Comparison of reproductive performance, embryo color and biochemical composition of white and green carapace strains of Chinese mitten crab (Eriocheir sinensis)
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摘要: 为探明白壳色中华绒螯蟹 (Eriocheir sinensis) 新品系的繁殖性能,在室内养殖桶中比较了中华绒螯蟹白壳和常规绿壳品系繁殖性能和原肠胚期胚胎质量。结果显示:1) 白壳组雌体交配后抱卵速度、成活率和抱卵率均高于绿壳组,但白壳组的抱卵量、生殖力和生殖指数均略低于绿壳组,两组雌体所产胚胎的卵径、单个卵湿质量和干质量也无显著性差异 (P>0.05)。2) 两组胚胎干样色泽参数均无显著性差异,且胚胎中总类胡萝卜素、玉米黄素、角黄素以及β-胡萝卜素含量接近 (P>0.05);但白壳组胚胎干样中虾青素和叶黄素含量显著低于绿壳组 (P<0.05)。3) 白壳和绿壳组胚胎中水分、脂肪和蛋白质量分数接近,无显著性差异 (P>0.05);白壳组胚胎中顺-9-十八碳一烯酸 (C18:1 n-9)质量分数显著高于绿壳组 (P<0.05),其余脂肪酸质量分数均无显著性差异 (P>0.05)。结果表明,中华绒螯蟹白壳品系雌体的抱卵速度快于绿壳品系,整体上白壳和绿壳品系具有相似的繁殖性能和胚胎质量。Abstract: To investigate the reproductive performance of a new white carapace strain of Chinese mitten crab (Eriocheir sinensis), we compared the breeding experiments and gastral embryo quality of white and green carapace strains in indoor tanks. The results show that the ovigerous rate, survival rate and spawning rate of the white carapace strain were higher than those of the green carapace strain, but the egg production, fecundity and reproductive effort of the white carapace strain were slightly lower than those of the green strain. There were no significant differences in the egg diameter, wet and dry mass of single egg between the two strains (P>0.05). In addition, no significant differences were found in the color parameters in dried eggs (P<0.05) and the contents of total carotenoids, zeaxanthin, canthaxanthin and β-carotene in both strains were similar (P>0.05), but the contents of astaxanthin and lutein in dried eggs in the white carapace strain were significantly lower than those in the green carapace strain (P<0.05). Besides, the eggs of both strains had similar moisture, total lipid and crude protein contents (P>0.05). As for fatty acid composition of eggs, the percentage of C18:1 n-9 in the white carapace strain was significantly higher than that in the green carapace strain (P<0.05), but there were no significant differences in other fatty acid contents (P>0.05). In conclusion, the female ovigerous rate of the white carapace strain is faster than that of the green carapace strain, but the reproductive performance, eggs color and proximate composition are similar.
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Key words:
- Eriocheir sinensis /
- White carapace strain /
- Reproductive performance /
- Embryo quality /
- Carotenoids
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表 1 白壳和绿壳雌体和雄体亲本的生物学性状
Table 1. Biological characteristics of white and green carapace strains of E. sinensis broodstock
类目 Item 雌体 Female (N=30) 雄体 Male (N=9) 白壳 White carapace 绿壳 Green carapace 白壳 White carapace 绿壳 Green carapace 体质量
Body mass/g161.85±12.39 152.45±10.13 222.57±3.31 215.65±12.09 甲壳长
Carapace length/cm62.12±1.44 60.52±0.70 67.34±0.56 66.63±0.96 甲壳宽
Carapace width/cm68.51±1.45 67.52±1.14 74.79±1.79 75.07±1.16 表 2 中华绒螯蟹白壳和绿壳品系雌蟹亲本成活率、抱卵率和生殖性能比较
Table 2. Survival rate, ovigerous and reproductive performance of white and green carapace strains of E. sinensis broodstock
类目
Item样本数
Sample number白壳
White carapace绿壳
Green carapace成活率 survival rate/% 30 93.33±6.67 86.67±8.82 抱卵率 Ovigerous rate/% 30 92.50±3.82 83.74±6.18 抱卵量 Egg production/(104 粒·只−1) 6 43.33±8.38 44.88±3.73 生殖力 Fecundity/(粒·g−1) 6 3 083.68±429.67 3 361.96±150.18 生殖指数 Reproductive effort/% 6 11.71±1.12 12.57±0.40 表 3 中华绒螯蟹白壳和绿壳品系卵径和单卵质量比较 (N=6)
Table 3. Comparison of egg diameter and egg mass of white and green carapace strains of E. sinensis broodstock
类目
Item白壳
White carapace绿壳
Green carapace卵径 Egg diameter/μm 369.99±3.82 370.04±2.76 单卵湿质量 Egg wet mass/μg 45.41±1.65 42.92±1.10 单卵干质量 Egg dry mass/μg 12.06±0.67 11.42±0.35 表 4 中华绒螯蟹白壳和绿壳品系雌体胚胎色泽参数和总类胡萝卜素质量分数比较 (湿质量,N=6)
Table 4. Color parameters and carotenoids content of eggs produced by white and green carapace strains of E. sinensis broodstock (wet mass, N=6) mg·g−1
类目
Item白壳
White carapace绿壳
Green carapace湿样 Fresh 亮度 L* 33.17±0.91 30.69±0.83 红度 a* 5.14±0.36a 3.67±0.42b 黄度 b* 5.72±0.77 4.07±0.47 干样 Dried 亮度 L* 53.79±1.19 52.19±0.88 红度 a* 14.96±0.84 16.80±1.20 黄度 b* 18.63±1.04 19.81±1.61 总类胡萝卜素 Total carotenoids 291.41±40.45 400.47±60.36 虾青素 Astaxanthin 11.78±1.45a 19.29±2.19b 叶黄素 Lutein 16.53±2.21a 30.05±4.77b 玉米黄素 Zeaxanthin 3.43±0.60 3.61±0.98 角黄素 Canthaxanthin 3.02±0.15 2.71±0.22 β-胡萝卜素 β-carotene 22.56±4.10 44.55±9.77 注:同行标有不同小写字母表示组间差异显著 (P<0.05),表5同此。 Note: Values with different small letters within the same row have significant difference (P<0.05). The same case in the Table 5. 表 5 中华绒螯蟹白壳和绿壳品系雌体卵常规生化和脂肪酸组成比较 (湿质量)
Table 5. Proximate composition and fatty acid composition of eggs produced by white and green E. sinensis broodstock (wet mass) %
类目
Item白壳
White carapace绿壳
Green carapace类目
Item白壳
White carapace绿壳
Green carapace水分 Moisture 74.88±0.46 76.45±0.52 总单饱和脂肪酸 ΣMUFA 30.33±1.40 29.67±0.79 脂肪 Lipid 5.58±0.15 5.66±0.18 亚油酸 C18:2 n-6 14.21±1.56 12.18±2.00 蛋白 Protein 6.24±0.08 5.96±0.15 α-亚麻酸 C18:3 n-3 4.21±0.54 4.38±0.30 肉豆蔻酸 C14:0 0.69±0.05 0.96±0.16 二十碳二烯酸 C20:2 n-6 2.26±0.20 1.81±0.18 十五碳酸 C15:0 0.43±0.04 0.5±0.02 花生四烯酸 C20:4 n-6 3.85±0.46 3.45±0.29 棕榈酸 C16:0 10.12±0.22 10.01±0.11 二十碳三烯酸 C20:3 n-3 0.28±0.02 0.41±0.05 珠光脂酸 C17:0 0.73±0.05 0.91±0.07 二十碳五烯酸 C20:5 n-3 (EPA) 7.05±0.44 7.74±0.64 硬脂酸 C18:0 8.03±0.72 8.24±0.43 二十二碳五烯酸 C22:5 n-3 0.82±0.04 0.75±0.04 花生酸 C20:0 0.49±0.02 0.44±0.12 二十二碳六烯酸 C22:6 n-3 (DHA) 8.50±1.51 9.33±1.52 总饱和脂肪酸 ΣSFA 20.48±0.69 21.05±0.23 总多不饱和脂肪酸 ΣPUFA 41.18±0.90 40.05±0.67 肉豆蔻烯酸 C14:1 n-5 0.08±0.01 0.09±0.01 总长链多不饱和脂肪酸 ΣLC-PUFA 22.76±1.39 23.50±1.84 棕榈油酸 C16:1 n-7 6.24±0.84 6.39±0.59 总n-3长链多不饱和脂肪酸 Σn-3 PUFA 21.14±1.34 23.02±1.88 十七碳一烯酸 C17:1 n-7 0.93±0.07 1.09±0.02 总n-6长链多不饱和脂肪酸 Σn-6 PUFA 20.32±2.09 17.44±2.37 顺-9-十八碳一烯酸 C18:1 n-9 18.57±0.51a 16.28±0.55b n-3长链多不饱和脂肪酸/n-6长链
多不饱和脂肪酸 n-3/n-61.18±0.28 1.49±0.31 顺-7-十八碳一烯酸 C18:1 n-7 2.26±0.50 2.07±0.54 n-3长链多不饱和脂肪酸/n-6长链
多不饱和脂肪酸 n-3/n-61.18±0.28 1.49±0.31 二十碳一烯酸 C20:1 n-9 1.70±0.13 2.12±0.26 二十二碳六烯酸/二十碳五烯酸
DHA/EPA1.20±0.17 1.18±0.11 芥酸 C22:1 n-9 0.54±0.13 1.05±0.20 -
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