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| Martins, Rodrigo S.; Roberts, Michael J.; Chang, Nicolette; Verley, Philippe; Moloney, Coleen L.; Vidal, Erica A. G.. |
| Specific gravity is an important parameter in the dispersal of marine zooplankton, because the velocity of currents, and therefore the speed of transport, is usually greatest near the surface. For the South African chokka squid (Loligo reynaudii), recruitment is thought to be influenced by the successful transport of paralarvae from the spawning grounds to a food-rich feature known as the cold ridge some 100-200 km away. The role of paralarval specific gravity on such transport is investigated. Specific gravity ranged from 1.0373 to 1.0734 g cm(-3) during the yolk-utilization phase, implying that paralarvae are always negatively buoyant, regardless of yolk content. The data were incorporated into a coupled individual-based model (IBM)-Regional Ocean... |
| Tipo: Text |
Palavras-chave: Agulhas Bank; Chokka squid; Dispersal; Paralarvae; Specific gravity. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00013/12461/9316.pdf |
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| Krug, Marjolaine; Tournadre, Jean; Dufois, F.. |
| Interactions between the Agulhas Current and the ecologically important region of the Agulhas Bank are studied through the analysis of high resolution along-track altimetry, merged mapped altimetry and in situ measurements of current speed and direction undertaken from a moored Accoustic Doppler Current Profiler (ADCP). Comparisons between current observations collected from the ADCP and the satellite altimeters are made to evaluate the validity of the analysis conducted on the altimetry. Both altimetry and in situ observations show that Natal Pulses are a major driver of variability along the eastern margin of the Agulhas Bank. On average, it is estimated that the circulation along the eastern margin of the Agulhas Bank is influenced by Natal Pulses for... |
| Tipo: Text |
Palavras-chave: Agulhas Current; Agulhas Bank; Natal pulse; Satellite oceanography; Altimetry. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00186/29676/28457.pdf |
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