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长江和瓯江水系蟹种湖泊放养的技术效果 被引量:11
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作者 徐兴川 朱振东 +2 位作者 黎志强 吴勇斌 吴翠兰 《淡水渔业》 CSCD 北大核心 1992年第5期25-26,29,共3页
将长江和瓯江两水系天然蟹种引入长江中游附属湖泊进行单养和混养,长江水系蟹种的成蟹回捕率分别为30.16%、40.83%和30.19%,群体增重倍数分别为7.18、8.57和7.7;瓯江水系蟹种的成蟹回捕经分别为0.14%、0.32%和0.46%,群体增重倍数... 将长江和瓯江两水系天然蟹种引入长江中游附属湖泊进行单养和混养,长江水系蟹种的成蟹回捕率分别为30.16%、40.83%和30.19%,群体增重倍数分别为7.18、8.57和7.7;瓯江水系蟹种的成蟹回捕经分别为0.14%、0.32%和0.46%,群体增重倍数分别为1.22、2.84和3.1。在捕捞方面瓯江蟹种的成蟹有开捕季节晚、没有生产高峰、日产量低及蟹汛持续时间长等特点。 展开更多
关键词 蟹种 湖泊放养 天然蟹种
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网湖放养与池塘养殖鳙的肌肉品质比较分析 被引量:1
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作者 王森 马吉顺 +2 位作者 钟可儿 熊浩 周琼 《中国水产科学》 CAS CSCD 北大核心 2024年第5期557-575,共19页
为探究大水面养殖与池塘养殖模式下鱼类肌肉品质可能存在的差异及其原因,以鳙(Hypophthalmichthys nobilis)为研究对象,采集并观测湖北省网湖(网湖放养组)和周边养殖池塘(池塘养殖组)两组鳙的背部肌肉的表观、质构、营养和风味等特征,... 为探究大水面养殖与池塘养殖模式下鱼类肌肉品质可能存在的差异及其原因,以鳙(Hypophthalmichthys nobilis)为研究对象,采集并观测湖北省网湖(网湖放养组)和周边养殖池塘(池塘养殖组)两组鳙的背部肌肉的表观、质构、营养和风味等特征,并对两者的水质条件与饵料生物组成进行对比研究。结果显示:(1)网湖放养鳙的腹脂比(IPF)、肝体比(HSI)显著低于池塘养殖组(P<0.05),而两者的肥满度(CF)和脏体比(VSI)无显著差异(P>0.05);网湖放养鳙的背部鱼皮和背部鱼肉的亮度值(L^(*))和白度值(W)显著高于池塘养殖组(P<0.05);(2)网湖放养鳙肌肉的弹性、内聚性高于池塘养殖组(P>0.05),硬度显著低于池塘养殖组(P<0.05);(3)网湖放养鳙的水分、粗蛋白含量显著低于池塘养殖组(P<0.05),而粗脂肪含量显著高于池塘养殖组(P<0.05);网湖放养鳙的必需氨基酸含量及其评分显著高于池塘养殖组(P<0.05);网湖放养组和池塘养殖组的EAA/TAA比值分别为41.24%、40.84%,EAA/NEAA的比值分别为84.18%、83.03%,均符合FAO/WHO理想模式标准;网湖放养组的单不饱和脂肪酸、多不饱和脂肪酸均显著高于池塘养殖组(P<0.05);网湖放养鳙肌肉中Ca、Zn的含量高于池塘养殖组(P>0.05);(4)网湖放养组的鲜味氨基酸占比更高,苦味氨基酸占比更低;网湖放养组和池塘养殖组的最高气味活度值分别是呈青草味的己醛和油脂味的1-辛醛,对气味呈负面影响的1-己醇、3-戊酮等挥发性化合物含量及相对气味活度值(ROAV)在网湖放养组更低。研究结果表明,网湖放养鳙相对于池塘养殖组具有更好的形态特征、肌肉营养和风味品质,这与其养殖环境和天然饵料的差异有关。本研究可为大水面生态渔业的发展提供理论参考。 展开更多
关键词 大水面养殖 湖泊放养 池塘养殖 营养品质 水质分析 饵料组成
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Sustainable fisheries in shallow lakes:an independent empirical test of the Chinese mitten crab yield model
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作者 王海军 梁小民 王洪铸 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2017年第4期894-901,共8页
Next to excessive nutrient loading,intensive aquaculture is one of the major anthropogenic impacts threatening lake ecosystems.In China,particularly in the shallow lakes of mid-lower Changjiang(Yangtze) River,continuo... Next to excessive nutrient loading,intensive aquaculture is one of the major anthropogenic impacts threatening lake ecosystems.In China,particularly in the shallow lakes of mid-lower Changjiang(Yangtze) River,continuous overstocking of the Chinese mitten crab(Eriocheir sinensis) could deteriorate water quality and exhaust natural resources.A series of crab yield models and a general optimum-stocking rate model have been established,which seek to benefit both crab culture and the environment.In this research,independent investigations were carried out to evaluate the crab yield models and modify the optimum-stocking model.Low percentage errors(average 47%,median 36%) between observed and calculated crab yields were obtained.Specific values were defined for adult crab body mass(135 g/ind.) and recapture rate(18%and 30%in lakes with submerged macrophyte biomass above and below 1 000 g/m^2)to modify the optimum-stocking model.Analysis based on the modified optimum-stocking model indicated that the actual stocking rates in most lakes were much higher than the calculated optimum-stocking rates.This implies that,for most lakes,the current stocking rates should be greatly reduced to maintain healthy lake ecosystems. 展开更多
关键词 Chinese mitten crab sustainable fishery yield model optimum-stocking model independent test Changjiang lakes
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Phosphorus Fractions in Water and Sediment and Their Correlations in Hengshui Lake, China
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作者 Zhanchen Li Fang Liu Zhe Qin Shuxuan Liang 《Journal of Environmental Science and Engineering(A)》 2016年第7期356-361,共6页
Sediment is a principal reservoir which accumulates and releases the pollutants. It is an important way of nutrients releasing from pore water of sediments to overlying water across the sediment-water interface. Five ... Sediment is a principal reservoir which accumulates and releases the pollutants. It is an important way of nutrients releasing from pore water of sediments to overlying water across the sediment-water interface. Five sampling sites were selected in the Hengshui Lake. Overlying water and sediments were collected in each of them. The phosphorus fractions and their relationships were analyzed. The results showed that the change of the total phosphorus (TP) in sediment was similar to that of the total dissolved phosphorus (TDP) and soluble orthophosphate (PO4^3-) in pore water. The concentrations of PO4^3- in pore water were higher than those in overlying water, reflecting a possible diffuse trend for PO4^3-P in the five zones of Hengshui Lake. It is indicated that phosphorus and other nutrients will be transferred from sediment to pore water and then to overlying water, which can lead to lake eutrophication. 展开更多
关键词 SEDIMENT pore water overlying water phosphorus fractions Hengshui Lake.
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