Results 71 to 80 of about 2,914 (191)
Frontiers in Conservation ScienceFor more than 50 years, the United States (US) Endangered Species Act (ESA) has contributed to the protection, survival, and recovery of numerous species including gray wolves (Canis lupus), grizzly bears (Ursus arctos horribilis), whooping cranes (Grus ...
Heather A. L. Knight +4 more
doaj +1 more source
Montado’s ecosystem functions and services: the case study of Alentejo Central – Portugal [PDF]
, 2017 Although the concept of ecosystem services is well defined and centred on human use of natural systems, it is not yet consensual. The ecosystem services connect ecology and economy; they allow to integrate ecology into policies and to bring a monetary ...
Batista, Teresa +2 more
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野生动物学报, 1990 四月初,在得克萨斯州南部的盐泽地及淡水湖里,到处是天鹅的叫声。忽地,两只成年的美洲鹤带着他们的两只小鹤展翅飞起,悠闲地盘旋着,升入天空,很快就看不见了。他们开始了一年一次长达2500英里的冒险旅行。这次旅行将把它们带到加拿大北部的巢区,秋天他们将再回到得克萨斯州的越冬地来。美洲鹤（Grus americana）是北美洲特有的一种鹤,十分美丽,长而弯曲的脖子和长长的腿占了身高的大部分,长长的尖嘴、红黑色的头部、乌黑发亮的翼尖在雪白的体羽衬托下更加鲜明了。他们展开的双翅竟有7.5英尺宽 ...
张化危
doaj
Zero Augmentation: A method for fitting zero-modified count models that allows both zero-inflation and zero-deflation [PDF]
, 2010 The concept of zero-inflation is now well established, and several software packages exist that fit zero-inflated models. Whilst there is some mention of zero-deflation in the literature, there is very little published evidence of research into zero ...
Wilson, Paul
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2017 Texas Bays and Estuaries Meeting [PDF]
, 2017 Program for the 2017 Texas Bays and Estuaries Meeting held in Port Aransas, Texas, April 12-13, 2017.Coastal Bend Bays & Estuaries Program, Coastal Bend Bays Foundation, The University of Texas Marine Science Institute, Sea Grant Texas at Texas A&M ...
University of Texas Marine Science Institute
core +1 more source
Evolution and phylogeny of birds - Taxonomic consequences [PDF]
, 2012 Nucleotidsequenzen von mitochondrialen und nucleären Markergenen eignen sich hervorragend, um die Phylogenie und Evolution der Vögel zu untersuchen. Eine kürzlich publizierte Analyse mit 19 Kerngenen (Hackett et al.
Wink, Michael
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The Whooping Crane, Grus americana, Forster. [Pl. 313-314]
The birds of America : from drawings made in the United States and their territories(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire +2 more sources
Jaw musculature during the dawn of turtle evolution [PDF]
, 2018 Using a new approach to study muscle anatomy in vertebrates, the fully differentiated jaw musculature of 42 turtle species was studied and character mappings were performed. Soft tissue arrangements were correlated to the temporal openings (emarginations)
Werneburg, Ingmar
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Ecological characterization of the Florida springs coast: Pithlachascotee to Waccasassa Rivers [PDF]
, 1990 This report covers the upper coast of west-central Florida. This region includes the drainage basins and nearshore waters of the west coast of Florida between, but not including, the Anclote River basin and the Suwannee River basin.
Bland, Michael J. +4 more
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