scholarly journals Global biogeographical regions of freshwater fish species

2019 ◽  
Vol 46 (11) ◽  
pp. 2407-2419 ◽  
Author(s):  
Boris Leroy ◽  
Murilo S. Dias ◽  
Emilien Giraud ◽  
Bernard Hugueny ◽  
Céline Jézéquel ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Freshwater Fish Species ◽  
Biogeographical Regions

scholarly journals Global biogeographical regions of freshwater fish species

2018 ◽  
Author(s):  
Boris Leroy ◽  
Murilo S. Dias ◽  
Emilien Giraud ◽  
Bernard Hugueny ◽  
Céline Jézéquel ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Clustering Algorithm ◽  
Fish Fauna ◽  
Freshwater Species ◽  
Global Database ◽  
Transition Zones ◽  
Freshwater Fish Species ◽  
Multiple Regions ◽  
Biogeographical Regions

AbstractAimTo define the major biogeographical regions and transition zones for freshwater fish species.TaxonStrictly freshwater species of actinopterygian fish (i.e., excluding marine and amphidromous fish families).MethodsWe based our bioregionalisation on a global database of freshwater fish species occurrences in drainage basins, which, after filtering, includes 11 295 species in 2 581 basins. On the basis of this dataset, we generated a bipartite (basin-species) network upon which we applied a hierarchical clustering algorithm (the Map Equation) to detect regions. We tested the robustness of regions with a sensitivity analysis. We identified transition zones between major regions with the participation coefficient, indicating the degree to which a basin has species from multiple regions.ResultsOur bioregionalisation scheme showed two major supercontinental regions (Old World and New World, 50% species of the world and 99.96% endemics each). Nested within these two supercontinental regions lie six major regions (Nearctic, Neotropical, Palearctic, Ethiopian, Sino-Oriental and Australian) with extremely high degrees of endemism (above 96% except for the Palearctic). Transition zones between regions were of limited extent compared to other groups of organisms. We identified numerous subregions with high diversity and endemism in tropical areas (e.g. Neotropical), and a few large subregions with low diversity and endemism at high latitudes (e.g. Palearctic).Main conclusionsOur results suggest that regions of freshwater fish species were shaped by events of vicariance and geodispersal which were similar to other groups, but with freshwater-specific processes of isolation that led to extremely high degrees of endemism (far exceeding endemism rates of other continental vertebrates), specific boundary locations, and limited extents of transition zones. The identified bioregions and transition zones of freshwater fish species reflect the strong isolation of freshwater fish faunas for the past 10 to 20 million years. The extremely high endemism and diversity of freshwater fish fauna raises many questions about the biogeographical consequences of current introductions and extinctions.

scholarly journals Forecasting the future establishment of invasive alien freshwater fish species

2021 ◽  
Author(s):  
Sam Wenaas Perrin ◽  
Kim Magnus Bærum ◽  
Ingeborg Palm Helland ◽  
Anders Gravbrøt Finstad
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Freshwater Fish Species ◽  
The Future

Major threats to European freshwater fish species

2021 ◽  
pp. 149105
Author(s):  
Maria João Costa ◽  
Gonçalo Duarte ◽  
Pedro Segurado ◽  
Paulo Branco
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Freshwater Fish Species

Performance of a pool-and-weir fish pass for small bottom-dwelling freshwater fish species in a regulated lowland river

2007 ◽  
Vol 57 (4) ◽  
pp. 423-432 ◽  
Author(s):  
Evelien Maerten ◽  
Marcel Eens ◽  
Guy Knaepkens
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Fish Assemblages ◽  
Regulated River ◽  
Lowland River ◽  
Stone Loach ◽  
Spined Loach ◽  
Freshwater Fish Species ◽  
Cottus Gobio ◽  
Fish Pass

AbstractAlthough small benthic freshwater fish species are an important biological component of fish assemblages and free instream movement is indispensable for their survival, they are often neglected in fish pass performance studies. In this study, a capture-mark-recapture approach was used to assess whether small bottom-dwelling species, including gudgeon (Gobio gobio), stone loach (Barbatula barbatula), spined loach (Cobitis taenia) and bullhead (Cottus gobio), were able to cross a pool-and-weir fish pass in a regulated lowland river. Some tagged individuals of stone loach (18%), gudgeon (7%) and spined loach (2%) managed to successfully ascend the fish pass under study, despite the fact that water velocity levels in the different overflows of the facility (between 0.55-1.22 m/s) exceeded the critical swimming speed of all three species. Although this suggests that a pool-and-weir fish pass is a able to facilitate upstream movement of some small benthic species in a regulated river, more detailed research incorporating advanced tagging and retrieving techniques is necessary.

Length‐weight relationships of three freshwater fish species from the Nandu River and Changhua River in Hainan Island, China

2018 ◽  
Vol 35 (2) ◽  
pp. 580-581 ◽  
Author(s):  
Xingwei Cai ◽  
Gaojun Li ◽  
Fangyuan Li ◽  
Haigui Wang ◽  
Ya Zhang ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Hainan Island ◽  
Freshwater Fish Species
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