科创中国

Most seabird species display colonial behavior during the breeding period which implies that food resources around breeding sites can easily go depleted. Seabirds need to both reach profitable areas, which can be located far from the colony, and return to the colony regularly. In this context, flexibility in movement behavior may be crucial for breeding success. During chick-rearing, Procellariformes species can alternate short trips lasting 1-4 days for chick provisioning with longer trips for self-provisioning in what has been called a dual-foraging strategy. We analyzed foraging trips from 136 Scopoli's shearwaters from three Mediterranean colonies tracked with GPS during 6 chick-rearing seasons to assess whether the adoption of a dual fo- raging strategy depends on the quality of habitat surrounding the colony. We found a marked dual-foraging strategy only in birds from the Linosa colony which was the largest colony in terms of breeding pairs and was characterized by having a lower marine habitat quality. Birds from this colony performed foraging trips that extended up to 369 km from the nest and lasted more than 10 days. In general, the decision to perform long lasting trips was triggered by lower values of primary production and higher offspring weight. Contrary to expectation, the decision to feed far from the colony was not related to the parents' weight. At the same time, despite the higher productivity offered by distant areas, the higher proportion of long trips performed by birds breeding in poor areas was not sufficient to maintain the same body mass as the ones breeding in richer areas [Current Zoology 60 (5): 622-630, 2014].

德国GAATEM公司历时4年开发出了一种被称为BECK-Fish的可移动下潜式圆柱形养殖网箱.该养殖网箱可在一根类似于转轴的长达500m的锚缆上移动,还可以与装备有繁殖与养殖设施的、充当海洋水产养殖中心(MAC)的停泊的渔业船舶相挂靠.当选择使用水池时,

山东省奶山羊工程研究院是目前全国惟一一家奶山羊工程研究院,占地50亩,规划建设研发室、化验室、检测室、数据库、国际标准化生产车间、专家公寓等设施.将建成全国研发能力最强、标准化程度最高、集聚效应最好的产业科研"孵化器".近几年来,阳春羊奶采用"公司+基地+合作社+养殖户+银行"的"阳春模式",已在潍坊及周边地市建成7个标准化养殖基地、32个奶山羊养殖合作社,存栏奶山羊超过18万只,

直接并持续地监测溶解二氧化碳(dCO2)对于集约化水产养殖,尤其是浅水水道养殖系统(SRS)是至关重要的.本研究采用不同的水溶液、纯氧注入及搅动等影响因素,测试了一个便携式溶解二氧化碳探针检测仪(分析仪)的性能.

建立遗址与建筑的场所共生理念,会帮助遗址博物馆建筑处理好建筑与环境、遗址和人的关系,促使建筑实现环境认同和归属的本质.通过锚固于环境,强化遗址主题展示,丰富参观体验过程,引导驻足与停留等策略,有助于创作出体现场所精神和意义的遗址博物馆建筑.

在虾的疾病当中,白斑综合症病毒是最重要的一种.以前的研究有报道,养殖水体中更高百分比的黄色弧菌,诸如小球藻等天然食物的充足供应,以及绿水技术(GW)的应用等是阻止白斑综合症病毒爆发的几种生态方法.本研究旨在调查3个系统(与罗非鱼同养以模拟GW条件,

下一步是增加空气系统.为了取消在USB项目7516-OCAT网箱的沉没测试中计划测试所需要的潜水呼吸器,必须安装空气系统.在下部和斜管的HDPE上钻孔并攻丝用于注入和排放空气和水(图17).安装了铜的输入阀门和管接头.所有进气阀和管接头都是3/8英寸的.斜管和底部管子上的进水管阀门是0.75英寸的,这样能加速管内水的注入和排放.在阀门的螺纹上使用了螺纹密封剂(液态的Teflon)以确保阀门不会漏气.经验证明在HDPE管子上钻孔和攻丝的方法能取得很好的效果.

无线传感器网络适用于水产养殖环境监测,而监测数据的信息显示和发布是整个系统的重要组成部分.结合水产养殖监测的特点,设计了一种基于WSN的水产养殖监测信息发布系统,其中无线传感器网络部分采用MSP430芯片为控制核心,将各节点的数据采集到汇聚节点;信息显示部分采用LED显示屏,工作人员可直接观察到监测数据.试验结果表明,该系统具有传输速率快、功耗低、可视性好、稳定可靠等优点,对水产养殖的实时监测具有一定的参考价值.

从2012年年初开始,国内玉米价格强势上涨.虽然4月中旬曾一度小幅回落,但6月中旬玉米价格又重返上升通道.上半年全国玉米均价达2372元/t,同比上涨12.95%.在玉米价格节节攀升之时,下游的养殖行业的利润却持续下滑,淀粉、酒精、味精等深加工行业甚至已进入亏损状态.

采用ISSR(inter-simple sequence repeat)标记对鱇浪白鱼野生与养殖群体的遗传多样性和遗传结构进行分析.从40条引物中筛选出了13条用于扩增,共检测到97个位点,其中多态性位点72个.鱇浪白鱼野生群体的遗传多样性(PPB=62.89%; H=0.2490;I=0.3636)高于养殖群体的遗传多样性(PPB=58.76%; H=0.2267; I=0.3314).结果表明,鱇浪白鱼总体遗传多样性水平较高.基于Nei's遗传多样性分析得出的野生与养殖群体间的遗传分化系数Gst=0.0826,分子变异分析(AMOVA)结果显示Fst=0.0796,2种方法揭示的鱇浪白鱼群体间的遗传分化的趋势基本一致,表明约8%遗传变异存在于群体间,遗传变异大多存在于群体内.UPMGA聚类树中,野生与养殖群体大多各自相聚,再相互混杂,群体间的基因流Nm(5.55)比较高,说明野生群体和养殖群体间有一定程度的遗传分化,但没有达到种群遗传分化的水平,在遗传上有一定的交流空间.