FN Archimer Export Format
PT J
TI Consequences of bias in age estimation on assessment of the northern stock of European hake (Merluccius merluccius) and on management advice
BT 
AF BERTIGNAC, Michel
   DE PONTUAL, Helene
AS 1:1;2:2;
FF 1:PDG-DOP-DCB-STH-LBH;2:PDG-DOP-DCB-STH-LASAA;
C1 IFREMER, Ctr Brest, Lab Biol Halieut, STH LBH, F-29280 Plouzane, France.
   IFREMER, Lab Sclerochronol Anim Aquat, STH LASAA, F-29280 Plouzane, France.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-DOP-DCB-STH-LBH
   PDG-DOP-DCB-STH-LASAA
IN WOS Ifremer jusqu'en 2018
IF 1.934
TC 38
UR https://archimer.ifremer.fr/doc/2007/publication-2824.pdf
LA English
DT Article
CR MARQ'AGE 3
   MARQ'AGE 4
BO Gwen Drez
DE ;Tagging;Stock assessment;Simulation;Management;Growth;European hake;Age estimation
AB The results of a pilot tagging study on hake (Merluccius merluccius), conducted in the northern part of the Bay of Biscay in 2002, indicate that growth rates for this stock may be currently underestimated because of biased estimates of age. The impact that such a bias may have on the stock dynamics and the trends of the key population parameters, recruitment, spawning-stock biomass (SSB), and mortality are investigated. Assuming new growth parameters, a new age-length key is derived and used to produce and catch-at-age data and abundance indices, which are then used to assess the stock. Bias in estimating age affects the absolute levels of fishing mortality and stock biomass estimates, and also impacts the trend in SSB. However, trends in fishing mortality and recruitment are comparable, and the stock status with respect to precautionary reference points is broadly the same. As expected, the simulation also shows that the stock may be more reactive to changes in fishing levels, which affect medium-term forecasts. Longterm sustainable yields may also be impacted.
PY 2007
PD JUN
SO ICES Journal of Marine Science
SN 1054-3139
PU Oxford university press
VL 64
IS 5
UT 000247991500014
BP 981
EP 988
DI 10.1093/icesjms/fsm039
ID 2824
ER

EF