Results 51 to 60 of about 320 (114)

浅谈野生经济两栖爬行动物

open access: yes野生动物学报, 1982
一提起野生动物,人们自然而然地联想到大熊猫、金丝猴、野骆驼……,或者鸟类中的白马鸡、红腹角雉……。可是,对于脊椎动物五大家族(严格说,另外还有较小的——类圆口动物)中的其余三类,就较少被人注意。其实,鱼、两栖和爬行动物的种数,比鸟、兽的总和要多出一倍左右,它们对人的贡献并不逊色,在某些方面甚至还有独到之处。如果说,鸟、兽和鱼都各有一些长期以来已为人类驯化的种类,那么,在两栖和爬行动物中,还没有一种称得上是家养的动物。下面 ...
赵尔宓
doaj  

Behavioural responses of reptiles to visitors of protected areas in Costa Rica [PDF]

open access: yes, 2016
solo resumenTourists can have a strong impact on the behaviour of wild animals, modifying foraging strategies, diet and habitat use, increasing stress, and altering communication and escaping behaviour. Such behavioural changes have been documented for
Barquero Arroyo, Marco David   +2 more
core  

Impact on species' online attention when named after celebrities

open access: yesConservation Biology, Volume 38, Issue 2, April 2024.
Abstract Celebrities can generate substantial attention and influence public interest in species. Using a large‐scale examination of publicly available data, we assessed whether species across 6 taxonomic groups received more page views on Wikipedia when the species was named after a celebrity than when it was not.
Katie Blake   +3 more
wiley   +1 more source

一个用于区域物种多样性综合评价的指数 [PDF]

open access: yes, 2010
区域尺度物种多样性评价不仅是生物多样性研究的一个重要内容,对于保护区的建设也具有指导意义.选取全国具有代表性的57处自然保护区,构建大尺度陆栖脊椎动物物种多样性数据库,在物种水平上,探讨了一个用于区域物种多样性综合评价的E指数,即给予每个类群相同的权重,由陆栖脊椎动物四大类群综合计算而得.通过对物种丰富度的变形P指数和E指数进行比较,得到以下结论:E指数与物种丰富度有着极显著的相关性,二者都能用来评价物种多样性,但E指数比物种丰富度更能无偏颇地评价区域物种多样性,包含的信息更多 ...
斯琴高娃   +4 more
core  

A brief analysis on the similarities and differences between the laws and regulations of animal aquatic products in Eurasian Economic Union and similar standards in China [PDF]

open access: yes, 2020
The Eurasian Economic Union (EAEU) was established in 2015. At present, Russia, Kazakhstan, Belarus, Kyrgyzstan and Armenia are member countries. They are all important partners in the construction of the "Belt and Road" initiative.
Hanyang LYU, Xiao CHEN, Zhifeng WANG
core   +1 more source

Review of hyperdispersal in wildlife translocations

open access: yesConservation Biology, Volume 38, Issue 1, February 2024.
Abstract Species translocation is a common tool to reverse biodiversity loss, but it has a high failure rate. One factor that contributes to failure is postrelease hyperdispersal, which we define as the long‐distance movement of individuals resulting in their failure to contribute to population establishment.
Jack Bilby, Katherine Moseby
wiley   +1 more source

Study on Reproductive Biology of Poecilia reticulata [PDF]

open access: yes, 2008
观赏水族界流传着一句名言:“始于孔雀,精于七彩,终于孔雀。”由此可知孔雀鱼的魅力远远胜过任何种类鱼。孔雀鱼作为一种商品化的观赏鱼,与雌鱼比较,雄鱼拥有更加艳丽的颜色和优美的体型,所以雄鱼更加畅销,并且价格比雌鱼高出许多。如何提高雄鱼产量是生产养殖上迫切需要解决的问题。一般来说基因操作和激素处理是鱼类养殖中性别控制的主要方法。近年来,已有多位学者对孔雀鱼进行了外源激素的不同处理,并取得一定成果。但是激素处理需要技术熟练人员和昂贵的开支,并且容易导致内分泌紊乱。所以急需寻找一种更加温和,廉价 ...
熊正
core  

扬子鳄气管及肺显微和超微结构的观寨

open access: yes野生动物学报, 1995
扬子鳄气管及肺显微和超微结构的观寨潘鸿春,陈壁辉,唐剑云,华田苗(安徽师范大学生物系芜湖市241000)爬行动物的肺较温血动物简单,支气管不再分支,肺内是由肺上皮与结统组织所组成的隔膜互相交叉连接把内腔分隔成呈蜂窝状的小室。爬行纲中蛇类、渐赐类及龟类...
潘鸿春   +3 more
doaj  

The bioactivities of crocodile (Crocodylus siamensis) blood [PDF]

open access: yes, 2015
鳄类俗称鳄鱼,属爬行纲,鳄目,全世界共有3科23种,主要分布在热带和亚 热带地区,具有重要的生态、社会和经济价值。鳄鱼养殖业可以回溯到很久以前, 其主要目的在于给国际奢侈品市场提供皮草,而其他部分则被当作生产废物投喂 给其他鳄鱼。鳄鱼血,含有丰富的蛋白质、氨基酸、不饱和脂肪酸、维生素和多 种微量元素,可提高人体免疫力,对抗多种病毒侵袭,同时,其抗菌抑菌特性和 食用安全性也得到了广泛关注。为了更合理利用和开发鳄鱼资源,本文以新鲜鳄 血制备的鳄血粉为原材料,对其具体成分和实用安全性进行初步评估。同时,在 ...
张紫然
core  

江、浙、皖鼋资源及其保护对策

open access: yes野生动物学报, 2004
鼋俗称“癞头鼋”,“烂团鱼”,属脊椎动物门,爬行纲,龟鳖目,鳖科,鼋属,是我国内陆爬行动物中个体最大的珍稀水生动物,被列为国家一级重点保护动物。但到目前为止这种与大熊猫和扬子鳄齐名的物种根本没有得到各方的高度重视,并且由于鼋栖息地生境的不断恶化及人类的乱捕,致使其分布区逐渐缩小,种群数量逐渐减少。鉴于此,我们于2003年10月26 ...
陶峰勇, 王小明
doaj  

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