Does the wild-caught Chinese mitten crab megalopae perform better than the hatchery-produced seed during the juvenile culture?

Wu, Xugan; Jiang, Xiaodong; Liu, Qing; Gao, Feng; Cheng, Yongxu

doi:10.1111/are.13661

Cited by 15 publications

(6 citation statements)

References 13 publications

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“…Previous studies suggested lower productivity among the hatchery-produced crabs than their wild counterparts, fish and various invertebrate species ( Bannister et al., 1994 ; Malavasi et al., 2008 ; Swain and Riddell, 1990 ). Besides, it had also been suggested that the hatchery-reared crablets could exhibit comparable or better performance than wild-sourced crablets ( del Mar Gil et al., 2019 ; Ut et al., 2007 ; Wu et al., 2018 ). Nonetheless, the performance of the hatchery-reared crablets might vary depending on the production batch due to the interaction between genetic makeup and environmental factors ( Tweedley et al., 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs

Sarower

Mahmud-Al-Hasan

Rahman

et al. 2021

Heliyon

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This paper reports the comparative growth, nutritional performance, and morphometric variation between wild and hatchery-reared juvenile mud crabs (Scylla olivacea) in earthen ponds. The crabs were fed daily with boiled tilapia paste at a feeding rate of 5-8% body weight for the first two weeks, followed by feeding with chopped eviscerated tilapia until termination of the experiment. Selected phenotypic trains, including carapace width (CW), carapace length (CL) and abdominal width (AW), were measured weekly. The protein content of the muscle (21.13%), gill (13.51%) and egg (43.28%) were significantly higher in the hatchery-sourced compared to wild female crabs (muscle ¼ 19.15%; gill ¼ 10.09%; egg ¼ 38.15%). Likewise, the hatchery sourced crabs exhibited higher lipid content in the muscle (2.45-2.51%) and eggs (7.51%) compared to the wild counterparts (muscle ¼ 1.45-1.47%; egg ¼ 6.15%). These findings suggested a superior nutritional quality of the hatchery-reared compared to the wild-sourced crabs. Although some selected phenotypic traits did not vary among the wild and hatchery-reared crabs (p < 0.05), their survival rates varied significantly depending on the stocking density (p < 0.05). Overall, the findings suggest that the growth characteristics of the hatchery produced and wild-sourced crab were similar, which will help to remove the misconception among the crab farmers about the hatchery seeds and promote diversification of the crab production system for long-term sustainability.

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Section: Discussionmentioning

confidence: 99%

Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs

Sarower

Mahmud-Al-Hasan

Rahman

et al. 2021

Heliyon

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“…The initial body weight of experimental crabs was set within the range of 70 g to 90 g, which is the typical weight of adult female crabs that have recently completed puberty moulting. The maturation of adult crabs was determined based on their secondary sex characteristics as descript by Wu et al [42]. After 5 days of domestication in the tank, lively and whole crabs were selected for subsequent culture.…”

Section: Diet Formulation and Preparation As Shown In Tablementioning

confidence: 99%

Dietary DHA Oil Supplementation Promotes Ovarian Development and Astaxanthin Deposition during the Ovarian Maturation of Chinese Mitten Crab Eriocheir sinensis

Jiang

Pan

Yang

et al. 2022

Aquaculture Nutrition

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Astaxanthin (Axn) is an essential carotenoid for crustacean pigmentation, and docosahexaenoic acid (DHA) is an important fatty acid; both play key roles in maintaining the health of many aquaculture species. The present study explored the combined effect of dietary Axn and DHA on gonadal development and carotenoid deposition in adult females of the Chinese mitten crab, Eriocheir sinensis. A 2 × 3 factorial design of experimental diets was created to contain two levels of Axn (0 mg/kg and 100 mg/kg) and three levels of DHA oil (0%, 0.33%, and 0.67%). The results showed as follows: (1) For the culture performance, dietary DHA oil significantly increased the gonadosomatic index (GSI), and Diet 2 (Axn 0% + DHA oil 0.33%) had the highest GSI among all treatments. (2) For the enzymatic indicators in the hepatopancreas and hemolymph, supplementation with 0.33% DHA oil significantly improved the antioxidant capacity (T-AOC and MDA), immunity (AKP and ACP), and health status (e.g., GPT and GOT) of E. sinensis. (3) Supplementation with 100 mg/kg Axn significantly increased redness (a ∗ ) and Axn concentration in both the ovaries and hepatopancreas, and supplementation with 0.33% or 0.67% DHA oil produced a further significant improvement in Axn concentration when the diets were supplemented with 100 mg/kg of Axn. (4) As for proximate composition, dietary Axn and DHA significantly increased the deposition of total lipids and triacylglycerol in the hepatopancreas. As expected, the crabs fed diets with DHA supplementation showed an increase in the DHA percentage and DHA/EPA ratio in the ovaries and hepatopancreas. In conclusion, dietary Axn and DHA oil had positive effects on ovarian development in E. sinensis females. The optimal combination of dietary Axn and DHA oil was determined to be approximately 100 mg/kg and 0.33%, respectively, for this species during ovarian maturation.

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“…Annual aquaculture production of E . sinensis in China increased from 8000 t in 1991 to approximately 775,900 t in 2020, with further increases anticipated in the future (Bureau of Fisheries & Management, 2020; Wu et al, 2018). When maintained in earthen ponds in the Yangtze River basin, E .…”

Section: Introductionmentioning

confidence: 99%

“…Given its delicate flavour and high nutritional value, as well as advances in hatchery and grow-out techniques, the aquaculture of E. sinensis has undergone a rapid expansion during the past few decades (Cheng et al, 2008). Annual aquaculture production of E. sinensis in China increased from 8000 t in 1991 to approximately 775,900 t in 2020, with further increases anticipated in the future (Bureau of Fisheries & Management, 2020;Wu et al, 2018). When maintained in earthen ponds in the Yangtze River basin, E. sinensis attains physiological maturity in early October and these crabs are marketed after the onset of maturation.…”

mentioning

confidence: 99%

Trash fish facilitates protection against the deterioration in nutritional quality of adult female Chinese mitten crabs Eriocheir sinensis during winter

Liu

YongChun³

et al. 2022

Aquaculture Research

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In this study, we conducted a cage‐culture trial to evaluate the gonadal development and nutritional quality of adult female Chinese mitten crabs (Eriocheir sinensis) fed a formulated diet (FD), traditional diet (TD) or trash fish (TF) during wintering. The results revealed a marked reduction in the hepatopancreatic index (HSI) during 90 days of wintering, and that crabs fed the TF diet had a significantly higher HSI and total edible yield than those fed the TD diet after wintering (p < 0.05). In terms of proximate composition, protein and lipid contents in the ovaries showed significant increases over the wintering period, whereas there was a significant reduction in hepatosomatic protein levels. Among the three overwintering treatments, the contents of ovarian proteins and hepatosomatic lipids were significantly higher in TF crabs. Although the redness (a*) of the carapace and ovaries was found to have increased significantly during wintering, there was a significant reduction in hepatosomatic redness, which was consistent with the total carotenoid contents detected in these tissues. Moreover, among the three treatments, hepatosomatic redness was significantly higher in TF treatment after the overwintering period. In addition, nutritional quality index assessments revealed that crabs in the TF and TD groups were characterized by the highest and lowest values respectively. In conclusion, we found that the nutritional quality of adult female E. sinensis undergoes a marked decline during the wintering period. However, the provision of a TF diet can contribute to protecting against a deterioration in the nutritional quality of crabs maintained over winter.

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Does the wild-caught Chinese mitten crab megalopae perform better than the hatchery-produced seed during the juvenile culture?

Cited by 15 publications

References 13 publications

Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs

Comparative growth and morphometric assessment between cultures of wild and hatchery-produced mud crabs

Dietary DHA Oil Supplementation Promotes Ovarian Development and Astaxanthin Deposition during the Ovarian Maturation of Chinese Mitten Crab Eriocheir sinensis

Trash fish facilitates protection against the deterioration in nutritional quality of adult female Chinese mitten crabs Eriocheir sinensis during winter

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