Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia
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| 1. Verfasser: | |
|---|---|
| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Berlin u.a.
Springer
1981
|
| Schriftenreihe: | Ecological studies.
40. |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
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| 245 | 1 | 0 | |a Ibexes in an African environment |b ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia |c B. Nievergelt |
| 264 | 1 | |a Berlin u.a. |b Springer |c 1981 | |
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Datensatz im Suchindex
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| DE-BY-TUM_call_number | 1001 10.1987 A 489 |
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| DE-BY-TUM_location | Mag |
| DE-BY-TUM_media_number | 040002270757 |
| DE-BY-UBM_katkey | 307364 |
| DE-BY-UBM_media_number | 41620408620011 |
| _version_ | 1823049862312099840 |
| adam_text | Titel: Ibexes in an African environment
Autor: Nievergelt, Bernhard
Jahr: 1981
Contents
1 Introduction.......................... 1
A Reader s Guide........................ 3
The Simen, a Unique Afroalpine Community
2 The Simen Mountains: Geography and Climate of the Study Area. . . 7
3 The Vegetation in the Simen Mountains and Human Utilization
of the Area..........................15
4 The Walia Ibex.........................28
4.1 The Walia Ibex: Its Taxonomy and Morphological Characteristics;
Age Classes and Horn Growth................28
4.2 When in the History of the Climate Could the Ibex, as a Palaearctic
Animal, Have Invaded the Range of the Simen Mountains? ... 33
4.3 The Reproductive Cycle of the Walia Ibex and the General Grouping
Pattern..........................35
5 Two Possible Competitors of the Walia Ibex: the Klipspringer and the
Gelada Baboon.........................39
6 Further Mammals and Birds Living in the Simen Mountains.....44
Methods, Techniques and Population Estimates
7 Methods of Obtaining Data and Field Techniques.......... 53
7.1 Observation and Recording of Animals............ 53
7.2 Optimal Time of Day for Spotting Animals and Duration of the
Observations....................... 61
7.3 The Grid Pattern System Within the Main Study Area..... 62
7.4 How Comparable and Representative Are Observations Carried Out
from the Selected Fixed Observation Points?.......... 63
7.5 Techniques Applied to Investigate Feeding Behaviour of Walia Ibex,
Klipspringer and Gelada Baboon............... 65
VIII Contents
8 Methods for the Analysis of Data on Habitat Selection of the Included
Species............................ 67
8.1 The Variables Used in the Analysis of Data.......... 67
8.2 The Procedure in Applying the Stepwise Multiple Regression ... 69
8.3 Assumptions for Regression Analysis............. 70
8.4 Transformation of the Main Dependent Variable........ 70
8.5 Relations Between the Environmental Factors......... 71
8.6 Transformation of the Independent Variables......... 72
8.7 Inherent Imperfections in the Data Being Able to Diminish the
Multiple Correlation Coefficient and a Test to Detect Possible but
Overlooked Influential Environmental Factors......... 74
9 Estimates of Population Size and Changes of the Walia Ibex..... 77
The Niche and Habitat of the Walia Ibex, the Klipspringer
and the Gelada Baboon
10 The Habitat Selection of the Walia Ibex, the Klipspringer and the
Gelada Baboon According to the Frequencies of Their Visits to the
Hectare Fields.........................85
11 The Habitat Selection of the Walia Ibex, the Klipspringer and the
Gelada Baboon with Regard to Particular Environmental Factors ... 92
11.1 The Gradient of the Slope.................. 92
11.2 The Compass Direction of the Slope with Daily and Seasonal Effect 94
11.3 The Altitude and the Vegetation Over the Seasons....... 97
11.4 The Relief, the Weather and the Activity........... 99
11.5 Relationship Between the Gradient, the Vegetation and the Group
Size in the Walia Ibex, the Klipspringer and the Gelada Baboon . 102
11.6 Observation Success at Muchila Afaf-, Kedadit- and
Saha-Observation Points.................. 106
11.7 Conclusions, Comparisons with the Alpine Ibex and Considerations
on a Possible Tradition...................108
12 Separation in the Habitat of the Walia Ibex, the Klipspringer, the
Gelada Baboon, the Bushbuck, the Colobus Monkey, the Simen Fox
and the Golden Jackal......................Ill
13 The Plot of the Residuals of the Regression Equation - a Test for
Detecting Overlooked, but Decisive Independent Variables......121
14 The Theoretical Distribution Pattern of the Walia Ibex and the
Klipspringer Within the Study Area................124
Summary to Chapters 10 to 14...................132
Contents IX
The Social System of the Walia Ibex
15 Towards the Social System of the Walia Ibex: Approach, Inferences and
Predictions...........................137
15.1 The Approach....................... 137
15.2 Inferred Behaviour of Distinct Ibex Classes.......... 138
15.3 Predictions Deduced from the Inferred Behaviour of the Sex-Age
Classes.......................... 143
16 The Social System of the Walia Ibex; Evidence for and Tests of the
Above Predictions.......................146
16.1 Habitat Preference of Males and Females of the Walia Ibex;
Tests of the Predictions. 1 to 3................146
16.2 Size of Home Ranges; Test of Prediction 4...........150
16.3 The Dominant Males Only as Occasional Visitors in
Female-Young Groups; Test of Prediction 5..........152
16.4 The Rank Order and the Fights Between Walias of Different Classes;
Test of Prediction 6.....................152
16.5 The Marching Order Within the Mixed Groups; Test of Prediction 7 154
16.6 Food Selection of the Walia Ibex of Different Classes and of the
Klipspringer with Considerations on Prediction 9........157
16.7 Conclusions and Comparisons with the Situation in the Alpine Ibex 167
Summary to Chapters 15 and 16...................169
Conservational Outlook
17 The Simen, an Ecosystem in Danger................ 173
References............................ 179
Subject Index........................... 187
|
| any_adam_object | 1 |
| author | Nievergelt, Bernhard 1935-2021 |
| author_GND | (DE-588)1114520241 |
| author_facet | Nievergelt, Bernhard 1935-2021 |
| author_role | aut |
| author_sort | Nievergelt, Bernhard 1935-2021 |
| author_variant | b n bn |
| building | Verbundindex |
| bvnumber | BV000997025 |
| callnumber-first | Q - Science |
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| dewey-full | 599.73/58 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 599 - Mammalia |
| dewey-raw | 599.73/58 |
| dewey-search | 599.73/58 |
| dewey-sort | 3599.73 258 |
| dewey-tens | 590 - Animals |
| discipline | Biologie Geographie |
| format | Book |
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| geographic | Afrika (DE-588)4000695-5 gnd Sämen (DE-588)4076951-3 gnd |
| geographic_facet | Afrika Sämen |
| id | DE-604.BV000997025 |
| illustrated | Illustrated |
| indexdate | 2025-02-03T16:12:11Z |
| institution | BVB |
| isbn | 3540105921 0387105921 |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-000603516 |
| oclc_num | 7462341 |
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| owner_facet | DE-12 DE-19 DE-BY-UBM DE-M49 DE-BY-TUM DE-703 DE-824 DE-83 DE-188 |
| physical | IX, 189 S. Ill., graph. Darst., Kt. |
| psigel | TUB-nveb |
| publishDate | 1981 |
| publishDateSearch | 1981 |
| publishDateSort | 1981 |
| publisher | Springer |
| record_format | marc |
| series | Ecological studies. |
| series2 | Ecological studies. |
| spellingShingle | Nievergelt, Bernhard 1935-2021 Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia Ecological studies. Bovins - Ethiopie - Simen, Montagnes Mammifères - Éthiopie - Simen, Montagnes Ibex Ethiopia Simen Mountains Steinbock (DE-588)4183021-0 gnd Ökologie (DE-588)4043207-5 gnd Abessinischer Steinbock (DE-588)4141025-7 gnd Sozialverhalten (DE-588)4055903-8 gnd |
| subject_GND | (DE-588)4183021-0 (DE-588)4043207-5 (DE-588)4141025-7 (DE-588)4055903-8 (DE-588)4000695-5 (DE-588)4076951-3 |
| title | Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia |
| title_auth | Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia |
| title_exact_search | Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia |
| title_full | Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia B. Nievergelt |
| title_fullStr | Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia B. Nievergelt |
| title_full_unstemmed | Ibexes in an African environment ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia B. Nievergelt |
| title_short | Ibexes in an African environment |
| title_sort | ibexes in an african environment ecology and social system of the walia ibex in the simen mountains ethiopia |
| title_sub | ecology and social system of the Walia Ibex in the Simen Mountains, Ethiopia |
| topic | Bovins - Ethiopie - Simen, Montagnes Mammifères - Éthiopie - Simen, Montagnes Ibex Ethiopia Simen Mountains Steinbock (DE-588)4183021-0 gnd Ökologie (DE-588)4043207-5 gnd Abessinischer Steinbock (DE-588)4141025-7 gnd Sozialverhalten (DE-588)4055903-8 gnd |
| topic_facet | Bovins - Ethiopie - Simen, Montagnes Mammifères - Éthiopie - Simen, Montagnes Ibex Ethiopia Simen Mountains Steinbock Ökologie Abessinischer Steinbock Sozialverhalten Afrika Sämen |
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| volume_link | (DE-604)BV000004586 |
| work_keys_str_mv | AT nievergeltbernhard ibexesinanafricanenvironmentecologyandsocialsystemofthewaliaibexinthesimenmountainsethiopia |