热废水对大亚湾三种经济鱼类热效应的研究     

蔡泽平  陈浩如  金启增  练健生 《热带海洋学报》1999,18(2)

对大亚湾3种重要经济鱼类包括黑鲷Sparusmacrocephalus、平鲷Rhabdosargussarba和细鳞Theraponjarbua的多项温度指标进行室内热效应模拟研究。结果表明：在驯化温度为25—33℃条件下,黑鲷、平鲷和细鳞3种鱼类的起始致死温度分别为34．96─36．42,34．78─35.62,38．75─39.39℃;最高起始致死温度分别为36.35,35.52℃和39.32℃;临界热最大值分别为38．08─40.50,38．28─40.40℃和42.40─43.64℃;最适生长温度分别为28,28℃和32℃;生长的最高周平均温度分别为30．78,30.51℃和34．44℃;短期暴露最高温度分别为34.04,33.57℃和37．90℃。根据黑鲷、平鲷和细鳞的多项温度指标,结合这些鱼类的生活习性分析和大亚湾基本环境特征的调查资料,就大亚湾核电站温排水对渔业资源影响的热效应问题进行初步探讨。  相似文献   

Patterns of RNA/DNA ratios in larval fish and their relationship to survival in the field   总被引：1，自引：1，他引：0  

Pepin  P.; Evans  G. T.; Shears  T. H. 《ICES Journal of Marine Science》1999,56(5):697-706

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Fish movement vectors and the temperature gradient: A geometric analysis method for the depth-temperature time series from data storage tags   总被引：1，自引：0，他引：1  

Stensholt  E.; Stensholt  B. K. 《ICES Journal of Marine Science》1999,56(4):537-544

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Spatial and diurnal distribution of invertebrate and fish fauna of a Zostera marina bed and nearby unvegetated sediments in Damariscotta River, Maine (USA)     

Johanna Mattila  Glen Chaplin  Michele R. Eilers  Kenneth L. Heck Jr.  Jonathan P. O'Neal  John F. Valentine 《Journal of Sea Research》1999,41(4):209

Fish, epibenthos and macroinfauna were collected in a Zostera marina bed and nearby unvegetated sediments in the estuary of the Damariscotta River, on the mid-coast of Maine. Samples of epibenthic fauna and fish were collected at low tides both during day and night, and samples of infauna at low tides during the day. The mean density of Zostera shoots in the study area was 335 m⁻². Abundance and species number of fish were greater at night than during the day and greater in eelgrass beds (Z. marina) than in unvegetated habitats. Daytime fish collections were dominated by Atlantic silversides (Medinia medinia), while juvenile winter flounder (Pseudopleuronectes americanus) dominated night collections. Also Zostera-associated epifaunal abundances and number of species were significantly higher at night than during the day. Mysis stenolepis, Idotea balthica and Littorina obtusata were dominant species in the epifauna samples. Of the total of 37 invertebrate species encountered, only five occurred both in the infaunal and epifaunal samples. Nineteen different taxa were collected from the benthic core samples. The most abundant invertebrate infaunal taxa were sipunculids, the polychaete Nereis virens, and oligochaetes. Infaunal invertebrate abundances and species diversity were significantly higher in eelgrass beds than in unvegetated sediments. The abundance and number of species of benthic invertebrates were also positively correlated to seagrass biomass. Community diversity values (H′) were relatively low but fit well in the general pattern of decreasing diversity towards northern latitudes.  相似文献   

两种珍稀鱼类的形态学和生态学的补充研究     

武云飞  门强  康斌 《中国海洋大学学报(自然科学版)》1999,(4)

通过形态学比较研究和饲养生态学的观察,作者补充了细刺鱼牙齿结构特征和条石鲷的体色、鳍色的形态学特点,探讨了这两种鱼类的生态习性和１９９８ 年在青岛海域出现的原因。进行２～３ 个月的饲养实验后,得到细刺鱼月均增长量为１０．３％ ,条石鲷为１４．６％ 而明显高于同池饲养六线鱼的结果。鉴于两种鱼类彩色艳丽、游姿优美,具观赏价值,为此建议可将这两种鱼作为海水养殖或观赏鱼类的实验对象  相似文献   

以哈维氏弧菌(Vibrio harveyi)为重点的鱼类细菌病原的诊断与控制(英文)   总被引：2，自引：0，他引：2  

Ｂ．Ａｕｓｔｉｎ  Ｄ．Ａ．Ａｕｓｔｉｎ  Ｚ．Ｆａｒｈａｔ  Ｐ．Ａ．Ｗ．Ｒｏｂｅｒｔｓｏｎ 《中国海洋大学学报(自然科学版)》1999,(3)

作者对鱼类细菌病原的诊断与控制作了较全面的综述。细菌病原诊断技术包括酶联免疫吸附技术（ＥＬＩＳＡ）及蛋白印迹法（Ｗｅｓｔｅｒｎｂｌｏｔｉｎｇ）。细菌病原控制技术包括化学疗剂的应用,有益微生物的应用,营养添加剂,β－葡萄糖苷增强免疫抗病力,及免疫保护作用等。  相似文献   

溶解氧对低洼盐碱地鱼塘物质循环的影响   总被引：1，自引：0，他引：1  

高光  胡文英  李宽意 《湖泊科学》2003,15(1):57-63

对黄淮海平原低洼盐碱地鱼塘中溶解氧与物质循环之间的关系进行了初步研究. 结果表明池塘水体中的溶解氧含量取决于水体中藻类的光合作用及其它生物的耗氧作用扰动的方式时间可显著改变水体中溶解氧的含量. 池塘水体中异养细菌的数量变动除与水体中的有机物质含量等有关外与水体中溶解氧的含量密切相关. 尤其在底泥中这种变化更加明显. 池塘水体中的氨化作用强度磷的转化强度明显地呈现出受水体中的溶解氧含量影响. 当水体中的溶解氧含量增加时导致细菌的现存量及活性的增加使得氨化作用强度磷的转化强度也显著增加这种情况在底泥中表现的更加明显. 池塘水体中反硝化作用强度反硫化作用强度的变化则与水体中溶解氧含量的变化相反. 当水体中溶解氧的含量减少时水体中的反硝化作用强度反硫化作用强度反而大大增加. 这种作用在底泥中表现得也非常明显.  相似文献   

鲁西北地区鱼塘水体反射率   总被引：2，自引：2，他引：0  

孙志方 《湖泊科学》1996,8(3):222-228

太阳短波辐射反射率与水体理化特性关系密切,鱼塘水体除具有一般水体反射率特性外,还与鱼塘澡浮游植物一道量存在的良好的负相关。在一定温度条件下,浮游植物的生长速度与光合有效辐射呈正相关,而随着浮游植物的增加,又降低了太阳辐射的反射效应,从而水体对光合有效辐射的吸收,随着浮游植物的增加而增加。  相似文献   

两种沉水植物对黄颡鱼(Pseudobagrus fulvidraco)夏花培育水体主要水质因子的影响   总被引：2，自引：0，他引：2  

刘鑫  王哲  张一  柳光宇  黄诚 《湖泊科学》2003,15(2):184-188

以黄颡鱼夏花培育水体为实验用养殖污水,伊乐藻、轮叶黑藻作为净化水质的沉水植物材料,建立封闭型(非换水)和交换型(定期换水)的两种鱼草共生的生态系统并与传统的商业性养殖系统模式作同步比较,分析了养鱼水体水质主要因子的变化及对鱼存活率的影响．实验结果如下：1．作为实验组的鱼草共生系统两种水体水质优良,鱼类生长良好,交换型水体中D0值≥8．0,NH4—N≤0．34,COD≤18mg/L,悬浮物≤12mg/L夏花成活率为93．3％;封闭型水体中D0值≥7．5,总NH4—N≤0.92,COD≤28mg/L,悬浮物毒20mg/L夏花成活率为60．0%．2．作为对照组有色无草的封闭系统中水质逐渐恶化,鱼类生长受到抑制甚至生存也不能保障,其中,D0值≥2．5,NH4-N≤3.22,COD≤88mg/L,悬浮物≤55mg/L,夏花成活率仅为6．7％;交换系统中D0值≥4．0,总NH4—N≤2．41,COD≤66mg/L,悬浮物≤51mg/L,即使定期换水夏花成活率也仅达66．7％;研究结果表明：鱼草共生系统中栽培伊乐藻、轮叶黑藻等沉水植物可有效地净化水质,不仅确保了夏花生产良性运行,还节约了水资源并达到无污染排放．  相似文献   

尼泊尔波哈拉谷地若干湖泊的营养状况：过去、现在与将来     

Ash Kumar Rai 《湖泊科学》1998,10(S1):181-201

Harnessing the natural resources is one of the basis of natural economy in developing countries. The wise use of such resources is very important to sustain the balance between immediate benefits and maintenance of the ecosystem. In Phewa, Begnas and Rupa lakes of Pokhara Valley, plankton feeding fish farming in net cage,enclosure and open water stocking is one of the effective example of natural resources utilisation which sustains a number of households in surrounding lakes for economic activities. These lakes are also used for drinking water, hydroelectricity, irrigation and recreation etc. However, the understanding of trophic status of the lakes is very important for long term sustainable use of the lakes in harmony with human activities. Here, we present the trophic status of three lakes of Pokhara Valley and discuss the impacts of human and natural activities on the trophic status of the lake. The study shows that heavy rain fall in the valley during monsoon is one of the strongest natural forces which flush out the accumulated nutrients from the lakes and migrate the eutrophication processes. Recommendations for sustainable use of lake water have also been discussed.  相似文献