• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bangladesh journal of fisheries research >Health and disease status of Thai pangas, Pangasius hypophthalmus cultured in rural ponds of Mymensingh, Bangladesh
【24h】

Health and disease status of Thai pangas, Pangasius hypophthalmus cultured in rural ponds of Mymensingh, Bangladesh

机译：在孟加拉国Mymensingh的农村池塘中养殖的泰国Pangas，Pygasius hypophthalmus的健康和疾病状况

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thai pangas, Pangasius hypophthalmus is one of the important aquaculture species in Bangladesh. Over the last few years spectacular development has been taking place in Thai pangas farming in Mymensingh district. Due to availability of easy breeding and culture techniques as well as quick return, more and more people are converting their rice fields into pangas farms overnight. The present study was carried out to examine health and disease status of Thai pangas mainly through clinical, histopathological and bacteriological techniques. In addition, for collecting primary data on disease and health status of Thai pangas and the resultant socioeconomic impacts on rural households, questionnaire interview and participatory rural appraisal tools were used with selected farming households in three upazilas of Mymensingh district. The most prevalent diseases as reported by the farmers were red spot, followed by anal protrusion, tail and fin rot, pop eye, dropsy and gill rot. Other conditions like cottonwool type lesion, ulceration and white spot were reported but with lower incidence. Four isolates of Aeromonas hydrophila were recovered from kidney and lesion of diseased fish. Hemorrhage over the body especially near mouth and caudal region was noticedin the fishes associated with aeromonad infection. Internally, kidney, liver and spleen became swollen and enlarged. The isolates varied with their pathogenicity. All the four isolates were sensitive to Nitrofurantoin, Cotrimoxazole and Tetracycline butwere resistant to Amoxycilline. An attempt was made to treat diseased fish with extracts from neem leaf, garlic and turmeric. Recovery of infection was monitored through mortality and histopathology. General histopathological changes of different organswere also studied. Extract from neem (Azadirachta indica) leaf gave better result. Telangiectasis, lamellar hypertrophy and hyperplasia hemorrhage, lamellar fusion, necrosis of lamellar epithelial cells, presence of parasites and their cysts were the major pathology of gills. Hemorrhagic lesion, pyknotic nuclei and melanomacrophage centers (MMC) were found in the liver of fish. Major pathologies in kidney of fish included presence of MMC, necrotic and ruptured kidney tubules, severe haemopoietic necrosis, and hemorrhage. The economic loss due to disease in Thai pangas farming was estimated from the difference between expected production and actual production. On an average, Thai pangas farmers of Mymensingh incur a loss of Tk. 23,104/ha/cycle due to fish disease (3.6% of expected total production). The loss, however, varied with location and size of farms, type of farmers and management practices. The study also highlighted fish health management related problems and recommended further work for thedevelopment of user-friendly farmer-oriented fish health management packages.
机译：泰国pan鱼，Pangasius hypophthalmus是孟加拉国重要的水产养殖种类之一。在过去的几年中，Mymensingh地区的泰国Pangas养殖取得了惊人的发展。由于容易获得的育种和养殖技术以及快速的回报，越来越多的人在一夜之间将稻田变成了Pangas农场。本研究主要通过临床，组织病理学和细菌学技术检查泰国Thai的健康和疾病状况。此外，为了收集有关泰国Pangas疾病和健康状况以及由此对农村家庭产生的社会经济影响的主要数据，对Mymensingh地区的三个上调农户采用了问卷调查和参与式农村评估工具。农民报告的最流行的疾病是红斑，其次是肛门突出，尾鳍腐烂，爆眼，水肿和g烂。据报道，其他疾病如棉绒型病变，溃疡和白斑，但发病率较低。从患病鱼类的肾脏和病变中回收了四株嗜水气单胞菌。在鱼中，与气单胞菌感染有关的鱼身上尤其是嘴和尾巴附近出血。内部，肾脏，肝脏和脾脏肿大。分离株的致病性各不相同。所有四个分离株均对呋喃妥因，复方新诺明和四环素敏感，但对阿莫西林耐药。尝试用印ne叶，大蒜和姜黄提取物治疗患病鱼。通过死亡率和组织病理学监测感染的恢复。还研究了不同组织的一般组织病理学变化。印ne（印za）叶提取物效果更好。 g的主要病理是毛细血管扩张，板层肥大和增生性出血，板层融合，板层上皮细胞坏死，寄生虫及其囊肿的存在。在鱼的肝脏中发现了出血性病变，强直性核和黑色素巨噬细胞中心（MMC）。鱼肾的主要病理包括MMC的存在，肾小管坏死和破裂，严重的造血坏死和出血。根据预期产量与实际产量之间的差额估算了泰国Pangas养殖中因疾病造成的经济损失。平均而言，泰国Mygassingh的Pangas农民蒙受了Tk的损失。 23,104 /公顷/周期的鱼类病害（占预期总产量的3.6％）。但是，损失因农场的位置和规模，农民的类型和管理习惯而异。该研究还强调了与鱼类健康管理有关的问题，并建议进一步开展工作，以开发对用户友好的以农民为导向的鱼类健康管理软件包。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号