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Plumas Fluviais, Distribuição e Diversidade de Assembléias de Larvas de Peixes

Atualizado: 27 de ago. de 2020

Delta do rio Mackenzie River - Canadá. Imagem ENVISAT/MERIS Setembro  2009. FonteL

Delta do rio Mackenzie River – Canadá. Imagem ENVISAT/MERIS Setembro 2009. Fonte


In the Beaufort Sea, freshwater input from the Mackenzie River creates a relatively warm and turbid plume across the coastal shelf region. To determine the influence of this plume on marine larval fish abundance, distribution, and assemblages, we sampled larval fish during July and August of 2007 using 500 μm bongo nets on transects across the plume gradient at three sampling stations per transect, along with oceanographic measurements. Three larval fish assemblages were identified within three distinct oceanographic zones: intense plume, diffuse plume and oceanic. The intense plume assemblage was dominated by Saffron cod (Eleginus gracilis) and Pacific herring (Clupea pallasii); the diffuse plume assemblage was dominated by the Pricklebacks (sub-family Lumpeninae); and the oceanic assemblage was dominated by Arctic cod (Boreogadus saida). Even though there were differences in relative abundance of particular species among these areas, no significant differences in total abundances of larval fish were found.

Referência Completa: Sally Wong, Wojciech Walkusz, Mark Hanson, Michael H. Papst. The influence of the Mackenzie River plume on distribution and diversity of marine larval fish assemblages on the Canadian Beaufort Shelf Journal of Marine Systems, Available online 16 February 2013.

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