| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000409064 |
| ISSN: | 0001-3765 |
| Authors: | Aguilar, Freddy A.A1 Cruz, Thaline M.P. da1 Mourao, Gerson B1 Cyrino, Jose Eurico P1 |
| Institutions: | 1Universidade de Sao Paulo, Escola Superior de Agricultura "Luiz de Queiroz", Piracicaba, Sao Paulo. Brasil |
| Year: | 2017 |
| Season: | Jun |
| Volumen: | 89 |
| Number: | 2 |
| Pages: | 1305-1312 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Knowledge on fasting heat production (HEf) of fish is key to develop bioenergetics models thus improving feeding management of farmed species. The core of knowledge on HEf of farmed, neotropical fish is scarce. This study assessed the effect of body mass and water temperature on standard metabolism and fasting heat production of pacu, Piaractus mesopotamicus, an omnivore, Neotropical fresh water characin important for farming and fisheries industries all through South American continent. An automated, intermittent flow respirometry system was used to measure standard metabolic rate (SMR) of pacu (17 - 1,050 g) at five water temperatures: 19, 23, 26, 29 and 33 °C. Mass specific SMR increased with increasing water temperature but decreased as function of body mass. The allometric exponent for scaling HEf was 0.788, and lied in the range recorded for all studied warm-water fish. The recorded van't Hoff factor (Q10) for pacu (2.06) shows the species low response to temperature increases. The model HEf = 0.04643×W0.7882×T1.837 allows to predict HEf (kJ d-1) from body mass (W, kg) and water temperature (T, °C), and can be used in bioenergetical models for the species |
| Disciplines: | Medicina veterinaria y zootecnia |
| Keyword: | Nutrición animal, Zootecnia, Peces, Cultivo de peces, Respirometría, Tasa metabólica, Bioenergética, Ayuno, Masa corporal, Piaractus mesopotamicus |
| Keyword: | Veterinary medicine and animal husbandry, Animal husbandry, Animal nutrition, Fish, Fish culture, Bioenergetics, Respirometry, Metabolic rate, Fasting, Body mass, Piaractus mesopotamicus |
| Full text: | Texto completo (Ver HTML) |
