FN Archimer Export Format
PT J
TI Interannual variability of fisheries economic returns and energy ratios is mostly explained by gear type
BT 
AF TRENKEL, Verena
   DAURES, Fabienne
   ROCHET, Marie-Joelle
   LORANCE, Pascal
AS 1:1;2:2;3:1;4:1;
FF 1:PDG-RBE-EMH;2:PDG-RBE-EM;3:PDG-RBE-EMH;4:PDG-RBE-EMH;
C1 Inst Francais Rech Exploitat Mer, Nantes, France.
   Inst Francais Rech Exploitat Mer, UMR Amenagement Usages Ressources & Espaces Mari, Plouzane, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
SI NANTES
   BREST
SE PDG-RBE-EMH
   PDG-RBE-EM
IN WOS Ifremer jusqu'en 2018
IF 3.534
TC 9
UR https://archimer.ifremer.fr/doc/00157/26808/24916.pdf
   https://archimer.ifremer.fr/doc/00157/26808/24917.pdf
LA English
DT Article
AB According to portfolio theory applied to fisheries management, economic returns are stabilised by harvesting in a portfolio stocks of species whose returns are negatively correlated and for which the portfolio economic return variance is smaller than the sum of stock specific return variances. Also, variability is expected to decrease with portfolio width. Using a range of indicators, these predictions were tested for the French fishing fleets in the Bay of Biscay (Northeast Atlantic) during the period 2001–2009. For this, vessels were grouped into eight fishing fleets based on the gears used and exploited species were grouped into five functional groups. The portfolio width of fleets ranged from 1–3 functional groups, or 4–19 species. Economic fleet returns (sale revenues minus fishing costs) varied strongly between years; the interannual variability was independent of portfolio width (species or functional groups). Energy ratio expressed by the ratio between fuel energy used for fishing and energy contained in landings varied from 0.3 for purse seines to 9.7 for trawlers using bottom trawls alone or in combination with pelagic trawls independent of portfolio width. Interannual variability in total sale revenues was larger than the sum of species specific sales revenue variability, except for fleets using hooks and pelagic trawlers; it increased with the number of species exploited. In conclusion, the interannual variability of economic returns or energy ratios of French fisheries in the Bay of Biscay did not decrease with the number of species or functional groups exploited, though it varied between fleets.
PY 2013
PD JUN
SO Plos One
SN 1932-6203
PU Public Library Science
VL 8
IS 7
UT 000323369700151
DI 10.1371/journal.pone.0070165
ID 26808
ER

EF