文摘

To investigate the effect of temperature on the repeat constant acceleration swimming performance and on the metabolic recovery capacity in juvenile qingbo (Spinibarbus sinensis), their constant acceleration test speed (U CAT) and excess post-exercise oxygen consumption (EPOC) recovery process were measured twice with 1-h intervals at different acclimation temperatures (10, 15, 20, 25 and 30?°C). Temperature significantly affected U CAT, the pre-exercise metabolic rate (MO2), metabolic peak values (MO2peak), the metabolic scope (MS, MO2peak—pre-exercise MO2) and the magnitude of the EPOC (P?U CAT and EPOC magnitude) or did not change (MO2peak and MS) when the temperature increased from 25 to 30?°C in the first test (P?T) and these parameters (U CAT, MO2peak, MS and EPOC magnitude) in the first test were as follows: U CAT?=?62.14/{1?+?[(T???5.1)/21.1]2} (r?=?0.847, P?n?=?40); MO2peak?=?1,052.11/{1?+?[(T???9.2)/18.9]2} (r?=?0.901, P?n?=?39); MS?=?753.74/{1?+?[(T???7.1)/18.6]2} (r?=?0.768, P?n?=?39); and EPOC?=?195.42/{1?+?[(T???5.6)/8.7]2} (r?=?0.752, P?n?=?39). The optimal temperatures for U CAT, MO2peak, MS and EPOC magnitude in juvenile qingbo were 25.1, 29.2, 27.1 and 28.6?°C, respectively. Repeat exercise had different effect on U CAT and EPOC magnitude at different temperature (interaction effect, P?U CAT and in EPOC magnitude between the first and second tests at low temperatures (10-0?°C). However, both U CAT and EPOC magnitude decreased significantly during the second test compared with the first test at high temperatures (25 and 30?°C) (P?