Results 41 to 50 of about 33,315 (152)
Landscape‐scale predictions of future grassland conversion to cropland or development
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Grassland conservation planning often focuses on high‐risk landscapes, but many grassland conversion models are not designed to optimize conservation planning because they lack multidimensional risk assessments and are misaligned with ecological and conservation delivery scales.
Kevin W. Barnes +2 more
wiley +1 more source
野生动物学报, 2015 目前,在石林龙晖野生动物科研中心有限公司饲养场里有80头犀牛,在人工圈养时,每头犀牛的采食量也不尽相同,采食量的多少受很多方面的影响,比如年龄、性别、体重、活动量、饲草的适口性等。通过长时间的观察,大多数犀牛更喜欢采食黑麦草、苜蓿干草、玉米秸秆、野豌豆等饲草,所以在饲养场里我们以这几种饲草作为主要饲草来对白犀牛进行人工饲喂。本文通过白犀牛日采食量和营养需要量来确定其合理的饲喂方案,这种方法更有利于白犀牛的科学饲养,在保证其日采食量的基础上,满足其营养需要,使白犀牛达到健康标准。
李佳晶 马成志 王 宇
doaj
, 2001 <正> 世界鲸类动物的人工饲养已经有100多年的历史,鲸类动物的人工饲养不但为人们提供了一种非常有趣的娱乐项目,而且为深入研究、繁殖和保护鲸类动物提供了很好的条件 ...
刘仁俊,张先锋
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Veterinary Dermatology, Volume 36, Issue 1, Page 74-82, February 2025.Background — Anal sac impaction is common in dogs and manual expression may be effective, yet recurrence remains a problem. To facilitate physiological emptying of the sacs, it is important to maintain a bulky stool consistency. Objectives — The study evaluated if supplementation with ProGlan, a complementary feed containing Bacillus velezensis C‐3102 ...
Marta Salichs +2 more
wiley +1 more source
, 2001 本发明提供一种低成本家蚕人工补饲料及饲育方法，其组分为基础饲料95.5～99.5％(重量)、添加剂0.5—4.5％(重量)。基础饲料为畜禽饲料原料，添加剂包括营养成分和诱食成分等。该人工补饲料为不含桑叶粉和赋形剂的粉状饲料，直接撒布在桑叶上混匀后饲喂5龄或4—5龄普通品种家蚕，补饲量占正常桑叶用量的5—75％，该人工补饲料符合家蚕营养需要，蚕茧产量高，品质好，成本低廉，加工、贮藏、运输 ...
张剑宏 +9 more
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Integrative Conservation, Volume 3, Issue 4, Page 353-367, December 2024.The One Plan Approach to Conservation of the International Union for Conservation of Nature highlights the importance of combining on‐site conservation actions with captive breeding efforts. Among vertebrates, amphibians are one of the groups with the highest proportion of species threatened with extinction.
Marie Borgwerth +6 more
wiley +1 more source
, 2006 该试验以农业生态学、农业种植学、农业植物学、农业经济学为理论指导,以农区发展畜牧业为研究基础,试验结合推广,深受农民欢迎,取得良好的经济、生态和社会效益。1、利用农田防护林遮荫协地,发展豆科饲料牧草--苜蓿,解决了协地作物生长不良的问题,增加了协地土壤氮肥量,改善了土壤,起到充分利用土地、增产增收作用。2、建立农牧一体化连锁高效生产模式,种养结合,用科学方法,指导农民用农副产品饲养农畜。3、变粗饲料喂养为精加工饲料 ...
马世忠等
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Conservation Biology, Volume 38, Issue 5, October 2024.Abstract Illegal poaching and overexploitation for the international pet trade are among the greatest threats to freshwater turtles in Southeast Asia. Expanding consumer research in China is crucial to filling knowledge gaps about the scale and structure of illegal trade and developing audience‐targeted and relevant interventions that may reduce demand
Wuji Zheng +10 more
wiley +1 more source
野生动物学报, 1994 四例海狸鼠剖腹产手术的报告契钟源，金昌深，张仲文，黄在植，朴敬爱，许应天，李文学，李录柱（延边农学院兽医系龙井１３３４００）近年来，随着野生动物养殖业的发展，海狸鼠的饲养专业户越来越多。这是由于饲养海狸鼠投资少、见效快、易饲养、饲料广、成本低、适应性...
契钟源 +7 more
doaj
, 2001 近些年来,有越来越多的人开始养殖水蛭,由于人们对这一行业缺乏了解,对一些致富小册子和小报里出现的大量有关水蛭养殖的诱人信息,如养水蛭投入少、易饲养、繁殖快(每只产卵3～4次,1000粒以上)、利润高(1亩水面可获利数万元)等等,不能分辨真伪,盲目引种后,致使一些急于致富的养殖户蒙受了很大损失。 为使读者对水蛭的饲养与繁殖能有全面、客观的认识,本刊特邀请中国科学院水生生物研究所研究员、我国著名蛭类动物专家杨潼撰写了“关于宽体金线蛭的饲养与繁殖”一文 ...
杨潼
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