MatPa_Final_ok.rdata

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Species
data were obtained from the Ocean Biogeographic Information System
(OBIS, http://www.iobis.org)
on 08/27/2014. We inventoried 16 238 200 occurrence records from
34.883 entries. We cleaned the data by identifying the synonyms,
misspellings and rare species (only one occurrence) and by
restraining it to species present in the marine environment according
to FishBase (<i>12</i>).
Synonyms were converted to accepted names. This resulted in a set of
11,503,257 occurrences for 11,345 fish species around the world. We
considered the entire occurrences available in the OBIS database
spanning from 1826 to 2013 as the occurrences inferior to 1950
represent solely 0.28% of the entire data set .We reconstructed
distribution maps for each species, defined as the convex polygon
surrounding the area where each species was observed. The resulting
polygon was divided into four parts across the world to integrate
possible discontinuity between the two hemispheres and the Atlantic
and Pacific Oceans. Then we refined each species distribution map by
removing areas where maximal depths fell outside the minimum or
maximum known depth range of the species (<i>12</i>).
Final distribution maps of well-known species were checked visually
and reviewed by the authors according to their expertise.