首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 986 毫秒
1.
分别以16∶1(n-7)/16∶0和EPA作为硅藻特征脂肪酸标志;20∶4(n-6)作为褐藻特征脂肪酸标志;DHA及DHA/EPA作为原生动物特征脂肪酸标志;18∶1(n-7)和oddbr FAs作为细菌特征脂肪酸标志,研究分析了悬浮颗粒物的生物组成的季节变化、附着基附着物的生物组成的季节变化以及二者对刺参食物来源组成的影响。分析结果表明,硅藻、鞭毛藻或原生动物及多种异养细菌均为悬浮颗粒物的主要生物组成,且各类生物组成比例的季节变化显著(P0.05);硅藻、褐藻、鞭毛藻或原生动物及多种异养细菌均为附着基附着物的重要生物组成,且各类生物组成比例的季节变化显著(P0.05)。对比悬浮颗粒物、附着基及刺参的食物组成可以发现,附着基附着物对刺参的食物组成有重要的贡献,悬浮颗粒物也是刺参的食物来源之一。  相似文献   

2.
运用脂肪酸标志法分析刺参食物来源的季节变化   总被引：2，自引：2，他引：0  
高菲  许强  杨红生 《水产学报》2010,34(5):760-767
运用脂肪酸标志法分析了刺参的食物组成及季节变化。刺参饵料中含有硅藻、褐藻、多种异养细菌、大型绿藻、鞭毛藻或原生动物等,其中硅藻、褐藻和细菌在全年的食物贡献比较大,各种饵料来源比例具有显著的季节变化。实验期间,刺参体壁的硅藻脂肪酸标志22:5(n-3)相对含量很高(7.24%～14.45%),且16:1(n-7)/16:0比值全年在0.73～1.82之间(平均1.10),表现出典型的硅藻脂肪酸特征,表明硅藻是刺参主要的食物来源。褐藻脂肪酸标志20:4(n-6)在刺参体壁脂肪酸组成中相对含量较高(4.88%～8.16%),且在秋冬季节达到较高水平,表明秋冬季节褐藻类对刺参的食物贡献可能较大。噬纤维菌—黄杆菌类的脂肪酸标志奇数碳及支链脂肪酸(Odd&brFAs,5.31%～8.29%)和变形细菌的脂肪酸标志[18:1(n-7),5.85%～6.86%]相对含量比较高,表明细菌在全年都是刺参重要的食物来源。主成分分析发现,1月份刺参的主要食物来源是硅藻、鞭毛藻或原生动物、褐藻及细菌;3月份硅藻、鞭毛藻或原生动物、大型绿藻的食物贡献较大;6月份大型绿藻在刺参的食物来源中占较大比重;7月份细菌和大型绿藻的食物贡献较大,细...  相似文献   

3.
许强  高菲  杨红生 《水产学报》2010,34(12):1853-1859
运用脂肪酸标志法分析了海带新鲜组织、降解组织及脱落碎屑中定殖微型生物群落的组成特征。研究结果显示,降解组织和脱落碎屑的总脂含量显著提高,单不饱和脂肪酸和多不饱和脂肪酸相对含量降低。降解组织和脱落碎屑中细菌脂肪酸标志18∶1(n-7)和奇数碳及支链脂肪酸含量相比于新鲜叶片有大幅度的提高,表明碎屑中定殖了繁盛的细菌群落;海带碎屑的硅藻脂肪酸标志16∶1(n-7)/16∶0比值最高,降解组织中该比值也显著高于新鲜叶片,表明硅藻类也大量定殖于海带降解组织和碎屑中。鲜海带组织中不含原生动物脂肪酸标志——DHA,而在降解叶片和脱落碎屑中都检测到一定含量的该标志物(0.65%和1.57%),指示了原生动物在海带降解组织和碎屑中的定殖。各种微型生物的定殖与生物降解作用显著改变了降解海带叶片及海带碎屑的有机碳氮特征,新鲜海带叶片组织碳、氮比值高达17.32,而降解组织和海带碎屑有机氮含量有较大幅度的升高,碳、氮比值则分别下降为6.61和6.48。研究结果表明,海带脱落碎屑并非单一成分,而是以海带降解残片为主体,同时混杂有硅藻类、细菌和原生动物群落的混合体。海带碎屑通过各种微型生物的定殖与生物降解作用,其有机氮含量升高,碳、氮比...  相似文献   

4.
为分析辽东湾海水生态养殖池塘仿刺参的食性特征,分别于2016年3月、5月、7月、9月、12月采集池塘中的浮游植物、浮游动物、颗粒有机物、底栖硅藻、表层底泥和仿刺参,并检测所有样品的δ13C和δ15N值。运用IsoSource线性混合模型计算出浮游植物、浮游动物、颗粒有机物、底栖硅藻、表层底泥对仿刺参的饵料贡献率。试验结果显示,底栖硅藻对仿刺参的平均饵料贡献率周年变化为78.5%～85.7%,颗粒有机物、浮游植物、浮游动物和表层底泥对仿刺参的贡献率分别为2.1%～5.1%、2.2%～5.6%、2.3%～7.7%、3.6%～7.9%。底栖硅藻对消化管内含物δ13C值的贡献率为25.8%～74.5%、颗粒有机物、浮游植物、浮游动物和表层底泥对消化管内含物δ13C值的贡献率分别为3.9%～15.3%、4.0%～18.3%、4.2%～19.4%、5.6%～22.2%。试验结果表明,在不投饵、缺乏底栖大型藻类的生态养殖池塘中,底栖硅藻是仿刺参主要的食物来源,仿刺参也摄食表层底泥、沉降后颗粒有机物和浮游动植物。研究结果可为海水池塘仿刺参的生态健康养殖提供基础数据。  相似文献   

5.
野生与人工养殖牙鲆亲鱼不同组织脂肪酸的比较   总被引：6，自引：1，他引：5  
为研究脂肪酸对牙鲆繁育性能的影响, 采用生物化学方法, 对野生和养殖牙鲆亲鱼肌肉、肝脏及卵中脂肪酸组成分别进行测定。结果表明: (1) 牙鲆肌肉、肝脏和卵中脂肪含量大小关系为肝脏>卵>肌肉。野生亲鱼肌肉和卵中脂肪含量显著低于养殖亲鱼(P<0.05), 肝脏脂肪含量与养殖亲鱼无显著差异; (2) 牙鲆亲鱼3种组织中均检测出21种脂肪酸。野生亲鱼肌肉中饱和脂肪酸(SFA)与养殖亲鱼无显著差异, 单不饱和脂肪酸(MUFA)显著低于养殖亲鱼(P<0.05)。肝脏和卵中SFA显著高于养殖亲鱼(P<0.05), MUFA与养殖亲鱼无显著差异; (3) 野生亲鱼肌肉、肝脏和卵中高不饱和脂肪酸(PUFA)的含量, 尤其是肝脏和卵中C20:5n-3(EPA)、C22:6n-3(DHA)的含量均显著低于养殖亲鱼(P<0.05), 但肌肉和卵中的C20:4n-6(ARA)含量明显高于养殖亲鱼(P<0.05); (4) 野生牙鲆亲鱼肌肉、肝脏和卵中n-3/n-6 PUFA及EPA/ARA显著低于养殖亲鱼(P<0.05), 肝脏中DHA/EPA显著高于养殖亲鱼(P<0.05), 但野生亲鱼肌肉和卵中的DHA/EPA与养殖亲鱼无显著差异。比较结果说明, DHA、EPA和ARA等PUFA是与牙鲆繁殖性能密切相关的重要脂肪酸。在牙鲆亲鱼养殖过程中, 除了提供牙鲆亲鱼足够的脂肪酸营养外, 也应注意各种脂肪酸, 尤其是PUFA中各种脂肪酸之间的添加比例, 从而保证亲鱼的繁殖性能及卵和仔鱼的质量。  相似文献   

6.
牙鲆幼鱼对EPA和DHA的营养需求   总被引：5，自引：2，他引：5  
薛敏 《水产学报》2004,28(3):285-291
研究了EPA和DHA水平对牙鲆生长的影响,饲料中含0.5%EPA和1.0%～1.5%DHA能保证牙鲆幼鱼最适生长,鱼体水分最低,肝体指数最小,脂肪含量有较大幅度提高,肝脏极性脂中EPA和DHA达到最大积累;在肝脏和肌肉的非极性脂部分,各组间的脂肪酸组成没有显著变化,而极性脂部分能体现出饲料中n-3 HUFA含量对鱼体脂肪酸组成的影响,极性脂中的EPA和DHA含量远高于非极性脂;在肌肉和肝脏的极性脂和非极性脂中都含有较高的16:0和18:1n-9; 18:1n-9/n-3HUFA可以作为必需脂肪酸满足程度的一个判据,18:1n-9值的升高往往是缺乏必需脂肪酸的表现,在生长最佳时18:1n-9/n-3HUFA比值下降,为0.62和0.74.  相似文献   

7.
多个条斑紫菜品系采收期内脂肪酸组成、含量的变化分析   总被引：1，自引：0，他引：1  
为探讨条斑紫菜不同栽培品系、不同采收期脂肪酸组成及含量的变化,本实验对10个栽培品系进行了跟踪测定分析,结果显示:条斑紫菜的脂肪酸组成稳定,与品系、采收期内季节性变化无关,但含量存在明显的差异。各品系的3个采收期的饱和脂肪酸(16∶0为主,包括13∶0、16∶0、18∶0)的相对含量约为20%;不饱和脂肪酸(以EPA为主,包括18∶1 n-9、18∶2 n-6、18∶3 n-3、20∶1 n-9、20∶2 n-7、20∶3 n-7、20∶4 n-6(AA)、20∶5 n-3(EPA))的相对含量为70%左右。在温度最低2月份的采收样品中,总脂肪酸和EPA含量最高,显示低温有利于条斑紫菜脂肪酸尤其是EPA的积累。另外,条斑紫菜富含以EPA为主的不饱和脂肪酸,在整个采收期内,样品中的n-6/n-3比值为4.9～7.7,符合WHO/FAO膳食推荐值。  相似文献   

8.
深水网箱和池塘养殖凡纳滨对虾肌肉营养成分的比较分析   总被引：2，自引：0，他引：2  
对深水网箱和池塘养殖凡纳滨对虾(Litopenaeus vannamei)肌肉常规营养成分、氨基酸和脂肪酸质量分数进行了比较分析。结果显示:1)网箱养殖对虾肌肉粗蛋白质量分数显著高于池塘养殖(P0.05),而水分、粗脂肪和粗灰分质量分数无显著差异(P0.05);2)肌肉中检测到18种常见氨基酸,网箱养殖对虾肌肉氨基酸总量(TAA)、天门冬氨酸(Asp)、异亮氨酸(Ile)、精氨酸(Arg)和脯氨酸(Pro)质量分数显著高于池塘养殖(P0.05),而必需氨基酸(EAA)、半必需氨基酸(HEAA)、鲜味氨基酸(DAA)和虾味氨基酸(PFAA)两者无显著差异(P0.05);3)肌肉中检测到30种常见脂肪酸,两者的饱和脂肪酸(SFA)、单不饱和脂肪酸(MUFA)、多不饱和脂肪酸(PUFA)、n-3多不饱和脂肪酸(EPA和DHA)质量分数差异显著(P0.05),以网箱养殖对虾较高;两者的棕榈酸(C16∶0)质量分数最高,且网箱养殖对虾EPA+DHA质量分数是池塘养殖的1.90倍。结果表明,网箱养殖对虾营养成分要优于池塘养殖,具有较高的营养价值。  相似文献   

9.
为研究相同海域滩涂和池塘养殖方格星虫(Sipunculus nudus Linnaeus)营养组成的异同,比较了2种养殖方式下的方格星虫体壁脂肪酸、氨基酸、矿物元素和基本营养物质组成。结果显示,滩涂和池塘养殖方格星虫体壁的粗蛋白、粗脂肪、灰分、脂肪酸总量相近(P0.05)。滩涂和池塘养殖星虫的C22:0、C20:3(n-3)、C16:1、C18:2(n-6)、C23:0含量差异显著(P0.05),且作为硅藻脂肪酸特征的C16:1(n-7)/C16:0比值和C20:5(n-3)也具有显著差异(P0.05)。池塘养殖的方格星虫谷氨酸(Glu)、总氨基酸含量显著高于滩涂养殖(P0.05),而必需氨基酸之间无显著差异(P0.05)。池塘养殖方格星虫体壁和沉积物中的钾(K)、钠(Na)、镁(Mg)、钙(Ca)、硒(Se)含量均高于滩涂养殖方格星虫相应体壁和沉积物中的含量(P0.05),而且2种养殖方式下的方格星虫体壁K、Se含量均显著高于相应沉积物中的含量(P0.05)。综合分析表明,相同海域不同养殖方式并不会显著影响方格星虫的基本营养组成(粗蛋白、粗脂肪、灰分),但是对于Glu、总氨基酸以及C22:0、C20:3(n-3)、C16:1、C16:1(n-7)/C16:0比值和C20:5(n-3)等具有影响。方格星虫对K、Na、Mg、Ca、Se具有一定程度的富集作用,而对于铁(Fe)、锌(Zn)、锰(Mn)、铜(Cu)、铅(Pb)、铬(Cr)、镉(Cd)、钴(Co)等元素无明显富集作用。  相似文献   

10.
大鳍鳠产卵前后肌肉脂肪酸组成变化的研究   总被引：1，自引：0，他引：1  
采用毛细管气相色谱法,对产卵前后大鳍鳠肌肉中的脂肪酸组成进行了测定。结果表明,大鳍鳠肌肉中脂肪酸种类丰富,含有22种脂肪酸,油酸(C18:1n-9)所占比例最高,其次为软脂酸(C16:0)、棕榈酸(C16:1n-7)、亚油酸(C18:2n-6),所占比例分别为22.38%~37.57%、18.86%~23.95%、7.00%~11.52%、7.46%~9.97%。EPA和DHA在大鳍鳠肌肉中占有较高的比例,EPA占总脂肪酸的5.39%,DHA占5.44%。在野生大鳍鳠产卵前后的22种脂肪酸中有8种饱和脂肪酸(SFA),6种单不饱和脂肪酸(MUFA)和8种多饱和脂肪酸(PUFA),大鳍鳠肌肉中脂肪酸在产卵前后表现出差异。  相似文献   

11.
The purpose of this study was to evaluate the effect of varying dietary levels of highly unsaturated fatty acids (HUFAs) in live prey (Artemia nauplii and a calanoid copepod, Schmackeria dubia) on the growth performance, survival, and fatty acid composition of the lined seahorse, Hippocampus erectus, juveniles. Artemia nauplii were enriched with a commercial product (SS? 50DE‐microcapsule as HUFA source, 2/3 DHA, 1/3 EPA. Shengsuo Fishery Feed Research Center of Shandong Province, Qingdao, China) at four concentrations of 0.0, 14.0, 28.0, and 56.0. Newly hatched juveniles were cultured for 35 days. The content of docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA), and n‐3 HUFAs in the Artemia nauplii was positively related to the enrichment concentration. At the end of the trials, growth performance of the juveniles was positively related to the enrichment concentration as well. However, the juveniles fed prey enriched with the highest concentration of enrichment (56.0 μL/L) had the significantly lower (P < 0.05) survival rate. The juveniles fed the copepod had the best growth performance and the highest survival rate, suggesting that the copepod, S. dubia, is suitable for feeding the seahorse juveniles. The comparisons between the growth, survival, and fatty acid profiles of the juveniles fed Artemia and copepods indicate that the seahorse juveniles require dietary levels of DHA beyond those achieved by enriching prey with the HUFA enrichment. Surplus EPA resulted from an imbalance between DHA and EPA in the enriched Artemia nauplii probably caused an adverse effect on the seahorse juveniles. This study suggests that DHA and EPA requirement of the lined seahorse juveniles is roughly 32% of total fatty acid, and the optimal DHA/EPA ratio for the species is circa 4:1. To avoid an adverse effect resulting from excessive EPA, maximum proportion of EPA in enriched Artemia nauplii should not exceed 13% of total fatty acid, and a recommended minimum DHA/EPA ratio in the enriched Artemia nauplii is 1.46. Arachidonic acid (20:4n‐6) might not be an essential fatty acid for the seahorse juveniles.  相似文献   

12.
The copepod Cyclopina kasignete is a potential live food in aquaculture and its fatty acid components and digestive enzymes were investigated. Three dry algal products (mixed algae, Melosira sp. and Nannochloropsis oculata) and two fresh microalgae (Tisochrysis lutea and N. oculata) were fed to the copepod for 30 days. The essential fatty acids (EFA) in copepods were altered by feeding different types of dry algae. The copepod fed dry Melosira sp. or fresh T. lutea contained higher eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and arachidonic acid (ARA), protease and trypsin than fed on other algae. The copepod contained a similar fatty acid profile and digestive enzymes by feeding either dry or fresh N. oculata. Between fresh algal species, the copepod fed T. lutea contained higher EPA, DHA and ARA than that fed fresh N. oculata. The amounts of EPA and DHA in copepods were more concentrated than those in the dietary algae, suggesting that the copepod has the ability to accumulate some EFA. This study indicates that dietary algae can modify the nutritional composition and in digestive enzymes copepods, which in turn may be able to transfer suitable nutrients and digestive enzymes to fish larvae in aquaculture.  相似文献   

13.
A feeding study was conducted in the winter 2001 to determine the effects of feeding rotifers (Brachionus plicatilis) enriched with various levels of essential fatty acids on the growth and survival of haddock larvae (Melanogrammus aeglefinus). Rotifer enrichment treatments were: 1) mixed algae, 2) high DHA (docosahexaenoic acid, 22:6n-3), 3) high DHA and EPA (eicosapentaenoic acid, 20:5n-3), and 4) DHA, EPA, and AA (arachidonic acid, 20:4n-6). Larvae were fed rotifers enriched with the different treatments from days 1 to 16 post-hatch. From day 17 until 25 all treatment groups were fed rotifers reared on mixed algae and then weaned onto the International Council for Exploration of the SEA (ICES) Standard Reference Weaning diet (http://allserv.rug.ac.t/aquaculture/rend/rend.htm) over a five day period. The experiment was terminated on day 41 post-hatch. The enrichment treatments affected the fatty acid composition of the rotifers and correlated with the accumulation of these fatty acids in the haddock larvae. However, no significant differences in larval growth or survival to 40 days post hatch were detected, suggesting that all treatments provided the minimal essential fatty acid requirements for haddock.  相似文献   

14.
ABSTRACT

The aim of this work was to study the seasonal variations of the proximate compositions, fatty acids contents, and related lipid indices (atherogenic index [AI], thrombogenic index [TI], and polyene index [PI]) of golden grey mullet (Liza aurata) and gold band goatfish (Upeneus moluccensis) caught from the northeastern Mediterranean Sea. Proximate compositions and fatty acid contents of both fish species showed statistically significant seasonal variations (p < 0.05). The lipid contents were highest in autumn and lowest in winter in golden grey mullet and gold band goatfish. The main saturated and unsaturated fatty acids were palmitic acid (C16:0), stearic acid (C18:0), palmiteoleic acid (C16:1n-7), oleic acid (18:1n-9c), arachidonic acid (C20:4n-6), eicosapentaenoic acid (EPA, C20:5n-3), and docosahexaenoic acid (DHA, C22:6n-3). The total polyunsaturated fatty acids in gold band goatfish did not show any differences among the seasons, whereas that in golden grey mullet was highest in winter. Levels of EPA, DHA, and n-3/n-6 ratios, as well as AI, TI, and PI, were significantly changed among seasons. The results show that golden grey mullet and gold band goatfish, which are among the important fish in Turkey and of commercial value, are a good source for human consumption in terms of their nutritional quality.  相似文献   

15.
ABSTRACT

In this study, the functional components of 19 microalgae and 6 bivalve species were investigated in the context of the application in bivalve feeding and human health food. Principal component analysis was performed to detect any association between the functional components and individual microalgal species or taxonomic group. The proportions of the functional components differed depending on the taxonomic group or species of microalga. The genera Cheatoceros, Thalassiosira, and Isochrysis contained high concentrations of fucosterol and fucoxanthin, which are present in large amounts in brown algae. Diatoms, haptophytes, and eustigmatophytes, which are used as feed for bivalves, were rich in fucosterol and eicosapentenoic acid (EPA); further, haptophytes were rich in docosahexaenoic acid (DHA). In addition, the microalgae associated with red tide, i.e., the raphidophytes, were found to be rich in fucoxanthin, β-sitosterol, and EPA, whereas dinoflagellates were rich in DHA. Seven bivalve species also contained high concentrations of fucosterol, EPA, and DHA, as did microalgae, which were used to feed by bivalves. These results are useful in selecting microalgae effectively as feed of the bivalves.  相似文献   

16.
Results from three larval Senegalese sole (Solea senegalensis) feeding trials using non-enriched Artemia and Artemia enriched with Super HUFA®, Arasco®, sunflower oil and microalgae are presented and the effects on larval survival, growth and fatty acid (FA) composition are reported. The FA profile of Senegalese sole eggs was analysed to gather information about the nutritional requirements of the early larval stages and a quite high DHA/EPA ratio (4.3) was found. However, there was no evidence of a high dietary demand for DHA or EPA, given that no relationship was found between dietary HUFA concentration and larval growth and survival. When larvae were fed non-enriched Artemia a significantly better growth and comparable survival were obtained than with Artemia enriched with Super HUFA® (containing the highest HUFA level and DHA/EPA ratio). The FA profiles of the larvae generally reflected those of their diets. DHA was an exception, as it was present in high proportions, even in larvae fed DHA-deficient prey. Total FAME concentration decreased during larval development, with SFA, MUFA and PUFA being equally consumed; HUFA appeared to be less used, with its relative concentration being either kept constant (particularly EPA and ARA) or increased (DHA). A specific requirement for ARA in the first larval stages could not be confirmed but it was always present in considerable amounts, even in larvae fed an ARA poor diet.  相似文献   

17.
  相似文献   

18.
This study represents a first report on the proximate composition and fatty acid profile of Lagocephalus sceleratus from the Mediterranean Sea as well as seasonal changes and sexual differences. Significant variations in the proximate composition were observed during the months of the study (p < 0.05). The highest moisture, fat, protein, and ash contents were found to be 78.47, 0.33, 21.62, and 1.63%, respectively. Total saturated and monounsaturated fatty acid values were similar throughout the year despite individual variations of 24.22–29.46 and 7.87–13.94%, respectively. However, significant variations were observed in total polyunsaturated fatty acids as well as significant differences between sexes (p < 0.05) with some exceptions. The major fatty acid was found as docosahexaenoic acid (DHA), between 24.17 and 32.65%. Due to the low fat content of this species, the highest eicosapentaenoic acid (EPA) + DHA values were calculated as 80.93 mg/100 g of edible muscle. The results indicated that this species contains high nutritional properties in terms of protein content and fatty acid values.  相似文献   

19.
We examined the effect of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) on the rates of abnormal morphology in juvenile brown sole Pseudopleuronectes herzensteini. Larvae during the D–E stages (15–24 days post hatching) were fed live food containing various amounts of DHA and/or EPA prepared using emulsified oils (DHA ethyl ester, EPA ethyl ester, and corn oil). Larvae during the F–I stages were fed Artemia enriched with a commercial diet supplement. We found that DHA and EPA promoted larval development and improved the incidence of morphological abnormalities in brown sole juveniles to a similar extent. However, DHA was more effective than EPA in preventing the appearance of morphological abnormalities in brown sole. The incidence of normal morphology was clearly improved by an increase of the DHA content in brown sole larvae at 25 days post-hatching. These results suggest that it is important to promote larval development and feed larvae with live food containing high levels of DHA during the D–E stages to prevent morphological abnormalities in brown sole juveniles.  相似文献   

20.
This study is the first attempt to condition broodstock Babylonia areolata using formulated diets under hatchery conditions. Samples of spotted babylon egg capsules from broodstock fed either a formulated diet or a local trash fish, carangid fish (Seleroides leptolepis) for 120 days were analyzed for proximate composition and fatty acid composition. The formulated diet contained significantly higher levels of arachidonic acid (20:4n − 6; ARA), eicosapentaenoic acid (20:5n − 3; EPA) and docosahexaenoic acid (22:6n − 3; DHA) than those of the local trash fish. The formulated diet also had significantly higher ratios of DHA/EPA and (n − 3)/(n − 6) PUFA than those of local trash fish but not for the ARA/EPA ratio. The compositions of egg capsules produced from broodstock fed formulated diet contained significantly more ARA, EPA and DHA compared to broodstock fed the local trash fish. The ARA/EPA and DHA/EPA ratios in egg capsules were significantly higher in the trash fish—fed group compared to those fed the formulated diet. However, (n − 3)/(n − 6) PUFA ratios in egg capsules produced from broodstock fed the formulated diet did not differ significantly compared to those from broodstock fed the local trash fish. The relatively low DHA/EPA, ARA/EPA and (n − 3)/(n − 6) ratios in the egg capsules produced from the formulated diet—fed broodstock B. areolata suggested that this diet is inferior, when compared to the traditional food of trash fish.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号