Response of cold-acclimated, farmed South African abalone (Haliotis midae) to short-term and long-term changes in temperature

Metabolic readjustment in juvenile South African abalone (Haliotis midae) acclimated to combinations of temperature and dissolved oxygen levels

“…We previously confirmed that winter-acclimated (16 1C), adult H. midae were able to acclimate to 19 1C after long-term exposure (Vosloo and Vosloo, 2010). In addition, we demonstrated that winter-acclimated juvenile H. midae were less susceptible to longterm re-acclimation to low and high oxygen levels at 16 1C compared with adults (Vosloo et al, 2013).…”

“…In this, as in previous studies (Vosloo et al, 2012(Vosloo et al, , 2013Vosloo and Vosloo, 2010), we attempt to link organismal responses across different levels of organisation. If organismal function is negatively affected, an understanding of processes at lower organisational levels will aid in identifying where the potential adaptive limitations are.…”

“…The atomic equivalents of oxygen consumed and nitrogen excreted was used to calculate the O:N ratio to determine the relative importance of protein as metabolic fuel (Bayne et al, 1985). Only average oxygen consumption rate and nitrogen excretion rate data were used to calculate O:N ratio, as described in Vosloo and Vosloo (2010). Oxygen consumption rate, nitrogen excretion rate and O:N ratio data for 16 1C, 82%, 98% and 126% oxygen saturation reported in Vosloo et al (2013) for juvenile abalone are provided in the results section of this paper for comparison to data from 14 1C and 19 1C treatments.…”

“…reported an optimum temperature range of 12-20 1C for juvenile H. midae. Within their distribution range, ambient seawater temperatures are relatively stable during winter and fluctuates much more during summer months (Vosloo and Vosloo, 2010). Based on a growth trial, found the condition factor of animals at 20 1C to be significantly lower than at 18 1C, despite maintaining an increase in shell length between these two temperatures.…”

Acclimation-dependent expression of heat shock protein 70 in Pacific abalone (Haliotis discus hannai Ino) and its acute response to thermal exposure

“…A African abalones, Haliotis midae. The Hsp70 content in the muscles of the abalones cultured at 22°C for one month was dramatically increased than that of the control group maintained at 16°C (Vosloo and Vosloo, 2010). Substantial growth when cultured at 30°C suggested that the abalones well adapted to this extreme temperature.…”