Article
Environmental Sciences
Ossi Keva, Mikko Kiljunen, Heikki Hamalainen, Roger Jones, Kimmo K. Kahilainen, Paula Kankaala, Miikka B. Laine, Jos Schilder, Ursula Strandberg, Jussi Vesterinen, Sami J. Taipale
Summary: Environmental change can affect the nutritional quality of fish muscle for human consumption, as shown in a study on Eurasian perch. The study found that perch allochthony increased with decreasing lake pH and increasing forest coverage, and perch muscle THg and n6-FA content also increased with forest coverage. In contrast, perch muscle DHA content decreased and ALA content increased towards shallower and murkier lakes. The study suggests that the quality of perch muscle decreases with increasing forest coverage and decreasing pH, potentially due to increasing fish allochthony.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biochemistry & Molecular Biology
Mikhail Ozerov, Kristina Noreikiene, Siim Kahar, Magnus Huss, Ari Huusko, Toomas Koiv, Margot Sepp, Maria-Eugenia Lopez, Anna Gardmark, Riho Gross, Anti Vasemagi
Summary: Extreme environments are inhospitable to most species, but some organisms have evolved to survive in such conditions. A study found that adaptation to acidic humic lakes involves hundreds of genomic regions. Signals of adaptation were detected in genes and gene families involved in organism development and ion transportation. The importance of adaptive evolution via regulatory elements was highlighted.
Article
Environmental Sciences
Silvia Galafassi, Maria Sighicelli, Antonio Pusceddu, Roberta Bettinetti, Alessandro Cau, Maria Eleonora Temperini, Raymond Gillibert, Michele Ortolani, Loris Pietrelli, Silvia Zaupa, Pietro Volta
Summary: This study investigated the presence of microplastic particles in the digestive system of perch in four south-alpine lakes and found that 86% of the analyzed specimens contained MPs. Despite the high number of ingested MPs, fish health was not affected, but the fullness index showed a potential interference with feeding activity.
ENVIRONMENTAL POLLUTION
(2021)
Article
Fisheries
Katrit Karus, Matiss Zagars, Helen Agasild, Tonu Feldmann, Arvo Tuvikene, Linda Puncule, Priit Zingel
Summary: This study investigated the relationship between the planktonic food base and feeding patterns of juvenile Eurasian perch. The results showed that zooplankton accounted for over 90% of the diet biomass in perch and there were clear correlations between zooplankton biomass, perch stomach content, and fish growth rate. The study also suggested that nutrient enrichment can positively impact perch feeding conditions in lakes.
ECOLOGY OF FRESHWATER FISH
(2023)
Article
Environmental Sciences
Olof Regnell, Sylvie V. M. Tesson, Nikolay Oskolkov, Michelle Nerentorp
Summary: A study found a positive correlation between selenium and mercury in freshwater fish. Selenium mitigates the toxicity of mercury but can divert from biosynthetic pathways. The study also observed a surplus of selenium in fish and found that it decreased with fish weight. This suggests that selenium accumulation is subject to homeostatic control and is related to the burden of mercury and selenium requirement.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Marine & Freshwater Biology
Sture Hansson, Ulf Larsson, Jakob Walve
Summary: We compared fish catch data for perch from two archipelago areas in the Baltic Sea, one heavily impacted by coastal development and the other less impacted, and found no general differences in catches between the two areas.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Environmental Sciences
Marcus Hall, Oscar Nordahl, Anders Forsman, Petter Tibblin
Summary: Climate change affects seasonal environments and aquatic ecosystems by causing earlier and warmer springs, leading to significant changes in the thermal conditions for spawning and the viability of fish eggs and embryos. The study found that maternal size influenced the hatching success of Baltic Sea perch offspring, with larger females producing offspring with better performance across temperature treatments. Maintaining the size distribution of fish populations is crucial for the long-term productivity and viability of fish populations and the overall conservation of ecosystems.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Agriculture, Dairy & Animal Science
Mahyar Zare, Hung Quang Tran, Marketa Prokesova, Vlastimil Stejskal
Summary: The study found that adding garlic powder to the diet of European perch can improve overall body composition, feed digestibility, immunohematological effects, and resistance against overcrowding stress.
Article
Biology
Andreas Ekstrom, Erika Sundell, Daniel Morgenroth, Tristan McArley, Anna Gardmark, Magnus Huss, Erik Sandblom
Summary: The study found that European perch can thermally adjust physiological traits to increase tolerance to hypoxia, especially in the face of long-term climate warming. This suggests that some fish species may have a certain level of resilience to the decreased hypoxia tolerance caused by climate warming.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2021)
Article
Anatomy & Morphology
Azad Teimori, Mohammad Reza Esmaeili, Mina Motamedi
Summary: The study revealed size-dependent alternations in the scale surface ornamentation of Aphanius hormuzensis, with clear differences between small and large-sized fishes. These character variations could explain certain developmental stages in this species and caution should be exercised when using these characters for taxonomic studies of aphaniid fishes.
MICROSCOPY RESEARCH AND TECHNIQUE
(2021)
Article
Ecology
Barbara Angelio Quirino, Martin Sondergaard, Torben Linding Lauridsen, Liselotte Sander Johansson, Rosemara Fugi, Sidinei Magela Thomaz, Fernando Miranda Lansac-Toha, Erik Jeppesen
Summary: Fish community structure in shallow lakes is influenced by macrophyte cover, which provides important habitats and food sources. This study examined the relationships between fish and macrophytes at both lake and point scales in 88 Danish shallow lakes. The results showed negative relationships between macrophyte cover and fish abundance and biomass, with stronger effects at the point scale. Chlorophyll a, a measure of primary productivity, was positively related to fish abundance, except for certain fish species. The findings highlight the complex interactions between fish and macrophytes, which are influenced by lake characteristics.
FRESHWATER BIOLOGY
(2023)
Article
Fisheries
Marine Vautiera, Cecile Chardon, Chloe Goulona, Jean Guillarda, Isabelle Domaizon
Summary: This study developed a quantitative environmental DNA (eDNA) approach to monitor the spawning activity of European perch and whitefish in Lake Geneva. The results showed that the weekly sampling coupled with droplet digital PCR (ddPCR) was effective in identifying the timing and peak of spawning activity. It was also emphasized that the use of a control species helped to discriminate the eDNA signal associated with spawning. Recommendations were made for future implementation, including an integrative sampling strategy and a longer sampling period.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Aatu Turunen, Andres Salgado-Ismodes, Hannu Huuskonen, Kimmo K. Kahilainen, Mikko Olin, Jukka Ruuhijarvi, Anssi Vainikka
Summary: Management of inland recreational fisheries can benefit from data on stock abundance and size structure. Ice fishing, using standardized angling methods, can provide information on the abundance of different-sized fish in small lakes. Our study found that the length distribution of fish caught through ice fishing was similar to the traditional gillnets method, indicating it can be a valid indicator for management purposes.
FISHERIES MANAGEMENT AND ECOLOGY
(2023)
Article
Fisheries
Ashley Trudeau, Thomas Mehner, Thomas Klefoth, Sven Matern, Robert Nikolaus, Robert Arlinghaus
Summary: The trophic niche of aquatic generalist predators is affected by factors such as ontogeny, habitat characteristics, availability and type of prey, and competitive interactions. The study used Eurasian perch as the model species to explore the correlation between multiple lake and fish community characteristics and the size-dependency of perch populations' trophic niche. The results showed that perch populations in shallower lakes reached a higher trophic position at smaller sizes compared to those in deeper lakes. However, the changes in trophic position with increasing size were less significant in perch from deeper lakes, with large individuals achieving higher mean trophic positions. This suggests that deeper lakes are more likely to support the development of large, piscivorous perch compared to shallower lakes.
ECOLOGY OF FRESHWATER FISH
(2023)
Article
Ecology
Kristin Scharnweber, Matilda L. Andersson, Fernando Chaguaceda, Peter Eklov
Summary: Metabolism plays a key role in shaping specific TDF (i.e., Delta C-13 and Delta N-15 of muscle tissue) and highlights significant differences between individuals of different ontogenetic stages within a species.
ECOLOGY AND EVOLUTION
(2021)
Article
Fisheries
Renee M. van Dorst, Anna Gardmark, Richard Svanback, Magnus Huss
Summary: The study shows that the effects of browning-induced light limitation on roach body growth vary over ontogeny, possibly due to changes in zooplankton community composition caused by browning and differences in prey selectivity between young-of-the-year and 1-year-old fish.
ECOLOGY OF FRESHWATER FISH
(2022)
Article
Multidisciplinary Sciences
William D. Hintz, Shelley E. Arnott, Celia C. Symons, Danielle A. Greco, Alexandra McClymont, Jennifer A. Brentrup, Miguel Canedo-Arguelles, Alison M. Derry, Amy L. Downing, Derek K. Gray, Stephanie J. Melles, Rick A. Relyea, James A. Rusak, Catherine L. Searle, Louis Astorg, Henry K. Baker, Beatrix E. Beisner, Kathryn L. Cottingham, Zeynep Ersoy, Carmen Espinosa, Jaclyn Franceschini, Angelina T. Giorgio, Norman Gobeler, Emily Hassal, Marie-Pier Hebert, Mercedes Huynh, Samuel Hylander, Kacie L. Jonasen, Andrea E. Kirkwood, Silke Langenheder, Ola Langvall, Hjalmar Laudon, Lovisa Lind, Maria Lundgren, Lorenzo Proia, Matthew S. Schuler, Jonathan B. Shurin, Christopher F. Steiner, Maren Striebel, Simon Thibodeau, Pablo Urrutia-Cordero, Lidia Vendrell-Puigmitja, Gesa A. Weyhenmeyer
Summary: Human-induced salinization poses a major threat to freshwater ecosystems. Current water quality guidelines are insufficient to protect lake food webs. New guidelines are urgently needed to safeguard lake ecosystems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Limnology
Marie-Pier Hebert, Celia C. Symons, Miguel Canedo-Arguelles, Shelley E. Arnott, Alison M. Derry, Vincent Fugere, William D. Hintz, Stephanie J. Melles, Louis Astorg, Henry K. Baker, Jennifer A. Brentrup, Amy L. Downing, Zeynep Ersoy, Carmen Espinosa, Jaclyn M. Franceschini, Angelina T. Giorgio, Norman Gobeler, Derek K. Gray, Danielle Greco, Emily Hassal, Mercedes Huynh, Samuel Hylander, Kacie L. Jonasen, Andrea Kirkwood, Silke Langenheder, Ola Langvall, Hjalmar Laudon, Lovisa Lind, Maria Lundgren, Alexandra McClymont, Lorenzo Proia, Rick A. Relyea, James A. Rusak, Matthew S. Schuler, Catherine L. Searle, Jonathan B. Shurin, Christopher F. Steiner, Maren Striebel, Simon Thibodeau, Pablo Urrutia Cordero, Lidia Vendrell-Puigmitja, Gesa A. Weyhenmeyer, Beatrix E. Beisner
Summary: This study conducted a large-scale mesocosm experiment across multiple sites in North America and Europe to investigate the response of lake zooplankton communities to varying chloride concentrations. The findings suggest that crustaceans are more sensitive to elevated chloride levels than rotifers, and that there is a consistent decrease in abundance and taxon richness with increasing salinity across different taxonomic groups. However, functional diversity shows a weaker loss compared to taxonomic diversity.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Article
Ecology
Wojciech Uszko, Magnus Huss, Anna Gardmark
Summary: Global warming can change the size distributions of animal communities, but the contribution of size shifts within species versus between species to these changes is not clear. This study found that warming shifted community size structure towards dominance of smaller species, but this result was dependent on a size-temperature interaction favoring smaller individuals in warm environments. However, the same mechanism caused a shift towards dominance of larger stages within species, reconciling disparate observations of size responses within and across zooplankton species in the literature.
Letter
Biodiversity Conservation
Jinling Wang, Yongqiang Zhou, Lei Zhou, Yunlin Zhang, Boqiang Qin, Robert G. M. Spencer, Justin D. Brookes, Erik Jeppesen, Gesa A. Weyhenmeyer, Fengchang Wu
GLOBAL CHANGE BIOLOGY
(2023)
Article
Limnology
Shelley E. Arnott, Vincent Fugere, Celia C. Symons, Stephanie J. Melles, Beatrix E. Beisner, Miguel Canedo-Arguelles, Marie-Pier Hebert, Jennifer A. Brentrup, Amy L. Downing, Derek K. Gray, Danielle Greco, William D. Hintz, Alexandra McClymont, Rick A. Relyea, James A. Rusak, Catherine L. Searle, Louis Astorg, Henry K. Baker, Zeynep Ersoy, Carmen Espinosa, Jaclyn M. Franceschini, Angelina T. Giorgio, Norman Gobeler, Emily Hassal, Mercedes Huynh, Samuel Hylander, Kacie L. Jonasen, Andrea Kirkwood, Silke Langenheder, Ola Langvall, Hjalmar Laudon, Lovisa Lind, Maria Lundgren, Emma R. Moffett, Lorenzo Proia, Matthew S. Schuler, Jonathan B. Shurin, Christopher F. Steiner, Maren Striebel, Simon Thibodeau, Pablo Urrutia Cordero, Lidia Vendrell-Puigmitja, Gesa A. Weyhenmeyer, Alison M. Derry
Summary: The salinization of freshwaters poses a global threat to aquatic biodiversity. The study quantified the variation in chloride (Cl-) tolerance among 19 freshwater zooplankton species in four countries. The results showed high variation in Cl- tolerance among populations, with zooplankton community composition being the only factor that explained this variation. The large intraspecific variation in Cl- tolerance suggests that water quality guidelines should consider multiple populations and communities.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Article
Ecology
Viktor Thunell, Anna Gardmark, Magnus Huss, Yngvild Vindenes
Summary: Body size-dependent physiological effects of temperature influence individual growth, reproduction, and survival, which govern animal population responses to global warming. In this study, a dynamic energy budget integral projection model (DEB-IPM) was developed to investigate how warming affects the optimal energy allocation and adaptation of size-structured organisms. The results show that increasing temperature leads to a decrease in optimal energy allocation to growth and induces changes in body size and population structure.
Article
Ecology
Marius Roesti, Jeffrey S. Groh, Stephanie A. Blain, Magnus Huss, Peter Rassias, Daniel I. Bolnick, Yoel E. Stuart, Catherine L. Peichel, Dolph Schluter
Summary: Species competing for resources commonly share predators. However, the effects of shared predation are still not well understood. In this study, we compared antipredator and trophic phenotypes between sympatric and allopatric populations of threespine stickleback and prickly sculpin fish that are all exposed to a trout predator. Our findings show that there is divergence in antipredator traits between the species, with stickleback exhibiting increased antipredator adaptations in sympatry and sculpin exhibiting decreased adaptations. The changes in feeding morphology, diet, and habitat use were primarily driven by stickleback evolution. These results suggest that asymmetric ecological character displacement indirectly influenced the vulnerability of stickleback and sculpin to shared predation, leading to divergence in antipredator traits between sympatric species.
Article
Limnology
Aurelie Garnier, Orjan Ostman, Jenny Ask, Olivia Bell, Martin Berggren, Mayra P. D. Rulli, Hani Younes, Magnus Huss
Summary: Coastal eutrophication caused by excessive anthropogenic nutrient input is a global threat, particularly in estuaries and semi-enclosed waterbodies. Additionally, coastal waters can become darker due to increased input of colored compounds. However, the effects of darkening on coastal food webs in response to eutrophication are unknown. A study using mesocosm experiments found that darkening and nutrient enrichment led to higher algal biomass, but fish had no cascading effect on algae. This highlights the additional challenge that coastal darkening poses for the recovery of coastal waters from eutrophication.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Ecology
Jingyao Niu, Magnus Huss, Anti Vasemagi, Anna Gardmark
Summary: How does warming affect maturation and reproductive investment in ectotherms? This study investigates the effects of warming on maturation and reproductive investment in wild fish populations through a whole-ecosystem heating experiment in the Baltic Sea. The results show that warming has substantial effects on maturation size independent of body growth changes, with young fish maturing at a smaller size and investing more in gonad development in the heated population. Furthermore, after multiple generations of warming, maturation and reproduction traits differed from the initial generations, suggesting warming-induced evolution may have occurred.
Article
Ecology
Clarissa Brazil-Sousa, Bruno Eleres Soares, Richard Svanback, Miriam Pilz Albrecht
Summary: Individual specialization refers to differences in resource use within a population that are not related to factors such as growth, sexual dimorphism, or morphological variation. A wider niche promotes individual specialization as individuals can segregate in niche space. Trophic position plays a role in determining the level of individual specialization, with populations at intermediate and high trophic levels displaying higher levels of specialization. We found that regardless of trophic position, niche breadth positively affects the degree of individual specialization in fish populations from the upper Tocantins River. Omnivory did not have a significant impact on individual specialization. These findings highlight the relationship between individual specialization, trophic position, and niche breadth in tropical fish.
Review
Limnology
Kaitlin L. Reinl, Ted D. Harris, Rebecca L. North, Pablo Almela, Stella A. Berger, Mina Bizic, Sarah H. Burnet, Hans-Peter Grossart, Bastiaan W. Ibelings, Ellinor Jakobsson, Lesley B. Knoll, Brenda M. Lafrancois, Yvonne McElarney, Ana M. Morales-Williams, Ulrike Obertegger, Igor Ogashawara, Ma Cristina Paule-Mercado, Benjamin L. Peierls, James A. Rusak, Siddhartha Sarkar, Sapna Sharma, Jessica V. Trout-Haney, Pablo Urrutia-Cordero, Jason J. Venkiteswaran, Danielle J. Wain, Katelynn Warner, Gesa A. Weyhenmeyer, Kiyoko Yokota
Summary: Cyanobacterial blooms have negative impacts on freshwater ecosystems, including releasing toxins, blocking light, and depleting oxygen. Climate change may promote cyanobacterial blooms, as increasing lake surface temperature can enhance their growth. Recent evidence shows that cyanobacterial blooms can also occur in cold-water temperatures (< 15 degrees C), even under ice-covered conditions.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Correction
Multidisciplinary Sciences
Gesa A. Weyhenmeyer, Ulrike Obertegger, Hugo Rudebeck, Ellinor Jakobsson, Joachim Jansen, Galina Zdorovennova, Sheel Bansal, Benjamin D. Block, Cayelan C. Carey, Jonathan P. Doubek, Hilary Dugan, Oxana Erina, Irina Fedorova, Janet M. Fischer, Laura Grinberga, Hans-Peter Grossart, Kulli Kangur, Lesley B. Knoll, Alo Laas, Fabio Lepori, Jacob Meier, Nikolai Palshin, Mark Peternell, Merja Pulkkanen, James A. Rusak, Sapna Sharma, Danielle Wain, Roman Zdorovennov
NATURE COMMUNICATIONS
(2023)