Reproductive performance, offspring quality, proximate and fatty acid composition of normal and precocious Chinese mitten crab Eriocheir sinensis

Chang, Gouliang, Wu, Xugan, Cheng, Yongxu, Zeng, Chaoshu, and Yu, Zhiyong (2017) Reproductive performance, offspring quality, proximate and fatty acid composition of normal and precocious Chinese mitten crab Eriocheir sinensis. Aquaculture, 469. pp. 137-143.

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Precocity is a common phenomenon among farmed Chinese mitten crab Eriocheir sinensis that significantly affect culture productivity and profitability. This study compared the reproductive performance, offspring quality, proximate and fatty acid composition of pond-reared precocious and normal sexual matured females of E. sinensis. While the average gonado-somatic index (GSI) of the normal female crabs was significantly lower than that of the precocious crabs, fecundity, egg fertilization and hatching rate were significantly higher in the former. On the other hand, comparing various larval quality parameters measured with newly hatched larvae produced by the two types of females, only significant difference detected was dry weight with larvae produced by the normal females having significant higher dry weight. Biochemical analysis showed that eggs produced by precocious females contained a higher water content, but lower DHA, n-3 PUFA and n-3 HUFA contents than those produced by normal crabs and egg fertilization and hatching rates were, in general, correlated positively with the biochemical and fatty acid composition of the eggs. However, interestingly, such a correlation was not identified in newly hatched larvae. The results of hepatopancreas and ovarian proximate and fatty acid composition analysis suggested that lower reproductive performance of precocious females is likely related to the deficiencies in PUFA and general poorer nutrient conditions of these crabs.

Statement of relevance: The Chinese mitten crab, Eriocheir sinensis, is currently farmed throughout China. Precocity, commonly accounts for 15-30% of cultured crab populations, is a major problem for E. sinensis aquaculture. The precocious crabs reach terminal moult at small sizes, hence have low market value. To date, it is unknown whether the precocious crabs are reproductive functional. This study confirmed that precocious E. sinensis could produce viable offspring, and subsequently compared reproductive performance and offspring quality between normal and precocious E. sinensis, providing useful information for aquaculture of the species.

Item ID: 50295
Item Type: Article (Research - C1)
ISSN: 1873-5622
Keywords: Chinese mitten crab, precocity, reproductive performance, offspring quality, fatty acid composition
Funders: Chinese Government (CG), Taiwan Government (TG), Jiangsu Engineering Laboratory for Breeding of Special Aquatic Organisms (JELBSAO), Special Fund for Scientific Research in the Public Welfare of Agricultural Industry (SFSRPWAI), Jiangsu Collaborative Innovation Center of Regional Modern Agriculture & Environmental Protection (JCICRMAEP), Shanghai Agriculture Committee (SAC), Shanghai Municipal Science and Technology Commission (SMSTC), Shanghai Municipal Education Committee (SMEC)
Projects and Grants: CG and TG 2014DFT30270, JELBSAO CASB1307, SFSRPWAI 201203081, JCICRMAEP HSXT2017, SAC 2015D-1-7, SMSTC 16DZ2281200, SMEC project of fisheries (2015-62-0908)
Date Deposited: 20 Sep 2017 07:43
FoR Codes: 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3005 Fisheries sciences > 300501 Aquaculture @ 70%
31 BIOLOGICAL SCIENCES > 3109 Zoology > 310913 Invertebrate biology @ 30%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830101 Aquaculture Crustaceans (excl. Rock Lobster and Prawns) @ 100%
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