Article
Ecology
Zegni Triki, Stephanie Fong, Mirjam Amcoff, Niclas Kolm
Summary: The study experimentally investigated the influence of mosaic brain evolution on cognitive ability by artificially selecting male guppies for different telencephalon sizes. The results showed that males with larger telencephalons outperformed those with smaller telencephalons in executive cognitive tasks, providing experimental evidence that evolutionary enlargement of telencephalon size confers cognitive benefits.
Article
Behavioral Sciences
Stella A. Encel, Timothy M. Schaerf, Ashley J. W. Ward
Summary: This study examined the effects of an immune challenge, induced through exposure to bacterial lipopolysaccharides (LPS), on individual and social behavior in female guppies. The research found that healthy individuals showed a preference to associate with saline-injected fish rather than LPS-injected fish. In addition, LPS-injected fish exhibited greater dispersion and less collective behavior cohesion at the group level.
BEHAVIORAL ECOLOGY
(2023)
Article
Biology
Zegni Triki, Maria Granell-Ruiz, Stephanie Fong, Mirjam Amcoff, Niclas Kolm
Summary: Understanding how variation in brain morphology affects cognitive abilities is crucial for understanding individual differences in cognition and cognitive evolution. However, there is limited experimental data available that quantifies both cognitive abilities and brain morphology in the same individuals. In this study, female guppies were tested in two tasks to evaluate their learning abilities and cognitive flexibility, and brain regions were measured to estimate their size. The results showed that different brain regions have distinct functional correlations with cognitive tasks, with telencephalon size emerging as an important neural correlate of cognitive flexibility.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Environmental Sciences
Jessica C. S. Rabelo, Alex L. Hanusch, Lazaro Wender O. de Jesus, Lorena A. Mesquita, Fernanda C. Franco, Raquel A. Silva, Simone M. T. Saboia-Morais
Summary: The study showed that exposure to the cyanotoxin cylindrospermopsin (CYN) led to genotoxic effects in the brain, liver, blood cells, and erythrocytes of P. reticulata. The findings suggest potential harm of CYN to aquatic organisms and human health.
ENVIRONMENTAL TOXICOLOGY
(2021)
Article
Fisheries
Annika Boussard, Stephanie Edlund, Stephanie Fong, David Wheatcroft, Niclas Kolm
Summary: Over recent decades, substantial research has focused on fish cognitive evolution. One important but understudied aspect is sexual dimorphism in cognitive abilities. This study investigates whether increases in telencephalon size affect cognitive abilities differently in males and females. The results suggest no clear sex-specific effects in response to selection of telencephalon size.
Article
Multidisciplinary Sciences
Josephine R. Paris, James R. Whiting, Mitchel J. Daniel, Joan Ferrer Obiol, Paul J. Parsons, Mijke J. van der Zee, Christopher W. Wheat, Kimberly A. Hughes, Bonnie A. Fraser
Summary: Extreme colour pattern variation in male Trinidadian guppies is influenced by both natural selection and sexual selection. This study found that colour pattern is associated with genetic diversity on an autosome, rather than a 'supergene' on the sex chromosome.
NATURE COMMUNICATIONS
(2022)
Article
Biotechnology & Applied Microbiology
Xiuxia Chen, Hui Gong, Hongshu Chi, Binfu Xu, Zaiyu Zheng, Yulin Bai
Summary: The study reveals that guppies exposed to seawater can adapt to various salinity changes and shows significant gene expression changes in their gills, particularly in processes related to ion transport, metabolism, and immunity. Oxidative phosphorylation plays a crucial role in osmoregulation, while pathways involving ER-mediated phagocytosis, starch and sucrose metabolism, and cytokine-cytokine receptor interaction are downregulated. The study emphasizes the importance of gene expression in guppy adaptation to seawater, shedding light on osmotic regulation, metabolism, and immune response.
MARINE BIOTECHNOLOGY
(2021)
Article
Ecology
Mingjia Xu, Chunnuan Zhang, Qian Qi, Renpeng Wang, Shibo Zhang, Runkun Yan, Bin Li, Shengnan Li
Summary: The study aimed to investigate the impact of salinity on anxiety behavior and liver antioxidant capacity in guppies. Guppies were exposed to different salinities and their behavior and antioxidant enzyme activity were analyzed. Results showed that high salinity enhanced anxiety behavior in guppies and increased the activity of antioxidant enzymes. Drastic changes in salinity should be avoided during culture.
Article
Environmental Sciences
Xuefu Li, Shaoguo Ru, Hua Tian, Suqiu Zhang, Zhenxian Lin, Ming Gao, Jun Wang
Summary: The co-exposure of copper and 2,2'-dithiobis-pyridine ((PS)(2)) resulted in significant reproductive toxicity in male guppies, causing decreased testosterone levels, spermatozoon apoptosis and necrosis, reduced sexual interest, and ultimately reproductive failure. This study highlights the potential ecological risks associated with the widespread use of metal pyrithiones in antifouling paints.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Ecology
Regina Vega-Trejo, Catarina Vila-Pouca, David J. Mitchell, Alexander Kotrschal
Summary: Predation pressure can impact the size and morphology of an individual's brain, but this effect is dependent on the individual's body size.
EVOLUTIONARY ECOLOGY
(2022)
Article
Ecology
Mayuko Kawamoto, Yuu Ishii, Masakado Kawata
Summary: This study investigates the genetic basis of orange spot formation in guppies, a model organism for sexual selection research. Through RNA-seq analysis, it was found that orange spots in male guppies might be formed by secondary differentiation of xanthophores induced by specific signaling pathways. The study also identified candidate genes associated with the areas and saturation levels of orange spots, providing insights into the genetic and cellular regulatory mechanisms underlying sexual ornamentation.
BMC ECOLOGY AND EVOLUTION
(2021)
Article
Environmental Sciences
K. J. G. Diaz-Resendiz, A. T. Hermosillo-Escobedo, G. H. Ventura-Ramon, G. A. Toledo-Ibarra, D. A. Giron-Perez, A. Y. Bueno-Duran, M. I. Giron-Perez
Summary: This study evaluated and compared the effects of pesticides Temephos and spinosad on leukocytes in guppy fish. The results showed that Temephos caused leukocyte death, while spinosad did not. This indicates that Temephos has chronic effects on immune response cells.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH
(2022)
Article
Environmental Sciences
Lunara Kenida Lessa Martins, Joao Marcos De Lima-Faria, Lucas Nunes Guimaraes, Victoria Costa da Silva, Paulo Cesar Moreira, Simone Maria Teixeira de Saboia-Morais
Summary: This study investigates the interaction between citrate functionalized iron oxide nanoparticles (IONPs) and glyphosate-based herbicides in water and their effects on the liver of female Poecilia reticulata. The results indicate that the association of herbicides with IONPs induces liver damage and inflammatory responses, leading to cellular detoxification processes and immune responses. The damage is time and concentration dependent, increasing with exposure time and glyphosate concentration.
ENVIRONMENTAL TOXICOLOGY
(2022)
Article
Environmental Sciences
Nicholas Silvestre de Souza Trigueiro, Bruno Bastos Gonsalves, Felipe Cirqueira Dias, Emilia Celma de Oliveira Lima, Thiago Lopes Rocha, Simone Maria Teixeira Saboia-Morais
Summary: The co-exposure of iron oxide nanoparticles and glyphosate-based herbicide induced genotoxicity and mutagenicity in freshwater fish, with effects becoming more pronounced over time.
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
(2021)
Article
Agriculture, Dairy & Animal Science
Serena Ricci, Maurizio Lazzari, Maria Gabriella Maurizii, Valeria Franceschini, Liliana Milani, Pietro Cacialli
Summary: CLASP2 plays an important role in microtubule dynamics and chromosome movement. While its role in germ cell development has been well studied in Drosophila and mice, its role in fish germ cell differentiation remains unclear. This study using zebrafish and guppy models suggests a potential role for CLASP2 in the later stage of spermiogenesis in fish.
Article
Ecology
Alberto Corral-Lopez, Maksym Romensky, Alexander Kotrschal, Severine D. Buechel, Niclas Kolm
JOURNAL OF EVOLUTIONARY BIOLOGY
(2020)
Article
Ecology
Laszlo Zsolt Garamszegi, Hans Temrin, Eniko Kubinyi, Adam Miklosi, Niclas Kolm
JOURNAL OF EVOLUTIONARY BIOLOGY
(2020)
Article
Ecology
Yan Huang, Chun Lan Mai, Wen Bo Liao, Alexander Kotrschal
Article
Ecology
Will Sowersby, Simon Eckerstrom-Liedholm, Alexander Kotrschal, Joacim Naslund, Piotr Rowinski, Alejandro Gonzalez-Voyer, Bjorn Rogell
Summary: Research suggests that there may not be a trade-off between brain size and life-history pace in killifish, as fast-living species have larger relative brain sizes in adulthood compared to slow-living species. This discrepancy could potentially be due to differences in the timing of somatic versus neural growth or cognitive demands in their respective environments.
Review
Ecology
Regina Vega-Trejo, Raissa A. Boer, John L. Fitzpatrick, Alexander Kotrschal
Summary: Inbreeding depression affects males and females differently, with females experiencing slightly higher levels of inbreeding depression. Despite considering factors such as sexual size dimorphism, heterogamety, trait types, and testing environment, there is still a large amount of unexplained heterogeneity. Further research across different species is needed to understand the occurrence and causes of sex-specific inbreeding depression.
Article
Ecology
Regina Vega-Trejo, Catarina Vila-Pouca, David J. Mitchell, Alexander Kotrschal
Summary: Predation pressure can impact the size and morphology of an individual's brain, but this effect is dependent on the individual's body size.
EVOLUTIONARY ECOLOGY
(2022)
Article
Biology
Zegni Triki, Maria Granell-Ruiz, Stephanie Fong, Mirjam Amcoff, Niclas Kolm
Summary: Understanding how variation in brain morphology affects cognitive abilities is crucial for understanding individual differences in cognition and cognitive evolution. However, there is limited experimental data available that quantifies both cognitive abilities and brain morphology in the same individuals. In this study, female guppies were tested in two tasks to evaluate their learning abilities and cognitive flexibility, and brain regions were measured to estimate their size. The results showed that different brain regions have distinct functional correlations with cognitive tasks, with telencephalon size emerging as an important neural correlate of cognitive flexibility.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Multidisciplinary Sciences
Wen Bo Liao, Ying Jiang, Da Yong Li, Long Jin, Mao Jun Zhong, Yin Qi, Stefan Lupold, Alexander Kotrschal
Summary: While crypsis is a prominent antipredator adaptation, the role of the brain in predator-driven evolution remains controversial. This study provides comparative evidence across 102 Chinese frog species, suggesting that reduced predation risk through crypsis can relax predation-driven selection on the brain, allowing frogs to use their large brain for cognitive predator evasion.
Article
Ecology
Pamela M. Prentice, Alex Thornton, Niclas Kolm, Alastair J. Wilson
Summary: Individual variation in cognitive traits is necessary for natural selection and may result from complex interactions between genetic and environmental factors.
JOURNAL OF EVOLUTIONARY BIOLOGY
(2023)
Article
Biology
Krista van den Heuvel, John L. L. Quinn, Alexander Kotrschal, Kees van Oers
Summary: Cognitive flexibility, influenced by memory and prior experience, is a complex trait that controls how animals respond to changing environmental conditions. In a study on great tits (Parus major), researchers conducted an artificial selection experiment to assess the repeatability and heritability of cognitive flexibility. They found low repeatability but no genetic correlation between associative and reversal learning, highlighting the importance of prior information in the latter. The study also emphasized the need for future research to identify the cognitive components underlying variation in reversal learning and explore their genetic contributions.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Biology
Regina Vega-Trejo, Annika Boussard, Lotta Wallander, Elisa Estival, Severine D. Buechel, Alexander Kotrschal, Niclas Kolm
JOURNAL OF EXPERIMENTAL BIOLOGY
(2020)
