@article{fdi:010087716,
  title = {{P}ortfolio of distribution maps for {O}ctopus vulgaris off {M}auritania},
  author = {{A}hmed-{B}abou, {D}. and {D}emarcq, {H}erv{\'e} and {M}eissa, {B}. and {B}ez, {N}icolas},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study introduces the concept of portfolios of distribution maps, which consist of the reduced set of empirical orthogonal maps that best explain spatial biomass distributions of a given species over time. {T}he approach is demonstrated for the distributions of common octopus ({O}ctupus vulgaris) off {M}auritania over the last thirty years. {T}he maps in the portfolio are the subset of empirical orthogonal maps that allowed to recover 60% of the spatiotemporal biomass distribution variance and whose temporal weights were significantly correlated with abundance. {F}or octopus during the hot season, one single map explained half of the overall variance of the distribution data, while during the cold season, the portfolio of octopus distribution maps consisted of four maps, with the temporal weights of the second map being negatively correlated with upwelling intensity six months before. {T}he size of each portfolio represents the number of distinct spatial patterns describing octopus spatial distributions. {A}ssuming that specific but hidden processes explain each biomass spatial distribution of the portfolio, the size of a map portfolio might be interpreted as a proxy for system resilience. {A} small portfolio could reflect systems that are more fragile.},
  keywords = {{S}patiotemporal distribution data ; {M}aps portfolio ; temporal dynamics ; {O}ctopus vulgaris ; {MAURITANIE} ; {ATLANTIQUE}},
  booktitle = {},
  journal = {{A}quatic {L}iving {R}esources},
  volume = {36},
  numero = {},
  pages = {15 [14 ]},
  ISSN = {0990-7440},
  year = {2023},
  DOI = {10.1051/alr/2023008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010087716},
}