Seaweed single cell detritus effects on the digestive enzymes activity and microbiota of the oyster Crassostrea gigas

Peña‐Rodríguez, Alberto; Gabriela, Morales-Alvarado; Elizondo‐González, Regina; Gabriela, Mendoza-Carrión; Tovar‐Ramírez, Dariel; Escobedo‐Fregoso, Cristina

doi:10.1007/s10811-020-02167-4

Cited by 5 publications

(1 citation statement)

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“…The types and activities of enzymes were different from those reported by Wang et al (2010), for example, the value of amylase activity was comparatively lower than in their studies. The difference in the type and level of digestive enzymatic activity may be due to differences in diet (Fernández-Reiriz et al, 2001;Labarta et al, 2002;Alberto et al, 2020). In the experiment, we found no cellulase activity in any of the test tubes.…”

Section: Discussionmentioning

confidence: 63%

Comparison in Growth, Feeding, and Metabolism Between a Fast-Growing Selective Strain and a Cultured Population of Pearl Oyster (Pinctada fucata martensii)

Zhang

et al. 2021

Front. Mar. Sci.

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Pearl oyster (Pinctada fucata martensii) is the main species cultured for marine pearls in the world. A breeding program was carried out for desirable production traits, including high growth rate, and a fast-growing selective strain of pearl oysters was established. In the current study, we compared the growth characteristics between a selective strain and a cultured population of P. f. martensii in Beihai, Guangxi Province, China. Large size (SL) and small size (SS) individuals of the selective strain were selected, and the differences of physiological and metabolic indexes, such as feeding, respiration, excretion, and enzyme activities between SL and SS and cultured population (CL), were also compared. The results showed that at the age of 6 months, pearl oysters of the selective strain were 14.61% larger than CL, and the proportion of SL (30–40 mm) was 59%, which was two times higher than CL (28%). SL with a rapid growth rate had a high clearance rate (CR), and the CR of SL was about 1.8 times higher than that of CL and 5 times higher than that of SS. In addition, the activities of digestive enzymes (amylase, pepsin, and lipase) and growth-related carbonic anhydrase enzymes in SL were higher than those in the other two groups (p < 0.05). SS with a slow growth rate had higher oxygen consumption (OCR) and ammonia excretion (AER) rates than SL and CL (p < 0.05). Our results suggest that the rapid growth of the selective strain P. f. martensii can be attributed to increased energy intake and reduced energy consumption.

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Section: Discussionmentioning

confidence: 63%