enric Aparicio Rafel Rocaspana Antoni Palau-Ibars Neus Oromí Dolors Vinyoles Carles Alcaraz |
| author_sort | Enric Aparicio |
| collection | DOAJ |
| description | Understanding individual movement patterns in stream-resident salmonids is critical for conservation and river management, particularly in Mediterranean streams characterized by high environmental variability. We tagged 997 Mediterranean brown trout (<i>Salmo trutta</i> complex) and conducted an 11-month mark–recapture study using Passive Integrated Transponder (PIT) technology to assess movement behavior in the Flamisell River (Ebro Basin, northeastern Iberian Peninsula). Movements followed a leptokurtic distribution, with 81.8% of the individuals classified as sedentary (median movement = 24.9 m) and 18.2% as mobile (median movement = 376.2 m). Generalized linear models revealed distinct drivers of fish movement for each group. In sedentary trout, movement was mainly influenced by mesohabitat type, season, sex, and body size, with males and larger individuals moving farther. In mobile trout, mesohabitat type, density, and body size were key predictors. Movement patterns were repeatable over time, indicating consistent behavioral tendencies. These results support a bimodal movement strategy and highlight the importance of individual variation. Conservation planning should account for both sedentary and mobile groups to preserve functional and genetic connectivity and improve resilience of Mediterranean streams. |
| format | Article |
| id | doaj-art-e0a594fc7ca442e79f6af147b5b8e4d9 |
| institution | DOAJ |
| issn | 2410-3888 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fishes |
| spelling | doaj-art-e0a594fc7ca442e79f6af147b5b8e4d92025-08-20T03:08:05ZengMDPI AGFishes2410-38882025-06-0110730810.3390/fishes10070308Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex)Enric Aparicio0Rafel Rocaspana1Antoni Palau-Ibars2Neus Oromí3Dolors Vinyoles4Carles Alcaraz5GRECO, Institute of Aquatic Ecology, University of Girona, E-17071 Girona, Catalonia, SpainGesna Estudis Ambientals, S.L., E-25240 Linyola, Catalonia, SpainDepartment of Chemistry, Physics, Environment and Soil Sciences, University of Lleida, E-25003 Lleida, Catalonia, SpainDepartment of Animal Science, ETSEA, University of Lleida, E-25003 Lleida, Catalonia, SpainDepartment of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, E-08028 Barcelona, Catalonia, SpainIRTA, Marine and Continental Waters, Carretera Poble Nou Km 5.5, E-43540 La Ràpita, Catalonia, SpainUnderstanding individual movement patterns in stream-resident salmonids is critical for conservation and river management, particularly in Mediterranean streams characterized by high environmental variability. We tagged 997 Mediterranean brown trout (<i>Salmo trutta</i> complex) and conducted an 11-month mark–recapture study using Passive Integrated Transponder (PIT) technology to assess movement behavior in the Flamisell River (Ebro Basin, northeastern Iberian Peninsula). Movements followed a leptokurtic distribution, with 81.8% of the individuals classified as sedentary (median movement = 24.9 m) and 18.2% as mobile (median movement = 376.2 m). Generalized linear models revealed distinct drivers of fish movement for each group. In sedentary trout, movement was mainly influenced by mesohabitat type, season, sex, and body size, with males and larger individuals moving farther. In mobile trout, mesohabitat type, density, and body size were key predictors. Movement patterns were repeatable over time, indicating consistent behavioral tendencies. These results support a bimodal movement strategy and highlight the importance of individual variation. Conservation planning should account for both sedentary and mobile groups to preserve functional and genetic connectivity and improve resilience of Mediterranean streams.https://www.mdpi.com/2410-3888/10/7/308movement ecologyPIT telemetrysedentary vs. mobile strategymesohabitat influencerepeatability of behavior |
| spellingShingle | Enric Aparicio Rafel Rocaspana Antoni Palau-Ibars Neus Oromí Dolors Vinyoles Carles Alcaraz Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex) Fishes movement ecology PIT telemetry sedentary vs. mobile strategy mesohabitat influence repeatability of behavior |
| title | Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex) |
| title_full | Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex) |
| title_fullStr | Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex) |
| title_full_unstemmed | Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex) |
| title_short | Individual Variation in Movement Behavior of Stream-Resident Mediterranean Brown Trout (<i>Salmo trutta</i> Complex) |
| title_sort | individual variation in movement behavior of stream resident mediterranean brown trout i salmo trutta i complex |
| topic | movement ecology PIT telemetry sedentary vs. mobile strategy mesohabitat influence repeatability of behavior |
| url | https://www.mdpi.com/2410-3888/10/7/308 |
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