稻蟹综合种养是天津地区主推的稻渔综合种养模式,占全市稻渔综合种养总面积的90%以上.近年来,为了缓解扣蟹苗种对本地区稻田综合种养的制约,同时增加经济效益和提高土地综合利用率,天津市尝试了“稻田-扣蟹”“稻田-成蟹”综合种养模式,通过稻田蟹池工程改造、水稻种植管理、成蟹养殖管理、蟹种培育管理等综合种养技术的应用,获得本地区稻蟹综合种养的基础养殖数据,为天津市稻渔综合种养产业发展提供理论支持.
本文总结了天津地区池塘养殖大口黑鲈的技术要点,对开展大口黑鲈养殖过程中出现的问题展开了讨论.试验表明,天津地区如在8月下旬前出售达商品规格的大口黑鲈,4月份需投放规格为100 g·尾-1的苗种,全程投喂配合饲料,养殖过程中注意调节水质,防治病害.
事业单位财务预算管理是一项重要工作,关系到事业单位的持续发展,也影响着事业单位资金运用的效果。但是因为受到诸多原因的影响,当前我国很多事业单位预算管理工作都十分科学,在预算管理中还面临很多问题,文章对这些问题进行了总结,提出一系列应对措施,希望能够为事业单位更好地开展预算管理提供参考和借鉴。
近年来,休闲渔业这种新兴的渔业经济和旅游方式逐渐发展起来,受到很多人的关注和热捧,对于渔业产业转型升级,推动旅游业的繁荣发展有着重要作用,可以说是有着巨大的发展潜力.现阶段我国休闲渔业的发展还面临着项目规划不科学,管理制度不完善,知名度不高等问题,对此应该及时有效的解决,要完善相关政策法规,突出地方特色,重视环境保护,从而促进休闲渔业更好更快的发展进步.本文主要针对我国休闲渔业面临的问题进行了研究,提出了相关对策及发展建议.
多年来,南美白对虾养殖作为天津地区渔业发展的主导产业,从养殖规模占比、渔业经济效益产出、渔民增收途径等方面都占据着十分重要的地位。2014年,天津市南美白对虾主套养面积达2万多hm2,超过全市水产养殖面积的一半,是除大宗淡水鱼以外的养殖优势品种。但由于近些年受到种质退化、养殖病害频发、产出率降低的影响,我市乃至全国对虾产业都遇到了极大的问题和挑战。
The cultivation of ornamental fish has been gaining more and more popularity and commercial importance. Consequently ornamental fish diseases have also caught attentions.Aequidens rivulatus is one of the most important ornamental fish in commercial fisheries in Tianjin of China. In recent years mass death ofA. rivulatus has caused heavy economic losses. In this study we aimed to identify the biological characteristics of the pathogens which caused diseases inA. rivulatus. A dominant bacterium 071901 was isolated from the kidney of diseasedA. rivulatus and was confirmed to be pathogenic toA. rivulatus in artificial challenge test. We examined the morphological, physiological and biochemical characteristics of this bacterium, and analyzed 16S rRNA andcfb gene (GBS-specific gene cfb, CAMP factor) for further identification. The 16S rRNA gene andcfb gene were partially sequenced and compared with data from the GenBank database. BLAST showed that 16S rRNA gene andcfb gene of strain 071901 were highly similar to their counterparts registered in GenBank. Based on the morphological observation and physiological and biochemical characterization, strain 071901 was identified asStreptococcus agalactiae. Phylogenetic trees ofS. agalactiae based on 16S rRNA gene indicated that strain 071901 was branched into the same cluster asS. agalactiae and showed the highest similarity to S. agalactiae.The results of molecular analysis ofcfb gene were consistent with the previous results from the biochemical assays.We then performed antimicrobial susceptibility assay for 30 antimicrobial agents and found that strain 071901 was susceptible to 19 agents including erythromycin, azithromycin and florfenicol, and was highly resistant to 11 agents including enrofloxacin, bacitracin and furazolidone. In conclusion our results demonstrated thatS. agalactiae was the pathogen that caused high mortality inA. rivulatus.