Abstract
In this study we verified data of water temperatures collected by CORSAN-RS from 1996 to 2004 in several cities of the state of Rio Grande do Sul, southern Brazil, and analyzed the possibility of raising the most cultivated fish species in Brazil. The water temperature from 1996 to 2004 was 16 to 28ºC in summer, 17 to 23ºC in fall, 14 to 17ºC (down to 9ºC in the coldest months) in winter and 14 to 21ºC in spring. Native species of this state, such as silver catfish (Rhamdia quelen), traíra (Hoplias malabaricus), dorado (Salminus brasiliensis), pintado (Pimelodus maculatus), as well as carps (family Cyprinidae), are resistant to the low winter temperatures. These species have a lower growth rate in coldest months (winter/spring) but a good development in warmer months (summer/fall), reaching a satisfactory performance throughout the year. In the periods of more intense cold, mortality of some introduced species, such as surubim from Amazon Basin (Pseudoplatystoma sp.), pirapitinga (Piaractus brachypomus), pirarucu (Arapaimas gigas), pacu (Piaractus mesopotamicus), tambaqui (Colossoma macropomum) and Nile tilapia (Oreochromis niloticus) may occur. In addition, as most tropical species have a thermal range for growth and reproduction between 20 to 28ºC, some species may have poor development even in fall. Therefore, water temperature in this state should be considered in the choice of fish species to be cultivated.
Highlights
The culture of freshwater fish in Brazil was continuously increasing up to 2001, but during 2002-2004 there was almost no increase in production
This parameter can interfere with fish growth and feeding rate (Laevastu & Hayes, 1984), and significant changes in water temperature may cause a serious challenge to the maintenance of physi
The objective of this study was to analyze the mean freshwater temperatures from 1996 to 2004 in the state of Rio Grande do Sul, southern Brazil, collected by a state agency, and to relate it to the culture of fish species in Brazil proposed for cultivation
Summary
The culture of freshwater fish in Brazil was continuously increasing up to 2001, but during 2002-2004 there was almost no increase in production. With their body temperatures being determined by water temperature (Hazel, 1993). Freshwater temperature and implication for fish culture ological function (Hazel, 1993). Different fish species possess different ranges of temperature preference (Baldisserotto, 2002). To improve productivity or identify which species should be cultivated in a certain environment it is important to know the water temperature range in the area. The objective of this study was to analyze the mean freshwater temperatures from 1996 to 2004 in the state of Rio Grande do Sul, southern Brazil, collected by a state agency, and to relate it to the culture of fish species in Brazil proposed for cultivation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
