Effect of emerged shipment on the physiological condition of the adductor muscle in adult giant lion's paw scallop Nodipecten subnodosus (Sowerby 1835)

Abstract

Currently, there is an increasing interest in shipping live adult scallops to markets and broodstock to hatcheries; nevertheless, information about the shipping e¡ect on live scallops physiology is very scarce. In a previous study, a method in emersion was developed to ship scallop seed out of water, but it was not known whether this method is useful to transport adult organisms. As a consequence, the purpose of this study was to evaluate the e¡ects of transportation by the emersion method on the physiological status of the adductor muscle of adult giant lion's paw scallop. Live specimens were packaged in a container and transported in emersion for 11h. Six scallops were frozen in a farm and a similar number were frozen as soon as they arrived to the laboratory. Physiological indices were determined in each lot and the survival was estimated 24 h after re-immersion. As a result of the transportation, a signi¢cant loss (Po0.05) of total carbohydrates, glycogen, adenosine 5 0 -triphosphate and adenilated energetic charge, and a signi¢cant increase (Po0.05) in the free amino acids concentration were observed. Eighty-eight per cent survival was achieved; therefore, we conclude that this method is appropriate for shipping live adult scallops of Nodipecten subnodosus.

A Comparative Study on Low and High Salinity Tolerance of Two Strains of Pinctada fucata

“…Evidence has suggested that such massive mortality is often associated with environmental changes (Zhang et al, 2015;Chen et al, 2016). Studies have shown that under the influence of salinity, temperature, pH and dissolved oxygen, physiological indicators, such as osmotic pressure, cellular immunity level, oxygen consumption and ammonia excretion, can be altered, resulting in physiological metabolism imbalance, growth inhibition and even death (Ghiselli et al, 2000;Nan et al, 2004;Liu and Yan, 2006;Ocaño-Higuera et al, 2011).…”

The combined effects of temperature and salinity on the digestion and respiration metabolism of Pinctada fucata

“…A series of research have been conducted, followed by evidence that environmental changes, such as salinity, pH, dissolved oxygen, temperature and so on, are often associated with such mortalities [28][29][30][31] . Physiologically, aquatic organisms are affected by changes in ammonia excretion rate, osmotic pressure, cellular immune level and oxygen consumption rate and so on, resulting in disturbance of basal metabolic balance, inhibition of growth and death in severe cases 28,29,[32][33][34] . Before large-scale farming of P. fucata, it is critical to identify the optimal conditions for such farms.…”