短钝溞（Daphnia obtusa Kurz)在“藻-螺-溞”系统中的反馈养殖与污水净化   总被引：4，自引：0，他引：4  

何健  谷孝鸿  黄诚 《湖泊科学》1999,11(4):328-332

本文对河蟹幼蟹蜕壳过程及蜕壳后的特征进行了比较斩观察,并初步探讨了蜕壳与光照,温度及生境的关系。对于０．５－２ｇ的幼蟹,蜕壳期大约需要３－６ｈ,软壳期需要２ｈ,薄壳期需要１５ｈ,幼蟹特别喜欢选择有草的生境作为蜕壳地点,也喜欢在池塘浅水区蜕壳,但是在２ｍ以内水深对蜕壳成功没有影响。  相似文献   

华鳈人工繁殖和早期发育的研究   总被引：1，自引：0，他引：1  

宋天祥  马骏 《湖泊科学》1996,8(3):260-267

1992年5月～7月分别对9组华鳈亲鱼进行的催产试验结果进行分析,并对其早期发育进行了较为详细的观察。华鳈受精卵在水温为22～33℃的条件下胚胎发育时间为54～74h,水温34℃左右时仍能正常发育;孵出时眼黑色,胸鳍基已形成,有发达的居氏管;孵出后第二天鳔即充气,第三天可以摄食并能自由在水层生活。  相似文献   

中华鳖(Pelodiscus sinensis)MITF基因的生物信息学及表达差异研究     

田儒品  张海琪  许晓军  何中央  丁雪燕  苏胜齐 《海洋与湖沼》2018,49(3):662-670

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季节因素、地理分布和栖息环境对青蛤性比和生殖指标的影响   总被引：1，自引：0，他引：1  

董志国  李晓英  阎斌伦  程汉良  孟学平 《海洋湖沼通报》2011,(3):21-26

本实验研究了不同季节、不同地理分布和不同栖息环境下青蛤的繁殖生物学差异,对连云港海区(LYG)、东营海区(DY)和海南岛海口海区(HND)的7个青蛤群体比较,研究结果表明不同季节和不同栖息地环境对青蛤群体的性比不存在显著性差异(P＞0.05);不同地理分布的青蛤群体除了海南岛的性比介于显著与不显著之间(P=0.05),...  相似文献   

Mushrooms in the Mountains: Assessing the Role of Fungi on the Ecosystem-based Adaptation (EbA) Practices in Nepal Himalaya     

DEVKOTA Shiva  SHRESTHA Uttam Babu  POUDEL Sanjeev  CHAUDHARY Ram Prasad 《资源与生态学报(英文版)》2022,13(6):1030-1036

To achieve the Sustainable Development Goals (SDGs), thereby meet the post 2020 global biodiversity targets and increase resilience to climate change, nature-based approaches such as ecosystem-based adaptation (EbA) is suggested as a promising and integrated adaptation strategy. EbA comprises adaptation strategies that value the role of ecosystems in reducing social vulnerability to climate change. Among the different biological groups on earth, fungi play not only an important role to maintain the biogeochemical cycle/nutrient cycle in ecosystems (supporting and regulating services), but also contribute to the socio-economic and cultural benefits of societies (provisioning and cultural services). Here, we present our knowledge and scientific understanding on how these neglected groups of biodiversity-fungi are crucial for ecosystem-based adaptation (EbA) approach based on our field experience, review and associated expertise on caterpillar fungus (Ophiocordyceps sinensis), and other wild mushrooms found in Nepal. Several species of fungi are used by local communities as food, medicines, and environmental income. Fungi are important sources of household income for mountain communities in Nepal providing a cushion during shocks and disasters and supporting food security, health care, education and building shelter. For the holistic EbA approach, it is essential to strengthen local institutions as well as indigenous local knowledge which could be an important policy intervention for the identification, conservation, and sustainable management of ecologically, socially and economically useful fungal species.  相似文献   

乌塘鳢Bostrichthy　sinensis　Lace＇pe＇de）的几种寄生虫病     

叶富良  陈刚  王洪海 《广东海洋大学学报》1994,(1)

本文报导了乌塘鳢发生的９种寄生虫病以及这些疾病的病原体、症状和防治结果。  相似文献   

Food web structure and trophic levels in polyculture rice-crab fields   总被引：1，自引：0，他引：1  

郭凯  赵文  李文宽  赵苑淞  张鹏  张晨 《中国海洋湖沼学报》2015,33(3):735-740

Stable carbon and nitrogen isotopes were used to investigate nutrient pathways and trophic relationships from the rice-crab system in Panjin,Liaoning Province,China. Values of δ 13 C ranged from-27.38‰±0.44‰ to-18.34‰±0.26‰ and δ 15 N ranged from 1.10‰±0.88‰ to 9.33‰±0.57‰. Pseudorasbora parva(Stone moroko) had the highest δ 13 C and δ 15 N values. The lowest δ 13 C values were obtained for the macrophytes and the lowest δ 15 N value was found in sediments. Stable carbon and nitrogen isotopes were used to determine the contribution of different food items to the diets of crabs. The δ 13 C results indicated that the P seudorasbora parva made the greatest contribution to the diet of E riocheir sinensis(Chinese mitten crab),while the δ 15 N results indicated that most food items contributed more than 10% to the diet of the crab. There were three trophic levels identified in the system(Levels 0–2). The crab Eriocheir sinensis,fish Pseudorasbora parva and Misgurnus anguillicaudatus(Oriental weatherfish),and the oligochaete L imnodrilus hoffmeisteri(Limnodrilus worm),were at the second level,zooplankton were at the first level and suspended particulate matter and macrophytes were at trophic position 0.  相似文献   

GENETIC DIFFERENTIATION WITHIN ERIOCHOIR SINENSIS (MILNE,EDWARDS) REVEALED BY ALLOZYME AND RAPD     

崔朝霞  相建海  宋林生  周令华  史为良 《中国海洋湖沼学报》2000,18(3)

ＩＮＴＲＯＤＵＣＴＩＯＮＥｒｉｏｃｈｏｉｒｓｉｎｅｎｓｉｓｉｎＣｈｉｎａｉｓｃｏｍｍｏｎｌｙｃａｌｌｅｄｍｉｔｔｅｎｃｒａｂ .Ｉｔｉｓａｎａｄｒｏｍｏｕｓ,ｗｉｔｈｉｎｄｉｖｉｄｕａｌｓｍｏｖｉｎｇｆｒｏｍｆｒｅｓｈｔｏｍａｒｉｎｅｗａｔｅｒｔｏｓｐａｗｎ .Ｔｈｅｒｅａｒｅｔｗｏｃｏｍｍｅｒｃｉａｌｐｏｐｕｌａｔｉｏｎｓ:ＣｈａｎｇｊｉａｎｇＲｉｖ ｅｒ (ＣＲ)ａｎｄＬｉａｏｈｅＲｉｖｅｒ (ＬＲ) .Ｔｈｅｓｅｔｗｏｐｏｐｕｌａｔｉｏｎｓａｒｅｖｅｒｙｄｉｆｆｉｃｕｌｔｔｏｉｄｅｎｔｉｆｙｆｒｏｍｔｈ…  相似文献   

主成分分析在双壳类软体动物研究中的应用     

关则良  刘东超 《广东海洋大学学报》1992,(2)

用主成分分析方法通过计算机把雌性青蛤的软体部干重和3个生化指标综合为肥满指标和能源物质指标,从而允许用二维图象来显示。14个样品明显地分为碳水化合物为主要贮存能源物质和脂类、蛋白质为主要贮存能源物质两类。两个新指标的累积贡献率达94％。  相似文献   

育成规格和饵料对中华绒螯蟹(Eriocheir sinensis)雄蟹可食部分营养成分的影响     

杨志刚  纪连元  阙有清  成永旭  郭子好  杨筱珍 《海洋与湖沼》2014,45(2):353-358

本实验通过投喂不同饵料后,研究不同育成规格中华绒螯蟹(Eriocheir sinensis)雄蟹肝胰腺、性腺和肌肉等可食部分含量、营养成分及脂类组成的变化。肌肉营养成分测定表明:育成规格对粗脂肪、甘油三酯和磷脂含量有一定影响(P0.05或P0.05);饵料对水分、粗蛋白、游离脂肪酸、胆固醇和磷脂含量没有显著影响(P0.05)。肝胰腺营养成分测定表明:育成规格对粗脂肪、胆固醇和磷脂含量有一定影响(P0.05或P0.05);饵料对水分、粗蛋白、甘油三酯和游离脂肪酸的含量没有显著影响(P0.05)。性腺营养成分测定表明:育成规格对粗脂肪、粗蛋白、游离脂肪酸、甘油三酯和胆固醇含量有一定影响(P0.05或P0.05);饵料对水分、粗蛋白和磷脂含量没有显著影响(P0.05),杂鱼组三种规格粗脂肪和甘油三酯含量显著高于配合饲料组(P0.05)。总体试验结果表明:育成规格以及饵料对中华绒螯蟹雄蟹可食部分含量和营养成分含量有一定影响。  相似文献