Effects of temperature on development and mortality of Atlantic mackerel fish eggs

Mortality of mackerel (Scomber scombrus L.) after pursing and slipping from a purse seine

“…This variation was not intentional, but was a result of the windy conditions during the experiment period, which prevented termination at predetermined times. The temperature in the upper water layers, where the mackerel schools were swimming before being caught and where the fish were stored during the observation phase, varied between 14.9 and 15.8 • C, which is in the upper range of the thermal preference for mackerel (Mendiola et al, 2006). Since the fish were stored at the same depth interval as their natural swimming depth, temperature is not expected to have had any detrimental effect on survival.…”

High variability in the Daily Egg Production Method parameters of an eastern Mediterranean anchovy stock: Influence of environmental factors, fish condition and population density

“…The assumption of common mortality is reasonable in terms of expected predation rates on eggs and yolk sac larvae (Hunter and Lo, 1997). However, in recent years, there have been many concerns on whether a simple exponential decay model is suitable to describe daily mortality given that different developmental stages might have different mortality rates (as evidenced from laboratory experiments) and the spatial variability in vital rates is ignored (Bunn et al, 2000;Dickey-Collas et al, 2003;Mendiola et al, 2006;Stratoudakis et al, 2006). Changes of daily mortality with developmental stage and features of the embryonic habitat still need to be better understood.…”

Egg development rates for use in egg production methods (EPMs) and beyond

“…predation) are in stage II or at hatching (see Bonnet, 1939;Forrester, 1964;Bunn et al, 2000). In mackerel, mortality rates tended to be elevated between stages III and the start of hatching (Mendiola et al, 2006). In addition overall mortality was highest at the highest and lowest incubation temperatures (i.e.…”