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| 1. |
Effects of elephant browsing on Acacia seyal in Waza National Park, Cameroon |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 1-6
J. P. OKULA,
W. R. SISE,
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摘要:
SummaryFour areas of the Acacia seyal zone of the Waza National Park, Cameroon, were sampled by means of line transects to assess damage to trees caused by elephants. A total of 1742 trees was examined of which 72% were undamaged, 17% less than three‐quarters damaged and 11% were dead. Most of the damaged and dead trees were mature. Of the living trees, 42% were in the recruitment class, 34% were mature and 23% were in the regeneration class. It is concluded that elephant damage to Acacia trees is not serious enough to warrant management interference.RésuméLes effets du broutage par les éléphants de l'Acacia seyal dans le Parc National Waza, au Cameroun. Quatre parcelles de la zone à Acacia seyal du Parc National Waza, au Cameroun furent échantillonnées par ratissage afin d'évaluer les dégâts causés aux arbres par les éléphants. Un total de 1742 arbres furent examinés dont 73%étaient indemnes 16% endommagés à moins de trois‐quarts et 11%, morts. La plupart des arbres atteints et morts étaient adultes. Parmi les arbres vivants, 42% appartenaient à la classe de recrutement, 34%étaient adultes et 23% appartenaient à la classe de régénération. On aboutit à la conclusion que les dégâts causés aux Acacia par les éléphants ne sont pas suffisamment grave
ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00335.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 2. |
Hippopotamus habitat relationships on the Lundi River, Gonarezhou National Park, Zimbabwe |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 7-26
T. G. O'CONNOR,
B. M. CAMPBELL,
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摘要:
SummaryThe hippopotamus population on the Lundi river, Gonarezhou National Park, increased by 330% between 1958 and 1980. This study investigated whether hippopotamus were over‐utilizing their habitat during an optimal climatic period. Hippopotamus were utilizing an area of less than 1 km from the bank during the wet season and selecting for alluvial areas, including degraded sites on formerly cultivated fields. During the dry season they moved further inland. Impala selected for degraded sites during both wet and dry seasons. Hippopotamus and impala are responsible for maintaining the degraded nature of these formerly cultivated sites, but are not responsible for the initiation of degradation de novo.RésuméLa population d'hippopotames de la rivière Lundi (Parc National de Gonarezhou) a augmenté de 330% entre 1958 et 1980. La présente étude a examiné si l'hippopotame surexploitait son habitat au cours d'une période climatique optimale. L'hippopotame exploite une bande de moins d'un kilométre à partir de la rive durant la saison des pluies et sélectionne les zones alluviales y compris les sites dégradés sur d'anciens champs cultivés. Au cours de la saison sèche, il se déplace plus à l'intérieur des terres. Les impala choisissent des sites dégradés aussi bien en saison séche qu'en saison des pluies. L'hippopotame et l'impala sont responsables du maintien de la nature dégradée de ces sites anciennement cultivés, mais pas de l'initiation d
ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00336.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 3. |
Ichthyofauna of the Dinder National Park, Sudan |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 27-29
Z. N. Mahmoud,
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ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00337.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 4. |
Comparison of catches of two sizes of Sherman live traps in a grassland in Lake Nakuru National Park, Kenya |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 31-35
T. G. Schwan,
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ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00338.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 5. |
Quick population survey method using faecal droppings and a steady state assumption |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 37-39
T. R. McClanahan,
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ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00339.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 6. |
Effects of livestock enclosures (bomas) on the vegetation of the Athi Plains, Kenya |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 41-45
J. Brad Stelfox,
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ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00340.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 7. |
Diurnal and seasonal variation in biomass of arthropods in Tsavo East National Park, Kenya |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 47-51
P. C. Lack,
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ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00341.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 8. |
Population estimates and distribution patterns of elephants in the Tsavo ecosystem, Kenya, in 1980 |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 53-57
W. K. Ottichilo,
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ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00342.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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| 9. |
Book Reviews |
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African Journal of Ecology,
Volume 24,
Issue 1,
1986,
Page 59-60
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摘要:
Book reviewed in this article:Threatened Birds of Africa and Related Islands. The ICBPIIUCN Red Data Book, Part 1. 3rd edn. By N. J. Collar and S. N. Stuart.The Mammals of the Southern African Subregion. By R. H. N. Smithers.Threatened Birds of Africa and Related Islands. The ICBP/IUCN Red Data Book, Part 1 3rd edn. By N. J. Collar and S. N. Stuart
ISSN:0141-6707
DOI:10.1111/j.1365-2028.1986.tb00343.x
出版商:Blackwell Publishing Ltd
年代:1986
数据来源: WILEY
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Volume 24 issue 1