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Behavioural observations of the common octopus Octopus vulgaris in Baía dos Tigres, southern Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CL de Beer --- Department of Ichthyology and Fisheries Science, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaObservations on the behaviour of the common octopus Octopus vulgaris were made during daytime and night-time sampling on an unexploited rocky reef habitat in Baía dos Tigres, southern Angola. The relative numerical abundance sampled was 0.47 octopus person–1 h–1 during... -
Reproductive system and the spermatophoric reaction of the mesopelagic squid Octopoteuthis sicula (Rüppell 1844) (Cephalopoda: Octopoteuthidae) from southern African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HJT Hoving MR Lipiński JJ VidelerReproductive features of the poorly known oceanic squid Octopoteuthis sicula are described and quantified to gain insight into the reproductive biology of the species. The data are based on 39 complete and partial specimens from southern African waters, collected between... -
Cephalopod diet of the Cape fur seal, Arctocephalus pusillus pusillus, along the Namibian coast: variation due to location
Item type: Journal Article • Journal: African Zoology • Authors: P.J.N. de Bruyn --- Mammal Research Institute, Department of Zoology and Entomology, South Africa M.N. Bester --- Mammal Research Institute, Department of Zoology and Entomology, South Africa S.P. Kirkman --- Mammal Research Institute, Department of Zoology and Entomology, South Africa S. Mecenero --- Avian Demography Unit, Department of Statistical Sciences, South Africa J.P. Roux --- Ministry of Fisheries and Marine Resources, Directorate of Resource Management, Lüderitz Marine Research, Namibia N.T.W. Klages --- Institute for Environmental and Coastal Management, Nelson Mandela Metropolitan University, South AfricaScats of the Cape fur seal, Arctocephalus pusillus pusillus, were sampled at four mainland colonies, Cape Cross, Atlas Bay,Wolf Bay and Van Reenen Bay, along the Namibian coast over a period of eight years (1994–2001) to assess the diversity and... -
Phylogeny of the Sepia officinalis species complex in the eastern Atlantic extends the known distribution of Sepia vermiculata across the Benguela upwelling region
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AJE Healey --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Wales NJ McKeown --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Wales WM Potts --- Department of Ichthyology and Fisheries Science, South Africa CL de Beer --- Department of Ichthyology and Fisheries Science, South Africa W Sauer --- Department of Ichthyology and Fisheries Science, South Africa PW Shaw --- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, WalesAccurate species identification and biogeographic characterisation are fundamental for appropriate management of expanding cephalopod fisheries. This study addresses this topic within the common cuttlefish Sepia officinalis species complex (S. officinalis, S. hierredda and S. vermiculata), with an emphasis on occurrence... -
A snapshot assessment of the diet of Cape fur seals Arctocephalus pusillus pusillus at Ilha dos Tigres, Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Winkler --- Department of Ichthyology and Fisheries Science, South Africa S Mannheim --- Department of Ichthyology and Fisheries Science, South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South Africa C Santos --- Biologia Faculdade de Ciências, Angola C de Beer --- Department of Ichthyology and Fisheries Science, South Africa MJ Smale --- Department of Zoology and Institute for Coastal and Marine Research, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe population of Cape fur seal Arctocephalus pusillus pusillus at Ilha dos Tigres off the coast of southern Angola is expanding. Until now the only available biological information on the population has been its demographic parameters, and this insufficiency has... -
Aspects of the reproductive biology of the common Octopus vulgaris from landings in the coastal trawl and artisanal fleets in the Atlantic waters of southern Morocco
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Oubahaouali --- Abdelmalek Essaâdi University, Morocco A Kaddouri --- Abdelmalek Essaâdi University, Morocco M Aksissou --- Abdelmalek Essaâdi University, MoroccoAn investigation of aspects of the reproductive biology of the common octopus Octopus vulgaris caught in the Atlantic waters of southern Morocco was undertaken in 2020. The study focused on the demographic structure and sexual maturity of O. vulgaris by...