好消息

正种子联动植树节微博绿动全国高校3月12日迎来了我国第36个植树节,"种子变绿植,绿动我校园"第四届全国大学生绿植领养活动也在全国1200所高校陆续启动。仅3月12日当天就有超过5万名大学生通过绿植领养虚拟点进行签到,复旦大学、浙江大学等601所高校植树节当天举办了本校的绿植领养活动,参与活动的同学只要发送微博#绿植领养#+自己的绿色生活宣言,分享一个自己的低碳生活小习惯,即可获得绿植种子一包。     

大熊猫“性冷淡”或因“亲缘气味”

长期以来，有些圈养的大熊猫到了生殖年龄，却不愿意谈情说爱、性欲低下。北京师范大学等多家单位的一项合作研究表明，这极有可能与大熊猫身上携带的“亲缘气味”有关。研究发现，在每年春夏的大熊猫交配季节，成年雄性大熊猫尿液中所包含的化学物质成分相似性指数，与大熊猫的亲缘关系指数存在显著的相关性。该研究项目负责人刘定震说，“这表明成年雄性大熊猫在繁殖季节的尿液中极有可能包含了‘亲缘气味’，成年雌性大熊猫嗅到了这种气味，并判断出与自己可能存在较近的亲缘关系时，可能就会主动疏远这只雄性大熊猫。     

“团团”、“圆圆”获准入台

大陆赠台大熊猫“团团”、“圆圆”终于获准入台了。台“行政院农委会林务局”近日宣布，台北市立木栅动物园获准输入大熊猫。木栅动物园将成为台湾首家可以展示熊猫的动物园。台园方表示，将组成包含专任兽医、助理、饲养管理员等近10人的团队专职熊猫的饲育工作。还会派员前往大陆，与“团团”、“圆圆”培养感情，以利未来的运送工作。     

大熊猫乳汁水解氨基酸含量的测定分析

收集了一只16岁圈养大熊猫产后d 2,d 3,d 5~9,d 11,d 12和d 17的乳汁样品各1个共计10个,并测定了其17种水解氨基酸(AA)的含量.结果表明,所有样品中G lu的含量最高,其次是Leu、Pro、Asp、Ser等,G ly含量最低.产后d 2~d 6的乳汁样品中AA含量稍有波动,除G ly和Cys外,其余含量从d 7~d 17呈逐渐升高的趋势;除Thr和G ly外,d 12或d 17乳汁样品中其余AA(d 12乳样中Asp除外)的含量都高于d 2的含量.d 2~d 6乳汁中Thr、G ly、Phe和Asp与总AA的比值极显著和显著高于d 7~d 17的(P<0.01和P<0.05),而G lu、Pro和A la(都为非必需氨基酸)比值极显著和显著低于d 7~d 17的(P<0.01和P<0.05).乳汁中非必需氨基酸与必需氨基酸比值(NEAA/EAA)平均值为1.55±0.05.NEAA和EAA都有随泌乳天数延长而逐步升高的趋势.图1表4参11     

悲情5·12

时间永远定格在公元2008年5月12日14时28分。中国四川汶川8.0级大地震震惊世界,华夏同悲,山河共泣……时间在一秒一分飞逝,我们现在还无法静下心来回顾与反思这惊心动魄的日日夜夜。     

绿色搜索

环保法修正草案二审污企逾期不改或按日罚无上限6月26日,十二届全国人大常委会第三次会议二次审议环境保护法修正案草案(以下简称"二审稿")。二审稿对于各级政府及其相关部门负责人对环保不作为等行为加大了处罚力度,或可引咎辞职。对于逾期不改的排污企业受到的处罚或将按日计算,且罚额无上限。     

道,和谐——山水自然保护中心

<正>几年前看过一部叫做"蝴蝶"的电影,讲述一老一小,追寻一只叫做"伊莎贝尔"蝴蝶的故事,相信不少人也会如我一样,一遍又一遍地被这部电影的浓浓温情、唯美画面打动。大自然的生命姿态多姿绽放,但如何与它们相伴相依,这可以作为一个永恒话题被孜孜探索下去。纵然经常有人与自然不和谐的画面出现,但是,有人在行动,有这些个星星之火总可以燎原的NGO们在行动。近日,笔者走     

The rhythm of stereotypic behaviors in captive giant panda (Ailuropoda melanoleuca)北大核心CSCD

Stereotypy can be defined as a repetitive behavioral pattern with no apparent function or target in captivity. It is considered an abnormal behavior in contrast to the behavior in wild habitats and is often used as an important index to evaluate the captive environment, which has a significant scientific value. Many previous studies have focused on the impact of environment on stereotypical behavior; however, the rhythm of stereotypy remains unclear. To determine the mechanism of stereotypy, eight giant pandas (Ailuropoda melanoleuca) were investigated 24 h a day from Jan 2018 to Dec 2019, with focal sampling and continuous recording. No stereotypy in the juveniles was noted, while the adult giant pandas displayed different stereotypies. Mean stereotypy durations were 0.72% of the total activity in circadian rhythm, with a peak of mean durations in all seasons occurring at 7:00 am–9:00 am, while, in spring, there was a peak of mean duration at 1:00 am–3:00 am. Although there was no significant difference, mean stereotypy durations and frequencies in the night were longer than those in the daytime. Mean stereotypy frequencies in spring reached the highest level, whereas mean stereotypy durations in winter were maximal. The adult giant pandas in the daytime showed maximal mean stereotypy durations in winter and minimal mean stereotypy durations in busy seasons (summer and autumn), whereas mean stereotypy durations at night were maximal in busy seasons. Despite no significant differences among these seasons, our results suggest that the stereotypy of giant pandas may have diurnal rhythms and seasonal differences. In light of the similar captive environment between adult and juvenile giant pandas, the appearance of stereotypy may be correlated with age, which may be the effects of the environment or a strategy of adaptation. © 2022 Science Press. All rights reserved.     

圈养大熊猫乳汁营养成分分析及育幼营养对策初探

连续测定了１只１０ａ大熊猫产后１ｍｏ内１２个乳汁样品中水份、粗蛋白（ＣＰ）、粗脂肪（ＥＥ）、粗灰分（ＣＡ）、乳糖（Ｌａｃ）、１７种氨基酸（ＡＡ）、１０种矿物元素、６种维生素的含量．结果表明，大熊猫产后前６ｄ乳汁中多数营养素含量与６ｄ后含量差异明显．产后ｄ１乳汁中ｗ（ＣＰ）＝６．３４％，ｄ５～１５在５％左右；ｗ（ＥＥ）在２．５０％～７．３３％范围内变动；乳糖含量皆在１％左右；大多数维生素和微量元素含量远高于常见的家畜乳和人乳中相应成分的含量．在分析大熊猫乳汁营养成分含量特点的基础上，探讨了育纳营养对策．