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闽江河口湿地水禽资源及其保护 总被引：4，自引：0，他引：4
闽江是福建省的第一大江，流域面积约6．1万平方公里，占福建土地面积的50％。年平均径流量为620亿立方米，被誉为福建省的“母亲河”。闽江河口湿地西起长乐市猴屿镇，东至梅花镇，面积约30平方公里。从西向东依次分布有泥质、半泥质和沙质滩涂。 相似文献
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《畜牧兽医科技信息》2005,(5):76
世界卫生组织西太平洋地区办事处4月18日公布，从2003年12月到2005年4月14日的16个半月时间内，东南亚地区总计确诊人感染禽流感病例88人，死亡病例51人，死亡率为58％。2003年12月到2004年12月期间，泰国报告人类感染禽流感的确诊病例17人，其中12人死亡；越南报告确诊病例28人，其中20人死亡。 相似文献
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为了解水环境对种鹅生产性能的影响，我们于2004年9月至2005年4月底在泰州正荣特种禽业发展有限公司河横种鹅基地对狮头鹅公鹅与雁母鹅进行分组对比试验。参试鹅2004年3月24日出雏，在基地经过育雏、选种、选育且进行常规免疫，公母比为1：5，采用同样的饲养条件和方法。试验组种鹅912只，其中公鹅152只，母鹅760只，采用人工流动水；对照组391只，其中公鹅65只，母鹅326只，放养于天然流水河面。分组于2004年8月24日完毕，预试期7天。 相似文献
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申济丰 《畜牧兽医科技信息》2004,(4):7-10
从2003年12月开始，一种高致病性禽流感病毒席卷泰国、越南、日本、韩国等亚洲国家。自2004年1月27日，我国首次公布确诊湖北鄂州、广西隆安等地出现高致病性禽流感(HPA)疫情以来，截至2月4日，共出现高致病性禽流感疫情23起，其中疑似18起，确诊5起；全国合计病禽56417只，死亡49236只，扑杀1215057只。我国已发生的几起疫情已得到较好 相似文献
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丰县某肉种鸭场，占地10多亩，现有鸭棚16栋，存栏樱桃谷肉种鸭4800只，放在4个棚里，其中前两棚2300只，2004年4月12日进的苗鸭，至今已有200多天，才有十几只产蛋；后两棚2500只，2004年2月26日进的苗鸭，至今有8个多月，产蛋率70％，受精率90％左右，孵化率50％～60％。该场反映2004年4月12日另一户也于同一场家、同一时间购进了相同数量的苗鸭，到180日龄时产蛋率已达60％。于是请笔者到该场实地调查了解情况查找原因，该场主对种鸭饲养管理缺乏知识． 相似文献
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和田地区策勒县恰哈乡种羊场（私人企业）于2004年6月21日从山东省梁山县购买了1148只小尾寒羊；其中1～2周岁的种公羊108只，6～8月龄的母羊1040只。2004年6月27日运回和田。在经过了7000km，历时6天6夜的运输途中共死亡42只，而到达目的地后至7月12日2周内又先后死亡366只左右。畜主到当地兽医站就诊。 相似文献
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一起兔肝型球虫病和大肠杆菌病并发的诊治 总被引：1，自引：1，他引：0
2003年3月27日，我市百色镇黄某饲养的156只兔子相继病死。畜主称，3月26日下午部分兔子在舍外被雨淋湿，第2天兔群开始精神不振，随后拉黄色稀便，使用土霉素、庆大霉素等药物进行治疗均无效；至4月8日到我站就诊为止已有65只兔子病死，死亡率为41．7％，其中有2只成年母兔和63只25～50日龄幼兔。 相似文献
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四川青衣江、岷江流域鹅观草遗传多样性的溶蛋白分析 总被引：4，自引：0，他引：4
用酸性聚丙烯酰胺凝胶电泳(A-PAGE)技术对采自青衣江流域和岷江流域的97份鹅观草材料的种子醇溶蛋白进行了分析。在对四川青衣江、岷江流域鹅观草居群的醇溶蛋白分析中,鹅观草材料醇溶蛋白带谱存在显著差异,共出现27个条带,其中多态性条带25条,占总条带数的92.59%;鹅观草的遗传相似性与其地理分布较为一致,表现在:1)青衣江、岷江流域鹅观草总遗传多样性指数为0.345 1,其中青衣江流域鹅观草遗传多样性指数为0.340 0,岷江流域鹅观草遗传多样性指数为0.310 0,表明青衣江流域鹅观草比岷江流域存在更为丰富的遗传变异,多样性指数更高;但流域间遗传分化系数仅为0.04,表明两江流域间遗传分化较小;各居群间遗传变异系数达0.326,表明总遗传多样性的32.6%来自居群间。2)在同一流域不同居群也存在遗传分化,其中青衣江流域各居群(除峨眉山居群分散聚在各居群外)能聚在一起;而岷江流域各居群在成都平原区段互相渗透,但能以上、中、下游区段聚开;青衣江流域各居群中以蒙山居群遗传多样性指数最高,达0.339 8,洪雅居群最低,仅0.094 7;岷江流域上游居群多样性指数最高,为0.301 7,而下游以乐山居群遗传多样性指数最低,为0.131 7。3)同一居群内鹅观草存在遗传变异,两江流域以蒙山居群变异最大,多样性指数最高。对居群遗传多样性的研究还表明,鹅观草垂直分布的遗传多样性高于水平分布;在成都平原居群由于生境片断化,导致岷江流域鹅观草生境片断化后小居群遗传分化增加,而整个成都平原“大居群”遗传多样性降低。 相似文献
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对岷江上游地区城市绿化和“亮河工程”草坪建植与管理中存在的问题进行了分析,评价了草坪质量现状,分析了影响草坪质量的因素,并根据岷江上游地区的气候和土壤条件提出了防止草坪退化的对策。 相似文献
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Travis EK Junge RE Terrell SP 《Journal of the American Veterinary Medical Association》2007,230(10):1524-1529
CASE DESCRIPTION: 4 captive adult Micronesian kingfishers (Halcyon cinnamomina cinnamomina) at 3 zoologic institutions were examined routinely or because of dyspnea or lethargy. CLINICAL FINDINGS: All birds had marked hepatomegaly. Two birds had dyspnea caused by compression of air sacs by the enlarged liver, and 1 bird had generalized weakness and lethargy. Three birds had distended coelomic cavities, and 3 birds were thin or had lost weight. There were no consistent abnormalities in blood analytes. Results of most ancillary diagnostic tests such as acid-fast staining of cloacal or fecal swab specimens and culture of feces for acid-fast bacteria were negative. Results of examination of hepatic biopsy specimens in 2 of 4 birds were suggestive of mycobacteriosis. TREATMENT AND OUTCOME: 3 birds died or were euthanized soon after diagnosis. One kingfisher was isolated and monitored for 4 months without treatment and died during anesthesia for disease monitoring. Postmortem histologic examination revealed histiocytic hepatitis and acid-fast bacteria in all 4 birds. Bacteriologic culture of liver specimens yielded Mycobacterium simiae complex in all 4 birds. CLINICAL RELEVANCE: Infection with M simiae complex should be considered in ill Micronesian kingfishers, and further monitoring is warranted to determine whether this is an emerging pathogen in this species. 相似文献
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A. K.Whitfield 《African Zoology》2013,48(3):166-169
The migration of juvenile fishes (<5 cm) into the temporarily open Mhlanga estuary was monitored to determine the effects of different opening periods on immigration. The estuary opened at the end of January 1978 following a nine month closed phase. Only two marine species were recorded entering the estuary in February, compared to 11 species in November 1978. The estuary was closed between April and September. The large November recruitment may be attributed to the abundance of juvenile fishes in the sea adjacent to the estuary, whereas by February very few juveniles were present in Natal inshore waters. Estuarine and freshwater fish species were found to breed inside the estuary during the closed phase when environmental conditions were relatively stable. Mechanisms employed by these species to prevent eggs and larvae from being swept out to sea are discussed, as are strategies used by marine species to ensure recruitment during the very short open phase of the estuary. 相似文献
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野生狗牙根与假俭草电导率测定 总被引：9，自引：0，他引：9
采集四川岷江流域、青衣江流域以及成都、雅安、天全、茂县等11个市县不同居群的野生狗牙根和野生假俭草材料,在四川农业大学草学系新试验基地内进行田间栽培试验并结合实验室测定,对其电导率进行了测定,并以此为依据鉴定其抗寒性的强弱。试验结果表明,野生狗牙根中电解质渗透率最大的是11号宜宾狗牙根(47.1%),最小的是12号宜宾狗牙根(34.6%);野生假俭草材料中电解质渗透率最大的是4号乐山假俭草(42.9%),最小的是1号雅安假俭草(27.2%);在所试材料中抗寒性最强的狗牙根是12号宜宾狗牙根,假俭草则是1号雅安假俭草。 相似文献
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T. Wooldridge 《African Zoology》2013,48(2):307-321
Mgazana, a mangrove estuary inTranskei, was investigated from May 1972 to March 1973 at six-week intervals. Salinities were consistently above 25 parts per thousand in the middle and lower estuary. In the upper estuary the salinity varied between 4 and 29 parts per thousand. Water temperatures varied between I5,5°C and 28°C. One hundred and fifteen taxa of zooplankton organisms were recorded in the samples. The copepods Acartia naialensis and Oithona brevicornis reached high population densities and numbers exceeding 100 000/m3 of water were recorded. Mysids were major contributors to zooplankton biomass. A maximum biomass of I 200 mg/m3 was recorded in February in the middle estuary and was attributed to the mysid Mesopodopsis africana. Species of mysids showed clear seasonal and spatial patterns of distribution in the estuary. 相似文献
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J.F.K. Marais 《African Zoology》2013,48(3):96-104
The effect of river flooding during July and August 1979 on fish populations in two eastern Cape estuaries is compared. It is shown that floods of varying intensity occur regularly in these estuaries. Fish populations in the two estuaries, namely the Swartkops and the Sundays, were differently affected: members of the family Mugilidae increased in numbers in the Swartkops estuary after the floods but decreased to insignificant numbers in catches in the Sundays estuary for a number of months after the floods. It is postulated that mud and silt which are deposited in the Swartkops during the flood serve as a food source for the mullet whereas the rich surface benthos layer of a channel-like estuary like the Sundays is washed away by heavy floods. 相似文献
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A 4-yr-old male Micronesian kingfisher was suspected of having an aspergillus infection. The infection was thought to be related to stress associated with movement to a new enclosure/exhibit and cage-mate aggression. The diagnosis was based on an elevated white cell count, positive antibody and antigen aspergillus titers, and abnormal plasma protein electrophoresis characterized by a moderate elevation of alpha2 and severe elevation on the beta protein fractions. The bird was treated with antifungal medication administered systemically and by nebulization for 10 wk. Response to treatment was monitored by serial white cell counts and plasma electrophoresis. Clinical improvement in this bird was correlated with a return of the white blood cell count to normal levels and what was considered a normal protein electrophoresis distribution. 相似文献
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P.F.S. Mulder 《African Zoology》2013,48(1):15-24
Studies on bivalves in the Swartkops estuary have indicated that spatfall occurs during late summer. After adult populations had been dtc'nvttfrrt by floods in 1971 spat made up a large proportion of the bivalve population in 1973. Growth rates vary at different intertidal levels and in different parts of the estuary and growth has been shown to vary seasonally. In two species age determinations from growth rings corresponded well with age determinations from size frequency histograms. 相似文献