文章列表
盘点12种活化石动物：火星蚁入选(图) - 2008-12-09 09:01 AM -
在大自然，有许多物种历经数百万年进化，几乎没有任何变化，因此被生动地称为现代自然界的“活化石”。
科学家公布南极首次发现1224种新物种 - 2008-12-03 03:56 PM -
世界首份有关南极洲海洋与陆地动物目录已经公布有1224种新物种。其中绝大多数是在海洋中发现的，而且大部分都生活在海底
抓小鱼放大鱼，渔业可持续发展新策略 - 2008-12-02 09:11 AM - 环球科学编译 lily
传统渔业一直以“抓大放小”为可持续发展的方针，但是科学家研究发现，或许抓小鱼放大鱼更能保持渔业发展。
鲨鱼等海洋动物长途迁徙而不迷路之谜揭开 - 2008-12-02 08:31 AM -
科学家发现了一些证明海龟和鲑鱼可以读取它们的出生地周围的“地球磁场图”，并将这些“数据”牢记在大脑里的证据。
科学家发现海豚尾巴是其高速游泳的“发动机” - 2008-12-01 02:14 PM -
最近科学家利用最新的科技模拟海豚尾巴产生的推动力，终于破解了海豚的肌肉无法提供海豚高速游泳推动力这一难题。
日17年来首次从外国购买鲸肉 表明支持捕鲸 - 2008-12-01 08:14 AM -
日本共同通讯社11月２９日援引消息人士的话报道，从冰岛进口的鲸肉近期已在日本上市。这是日本１７年来首次从外国购买鲸肉。
《自然》：中美科学家揭开杂交植物优势之谜 - 2008-11-24 05:38 PM -
中美科学家近日研究发现，杂交植物比其亲本生长更大更好的原因在于，它们负责光合作用和淀粉代谢的基因在白天要更为活跃。
澳科学家：人类和袋鼠在1.5亿年前是“一家” - 2008-11-20 09:28 AM -
澳洲大陆特产的袋鼠的基因图谱与人类相似，并且很可能起源于中国。
《科学》：种间遗传交换对植物进化具有重要作用 - 2008-11-14 03:11 PM -
英、美及西班牙科学家近日确定了一种关键的基因，它从生长在意大利西西里的植物转入到了生长在英国的“近亲”。
科学家成功将一年生植物变成多年生植物 - 2008-11-14 08:40 AM - 环球科学编译 李卫霞
一年生植物在一年之内完成其生长、开花结果和死亡和过程，而多年生植物可以过冬，到第二年春天再度枝繁叶茂。
共 226 ,显示 41 - 50 « 上一页 1 2 3 4 5 6 7 8 9 ... 下一页 »
《环球科学》是享誉世界的科普杂志《科学美国人》中文版，由电脑报经营有限责任公司和Scientific American合作推出
Copyrght ? 2006 －2008 Global Science
环球科学杂志社版权所有 未经许可严禁转载
WWW.SCIAM.COM.CN 最佳分辨率 1024×768
网站地址：重庆市渝中区双钢路3号科协大厦12F
读者信箱：cnsciam@gmail.com
渝ICP备06004211号
Thursday, March 5, 2009
环球科学(《科学美国人》中文版)－世界科普杂志第一品牌
点击排行
• 研究发现：卷尾猴可理解“货币”意义
• 德科学家揭示腐尸味巨型鲜花如何吸引昆虫
• 蜜蜂也会“吸毒”上瘾 与人类嗑药反应相似
• 南极反常暴风雨致上万只小企鹅被冻死
• 盘点12种活化石动物：火星蚁入选(图)
• 英国将送蠕虫上太空欲解肌肉萎缩谜底(图)
• 世界自然保护联盟报告：人类近亲面临灭绝危险
• 最新研究显示狗有对与错的概念
• 泰晤士报：全球或面临磷短缺 粮食无肥咋种？
• 美国广告明星黑猩猩袭击人被击毙
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• 盘点12种活化石动物：火星蚁入选(图)
• 鲨鱼的第六感
• 远古觅凶：岛国恐龙死亡之谜
• 美媒体评出十种最可爱动物宝宝
• DNA揭示猫的世系图
• 科学家最想“复活”的10种远古灭绝生物
• 美科学家公布奇妙海洋生物照片(组图)
• 十大深海秘密破解：水下山脉现蛇星之城(组图)
• 全球12大物种进化里程碑：长羽毛的恐龙
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环球科学(《科学美国人》中文版)－世界科普杂志第一品牌－1845年创刊、139位诺贝尔奖得主撰稿、从爱迪生到比尔·盖茨都喜欢阅读 / 地球故事 / 动植物
文章列表
盘点12种活化石动物：火星蚁入选(图) - 2008-12-09 09:01 AM -
在大自然，有许多物种历经数百万年进化，几乎没有任何变化，因此被生动地称为现代自然界的“活化石”。
科学家公布南极首次发现1224种新物种 - 2008-12-03 03:56 PM -
世界首份有关南极洲海洋与陆地动物目录已经公布有1224种新物种。其中绝大多数是在海洋中发现的，而且大部分都生活在海底
抓小鱼放大鱼，渔业可持续发展新策略 - 2008-12-02 09:11 AM - 环球科学编译 lily
传统渔业一直以“抓大放小”为可持续发展的方针，但是科学家研究发现，或许抓小鱼放大鱼更能保持渔业发展。
鲨鱼等海洋动物长途迁徙而不迷路之谜揭开 - 2008-12-02 08:31 AM -
科学家发现了一些证明海龟和鲑鱼可以读取它们的出生地周围的“地球磁场图”，并将这些“数据”牢记在大脑里的证据。
科学家发现海豚尾巴是其高速游泳的“发动机” - 2008-12-01 02:14 PM -
最近科学家利用最新的科技模拟海豚尾巴产生的推动力，终于破解了海豚的肌肉无法提供海豚高速游泳推动力这一难题。
日17年来首次从外国购买鲸肉 表明支持捕鲸 - 2008-12-01 08:14 AM -
日本共同通讯社11月２９日援引消息人士的话报道，从冰岛进口的鲸肉近期已在日本上市。这是日本１７年来首次从外国购买鲸肉。
《自然》：中美科学家揭开杂交植物优势之谜 - 2008-11-24 05:38 PM -
中美科学家近日研究发现，杂交植物比其亲本生长更大更好的原因在于，它们负责光合作用和淀粉代谢的基因在白天要更为活跃。
澳科学家：人类和袋鼠在1.5亿年前是“一家” - 2008-11-20 09:28 AM -
澳洲大陆特产的袋鼠的基因图谱与人类相似，并且很可能起源于中国。
《科学》：种间遗传交换对植物进化具有重要作用 - 2008-11-14 03:11 PM -
英、美及西班牙科学家近日确定了一种关键的基因，它从生长在意大利西西里的植物转入到了生长在英国的“近亲”。
科学家成功将一年生植物变成多年生植物 - 2008-11-14 08:40 AM - 环球科学编译 李卫霞
一年生植物在一年之内完成其生长、开花结果和死亡和过程，而多年生植物可以过冬，到第二年春天再度枝繁叶茂。
共 226 ,显示 41 - 50 « 上一页 1 2 3 4 5 6 7 8 9 ... 下一页 »
《环球科学》是享誉世界的科普杂志《科学美国人》中文版，由电脑报经营有限责任公司和Scientific American合作推出
Copyrght ? 2006 －2008 Global Science
环球科学杂志社版权所有 未经许可严禁转载
WWW.SCIAM.COM.CN 最佳分辨率 1024×768
网站地址：重庆市渝中区双钢路3号科协大厦12F
读者信箱：cnsciam@gmail.com
渝ICP备06004211号
• 研究发现：卷尾猴可理解“货币”意义
• 德科学家揭示腐尸味巨型鲜花如何吸引昆虫
• 蜜蜂也会“吸毒”上瘾 与人类嗑药反应相似
• 南极反常暴风雨致上万只小企鹅被冻死
• 盘点12种活化石动物：火星蚁入选(图)
• 英国将送蠕虫上太空欲解肌肉萎缩谜底(图)
• 世界自然保护联盟报告：人类近亲面临灭绝危险
• 最新研究显示狗有对与错的概念
• 泰晤士报：全球或面临磷短缺 粮食无肥咋种？
• 美国广告明星黑猩猩袭击人被击毙
·更多...
热门文章
• 盘点12种活化石动物：火星蚁入选(图)
• 鲨鱼的第六感
• 远古觅凶：岛国恐龙死亡之谜
• 美媒体评出十种最可爱动物宝宝
• DNA揭示猫的世系图
• 科学家最想“复活”的10种远古灭绝生物
• 美科学家公布奇妙海洋生物照片(组图)
• 十大深海秘密破解：水下山脉现蛇星之城(组图)
• 全球12大物种进化里程碑：长羽毛的恐龙
• 科学家揭示鸟类如何利用地磁迁徙
·更多...
环球科学(《科学美国人》中文版)－世界科普杂志第一品牌－1845年创刊、139位诺贝尔奖得主撰稿、从爱迪生到比尔·盖茨都喜欢阅读 / 地球故事 / 动植物
文章列表
盘点12种活化石动物：火星蚁入选(图) - 2008-12-09 09:01 AM -
在大自然，有许多物种历经数百万年进化，几乎没有任何变化，因此被生动地称为现代自然界的“活化石”。
科学家公布南极首次发现1224种新物种 - 2008-12-03 03:56 PM -
世界首份有关南极洲海洋与陆地动物目录已经公布有1224种新物种。其中绝大多数是在海洋中发现的，而且大部分都生活在海底
抓小鱼放大鱼，渔业可持续发展新策略 - 2008-12-02 09:11 AM - 环球科学编译 lily
传统渔业一直以“抓大放小”为可持续发展的方针，但是科学家研究发现，或许抓小鱼放大鱼更能保持渔业发展。
鲨鱼等海洋动物长途迁徙而不迷路之谜揭开 - 2008-12-02 08:31 AM -
科学家发现了一些证明海龟和鲑鱼可以读取它们的出生地周围的“地球磁场图”，并将这些“数据”牢记在大脑里的证据。
科学家发现海豚尾巴是其高速游泳的“发动机” - 2008-12-01 02:14 PM -
最近科学家利用最新的科技模拟海豚尾巴产生的推动力，终于破解了海豚的肌肉无法提供海豚高速游泳推动力这一难题。
日17年来首次从外国购买鲸肉 表明支持捕鲸 - 2008-12-01 08:14 AM -
日本共同通讯社11月２９日援引消息人士的话报道，从冰岛进口的鲸肉近期已在日本上市。这是日本１７年来首次从外国购买鲸肉。
《自然》：中美科学家揭开杂交植物优势之谜 - 2008-11-24 05:38 PM -
中美科学家近日研究发现，杂交植物比其亲本生长更大更好的原因在于，它们负责光合作用和淀粉代谢的基因在白天要更为活跃。
澳科学家：人类和袋鼠在1.5亿年前是“一家” - 2008-11-20 09:28 AM -
澳洲大陆特产的袋鼠的基因图谱与人类相似，并且很可能起源于中国。
《科学》：种间遗传交换对植物进化具有重要作用 - 2008-11-14 03:11 PM -
英、美及西班牙科学家近日确定了一种关键的基因，它从生长在意大利西西里的植物转入到了生长在英国的“近亲”。
科学家成功将一年生植物变成多年生植物 - 2008-11-14 08:40 AM - 环球科学编译 李卫霞
一年生植物在一年之内完成其生长、开花结果和死亡和过程，而多年生植物可以过冬，到第二年春天再度枝繁叶茂。
共 226 ,显示 41 - 50 « 上一页 1 2 3 4 5 6 7 8 9 ... 下一页 »
《环球科学》是享誉世界的科普杂志《科学美国人》中文版，由电脑报经营有限责任公司和Scientific American合作推出
Copyrght ? 2006 －2008 Global Science
环球科学杂志社版权所有 未经许可严禁转载
WWW.SCIAM.COM.CN 最佳分辨率 1024×768
网站地址：重庆市渝中区双钢路3号科协大厦12F
读者信箱：cnsciam@gmail.com
渝ICP备06004211号
澳科学家：人类和袋鼠在1.5亿年前是“一家”
澳科学家：人类和袋鼠在1.5亿年前是“一家”
2008-11-20 科学网
可爱的澳大利亚袋鼠
澳大利亚研究人员11月18日宣称，澳洲大陆特产的袋鼠的基因图谱与人类相似，并且很可能起源于中国。据悉，这是人类历史上首次成功绘制出袋鼠的基因图谱。有关方面随即发现，不少袋鼠基因除了与人类相同外，就连其排序也一模一样。
最初，研究人员最初怀疑，袋鼠和人类的基因应该“差别巨大”，然而最终的研究成果推翻了这一假设，双方的基因图谱差别不大。有科学家就此推测，袋鼠和人类的共同祖先生活在至少1.5亿年前。此前有研究宣称，人类和老鼠在7000万年前拥有同一个祖先。
上述研究项目还推测，澳洲袋鼠的老家很可能在中国。后来，这种动物首先从中国前往美洲，并经当时很温暖的南极洲来到澳大利亚落户。研究人员表示，如果对袋鼠进行仔细研究，可能为发现1.5亿年前的“人类祖先”到底是个什么样子找到些许有价值的线索。
英国《自然》杂志曾报道说，人和老鼠的基因图谱竟然“基本相同”。比如，人类和老鼠都有大约30000条基因，其中约有80%的基因是“完全一样的”。这项研究最终发现，人和老鼠约共享有99%的类似基因，其中最有意思的是，人类同样具有能“长出尾巴的基因” 。
科学家们指出，正是由于在人基因和老鼠基因之间存在的细小差别(仅仅300条特色基因)，才导致了两个完全不同的哺乳动物的产生。此外，老鼠具有20对染色体，而人类则有23对。今后人们可以通过老鼠来了解各种人体疾病的“致病”基因，并探索根治手段。
尽管老鼠基因比人类的要小14%左右，但是40%的人鼠基因可以“直接组合”。与人类相比，老鼠基因最独特的部分就是具有形成其灵敏嗅觉和强大生殖系统的能力。由于老鼠细胞和器官与人“大同小异”，加上这种动物繁殖力惊人，因此能充当“取之不尽”的人体实验代用品。
上述两项研究得出有趣结果，再度证明了时间与基因变化和重组所带来的神奇力量。
责任编辑: wallsatan
2008-11-20 科学网
可爱的澳大利亚袋鼠
澳大利亚研究人员11月18日宣称，澳洲大陆特产的袋鼠的基因图谱与人类相似，并且很可能起源于中国。据悉，这是人类历史上首次成功绘制出袋鼠的基因图谱。有关方面随即发现，不少袋鼠基因除了与人类相同外，就连其排序也一模一样。
最初，研究人员最初怀疑，袋鼠和人类的基因应该“差别巨大”，然而最终的研究成果推翻了这一假设，双方的基因图谱差别不大。有科学家就此推测，袋鼠和人类的共同祖先生活在至少1.5亿年前。此前有研究宣称，人类和老鼠在7000万年前拥有同一个祖先。
上述研究项目还推测，澳洲袋鼠的老家很可能在中国。后来，这种动物首先从中国前往美洲，并经当时很温暖的南极洲来到澳大利亚落户。研究人员表示，如果对袋鼠进行仔细研究，可能为发现1.5亿年前的“人类祖先”到底是个什么样子找到些许有价值的线索。
英国《自然》杂志曾报道说，人和老鼠的基因图谱竟然“基本相同”。比如，人类和老鼠都有大约30000条基因，其中约有80%的基因是“完全一样的”。这项研究最终发现，人和老鼠约共享有99%的类似基因，其中最有意思的是，人类同样具有能“长出尾巴的基因” 。
科学家们指出，正是由于在人基因和老鼠基因之间存在的细小差别(仅仅300条特色基因)，才导致了两个完全不同的哺乳动物的产生。此外，老鼠具有20对染色体，而人类则有23对。今后人们可以通过老鼠来了解各种人体疾病的“致病”基因，并探索根治手段。
尽管老鼠基因比人类的要小14%左右，但是40%的人鼠基因可以“直接组合”。与人类相比，老鼠基因最独特的部分就是具有形成其灵敏嗅觉和强大生殖系统的能力。由于老鼠细胞和器官与人“大同小异”，加上这种动物繁殖力惊人，因此能充当“取之不尽”的人体实验代用品。
上述两项研究得出有趣结果，再度证明了时间与基因变化和重组所带来的神奇力量。
责任编辑: wallsatan
可爱的澳大利亚袋鼠
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环球科学(《科学美国人》中文版)－世界科普杂志第一品牌－1845年创刊、139位诺贝尔奖得主撰稿、从爱迪生到比尔·盖茨都喜欢阅读 / 地球故事 / 动植物 / 澳科学家：人类和袋鼠在1.5亿年前是“一家”
澳科学家：人类和袋鼠在1.5亿年前是“一家”
2008-11-20 科学网
可爱的澳大利亚袋鼠
澳大利亚研究人员11月18日宣称，澳洲大陆特产的袋鼠的基因图谱与人类相似，并且很可能起源于中国。据悉，这是人类历史上首次成功绘制出袋鼠的基因图谱。有关方面随即发现，不少袋鼠基因除了与人类相同外，就连其排序也一模一样。
最初，研究人员最初怀疑，袋鼠和人类的基因应该“差别巨大”，然而最终的研究成果推翻了这一假设，双方的基因图谱差别不大。有科学家就此推测，袋鼠和人类的共同祖先生活在至少1.5亿年前。此前有研究宣称，人类和老鼠在7000万年前拥有同一个祖先。
上述研究项目还推测，澳洲袋鼠的老家很可能在中国。后来，这种动物首先从中国前往美洲，并经当时很温暖的南极洲来到澳大利亚落户。研究人员表示，如果对袋鼠进行仔细研究，可能为发现1.5亿年前的“人类祖先”到底是个什么样子找到些许有价值的线索。
英国《自然》杂志曾报道说，人和老鼠的基因图谱竟然“基本相同”。比如，人类和老鼠都有大约30000条基因，其中约有80%的基因是“完全一样的”。这项研究最终发现，人和老鼠约共享有99%的类似基因，其中最有意思的是，人类同样具有能“长出尾巴的基因” 。
科学家们指出，正是由于在人基因和老鼠基因之间存在的细小差别(仅仅300条特色基因)，才导致了两个完全不同的哺乳动物的产生。此外，老鼠具有20对染色体，而人类则有23对。今后人们可以通过老鼠来了解各种人体疾病的“致病”基因，并探索根治手段。
尽管老鼠基因比人类的要小14%左右，但是40%的人鼠基因可以“直接组合”。与人类相比，老鼠基因最独特的部分就是具有形成其灵敏嗅觉和强大生殖系统的能力。由于老鼠细胞和器官与人“大同小异”，加上这种动物繁殖力惊人，因此能充当“取之不尽”的人体实验代用品。
上述两项研究得出有趣结果，再度证明了时间与基因变化和重组所带来的神奇力量。
责任编辑: wallsatan
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环球科学(《科学美国人》中文版)－世界科普杂志第一品牌－1845年创刊、139位诺贝尔奖得主撰稿、从爱迪生到比尔·盖茨都喜欢阅读 / 地球故事 / 动植物 / 澳科学家：人类和袋鼠在1.5亿年前是“一家”
澳科学家：人类和袋鼠在1.5亿年前是“一家”
2008-11-20 科学网
可爱的澳大利亚袋鼠
澳大利亚研究人员11月18日宣称，澳洲大陆特产的袋鼠的基因图谱与人类相似，并且很可能起源于中国。据悉，这是人类历史上首次成功绘制出袋鼠的基因图谱。有关方面随即发现，不少袋鼠基因除了与人类相同外，就连其排序也一模一样。
最初，研究人员最初怀疑，袋鼠和人类的基因应该“差别巨大”，然而最终的研究成果推翻了这一假设，双方的基因图谱差别不大。有科学家就此推测，袋鼠和人类的共同祖先生活在至少1.5亿年前。此前有研究宣称，人类和老鼠在7000万年前拥有同一个祖先。
上述研究项目还推测，澳洲袋鼠的老家很可能在中国。后来，这种动物首先从中国前往美洲，并经当时很温暖的南极洲来到澳大利亚落户。研究人员表示，如果对袋鼠进行仔细研究，可能为发现1.5亿年前的“人类祖先”到底是个什么样子找到些许有价值的线索。
英国《自然》杂志曾报道说，人和老鼠的基因图谱竟然“基本相同”。比如，人类和老鼠都有大约30000条基因，其中约有80%的基因是“完全一样的”。这项研究最终发现，人和老鼠约共享有99%的类似基因，其中最有意思的是，人类同样具有能“长出尾巴的基因” 。
科学家们指出，正是由于在人基因和老鼠基因之间存在的细小差别(仅仅300条特色基因)，才导致了两个完全不同的哺乳动物的产生。此外，老鼠具有20对染色体，而人类则有23对。今后人们可以通过老鼠来了解各种人体疾病的“致病”基因，并探索根治手段。
尽管老鼠基因比人类的要小14%左右，但是40%的人鼠基因可以“直接组合”。与人类相比，老鼠基因最独特的部分就是具有形成其灵敏嗅觉和强大生殖系统的能力。由于老鼠细胞和器官与人“大同小异”，加上这种动物繁殖力惊人，因此能充当“取之不尽”的人体实验代用品。
上述两项研究得出有趣结果，再度证明了时间与基因变化和重组所带来的神奇力量。
责任编辑: wallsatan
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• 人工饲养使动物拥有更鲜艳多变的毛色 - 01-20 08:30 am
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Wednesday, March 4, 2009
tree kangaroos
What is a Tree Kangaroo?
A tree kangaroo is one of the largest marsupials, and is closely related to both the wallaby and the larger kangaroo. Unlike its two close relatives, however, the tree kangaroo at some point adapted to becoming an arboreal, or tree living, species. There are over 10 species of tree kangaroo, some living in the rainforests of Australia, and others living in Papua New Guinea, and the islands surrounding New Guinea. The tree kangaroo prefers dense forest growth, as it is a solitary and shy creature.
Like its relatives, the tree kangaroo is an impressive jumper, though its feet are not as large. It can, however, jump from tree to tree with ease. Jumps down from one tree to another have been measured at an impressive 30 feet (9.14 m) in length. They can also spring up high into trees. They are adept climbers with very long tails that help them to expertly balance. Some tree kangaroos can be more easily found at night, as they occasionally exhibit nocturnal behavior.
The tree kangaroo species vary in size but most are approximately 50 inches (1.27 m) tall, and adult males weigh approximately 25 pounds (11.33 kg). Females may weigh about 5 pounds less than the males. They have an average life span in the wild of approximately 14 years. In captivity, the tree kangaroo can live to be about 20.
Like all marsupials, the tree kangaroo has a pouch. Tiny babies are born individually after about a month-long gestation period. It takes a little over a year before the babies will be ready to live outside the pouch. The female tree kangaroo tends to live with a single male, and will usually be caring for her current child in the pouch. Once that child has reached adulthood, the tree kangaroo and her mate will produce another child.
Tree kangaroos are herbivorous, and their diet consists of the leaves abundantly available in their dense forest habitats. They are also ruminants, which means they digest their food partially then re-chew it in the form of a cud. It is very unusual for an animal without hooves to have ruminant characteristics.
Many tree kangaroos are considered either threatened or endangered because of habitat destruction due to logging. Some hope exists for the tree kangaroo with vigorous conservation efforts. A 2005 expedition to an island of New Guinea discovered a cache of Golden Mantled Tree Kangaroos, which were thought previously to be extremely endangered. That a healthy population of this tree kangaroo could still exist is encouraging and inspiring to wildlife conservationists and animal lovers alike.
A tree kangaroo is one of the largest marsupials, and is closely related to both the wallaby and the larger kangaroo. Unlike its two close relatives, however, the tree kangaroo at some point adapted to becoming an arboreal, or tree living, species. There are over 10 species of tree kangaroo, some living in the rainforests of Australia, and others living in Papua New Guinea, and the islands surrounding New Guinea. The tree kangaroo prefers dense forest growth, as it is a solitary and shy creature.
Like its relatives, the tree kangaroo is an impressive jumper, though its feet are not as large. It can, however, jump from tree to tree with ease. Jumps down from one tree to another have been measured at an impressive 30 feet (9.14 m) in length. They can also spring up high into trees. They are adept climbers with very long tails that help them to expertly balance. Some tree kangaroos can be more easily found at night, as they occasionally exhibit nocturnal behavior.
The tree kangaroo species vary in size but most are approximately 50 inches (1.27 m) tall, and adult males weigh approximately 25 pounds (11.33 kg). Females may weigh about 5 pounds less than the males. They have an average life span in the wild of approximately 14 years. In captivity, the tree kangaroo can live to be about 20.
Like all marsupials, the tree kangaroo has a pouch. Tiny babies are born individually after about a month-long gestation period. It takes a little over a year before the babies will be ready to live outside the pouch. The female tree kangaroo tends to live with a single male, and will usually be caring for her current child in the pouch. Once that child has reached adulthood, the tree kangaroo and her mate will produce another child.
Tree kangaroos are herbivorous, and their diet consists of the leaves abundantly available in their dense forest habitats. They are also ruminants, which means they digest their food partially then re-chew it in the form of a cud. It is very unusual for an animal without hooves to have ruminant characteristics.
Many tree kangaroos are considered either threatened or endangered because of habitat destruction due to logging. Some hope exists for the tree kangaroo with vigorous conservation efforts. A 2005 expedition to an island of New Guinea discovered a cache of Golden Mantled Tree Kangaroos, which were thought previously to be extremely endangered. That a healthy population of this tree kangaroo could still exist is encouraging and inspiring to wildlife conservationists and animal lovers alike.
What is a Tree Kangaroo?
What is a Tree Kangaroo?
A tree kangaroo is one of the largest marsupials, and is closely related to both the wallaby and the larger kangaroo. Unlike its two close relatives, however, the tree kangaroo at some point adapted to becoming an arboreal, or tree living, species. There are over 10 species of tree kangaroo, some living in the rainforests of Australia, and others living in Papua New Guinea, and the islands surrounding New Guinea. The tree kangaroo prefers dense forest growth, as it is a solitary and shy creature.
Like its relatives, the tree kangaroo is an impressive jumper, though its feet are not as large. It can, however, jump from tree to tree with ease. Jumps down from one tree to another have been measured at an impressive 30 feet (9.14 m) in length. They can also spring up high into trees. They are adept climbers with very long tails that help them to expertly balance. Some tree kangaroos can be more easily found at night, as they occasionally exhibit nocturnal behavior.
The tree kangaroo species vary in size but most are approximately 50 inches (1.27 m) tall, and adult males weigh approximately 25 pounds (11.33 kg). Females may weigh about 5 pounds less than the males. They have an average life span in the wild of approximately 14 years. In captivity, the tree kangaroo can live to be about 20.
Like all marsupials, the tree kangaroo has a pouch. Tiny babies are born individually after about a month-long gestation period. It takes a little over a year before the babies will be ready to live outside the pouch. The female tree kangaroo tends to live with a single male, and will usually be caring for her current child in the pouch. Once that child has reached adulthood, the tree kangaroo and her mate will produce another child.
Tree kangaroos are herbivorous, and their diet consists of the leaves abundantly available in their dense forest habitats. They are also ruminants, which means they digest their food partially then re-chew it in the form of a cud. It is very unusual for an animal without hooves to have ruminant characteristics.
Many tree kangaroos are considered either threatened or endangered because of habitat destruction due to logging. Some hope exists for the tree kangaroo with vigorous conservation efforts. A 2005 expedition to an island of New Guinea discovered a cache of Golden Mantled Tree Kangaroos, which were thought previously to be extremely endangered. That a healthy population of this tree kangaroo could still exist is encouraging and inspiring to wildlife conservationists and animal lovers alike.
Related wiseGEEK articles
What are Some Arboreal Animals?
What is a Marsupial Mole?
What is a Ruminant?
What is a Civet?
What is a Palm Civet?
What is Reintroduction?
What Should I Know About Papua New Guinea?
Category
Animals and the Environment
New: Post your questions or comments about this article!
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A tree kangaroo is one of the largest marsupials, and is closely related to both the wallaby and the larger kangaroo. Unlike its two close relatives, however, the tree kangaroo at some point adapted to becoming an arboreal, or tree living, species. There are over 10 species of tree kangaroo, some living in the rainforests of Australia, and others living in Papua New Guinea, and the islands surrounding New Guinea. The tree kangaroo prefers dense forest growth, as it is a solitary and shy creature.
Like its relatives, the tree kangaroo is an impressive jumper, though its feet are not as large. It can, however, jump from tree to tree with ease. Jumps down from one tree to another have been measured at an impressive 30 feet (9.14 m) in length. They can also spring up high into trees. They are adept climbers with very long tails that help them to expertly balance. Some tree kangaroos can be more easily found at night, as they occasionally exhibit nocturnal behavior.
The tree kangaroo species vary in size but most are approximately 50 inches (1.27 m) tall, and adult males weigh approximately 25 pounds (11.33 kg). Females may weigh about 5 pounds less than the males. They have an average life span in the wild of approximately 14 years. In captivity, the tree kangaroo can live to be about 20.
Like all marsupials, the tree kangaroo has a pouch. Tiny babies are born individually after about a month-long gestation period. It takes a little over a year before the babies will be ready to live outside the pouch. The female tree kangaroo tends to live with a single male, and will usually be caring for her current child in the pouch. Once that child has reached adulthood, the tree kangaroo and her mate will produce another child.
Tree kangaroos are herbivorous, and their diet consists of the leaves abundantly available in their dense forest habitats. They are also ruminants, which means they digest their food partially then re-chew it in the form of a cud. It is very unusual for an animal without hooves to have ruminant characteristics.
Many tree kangaroos are considered either threatened or endangered because of habitat destruction due to logging. Some hope exists for the tree kangaroo with vigorous conservation efforts. A 2005 expedition to an island of New Guinea discovered a cache of Golden Mantled Tree Kangaroos, which were thought previously to be extremely endangered. That a healthy population of this tree kangaroo could still exist is encouraging and inspiring to wildlife conservationists and animal lovers alike.
Related wiseGEEK articles
What are Some Arboreal Animals?
What is a Marsupial Mole?
What is a Ruminant?
What is a Civet?
What is a Palm Civet?
What is Reintroduction?
What Should I Know About Papua New Guinea?
Category
Animals and the Environment
New: Post your questions or comments about this article!
X
Close this window
FREE: Subscribe to wiseGEEK
help learn more
our strict privacy policy ensures that your email address will be safe
large jumping kangaroos
Kangaroos
The kangaroo is one of Australia’s most iconic animals, and most species are endemic to Australia. There are over 60 different species of kangaroo and their close relatives, with all kangaroos belonging to the super family Macropodoidea (or macropods, meaning ‘great-footed’). The super family is divided into the Macropodidae and the Potoroidae families.
The Macropodidae (macropod) family includes kangaroos, wallabies, wallaroos, pademelons, tree-kangaroos and forest wallabies. Species in the macropod family vary greatly in size and weight, ranging from 0.5 kilograms to 90 kilograms. The Potoroinae (potoroid) family of kangaroos includes the potoroo, bettong and rat-kangaroo, which live only in Australia.
Kangaroos of different types live in all areas of Australia, from cold-climate areas and desert plains, to tropical rainforests and beaches.
Life and habitat
Kangaroos are herbivorous, eating a range of plants and, in some cases, fungi. Most are nocturnal but some are active in the early morning and late afternoon. Different kangaroo species live in a variety of habitats. Potoroids, for example, make nests while tree-kangaroos live above ground in trees. Larger species of kangaroo tend to shelter under trees or in caves and rock clefts.
Kangaroos of all sizes have one thing in common: powerful back legs with long feet. Most kangaroos live on the ground and are distinguished from other animals by the way they hop on their strong back legs. A kangaroo’s tail is used to balance while hopping and as a fifth limb when moving slowly.
All female kangaroos have front-opening pouches that contain four teats. This is where the ‘joey’, or young kangaroo, is raised until it can survive outside the pouch.
Most kangaroos have no set breeding cycle and are able to breed all year round. Because they are such prolific breeders, a kangaroo population can increase fourfold in five years if it has continuous access to plentiful food and water.
Kangaroo management and use
Kangaroos have long been important to the survival of Australia’s Indigenous peoples, who have hunted kangaroos for tens of thousands of years for both the meat and the skins. When Europeans arrived in Australia in the late eighteenth century, they too hunted kangaroos for survival.
Kangaroos continue to be used as a resource, but only under strict government controls. All Australian states and territories have legislation to protect kangaroos. Only the four most abundant species of kangaroo and small numbers of two common wallaby species can be commercially harvested for export, and then only by licensed hunters in accordance with an approved management plan. These species are the Red kangaroo, Eastern grey kangaroo, Western grey kangaroo, Common Wallaroo (Euro), Bennetts wallaby and Pademelon (a type of wallaby).
Kangaroo harvesting and the environment
The Australian rangeland environment is fragile and easily degraded. Kangaroos have evolved as part of the Australian ecosystem and, with their soft feet, cause no environmental degradation at natural population levels. However, kangaroo populations have increased dramatically since European settlement in these areas due to the introduction of European farming methods and, for this reason, carefully controlled harvesting is required.
Kangaroo harvesting is carried out under the strict environmental controls provided by the Australian Government’s Environment Protection and Biodiversity Conservation Act 1999. The commercial harvesting of widespread and abundant kangaroo species contributes to the sustainability of the Australian environment.
The four species of kangaroo that are commercially harvested have very large populations. None is threatened or endangered. The Red kangaroo, Eastern grey kangaroo and Western grey kangaroo are the most abundant species and make up over 90 per cent of the commercial harvest. Their combined population size has fluctuated between 15 and 50 million animals over the past 25 years in the harvested areas, depending on seasonal conditions.
The harvesting of kangaroos is permitted on a quota basis that is reviewed annually and independent of market demand. Quotas are set on the basis of population size and trends, and long-term climate predictions. Conservation of the species remains the foremost consideration. This approach ensures that the harvesting of kangaroos is managed in an ecologically sustainable way.
There is no farming of kangaroos in Australia. Kangaroos are harvested in the wild by licensed hunters.
The kangaroo industry
Australia’s kangaroo industry began exporting kangaroo meat to Europe in 1959 in response to interest from the European game meat industry. Today kangaroo meat and skins are exported all over the world.
The live export of kangaroos is prohibited under the Environment Protection and Biodiversity Conservation Act. There are a few exceptions where the purpose is noncommercial, such as inter-zoo exchanges.
Where kangaroos are taken for commercial use, they must be killed by a licensed, fully trained hunter. An Australian Senate Select Committee on animal welfare, after an extensive investigation, concluded that: ‘There is no doubt that the shooting of kangaroos by professional shooters is the most humane way of killing kangaroos’.
Animal welfare considerations are a priority of the Environment Protection and Biodiversity Conservation Act. Kangaroo harvesting and processing is subject to strict regulations and all hunters face penalties if they do not abide by the National Code of Practice for the Humane Killing of Kangaroos. Compliance with the Code is a licence condition for commercial shooters in all states.
Kangaroo products processed for export, including meat, must undergo inspection by Australian Quarantine and Inspection Service (AQIS) officials. A breach of government regulations relating to the export of kangaroo meat may lead to fines of up to $250 000 or imprisonment of up to ten years or both.
Kangaroo meat
The Australian kangaroo industry estimates that it exports kangaroo meat to more than 55 countries. Kangaroo meat is increasingly popular and export markets are expected to increase since kangaroo is considered one of the finest game meats. Its growing appeal stems from its well-flavoured, slightly gamey taste. Kangaroo meat contains very little saturated fat relative to other meats and is high in protein, zinc and iron.
The European Union and Russia are the most significant markets with the USA and Asia becoming increasingly important. All kangaroo meat processed for export undergoes strict inspection by the Australian Quarantine and Inspection Service to ensure that it is fit for human consumption.
In addition, all kangaroo meat processing plants must have a certificate of registration and are examined and certified in accordance with the strict requirements of importing countries.
Kangaroo furs, skins and leather
Kangaroo skins and furs are exported to a large number of markets in Europe, the USA and Asia.
Kangaroo skins are exported in different stages of treatment: salted, pickled (semi-processed) and tanned. Like all kangaroo exports, these products are strictly sourced from only the six most abundant species outlined above.
Some kangaroo skins are traded as furs, while others are sold for the leather.
Although pickled skins generate the most export earnings of all kangaroo skins and furs, there is a growing export trade in finished kangaroo leather. Kangaroo skin is renowned for being very strong, yet light in weight. It is ideal for use in the manufacture of high-quality leather goods, including footwear. Because of kangaroo leather’s high tensile strength, it is also suitable for the manufacture of sporting footwear.
While only a limited number of kangaroos of certain species may be harvested, a full range of high-quality kangaroo products is available for international markets.
The kangaroo is one of Australia’s most iconic animals, and most species are endemic to Australia. There are over 60 different species of kangaroo and their close relatives, with all kangaroos belonging to the super family Macropodoidea (or macropods, meaning ‘great-footed’). The super family is divided into the Macropodidae and the Potoroidae families.
The Macropodidae (macropod) family includes kangaroos, wallabies, wallaroos, pademelons, tree-kangaroos and forest wallabies. Species in the macropod family vary greatly in size and weight, ranging from 0.5 kilograms to 90 kilograms. The Potoroinae (potoroid) family of kangaroos includes the potoroo, bettong and rat-kangaroo, which live only in Australia.
Kangaroos of different types live in all areas of Australia, from cold-climate areas and desert plains, to tropical rainforests and beaches.
Life and habitat
Kangaroos are herbivorous, eating a range of plants and, in some cases, fungi. Most are nocturnal but some are active in the early morning and late afternoon. Different kangaroo species live in a variety of habitats. Potoroids, for example, make nests while tree-kangaroos live above ground in trees. Larger species of kangaroo tend to shelter under trees or in caves and rock clefts.
Kangaroos of all sizes have one thing in common: powerful back legs with long feet. Most kangaroos live on the ground and are distinguished from other animals by the way they hop on their strong back legs. A kangaroo’s tail is used to balance while hopping and as a fifth limb when moving slowly.
All female kangaroos have front-opening pouches that contain four teats. This is where the ‘joey’, or young kangaroo, is raised until it can survive outside the pouch.
Most kangaroos have no set breeding cycle and are able to breed all year round. Because they are such prolific breeders, a kangaroo population can increase fourfold in five years if it has continuous access to plentiful food and water.
Kangaroo management and use
Kangaroos have long been important to the survival of Australia’s Indigenous peoples, who have hunted kangaroos for tens of thousands of years for both the meat and the skins. When Europeans arrived in Australia in the late eighteenth century, they too hunted kangaroos for survival.
Kangaroos continue to be used as a resource, but only under strict government controls. All Australian states and territories have legislation to protect kangaroos. Only the four most abundant species of kangaroo and small numbers of two common wallaby species can be commercially harvested for export, and then only by licensed hunters in accordance with an approved management plan. These species are the Red kangaroo, Eastern grey kangaroo, Western grey kangaroo, Common Wallaroo (Euro), Bennetts wallaby and Pademelon (a type of wallaby).
Kangaroo harvesting and the environment
The Australian rangeland environment is fragile and easily degraded. Kangaroos have evolved as part of the Australian ecosystem and, with their soft feet, cause no environmental degradation at natural population levels. However, kangaroo populations have increased dramatically since European settlement in these areas due to the introduction of European farming methods and, for this reason, carefully controlled harvesting is required.
Kangaroo harvesting is carried out under the strict environmental controls provided by the Australian Government’s Environment Protection and Biodiversity Conservation Act 1999. The commercial harvesting of widespread and abundant kangaroo species contributes to the sustainability of the Australian environment.
The four species of kangaroo that are commercially harvested have very large populations. None is threatened or endangered. The Red kangaroo, Eastern grey kangaroo and Western grey kangaroo are the most abundant species and make up over 90 per cent of the commercial harvest. Their combined population size has fluctuated between 15 and 50 million animals over the past 25 years in the harvested areas, depending on seasonal conditions.
The harvesting of kangaroos is permitted on a quota basis that is reviewed annually and independent of market demand. Quotas are set on the basis of population size and trends, and long-term climate predictions. Conservation of the species remains the foremost consideration. This approach ensures that the harvesting of kangaroos is managed in an ecologically sustainable way.
There is no farming of kangaroos in Australia. Kangaroos are harvested in the wild by licensed hunters.
The kangaroo industry
Australia’s kangaroo industry began exporting kangaroo meat to Europe in 1959 in response to interest from the European game meat industry. Today kangaroo meat and skins are exported all over the world.
The live export of kangaroos is prohibited under the Environment Protection and Biodiversity Conservation Act. There are a few exceptions where the purpose is noncommercial, such as inter-zoo exchanges.
Where kangaroos are taken for commercial use, they must be killed by a licensed, fully trained hunter. An Australian Senate Select Committee on animal welfare, after an extensive investigation, concluded that: ‘There is no doubt that the shooting of kangaroos by professional shooters is the most humane way of killing kangaroos’.
Animal welfare considerations are a priority of the Environment Protection and Biodiversity Conservation Act. Kangaroo harvesting and processing is subject to strict regulations and all hunters face penalties if they do not abide by the National Code of Practice for the Humane Killing of Kangaroos. Compliance with the Code is a licence condition for commercial shooters in all states.
Kangaroo products processed for export, including meat, must undergo inspection by Australian Quarantine and Inspection Service (AQIS) officials. A breach of government regulations relating to the export of kangaroo meat may lead to fines of up to $250 000 or imprisonment of up to ten years or both.
Kangaroo meat
The Australian kangaroo industry estimates that it exports kangaroo meat to more than 55 countries. Kangaroo meat is increasingly popular and export markets are expected to increase since kangaroo is considered one of the finest game meats. Its growing appeal stems from its well-flavoured, slightly gamey taste. Kangaroo meat contains very little saturated fat relative to other meats and is high in protein, zinc and iron.
The European Union and Russia are the most significant markets with the USA and Asia becoming increasingly important. All kangaroo meat processed for export undergoes strict inspection by the Australian Quarantine and Inspection Service to ensure that it is fit for human consumption.
In addition, all kangaroo meat processing plants must have a certificate of registration and are examined and certified in accordance with the strict requirements of importing countries.
Kangaroo furs, skins and leather
Kangaroo skins and furs are exported to a large number of markets in Europe, the USA and Asia.
Kangaroo skins are exported in different stages of treatment: salted, pickled (semi-processed) and tanned. Like all kangaroo exports, these products are strictly sourced from only the six most abundant species outlined above.
Some kangaroo skins are traded as furs, while others are sold for the leather.
Although pickled skins generate the most export earnings of all kangaroo skins and furs, there is a growing export trade in finished kangaroo leather. Kangaroo skin is renowned for being very strong, yet light in weight. It is ideal for use in the manufacture of high-quality leather goods, including footwear. Because of kangaroo leather’s high tensile strength, it is also suitable for the manufacture of sporting footwear.
While only a limited number of kangaroos of certain species may be harvested, a full range of high-quality kangaroo products is available for international markets.
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