Vlaams Instituut voor de Zee

platform voor marien onderzoek

In:

Open Marien Archief

Het Open Marien Archief van België (OMA) biedt vrije toegang tot de digitale publicaties over de Vlaamse kust en het Belgisch deel van de Noordzee, en alle andere mariene, estuariene en kustgebonden publicaties van Belgische auteurs en wetenschappers en van buitenlandse wetenschappers geaffilieerd aan een Belgische instelling.

Meer info

Nieuwe zoekopdracht
meld een fout in dit recordmandje (0): toevoegen | toon Print-vriendelijke versie

Ecomorphology of Crassostrea cucullata (Born, 1778) (Ostreidae) in a mangrove creek (Gazi, Kenya)
Tack, J.F.; Vanden Berghe, E.; Polk, F. (1992). Ecomorphology of Crassostrea cucullata (Born, 1778) (Ostreidae) in a mangrove creek (Gazi, Kenya). Hydrobiologia 247: 109-117
In: Hydrobiologia. Springer: Berlin. ISSN 0018-8158, meer
Peer reviewed article

Ook gepubliceerd als
  • Tack, J.F.; Vanden Berghe, E.; Polk, F. (1992). Ecomorphology of Crassostrea cucullata (Born, 1778) (Ostreidae) in a mangrove creek (Gazi, Kenya), in: Jaccarini, V. et al. (Ed.) (1992). The Ecology of Mangrove and Related Ecosystems: Proceedings of the International Symposium held at Mombasa, Kenya, 24-30 September 1990. Developments in Hydrobiology, 80: pp. 109-117, meer
  • Tack, J.F.; Vanden Berghe, E.; Polk, F. (1992). Ecomorphology of Crassostrea cucullata (Born, 1778) (Ostreidae) in a mangrove creek (Gazi, Kenya), in: (1992). IZWO Coll. Rep. 22(1992). IZWO Collected Reprints, 22: pp. chapter 37, meer

Beschikbaar in Auteurs 
Documenttype: Congresbijdrage

Trefwoorden
    Saccostrea cucullata (Born, 1778) [WoRMS]; Marien; Brak water

Auteurs  Top 

Abstract
    Variations of shell form and shell-length were studied for oysters growing in the mangroves of Gazi Creek, Kenya, and related to different environmental factors. For the study of the form, Fourier analysis was performed on the circumference of 85 oysters. The resulting coefficients were compared among specimens using cluster analysis. The correspondence between this classification and substrate diameter is virtually perfect ( only one misclassification out of 85 oysters). For the clusters based on height above chart datum, 9 specimens, a1l on intermediate height levels, were misclassified. Orientation with respect to tidal current had 13 misclassifications. Mangrove species seemed to influence form only marginally, if at all. In the study of the size of Crassostrea cucullata, the length of 956 oysters, growing along two transects were measured, and correlated with several environmental factors. Oyster length was not related to substrate diameter or its orientation with respect to the main current. Length was not influenced by density up to a cover of 70%. For densities higher than 70%, there was a fairly strong negative correlation (r = 0.634, n = 217). Length was not correlated with height above bottorn (base of the tree) for heights lower than 20 cm, while oysters growing closer to the bottom were sma1ler. The correlation with height above chart datum was negative but very low (r = 0.060, n = 957). However, if all measurements of oysters closer than 20 cm to the bottom, and all from a density of more than 70% cover are deleted from the data set, the correlation with height increased dramatica1ly, the slope still being negative (r = 0.859, n = 543).

 Top | Auteurs