FN Archimer Export Format
PT J
TI Different surveys provide similar pictures of trends in a marine fish community but not of individual fish populations
BT 
AF TRENKEL, Verena
   PINNEGAR, John
   ROCHET, Marie-Joelle
   RACKHAM, Brian
AS 1:;2:;3:;4:;
FF 1:PDG-DRV-RH-MAERHA;2:;3:PDG-DRV-RH-MAERHA;4:;
C1 IFREMER, Lab MAERHA, F-44311 Nantes 3, France.
   Ctr Environm Fisheries & Aquaculture Sci, Lowestoft Lab, Lowestoft NR33 0HT, Suffolk, England.
C2 IFREMER, FRANCE
   CEFAS, UK
SI NANTES
SE PDG-DRV-RH-MAERHA
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 1.105
TC 23
UR https://archimer.ifremer.fr/doc/2004/publication-899.pdf
LA English
DT Article
CR EVHOE 2000
   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 ;Trawl;Survey;Species diversity;Size spectrum;Celtic Sea;Abundance
AB Choice of sampling method and survey period can have an important impact on the perception of the structure and dynamics of an ecological community. For the Celtic Sea fish assemblage we compared data obtained by three different trawl surveys: an autumn groundfish survey with a GOV trawl, and a spring and an autumn groundfish survey, both carried out with a Portuguese high-headline trawl. Time-series of abundance estimates were not consistent among surveys for all species and were generally very noisy. An analysis of variance components showed that the sampling method contributed more to the variance in abundance estimates compared to survey period, interannual variability, or even sampling variance. Overall community assessments based on indicators such as proportions of non-commercial and piscivorous species, and the proportion of benthic species showed similar trends for all data series. The shape of the size spectrum based on abundances per length class summed over all fish species, although stable over time, was highly sensitive to the sampling method. With the exception of size spectra, community indicators for marine fish assemblages monitored by surveys seem to be robust to survey period and trawling gear, but species abundance trends are method dependent.   
PY 2004
PD MAY
SO ICES Journal of Marine Science
SN 1054-3139
PU Elsevier
VL 61
IS 3
UT 000221440300005
BP 351
EP 362
DI 10.1016/j.icesjms.2004.01.004
ID 899
ER

EF