摘要
文章研究了香港牡蛎在异地基围育肥时的生长特点及形态和体成分变化特点,为深入研究牡蛎对池塘综合养殖生态系统中碳、氮元素的利用。来源于广西钦州茅尾海的2龄香港牡蛎Crassostrea hongkongensis(平均体质量68 g)在湛江湖光镇的鱼虾混养基围中浮筏育肥44d,定期采集育肥牡蛎样品,测定牡蛎的形态、生长、软体组织粗成分、N%及C%、δ^(15)N和δ^(13)C值等指标,并分析了这些指标的相关性。结果显示:经过44d的育肥,牡蛎的壳高、软体组织质量、出肉率和脂肪含量显著升高(P<0.05),蛋白和灰分含量显著降低(P<0.05),壳长、壳宽、体质量和水分含量无显著变化(P>0.05);牡蛎软体组织δ^(15)N值、δ^(13)C值及贝壳δ^(13)C值都显著下降(P<0.05),其中软体组织δ^(15)N和δ^(13)C值在育肥16d之后就与初始样品产生了显著差异(P<0.05),这表明香港牡蛎能够迅速利用育肥基围中丰富的食物资源,使软体组织迅速生长。在育肥过程中牡蛎出肉率与软体组织质量极显著正相关(P<0.01),与贝壳δ^(13)C、软体δ^(15)N、δ^(13)C、N%及C%极显著负相关(P<0.01),而与壳长、壳宽、壳高和体质量等指标无显著相关(P>0.05)。在育肥过程中牡蛎贝壳C%与软体组织N%及C%显著正相关(P<0.05),与软体组织δ^(15)N极显著正相关(P<0.01);而软体组织C%则与出肉率极显著负相关(P<0.01),与贝壳C%和软体δ^(13)C显著正相关(P<0.05),与软体δ^(15)N和软体N%极显著正相关(P<0.01)。这些相关性表明,监测这些指标的变化可以更好地确定育肥牡蛎是否适应育肥环境,能否获得充足的食物从而快速生长。育肥过程牡蛎的快速生长会导致香港牡蛎的单位体重碳含量显著下降,这是在计算香港牡蛎碳汇效益时必须注意的。研究结果还表明,香港牡蛎灰分含量及碳、氮稳定同位素特征很容易受到异地短期育肥的影响,在采用无机元素和碳、氮稳定同位素作为�
In order to provide the basis data for further study of carbon and nitrogen utilization in integrated culture pond ecosystem,the growth characteristics,morphology and body composition changes of Hongkong oysters during off-site fattening were studied.Hongkong oysters Crassostrea hongkongensis(2-year-old) with an initial weight of 68.00 g were obtained from Maowei Sea,Qinzhou,Guangxi,and were fattened on floating rafts for 44d in a fishshrimp polyculture pond in Huguang Town,Zhanjiang.The oyster samples were collected during fattening regularly,and the morphological indicators,growth indicators,gross composition of soft tissue,carbon and nitrogen stable isotope values(δ~(13)C and δ~(15)N) of oyster samples were determined,and the correlation of these indicators were analyzed.The results showed that,after 44d fattening,the shell height,soft tissue quality,meat yield and fat content of 2-year-old oysters were significantly increased(P0.05),the protein and ash contents were significantly decreased(P0.05),while the shell length,shell width,body mass and moisture content did not showed significant difference(P0.05).The δ~(15)N,δ~(13)C of the soft tissue and shell δ~(13)C values of oysters all decreased significantly(P0.05),and the δ~(15)N and δ~(13)C values of the soft tissue were significantly different from the initial samples after 16 days of fattening(P0.05),which indicating that oysters could quickly utilize the abundant food sources of fattening pond,and obtained rapid grow of soft tissues.During the fattening process,the meat yield of oyster was significantly positively correlated with the mass of soft body(P0.05),extremely significantly negatively correlated with shell δ~(13)C,δ~(15)N,δ~(13)C,N% and C% of soft body(P0.01),and had a extremely significant negative correlation with shell length,shell width,shell height and body mass(P0.01).However,there was no significant correlation between the meat yield of oyster and the shell length,shell width,shell height and body mass(P0.05).During the fattening p
作者
汤保贵
周晖
赵力强
伍栩民
彭梓峰
钟培贵
于鸽
TANG Bao-Gui;ZHOU Hui;ZHAO Li-Qiang;WU Xu-Min;PENG Zi-Feng;ZHONG Pei-Gui;YU Ge(Fisheries College,Guangdong Ocean University,Zhanjiang 524025,China;Haiste(Zhanjiang)Aquatic Technology Co.,Ltd.,Zhanjiang 524099,China;Guangdong Evergreen Breeding Technology Service Co.,Ltd.,Zhanjiang 524094,China)
出处
《水生生物学报》
CAS
CSCD
北大核心
2023年第11期1762-1768,共7页
Acta Hydrobiologica Sinica
基金
广东省南美白对虾现代种业产业园(K22218)
湛江市乡村振兴科技特派员项目
国家海洋局“十三五”海洋经济创新发展示范市项目(XM-202012-03B2)资助。
关键词
育肥
体成分
碳、氮稳定同位素
碳含量
香港牡蛎
Fattening
Body composition
Stable carbon and nitrogen isotopes
Carbon content
Crassostrea hong-kongensis
