TY - JOUR
T1 - The effects of swimming pattern on the energy use of gilthead seabream (Sparus aurata L.)
AU - Steinhausen, Maria Faldborg
AU - Steffensen, John Fleng
AU - Andersen, Niels Gerner
N1 - Keywords: seabream; Sparus aurata; oxygen consumption; swimming pattern; swimming cost ratio; optimum swimming speed
PY - 2010
Y1 - 2010
N2 - Oxygen consumption (MO2) was measured for gilthead seabream (Sparus aurata) during spontaneous and forced activities. During spontaneous activity, the swimming pattern was analysed for the effect on MO2 on the average speed (U), turning rate (Θ) and change in speed (δU). All swimming characteristics contributed significantly to the source of spontaneous swimming costs, and the models explained up to 58% of the variation in MO2. Prediction of MO2 of fish in field studies can thereby be improved if changes in speed and direction are determined in addition to swimming speed. A relationship between swimming speed and MO2 during forced activity was also established. During spontaneous activity, 2.5 times more energy was used than in forced swimming at a speed of 0.5 BLs-1. This indicates that spontaneous swimming costs may be considerably higher compared with those of a fixed swimming speed. However, comparing MO2 at the respective optimum swimming speeds with the lowest cost of transport (Uopt) resulted in similar values independent of swimming mode. This could be an important observation in estimating energetic costs of free-ranging fishes.
AB - Oxygen consumption (MO2) was measured for gilthead seabream (Sparus aurata) during spontaneous and forced activities. During spontaneous activity, the swimming pattern was analysed for the effect on MO2 on the average speed (U), turning rate (Θ) and change in speed (δU). All swimming characteristics contributed significantly to the source of spontaneous swimming costs, and the models explained up to 58% of the variation in MO2. Prediction of MO2 of fish in field studies can thereby be improved if changes in speed and direction are determined in addition to swimming speed. A relationship between swimming speed and MO2 during forced activity was also established. During spontaneous activity, 2.5 times more energy was used than in forced swimming at a speed of 0.5 BLs-1. This indicates that spontaneous swimming costs may be considerably higher compared with those of a fixed swimming speed. However, comparing MO2 at the respective optimum swimming speeds with the lowest cost of transport (Uopt) resulted in similar values independent of swimming mode. This could be an important observation in estimating energetic costs of free-ranging fishes.
U2 - 10.1080/10236244.2010.501135
DO - 10.1080/10236244.2010.501135
M3 - Journal article
SN - 1023-6244
VL - 43
SP - 227
EP - 241
JO - Marine and Freshwater Behaviour and Physiology
JF - Marine and Freshwater Behaviour and Physiology
IS - 4
ER -