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Julian E. Garcia-Rejon Ingrid Y. Cab-Cauich Julio C. Tzuc-Dzul Nohemi Cigarroa-Toledo Wilbert A. Chi-Chim Jose I. Chan-Perez Karla Y. Acosta-Viana Carlos M. Baak-Baak 《Open Veterinary Journal》2023,13(1):20
Background:Hematophagous mites affect numerous bird species, causing severe injuries to the budgerigars. Some species can cause dermatitis in humans.Aims:The purpose was to morphologically identify the mites related to budgerigars (Melopsittacus undulatus) and their nests in Yucatan, Mexico.Methods:In May 2022, a private budgerigar hatchery was visited and mites were collected from the bodies of the birds and their nests. The morphological traits of the mites were confirmed by scanning electron microscopy.Results:Four of 30 birds showed severe clinical signs of mite infestation. The Budgerigars revealed lesions in the cere, nostrils, eyelids, beak, and paws. The bird’s skin showed signs of dryness and beige coloring. The birds with severe damage also presented anorexia and had deformed paws and beaks. The parasitosis was caused by the “burrowing mites,” Knemidocoptes pilae. The burrowing mites and the Grallacheles bakeri were recovered and identified from paw scabs. To eliminate mites, a topical application of Ivermectin was administered to the necks of the birds. The dose was a single, which has a residuality of 21 days. Two drops (0.115 mg/ml) of ivermectin were applied to each bird. A gradual reduction in crusted lesions due to mite mortality was noted. The “tropical fowl mite” Ornithonyssus bursa was identified in the nests, which represents the first record in Mexico.Conclusions:Three species of mites were discovered in a single budgerigar hatchery. This emphasizes the importance of deworming birds and keeping a clean environment in their cages to reduce the potential for parasitic mite infestation. 相似文献
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对西藏“一江两河”流域越冬黑颈鹤( Grus nigricollis)种群数量及分布情况进行了调查,并分析了黑颈鹤昼间活动生境和人为干扰情况。结果表明:2010年12月—2011年1月、2012年12月—2013年1月、2015年1月在“一江两河”流域越冬的黑颈鹤数量分别为6041、59496、496只。拉孜到南木林之间雅鲁藏布江中上游河谷和墨竹工卡到林周之间的拉萨河-澎波河谷一区是越冬黑颈鹤最为集中的2个区域;黑颈鹤昼间活动的主要生境是农田和水体,在这2种生境活动的黑颈鹤集群分别占集群总数( n=125)的80.8%和17.6%;12.0%的越冬黑颈鹤集群受到人为干扰的影响,其中69.2%的干扰来自开发建设。 相似文献
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Mark Everard 《水产资源保护:海洋与淡水生态系统》2008,18(6):1052-1061
- 1. To assess the efficacy of environmental management policies and practices, there is a progressive transition from monitoring of activities towards assessment of their outcomes for the environment.
- 2. Population trends of key taxonomic groups can serve as useful indicators of broader environmental integrity and health. Several necessary and desirable criteria for selecting meaningful and suitable indicators are discussed. The attributes of a range of taxa and survey methods used for their assessment are discussed with reference to these criteria.
- 3. Survey methods, data holdings and analytical methods for populations of wild birds at present provide a good basis for developing indicators of the quality of fresh waters at a landscape scale. Other taxa are not necessarily any less appropriate; however, survey design and data representativeness are often limiting factors to the use of other taxa for assessing geographic and temporal trends.
- 4. Taxonomic science and ecological monitoring are necessary for determining society' progress with sustainable development and for informing appropriate enhancements to policy and management practice, particularly so for fresh waters.
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浙江江山市林区食虫鸟类初步调查 总被引:2,自引:1,他引:2
本文报道了1987~1989年在江山市林区鸟类调查的初步结果。记录鸟类102种,隶属12目29科。留鸟52种,冬候鸟32种,夏候鸟18种。其中重要的食虫鸟类有46种,值得很好保护,特别是在该区繁殖的鸟类。文末记述了6种鸟巢。 相似文献
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精河县荒漠林鼠害猛禽天敌招引初报 总被引:5,自引:2,他引:5
设立了栖架和人造巢箱招引猛禽防治荒漠林鼠害,初步结果表明:猛禽对栖架的利用率依季节不同,可达40%~90%.栖架下发现大量猛禽的吐物,其中含有害鼠的骨骼和毛发;至少一种猛禽——红隼(Falco tinnunculus)可在人造巢箱中繁殖:初步调查表明在非繁殖季节,猛禽对栖架的利用表现为广利用、低频率的特点,在繁殖季节则表现为高频率、局限性而形成明显巢区。 相似文献
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厦门高崎国际机场鸟类调查及鸟撞防治的对策 总被引:9,自引:0,他引:9
厦门机场及周边活动的常见鸟类共有30科,90种,在整个锥形面内对飞机飞行构成危险的鸟类,主要是白鹭Egretta garzetta,中白鹭E.intermedia,普通鸬鹚Phalacrocorax carbo,黑翅鸢Elanus caeruleus,山斑鸠Streptopelia orientalis,家鸽等大型鸟类;根据各种鸟类习性及其栖息生境的特点分析,提出了以鸣枪,放煤气炮等方式驱赶鸟类。改变鸟类栖息生境以降低鸟类的种群数量等防止鸟撞的对策。 相似文献
9.
Naugle David E. Higgins Kenneth F. Nusser Sarah M. Johnson W. Carter 《Landscape Ecology》1999,14(3):267-276
We evaluated the influence of scale on habitat use for three wetland-obligate bird species with divergent life history characteristics and possible scale-dependent criteria for nesting and foraging in South Dakota, USA. A stratified, two-stage cluster sample was used to randomly select survey wetlands within strata defined by region, wetland density, and wetland surface area. We used 18-m (0.1 ha) fixed radius circular-plots to survey birds in 412 semipermanent wetlands during the summers of 1995 and 1996. Variation in habitat use by pied-billed grebes (Podilymbus podiceps) and yellow-headed blackbirds (Xanthocephalus xanthocephalus), two sedentary species that rarely exploit resources outside the vicinity of nest wetlands, was explained solely by within-patch variation. Yellow-headed blackbirds were a cosmopolitan species that commonly nested in small wetlands, whereas pied-billed grebes were an area-sensitive species that used larger wetlands regardless of landscape pattern. Area requirements for black terns (Chlidonias niger), a vagile species that typically forages up to 4 km away from the nest wetland, fluctuated in response to landscape structure. Black tern area requirements were small (6.5 ha) in heterogeneous landscapes compared to those in homogeneous landscapes (15.4–32.6 ha). Low wetland density landscapes composed of small wetlands, where few nesting wetlands occurred and potential food sources were spread over large distances, were not widely used by black terns. Landscape-level measurements related to black tern occurrence extended past relationships between wetlands into the surrounding matrix. Black terns were more likely to occur in landscapes where grasslands had not been tilled for agricultural production. Our findings represent empirical evidence that characteristics of entire landscapes, rather than individual patches, must be quantified to assess habitat suitability for wide-ranging species that use resources over large areas. 相似文献
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