is El Nino bad news for Western Rock Lobster d Griffin, John Wilkin, Alan Pearce (CSIRO, s Chubb and Nick Caputi (Fisheries WA) kyou FRDC, Kim Badcock, Jeff Dunn, Russ Fied Mansbridge, Thomas Moore, Chris Rathbone, Ridgway, Andreas Schiller, Paul Tildesley, n Waring, Neil White, many external agencies for various data.
17
Embed
Why is El Nino bad news for Western Rock Lobster? By
Why is El Nino bad news for Western Rock Lobster? By David Griffin, John Wilkin, Alan Pearce (CSIRO, NIWA) Chris Chubb and Nick Caputi (Fisheries WA) Thankyou FRDC, Kim Badcock, Jeff Dunn, Russ Fiedler, Jim Mansbridge, Thomas Moore, Chris Rathbone, - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Why is El Nino bad news for Western Rock Lobster?
By
David Griffin, John Wilkin, Alan Pearce (CSIRO, NIWA)Chris Chubb and Nick Caputi (Fisheries WA)
Thankyou FRDC, Kim Badcock, Jeff Dunn, Russ Fiedler, Jim Mansbridge, Thomas Moore, Chris Rathbone, Ken Ridgway, Andreas Schiller, Paul Tildesley, Jason Waring, Neil White,And many external agencies for various data.
This talk
• Satellite-based currents and advection of lobster larvae
• Hydrodynamic modelling progress report
• Future directions
Three satellite views of the Leeuwin Current
Diurnal vertical migration of modelLarvae and velocity summation in layers
Conclusions (part 1)
• A consequence of vertical migration is that larvae can hold station off WA
• During El Nino, the wind effect predominates and more larvae are lost to the north.
• During La Nina, the Leeuwin current wins and more larvae are lost to the GAB.
• So, something else must be happening, eg variable mortality or growth, to explain why observed settlement variability is so much less in El Nino
Conclusions (part 2)
• ACOM3 provides dynamically consistent OBCs for regional models, but needs further development
• ROMS makes beautiful eddies,streamers, etc, but spurious flows remain. Assimilating SBTs works; we’re now working on SBSs (synthetic bathysalinographs).