Diel feeding and vertical migration of Sagitta serratodentata Krohn tasmanica Thomson (Chaetognatha) in the southern Benguela |
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| Authors: | Gibbons MJ |
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| Institution: | Marine Biology Research Institute, Zoology Department, University of Cape Town, Rondebosch 7700 and Sea Fisheries Research Institute, Private Bag X2, Roggebaai 8012, Cape Town, South Africa |
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| Abstract: | The migration and diel feeding of Sagitta serratodentata tasmanicawere investigated at two stations in the southern Benguela.Pronounced diel migration and feeding was observed offshorewhere the food environment was markedly stratified. The inshorepopulation, because of the shallow bottom, did not migrate outof their prey field and did not exhibit a pronounced diel feedingpattern. Copepods comprise almost the entire diet of both populationsand, although Centropages brachiatus was heavily selected for,the data do not differentiate between size or species selection. |
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