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Birds and mammals of the northern coast of Argentina: first report of an association between birds and a feeding Pygmy Right Whale Caprea marginata: Fåglar och däggdjur utanför Argentinas norra kust: första rapporten om fåglar födosökande tillsammans med dvärgrätval Caprea marginata
2013 (English)In: Ornis Svecica, ISSN 1102-6812, Vol. 23, 117-213 p.Article in journal (Refereed) Published
Abstract [en]

When the icebreaker Oden passed between 39°36’S, 57°46’W and 39°59’S, 58°11’W on 20 November 2007, an extraordinary observation was made. A feeding Pygmy Right Whale Caprea marginata, a species rarely seen, was attended by eight Grey Phalaropes Phalaropus fulicarius, two Slender-billed Prions Pachyptila belcheri, and four Wilson’s Storm Petrels Oceanites oceanicus. The birds returned to feed around the head of the whale every time it surfaced, presumably copepod plankton straining out between the baleen. The site is off Rio de la Plata estuary where nutrient rich freshwater meets cold water of the Malvinas (Falkland) Current, creating a hotspot with high levels of plankton food. The conditions were extraordinarily favourable for observation with a calm sea, no wind and only a very weak swell. Six multispecies feeding groups were seen with a total of 42 species of birds, eleven species of whales, dolphins and porpoises, and three species of seals. Dusky Dolphins Lagenorhynchus obscurus and Great Shearwaters Puf¿- nus gravis were predominant in the groups.

Place, publisher, year, edition, pages
2013. Vol. 23, 117-213 p.
Keyword [en]
OSO 2007
National Category
Natural Sciences
Research subject
SWEDARP 2007/08, Oden Southern Ocean 2007/08
URN: urn:nbn:se:polar:diva-1844OAI: diva2:693978
Available from: 2014-02-05 Created: 2014-02-05 Last updated: 2015-12-02

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