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祁连山东缘高原鼢鼠对溴敌隆的敏感性与适口性测定实验
高原鼢鼠 溴敌隆 敏感性 适口性
2020/5/28
测定祁连山东缘高原鼢鼠对抗凝血杀鼠剂溴敌隆的敏感性与适口性水平,为野外采用溴敌隆鼠药防制高原鼢鼠提供科学依据。方法 于2018年7-8月,在祁连山东缘天祝地区采用捕鼠笼非损伤捕获活的高原鼢鼠,实验室环境下单鼠单笼饲养,采用无选择性摄食试验,连续喂食1、3、5和7 d 0.000 5%的溴敌隆毒饵,记录高原鼢鼠取食和死亡情况,使用SPSS 19.0软件Bliss计算机程序,拟合回归分析,计算半致死喂...
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How Tails Help Geckos and Other Vertebrates Make Great Strides(图)
Tails Geckos Other Vertebrates Great Strides
2017/9/20
A wagging tail is often associated with dogs’ emotions, but the side-to-side motion may also help them take longer strides and move faster, according to a study by researchers at the University of Cal...
Over the last 50 years, international public concern regarding human impact on the environment has increased drastically. Specific to the maritime domain, attention has more acutely focused during the...
2009年6—7月间从赣江上游流域的70个采样点共采集到大型底栖动物33种,其中软体动物门23种、环节动物门7种、节肢动物门3种,主要优势种为河蚬(Corbicula fluminea)和耳型河螺(Rivularia auriculata).为了较好地了解大型底栖动物的群落分布特征,根据支流汇流和生境状况,将上游流域划分成6个区域.对6个区域的多样性、多维尺度等的分析结果表明,不同区域间大型底栖动...
运用电子鼻检测鲐鱼的挥发性成分变化,并结合化学方法测定挥发性盐基氮、组胺、pH值以及鲐鱼质构,综合分析低值青皮红肉鱼-鲐鱼在常温、4℃和-20℃下新鲜度及品质变化情况。结果表明,在常温以及4℃贮藏条件下,电子鼻主成分分析(PCA )可以区分不同贮藏天数的鲐鱼,而在-20℃,PCA的累积贡献率只有74.77%,不能有效区分开。在常温贮藏,TVB-N、组胺和pH值各项指标检测第1天,鱼肉即开始发生腐败...
渔山岛岩石相潮间带大型底栖动物物种多样性
渔山岛 海洋特别保护区 底栖动物 多样性
2011/11/17
为系统研究渔山岛潮间带大型底栖动物群落结构与生物多样性, 作者于2009年3月至2010年1月在该岛潮间带布设5条断面进行了4个季节的取样, 调查大型底栖动物种类组成、生物量和丰度, 并分析了多样性状况。结果显示: 共鉴定出大型底栖动物100种; Shannon-Wiener多样性指数(H')、Pielou均匀度指数(J)、Margalef物种丰富度指数(R)和Simpson多样性指数(D)的周年...
根据步氏巨猿与伴生动物牙釉质稳定碳同位素分析探讨其食性及栖息环境
步氏巨猿 食性 稳定性碳同位素 栖息环境
2013/8/30
分析研究了湖北建始龙骨洞和广西柳城巨猿洞8 枚巨猿牙齿及9 种伴生哺乳动物24 枚牙齿的釉质稳定碳同位素比例, δ13C 值(PDB)为-18.8‰~-14.1‰, 其中建始4 个巨猿牙齿的釉质δ13C 值为-18.2‰~-14.2‰, 柳城4 个巨猿牙齿釉质的δ13C 值为-17.5‰~-16.8‰. 数据结果表明巨猿及伴生动物群的食性均为纯C3 食性. 依据C3 植物的分布规律、相关地区植被的...
Large Tandem, Higher Order Repeats and Regularly Dispersed Repeat Units Contribute Substantially to Divergence Between Human and Chimpanzee Y Chromosomes
Large Tandem Divergence Between Human Chimpanzee Y Chromosomes
2011/1/5
Comparison of human and chimpanzee genomes has received much attention, because of paramount role for understanding evolutionary step distinguishing us from our closest living relative. In order to co...
贵州毕节扒耳岩巨猿动物群的年代与环境———来自食肉类化石的分析和研究
贵州毕节 扒耳岩动物群 早更新世 食肉类
2014/3/26
贵州毕节扒耳岩为一处新近确认的含巨猿化石的洞穴裂隙堆积,出土了若干伴生动物化石。其中食肉类标本数量不多,历次采集的仅有19件,但基本可以鉴定到种,且大多数具有断代指示意义。这批标本鉴定计有:桑氏硕鬣狗(Pachycrocutalicenti)、中国黑熊原始亚种(Ursusthibetanusprimitinus)、大熊猫小种(Ailuropdamicrota)、拟豺(Cuondubius)和豹(P...
Biometrical Study of Artemia urmiana (Anostraca: Artemiidae) Cysts Harvested from Lake Urmia (West Azerbaijan, Iran)
Artemia urmiana Lake Urmia Iran untreated cyst decapsulated cysts chorion thickness hatching efficiency
2010/3/26
Artemia urmiana was reported from Lake Urmia by Günther in 1899. The objectives of the present study were to investigate the diameter of untreated and decapsulated cysts and chorion thickness at 26 st...
Age, growth, length-weight relationship and reproduction of the striped seabream (Lithognathus mormyrus L., 1758) (Sparidae) in the Beymelek Lagoon (Antalya, Turkey)
Beymelek Lagoon Lithognathus mormyrus age growth length-weight relationship reproduction
2010/3/24
Age, growth, length-weight relationship and reproduction were investigated for striped seabream (Lithognathus mormyrus L., 1758) collected from Beymelek Lagoon (Antalya, Turkey) between February 2006 ...