|
|
|
| Registros recuperados: 80 | |
|
|
| Kermorvant, Claire; D’amico, Frank; Bru, Noëlle; Caill-milly, Nathalie; Robertson, Blair. |
| Some environmental studies use non-probabilistic sampling designs to draw samples from spatially distributed populations. Unfortunately, these samples can be difficult to analyse statistically and can give biased estimates of population characteristics. Spatially balanced sampling designs are probabilistic designs that spread the sampling effort evenly over the resource. These designs are particularly useful for environmental sampling because they produce good-sample coverage over the resource, they have precise design-based estimators and they can potentially reduce the sampling cost. The most popular spatially balanced design is Generalized Random Tessellation Stratified (GRTS), which has many desirable features including a spatially balanced sample,... |
| Tipo: Text |
Palavras-chave: BAS; GRTS; LPM; Probabilistic sampling; Spatially balanced. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00509/62063/66268.pdf |
| |
|
| |
|
| |
|
|
| Caill-milly, Nathalie; Lissardy, Muriel; Bru, Noëlle. |
| The ROMELIGO project included a proposal of abundance indicators for mur-west stock using professional fishing data. The methodolgy is based on the selection of samples of representative vessels grouped in clusters with the same technical characteristics, taking into account their LPUE for specifed period and area. The analysis was conducted on an historical dataset from 2005 to 2015. To be able to update it, conditional decision trees were used to find rules to assign any new vessels to one of the predefined OTB or GNS clusters. Then, the trends of LPUE on the overall period were considered. For OTB, the number of uses shows little variation during the period. In recent years, the LPUEs calculated for the Bay of Biscay show low levels compared to the... |
| Tipo: Text |
|
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00683/79516/82170.pdf |
| |
|
|
| Sanchez, Florence; Caill-milly, Nathalie; Lissardy, Muriel. |
| This report details the results of clam stock assessment survey, which took place between 14 May and 17 June 2018 in Arcachon Bay. Co-organized with CDPMEM33, with financial support from DLAL FEAMP Arcachon Basin Val de l'Eyre, Nouvelle-Aquitaine region, the CDPMEM33 and Ifremer, the clam stock assessment and its characteristics were provided. The samples were collected from 533 sampling stations distributed over an area of 52 km², with an Hamon grab, using a generalized random tessellation stratified spatially balanced design (GRTS). Venerupis philippinarum remains the dominant species with 99 % of the population. The size distribution of Manila clam is in the range 5 – 41 mm with a main mode around 24-28 mm. In 2018, the mean densities are 39 individuals... |
| Tipo: Text |
Palavras-chave: Évaluation de stock; Palourde japonaise; Venerupis philippinarum; Bassin d’Arcachon Key words: stock assessment; Manila clam; Venerupis philippinarum; Arcachon Bay. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00477/58897/61456.pdf |
| |
|
|
| Auby, Isabelle; D'Amico, Florence; Meteigner, Claire; Rumebe, Myriam; Tournaire, Marie-pierre; Rigouin, Loic; Gouriou, Laure; Lissardy, Muriel; Sanchez, Florence; De Casamajor, Marie-noelle; Morandeau, Gilles; Ganthy, Florian; Trut, Gilles; Trut, Florence; Caill-milly, Nathalie; Oger-jeanneret, Helene; Guesdon, Stephane; Chabirand, Jean-michel; Morin, Dimitri; Piraud, Aude; Geairon, Philippe; Grizon, James; Seugnet, Jean-luc; Thomas, Gerard; Bruneau, Audrey; Soudant, Dominique; Gautier, Emeric; Michel, Valérie; Dupin, Michel. |
| Ce rapport rend compte des résultats sur les paramètres hydrologiques et le phytoplancton acquis dans le cadre de la DCE (contrôle de surveillance entre 2013 et 2018), dans les masses d’eau côtières et de transition du bassin Adour-Garonne |
| Tipo: Text |
Palavras-chave: Directive Cadre sur l’Eau; Hydrologie; Phytoplancton. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00516/62735/67113.pdf |
| |
|
|
| Caill-milly, Nathalie; Bru, Noelle; Mahe, Kelig; Borie, Catherine; D'Amico, Franck. |
| While gradual allometric changes of shells are intrinsically driven by genotype, morphometrical shifts can also be modulated by local environmental conditions. Consequently the common use of a unique dimension (usually length) to assess bivalves’ growth may mask phenotypic differences in valve shape among populations. A morphometric exhaustive study was conducted on Manila clam, Ruditapes philippinarum, by acquiring data in the French Arcachon Bay (intrasite phenotypic variability) and by comparing with other sites in the literature (intersite phenotypic variability). 2070 shells were subsampled, weighted, and automatically measured using TNPC software. Some ratios’ values indicate a relatively round and globular shape shell in comparison with other sites... |
| Tipo: Text |
|
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00116/22684/20420.pdf |
| |
|
| |
|
|
| Caill-milly, Nathalie; Leaute, Jean-pierre; Trouillet, Brice; Laborde, Jean-louis; Goumy, Cécilia; Prouzet, Patrick; Grandpierre, Alde; Lissardy, Muriel; Corlay, Jean-pierre. |
| Introduction : Intra-basin fishing is not grasped as well, partly because of a lack of distinction between pure professional fishing units and conchological units and on the other hand because of the large amount of ships. Poorly adapted codification of the equipment found in the basin is also contributing to this lack of information. Studies on the subject do exist, but the elements necessary to publish notices are not always gathered, this is leading to the proposal of a geographical systemic analysis on the basin. The steps that are being taken are complementing the development of the Geographical Information System already in place in the basin since 1993 through DEL at the Arcachon Ifremer as well as the PECOSUDE European study ¿ caractéristiques des... |
| Tipo: Text |
Palavras-chave: Uses; Regulation; Economy; Halieutics; Basin of Arcachon; Fishing; Usages; Réglementation; Economie; Halieutique; Bassin d'Arcachon; Pêche. |
| Ano: 2001 |
URL: https://archimer.ifremer.fr/doc/2001/rapport-1660.pdf |
| |
|
|
| Caill-milly, Nathalie; Duclercq, Benoit; Morandeau, Gilles; De Casamajor, Marie-noelle. |
| Introduction: With the objective of diversifying current fishing and at the request of professionals in Aquitaine, the Regional Commission of Maritime Fishing and Marine Breeding (CRPMEM) of Aquitaine has started a discussion about the possibilities of opening a shellfishery. In the context of this course of action, and because of the absence of information on the presence and size of the resource, the CRPMEM of Aquitaine asked IFREMER's Halieutic Resources Laboratory of Aquitaine (LRHA) for assistance in acquiring information on the subject. At the same time, a prospective analysis study of the exploitation of shellfish off the coast of Aquitaineregulation and business sectionwas performed by the CRPMEM of Aquitaine (Coiffec, 2006). At that same time,... |
| Tipo: Text |
Palavras-chave: France; North east atlantic; Aquitaine coasts; Fleet; Geographical zones; Sampling; Bivalvia; Shellfish fisheries. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/rapport-2217.pdf |
| |
|
| |
|
|
| De Montaudouin, Xavier; Arzul, Isabelle; Caill-milly, Nathalie; Khayati, Alice; Labrousse, Jean-michel; Lafitte, Céline; Paillard, Christine; Soudant, Philippe; Goulletquer, Philippe. |
| In 1972, France underwent an oyster (Crassostrea angulata) crisis and urgently needed to diversify its aquaculture. Thus, Asari clam (Ruditapes philippinarum) was introduced at that time for aquaculture purpose, concomitantly with the introduction of Pacific oyster (Crassostrea gigas). All Asari clam adults and spat originated from the same area (Puget Sound, WA, USA). After a promising start and the implementation of a national Research & Development program, Asari clam culture rapidly faced a series of concomitant handicaps: firstly, in spite the fact that cultural practices were optimized and locking points addressed, leasing ground availability was limited during the 1980s’ due to certain reluctance from oyster farmers to share their leases and/or... |
| Tipo: Text |
Palavras-chave: Ruditapes philippinarum; France; Aquaculture; Professional fishing; Diseases; Environmental stressors. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00366/47767/47817.pdf |
| |
|
|
| Caill-milly, Nathalie; Lissardy, Muriel; Bru, Noëlle; Dutertre, Marie-adèle; Saguet, Cassandre. |
| For data-limited stocks (DLS), professional fishing data can be used as a potential source of information, especially in the absence of appropriate scientific survey, to understand abundance evolution under realistic hypothesis on resource catchability. This work focuses on a data-filtering approach, the selected fishing effort must reflect vessel activity that is least dependent on their technical characteristics and as stable as possible over time. The variable of interest is landing by fishing sequence (landing for a given gear, gear mesh, day and ICES statistical rectangle) called LPUE. In order to account for the abundance of the species, it was necessary to consider the discards. The method thus proceeds in 4 steps: (i) focus on LPUE variability and... |
| Tipo: Text |
Palavras-chave: Data-limited stock; Commercial data; Discards; LPUE; Professional knowledge; Data filtering. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00503/61495/65305.pdf |
| |
|
|
| Caill-milly, Nathalie; Lissardy, Muriel; Leaute, Jean-pierre. |
| Striped red mullet (Mullus surmuletus) belongs to the species for which individualization of stocks is advanced by ICES in western Europe for areas including the Bay of Biscay and the areas bordering the Iberian peninsula. Since 2012, ICES has provided recommendations with regards to this stock. These recommendations are given for two years and are based on an approach adopted by ICES in 2012 in the case of insufficient data for an analytical evaluation (Data Limited Stocks, DLS). For 2013 and 2014, ICES advice consisted in a 20% reduction in catches (average of the last 3 years:- 2009-2011) as a precautionary measure. Since that, no new advice has been formulated, the advice remains the same. Considering the impacts of such measurements on the French... |
| Tipo: Text |
|
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00399/51057/52225.pdf |
| |
|
|
| Caill-milly, Nathalie; Lissardy, Muriel; Bru, Noelle. |
| The ROMELIGO project included a proposal of abundance indicators for pol-89a stock using professional fishing data. The methodolgy is based on the selection of a sample of representative vessels grouped in a cluster with the same technical characteristics, taking into account their LPUE for specifed period and area. The analysis was conducted on an historical dataset from 2005 to 2015. To be able to update it, a conditional decision tree was used to find rules to assign any new vessels to one of the predefined GNS clusters. Then, the trends of LPUE on the overall period were considered: for the past three years, the LPUEs display low levels compared to the whole series while the highest levels were observed between 2011 and 2015. No management measure... |
| Tipo: Text |
|
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00631/74351/74006.pdf |
| |
|
| |
|
|
| Talidec, Catherine; Augris, Claude; Rouyer, Armelle; Brind'Amour, Anik; Pitel-roudaut, Mathilde; Tanguy, Nina; Woillez, Mathieu; Caill-milly, Nathalie; De Casamajor, Marie-noelle; Simplet, Laure. |
| Ce rapport relatif aux ressources halieutiques présente la répartition spatiale des espèces halieutiques provenant de campagnes scientifiques de l'Ifremer. Il propose une nouvelle présentation des données par rapport à la précédente étude (2005) relative aux façades « Manche-Est » et « Loire-Gironde » : La 1ère partie du rapport concerne les façades « Bretagne » et « Sud Gascogne » La 2ème partie du rapport traite de l’ensemble de la Manche et de l’Atlantique, grâce à la mise à jour et à la standardisation de la méthodologie pour toutes les zones, englobant ainsi les 4 façades. |
| Tipo: Text |
|
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00189/30006/28486.pdf |
| |
|
| |
|
|
| Caill-milly, Nathalie; Lissardy, Muriel; Bru, Noelle; Dutertre, Marie-adèle; Saguet, Cassandre. |
| The striped red mullet (Mullus surmuletus) is a species for which ICES advances individualization of stocks in Western Europe. One of them concerns the Bay of Biscay, the waters bordering the Iberian Peninsula as well as the Celtic Sea, namely striped red mullet in Subareas and Divisions 6, 7a-c, e-k, 8, and 9a (Mur. 27.67a it-k89a). This stock is part of the Data Limited Stocks (DLS) and is currently classified in Category 5 (ICES, 2016); it is a stock for which only landings data are available. Such knowledge is insufficient to apply the ICES MSY approach and the advice rule on fishing possibilities is therefore based on the precautionary approach. For this stock, this approach is applied since 2012. For 2013 and 2014, ICES has recommended reducing... |
| Tipo: Text |
|
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00466/57750/60015.pdf |
| |
|
| |
| Registros recuperados: 80 | |
|
|
|
