@article{fdi:010052966,
  title = {{T}he {K}wa{Z}ulu-{N}atal sardine run : shoal distribution in relation to nearshore environmental conditions, 1997-2007},
  author = {{O}'{D}onoghue, {S}.{H}. and {D}rapeau, {L}aurent and {D}udley, {S}.{F}.{J}. and {P}eddemors, {V}.{M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he nearshore presence of sardine {S}ardinops sagax on the {K}wa{Z}ulu-{N}atal ({KZN}) coast was investigated using sightings data collected by the {KZN} {S}harks {B}oard from 1997 to 2007. {T}he spatio-temporal distribution of sardine was described in relation to that of their predators and to environmental conditions, and subjected to generalised linear model ({GLM}) and generalised additive model ({GAM}) analyses. {V}ariables describing spatio-temporal conditions performed best in the models (r(2) = 0.52) with seasonal effects, specifically {J}une and {J}uly, making the greatest contribution towards sardine presence. {T}he contribution of the years 2003, 2006 and 2007, and the {KZN} {N}orth {C}oast, was significantly lower. {T}he predator variables were highly significant (r(2) = 0.48) with {C}ape gannets {M}orus capensis, followed by the sharks/gamefish and common dolphins {D}elphinus capensis, being most closely associated with sardine presence. {E}nvironmental variables were not as influential in the {GLM} models (r(2) = 0.23), but some variables were useful in describing conditions favouring sardine presence, namely calm current conditions, light north-westerly land breezes and stable atmospheric conditions. {I}ncreasing sea surface temperature ({SST}), moderate north to south currents, large swells and turbid water had a negative impact upon sardine presence. {N}orth-easterly and north-westerly winds and north to south currents had a cooling effect upon nearshore {SST}s, whereas south-easterly winds and increasing air temperatures caused nearshore warming. {R}esults are discussed in the context of developing an understanding of the mechanisms that govern fine-scale movements of sardine shoals during the {KZN} sardine run, with a view to predicting such movements.},
  keywords = {bottlenose dolphin ; {C}ape gannet ; common dolphin ; {D}elphinus capensis ; {M}orus capensis ; sardine run ; {S}ardinops sagax ; {SST} ; {T}ursiops aduncus},
  booktitle = {},
  journal = {{A}frican {J}ournal of {M}arine {S}cience},
  volume = {32},
  numero = {2},
  pages = {293--307},
  ISSN = {1814-232{X}},
  year = {2010},
  DOI = {10.2989/1814232x.2010.501587},
  URL = {https://www.documentation.ird.fr/hor/fdi:010052966},
}