Juvenile Atlantic sea scallop, Placopecten magellanicus, energetic response to increased carbon dioxide and temperature changes

This study assessed the energy budget for juvenile Atlantic Sea Scallop, Placopecten magellanicus , during a natural drop in temperature (15.6°C to 5.8°C) over an 8-week time period fall at three different enrichment levels of carbon dioxide (CO 2 ). Every weeks, individuals were sampled ecophysiological measurements feeding activity, respiration rate (RR) and excretion (ER) enable calculation scope growth (SFG) atomic oxygen:nitrogen ratios (O:N). In addition, 36 per treatment removed shell height, dry tissue weight (DTW) (DSW). We found significant decrease rates as CO increased. Those also significantly affected by temperature, with highest 9.4°C. No effect was observed catabolic processes (RR ER); however, these did increase temperature. The O:N ratio not but There interaction between ER ratio, low resulting U-shaped response that sustained suggests independent effects are once threshold is reached. Additionally, there differences estimators (shell height DSW), best occurring lowest level. contrast variations induced trade-off acquisition expenditure, results from this research support hypothesis sea scallops have limited ability alter physiological compensate increasing .