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  • Topic:Biodiversity
February 2025
Current Biology. - XX(2025)XX, XX-XX

New fish migrations into the Panama Canal increase likelihood of interoceanic invasions in the Americas

Gustavo A. Castellanos-Galindo; Diana M.T. Sharpe; D. Ross Robertson; Victor Bravo; Jonathan M. Jeschke; Mark E. Torchin

The authors have compared the fish communities of Lake Gatun in the Panama Canal before and after the canal’s expansion in 2016: Marine fish species  now make up 76 percent of the total biomass of the fish population and are primarily large predatory fishes. The lake’s food web is changing and local fisheries are impacted. There is also an increased risk of fishes colonizing the opposite ocean.

January 2025
Limnology and Oceanography. - XX(2025)XX, XX-XX

Ontogenetic shifts by juvenile fishes highlight the need for habitat heterogeneity and connectivity in river restoration

Twan Stoffers; Anthonie D. Buijse; Jan Jaap Poos; Johan A. J. Verreth; Leopold A. J. Nagelkerke

The authors analysed the habitat use of larval and juvenile fishes in the lower river Rhine. More than 60 per cent of the fish species switched between five different habitat types during their development, which should be available both in the river and connected floodplains. However, human intervention has drastically altered and homogenised the European river landscapes. 

January 2025
Nature. - 622(2025)X, XX-XX

One-quarter of freshwater fauna threatened with extinction

Catherine A. Sayer, Eresha Fernando, Randall R. Jimenez, Nicholas B. W. Macfarlane, Giovanni Rapacciuolo, Monika Böhm, Thomas M. Brooks, Topiltzin Contreras-MacBeath, Neil A. Cox, Ian Harrison, Michael Hoffmann, Richard Jenkins, Kevin G. Smith, Jean-Christophe Vié, John C. Abbott, David J. Allen, Gerald R. Allen, Violeta Barrios, Jean-Pierre Boudot, Savrina F. Carrizo, Patricia Charvet, Viola Clausnitzer, Leonardo Congiu, Keith A. Crandall, Neil Cumberlidge, Annabelle Cuttelod, James Dalton, Adam G. Daniels, Sammy De Grave, Geert De Knijf, Klaas-Douwe B. Dijkstra, Rory A. Dow, Jörg Freyhof, Nieves García, Joern Gessner, Abebe Getahun, Claudine Gibson, Matthew J. Gollock, Michael I. Grant, Alice E. R. Groom, Michael P. Hammer, Geoffrey A. Hammerson, Craig Hilton-Taylor, Laurel Hodgkinson, Robert A. Holland, Rima W. Jabado, Diego Juffe Bignoli, Vincent J. Kalkman, Bakhtiyor K. Karimov, Jens Kipping, Maurice Kottelat, Philippe A. Lalèyè, Helen K. Larson, Mark Lintermans, Federico Lozano, Arne Ludwig, Timothy J. Lyons, Laura Máiz-Tomé, Sanjay Molur, Heok Hee Ng, Catherine Numa, Amy F. Palmer-Newton, Charlotte Pike, Helen E. Pippard, Carla N. M. Polaz, Caroline M. Pollock, Rajeev Raghavan, Peter S. Rand, Tsilavina Ravelomanana, Roberto E. Reis, Cassandra L. Rigby, Janet A. Scott, Paul H. Skelton, Matthew R. Sloat, Jos Snoeks, Melanie L. J. Stiassny, Heok Hui Tan, Yoshinori Taniguchi, Eva B. Thorstad, Marcelo F. Tognelli, Armi G. Torres, Yan Torres, Denis Tweddle, Katsutoshi Watanabe, James R. S. Westrip, Emma G. E. Wright, E Zhang & William R. T. Darwall

The largest global assessment of freshwater animals on the IUCN Red List of Threatened Species to date has revealed that 24 per cent of the world’s freshwater fish, dragonfly, damselfly, crab, crayfish and shrimp species are at high risk of extinction.