Results
author = "De Pontual Helene"
Aide à l'estimation des stocks d'huîtres en élevage par télédétection basse altitude: étude de faisabilité
Author(s) :
De Pontual, Helene
Description :
Existing methods to assess the biomass of reared oyster's stocks are ail based on aerial photographs and field data.
In this study, we propose an automatic processing of the digitized aerial photographs making use of advanced vision tools such as mathematical morphology.
The implemented a1gorithms...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
French
Consequences of bias in age estimation on assessment of the northern stock of European hake (Merluccius merluccius) and on management advice
Description :
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 ...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Unsupervised Bayesian reconstruction of individual life histories from otolith signatures: case study of Sr : Ca transects of European eel (Anguilla anguilla) otoliths
Description :
The reconstruction of individual life histories from chemical otolith measures is stated as an unsupervised signal-processing issue embedded in a Bayesian framework. This computational methodology was applied to a set of 192 European eel (Anguilla anguilla) otoliths. It provided a robust and unsuper...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Tag and recapture of European hake (Merluccius merluccius L.) off the Northwest Iberian Peninsula: First results support fast growth hypothesis
Description :
In the first tagging experiment of European hake (Merluccius merluccius L.) conducted off the NW Iberian Peninsula to study hake growth in the wild we released 527 live tagged individuals. The survival rate after capture and tagging was 58%. Mortality during capture was positively correlated with de...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Growth of Northwest Iberian juvenile hake estimated by combining sagittal and transversal otolith microstructure analyses
Description :
Daily growth of Atlantic juvenile hake from Northwest Iberia has been estimated employing a new approach combining analyses of transversal and sagittal sections of the otoliths along the ventral radius. Age of juvenile hake ranging from 3 to 25 cm collected during a spring 2002 survey was estimated....
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Daily variations of the saccular endolymph and plasma compositions in the turbot Psetta maxima: relationship with the diurnal rhythm in otolith formation
Author(s) :
Edeyer Anaick
,
De Pontual Helene
,
Payan P
,
Troadec Herve
,
Severe Armelle
,
Mayer-gostan N
Description :
We studied the circadian variations of the ionic composition ([Na+], [K+], [Cl-]), total CO2 ([tot CO2]), and protein concentration ([protein]) in the plasma and endolymph in the distal and proximal sides of the sacculus in the turbot Psetta maxima. Daily variations in total plasma calcium ([tot Ga]...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Growth of European hake (Merluccius merluccius) in the Gulf of Lions based on conventional tagging
Description :
Growth of European hake was estimated from the results of a conventional tagging study in the Gulf of Lions, the first tagging experiment to have been undertaken on the species in Mediterranean waters. In all, 4277 hake 15–40 cm long were tagged and released on the inshore fishing grounds during spr...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Importance and future of individual markers for the ecosystem approach to fisheries
Description :
The use of genetic, biochemical and electronic markers in population biology and ecology has been growing tremendously during the last two decades. The first part of this paper aims at reviewing the main principles and advances of these individual markers through a few key applications on exploited ...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Manual of Fish Sclerochronology
Description :
Sclerochronology, the study of calcified structures to reconstruct the past history of living organisms, is central to fish biology and fisheries management. This manual aims to provide an overview of the current theoretical and practical aspects of sclerochronological studies. By providing informat...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English
Effects of T-bar and DST Tagging on Survival and Growth of European Hake
Description :
Controlled experiments were conducted to assess the effects of T-bar and DST tagging on post-release survival and growth of European hake. In this study, two groups of each 30 hake were considered: small fish (SF, average total length: 29.9 cm +/- 2.2 cm) and large fish (LF, average total length: 36...
Repository :
Archimer, Archive Institutionnelle de l'Ifremer
Language(s) :
English