vintage omega watches 1970 audemars piguet royal oak chronograph blue dial price swiss replica watches womens watches on sale old rolex watches price list replica watches uk tag heuer xcaz2011 rolex daytona 6263 big red uk replica watches navitimer world tag heuer grand carrera calibre 17 watch price in india replica watches uk patek philippe vintage tank watch heuer trackmate 1 5 fake watches

SOLAMAC - Sociedade Latino Americana de Especialistas em Mamíferos Aquáticos

Biblioteca virtual  -  Artigos dos membros da SOLAMAC

Submerged swimming and resting metabolic rates in Southern sea lions
Dassis, M; Rodríguez, DH; Ieno, EN; Davis, RW; . Submerged swimming and resting metabolic rates in Southern sea lions. Journal of Experimental Marine Biology and Ecology. 432 (): 106-112. 2012.

We measured the metabolic rate of nineteen wild and three captive, trained Southern sea lions (Otaria flavescens, Shaw 1800) during three behavioral states: resting in air (V . O2 rest air), resting in water (V . O2 rest water) and submerged swimming (V . O2 subswim) using open flow respirometry. We then used these values to estimate total cost of transport (COT) and cost per stroke (CPS) during submerged swimming. Wild animals were placed in a metabolic chamber, and captive animals were trained to breathe under a plexiglass dome mounted at the end of a pool. General linear modeling was used to determine whether the incidence of each type of response variable (V . O2, CPS, COT, swim speed and stroke rate) could be associated with several explanatory variables (sex, age, animal identity, behavioral state, swimming distance and body mass). The overall mean V . O2 rest air was 6.8 ± 1.1 ml O2 min-1 kg-1 (n= 20 animals; 7 subadult males, 10 sub-adults females, 3 adults females), which was 2.1 times greater than the predicted basal metabolic rate (BMR) for terrestrial mammals of similar size, and neither body mass nor sex had a significant influence. The mean V . O2 rest air when only adults were considered (6.3 ± 0.3 ml O2 min-1 kg-1; n= 3 females) was similar to the overall value. The mean  ¬ V . O2 rest water (9.0 ± 0.8 ml O2 min-1 kg-1) and the mean V . O2 subswim (21.2 ± 7.4 ml O2 min-1 kg-1) estimated from repeated measurements in two adult females were 2.9 and 6.8 times greater than the predicted BMR, respectively. Both ¬ V . O2 rest water and V . O2 subswim were significantly greater (1.4 and 3.4 times respectively) than the mean V . O2 rest air estimated in this study, when only adults were compared. The mean COT was 0.14 ± 0.1 ml O2 kg-1 m-1 (2.6 ± 1.0 J kg-1 m-1), and the mean CPS was 0.38 ± 0.3 ml O2-1 kg-1 stroke-1; none of these values were significantly different among animals.

- Link:

- E-mail:

<< Voltar