Seasonal fluctuations in occurrence of inshore Bryde’s whales in Plettenberg Bay, South Africa, with notes on feeding and multispecies associations
| العنوان: | Seasonal fluctuations in occurrence of inshore Bryde’s whales in Plettenberg Bay, South Africa, with notes on feeding and multispecies associations |
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| المؤلفون: | Penry, GS, Cockcroft, VG, Hammond, PS |
| المصدر: | African Journal of Marine Science; Vol 33, No 3 (2011) |
| بيانات النشر: | NISC, 2012. |
| سنة النشر: | 2012 |
| الوصف: | Seasonal fluctuations in the occurrence of inshore South African Bryde’s whales Balaenoptera edeni were investigated between November 2005 and June 2008. Sighting data were collected in Plettenberg Bay on the south-east coast of South Africa. Bryde’s whale occurrence was modelled in relation to the following environmental covariates: sea surface temperature, chlorophyll a concentrations and wind speed. Seasonal increases in encounter rates (sightings per day) were observed during summer and autumn, with a peak in April that corresponded to increased feeding activity and above average aggregation sizes. All three environmental covariates were significant factors in terms of explaining variability in the occurrence of whales. Multispecies associations with common dolphins Delphinus capensis and Cape gannets Morus capensis were most common in summer and autumn, when feeding activity was highest.Keywords: Balaenoptera edeni, chlorophyll a, generalised linear models, multispecies associations, seasonality, SSTAfrican Journal of Marine Science 2011, 33(3): 403–414 |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1814-232X 1814-2338 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=78975075580c::8edb309607e265338569fd2002919728 https://www.ajol.info/index.php/ajms/article/view/73216 |
| رقم الأكسشن: | edsair.78975075580c..8edb309607e265338569fd2002919728 |
| قاعدة البيانات: | OpenAIRE |
PDF full text from Publisher | تدمد: | 1814232X 18142338 |
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