青岛鳌山湾海区营养结构分析与营养状况评价     

丁喜桂  叶思源  高宗军 《广东海洋大学学报》2006,26(1):22-26

根据2004年6月中旬在鳌山湾海区所取得的底层海水营养盐资料,分析了青岛鳌山湾海区营养盐的平面分布特征;运用绝对限制法则和相对限制法则确定了鳌山湾海区的营养盐限制因子;采用营养状态综合指数法和分类分级富营养化评价模式对鳌山湾海域的营养状况进行了评价。结果表明:鳌山湾营养盐限制因子为磷(P),该海区由缺氮转变为缺磷,营养盐结构发生了根本性变化,且该海域无富营养化现象,水质较好。  相似文献   

Phytoplankton Assemblage of Yangtze River Estuary and the Adjacent East China Sea in Summer, 2004   总被引：6，自引：0，他引：6  

Luan Qingshan  Sun Jun  Shen Zhiliang  Song Shuqun  Wang Min 《中国海洋大学学报(英文版)》2006,5(2):123-131

A cruise was conducted from late August to early September 2004 with the intention of obtaining an interdisciplinary understanding of the Yangtze River Estuary including the biological, chemical and physical subjects. Water sample analysis indicated that total phytoplankton species richness was 137. Of them 81 were found in Bacillariophyta and 48 in Pyrrophyta, accounting for 59.1% and 35.0% respectively. The average cell abundance of surface water samples was 8.8×104 cells L-1, with the maximum, 102.9×104 cells L-1, encountered in the area (31.75°N, 122.33°E) and the minimum, 0.2×104 cells L-1, in (30.75°N, 122.17°E). The dominant species at most stations were Skeletonema costatum and Proboscia alata f. gracillima with the dominance of 0.35 and 0.27. Vertical distribution analysis indicated that obvious stratification of cell abundance and dominant species was found in the representative stations of 5, 18 and 33. Shannon-Wiener index and evenness of phytoplankton assemblage presented negative correlation with the cell abundance, with the optimum appearing in (30.75°N, 122.67°E). According to the PCA analysis of the environmental variables, elevated nutrients of nitrate, silicate and phosphate through river discharge were mainly responsible for the phytoplankton bloom in this area.  相似文献   

短蛸不同组织的营养成分分析与评价     

张伟伟  雷晓凌 《广东海洋大学学报》2006,26(4):91-93

短蛸Octopus ochellatus隶属于头足纲(Cepha-lopode)蛸科(Octopodinae),主要分布于渤海、黄海、东海、南海等海域,它肉嫩味鲜美,具有催乳,治疗贫血、产后血虚、疽肿毒,防治宫颈癌等功效,是我国章鱼中最重要的经济种类。目前尚未见关于短蛸营养评价详细的报道,本文对湛江产鲜短蛸的肌肉、消化腺、生殖腺的主要营养成分、氨基酸及肌肉的脂肪酸组成进行了测定与营养评价,旨在从营养学方面对其功效进行解释。1材料与方法1.1原料短蛸购自湛江东风市场,为鲜活章鱼(2005年1月)。剖开后分为肌肉(胴体和腕部)、消化腺和生殖腺,分别于-18℃下冻存备…  相似文献   

斑Fu几种常见天然饵料的营养分析与评价   总被引：1，自引：0，他引：1  

杨家坚  林勇等 《广东海洋大学学报》2001,21(2):19-22

从饵料营养测试分析入手，化学和生物学方法相结合，综合评价，斑Fu几种常见天然饵料的营养价值，结果表明，水蚤、水蚯蚓、野杂鱼均是斑Fu优质的饲料蛋白源及良好的能源物质；三种饵料的第一限制氨基酸同为蛋氨酸、第二限制氨基酸为赖氨酸：斑Fu苗种培育效果比较，水蚤组显著优于水丘蚓和野杂鱼组，而后两组间无显著差异。  相似文献   

IMPACT OF STARVATION ON SURVIVAL，MEAT CONDITION AND METABOLISM OF CHLAMYS FARRERI     

杨红生 王健周毅  王萍何义朝  张福绥 《中国海洋湖沼学报》2001,19(1):51-56

The effects of 60-day starvation on survival rate. condition index (CI) , changes ofnutrient composition of different tissues, respiration and excretion of scallop ChlartnCs farreri were studiedin laboratory from Oct. 17 to Dec. 15 ,1997. Two groups (control and starvation with 200 individualseach) were cultured in two 2 m3 tanks, with 31 to 32 salinity water at 1 7 “C . Starvation effects were mea-sured alter 1 0, 20, 40 and 60 days. There was no mass mortality of scallops cf the two tanks and survivalrates of the control and starvation groups were 93 .5 % and 92.0 %, respectively. Starvation had strongeffect on the meat condition of the scallops, especially after 10 days; when relative lipid percentagedropped sharply while relative protein percentage increased. The impact of starvation on the oxygen consumption mtc (OCR) and the ammonia-N cxcretion mtc (AER) was obvious.  相似文献   

红海湾水域营养水平的时空变化特点与评价     

蔡文贵  贾晓平  林钦  李纯厚 《广东海洋大学学报》2001,21(3):19-23

根据1997年8月～1998年11月的调查数据,本文分析和评价了红海湾4个不同水域营养水平的时空分布特点.红海湾水域E值的空间分布从北向南呈逐渐递减的趋势,即长沙湾滩涂养殖区＞长沙湾浅海养殖区＞自然水域、龟龄岛水域,其中长沙湾滩涂养殖区和长沙湾浅海养殖区有机污染十分明显,达高富营养化程度和富营养化程度,自然水域和龟龄岛水域则营养状况相似,基本上未受到明显的有机污染.E值的季节变化趋势为春季＞秋季＞夏季＞冬季,除冬季处于贫营养状况外,其余3个季节均达富营养化程度,其中以春季有机污染最为严重,达高富营养化程度.  相似文献   

小偃54小麦的抗逆性表现     

陈海莲王剑环  王新芳祝忠毅 《河南气象》2005,(2):28-30

小偃54是一个具有杂种优势、品质优良的小麦品种。通过在豫南试种、示范及对其生理机制探讨发现：它有发达的根系，可在逆境中充分吸收营养、水分等，以满足自身营养需要和加大蒸发量，以调解渍水及旱灾条件下的生理功能和提高抵御病、旱、涝、倒伏等自然灾害的抗逆能力；具有旗叶中等、旗叶上挺的特征，因此通风透光较好，冠层温度较低，具有较高的抗干热风能力。此外，它是蛋白质含量很高的优质小麦，又是氮高效基因型，既能在逆境胁迫下充分吸收营养，又能用自身能量维护渍水条件下的生存需要，同时它又是属于高效低营养基因型。尤其适合在低磷协迫下利用其自身遗传生理特性去活化吸收营养，调解抗逆能力，获得较高产量。  相似文献   

AAssessment of the spatial-temporal eutrophic character in the Lake Dianchi     

XINGKexia GUOHuaicheng SUNYanfeng HUANGYongtai 《地理学报(英文版)》2005,15(1):37-43

Water-quality deterioration and eutrophication of the Lake Dianchi have acquired more and more attention in the last few decades. In this paper, the spatial and temporal eutrophication status of the Lake Dianchi was assessed. The comprehensive trophic state index was chosen to assess the trophic status of the Lake Dianchi in the past 13 years. The result reveals that the trophic condition of Caohai is more serious than that of Waihai. Most of time Caohai was in extremely hypereutrophic state from 1988 to 2000. The trophic condition of Waihai had a worsening tendency from 1988 to 2000. Waihai was in eutrophic state before 1995, but it got in a hypereutrophic state after 1995. It was pointed out that TN and TP were the two biggest contributors of CTSIM in both Caohai and Waihai.  相似文献   

滤食性贝类营养需求和代用饲料研究进展     

王健  王萍  何义朝 《海洋科学》2000,24(4):26-30

  相似文献   

南海南部大陆架14ka来微型双壳类营养结构与海流活动   总被引：1，自引：0，他引：1  

冯伟民 《热带海洋》2000,19(3):50-58

双壳类食悬浮物类与食沉积物类的发育变化是反映水动力环境的一种指标,对南海南部NS93－12－58柱样14ka来微型双壳营养结构分析表明,晚更新世末次冰期向后期全新世转化阶段,食沉积物类一度较为发育,表明南海南部表层环流很不活跃,从这一转化阶段到全新世早期,双壳类食悬乳物类与食沉积物类的比例有规律地变大,表明随着气候转暖,海水温度增高,海平面上升,海流作用显增强,该柱样整样分析表明,双壳类食悬乳物类占据着明显的优势,显示了14ka来南海海流作用一直比较强例,在全新世中晚期,双壳类主要栖息在次表层水团的海底,仍以食悬浮物类为主,可能与南海南部陆坡上升流发育有关。  相似文献