Effects of three light intensities on the survival, growth performance and biochemical composition of two size giant clams Tridacna crocea in the Southern China Sea

Liu, Chunsheng; Li, Xiubao; Wu, Chuanliang; Wang, Aiming; Gu, Zhenxin

doi:10.1016/j.aquaculture.2020.735548

Cited by 12 publications

(8 citation statements)

References 42 publications

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“…The growth rate of bivalve species shows a decreasing tendency with their increased size, which is attributed to their energy budget changes at different life stages (Ibarrola et al, 2017;Hao et al, 2018;Liu et al, 2020). In our study, both the GH and the RGR of large-size P. f. martensii and P. maxima fed with the same microalgae significantly decreased than small-size groups.…”

Section: Discussionmentioning

confidence: 48%

Comparative Effects of Microalgal Species on Growth, Feeding, and Metabolism of Pearl Oysters, Pinctada fucata martensii and Pinctada maxima

Zhang

et al. 2022

Front. Mar. Sci.

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Pinctada fucata martensii and P. maxima are two main traditional pearl oyster species that can produce seawater pearls. Our previous study showed a higher clearance rate (CR) and growth performance in P. f. martensii than in P. maxima fed with Isochrysis galbana. In this study, the P. f. martensii and P. maxima juveniles of two sizes (large and small) were fed with six different microalgae diets [I. galbana (I), Platymonas subcordiformis (P), Chaetoceros muelleri I, I+P, I+C, and P+C] to evaluate the differences in growth, feeding, and metabolism between two pearl oyster species. After 60 d of the rearing period, P. f. martensii and P. maxima fed with mixed microalgae showed a significantly higher relative growth rate (RGR) than those fed with single microalgae (P< 0.05). The RGRs were significantly higher in P. f. martensii than those in P. maxima fed with the same diets (P< 0.05). The RGRs showed a decreasing tendency with the growth in both pearl oyster species. The CRs of pearl oysters fed with mixed microalgae were significantly higher than those fed with single microalgae (P< 0.05), and the CRs of P. f. martensii were significantly higher than those of P. maxima fed with the same diets (P< 0.05). Significantly lower respiration rates (RRs) were observed in small-size P. f. martensii groups fed with I, P, and I+P diets and all large P. f. martensii groups compared to P. maxima fed with the same diets (P< 0.05). Higher activities of amylase, cellulase, lipase, and pepsin in P. f. martensiiwere observed compared to P. maxima fed with the same diets at two sizes. The pepsin activities in P. maxima decreased with the growth, while there were no consistent pepsin activities of P. f. martensii with the growth. The carbonic anhydrase activities in P. maxima were significantly higher than those in P. f. martensii fed with the same diets (P< 0.05). The carbonic anhydrase activities were highest in the I+C diet group, followed by C+P and I+P, I, C, and P groups. Significant differences were observed among different diet groups in the same pearl oyster species (P< 0.05). Our results suggest that the lower CR and activities of digestive enzymes and higher RRs and activities of carbonic anhydrase may cause a lower growth rate of P. maxima compared to P. f. martensii.

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Section: Discussionmentioning

confidence: 48%

Comparative Effects of Microalgal Species on Growth, Feeding, and Metabolism of Pearl Oysters, Pinctada fucata martensii and Pinctada maxima

Zhang

et al. 2022

Front. Mar. Sci.

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“…The crude protein content was determined by using a fully automatic Kjeldahl analyzer (FOSS-Soxtec 2050, Sweden). Crude fat was extracted through a Soxhlet extractor, according to previous reports [ 49 ]. Glycogen content was determined by using a glycogen content kit (Jiancheng Biological Engineering Institute, Nanjing, China).…”

Section: Methodsmentioning

confidence: 99%

High Hydrostatic Pressure Treatment of Oysters (Crassostrea gigas)—Impact on Physicochemical Properties, Texture Parameters, and Volatile Flavor Compounds

Wang

Zhang

et al. 2021

Molecules

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High hydrostatic pressure (HHP) treatment is a non-thermal processing technology, which is widely used in the food processing field at present. In this study, the effects of HHP treatment (100~500 MPa for 5 min) on the physicochemical properties, texture parameters, and volatile flavor compounds of oysters were investigated. The results showed that HHP treatment increased the water content while reducing the crude protein and ash content of the oyster. Texture parameters showed that HHP treatment improved the hardness, springiness, chewiness, and cohesiveness of oysters, compared with the control group. In addition, the saturated fatty acid (SFA) content was slightly increased after HHP treatment, while the difference in monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) content was not significant. Furthermore, HHP increased hexenoic aldehyde, 2,4-heptadienal, 1-octene-3-ol, and 2-octen-1-ol and decreased the contents of 3. 6-nadien-1-ol, 3-octanone, and 2-undecanone, suggesting that HHP might inhibit the fishiness of oyster and showed a positive effect on its flavor. Based on the above results, HHP improved the edible qualities such as texture properties and volatile flavor of oysters. This meets the requirements of consumers on the edible quality of seafood and provides new ideas for the development of seafood.

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“…At each sampling time, three pieces of the mantle of each giant clam were randomly collected using 5mm-diameter biopsy puncher. The isolation and zooxanthella counts were performed using the method described by Liu et al (2020). In detail, the sampled mantles were cut into smaller pieces, and homogenized with 1 mL of sterilized PBS at 1,200 rpm for 5 min.…”

Section: Analysis Of Chlorophyll Uorescence and Symbiotic Zooxanthell...mentioning

confidence: 99%

“…It has been reported that the proportion of nutrition derived from symbiotic zooxanthellae in some shallow-water-distribution species (such as Tridacna gigas and T. crocea) is more than 50% (Klumpp et al 1992;Liu et al 2017). Therefore, light is one of the most important ecological factors affecting the survival and distribution of the giant clam-zooxanthellae symbiosis (Liu et al 2020). Giant clam-zooxanthellae symbiosis displays many light-dependent phenomena that are distinctively different from other non-photosymbiotic bivalve mollusks.…”

Section: Introductionmentioning

confidence: 99%

Effects of the daily light-dark cycle on rhythms of behavior and physiology in boring giant clam Tridacna crocea

Li,

Yang,

Hong

et al. 2024

Preprint

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Giant clams obtain their nutrition from both filter-feeding and photosynthates produced by symbiotic zooxanthellae within their mantle tissue. The symbiotic partnerships between giant clam and zooxanthellae are critical for the health and survival of giant clams. Therefore, light/dark alternation plays a crucial role in influencing the growth performance and physiological change of the giant clam-zooxanthellae symbiosis in natural ecosystems. In this study, the rhythms of mantle area, physiological metabolic activity, and oxidative stress in the boring giant clam, Tridacna crocea, caused by 12-hour light-dark cycles (7:00–19:00 light-on and 9:00–21:00 light-on, respectively) were investigated. The relative mantle area, net calcification rate and gross primary production significantly increased with the increase in light time, and the highest values were observed after 4–7 h of light exposure. The values of symbiosis Y (II) sharply increased when giant clams were transferred from dark to light conditions, and then slightly decreased to a low level until the next light/dark cycle. Dynamic changes of zooxanthellae density in the outer mantle were observed with two-peck values noted at 4-h after light-on and -off, respectively. The absorption of ammonium-nitrogen (negative values of ammonia metabolic rate) was observed when giant clams were exposed to light, and the rate reached its highest value after 10 h of light exposure. Rhythmic changes of oxidative stress related enzymes and antioxidant molecule were also detected in the inner and outer mantles. In detail, the highest values of SOD activity were observed around light-on time in both inner and outer mantles, while the tendency of CAT activity was not the same in inner and outer mantles; the GSH contents in inner mantle were significantly higher than that in outer mantle, and their values significantly increased with light exposure; the MDA concentrations from 5:00 to 14:00 were almost the same in both inner and outer mantles, which showed significantly higher than those of other sampling point. The rhythms of these detected behaviors and physiological responses were almost delayed with the delay of photocycle. This provides experimental support for the hypothesis that some behaviors and physiological responses of giant clams exhibit circadian rhythms, which are affected by change of light/dark alternation.

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Effects of three light intensities on the survival, growth performance and biochemical composition of two size giant clams Tridacna crocea in the Southern China Sea

Cited by 12 publications

References 42 publications

Comparative Effects of Microalgal Species on Growth, Feeding, and Metabolism of Pearl Oysters, Pinctada fucata martensii and Pinctada maxima

Comparative Effects of Microalgal Species on Growth, Feeding, and Metabolism of Pearl Oysters, Pinctada fucata martensii and Pinctada maxima

High Hydrostatic Pressure Treatment of Oysters (Crassostrea gigas)—Impact on Physicochemical Properties, Texture Parameters, and Volatile Flavor Compounds

Effects of the daily light-dark cycle on rhythms of behavior and physiology in boring giant clam Tridacna crocea

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