FN Archimer Export Format PT J TI Choosing survey time series for populations as part of an ecosystem approach to fishery management BT AF TRENKEL, Verena COTTER, John AS 1:1;2:2; FF 1:PDG-DOP-DCN-EMH;2:; C1 IFREMER, Dept EMH, F-44311 Nantes, France. CEFAS Lowestoft Lab, Lowestoft NR33 0HT, Suffolk, England. C2 IFREMER, FRANCE CEFAS, UK SI NANTES SE PDG-DOP-DCN-EMH IN WOS Ifremer jusqu'en 2018 copubli-europe IF 1.227 TC 15 UR https://archimer.ifremer.fr/doc/2009/publication-6900.pdf LA English DT Article CR EVHOE 2000 EVHOE 2001 EVHOE 2002 EVHOE 2003 EVHOE 2004 EVHOE 2005 EVHOE 871 EVHOE 882 EVHOE 883 EVHOE 894 EVHOE 905 EVHOE 916 EVHOE 927 EVHOE 948 EVHOE 959 EVHOE 97 EVHOE 98 EVHOE 99 BO Thalassa DE ;Bias;Survey based methods;Indicators AB Ecosystem assessments of fisheries based only on survey data will often have to use surveys that were designed historically for special purposes, e. g. for assessing abundances of two or three target species, or for tuning VPAs. An important question then is whether the previously collected data can provide informative time series of abundance indices and other state indicators for a wider range of target and non-target species. Some potential shortcomings of existing data series are treated in this paper leading to four questions which can guide the user to determine the suitability of an existing time series: did the survey cover the stock of each species adequately? Did survey catchability vary significantly between length or age classes? Did survey catchabilities vary significantly in space or time? Was the sampling effort sufficient? Simple methods for investigating these questions are proposed and illustrated with examples. PY 2009 PD APR SO Aquatic Living Resources SN 0990-7440 PU EDP Sciences VL 22 IS 2 UT 000267128000002 BP 121 EP 126 DI 10.1051/alr/2008057 ID 6900 ER EF