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The conservation of semen may have its costs reduced when used within a certain period of time through cooling techniques. These techniques are alternatives to reproductive management in fish farms, optimizing fertilization of oocytes and ensuring satisfactory reproduction. The quality of the extenders is essential, since it guarantees the maintenance of sperm cells. The tambaqui (Colossoma macropomum)...
Pacu (Piaractus mesopotamicus) is an important fish species for professional and sport fisheries in the Alto-Paraguay Basin, located in the central western Brazil. In this study the D-loop control region of mtDNA sequence data was used to investigate genetic variability within and among populations of pacu. A total of 99 individuals were collected in the Paraguay River and in four other main tributaries...
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