المؤلفون: Gloria Mozzi, Daniel Nyqvist, Muhammad Usama Ashraf, Claudio Comoglio, Paolo Domenici, Sophia Schumann, Costantino Manes

المصدر: Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)

مصطلحات موضوعية: Fish movement, Group behaviour, Hydrodynamics, Artificial intelligence, Deep learning, Medicine, Science

الوصف: Abstract Social facilitation is a well-known phenomenon where the presence of organisms belonging to the same species enhances an individual organism’s performance in a specific task. As far as fishes are concerned, most studies on social facilitation have been conducted in standing-water conditions. However, for riverine species, fish are most commonly located in moving waters, and the effects of hydrodynamics on social facilitation remain largely unknown. To bridge this knowledge gap, we designed and performed flume experiments where the behaviour of wild juvenile Italian riffle dace (Telestes muticellus) in varying group sizes and at different mean flow velocities, was studied. An artificial intelligence (AI) deep learning algorithm was developed and employed to track fish positions in time and subsequently assess their exploration, swimming activity, and space use. Results indicate that energy-saving strategies dictated space use in flowing waters regardless of group size. Instead, exploration and swimming activity increased by increasing group size, but the magnitude of this enhancement (which quantifies social facilitation) was modulated by flow velocity. These results have implications for how future research efforts should be designed to understand the social dynamics of riverine fish populations, which can no longer ignore the contribution of hydrodynamics.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2045-2322Test

الوصول الحر: https://doaj.org/article/b9d4d2e92dba4701bc60fb2a5dccf9acTest

المؤلفون: Braden J. Judson, Bjarni K. Kristjánsson, Camille A.‐L. Leblanc, Moira M. Ferguson

المصدر: Ecology and Evolution, Vol 14, Iss 5, Pp n/a-n/a (2024)

مصطلحات موضوعية: colonization history, drift, ecological variation, fish movement, gene flow, geographic distance, Ecology, QH540-549.5

الوصف: Abstract Understanding the adaptability of small populations in the face of environmental change is a central problem in evolutionary biology. Solving this problem is challenging because neutral evolutionary processes that operate on historical and contemporary timescales can override the effects of selection in small populations. We assessed the effects of isolation by colonization (IBC), isolation by dispersal limitation (IBDL) as reflected by a pattern of isolation by distance (IBD), and isolation by adaptation (IBA) and the roles of genetic drift and gene flow on patterns of genetic differentiation among 19 cave‐dwelling populations of Icelandic Arctic charr (Salvelinus alpinus). We detected evidence of IBC based on the genetic affinity of nearby cave populations and the genetic relationships between the cave populations and the presumed ancestral population in the lake. A pattern of IBD was evident regardless of whether high‐level genetic structuring (IBC) was taken into account. Genetic signatures of bottlenecks and lower genetic diversity in smaller populations indicate the effect of drift. Estimates of gene flow and fish movement suggest that gene flow is limited to nearby populations. In contrast, we found little evidence of IBA as patterns of local ecological and phenotypic variation showed little association with genetic differentiation among populations. Thus, patterns of genetic variation in these small populations likely reflect localized gene flow and genetic drift superimposed onto a larger‐scale structure that is largely a result of colonization history. Our simultaneous assessment of the effects of neutral and adaptive processes in a tractable and replicated system has yielded novel insights into the evolution of small populations on both historical and contemporary timescales and over a smaller spatial scale than is typically studied.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2045-7758Test

الوصول الحر: https://doaj.org/article/407afbaf033445bd88e59061007bdcf8Test

المؤلفون: Miguet, Paul, Tissot, Laurence, Lambert, Patrick, Pauwels, Ine, S, Westrelin, Samuel

المساهمون: Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience (RECOVER), Aix Marseille Université (AMU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire National d’Hydraulique et Environnement (EDF R&D LNHE), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF), Ecosystèmes aquatiques et changements globaux (UR EABX), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Research Institute for Nature and Forest (INBO), Porgramme commun de recherche HYNES (INRAE-EDF R&D)

المصدر: ISSN: 1147-9213.

مصطلحات موضوعية: Spatially explicit modeling fish movement habitat selection acoustic telemetry spatialement explicite mouvement des poissons selection de l'habitat telemetrie acoustique, Spatially explicit modeling, fish movement, habitat selection, acoustic telemetry spatialement explicite, mouvement des poissons, selection de l'habitat, telemetrie acoustique, [SDE.BE]Environmental Sciences/Biodiversity and Ecology

الوصف: International audience ; Reservoirs are subject to artificial water level fluctuations leading to a degradation of the littoral habitats. This often results in reduced productivity and biological diversity, particularly for fish. The development of predictive tools of fish population dynamics linked to habitat characteristics can help to optimize management actions such as habitat restoration. We developed a spatially explicit individual-based model, the 3Plake model, which predicts the spatial distribution of three fish species, northern pike, European perch and pikeperch, over seasons and diel cycles according to their habitat use. The model was calibrated with an accurate description of habitat and high spatial and temporal resolution data of fish movements in a French reservoir. The model calibration is only based on a species-specific coefficient of habitat selectivity. It was chosen to (i) match the observed and simulated traveled hourly and daily distances and (ii) minimize a metric quantifying the distance between observed and simulated density maps. The 3Plake model correctly simulated the means of traveled distances and the species distributions along the year on the study reservoir. The minimal input required (HSI maps and maximum distance range) allows its easy implementation on other reservoirs and fish species. It could be used to assess the impact of habitat restoration or water level management scenarios on fish distribution. ; Les réservoirs sont soumis à des fluctuations artificielles du niveau de l’eau entraînant une dégradation des habitats littoraux. Elles entraînent souvent une réduction de la productivité et de la diversité biologiques, en particulier pour les poissons. Le développement d’outils prédictifs de la dynamique des populations de poissons, liés aux caractéristiques de l’habitat, peut aider à optimiser les actions de gestion telles que les mesures de restauration ou de gestion des niveaux d’eau. Nous avons développé un modèle individu-centré spatialement explicite, le modèle ...

العلاقة: hal-04541396; https://hal.inrae.fr/hal-04541396Test; https://hal.inrae.fr/hal-04541396/documentTest; https://hal.inrae.fr/hal-04541396/file/miguet_hydroEcol2024.pdfTest

الإتاحة: https://doi.org/10.1051/hydro/2024001Test
https://hal.inrae.fr/hal-04541396Test
https://hal.inrae.fr/hal-04541396/documentTest
https://hal.inrae.fr/hal-04541396/file/miguet_hydroEcol2024.pdfTest

المؤلفون: Leblanc, Camille A., Räsänen, Katja, Morrissey, Michael, Skúlason, Skúli, Ferguson, Moira, Kristjánsson, Bjarni K.

مصطلحات موضوعية: small population size, neutral processes, drift, phenotypic variation, morphology, lava cave, fish movement, morfologia, populaatiobiologia, populaatiogenetiikka, nieriä, fenotyyppi, populaatiot, populaatioekologia

الوصف: Background A major goal in evolutionary biology is to understand the processes underlying phenotypic variation in nature. Commonly, studies have focused on large interconnected populations or populations found along strong environmental gradients. However, studies on small fragmented populations can give strong insight into evolutionary processes in relation to discrete ecological factors. Evolution in small populations is believed to be dominated by stochastic processes, but recent work shows that small populations can also display adaptive phenotypic variation, through for example plasticity and rapid adaptive evolution. Such evolution takes place even though there are strong signs of historical bottlenecks and genetic drift. Here we studied 24 small populations of the freshwater fish Arctic charr (Salvelinus alpinus) found in groundwater filled lava caves. Those populations were found within a few km2-area with no apparent water connections between them. We studied the relative contribution of neutral versus non-neutral evolutionary processes in shaping phenotypic divergence, by contrasting patterns of phenotypic and neutral genetic divergence across populations in relation to environmental measurements. This allowed us to model the proportion of phenotypic variance explained by the environment, taking in to account the observed neutral genetic structure. Results These populations originated from the nearby Lake Mývatn, and showed small population sizes with low genetic diversity. Phenotypic variation was mostly correlated with neutral genetic diversity with only a small environmental effect. Conclusions Phenotypic diversity in these cave populations appears to be largely the product of neutral processes, fitting the classical evolutionary expectations. However, the fact that neutral processes did not explain fully the phenotypic patterns suggests that further studies can increase our understanding on how neutral evolutionary processes can interact with other forces of selection at early stages of divergence. ...

وصف الملف: application/pdf; fulltext

العلاقة: BMC Ecology and Evolution; 24; Leblanc, C. A., Räsänen, K., Morrissey, M., Skúlason, S., Ferguson, M., & Kristjánsson, B. K. (2024). Fine scale diversity in the lava: genetic and phenotypic diversity in small populations of Arctic charr Salvelinus alpinus. BMC Ecology and Evolution , 24 , Article 45. https://doi.org/10.1186/s12862-024-02232-3Test; CONVID_212351966; URN:NBN:fi:jyu-202404172954; http://urn.fi/URN:NBN:fi:jyu-202404172954Test

الإتاحة: http://urn.fi/URN:NBN:fi:jyu-202404172954Test

المؤلفون: Marek Šmejkal, Daniel Bartoň, Petr Blabolil, Tomáš Kolařík, Jan Kubečka, Zuzana Sajdlová, Allan T. Souza, Marek Brabec

المصدر: Movement Ecology, Vol 11, Iss 1, Pp 1-12 (2023)

مصطلحات موضوعية: Weather, Reproductive behaviour, Long-term monitoring, Fish movement, Migration, Phenology, Biology (General), QH301-705.5

الوصف: Abstract Background Animal migrations are periodic and relatively predictable events, and their precise timing is essential to the reproductive success. Despite large scientific effort in monitoring animal reproductive phenology, identification of complex environmental cues that determine the timing of reproductive migrations and temporal changes in the size of reproductive aggregations in relation to environmental variables is relatively rare in the current scientific literature. Methods We tagged and tracked 1702 individuals of asp (Leuciscus aspius), a large minnow species, and monitored with a resolution of one hour the size of their reproductive aggregations (counts of sexes present at the breeding grounds standardized by the sum of individuals in the season) over seven breeding seasons using passive integrated transponder tag systems. We examined the size of reproductive aggregations in relation to environmental cues of day number within a reproductive season (intra-year seasonality), water temperature, discharge, hour in a day (intra-day pattern), temperature difference between water and air, precipitation, atmospheric pressure, wind speed and lunar phase. A generalized additive model integrating evidence from seven breeding seasons and providing typical dynamics of reproductive aggregations was constructed. Results We demonstrated that all environmental cues considered contributed to the changes in the size of reproductive aggregations during breeding season, and that some effects varied during breeding season. Our model explained approximately 50% of the variability in the data and the effects were sex-dependent (models of the same structure were fitted to each sex separately, so that we effectively stratified on sex). The size of reproductive aggregations increased unimodally in response to day in season, correlated positively with water temperature and wind speed, was highest before and after the full moon, and highest at night (interacting with day in a season). Males responded negatively and females positively to increase in atmospheric pressure. Conclusion The data demonstrate complex utilization of available environmental cues to time reproductive aggregations in freshwater fish and their interactions during the reproductive season. The study highlights the need to acquire diverse data sets consisting of many environmental cues to achieve high accuracy of interpretation of reproductive timing. Graphical abstract

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2051-3933Test

الوصول الحر: https://doaj.org/article/f779fe6c6b6c4312b9f406e5bb7e78f7Test

المؤلفون: Korman, Josh, Gross, Edward S., Grimaldo, Lenny F.

المصدر: San Francisco Estuary and Watershed Science. 19(1)

مصطلحات موضوعية: entrainment, Delta Smelt, fish movement, particle tracking models, population models

الوصف: There has been considerable debate about effects of entrainment of endangered Delta Smelt (Hypomesus transpacificus) at water export facilities located in the Sacramento–San Joaquin River Delta. In this paper we use a behavior-driven movement model (BMM) to simulate the movement of adult Delta Smelt, which, in conjunction with a population dynamics model, estimates the proportion of the population that is lost to entrainment, i.e., proportional entrainment loss (PEL). Parameters of the population model are estimated by maximum likelihood by comparing predictions to data from Fall Midwater Trawl (FMWT) and Spring Kodiak Trawl (SKT) surveys, as well as to daily salvage estimates. Our objectives are to evaluate different movement behavior hypotheses, to rank estimates of PEL based on how well predictions fit the data, and to sharpen our understanding of the data to inform future research and monitoring decisions.We applied the modeling framework to data from water year 2002—a year when salvage was high—and tested 30 combinations of six behavior and five population dynamics models. More complex process and observation assumptions in the population model led to much improved fits in most cases, but did not appreciably influence PEL predictions, which were largely determined by movement predictions from the BMMs. Estimates of PEL varied considerably among behaviors (2% to 40%). The model with the highest predictive capability explained 98% of the variation in FMWT data across regions, 70% of the variation in SKT data across regions and surveys, and 28% and 43% of the daily variation in salvage at federal and state fish screening facilities, respectively. The PEL estimate from this model was 35%, more than double the original estimate from Kimmerer (2008) of 15%. While PEL estimates provided in this study should be considered preliminary, our framework for testing combined behavior-driven movement models and population dynamics models is an improvement compared to earlier efforts.

وصف الملف: application/pdf

الوصول الحر: https://escholarship.org/uc/item/8p60c0csTest

المؤلفون: Gross, Edward S., Korman, Josh, Grimaldo, Lenny F., MacWilliams, Michael L., Bever, Aaron J., Smith, Peter E.

المصدر: San Francisco Estuary and Watershed Science. 19(1)

مصطلحات موضوعية: Delta Smelt, fish movement, entrainment, hydrodynamics, particle-tracking, maximum likelihood

الوصف: Delta Smelt, Hypomesus transpacificus, is an endangered pelagic fish native to the San Francisco Estuary. The distribution of Delta Smelt in the estuary shifts landward from low-salinity habitat to freshwater habitat before spawning. This spawning migration often coincides with the first substantial freshwater inflow to the estuary during winter. To accomplish this landward shift in distribution, Delta Smelt are believed to use the tides by swimming to faster-moving currents during flood tides and then repositioning themselves to slower-moving currents to reduce seaward movement on ebb tides. Studies have hypothesized that the swimming behavior of Delta Smelt during this period is influenced by environmental conditions such as salinity and turbidity. The details of these swimming behaviors—including the extent to which flows, salinity, and turbidity affect behaviors and distributions—are uncertain. The spawning migration is of management interest because an increase in observed counts of Delta Smelt at the South Delta water-export facilities has coincided roughly with the spawning migration in many years. In this study, we investigated a range of hypothesized swimming behaviors using a three-dimensional particle-tracking model for water year 2002 during the spawning migration, and compared the predicted distributions of Delta Smelt to distributions inferred from catch data. Our goal was to improve understanding of the influence of Delta Smelt swimming on distribution, and, ultimately, to develop a modeling tool to help management agencies identify conditions associated with entrainment losses. Predictions of Delta Smelt distributions and entrainment varied greatly among behaviors. Without swimming, Delta Smelt would be rapidly transported seaward of Suisun Bay, while continuous tidal migration would move them deep into the interior Delta. These behaviors and a simple turbidity-driven behavior model predicted distributions inconsistent with observations, while more complex behavior rules allowed improved predictions.

وصف الملف: application/pdf

الوصول الحر: https://escholarship.org/uc/item/0dh783r5Test

المؤلفون: Barcelo-Serra, Margarida¹ mbarcelo@imedea.uib-csic.es, Cabanellas, Sebastià¹, Palmer, Miquel¹, Bolgan, Marta², Alós, Josep¹

المصدر: Scientific Reports. 2/26/2021, Vol. 11 Issue 1, p1-12. 12p.

مصطلحات موضوعية: *MOTORBOATS, *FISH movement (Christianity), *SWIMMING, *MARINE fishes, *BAYESIAN analysis

مستخلص: Motorboat noise is recognized as a major source of marine pollution, however little is known about its ecological consequences on coastal systems. We developed a State Space Model (SSM) that incorporates an explicit dependency on motorboat noise to derive its effects on the movement of resident fish that transition between two behavioural states (swimming vs. hidden). To explore the performance of our model, we carried out an experiment where free-living Serranus scriba were tracked with acoustic tags, while motorboat noise was simultaneously recorded. We fitted the generated tracking and noise data into our SSM and explored if the noise generated by motorboats passing at close range affected the movement pattern and the probability of transition between the two states using a Bayesian approach. Our results suggest high among individual variability in movement patterns and transition between states, as well as in fish response to the presence of passing motorboats. These findings suggest that the effects of motorboat noise on fish movement are complex and require the precise monitoring of large numbers of individuals. Our SSM provides a methodology to address such complexity and can be used for future investigations to study the effects of noise pollution on marine fish. [ABSTRACT FROM AUTHOR]

المؤلفون: Yuequn Huang, Rongcong Pang, Xiangtong Li, Wenjing Li, Zhanpeng Yang, Dunqiu Wang, Kun Dong

المصدر: Water, Vol 15, Iss 23, p 4066 (2023)

مصطلحات موضوعية: acoustic tag system, indices of fish movement behavior response, water quality indices of fish sensitivity, correlation analysis, evaluation system of water ecological health, Hydraulic engineering, TC1-978, Water supply for domestic and industrial purposes, TD201-500

الوصف: Using fish as indicator organisms to monitor water quality can accurately reflect the pollution status of aquatic environments in real time. Currently, there are limited quantitative and empirical studies on fish movement behavior. An experimental study on the fish movement behavior response during water quality change was conducted using an aquatic environment model. Advanced acoustic tag monitoring technology was used to qualitatively and quantitatively assess fish movement. Using the temporal and spatial distributions of fish motion behavioral trajectories during water quality change, the fish behavior response indicators were the distance between the fish and the source of pollution, the distance between the fish and the water surface, and fish swimming speed. The fish were sensitive to water quality factors, including dissolved oxygen (DO) content, microcystin aeruginosa toxin (MC-LR), and non-ionic ammonia (NH3). The correlations between indicator pairs were analyzed. A new water ecological health evaluation system based on these indicators was constructed, and aquatic ecological health in the field was evaluated using the new system. The evaluation showed a sub-healthy state in spring and a slightly morbid to morbid state in summer, which was consistent with the results based on water quality indices. The accuracy of the proposed assessment system was verified. This showed that the assessment method and grade division of the assessment system were reasonable and feasible and could reflect the health status of the aquatic ecological environment in real time. This study provides a basis for the assessment of the health and restoration effects of the aquatic ecological environment.

وصف الملف: electronic resource

العلاقة: https://www.mdpi.com/2073-4441/15/23/4066Test; https://doaj.org/toc/2073-4441Test

الوصول الحر: https://doaj.org/article/1d481eaf5c854fce82b2879b5235d745Test

المؤلفون: Smejkal, Marek, Barton, Daniel, Blabolil, Petr, Kolarik, Tomas, Kubecka, Jan, Sajdlova, Zuzana, Souza, Allan T., Brabec, Marek

المساهمون: Department of Forest Sciences, Institute for Atmospheric and Earth System Research (INAR), Ecosystem processes (INAR Forest Sciences)

مصطلحات موضوعية: Fish movement, Long-term monitoring, Migration, Phenology, Reproductive behaviour, Weather, 1181 Ecology, evolutionary biology

الوصف: BackgroundAnimal migrations are periodic and relatively predictable events, and their precise timing is essential to the reproductive success. Despite large scientific effort in monitoring animal reproductive phenology, identification of complex environmental cues that determine the timing of reproductive migrations and temporal changes in the size of reproductive aggregations in relation to environmental variables is relatively rare in the current scientific literature.MethodsWe tagged and tracked 1702 individuals of asp (Leuciscus aspius), a large minnow species, and monitored with a resolution of one hour the size of their reproductive aggregations (counts of sexes present at the breeding grounds standardized by the sum of individuals in the season) over seven breeding seasons using passive integrated transponder tag systems. We examined the size of reproductive aggregations in relation to environmental cues of day number within a reproductive season (intra-year seasonality), water temperature, discharge, hour in a day (intra-day pattern), temperature difference between water and air, precipitation, atmospheric pressure, wind speed and lunar phase. A generalized additive model integrating evidence from seven breeding seasons and providing typical dynamics of reproductive aggregations was constructed.Results We demonstrated that all environmental cues considered contributed to the changes in the size of reproductive aggregations during breeding season, and that some effects varied during breeding season. Our model explained approximately 50% of the variability in the data and the effects were sex-dependent (models of the same structure were fitted to each sex separately, so that we effectively stratified on sex). The size of reproductive aggregations increased unimodally in response to day in season, correlated positively with water temperature and wind speed, was highest before and after the full moon, and highest at night (interacting with day in a season). Males responded negatively and females positively ...

وصف الملف: application/pdf

العلاقة: Smejkal , M , Barton , D , Blabolil , P , Kolarik , T , Kubecka , J , Sajdlova , Z , Souza , A T & Brabec , M 2023 , ' Diverse environmental cues drive the size of reproductive aggregation in a rheophilic fish ' , Movement Ecology , vol. 11 , no. 1 , 16 . https://doi.org/10.1186/s40462-023-00379-0Test; ORCID: /0000-0002-1851-681X/work/133999616; 85150876119; b8551a7c-cbe6-4b44-9505-b16f2ece7cdc; http://hdl.handle.net/10138/357447Test; 000957375100001

الإتاحة: http://hdl.handle.net/10138/357447Test