Zobrazeno 1 - 10
of 94
pro vyhledávání: '"H.J. Schoonbee"'
Autor:
J.I. De Wet, H.J. Schoonbee
Publikováno v:
Koedoe: African Protected Area Conservation and Science, Vol 34, Iss 2, Pp 69-75 (1991)
In South Africa, Ceratogyrus is presently protected by the Transvaal Provincial Nature Conservation Ordinance. Owing to the demand for these spiders as pets they are classified as Commercially Threatened in terms of the ILJCN system. It was found, ho
Externí odkaz:
https://doaj.org/article/c11721868d104fca974753ce2468e7c5
Publikováno v:
African Zoology; Vol 24, No 4 (1989); 282-289
The species composition, seasonal abundance and spatial distribution of the fish fauna of the Mtata estuary (8,5 km long) was determined by means of gill nets. Nine hundred and ninety fish (462,9 kg) comprising 26 species were caught of which M. ceph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::783129fdff7282dcfcf4072b23d2a586
https://www.ajol.info/index.php/az/article/view/153532
https://www.ajol.info/index.php/az/article/view/153532
Publikováno v:
African Zoology; Vol 20, No 4 (1985); 213-220
During the period of survey the 8 km long Kei estuary was subjected to periodic floods which reduced salinities to 0%o and decreased light penetration to a few centimetres. Species composition, and temporal and spatial abundance were determined for f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::039a40a2bc5992cb859f748151c4bbae
https://www.ajol.info/index.php/az/article/view/152920
https://www.ajol.info/index.php/az/article/view/152920
Publikováno v:
African Zoology; Vol 19, No 1 (1984); 46-50
Anaesthesia was induced in the common carp, Cyprinus carpio, tiiapia, Oreochromis mossambicus and rainbow trout, Salmo gairdneri, at concentrations of 25; 50; 75 and 100 mg/1 of benzocaine-hydrochloride as well as neutralized benzocaine-hydrochloride
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::249433eeb79fc72e585c027252cbef32
https://www.ajol.info/index.php/az/article/view/152647
https://www.ajol.info/index.php/az/article/view/152647
Publikováno v:
Hydrobiologia. 288:137-150
Manganese concentrations in water and sediments of the Bronkhorstspruit River, Nooitgedacht Dam and especially in the Natalspruit River, did not fall within stated limits for the protection of aquatic life. Tissue manganese concentrations in Potamona
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::830ab4c77df83727f67a7fe835c300c2
https://doi.org/10.1007/bf00006237
https://doi.org/10.1007/bf00006237
Publikováno v:
South African Journal of Zoology. 29:152-161
The copper concentration detected in the water and sediments of the Natalspruit River, Bronkhorstspruit River and Nooitgedacht Dam exceeded certain stated limits for the protection of aquatic life. Despite considerable individual variation, the gener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d3e22a28a44ea2e9b6ec60fb83ac91a
https://doi.org/10.1080/02541858.1994.11448340
https://doi.org/10.1080/02541858.1994.11448340
Publikováno v:
Science of The Total Environment. 134:469-478
Potamonautes warreni collected from a wetland affected by effluents from industries, mines and a number of sewage purification works had variable concentrations of zinc and lead in their carapace, gills, gonads, midgut glands and muscle tissue. The h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d012b8c08347ee720fc502728b9d07e
https://doi.org/10.1016/s0048-9697(05)80049-x
https://doi.org/10.1016/s0048-9697(05)80049-x
Autor:
H.J. Schoonbee
Publikováno v:
Agriculture, Ecosystems & Environment. 37:231-237
Several species of submerged, aquatic macrophytes have become noxious weeds in eutrified rivers and impoundments in South Africa. Potamogeton pectinatus L. is one of the most extensive and troublesome of these and it has not been amenable to mechanic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0292b28757c24db77cfb4d5d1052d7e4
https://doi.org/10.1016/0167-8809(91)90152-n
https://doi.org/10.1016/0167-8809(91)90152-n
Autor:
H.J. Schoonbee, W.T. Barham
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 100:357-360
1. 1. The effects of alternating current electronarcosis, rectified current electronarcosis and chemical anaesthesia (benzocaine hydrochloride) on plasma electrolytes and on the osmotic pressure of the blood of the freshwater bream Oreochromis mossam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23d0e64b418b67f6015e1dd584726a14
https://doi.org/10.1016/0300-9629(91)90483-s
https://doi.org/10.1016/0300-9629(91)90483-s
Publikováno v:
African Zoology; Vol 26, No 4 (1991); 153-163
The Mntafufu and Mzamba Rivers have small catchment areas (178 and 505 km2, respectively) in the forested coastal belt of Transkei and have relatively small estuaries (5 and 2 km long, respectively). Although the annual rainfall is in excess of 1000
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::820daeb8136d605c3c58a5e65d58d2ed
https://doi.org/10.1080/02541858.1991.11448244
https://doi.org/10.1080/02541858.1991.11448244