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1.
研究饲料中n-3HUFA对褐菖鲉(Sebastiscus marmoratus)血清生化指标、主要脂代谢酶活力以及抗氧化能力的影响。以鱼粉、豆粕、酪蛋白为蛋白源,不同比例鱼油与大豆油的混合油为脂肪源,配制n-3HUFA含量分别为0.36%、1.02%、1.82%、2.65%以及3.70%的5种饵料(依次编号为A、B、C、D和E)。实验选用平均初始体重为31.47±0.23 g的褐菖鲉幼鱼225 ind,随机分成5组(每组3个平行,每个平行15 ind),实验周期60 d。研究结果表明:(1)不同n-3HUFA含量的饲料对褐菖鲉血清中的总胆固醇(CHO)以及低密度脂蛋白(LDL-C)含量有显著的影响(P<0.05)。随着饲料中n-3HUFA含量的升高,褐菖鲉血清中的CHO以及LDL-C呈逐渐升高的趋势(P<0.05)。高密度脂蛋白(HDL-C)随饲料中n-3HUFA含量的升高呈现上升的趋势(P>0.05),血清甘油三酯(TG)含量在各组之间没有显著差异(P>0.05);(2)饲料n-3HUFA水平对肝脏脂肪酸合成酶的活力有显著影响,随着饲料中n-3HUFA含量的升高,褐菖鲉肝脏脂肪酸合成酶活力呈现逐渐上升的趋势(P<0.05),脂蛋白酶活力和肝酯酶活力虽均呈现上升趋势,但各组间没有显著差异(P>0.05);(3)饲料n-3HUFA水平对褐菖鲉肝脏丙二醛(MDA)以及总抗氧化能力(T-AOC)有显著的影响(P<0.05),肝脏超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活力随饲料中n-3HUFA水平的升高呈现上升的趋势(P>0.05),血清中SOD以及CAT活力随n-3HUFA水平升高呈逐渐上升趋势(P>0.05)。 相似文献
2.
尼罗罗非鱼幼鱼饲料的适宜脂肪需要 总被引：4，自引：1，他引：3
选用初始体质量为(46.14±4.67)g的尼罗罗非鱼(Oreochromis nilotica)360尾,随机分成6组(每组4重复,每重复15尾),分别饲喂添加鱼油水平为0%(对照组)、3%、6%、9%、12%和15%的纯化饲料(实测脂肪水平为0.20%、2.70%、6.11%、8.04%、11.13%和14.85%)。饲养8周后,以尼罗罗非鱼幼鱼的生长、体组成、血清生化及脂肪代谢酶活性等指标为判断依据,确定其饲料的脂肪需要量。结果表明,随饲料脂肪水平的升高,尼罗罗非鱼的增重率、特定生长率以及蛋白质效率均呈现先上升后下降的趋势,饲料系数呈现先下降后上升的趋势。饲料脂肪水平的升高使尼罗罗非鱼肝体比及全鱼和肌肉的脂肪含量显著增加(P<0.05)。随饲料脂肪水平的升高,尼罗罗非鱼血清总胆固醇和甘油三酯含量呈先上升后下降的趋势,各实验组显著高于对照组(P<0.05);血清高密度脂蛋白含量呈先上升后稳定的趋势;血清谷丙转氨酶和谷草转氨酶活性均在饲料脂肪水平为6.11%时最小,在14.85%时达到最大。随饲料脂肪水平的升高,尼罗罗非鱼脂蛋白酯酶、肝脂酶和肠道脂肪酶活性均呈先升高后下降的趋势,脂肪酸合成酶活性显著下降(P<0.05)。对增重率、蛋白质效率、饲料系数和血清高密度脂蛋白胆固醇进行回归分析得出,尼罗罗非鱼幼鱼饲料最适脂肪水平分别为8.86%,9.75%,9.40%和8.30%,因此确定尼罗罗非鱼幼鱼饲料适宜的脂肪需要量为8.30%～9.75%。 相似文献
3.
饲料脂肪水平对梭鱼脂肪沉积、脂肪代谢酶及抗氧化酶活性的影响 总被引：10，自引：5，他引：5
为了探讨饲料脂肪水平对梭鱼(Chelon haematocheilus)脂肪沉积、脂肪代谢酶及抗氧化酶活性的影响,选取360尾平均体质量为(5.4±0.2)g的梭鱼鱼种,随机分为6组,每组3个重复,每个重复20尾鱼,分别投喂脂肪含量为2.71%、5.79%、8.23%、11.85%、14.39%、16.91%的6组等氮饲料,饲养60 d,测定相应生物学指标及酶活。研究结果表明,随着脂肪水平的升高,肝体指数、脏体指数显著升高(P<0.05),肥满度8.23%组最大,其显著高于2.71%组(P<0.05);梭鱼全鱼、肝脂肪含量显著升高(P<0.05),14.39%组全鱼脂肪含量最高,16.91%组肝脂肪含量最高。饲料脂肪水平对肝脂肪代谢酶有显著影响(P<0.05),其中脂蛋白酯酶(LPL)、肝酯酶(HL)、总酯酶(GE)活性随着饲料脂肪水平的升高显著增高(P<0.05),16.91%组显著高于2.71%、5.79%、8.23%组(P<0.05);苹果酸脱氢酶活性呈显著下降趋势(P<0.05);血液中甘油三酯(TG)、总胆固醇(CHO)、游离脂肪酸(EFA)有升高趋势,但各组差异不显著(P>0.05);脂肪水平16.91%组高密度脂蛋白胆固醇(HDL)含量最高,显著高于脂肪水平2.71%的组(P<0.05);肝胰脏超氧化物歧化酶(SOD)活性随着饲料脂肪水平的升高呈先上升后下降的趋势,8.23%组活性最高,丙二醛(MDA)含量16.91%组显著高于其他5组(P<0.05)。结果显示,肝是梭鱼脂肪沉积的主要场所,肝脂肪沉积比肌肉更敏感,高脂肪饲料还使脂肪分解酶的活性增强,血脂含量增加;适宜的饲料脂肪水平可提高梭鱼的抗氧化能力,脂肪水平过高则会导致抗氧化能力下降。 相似文献
4.
本研究旨在评价核糖蛋白替代大菱鲆(Scophthalmus maximus)饲料中鱼粉的潜力。采用单因素实验设计,设6个鱼粉替代水平。对照饲料(D1)中鱼粉含量为45%,通过添加核糖蛋白替代D1组饲料中鱼粉的0.5%(D2)、1%(D3)、2%(D4)、3%(D5)和4%(D6)。实验期间,每天分2次按饱食量投喂初始体重为(24.00±0.30)g大菱鲆幼鱼56 d。结果显示,幼鱼增重率、特定生长率、蛋白质效率随着核糖蛋白替代水平的变化呈先上升后下降趋势,均在D3组达到最高值,显著高于D5和D6组(P<0.05);饲料系数则呈相反趋势,在D3组达到最低值,显著低于D6组(P<0.05)。各替代组幼鱼血清胰岛素生长因子(IGF-1)和生长激素(GH)含量均显著低于对照组(P<0.05);核糖蛋白替代1%~3%的鱼粉后,显著提高了幼鱼肠道胰蛋白酶活性(P<0.05);幼鱼肠道α-淀粉酶活性在D4和D5组显著高于对照组(P<0.05);饲料中添加核糖蛋白替代鱼粉显著降低了幼鱼肠道脂肪酶活性(P<0.05)。各替代组幼鱼血清总蛋白、球蛋白含量和碱性磷酸酶活性均显著高于对照组(P<0.05);D3组溶菌酶活性显著高于D6组(P<0.05);各组间幼鱼血清白蛋白含量和超氧化物歧化酶活性无显著差异(P>0.05),但各替代组均显著提高了幼鱼血清白介素β1(IL-1β)和肿瘤坏死因子(TNF-α)含量(P<0.05);与对照组相比,D4~D6组血清总胆固醇和甘油三酯含量显著降低(P<0.05),低密度脂蛋白在D5和D6组显著降低(P<0.05);高密度脂蛋白在D4组显著升高(P<0.05)。血糖浓度呈先升高后降低的趋势,D3组显著高于对照组(P<0.05)。攻毒实验结果显示,D2组大菱鲆幼鱼48 h累积死亡率最低为56.45%。研究表明,饲料中添加核糖蛋白替代1%鱼粉时,大菱鲆幼鱼生长、消化酶活力及鱼体的免疫能力和抗细菌感染能力均达到最高。 相似文献
5.
研究了不同脂肪水平饲料对褐菖鲉（Sebastiscusmarmoratus）生长、肠道消化酶及肝脏中主要脂代谢酶活力的影响,试验选用平均体质量为（27．56±0．19）g的褐菖鼬幼鱼225尾,随机分成5个组,分别投喂脂肪水平为6．1％、9．5％、12．4％、15．1％和18．5％的饲料,试验周期为60d。结果表明,1）褐菖铀的特定生长率和肥满度呈先升后降的趋势,在脂肪水平12．4％时达到最大（P〈0．05）,饵料系数则相反,呈先降后升的趋势,肝体指数随脂肪水平的升高而增大（P〈0．05）,成活率在各组问没有显著差异;2）鱼体肠道脂肪酶活力呈上升趋势（P〈0．05）,胃蛋白酶与淀粉酶活力在各组之间没有显著差异;3）褐菖鲉的脂肪酸合成酶活力呈先升后降的趋势（P〈0．05）,脂蛋白酶活力和肝酯酶活力也呈上升趋势,但各组间差异不显著。根据特定生长率与饲料脂肪水平的回归曲线计算得出,褐菖鲉幼鱼最适脂肪需求量为12．72％。 相似文献
6.
设置4个试验组(A、B、C、D)和1个对照组(E)，在不同的试验条件下，对巴马拟缨鱼进行人工催产，采用双抗体夹心法，测定样本鱼催产前后血清激素水平，试验周期365 d。结果表明，催产前，C组的雌二醇(E2)含量最高，较A组有显著提高(P<0.05)，与其他各组无显著差异(P>0.05);D组的雌三醇(E3)和睾酮(T)含量最高，各组间无显著差异(P>0.05);A组的孕酮(P)含量最高，组间差异不显著(P>0.05);B组雌酮(E1)含量最高，较A组和D组有显著提高(P<0.05)，与C组无显著差异(P>0.05)。催产后，A组E2含量上升，B、C、D组下降，且C组催产前后差异显著(P<0.05);A、B组E3含量均上升，其中B组催产前后差异显著(P<0.05),C、D组下降，催产前后差异不显著；A、B组P含量下降，而C、D组上升，催产前后差异不显著(P>0.05);A、B组E1含量下降，A组催产前后差... 相似文献
7.
本实验以大菱鲆(Scophthalmus maximus)幼鱼[(39.69±0.25) g]为研究对象,探究由裂壶藻(Schizochytrium sp.)和拟微绿球藻(Nannochloropsis sp.)组成的混合微藻替代鱼油对幼鱼生长性能、体组成、肠道消化水平及抗氧化能力的影响,以确定混合微藻替代鱼油的适宜比例。通过在基础饲料中添加不同比例的混合微藻,分别替代0、25%、50%和100%的鱼油,制成4组等氮等脂的实验饲料(分别命名为D1、D2、D3和D4),每组饲料设3个重复,实验周期为12周。结果显示,随替代比例的提高,大菱鲆幼鱼的增重率(WGR)和饲料效率(FE)呈下降趋势,D1、D2和D3组的特定生长率(SGR)和FE无显著性差异,但均显著高于D4组(P<0.05);肝体比(HSI)在D1组达到最大值,且显著高于其他各组(P<0.05);存活率(SR)和肥满度(CF)在各组之间无显著差异(P>0.05)。随着混合微藻替代鱼油比例的升高,全鱼和肌肉粗脂肪含量呈先升高后降低的变化趋势,且D4组显著低于D1组(P<0.05);大菱鲆幼鱼鱼体中C20:4n-6和n-6 PUFA含量显著升高,在D4组均达到最大值,且显著高于对照组(P<0.05)。而EPA、DHA和n-3 PUFA含量随之显著下降,对照组(D1)含量显著高于其他各组(P<0.05);肌肉中C20:4n-6和DHA含量在不同实验组间无显著性差异(P>0.05),EPA和n-3 PUFA含量呈显著降低趋势(P<0.05)。肠道脂肪酶活力在D3组达到最大值,显著高于对照组(P<0.05),肠道胰蛋白酶活力也是在D3组最高,但与对照组无显著性差异(P>0.05)。与D1组相比,D3组肠道中酸性磷酸酶(ACP)、碱性磷酸酶(AKP)、溶菌酶(LZM)活力和补体C3含量均显著升高(P<0.05)。肠道中超氧化物歧化酶(SOD)、总抗氧化能力(T-AOC)和过氧化氢酶(CAT)活力随替代比例的提高呈先升高后降低的趋势,均在D3组达到最大值,显著高于D1组(P<0.05),而肠道中丙二醛(MDA)含量在不同实验组间并未表现出显著性差异(P>0.05)。综上所述,混合微藻替代50%的鱼油并不会对大菱鲆幼鱼的生长性能产生负面影响,同时可以提高肠道的消化性能、抗氧化能力和非特异性免疫能力。 相似文献
8.
为研究34 ℃水温下吉富罗非鱼对饲料脂肪的需求量,选用初始体质量为(50.88±1.57) g的吉富罗非鱼360尾,随机分成6组(每组设3个重复,每重复20尾),饲喂脂肪含量分别为0.22%(对照组)、2.83%、4.98%、7.45%、9.23%和12.47%的6种纯化饲料,在34 ℃水温下饲养56 d后,测定并分析了吉富罗非鱼的生长性能、体成分、部分血清生化和肝脏脂肪代谢酶活性等指标。结果显示,随饲料脂肪水平升高,吉富罗非鱼增重率、特定生长率、蛋白质效率与蛋白质保留率均呈现先上升后下降的趋势,饲料系数和摄食率呈现相反的趋势;12.47%实验组肝体比显著高于其他实验组,其他指标组间无显著性差异。饲料脂肪水平对吉富罗非鱼的成活率无显著影响。对照组全鱼粗脂肪含量显著低于其他实验组;当饲料脂肪含量为7.45%~12.47%时,肌肉粗脂肪含量显著高于对照组;肝脏粗脂肪含量在饲料脂肪含量为2.83%~9.23%时较对照组显著降低。血清甘油三酯和总胆固醇随饲料脂肪水平升高呈现先下降后上升的趋势;肝脏脂肪酶和脂蛋白酯酶活性随脂肪水平的增加呈上升趋势,在12.47%组达到最大值;肝脂酶的活性呈先上升再下降最后趋于稳定的趋势,在脂肪水平为2.83%时最高, 显著高于其他各组。经回归分析,在34 ℃水温下,吉富罗非鱼要获得最佳的增重率、蛋白质效率和最低饲料系数对饲料脂肪的需求量分别为4.92%、5.67%和6.49%。 相似文献
9.
以初始体重为(214.5±1.0)g的鲈鱼为研究对象,通过在基础饲料中添加亚硒酸钠0、0.48、0.97、1.45、1.93、2.42 mg/kg配成不同水平硒(0.12、0.36、0.42、0.60、0.78、1.10 mg/kg)的6组等氮等脂饲料,在海水浮式网箱进行为期70 d的生长实验,探讨饲料中不同水平的硒对鲈鱼生长、饲料利用、抗氧化酶活力和鱼体硒含量的影响。研究表明,特定生长率随着饲料中硒水平的增加呈先上升后平稳的趋势,在饲料中硒水平为0.60 mg/kg时,特定生长率最高;饲料中不同水平的硒对鲈鱼存活率和饲料效率无显著差异(P>0.05);肝脏和血清中的谷胱甘肽过氧化物酶(GSH-Px)活性随着饲料硒水平的提高而呈现出先升高后降低的趋势,在饲料硒含量为0.60 mg/kg时达到最大值;血清和肝脏谷胱甘肽转移酶(GST)活性随着硒含量的增加呈现出先上升后平缓的趋势,在饲料中硒含量为0.78 mg/kg时,血清GST活性显著高于对照组(P<0.05);血清谷胱甘肽还原酶(GR)活性随着硒含量的增加呈现先上升后平缓的趋势,在饲料中硒含量为0.78 mg/kg时,血清GR活性显著高于对照组(P<0.05);血清中超氧化物歧化酶(SOD)活性随着饲料硒含量的升高呈现出先升高后下降的趋势,在饲料中硒含量为0.60 mg/kg时达到最大值,硒含量为1.10 mg/kg时,血清中SOD活性显著下降且低于对照组饲料(P<0.05);随着饲料硒含量的升高,血清中丙二醛含量呈现出先降低而后升高的趋势,其中在饲料中硒含量为0.60 mg/kg时最低;全鱼和肝脏中硒含量随着饲料中硒水平的升高而显著升高(P<0.05)。综合生长和抗氧化能力,建议214 g规格的鲈鱼饲料中适宜的硒含量为0.63-0.75 mg/kg。 相似文献
10.
本实验旨在研究生长中期鲈鱼对饲料L-异亮氨酸的需要量。选取初始体重159.33±1.20g的鲈鱼为实验对象,在基础饲料中梯度添加晶体L-异亮氨酸,配制出异亮氨酸实测含量分别为0.72%、1.11%、1.53%、1.93%、2.31%和2.72%的6种饲料,在海水浮式网箱中进行10周养殖实验。实验结果表明,随饲料中L-异亮氨酸含量的升高,鲈鱼增重率(WGR)、饲料效率(FER)及蛋白质沉积率(PPV)均呈现先上升后下降的趋势,各组间差异显著(P<0.05),且在1.93%L-异亮氨酸饲料组出现最大值,分别为108.55%、0.89、和37.57%。饲料中L-异亮氨酸含量对存活率(SR)、摄食率(FI)、肝体比(HSI)、脏体比(VSI)、肥满度(CF)、体组成和肌肉氨基酸组成均无显著影响(P>0.05)。肝脏谷草转氨酶(GOT)、谷丙转氨酶(GPT)活力随饲料中L-异亮氨酸含量的升高呈现先上升后下降的趋势,各组间差异显著(P<0.05)。饲料中L-异亮氨酸含量对血清甘油三酯(TG)含量有显著影响(P<0.05),在L-异亮氨酸含量为1.93%时达到最大值,显著高于0.72%和1.11%组(P<0.05),但与其它各组差异不显著(P>0.05)。饲料中L-异亮氨酸含量对血清谷草转氨酶(GOT)、谷丙转氨酶(GPT)活力、血清总胆固醇(TC)含量无显著影响(P>0.05)。以增重率(WGR)和蛋白质沉积率(PPV)为评价指标,得出生长中期鲈鱼对饲料中L-异亮氨酸的需求量分别为1.88%和1.84%饲料干重,占饲料蛋白质的4.41%和4.32%。 相似文献
11.
《Journal Of Aquatic Food Product Technology》2013,22(4):61-70
No abstract available for this article. 相似文献
12.
Shun Watanabe Jun Aoyama Seishi Hagihara Bunpei Ai Rhodora V. Azanza Katsumi Tsukamoto 《Fisheries Science》2013,79(3):375-383
Anguilla luzonensis and A. huangi were each described in 2009 using eels obtained from northern Luzon Island. We examined the taxonomic status of these two groups of eels using morphological and molecular genetic characters. There were no significant differences in two vertebrae counts between eels of A. luzonensis and A. huangi. Mitochondrial 16S ribosomal RNA and cytochrome b genes sequences were obtained and compared among 28 specimens of A. luzonensis, the holotypes of A. luzonensis and A. huangi, and one specimen of the other 15 anguillid species. The specimens of A. luzonensis exhibited almost identical sequences, including the holotype, with only a few site differences, and the genetic difference between the holotypes of A. luzonensis and A. huangi was within the range of differences of specimens of A. luzonensis. The other anguillid species were genetically very different from A. luzonensis and A. huangi, although A. interioris is a closely related species. It is clear that A. luzonensis and A. huangi are the same species, and according to the principle of priority in zoological nomenclature, A. luzonensis Watanabe, Aoyama, and Tsukamoto, 2009 is the valid species name, and A. huangi Teng, Lin, and Tzeng, 2009 is a junior synonym of A. luzonensis. 相似文献
13.
The effects of exposing the eggs of Pacific threadfin and amberjack eggs (AEs) to different concentrations of hydrogen peroxide for 5 min on hatch rate and survival were assessed in a series of experiments using a petri dish model rearing system. Despite significant inter‐batch variation in hatch rate, it was shown that eggs of both species could be safely exposed to up to 11 340 mg L−1 H2O2 for 5 min. Exposure to 34 230 mg L−1 H2O2 for 5 min was shown to be lethal to AEs at a late stage of development. In two further experiments, it was demonstrated that Pacific threadfin eggs were resistant to all tested concentrations of a range of polyvinylpyrrolidone iodine (PVP‐I) concentrations and contact times (up to 1000 mg L−1 PVP‐I for 10 min). The level of bacteria adhering to the eggs of both species was highly variable. Where eggs were heavily colonized (>104 cfu egg−1), hydrogen peroxide concentrations of at least 11 340 mg L−1, or PVP‐I concentrations higher than 500 mg L−1 for 10 min, were required for effective sterilization. In less colonized batches, rinsing in sterile seawater or exposure to lower (550 mg L−1) concentrations of H2O2 was sufficient to result in high apparent levels of surface sterility (<1 cfu egg−1). 相似文献
14.
Mulloway (Argyrosomus japonicus) occur in estuarine and coastal waters surrounding Australia, Africa, India, Pakistan, China, Korea and Japan, where they are important in fisheries. This study identified that mulloway in south-eastern Australia had similar growth rates, but matured at smaller lengths and younger ages, to those in South Africa and Western Australia. Growth of both sexes was similar to about 5 years, after which females grew faster and attained a greater maximum length than males. Female mulloway matured at 4–5 years of age with a L50 of 68 cm, whereas males matured at 2–3 years of age with a L50 of 51 cm. The commercial fishery in New South Wales was characterised by declining catches and a reduction in the proportion of mulloway of mature lengths in landings. During 2002–2005 commercial landings were dominated (83%) by fish within 15 cm of the current minimum legal total length of 45 cm and aged 2 and 3 years (>80%), even though mulloway can attain lengths of 200 cm and live >30 years. Estimates of the rates of instantaneous total mortality ranged between 0.34 and 0.45, whilst the rate of instantaneous natural mortality (M) was estimated to be approximately 0.12. Yield-per-recruit analyses indicated that mulloway in New South Wales are being growth overfished and substantial increases in yield could be achieved by increasing the length at first harvest. Values of the spawning potential ratio were below 0.2 under a range of mortality estimates, suggesting that mulloway are at risk of recruitment overfishing. These results suggest that the spawning stock of mulloway in south-eastern Australia has been depleted and that remedial management action is required to protect this iconic species. 相似文献
15.
16.
对驼背鲈(Chromileptes altivelis)的胚胎发育及仔、稚、幼鱼的形态特征进行了详细的观察与研究,描述了从受精卵到仔、稚、幼鱼各发育期的时间和形态特征变化。结果表明,在水温25-26℃、盐度30的海水中,受精卵历时27 h 25 min完成整个胚胎发育过程,经历从卵裂、囊胚、原肠、神经胚到肌节形成、各器官的逐渐形成、变化、完善等一系列的胚胎发育和变化过程;根据其卵黄囊消长情况、鳞片的覆盖状态、体色发生的不同变化以及第二背鳍和腹鳍的消长,将胚后发育分为仔、稚、幼鱼3个阶段。在水温22-26℃、盐度29-31、DO≥5 mg/L的条件下,2-3 d仔鱼卵黄囊消失,开口摄食;生长发育至31 d,仔鱼已变态进入稚鱼期;培育至57 d,稚鱼完成变态,成为幼鱼。第二背鳍棘和腹鳍棘的生长与收缩等石斑鱼类早期发育的共性生长特征及其体表特性体色变化特征为驼背鲈胚后发育过程中最明显的特征。 相似文献
17.
Cludio C. Maretti Adriana R. Leo Ana Paula Prates Eliane Simes Ricardo B.A. Silva Ktia T. Ribeiro Leonardo Geluda Manoel S. Sampaio Fernanda F.C. Marques Anna C. Lobo Luís H. de Lima Leonardo M. Pacheco Warwick A. Manfrinato Antnio Q. Lezama Matheus T.P. Couto Paula M. Pereira Moara M. Giasson Paulo H.M. Carneiro Aldízio L. de Oliveira Filho Bernardo F.A. Brito Maurício S. Pompeu Guilherme F. Dutra Mara C. Nottingham Giovanna Palazzi Fabiana O. Hessel Andr L. Lima Bruna De Vita S. Santos Rodrigo Medeiros Marcelo M. Oliveira Mauro O. Pires Mnica Assad Mariana G. Pereira Marcelo R. Kinouchi Rosana J. Subir 《水产资源保护:海洋与淡水生态系统》2019,29(Z2):44-70
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18.
Charles C. Mischke Matt J. Griffin Terrence E. Greenway David Wise 《Journal of the World Aquaculture Society》2013,44(2):288-292
Mosquitofish, Gambusia sp., have been spread throughout the world to biologically control mosquitoes. However, the fish has gained a reputation as an invasive species and has been implicated in displacing native aquatic species. Gambusia affinis are native to the southeastern United States and commonly occur in commercial channel catfish, Ictalurus punctatus, production ponds. We investigated effects of mosquitofish presence on zooplankton populations, water quality, disease occurrence, and fish production in experimental ponds. There were no differences between ponds with or without mosquitofish in numbers of calanoid copepods, cyclopoid copepods, total copepods, Bosmina sp., Ceriodaphnia sp., Moina sp., Daphnia sp., or total cladocerans. There were also no differences in copepod and cladoceran sizes. Copepod nauplii were more numerous during the summer months in ponds with mosquitofish. There were no differences in water quality variables (soluble reactive phosphorus, nitrate, nitrite, ammonia, total nitrogen, total phosphorus, pH) or phytoplankton density between ponds stocked with and without mosquitofish. Catfish production and disease occurrence were also similar between ponds with and without mosquitofish. Although mosquitofish may cause problems when stocked outside their native range, there does not appear to be any adverse effects of mosquitofish presence in catfish production ponds. 相似文献
19.
D. K. Rowe 《Fisheries Management and Ecology》1999,6(5):377-386
Adult common bullies, Gobiomorphus cotidianus McDowall, are small (total length = 30–120 mm), benthic fish commonly found in the littoral zones of New Zealand lakes where they are a major prey species for trout and eels. Differences in their relative abundance (CPUE) were determined between 21 shallow North Island lakes. Mean CPUE ranged from 2 to > 1000 fish net− 1 night− 1 and was inversely related to water transparency. The abundance of bullies was not reduced in lakes containing rainbow trout, Oncorhynchus mykiss (Walbaum), but was reduced in all lakes containing self-recruiting populations of eels, Anguilla spp. Mean densities of planktonic larval bullies in the limnetic zone were also inversely related to water transparency. Since low water transparency is related to increased trophic status for these lakes, the abundance of bullies is likely to be related to lake productivity, rather than turbidity. 相似文献
20.
《Journal Of Aquatic Food Product Technology》2013,22(4):71-80
No abstract available for this article. 相似文献