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Flink, H., Berge, A., Leggieri, F., Kolm, N. & Tibblin, P. (2025). Transient cognitive impacts of oxygen deprivation caused by catch-and-release angling. Biology Letters, 21(1), Article ID 20240527.
Open this publication in new window or tab >>Transient cognitive impacts of oxygen deprivation caused by catch-and-release angling
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2025 (English)In: Biology Letters, ISSN 1744-9561, E-ISSN 1744-957X, Vol. 21, no 1, article id 20240527Article in journal (Refereed) Published
Abstract [en]

Vertebrate brain function is particularly sensitive to the effects of hypoxia, with even brief periods of oxygen deprivation causing significant brain damage and impaired cognitive abilities. This study is the first to investigate the cognitive consequences of hypoxia in fish, specifically induced by exhaustive exercise and air exposure, conditions commonly encountered during catch-and-release (C&R) practices in recreational fishing. Angling exerts substantial pressure on inland fish populations, underscoring the need for sustainable practices like C&R. While C&R survival rates are generally high, understanding its sublethal impacts is crucial for evaluating the practice’s ethical and ecological sustainability. We examined the effects of these stressors on the cognitive function of 238 rainbow trout, using the free movement pattern Y-maze method to assess working memory through navigational search patterns during free exploration sessions. Our results showed that air exposure led to short-term (3–4 h post-treatment), but transient impairments in working memory, with no long-term cognitive deficits observed at one week and one month post-treatment. These findings emphasize the high tolerance of fish to hypoxia and support the sustainability of C&R as a tool in fisheries management.

Place, publisher, year, edition, pages
Royal Society, 2025
Keywords
brain function, working memory, recreational fishing, hypoxia, y-maze, rainbow trout
National Category
Zoology Ecology Behavioral Sciences Biology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-134583 (URN)10.1098/rsbl.2024.0527 (DOI)001397278000003 ()2-s2.0-85215688850 (Scopus ID)
Funder
The Crafoord Foundation, Dnr 20210648Swedish Research Council Formas, Dnr 2018-00605
Available from: 2025-01-16 Created: 2025-01-16 Last updated: 2025-02-06Bibliographically approved
Berggren, H., Yildirim, Y., Nordahl, O., Larsson, P., Dopson, M., Tibblin, P., . . . Forsman, A. (2024). Ecological filtering drives rapid spatiotemporal dynamics in fish skin microbiomes. Molecular Ecology, 33(18), Article ID e17496.
Open this publication in new window or tab >>Ecological filtering drives rapid spatiotemporal dynamics in fish skin microbiomes
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2024 (English)In: Molecular Ecology, ISSN 0962-1083, E-ISSN 1365-294X, Vol. 33, no 18, article id e17496Article in journal (Refereed) Published
Abstract [en]

Skin microbiomes provide vital functions, yet knowledge about the drivers and processes structuring their species assemblages is limited-especially for non-model organisms. In this study, fish skin microbiome was assessed by high throughput sequencing of amplicon sequence variants from metabarcoding of V3-V4 regions in the 16S rRNA gene on fish hosts subjected to the following experimental manipulations: (i) translocation between fresh and brackish water habitats to investigate the role of environment; (ii) treatment with an antibacterial disinfectant to reboot the microbiome and investigate community assembly and priority effects; and (iii) maintained alone or in pairs to study the role of social environment and inter-host dispersal of microbes. The results revealed that fish skin microbiomes harbour a highly dynamic microbial composition that was distinct from bacterioplankton communities in the ambient water. Microbiome composition first diverged as an effect of translocation to either the brackish or freshwater habitat. When the freshwater individuals were translocated back to brackish water, their microbiome composition converged towards the fish microbiomes in the brackish habitat. In summary, external environmental conditions and individual-specific factors jointly determined the community composition dynamics, whereas inter-host dispersal had negligible effects. The dynamics of the microbiome composition was seemingly non-affected by reboot treatment, pointing towards high resilience to disturbance. The results emphasised the role of inter-individual variability for the unexplained variation found in many host-microbiome systems, although the mechanistic underpinnings remain to be identified.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024
Keywords
16S rRNA amplicons, aquatic, ecology, environmental translocation, skin microbiota, teleost
National Category
Microbiology Ecology
Research subject
Ecology, Microbiology; Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-132473 (URN)10.1111/mec.17496 (DOI)001293450500001 ()39161196 (PubMedID)2-s2.0-85201565335 (Scopus ID)
Available from: 2024-09-12 Created: 2024-09-12 Last updated: 2025-02-05Bibliographically approved
Flink, H., Sundblad, G., Merilä, J. & Tibblin, P. (2024). Recreational fisheries selectively capture and harvest large predators. Fish and Fisheries, 25(5), 793-805
Open this publication in new window or tab >>Recreational fisheries selectively capture and harvest large predators
2024 (English)In: Fish and Fisheries, ISSN 1467-2960, E-ISSN 1467-2979, Vol. 25, no 5, p. 793-805Article in journal (Refereed) Published
Abstract [en]

Size- and species-selective harvest inevitably alters the composition of targeted populations and communities. This can potentially harm fish stocks, ecosystem functionality, and related services, as evidenced in numerous commercial fisheries. The high popularity of rod-and-reel recreational fishing, practiced by hundreds of millions globally, raises concerns about similar deteriorating effects. Despite its prevalence, the species and size selectivity of recreational fisheries remain largely unquantified due to a lack of combined catch data and fisheries-independent surveys. This study addresses this gap by using standardised monitoring data and over 60,000 digital angling catch reports from 62 distinct fisheries. The findings demonstrate a pronounced selectivity in recreational fisheries, targeting top predators and large individuals. Catch-and-release practices reduced the overall harvest by 60% but did not substantially alter this selectivity. The strong species- and size-specific selectivity mirror patterns observed in other fisheries, emphasising the importance of managing the potential adverse effects of recreational fisheries selective mortality and overfishing.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024
Keywords
angling, catch reports, catch-and-release, fish monitoring, trophic alteration, truncation
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-129783 (URN)10.1111/faf.12839 (DOI)001228784700001 ()2-s2.0-85193805641 (Scopus ID)
Funder
Swedish Research Council Formas, Dnr 2018‐00605The Crafoord Foundation, Dnr 20210648Swedish Agency for Marine and Water Management, Dnr 01702‐2023
Available from: 2024-05-31 Created: 2024-05-31 Last updated: 2025-02-05Bibliographically approved
Bergström, K., Berggren, H., Nordahl, O., Koch-Schmidt, P., Tibblin, P. & Larsson, P. (2024). Seasonal and Daily Movement Patterns by Wels Catfish (Silurus glanis) at the Northern Fringe of Its Distribution Range. Fishes, 9(7), Article ID 280.
Open this publication in new window or tab >>Seasonal and Daily Movement Patterns by Wels Catfish (Silurus glanis) at the Northern Fringe of Its Distribution Range
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2024 (English)In: Fishes, E-ISSN 2410-3888, Vol. 9, no 7, article id 280Article in journal (Refereed) Published
Abstract [en]

Fish behavior often varies across a species' distribution range. Documenting how behaviors vary at fringes in comparison to core habitats is key to understanding the impact of environmental variation and the evolution of local adaptations. Here, we studied the behavior of Wels catfish (Silurus glanis) in Lake M & ouml;ckeln, Sweden, which represent a European northern fringe population. Adult individuals (101-195 cm, N = 55) were caught and externally marked with data storage tags (DSTs). Fifteen DSTs were recovered a year after tagging, of which 11 tags contained long-term high-resolution behavioral data on the use of vertical (depth) and thermal habitats. This showed that the catfish already became active in late winter (<5 degrees C) and displayed nocturnal activity primarily during summer and late autumn. The latter included a transition from the bottom to the surface layer at dusk, continuous and high activity close to the surface during the night, and then descent back to deeper water at dawn. During the daytime, the catfish were mainly inactive in the bottom layer. These behaviors contrast with what is documented in conspecifics from the core distribution area, perhaps reflecting adaptive strategies to cope with lower temperatures and shorter summers.

Place, publisher, year, edition, pages
MDPI, 2024
Keywords
peripheral population, Siluriformes, behavior, data storage tags, biologgers, apex predator, freshwater
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-131995 (URN)10.3390/fishes9070280 (DOI)001278837700001 ()2-s2.0-85199526145 (Scopus ID)
Available from: 2024-08-21 Created: 2024-08-21 Last updated: 2025-02-05Bibliographically approved
Todisco, V., Hauber, M. M., Brett, M. T., Axen, C., Hindar, K., Tibblin, P. & Hylander, S. (2024). The Implications of Atlantic Salmon (Salmo salar L.) Fatty Acid Profiles for Their Thiamine Status. Ecology and Evolution, 14(10), Article ID e70478.
Open this publication in new window or tab >>The Implications of Atlantic Salmon (Salmo salar L.) Fatty Acid Profiles for Their Thiamine Status
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2024 (English)In: Ecology and Evolution, E-ISSN 2045-7758, Vol. 14, no 10, article id e70478Article in journal (Refereed) Published
Abstract [en]

Thiamine deficiency is an ongoing issue across the Northern Hemisphere, causing reproductive failure in multiple salmonid populations. In the Baltic Sea, a large brackish water system in northern Europe, previous research has suggested that this deficiency is associated with lipid-rich diets with a high proportion of docosahexaenoic acid (DHA, 22:6n-3). The mechanism proposed is that a diet abundant in highly unsaturated fatty acids, such as DHA, depletes thiamine as an antioxidant defense in adult salmonids, rather than allocating thiamine to the offspring. In light of this existing hypothesis, we here explore the relationship between diet history and the related fatty acid (FA), profiles, and thiamine status of Atlantic salmon (Salmo salar L.) in three systems: the Baltic Sea, the North Atlantic Ocean, and Lake V & auml;nern. Atlantic salmon inhabiting each system is known to have unique feeding histories and thiamine status. Our results showed that despite extensive sampling effort and distinct FA profiles, indicative of their diverse diets, there were no correlations between any FAs, including DHA, and the thiamine status of these populations. This finding does not support the above-mentioned hypothesis that diets rich in easily oxidized FAs would lead to lower thiamine concentrations in salmon tissues. Additionally, we found that changes in the salmon FA profiles throughout their life cycle are consistent for both low-thiamine populations from the Baltic Sea and medium-thiamine populations from North Atlantic Ocean, suggesting that these changes might not be involved in thiamine deficiency development.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024
Keywords
Atlantic salmon, DHA, diet history, fatty acids, M74, thiamin, thiamine
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-134173 (URN)10.1002/ece3.70478 (DOI)001368240800001 ()39463742 (PubMedID)2-s2.0-85207563690 (Scopus ID)
Available from: 2024-12-20 Created: 2024-12-20 Last updated: 2025-02-05Bibliographically approved
Todisco, V., Fridolfsson, E., Axen, C., Dahlgren, E., Ejsmond, M. J., Hauber, M. M., . . . Hylander, S. (2024). Thiamin dynamics during the adult life cycle of Atlantic salmon (Salmo salar). Journal of Fish Biology, 104(3), 807-824
Open this publication in new window or tab >>Thiamin dynamics during the adult life cycle of Atlantic salmon (Salmo salar)
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2024 (English)In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 104, no 3, p. 807-824Article in journal (Refereed) Published
Abstract [en]

Thiamin is an essential water-soluble B vitamin known for its wide range of metabolic functions and antioxidant properties. Over the past decades, reproductive failures induced by thiamin deficiency have been observed in several salmonid species worldwide, but it is unclear why this micronutrient deficiency arises. Few studies have compared thiamin concentrations in systems of salmonid populations with or without documented thiamin deficiency. Moreover, it is not well known whether and how thiamin concentration changes during the marine feeding phase and the spawning migration. Therefore, samples of Atlantic salmon (Salmo salar) were collected when actively feeding in the open Baltic Sea, after the sea migration to natal rivers, after river migration, and during the spawning period. To compare populations of Baltic salmon with systems without documented thiamin deficiency, a population of landlocked salmon located in Lake Vanern (Sweden) was sampled as well as salmon from Norwegian rivers draining into the North Atlantic Ocean. Results showed the highest mean thiamin concentrations in Lake Vanern salmon, followed by North Atlantic, and the lowest in Baltic populations. Therefore, salmon in the Baltic Sea seem to be consistently more constrained by thiamin than those in other systems. Condition factor and body length had little to no effect on thiamin concentrations in all systems, suggesting that there is no relation between the body condition of salmon and thiamin deficiency. In our large spatiotemporal comparison of salmon populations, thiamin concentrations declined toward spawning in all studied systems, suggesting that the reduction in thiamin concentration arises as a natural consequence of starvation rather than to be related to thiamin deficiency in the system. These results suggest that factors affecting accumulation during the marine feeding phase are key for understanding the thiamin deficiency in salmonids.

Place, publisher, year, edition, pages
John Wiley & Sons, 2024
Keywords
Atlantic salmon, Baltic Sea, M74 syndrome, Salmon life cycle, Thiamin, Thiamin deficiency
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-126410 (URN)10.1111/jfb.15584 (DOI)001115190600001 ()37823583 (PubMedID)2-s2.0-85178887480 (Scopus ID)
Available from: 2024-01-11 Created: 2024-01-11 Last updated: 2025-02-05Bibliographically approved
Berggren, H., Nordahl, O., Yildirim, Y., Larsson, P., Tibblin, P. & Forsman, A. (2023). Effects of environmental translocation and host characteristics on skin microbiomes of sun-basking fish. Proceedings of the Royal Society of London. Biological Sciences, 290(2013), Article ID 20231608.
Open this publication in new window or tab >>Effects of environmental translocation and host characteristics on skin microbiomes of sun-basking fish
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2023 (English)In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 290, no 2013, article id 20231608Article in journal (Refereed) Published
Abstract [en]

Variation in the composition of skin-associated microbiomes has been attributed to host species, geographical location and habitat, but the role of intraspecific phenotypic variation among host individuals remains elusive. We explored if and how host environment and different phenotypic traits were associated with microbiome composition. We conducted repeated sampling of dorsal and ventral skin microbiomes of carp individuals (Cyprinus carpio) before and after translocation from laboratory conditions to a semi-natural environment. Both alpha and beta diversity of skin-associated microbiomes increased substantially within and among individuals following translocation, particularly on dorsal body sites. The variation in microbiome composition among hosts was significantly associated with body site, sun-basking, habitat switch and growth, but not temperature gain while basking, sex, personality nor colour morph. We suggest that the overall increase in the alpha and beta diversity estimates among hosts were induced by individuals expressing greater variation in behaviours and thus exposure to potential colonizers in the pond environment compared with the laboratory. Our results exemplify how biological diversity at one level of organization (phenotypic variation among and within fish host individuals) together with the external environment impacts biological diversity at a higher hierarchical level of organization (richness and composition of fish-associated microbial communities).

Place, publisher, year, edition, pages
Royal Society, 2023
Keywords
freshwater, biodiversity, microbiota, skin microbiome, teleost, 16S amplicons
National Category
Ecology Microbiology
Research subject
Ecology, Microbiology
Identifiers
urn:nbn:se:lnu:diva-126932 (URN)10.1098/rspb.2023.1608 (DOI)001130342600003 ()38113936 (PubMedID)2-s2.0-85180809066 (Scopus ID)
Available from: 2024-01-19 Created: 2024-01-19 Last updated: 2025-02-05Bibliographically approved
Tibblin, P., Bergström, K., Flink, H., Hall, M., Berggren, H., Nordahl, O. & Larsson, P. (2023). Higher abundance of adult pike in Baltic Sea coastal areas adjacent to restored wetlands compared to reference bays. Hydrobiologia, 850, 2049-2060
Open this publication in new window or tab >>Higher abundance of adult pike in Baltic Sea coastal areas adjacent to restored wetlands compared to reference bays
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2023 (English)In: Hydrobiologia, ISSN 0018-8158, E-ISSN 1573-5117, Vol. 850, p. 2049-2060Article in journal (Refereed) Published
Abstract [en]

The abundance of pike, a keystone top-predator, have declined dramatically in the Baltic Sea since the 1990s likely owing to recruitment failure. It has been proposed that wetland restoration can aid the recovery of the pike stock by increasing the number of recruits produced by anadromous populations. Yet, no previous studies have addressed whether wetland restorations are associated with higher abundances of adult pike in the coastal habitat. To address this, we performed standardised rod-and-reel survey fishing in paired bays with and without wetlands across three coastal areas and 3 years. To estimate dispersal and the contribution of wetland pike to the coastal stock, we tagged captured pike with passive integrated responders (PIT) and employed PIT reader stations in wetland inlets. The results showed that pike abundances were on average 90% higher in bays with an adjacent wetland although the effect varied among areas. Moreover, PIT-data uncovered that wetland pike constituted a high proportion of the pike found in adjacent coastal habitats and that some wetland fish dispersed up to 10 km. These results support that wetland restoration is a valuable tool to aid the coastal pike stock and ultimately restore the function and services of the coastal ecosystem.

Place, publisher, year, edition, pages
Springer, 2023
Keywords
Conservation, Fish, Habitat restoration, Management, Spawning, Standardized rod-and-reel fishing
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-121480 (URN)10.1007/s10750-023-05216-4 (DOI)000971781400002 ()2-s2.0-85153063928 (Scopus ID)
Available from: 2023-06-08 Created: 2023-06-08 Last updated: 2025-02-05Bibliographically approved
Hall, M., Nordahl, O., Forsman, A. & Tibblin, P. (2023). Maternal size in perch (Perca fluviatilis) influences the capacity of offspring to cope with different temperatures. Frontiers in Marine Science, 10, Article ID 1175176.
Open this publication in new window or tab >>Maternal size in perch (Perca fluviatilis) influences the capacity of offspring to cope with different temperatures
2023 (English)In: Frontiers in Marine Science, E-ISSN 2296-7745, Vol. 10, article id 1175176Article in journal (Refereed) Published
Abstract [en]

Climate change causes earlier and warmer springs in seasonal environments and a higher incidence of extreme weather events. In aquatic environments, this changes the thermal conditions during spawning, and the thermal performance of eggs and embryos may determine the consequences of climate change on recruitment. In iteroparous species with indeterminate growth, the eggs produced by a given female in successive years will increase in size as the female grows larger and likely be exposed to different temperatures during incubation due to annual variation in spring phenology. Still, we know little about whether differences in maternal size impact the temperature-dependent performance and viability of the offspring. Here we utilised a thermal gradient laboratory experiment on Baltic Sea perch (Perca fluviatilis) to investigate how maternal size influence the temperature dependent hatching success of the offspring. The results uncovered a positive relationship between maternal size and average hatching success, but the shape of the relationship (reaction norm) linking hatching success to incubation temperature was independent of maternal size. However, we did find an association between maternal size and the variance (S.D. and CV) in hatching success across temperatures, with larger females producing offspring with maintained performance (less sensitive) across temperature treatments, indicative of flatter reaction norms and broader thermal niches. This suggests that maintaining the size distribution of fish populations, for instance through regulations of size-selective fisheries, may be important to aid the long-term productivity and viability of fish populations and ultimately conserve the function and services of ecosystems.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2023
Keywords
Baltic Sea, climate change, hatching, fish, global warming, reproduction, spawning, thermal tolerance
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-123587 (URN)10.3389/fmars.2023.1175176 (DOI)001026675800001 ()2-s2.0-85165047323 (Scopus ID)
Available from: 2023-08-10 Created: 2023-08-10 Last updated: 2025-02-05Bibliographically approved
Münnich, J., Hoppmann, F., Berggren, H., Nordahl, O. & Tibblin, P. (2023). The role of chemical communication in the predator-prey role reversal of northern pike (Esox lucius) and three-spined stickleback (Gasterosteus aculeatus). Fisheries Research, 258, Article ID 106537.
Open this publication in new window or tab >>The role of chemical communication in the predator-prey role reversal of northern pike (Esox lucius) and three-spined stickleback (Gasterosteus aculeatus)
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2023 (English)In: Fisheries Research, ISSN 0165-7836, E-ISSN 1872-6763, Vol. 258, article id 106537Article in journal (Refereed) Published
Abstract [en]

Predator-prey interactions can modify population dynamics and influence ecosystem functioning. An interesting, but less understood, aspect of such species interactions is predator-prey role reversal where a mesopredator can reduce the recruitment success, and ultimately the abundance, of their own predator. Such role reversal is ongoing in the Baltic Sea where increasing abundances of mesopredatory sticklebacks (Gasterosteus aculeatus) have resulted in intense predation on the recruits of their predator the northern pike (Esox lucius). Still, the mechanistic underpinning of this reversal remains poorly understood. Here we investigate the role of chemical communication in this predator-prey role reversal with the aim to understand whether and how sticklebacks use olfactory cues to assess whether pike constitutes a predator or prey. By performing a laboratory preference experiment, we show that chemical communication is indeed used by sticklebacks for assessing the predation risk emanated by adult pike but that it requires additional alarm cues (Schreckstoff) informing that sticklebacks are predated upon. Adult pike kairomones or alarm cues alone did not result in any adaptive response by sticklebacks nor did olfactory cues of pike as prey (pike larvae kairomones and dietary cues of zooplankton). This knowledge contributes to the understanding of predator-prey interactions as well as the dynamics of the shifting coastal fish community in the Baltic Sea. The results also suggest that addition of Schreckstoff to confined pike (and perch) spawning and recruitment habitats may deter sticklebacks from entering which should be further explored by management.

Place, publisher, year, edition, pages
Elsevier, 2023
Keywords
Behavior, Coastal, Olfaction, Predator -prey interactions
National Category
Ecology
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-118370 (URN)10.1016/j.fishres.2022.106537 (DOI)000895506500003 ()2-s2.0-85141257654 (Scopus ID)
Available from: 2023-01-16 Created: 2023-01-16 Last updated: 2025-02-05Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-6804-5342

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