种草 喂猪 养鱼 沼气四位体生态养鱼技术

目前，我国农业和农村经济已进入了一个新的发展阶段，在这个新的发展阶段中除了增加农民收入，推进农业和农村经济结构战略性调整之外，还有一个显著的特点就是将生态环境建设和保护纳入了农业发展的目标之中，强调农业的可持续发展问题。农业部在“十五”期间实施的“生态家园富民计划”，就是从农民最基本的生产和生活单元内部，挖掘潜力，以可再生能源的科学利用为切入点，引导农民改变落后的生产生活方式，达到增加收入，保护生态，实施可持续发展的目标。     

广州“智慧乡村”在行动

足不出户知天下？对于广州农民来说，这已不是天方夜谭。针对广州北部山区农民信息不对称、缺乏农业知识和专家服务支持、农产品销售难等核心问题，广州于2011年8月启动建设“智慧乡村”项目。该项目是北部山区扶贫开发的重点工程，由广州市农业局牵头，广州市科信局、中国移动广州分公司、广州薪火网络科技有限公司共同配合建设。工程利用现代信息技术手段，搭建信息化服务平台，旨在帮助改善山区农民生活条件．提升农业生产效率和推动农村发展，助力北部山区农民实现“信息技术改变生活”。     

山区池塘沼液养鱼技术

为改善农民生产和生活条件,增加农民的收入,保护生态环境,当地政府按农业部要求组织实施生态家园富民计划,几年来共累计发展农村沼气15000余口（截止2009年底）,并大力推广沼气综合利用技术,为农民增收、新农村建设做出了应有的贡献。     

欢迎订阅2007年《齐鲁渔业》

在浉河区五星办事处的稻田里“莲藕成片，荷花争艳，鲤鱼畅游，虾戏其间”，形成一幅优美的画卷。为了增加农民收入，浉河区五星办事处利用辖区内山冲田的优势，引导、鼓励农民及时调整种养结构，支持农民种植莲藕，藕下养鱼，开展生态、立体养殖，对种植莲藕的农民进行适当奖励。该办事处从湖北引进莲藕高产品种“大红袍”加以推广．农民在田地种植莲藕，藕下养殖泥鳅、鳝鱼等，用密眼网隔离。     

声音

“惠农不能忘记‘惠渔’啊！ ——在今年全国两会期间，全国人大代表、大湖水殖股份有限公司党委书记罗祖亮提议说。他表示，渔民与农民生活在同地、生产资源同种、生产生活条件同样、身份地位同等，但农民享受到各种优惠政策，同属农民的渔民却很少享受到优惠政策。     

“氹仔”养鱼的现状和发展思考

“氹仔”养鱼是指山区农民利用当地丰富的山溪水、山泉水和草木资源，在房前屋后、山坑坡地挖醛叠石砌基建成“氹仔”，在“氹仔”中进行养鱼（主要是草鱼等草食性鱼类）的养殖方式。“氹仔”养鱼水质清新、含氧量高，种苗、饵料无污染，病害少施药少，产品质量安全有保证，是一种健康、节能、高效的生态养殖模式，其经济效益比山区渔业平均值约高70～80％。     

农民杨金尧的“生态养鳝法”

农民杨金尧的“生态养鳝法”江苏省金湖县银集镇团结村农民杨金尧，几年来悉心钻研黄鳝养殖技术。他将水泥池养黄鳝的经验和报刊上介绍的外地网箱养黄鳝的技术巧妙地结合在一起，发明了一种新的黄鳝养殖方法──生态养鳝法。１９９４年，７２ｍ２的生态养鳝池，产黄鳝８０...     

浅谈乡镇畜禽粪污资源化利用

在2022年2月发布的“中央一号文件”中已经明确指出,在全面推进乡村振兴期间,应该加强畜禽粪污资源化利用,推进农业绿色发展,实现畜牧大县粪污治理全覆盖,最终实现“乡风文明”和“生态宜居”目标。基于此,探究乡镇畜禽粪污资源化利用的主要模式和实施策略,以达到节能、环保的目的,进一步改善农村人居环境,既保护了乡镇的环境资源,又达到循环生产利用的目标,确保新时代乡村振兴目标任务如期完成。     

黄河三角州稻田高效生态种养殖技术

2004年笔者在垦利县胜坨镇进行了水稻与日本沼虾、河蟹、鱼类高效生态种养试验，通过利用稻田内的水、肥、杂草等，为鱼、虾、蟹提供特定的生活条件．改变了单纯的种植、养殖模式，从而达到“稻养鱼虾，鱼虾蟹养稻，种植增产，养殖增收”的目的。经当地推广，每667m^2增产稻谷91kg，生产水产品51kg。现将主要技术介绍如下：     

黄河三角洲稻田高效生态种养技术

2004年我们在垦利县胜坨镇开展了水稻与日本沼虾、河蟹、鱼类高效生态混养，通过利用稻田内的水、肥、杂草等，为鱼、虾、蟹提供特定的生活条件，改变了单纯的种植、养殖模式，从而达到“稻养鱼虾，鱼虾蟹养稻，种植增产，养殖增收”的目的。通过在当地推广，平均每667m^2增产稻谷91kg，生产水产品51kg，形成了适宜在当地推广的高效生态稻田养殖模式。该生态养殖模式具有节地、节水、节肥、节药、增产、增收等多种效果。现将主要技术介绍如下：     

Anguilla huangi Teng, Lin, and Tzeng, 2009, is a junior synonym of Anguilla luzonensis Watanabe, Aoyama, and Tsukamoto, 2009

Anguilla luzonensis and A. huangi were each described in 2009 using eels obtained from northern Luzon Island. We examined the taxonomic status of these two groups of eels using morphological and molecular genetic characters. There were no significant differences in two vertebrae counts between eels of A. luzonensis and A. huangi. Mitochondrial 16S ribosomal RNA and cytochrome b genes sequences were obtained and compared among 28 specimens of A. luzonensis, the holotypes of A. luzonensis and A. huangi, and one specimen of the other 15 anguillid species. The specimens of A. luzonensis exhibited almost identical sequences, including the holotype, with only a few site differences, and the genetic difference between the holotypes of A. luzonensis and A. huangi was within the range of differences of specimens of A. luzonensis. The other anguillid species were genetically very different from A. luzonensis and A. huangi, although A. interioris is a closely related species. It is clear that A. luzonensis and A. huangi are the same species, and according to the principle of priority in zoological nomenclature, A. luzonensis Watanabe, Aoyama, and Tsukamoto, 2009 is the valid species name, and A. huangi Teng, Lin, and Tzeng, 2009 is a junior synonym of A. luzonensis.     

Atlantic Fisheries Technological Conference,Moncton, NB,August 21, 1995

No abstract available for this article.     

Age,growth, maturity and the overfishing of the iconic sciaenid,Argyrosomus japonicus,in south-eastern,Australia

Mulloway (Argyrosomus japonicus) occur in estuarine and coastal waters surrounding Australia, Africa, India, Pakistan, China, Korea and Japan, where they are important in fisheries. This study identified that mulloway in south-eastern Australia had similar growth rates, but matured at smaller lengths and younger ages, to those in South Africa and Western Australia. Growth of both sexes was similar to about 5 years, after which females grew faster and attained a greater maximum length than males. Female mulloway matured at 4–5 years of age with a L₅₀ of 68 cm, whereas males matured at 2–3 years of age with a L₅₀ of 51 cm. The commercial fishery in New South Wales was characterised by declining catches and a reduction in the proportion of mulloway of mature lengths in landings. During 2002–2005 commercial landings were dominated (83%) by fish within 15 cm of the current minimum legal total length of 45 cm and aged 2 and 3 years (>80%), even though mulloway can attain lengths of 200 cm and live >30 years. Estimates of the rates of instantaneous total mortality ranged between 0.34 and 0.45, whilst the rate of instantaneous natural mortality (M) was estimated to be approximately 0.12. Yield-per-recruit analyses indicated that mulloway in New South Wales are being growth overfished and substantial increases in yield could be achieved by increasing the length at first harvest. Values of the spawning potential ratio were below 0.2 under a range of mortality estimates, suggesting that mulloway are at risk of recruitment overfishing. These results suggest that the spawning stock of mulloway in south-eastern Australia has been depleted and that remedial management action is required to protect this iconic species.     

Effects of Mosquitofish,Gambusia affinis,on Channel Catfish,Ictalurus puncatatus,Production Ponds

Mosquitofish, Gambusia sp., have been spread throughout the world to biologically control mosquitoes. However, the fish has gained a reputation as an invasive species and has been implicated in displacing native aquatic species. Gambusia affinis are native to the southeastern United States and commonly occur in commercial channel catfish, Ictalurus punctatus, production ponds. We investigated effects of mosquitofish presence on zooplankton populations, water quality, disease occurrence, and fish production in experimental ponds. There were no differences between ponds with or without mosquitofish in numbers of calanoid copepods, cyclopoid copepods, total copepods, Bosmina sp., Ceriodaphnia sp., Moina sp., Daphnia sp., or total cladocerans. There were also no differences in copepod and cladoceran sizes. Copepod nauplii were more numerous during the summer months in ponds with mosquitofish. There were no differences in water quality variables (soluble reactive phosphorus, nitrate, nitrite, ammonia, total nitrogen, total phosphorus, pH) or phytoplankton density between ponds stocked with and without mosquitofish. Catfish production and disease occurrence were also similar between ponds with and without mosquitofish. Although mosquitofish may cause problems when stocked outside their native range, there does not appear to be any adverse effects of mosquitofish presence in catfish production ponds.     

Surface disinfection of Pacific threadfin, Polydactylus sexfilis, and amberjack, Seriola rivoliana, eggs

The effects of exposing the eggs of Pacific threadfin and amberjack eggs (AEs) to different concentrations of hydrogen peroxide for 5 min on hatch rate and survival were assessed in a series of experiments using a petri dish model rearing system. Despite significant inter‐batch variation in hatch rate, it was shown that eggs of both species could be safely exposed to up to 11 340 mg L⁻¹ H₂O₂ for 5 min. Exposure to 34 230 mg L⁻¹ H₂O₂ for 5 min was shown to be lethal to AEs at a late stage of development. In two further experiments, it was demonstrated that Pacific threadfin eggs were resistant to all tested concentrations of a range of polyvinylpyrrolidone iodine (PVP‐I) concentrations and contact times (up to 1000 mg L⁻¹ PVP‐I for 10 min). The level of bacteria adhering to the eggs of both species was highly variable. Where eggs were heavily colonized (>10⁴ cfu egg⁻¹), hydrogen peroxide concentrations of at least 11 340 mg L⁻¹, or PVP‐I concentrations higher than 500 mg L⁻¹ for 10 min, were required for effective sterilization. In less colonized batches, rinsing in sterile seawater or exposure to lower (550 mg L⁻¹) concentrations of H₂O₂ was sufficient to result in high apparent levels of surface sterility (<1 cfu egg⁻¹).     

Compositional differences,antioxidant activity,angiotensin-converting enzyme inhibition,and sensory characteristics of kamaboko fermented in wheat,rice, brown rice,and soybean koji

Fisheries Science - Fermentation of kamaboko in koji with wheat (KW), rice (KR), brown rice (KB), or soybean (KS) was performed by simulation of tofuyo processing. Moisture and protein content...     

Sperm Motilities in Waigieu Seaperch,Psammoperca waigiensis: Effects of Various Dilutions,pH, Temperature,Osmolality, and Cations

The objectives of this study were to evaluate the effects of varying dilutions, pH, temperature, osmolality, and cations on sperm motility parameters in waigieu seaperch, Psammoperca waigiensis. The maximum velocity of average in path (VAP), percentage of motile cells (MOT), and duration of sperm motility (DSM) were observed when semen was diluted in artificial seawater (ASW) at a ratio of 1:100 (144.9 ± 0.6 µm/sec, 95.6 ± 0.4%, and 230.3 ± 2.3 sec, respectively), at 30 C (142.0 ± 0.6 µm/sec, 93.6 ± 0.4%, and 238.3 ± 0.9 sec, respectively), and pH 8 (144.8 ± 0.6 µm/sec, 93.3 ± 0.4%, and 234.0 ± 1.5 sec, respectively). Maximum VAP, MOT, and DSM were obtained in each solution containing 0.6 M NaCl (143.8 ± 1.0 µm/sec, 91.3 ± 2.0%, and 230.6 ± 4.2 sec, respectively), 0.6 M KCl (135.1 ± 3.1 µm/sec, 91.1 ± 3.1%, and 230.3 ± 3.7sec, respectively), 0.2M CaCl₂ (105.3 ± 4.7μm/sec, 47.9 ± 2.7%, and 120.7 ± 1.3 sec, respectively), 0.2 M MgCl₂ (107.3 ± 3.0 m/s, 42.1 ± 3.3%, and 120.3 ± 4.8 sec, respectively), and osmolality of 400 mOsm/kg (145.1 ± 2.5 µm/sec, 93.0 ± 2.1%, and 346.5 ± 4.4s, respectively). We used these mediums as artificial insemination media for fertilizing matured eggs. The results showed that the fertilization and hatching rates in 0.6 M NaCl (75.3 ± 0.6% and 57.0 ± 2.4%, respectively), ASW (70.8 ± 1.2% and 51.2 ± 1.8%, respectively), or 400 mOsm/kg (72.9 ± 1.8% and 55.3 ± 1.6%, respectively) were higher than that in seawater (63.9 ± 1.2% and 39.2 ± 3.9%, respectively). In conclusion, using 0.6 M NaCl, ASW, or 400 mOsm/kg as an artificial insemination medium is effective for fertilizing of waigieu seaperch.     

Operating parameters affecting biofloc technology: carbon source,carbon/nitrogen ratio,feeding regime,stocking density,salinity, aeration,and microbial community manipulation

Aquaculture International - The world population continues to increase day by day. Therefore, aquaculture needs to grow in order to response the need for protein foods and to cope with the problem...