LUO Ming-Zhong, GUAN Rui-Zhang, JIN Heng. EFFECTS OF THE SALINITY ON THE GROWTH PERFORMANCE AND DIGESTIVE ENZYME ACTIVITIES OF ANGUILLA MARMORATA ELVER AND A. BICOLOR PACIFICA ELVER[J]. ACTA HYDROBIOLOGICA SINICA, 2015, 39(4): 653-660. DOI: 10.7541/2015.87
Citation: LUO Ming-Zhong, GUAN Rui-Zhang, JIN Heng. EFFECTS OF THE SALINITY ON THE GROWTH PERFORMANCE AND DIGESTIVE ENZYME ACTIVITIES OF ANGUILLA MARMORATA ELVER AND A. BICOLOR PACIFICA ELVER[J]. ACTA HYDROBIOLOGICA SINICA, 2015, 39(4): 653-660. DOI: 10.7541/2015.87

EFFECTS OF THE SALINITY ON THE GROWTH PERFORMANCE AND DIGESTIVE ENZYME ACTIVITIES OF ANGUILLA MARMORATA ELVER AND A. BICOLOR PACIFICA ELVER

  • Received Date: July 20, 2014
  • Rev Recd Date: December 11, 2014
  • Published Date: July 24, 2015
  • In this study, we investigated the effects of salinity on the growth and the activities of the digestive enzymes of Anguilla marmorata elver [body weight (9.76 0.36) g] and A. bicolor pacifica elver [body weight (11.82 0.04) g]. Subjects of the two species were cultured at four salinities (0, 5, 10 and 18) for 30 days. We first weighed all the eels in each tank, and then analyzed three types of digestive enzymes (protease, amylase and lipase) in three digestive organs (liver, stomach and intestine) of both species. The results showed that the survival rates of the two species were both 100% in all four salinities with no death case. In fresh water both species exhibited excellent growth performance, the highest specific growth rates (SGR), and the lowest food conversion ratios (FCR). The effects of salinity on the digestive enzyme activities were different between the two species. In the three digestive organs, the salinity did not significantly affect the activity of protease in A. marmorata elver (P0.05), but the increase in salinity caused reduced activities of amylase and lipase. For A. bicolor pacifica elver, the highest activity of protease in the stomach and the liver appeared at the salinities of 10 and 18 respectively; whereas the salinity did not affect the activities of amylase and lipase in the three digestive organs (P0.05). We deducted that saline water could inhibit the activities of amylase and lipase in the liver, the stomach and the intestine of A. marmorata elver, but might increase the protease activity of A. bicolor pacifica elver. At the same salinity the same digestive enzymes in different digestive organs showed different activities. For both species the activities of amylase and lipase in the intestine were significantly higher than in the liver and the stomach (P0.05); the activity of protease in the stomach was insignificantly higher than in the liver and the intestine (P0.05). Our study suggested that the high activity of lipase enabled A.marmorata elver and A. bicolor pacifica elver to digest fat efficiently. Therefore it may be suitable to increase the portion of the crude fat in the compounding feed, which could boost the digestion and absorption of nutrients and thus improve the quality of aquaculture.
  • [1]
    Guo Q D, Wang Y J, L W Q. Combined effects of temperature and salinity on the physiological osmotic induction and antioxidant responses in the juvenile Japanese flounder (Paralichthys olivaceus) [J]. Acta Hydrobiologica Sinica, 2014, 38(1): 5867 [郭勤单, 王有基, 吕为群. 温度和盐度对褐牙鲆幼鱼渗透生理及抗氧化水平的影响. 水生生物学报, 2014, 38(1): 5867]
    [2]
    Yan M J, Li Z J, Xiong B X. Food intake, growth and feed utilization of puffer fish (Takifugu fasciatus) after different salinity pretreatments [J]. Acta Hydrobiologica Sinica, 2005, 29(2): 142145 [严美姣, 李钟杰, 熊邦喜. 不同盐度预处理后Ⅰ龄暗纹东方鲀的摄食、生长和饲料利用. 水生生物学报, 2005, 29(2): 142145]
    [3]
    Eric E, Pierre E. Is salinity choice related to growth in juvenile eel Anguilla Anguilla [J]? Cybium, 2004, 28(suppl): 7782
    [4]
    Tzeng W N, Lizuka Y, Shiao J C, et al. Identification and growth rate comparison of divergent migratory contingents of Japanese eel (Anguilla japonica) [J]. Aquaculture, 2003, 216(1-4): 7786
    [5]
    Okamura A, Yamada Y, Mikawa N, et al. Growth and survival of eel leptocephali (Anguilla japonica) in low- salinity water [J]. Aquaculture, 2009, 296(34): 367372
    [6]
    Tian T, Yuan C G, Ruan C X. The study on variation of growth of Anguilla anguilla elver at different salinities [J]. Journal of Fujian Fisheries, 2006, 111(4): 6366 [田田, 袁重桂, 阮成旭. 欧鳗黑仔苗在不同盐度条件下生长效果的比较. 福建水产, 2006, 111(4): 6366]
    [7]
    Kearney M, Jeffs A, Lee P. Effects of salinity and temperature on the growth and survival of New Zealand shortfin, Anguilla australis, and longfin, A. dieffenbachii, glass eels [J]. Aquaculture Research, 2008, 39(16): 17691777
    [8]
    Jamandre B W D, Shen K N, Yambot A V, et al. Molecular phylogeny of Philippine freshwater eels Anguilla spp. (Actinopterygi: Anguilliformes: Anguillidae) inferred from mitochondrial DNA [J]. The Raffles Bulletin of Zoology, 2007, (suppl): 5159
    [9]
    Han Y S, Chang C W, He J T, et al. Validation of the occurrence of short-finned eel Anguilla bicolor pacifica in natural waters of Taiwan [J]. Acta Zoologica Taiwanica, 2001, 12(1): 919
    [10]
    Luo M Z, Guan R Z, Jin H. Effects of salinity on Na+/K+- ATPase activity in gill and kidney of Anguilla marmorata and A. bicolor pacifica elver [J]. Oceanologia et Limnologia Sinica, 2013, 44(3): 807813 [罗鸣钟, 关瑞章, 靳恒. 盐度对花鳗鲡(Anguilla marmorata) 和太平洋双色鳗鲡(A. bicolor pacifica) 幼鳗鳃丝及肾脏Na+/K+-ATP酶活力的影响. 海洋与湖沼, 2013, 44(3): 807813]
    [11]
    Yan M, Li Z, Xiong B, et al. Effects of salinity on food intake, growth, and survival of pufferfish (Fugu obscurus) [J]. Journal of Applied Ichthyology, 2004, 20(2): 146149
    [12]
    Tsuzukia M Y, Sugaib J K, Maciela J C, et al. Survival, growth and digestive enzyme activity of juveniles of the fat snook (Centropomus parallelus) reared at different salinities [J]. Aquaculture, 2007, 271(14): 319325
    [13]
    Bian P J, Qiu C G, Xu SL, et al. Effects of salinity on growth, activity of non-specific immune and antioxidant enzymes in obscure puffer Takifugu obscures [J]. Acta Hydrobiologica Sinica, 2014, 38(1): 108114 [边平江, 邱成功, 徐善良, 等. 盐度对暗纹东方鲀生长、非特异性免疫和抗氧化酶活力的影响. 水生生物学报, 2014, 38(1): 108114]
    [14]
    Conides A J, Glamuzina B. Laboratory simulation of the effects of environmental salinity on acclimation, feeding and growth of wild-caught juveniles of European sea bass Dicentrarchus labrax and gilthead sea bream, Sparus aurata [J]. Aquaculture, 2006, 256(14): 235245
    [15]
    Mylonas C C, Pavlidis M, Papandroulakis N, et al. Growth performance and osmoregulation in the shi drum (Umbrina cirrosa) adapted to different environmental salinities [J]. Aquaculture, 2009, 287(12): 203210
    [16]
    Liang Y J, Sun X J, Shi D J, et al. Effects of salinity on growth and flesh quality of Scortum barcoo [J]. Acta Hydrobiologica Sinica, 2010, 34(4): 880884 [梁拥军, 孙向军, 史东杰, 等. 盐度对高体革鯻生长和肉质的影响. 水生生物学报, 2010, 34(4): 880884]
    [17]
    Boeuf G, Payan P. How should salinity influence fish growth [J]? Comparative Biochemistry and Physiology part C, 2001, 130(4): 411423
    [18]
    Tian X L, Ren X W, Dong S L, et al. Studies on the specific activities of digestive enzymes of Cynoglossus semilaevis Gunther at different salinities and temperatures [J]. Periodical of Ocean University of China, 2008, 38(6): 895901 [田相利, 任晓伟, 董双林, 等. 温度和盐度对半滑舌鳎幼鱼消化酶活性的影响. 中国海洋大学学报, 2008, 38(6): 895901]
    [19]
    Chiu Y N, Benitez L V. Studies on the carbohydrates in the digestive tract of the milkfish Chanos chanos [J]. Marine Biology, 1981, 61(23): 247254
    [20]
    Tang B G, Chen G, Zhang J D, et al. Effects of pH, amylum concentration and temporary-keeping salinity on the activity of amylase in the digestive tract of Lautianus erythopterus [J]. Chinese Journal of Zoology, 2004, 39(2): 7073 [汤保贵, 陈刚, 张健东, 等. pH、底物浓度及暂养盐度对红鳍笛鲷消化道淀粉酶活力的影响. 动物学杂志, 2004, 39(2): 7073]
    [21]
    Hofer R, Schiemer F. Proteolytic activity in the digestive tract of several species of fish with different feeding habits [J]. Oecologia, 1981, 48(3): 342345
    [22]
    Huang Y C, Liu D. Preliminary study on the effect of temperature on proteases and amylases activities from different sizes European eel (Anguillia anguillia) [J]. Journal of Oceanography in Taiwan Strait, 2004, 23(2): 138143 [黄永春, 刘登. 温度对不同规格欧鳗消化器官蛋白酶和淀粉酶活性影响的初步研究. 台湾海峡, 2004, 23(2): 138143]

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