Abstract
Background. The Neretva nase, Chondrostoma knerii Heckel, 1843, is an endemic cyprinid species distributed in the Neretva River basin in Croatia and Bosnia and Herzegovina, designated in the EU Habitats Directive as a species requiring conservation within member states. According to the IUCN, the species is catalogued as vulnerable (VU). Available scientific data indicate that significant aspects of its biological and ecological characteristics, as well as conservation requirements, are scarce and largely composed of outdated records. This paper provides a summary of the main life history traits, particularly those related to the conservation challenges and a detailed list of the current state of knowledge. Materials and methods. This review was based on published literature in the form of research articles, monographs, books and technical reports, as well as unpublished data Results. All available data were organized, critically analysed and presented in a comprehensive form. Issues related to species conservation were highlighted with respect to the impact of development activities. The long-term monitoring data of reproduction activity in the Hutovo Blato wetland were presented, showing the lowering of spring inflow capacity as the major factors for spawning success. Conclusion. This review will, hopefully, serve as foundation and indicative example for future research aimed at better understanding the origin and status of this fish species in order to assure effective management and conservation programs.
Highlights
The Neretva nase, Chondrostoma knerii Heckel, 1843, is an endemic cyprinid species distributed in the Neretva River basin in Croatia and Bosnia and Herzegovina, designated in the EU Habitats Directive as a species requiring conservation within member states
That one of the important hotspots of hydroelectric and water supply reservoirs, pollution, as well the freshwater biodiversity in the Mediterranean covers the as the spreading of invasive species (Glamuzina et al 2013), Neretva River basin of Croatia and Bosnia and Herzegovina native species from this area require urgent conservation
The changing course of the Neretva River in the upper streams and the presence of invasive alien fish species have both been recognized as the main factors influencing species survival
Summary
The Neretva nase, Chondrostoma knerii Heckel, 1843, is an endemic cyprinid species distributed in the Neretva River basin in Croatia and Bosnia and Herzegovina, designated in the EU Habitats Directive as a species requiring conservation within member states. Available scientific data indicate that significant aspects of its biological and ecological characteristics, as well as conservation requirements, are scarce and largely composed of outdated records. This review was based on published literature in the form of research articles, monographs, books and technical reports, as well as unpublished data Results. All available data were organized, critically analysed and presented in a comprehensive form. Issues related to species conservation were highlighted with respect to the impact of development activities. The longterm monitoring data of reproduction activity in the Hutovo Blato wetland were presented, showing the lowering of spring inflow capacity as the major factors for spawning success. This review will, hopefully, serve as foundation and indicative example for future research aimed at better understanding the origin and status of this fish species in order to assure effective management and conservation programs
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