Credit: Edmir Daniel Carvalho/CAUNESPIn São Paulo, Brazil, the Silver croaker, an invasive species, has actually become the predominant fish in the Jaguari reservoir and surrounding rivers, considerably lessening the diversity of native fish types. In no more than 10 years, P. squamosissimus has ended up being the most plentiful fish types in the reservoir.Research and Monitoring Efforts” Although this predator is commonly dispersed in hydroelectric dam reservoirs throughout Brazil, its potential impacts on native types had never ever been studied before. Types richness losses during the period analyzed were noted, along with replacement of numerous uncommon specialist species by a couple of generalists, and considerable distinctions were found in types composition and abundance in the local fish neighborhood, with entire evolutionary groups disappearing.Management ChallengesThere are no basic options to the problem. It replaces native species and now plays an extremely crucial social role in local economies,” Ramos said.Nevertheless, he proposed measures comparable to those taken in other nations to deal with invader types. One such measure would be to permit searching of this types throughout the year without size limits or a ban during the reproductive duration, with the aim of removing it or at least minimizing its abundance.However, federal and state laws restrict fishing not just of native species, which is quite right, but also of invasive types to some level.
Credit: Edmir Daniel Carvalho/CAUNESPIn São Paulo, Brazil, the Silver croaker, an intrusive species, has ended up being the predominant fish in the Jaguari tank and surrounding rivers, considerably lessening the diversity of native fish species. Species richness losses during the duration analyzed were noted, alongside alternative of numerous unusual professional species by a couple of generalists, and considerable differences were found in species structure and abundance in the local fish neighborhood, with whole evolutionary groups disappearing.Management ChallengesThere are no basic services to the problem. One such step would be to allow hunting of this types throughout the year without size limitations or a ban during the reproductive duration, with the objective of removing it or at least lowering its abundance.However, federal and state laws limit fishing not simply of native types, which is quite ideal, however likewise of intrusive types to some degree.
