Trials on Pacific oyster (Crassostrea gigas Thunberg) rearing in the middle Adriatic Sea by means of different trays

Abstract

The aim of this study was to compare the growth of juvenile Pacific oysters (mean weight 2.22 g; mean length 26.8 mm) reared with the suspended technique using three different types of trays fixed to long lines at a mussel farm located in the middle Adriatic Sea. Growth, mortality rate and quality traits of oysters cultured in a new type of tray (EXP) were compared to those of specimens reared in conventional trays (CON) and in ''poches'' (POC). Culture density was fixed at 0.03 oysters cm -2 in all the tray types. After 11 months of growth, oysters reared in all the tray types reached marketable size, weighing between 94.08 and 110 g without significant differences. Length (98.8-103.3 mm), width (61.1-70.5 mm) and height (31.6-34.1 mm) did not show significant variations. The condition index showed differences among EXP (93.17%) compared to CON (81%) and POC oysters (72.87%), and significant differences were found between those reared at the surface and the bottom, regardless of tray type. Concerning mortality, the EXP group (7.5%) recorded significantly smaller losses than CON (18.4%) trays and POC (31.6%).

Testing a Model of Pacific Oysters’ (Crassostrea gigas) Growth in the Adriatic Sea: Implications for Aquaculture Spatial Planning

“…This result is consistent with that presented in [53], who compared two grow-out cycles: the first one characterized by summer temperatures >25 • C, in which individual growth stopped, and a second one with temperatures lower than 22 • C, in which oysters continued growing throughout the summer. Nonetheless, our results are not entirely consistent with previous work on oyster growth in the Adriatic Sea, since [54] observed maximum weight increment between July and October. However, compared to the present study, temperatures were markedly lower (24.…”

Relación del crecimiento, condición y supervivencia del ostión del Pacífico Crassostrea gigas y las variables ambientales, cultivado en suspensión en el sistema lagunar Navachiste-Macapule, Sinaloa, México

“…También, Korringa (1976) menciona que el crecimiento del ostión está influenciado por las características del medio ambiente en combinación con el tipo y disponibilidad de alimento, factores que están fuertemente ligados a la latitud que se encuentre el sitio de cultivo (Roncarati et al 2010). En las costas de Canadá y en el Mar del Norte donde se practica el cultivo intermareal, la tasa de crecimiento de los ostiones es de aproximadamente 5 cm por año, a pesar de la alta productividad primaria existente en esos lugares, mientras que en las costas del noroeste de México, lugar que en comparación presenta menor productividad, los animales pueden alcanzar una tasa de crecimiento de 18,5 cm anuales (Mazón-Suástegui 1996).…”

Crassostrea gigas (Thunberg 1793) cultivation in southern Adriatic Sea (Italy): A one‐year monitoring study of the oyster health

“…Oyster production is currently limited to small‐scale farming despite the rise of national consumer demand. According to several field and modelling studies (Brigolin et al, 2017; Roncarati et al, 2010), the trophic level and temperature of the Adriatic sea are suitable for growing Pacific oyster (Tamburini et al, 2019), although the region is characterized by oligotrophic condition (Cerino et al, 2012) and by temperatures close to the critical upper thermal limit of the species (Bougrier et al, 1995; Pastor et al, 2018).…”