@article{fdi:010049566,
  title = {{F}irst {L}agrangian {ROMS}-{IBM} simulations indicate large losses of chokka squid {L}oligo reynaudii paralarvae from {S}outh {A}frica's {A}gulhas {B}ank},
  author = {{R}oberts, {M}.{J}. and {M}ullon, {C}hristian},
  editor = {},
  language = {{ENG}},
  abstract = {{P}resent knowledge of ocean currents based on in situ observation and models suggests that passive biological material such as eggs and larvae can be advected offshore away from the {A}gulhas {B}ank, {S}outh {A}frica, and hence removed from the ecosystem on which their survival and recruitment depends. {S}uch losses have been cited as the root cause of the sudden drop in annual squid catches experienced in 2001. {I}n this study, a {L}agrangian {IBM} (individual-based model) coupled to a {ROMS} (regional ocean model system) model was used to investigate this hypothesis. {T}hree simulations were performed for 12 model months using neutrally buoyant particles released from the seabed (120 m) every second day on the mid-shelf of the eastern, central and western regions of the {A}gulhas {B}ank. {B}oundary effects and resolution precluded the release of virtual particles on the inshore spawning grounds. {P}articles were given lifespans of 40 days. {R}esults demonstrated large particle losses from the eastern {A}gulhas {B}ank (76%) and the western {A}gulhas {B}ank (64%). {I}n contrast, few particles were lost from the central {A}gulhas {B}ank (2%), making this, in terms of the model, the most suitable place on the {A}gulhas {B}ank for spawning. {V}isualisation of the {ROMS} outputs revealed that leakage on the eastern {A}gulhas {B}ank was caused by a cyclonic eddy resident in the {A}gulhas {B}ight. {S}imilarly, leakage from the western {A}gulhas {B}ank was caused by deep-water cyclonic eddies in the adjacent {A}tlantic {O}cean.},
  keywords = {{A}gulhas {B}ank ; chokka squid ; {IBM} ; {L}oligo reynaudii ; ocean modelling ; paralarvae ; recruitment ; {S}outh {A}frica},
  booktitle = {},
  journal = {{A}frican {J}ournal of {M}arine {S}cience},
  volume = {32},
  numero = {1},
  pages = {71--84},
  ISSN = {1814-232{X}},
  year = {2010},
  DOI = {10.2989/18142321003714518},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049566},
}