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Palm wine and fruit yield responses of oil palm (Elaeis guinensis) trees to pruning frequency and season in the rain forest ecology of southern Nigeria 尼日利亚南部雨林生态中油棕(Elaeis guinensis)树的棕榈酒和果实产量对修剪频率和季节的响应
Pub Date : 2018-11-23 DOI: 10.15406/IJAWB.2018.03.00133
Ubi Godwin Michael
During the early days of commercial oil palm cultivation in Southern Nigeria, it was thought desirable to prune the leaves subtending female inflorescences to allow the bunches room to develop.1,2 This practice often led to as many as 15% of the green leaves being pruned. Doubts about the wisdom of this standard of pruning led to two experiments being laid out for this study. The results of these experiments Rutger3 showed that any pruning in excess of cutting the leaf subtending a ripe bunch led to a reduction in yield. The experiments did not have any treatment with less severe pruning. Bunting et al.,4 stated that the principle that pruning showed never removed more leaves in a year than are produced by the palm in a year. In another experiment, Ubi et al.,5 favored considerably less pruning and mentioned that although only dead and withered leaves should be pruned, harvesting made it necessary that the leaf subtending a bunch should be cut at the same time as the bunch.6,7 The authors also quoted Rutgers1 as stating that severe pruning led to an immediate increase in yield which was then followed by a serious decline from which the palms eventually recovered. In West Africa, pruning practices have been based on regular cleaning rounds aimed at removing only the dead and dying leaves8,9 Bunting et al.,4 presented the chemical analyses of 20 leaves (one year’s production). N – 38%; P – 6%; K – 8%. It can clearly be seen that the removal of large number of leaves from the field will bring a rapid drop in fertility of the soil. It was in consideration of these facts and the need to take a close study of pruning effect on palms of Southern Nigeria that this study was undertaken to examine the effect of some pruning experiments of oil palm in Southern Nigeria. Materials and methods
在尼日利亚南部商业油棕种植的早期,人们认为修剪与雌花相对的叶子是可取的,这样可以让束有足够的空间生长。这种做法经常导致多达15%的绿叶被修剪。对这种修剪标准是否明智的怀疑导致了为这项研究安排了两个实验。这些实验的结果表明,任何修剪超过了对成熟束的叶片的修剪都会导致产量下降。实验中没有任何修剪程度较轻的处理。Bunting等人,4指出,修剪的原理表明,在一年中,棕榈树所产生的叶子永远不会比它所移除的叶子多。在另一项实验中,Ubi等人(5)倾向于少修剪,并提到虽然只修剪枯死和枯萎的叶子,但收获时必须同时修剪束上的叶子。6,7作者还引用了rutgers的说法,即严格的修剪导致产量立即增加,随后又严重下降,棕榈树最终恢复。在西非,修剪的做法是基于定期的清洁轮次,目的是只去除枯死和垂死的叶子8,9,Bunting等人4提出了20片叶子(一年的产量)的化学分析。N - 38%;P - 6%;K - 8%可以清楚地看到,从地里移走大量的叶子会使土壤的肥力迅速下降。正是考虑到这些事实和需要对尼日利亚南部棕榈树的修剪效果进行仔细研究,才进行了这项研究,以检查尼日利亚南部油棕的一些修剪实验的效果。材料与方法
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引用次数: 0
Pashmina wool–a valuable commodity 羊绒是一种很有价值的商品
Pub Date : 2018-11-16 DOI: 10.15406/ijawb.2018.03.00131
H. Ockerman
The research showed that the animals found in these regions such as yak, sheep and goats play a critical role in allowing humans to exist in a harsh environment. The elevation of these regions is upwards of 4,350 m (14,270 ft.) which causes a lack of oxygen, cold temperatures ranging from –20°C (–4°F) to –40°C (–40°F), strong winds, meager rainfall and lack of vegetation. This report will focus on the domestic Changthangi (or Pashmina) breed which produces wool that is known for its firmness, warmth, durability, lightness, softness and ability to absorb dyes and moisture.
研究表明,在这些地区发现的动物,如牦牛、绵羊和山羊,对人类在恶劣环境中生存起着至关重要的作用。这些地区的海拔高达4350米(14270英尺),导致缺氧,低温范围从-20°C(-4°F)到-40°C(-40°F),强风,雨量稀少,缺乏植被。本报告将重点介绍国内的昌昌吉(或Pashmina)品种,该品种生产的羊毛以其坚固,温暖,耐用,轻盈,柔软以及吸收染料和水分的能力而闻名。
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引用次数: 0
Fish scenario in India with emphasis on Indian major carps 印度的鱼类情况,重点是印度主要的鲤鱼
Pub Date : 2018-11-16 DOI: 10.15406/IJAWB.2018.03.00130
B. Bais
India is the second largest producer of fish next to China and Indonesia ranks third in aquaculture production.1 In India, this sector constitutes about 5% of the global fish production and 3% of the global fish trade. In the world, capture fisheries and aquaculture supplied about 158 million tons of fish in 2012, of which about 136.2 million tons was utilized as food. World per capita food fish supply increased from an average of 9.9 kg (live weight equivalent) in the 1960s to 18.7 kg in 2011 and preliminary estimates for 2012 point to a further increase in fish consumption to 19.2 kg. The per capita availability of fish in India has increased from 3 kg to 9.1 In India, the major carps, Catla (Catla catla), Rohu (Labeo rohita) and Mrigal (Cirrhinus mrigala) are the mainstay of freshwater aquaculture. The major carps are the most preferred farm fishes because of their fast growth and higher acceptability to consumers.2 Indian major carps are the most cultivable fish species in India contributing about 87% of the total freshwater aquaculture production of the country.3
印度是仅次于中国的第二大鱼类生产国,印度尼西亚在水产养殖产量方面排名第三在印度,这一部门约占全球鱼类产量的5%,占全球鱼类贸易的3%。2012年,全球捕捞渔业和水产养殖业供应了约1.58亿吨鱼类,其中约1.362亿吨被用作食物。世界人均食用鱼供应量从20世纪60年代的平均9.9公斤(活重当量)增加到2011年的18.7公斤,2012年的初步估计表明,鱼类消费量将进一步增加到19.2公斤。印度的人均鱼类可得量已从3公斤增加到9.1公斤。在印度,主要的鲤鱼,卡特拉鱼(Catla Catla)、罗胡鱼(Labeo rohita)和Mrigal鱼(Cirrhinus mrigala)是淡水水产养殖的支柱。主要的鲤鱼是最受欢迎的养殖鱼类,因为它们生长快,对消费者的接受度更高印度主要鲤鱼是印度最可养殖的鱼类,约占该国淡水水产养殖总产量的87%
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引用次数: 18
The future survival of African elephants: implications for conservation 非洲象的未来生存:对保护的启示
Pub Date : 2018-10-09 DOI: 10.15406/ijawb.2018.03.00123
A. Chwalibog
In 2007 the elephant population in Africa was estimated at between 470,000 and 690,000. However, this population is rapidly decreasing. Today, African elephants are highly endangered and are listed as ‘vulnerable’ on the International Union for Conservation of Nature Red List. In this review, we outline the major factors affecting the future survival of elephants. We identify elephant poaching in Central Africa as the primary cause of elephants’ decline, and this issue has duly received the majority of attention from conservationists and policy-makers. However, poaching is not the only factor: climate change, habitat loss, and human-elephant conflict also have an adverse impact, and all have received relatively little attention due to the predominant focus on poaching.
2007年,非洲大象的数量估计在47万到69万头之间。然而,这一数量正在迅速减少。今天,非洲象是高度濒危物种,被列入国际自然保护联盟红色名录中的“易危”物种。在这篇综述中,我们概述了影响大象未来生存的主要因素。我们认为中非的大象偷猎是大象数量减少的主要原因,这个问题已经得到了保护主义者和政策制定者的广泛关注。然而,偷猎并不是唯一的因素:气候变化、栖息地丧失和人象冲突也有不利影响,由于主要关注偷猎,所有这些都得到了相对较少的关注。
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引用次数: 8
No effects of drought on the most abundant small Passerine birds in Wetlands of semiarid landscapes 干旱对半干旱湿地中最丰富的小雀形目鸟类没有影响
Pub Date : 2018-09-12 DOI: 10.15406/ijawb.2018.03.00117
I. G. Peiró
Drought is a widespread event chiefly given in areas and regions submitted to a high temperatures and small rainfall as for example wetlands immerse in arid and semiarid landscapes. Climate change is involving considerable territories and likely limits further expansions of water bodies.1,2 In these sectors, wetlands and other wet spaces depend properly of hydrological regimes which are submitted to strong cyclic seasonality. This cyclic seasonality, altered by climate change, is influencing directly the full biodiversity of the fauna and flora of wetlands.3 Fluctuations in flood degrees can provide restrictions of frameworks that run its communities as diversity, eveness, specific turnover, etc4,5 or can provide contractions in the breeding success of birds but no its complete block.6
干旱是一种广泛的事件,主要发生在高温少雨的地区和地区,例如湿地淹没在干旱和半干旱的景观中。气候变化涉及相当大的领土,并可能限制水体的进一步扩大。1,2在这些部门,湿地和其他湿地适当地依赖于受强烈周期性季节性影响的水文制度。这种被气候变化所改变的季节性循环正直接影响着湿地动植物的全部生物多样性洪水程度的波动可以限制其群落的多样性、均匀性、特定周转率等框架,或者可以减少鸟类的繁殖成功率,但不能完全阻止
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引用次数: 1
The present situation of animal protein in Egypt and the role of camels in providing cheap and healthy meat for people in poor greenery lands 埃及动物蛋白的现状以及骆驼在为贫穷的绿色土地上的人们提供廉价和健康肉类方面的作用
Pub Date : 2018-08-22 DOI: 10.15406/IJAWB.2018.03.00113
A. Badawi
In Egypt, there is a great developing gap between public annual demands and available amounts of animal protein. The daily available protein of animal origin is nearly 18.2g/cap/day. This amount is too far from 29.3g/cap/day which has been recommended by the FAO since 1989 as a minimum requirement of animal protein/cap/day for people in the developing countries. In this concern, a task mission was decided by the governmental authorities in charge to reach 24g/cap/ day by year 2017. The following table shows the annual production of animal protein in year 2007 and the forecast production on year 2017 (Table 1).
在埃及,公众年需求量与动物蛋白可用量之间的差距越来越大。每日可获得的动物源性蛋白质接近18.2g/cap/day。这一数字与粮农组织自1989年以来建议的发展中国家人民每天最低动物蛋白摄取量29.3克相差甚远。考虑到这一点,政府主管部门决定在2017年之前达到24克/天的任务任务。下表为2007年动物蛋白年产量及2017年预测产量(表1)。
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引用次数: 15
Foraging ranges in Southern Rockhopper Penguins (Eudyptes chrysocome chrysocome) on Isla Noir, Chile 智利黑岛南跳岩企鹅(eyptes chrysocome chrysocome)觅食范围
Pub Date : 2018-08-01 DOI: 10.15406/IJAWB.2018.03.00109
D. Oehler, M. Marín, Alej, R. Kusch, D. Labruna, L. A. Weakley, W. Fry
The Southern Rockhopper Penguin, Eudyptes c. chrysocome, breeds on the Falkland/Malvina Islands, Isla Pingüino, and Ilsa de los Estados in the Atlantic Ocean and on Barnevelt, Terhalten, Buenaventura, Ildefonso, Noir and Deigo Ramirez islands around Cape Horn in the Pacific Ocean, South America.1‒3 The International Union for Conservation of Nature (IUCN) lists the Southern Rockhopper as Vulnerable on the Red List of Threatened Species.4 This South American population is estimated to consist of approximately 870,000 pairs of which the colonies on the outer island of Chile account for 46% of that total.5 Within this area, the 158,200 pairs on Isla Noir represent the largest concentration of Southern Rockhoppers along the Chilean coast.2,6 The IUCN notes declines in these population of 34% over the last thirty years that may be attributed to egg collection and other anthropogenic pressures have been recorded.7‒9 Hydrocarbon exploitation, interactions with fisheries, climate change, possible competition with increasing pinniped populations and newly developing aquaculture activities involving salmon are additional factors that may have or continue to place pressures on the Southern Rockhopper Penguin.4,10‒15 Mean survival rates in the Southern Rockhopper Penguins, in the Falkland Islands, were 84 to 96%.16
南跳岩企鹅(Eudyptes c. chrysocome)在大西洋的福克兰/马尔维纳群岛、平伊诺岛和伊尔萨·德·洛斯·埃斯塔多斯群岛以及太平洋合恩角周围的巴内维尔特岛、泰尔哈尔滕岛、布埃纳文图拉岛、伊尔德丰索岛、诺伊尔岛和代戈·拉米雷斯岛繁殖。南美洲1 - 3国际自然保护联盟(IUCN)将南方跳岩鸟列为濒危物种红色名录中的易危物种。4南美洲的跳岩鸟种群估计约有87万对,其中智利外岛的种群占总数的46%在这个区域内,黑岛上的158,200对企鹅代表了智利海岸南部跳岩企鹅的最大聚集地。世界自然保护联盟指出,在过去的30年里,这些物种的数量减少了34%,这可能是由于收集卵子和其他人为压力造成的。7-9碳氢化合物的开采、与渔业的相互作用、气候变化、与不断增加的鳍状种群的竞争以及新近发展的涉及鲑鱼的水产养殖活动都是可能对南跳岩企鹅造成或继续施加压力的其他因素。福克兰群岛南跳岩企鹅的平均存活率为84%至96%
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引用次数: 3
Beyond Urbanization 除了城市化
Pub Date : 2018-08-01 DOI: 10.15406/ijawb.2018.03.00107
K. K Dhami
recorded. Despite its well-known and acknowledged significance in terms of biodiversity, Southeast Asia has observed the highest rate of deforestation on the planet in past decade. Almost 15% forest cover was lost in the last 15 years for a progressive increase in the size and populations of its cities. More than 50% of South East Asian urban areas got developed within highly diverse ecoregions that have adversely impacted the protected areas within hotspots of biodiversity. An assessment of urbanization and its impact on biodiversity levels clearly indicates that cities support far fewer species of birds and plants as compared to similar un-urbanized regions. International Union for Conservation of Nature and Natural Resources documents 91,520 species on the IUCN Red List, a list that identifies species that need targeted recovery efforts with special focus on the conservation. The list identifies more than 25,820 species are threatened with extinction globally that include 41% of amphibians, 34% of conifers, 33% of reef-building corals, 25% of mammals and 13% of birds, however, the trend reveals a worrying concentration of Critically Endangered species in southeast Asian hotspots. IUCN Red List of Threatened Species showed that Southeast Asia had by far the highest concentration of species on the edge of extinction of any region in the world as per the comprehensive Global Mammal Assessment, 2008. The region is considered as world’s most threatened region for mammals with some parts of the region to lose 98% of the remaining forests in next decade. Similarly, Southeast Asia that supports the highest mean proportion of endemic (national level) bird species, also has the highest mean proportion of threatened bird species of all tropical regions. Deforestation is the most likely major cause of avian losses in Southeast Asia though avifauna of Southeast Asia remains one of the least studied in the tropics.
记录下来。尽管东南亚在生物多样性方面具有众所周知和公认的重要性,但在过去十年中,东南亚的森林砍伐率是全球最高的。在过去的15年里,由于城市的规模和人口的不断增加,几乎失去了15%的森林覆盖。超过50%的东南亚城市地区是在高度多样化的生态区内发展起来的,这对生物多样性热点地区的保护区产生了不利影响。对城市化及其对生物多样性水平影响的评估清楚地表明,与类似的未城市化地区相比,城市支持的鸟类和植物物种要少得多。国际自然与自然资源保护联盟(IUCN)在红色名录上记录了91520种物种,该名录确定了需要有针对性的恢复努力,并特别关注保护的物种。这份名单确定了全球超过25820种濒临灭绝的物种,其中包括41%的两栖动物、34%的针叶树、33%的造礁珊瑚、25%的哺乳动物和13%的鸟类。然而,这一趋势显示,东南亚热点地区的极度濒危物种集中在令人担忧的地方。世界自然保护联盟濒危物种红色名录显示,根据2008年全球哺乳动物综合评估,东南亚是迄今为止世界上濒临灭绝物种最集中的地区。该地区被认为是世界上哺乳动物最受威胁的地区,该地区的一些地区将在未来十年内失去98%的剩余森林。同样,东南亚拥有最高的地方性(国家级)鸟类物种平均比例,也是所有热带地区受威胁鸟类物种平均比例最高的地区。森林砍伐最有可能是东南亚鸟类损失的主要原因,尽管东南亚的鸟类仍然是热带地区研究最少的鸟类之一。
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引用次数: 0
Sighting of Indian grey hornbill and Rufous woodpecker at Nandankanan Wildlife Sanctuary, Odisha, India 在印度奥里萨邦的南丹卡南野生动物保护区,看到印度灰犀鸟和红褐色啄木鸟
Pub Date : 2018-07-31 DOI: 10.15406/IJAWB.2018.03.00106
R. Mohapatra
Nandankanan Wildlife Sanctuary (NWS) is located between 20o23’08” to 20o24’10”N and 85o48’09” to 85o48’13” E, spreading over an area of 4.37 sq.km in the state of Odisha, Eastern India. The sanctuary enjoys a moderately hot humid climate around 30oC with annual average rainfall of 1350mm. The vegetation is of moist mixed deciduous type.1 There is scanty literature on birds of NWS. Kamal et al.,2 recorded 53 species of birds from “Kanjia” lake of NWS. A checklist of 120 species of birds of 41 families was reported by Panda et al.,3 Mohapatra et al. added one more species i.e., Stork billed kingfisher (Pelargopsis capensis) to the checklist.4 The present note intends to report addition of two new species to the above checklist. The sighted birds are Indian grey hornbill Ocyceros birostris (Scopoli, 1786) (Figure 1). Rufous woodpecker Micropternus brachyurus (Vieillot, 1818) (Figure 2). Both birds were sighted and photodocumented by the author during ad libitum field survey inside the sanctuary area. Both species were identified on site and confirmed.5,6 Indian Grey Hornbill is grey colored with white under parts, red iris & a tail with white tip and dark sub-terminal band. The bill is darkgrey to black surmounted with a casque extending upto the point of curvature in the bill. Rufous Woodpecker is a medium sized rufous colored bird with short black bill and black barring on the wing and tail. The bird lacks a crest. Male has crimson patch on ear covert which is pale buff in case of female.5,6
南丹卡南野生动物保护区(NWS)位于北纬2023′08”至2024′10”,东经8548′09”至8548′13”之间,面积4.37平方公里。在印度东部的奥里萨邦(Odisha),这是一场灾难。保护区气候温和湿热,约摄氏30度,年平均降雨量1350毫米。植被为湿润混合落叶型1关于西北地区鸟类的文献很少。Kamal et al,2在NWS“Kanjia”湖记录了53种鸟类。Panda等人报告了41科120种鸟类的清单,3 Mohapatra等人又增加了1种,即鹳嘴翠鸟(Pelargopsis capensis)本注拟报告在上述清单中增加两个新物种。观察到的鸟类有印度灰犀鸟cyceros birostris (Scopoli, 1786)(图1)和红褐色啄木鸟Micropternus brachyurus (Vieillot, 1818)(图2)。作者在保护区内进行随意野外调查时发现并记录了这两种鸟类。这两种物种都是在现场发现并确认的。5,6印度灰犀鸟是灰色的,身体下部为白色,虹膜为红色,尾部为白色,末端为黑色。鸟喙呈深灰色至黑色,顶部有一层羽饰,一直延伸到鸟喙的弯曲点。棕褐色啄木鸟是一种中等大小的棕褐色鸟类,喙短而黑,翅膀和尾巴上有黑色的条纹。这只鸟没有羽冠。雄性的耳朵上有深红色的斑点,雌性的耳朵上有淡黄色的斑点
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引用次数: 2
Why are marine ecosystems biologically more diversified than their equivalent terrestrial ecosystems? 为什么海洋生态系统在生物学上比同等的陆地生态系统更多样化?
Pub Date : 2018-07-31 DOI: 10.15406/IJAWB.2018.03.00105
S. Tadesse
On the other hand, terrestrial ecosystems are ecosystems that are found only on landforms. They mainly support a community of organisms and their environment that occurs on the land masses of continents and islands. The base of the food web in the terrestrial ecosystems is occupied by green plants, which are the only organisms capable of utilizing the energy that comes from the sun and inorganic nutrients obtained from the soil to produce organic molecules.1 Even though the tropical rain forest ecosystem is biologically more diversified, the other terrestrial ecosystems, such as tundra (i.e. arctic), taiga (i.e. boreal forests), temperate deciduous forests, Mediterranean shrub-land, mountains, temperate grasslands, tropical savannah, and desert ecosystems are biologically less diversified than their equivalent marine ecosystems.1–5
另一方面,陆地生态系统是只存在于地貌上的生态系统。它们主要支持大陆和岛屿上的生物群落及其环境。陆地生态系统中食物网的基础是绿色植物,它们是唯一能够利用来自太阳的能量和从土壤中获得的无机营养物质来产生有机分子的生物尽管热带雨林生态系统在生物学上更加多样化,但其他陆地生态系统,如冻土带(即北极)、针叶林(即北方针叶林)、温带落叶森林、地中海灌丛地、山地、温带草原、热带稀树草原和沙漠生态系统在生物学上的多样性不如同等的海洋生态系统1 - 5
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引用次数: 1
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International International Journal of Avian & Wildlife Biology
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