Original paper
Cyclestheria hislopi (BAIRD, 1895} (Branchiopoda: Conchostraca) in Yewa River, Nigeria
Egborge, Austin B. M.; Ozoro, N.
Archiv für Hydrobiologie Volume 115 Number 1 (1989), p. 137 - 148
13 references
published: Mar 23, 1989
DOI: 10.1127/archiv-hydrobiol/115/1989/137
ArtNo. ESP141011501011, Price: 29.00 €
Abstract
Qualitative investigations of the fauna of Eichhomia crassipes, the water hyacinth, revealed the presence of Cyclestheria hislopi (Baird, 1895) (Branchiopoda: Conchostraca. Family Cyclestheriidae) in Nigeria’s Yewa River. This river which is predominantly fresh for nine months of the year becomes slightly brackish from March to May, a phenomenon associated with both the pattern of rainfall and the influence of the Atlantic ocean. During the rainy season months when freshwaters predominate, transparencies are low. There is evidence to suggest that the spatial distribution of the conchostracan is salinity related. Also the data revealed that fecundity, rostral serration and post-abdominal spine development generally are size related and so morphological variability in conchostracans of the same species and size could be a useful taxonomic feature.
Keywords
Eichhornia Crassipes • water hyacinth • fecundity • rostral serration • morphological variability • Yewa River • Nigeria