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为贯彻落实新时期我国渔业发展的方针政策,加强海洋渔业管理,进一步完善海洋捕捞许可制度,我部于1999年和2000年先后在全国沿海地区开展了捕捞许可制度实施情况大检查和海洋渔船普查工作。检查和普查情况表明,我国海洋渔船管理和捕捞许可制度的建立,对保护渔业资源发挥了重要作用,但海洋捕捞强度增长仍未得到有效控制,主要原因是执法工作不力,“三无”和“三证不齐”渔船大量存在,特别是小船艇和排、筏数量庞大。 “三无”和“三证不齐”渔船的大量存在,对我国海洋渔业资源的保护和合理利用造成了极大威胁,严重影响我国… 相似文献
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浅谈“三无”船舶的危害与清理取缔的对策 总被引:1,自引:0,他引:1
浅谈“三无”船舶的危害与清理取缔的对策张跃岐(锦州渔港监督处121000)所谓“三无”船舶:是指无船名船号、无船舶证书(即:无有效渔业船舶检验证书、船舶登记证书、捕捞许可证)、无船籍港。据国家统计截止1994年底全国有“三无”船舶41800艘,辽宁省... 相似文献
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农业部于2001年2月27日在北京召开了清理整顿三无和三证不齐渔船新闻发布会。20多家新闻单位的记者和有关方面的代表40多人出席了发布会。新闻发布会由农业部办公厅副主任张文宝主持,刘坚副部长做了重要讲话。刘副部长和渔业局李健华副局长解答了记者们的提问。 我国是一个海洋渔业大国,保护和合理利用海洋渔业资源,是我们的职责。但是,多年来不少地方盲目造船下海捕鱼,造成渔船数量增加,捕捞总功率增大,致使海洋捕捞强度严重超过海洋渔业资源的承受能力。去年,农业部开展了首次全国海洋渔船普查工作,基本上摸清了海洋… 相似文献
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[本刊讯](刘统锦)农业部于近日向各海区渔政渔港监督管理局、沿海各省、自治区、直辖市渔业主管厅(局)发出《关于开展首次全国海洋渔业船舶普查的通知》,通知指出,为了全面、准确地掌握我国海洋渔业船舶现状,加快渔业船舶管理现代化,制定科学、可行的海洋渔业资源管理制度,有效地控制捕捞强度,保障渔民的生命财产安全,促进海洋渔业持续、稳定、健康发展,并为建立海洋渔业船舶报废制度,制订清理“三无”和“三证”不齐渔船及渔业燃油税返还方案等重大方针政策提供依据,决定开展首次全国海洋渔业船舶普查工作。农业部还成立了以… 相似文献
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<正> 1994年底国家五部、局发布了《清理取缔“三无”船舶通告》,沧州市经过三个多月的艰苦工作,。清理出“三无”渔船20艘;证件不全的渔船607艘,其中无有效捕捞许可证的180艘,无有效渔船检验证书,无有效船舶登记证书的427艘。被请理出的渔船全部补交了费用,补办了证件,走上了持证生产的道路,从而减少了无证船舶的数量,减 相似文献
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The variation of virulence of Renibacterium salmoninarum , the causative agent of bacterial kidney disease (BKD) in salmonid fish, was studied by infecting rainbow trout, Oncorhynchus mykiss (Walbaum), with two isolates (strains 325 and 932) from diseased Atlantic salmon, Salmo salar L., and one isolate (strain 4366) from an apparently healthy Atlantic salmon. Coho salmon, Oncorhynchus kisutch (Walbaum), were injected with the strain 932 to estimate difference in fish species resistance. Fish were removed by random sampling for other study purposes, a study design possible with analysis of lifetime distributions incorporating both sampling-, death- and survival-times. At the end of the experiment, the rainbow trout infected with strains 325, 932 and 4366 had a survival probability of 33%, 51% and 72%, respectively. The coho salmon infected with strain 932 had a 26% survival probability. The strain differences were significant according to the log-rank test, and the risk ratio between the strains ranged from 1·8 to 5·4. The strain from the apparently healthy fish was least virulent. The survival of the fish species was different over time. Rainbow trout were more likely to die early in the time course, but high numbers of coho died later, resulting in an overall risk of mortality of 1·4 in favour of rainbow trout. Differences in virulence may reflect changed selective pressure on R. salmoninarum when introduced from feral stocks into the environment of fish farms. 相似文献
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水硬度对七彩神仙鱼幼鱼发育的影响 总被引:4,自引:0,他引:4
采用不同硬度的水对七彩神仙鱼幼鱼进行饲养。6周龄幼鱼在硬度为7.94°dH±0.30°dH时饲养84d后,比在硬度为14.71°dH±0.23°dH水中的幼鱼个体大,生长速度快。表明较高硬度的水有利于七彩神仙鱼幼鱼的生长发育。 相似文献
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牙鲆刺激隐核虫病的防治 总被引:1,自引:0,他引:1
2005年七、八月份,乐亭、滦南一带多家工厂化牙鲆养殖场发生刺激隐核虫病,此种病虫害发病急、传染快、死亡率高。发生过该病的养殖场牙鲆死亡率一般都在50%~80%之间,这种病害给牙鲆养殖业带来很大损失。 相似文献
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《水生生物资源》2003,16(5):461-465
Anti-proteinase activity was demonstrated in the seminal plasma of cyprinid fish species (bream, chub, ide, dace, asp, goldfish, roach, common carp) using electrophoretic techniques combined with a detection method based on inhibition of bovine trypsin. We found species-specific protease inhibitors in the seminal plasma of cyprinids. At least three bands of protease inhibitors with different migration rates could be identified by native PAGE. Higher variability was characterized for bands with slower migration rates. Visualization of inhibitors after SDS-PAGE under non-reducing conditions allowed estimation of their molecular weights. Apparent molecular weights were within the range of 51–59 and 47–54 kDa for the bands with slower and moderate migration rates, respectively. The molecular weight of fast migration bands for roach and common carp were estimated to 23 and 30 kDa, respectively. Inhibitors of common carp seminal plasma differed in their affinity toward serine proteases. Three inhibitors in common carp seminal plasma could be visualized using cod and bovine trypsin, but only two inhibitors (of high molecular weight) were recognized with chymotrypsin. There were differences in anti-proteinase activity and seminal plasma protein concentration in relation to the origin of common carp seminal plasma (breeding lines) and time of milt collection (spawning vs. post-spawning season). 相似文献
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七种甲壳类水产品脂肪酸组成的分析研究 总被引:5,自引:0,他引:5
水产动物食品中富含ω—3型多稀酸,其中尤其是C_(20:5)(EPA)和C_(22:6)(DHA)对人体有特殊保健功能。本文对七种常见的甲壳类水产品进行脂肪酸组成分析,它们是中国对虾、日本沼虾、安氏白虾、克氏原螫虾、葛氏长臂虾、中华绒螯蟹和三寺疣梭子蟹。测定主要采用黄志斌、李淡秋(1990)的“快速制备脂肪酸甲酯用于气相色谱分析”一文所提供的方法。结果显示,被测样品中不饱和脂肪酸含量高于饱和脂肪酸,而不饱和脂肪酸中多烯酸含量高达60%,且以长碳链(C_(20)、C_(22))ω—3型为特征,表明甲壳类水产品体脂中EPA和DHA含量甚高,超过淡水鱼的一倍,但略逊于海水鱼。值得注意的是,甲壳类水产品中EPA的含量高于DHA的含量,这与鱼类中的情况正好相反。 相似文献
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该研究通过肉眼观察、镜检,进行干露、饥饿、盐度突降、福尔马林等抗性试验,并采用病毒检测等方法,以期建立评估斑节对虾(Penaeus monodon)虾苗活力和质量标准。结果表明,斑节对虾健康虾苗具有趋光性、集群性,体表光洁,肌肉透亮,肠胃食物充盈等特性。测试虾苗干露时间以15min为宜,健康虾苗干露后能立即恢复活力,而病弱虾苗多出现死亡、昏迷现象;虾苗的成活率随饥饿时间的延长而降低,随福尔马林浓度升高和时间延长而降低,随盐度突降幅度增加而降低。健康虾苗能忍受100~200μL·L^-1福尔马林溶液30min,成活率近100%;在盐度20~30下虾苗的成活情况较好,而其在淡水中仅能存活1h。对虾苗进行病毒检测,可以避免养殖中因虾苗携带病毒而可能导致的病毒性疾病的暴发。 相似文献
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鳟鱼发眼卵和旨种运输是养鳟生产的重要环节。发眼卵多在冬季和早春运输,苗种多在晚春和夏季运输。苗种运输大多以鱼篓充氧进行短距离汽车运输,长途运输冷水性鱼苗种的实例很少。本文总结了金鳟和虹鳟苗种长途运输方法,以期与养鳟业界共同交流提高。一、包装材料和方法内包装材料是苗种运输专用塑料袋,规格54×104cm,外包装是泡沫塑料箱,规格63.5×45.5×30.5cm,纸箱规格64×46×32.5cm。塑料袋采取双层式,内装苗种和水共12.5kg,其中苗种0.5-1.3kg,100-2000尾。起运前苗种停食1-2天。运鱼用水水温调至6℃,鱼、水入袋后袋内… 相似文献
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猪的胎盘属于弥散型胎盘,这种胎盘的结构特点和饲养管理的不当,常常导致母猪胎衣不下发生,给生猪的生产繁殖带来极大损失。本文针对母猪胎衣不下发生病因、综合防治进行详细阐述,旨在对预防和治疗胎衣不下能有所帮助。 相似文献