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- Journal of East African Natural History
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- Volume 1968, Issue 116, 1968
Journal of East African Natural History - Volume 1968, Issue 116, 1968
Volume 1968, Issue 116, 1968
Author Edwyn IsaacSource: Journal of East African Natural History 1968, pp 1 –6 (1968)More Less
Cyanophyta Lyngbya majuscula (Dillw.) Harv. Kuetz. In her letter Dr. Koster comments: "" ... a variable species with 16-60? thick trichomes, which are blue-green, brownish-green or greyish-violet. It is a common tropical species"". This is certainly a common species along the whole length of the. Kenya coast. In places it is prominent both on account of the length of the filaments which may be 14 cms. or more and because of the abundance of such clumps as off shore at Majunguni, Pate Island where it occurred as an epiphyte on stumps and leaves of Cymodocea ciliata.
Author F.M.** Isaac, E.* & IsaacSource: Journal of East African Natural History 1968, pp 7 –28 (1968)More Less
From north to south, Kenya extends over about 10? latitude while the coastline has a latitudinal extent of about a third of this-from about latitude 1? 40""S. to about 4?41""S. Further, as compared with the coasts of Norway or the west of Scotland the coastline of Kenya is relatively little indented. Where the coastline is broken or where there are deep inlets, these are in the nature of creeks flanked by mangrove which are characteristic especially of the extreme north and south of this region. The total coastal area of Kenya is relatively small. While the land surface of Kenya extends well north of the equator, the coastline lies entirely to the south of it. (Fig. 1). The algal flora of the Kenya coast is a rich one and much work will be involved in collecting and identifying all the species that occur on these coasts. A number of new species can also be expected two new Turbinarias have already been descriptionbed (Taylor, 1966). The species named in this paper and included in the two lists so far published (Isaac, 1967, 1968) by no means exhaust the roll call of species. The number of small epiphytic species is likely to be appreciable.
Author F.M. IsaacSource: Journal of East African Natural History 1968, pp 29 –47 (1968)More Less
Marine flowering plants are a prominent feature of the intertidal zone of the Kenya coast. They extend from the low water level of neap tides (i.e. they are rarely exposed except at spring tides) to situations well beyond the reef in deep water. Some are exposed for considerable periods during spring tides while others, although situated high on the shore, grow in pools and depressions where a certain amount of water is left by the receding tide.
Author G.** Brown, L.H.* & BursellSource: Journal of East African Natural History 1968, pp 49 –51 (1968)More Less
The Cuckoo Falcon, Aviceda cuculoides Swainson, is an uncommon, elusive, and little-known bird of prey which has never been thoroughly studied at the nest. Scanty West African observations indicate that it performs a vigorous tumbling and diving display, accompanied by calling and the exhibition of the chestnut underwing coverts; that the nest is probably built afresh annually; and that the incubation period was in one case about 33 days though, as the nest in question failed, this was not certain (J. H. Elgood, pers. comm., Brown & Amadon; in Press).
Author J. AsheSource: Journal of East African Natural History 1968, pp 53 –59 (1968)More Less
A new viper of the genus Atheris has recently been discovered near Mount Kenya. This form comes from East of the Rift Valley in Kenya where no representatives of this genus have been previously recorded, and differs sufficiently from other forms to merit recognition as a separate species.
Author G.C. BackhurstSource: Journal of East African Natural History 1968, pp 61 –65 (1968)More Less
Earlier reports in this Journal have covered the period from 1960, when ringing started, to 30th June, 1966 (Blencowe, 1960 and 1962; Smart, 1966). The present report covers the year 1st July, 1966, to 30th June, 1967, except that certain local birds which were ringed in July 1966 (and were included by Smart, loc. cit.) are not counted in this year's totals. It will be seen from the tables which follow that the present year was outstandingly good for ringing. John Smart, who left Kenya in April 1966, was responsible for much of the enthusiasm which made these results possible. His services will be greatly missed. The year was also marked by the first recovery of an East African-ringed bird found outside East Africa. The nomenclature used follows Vaurie for the Palaearctic birds and Mackworth-Praed & Grant for the African species.
Author M.P. KahlSource: Journal of East African Natural History 1968, pp 63 –72 (1968)More Less
Between November 1963 and July 1967 I have been engaged in research on the comparative behaviour and ecology of storks (family Ciconiidae) in Kenya, Uganda, Tanzania, and Ethiopia. A number of previously unreported breeding localities were discovered during this study-some being found by me personally and others being reported to me by various correspondents. This paper is an attempt to compile the recent records, in the hope of giving a better understanding of the breeding distribution and breeding seasons of this family of birds. Storks frequently use the same nesting site for many years, if undisturbed and given the proper climatic conditions, and so perhaps these records will prove useful to future workers studying these birds. I have also included a few comments on the ecological factors involved in the timing of the breeding seasons, as a possible basis for further research along these lines.