Consulta: subjectFacets:"Stock"
Registros recuperados: 34
Data/hora: 06/06/2024 06:23:24

ESTUDIO POBLACIONAL DEL RECURSO ANCHOVETA (ENGRAULIS RINGENS JENYNS 1842) (CLUPEIFORMES, ENGRAULIDAE), MEDIANTE ANALISIS DE ADN
Provedor de dados: 72
Autores: Ferrada,Sandra; Hernández,Klaudia; Montoya,R.; Galleguillos,Ricardo.
Se estudió la variabilidad de 2 genes nucleares, el intrón 4/5 del gen de Calmodulina (CaM) por amplificación PCR y la región ITS (Internal Transcribed Spacers) del ADNr, por PCR y digestión en 139 ejemplares de E. ringens provenientes de las costas de Iquique (20°13'S; 70°09'W) y Talcahuano (36°41'S; 73°06'W). Para CaM se identificaron 8 genotipos en las muestras de Talcahuano y 7 en Iquique, presentando 1 a 3 fragmentos amplificados de 550 a 1.100 pb. En la digestión del fragmento ITS amplificado, sólo la endonucleasa TaqªI detectó 3 diferentes genotipos, 2 presentes en Talcahuano y 3 en Iquique. Se discuten las frecuencias observadas para cada gen y área de estudio. Los resultados llevan a confirmar la existencia de un solo stock, desde un punto de...
Tipo: Journal article
Palavras-chave: Engraulis ringens; ITS; CaM; Variabilidad genética; Stock.
Ano: 2002
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382002000200022

Популяционная структура и условия формирования промыслового запаса хамсы Engraulis encrasicolus у побережья Крыма в осенне-зимний сезон 200/2008 гг.
Provedor de dados: 13
Autores: Зуев, Г. В.; Гуцал, Д. К.; Репетин, Л. Н.; Салехова, Л. П.; Мельникова, Е. Б.; Бондарев, В. А.; Мурзин, Ю. Л.
С помощью индекса отолитов установлена принадлежность хамсы, зимовавшей в 2007/2008 гг. у юго-западного и южного побережья Крыма, к черноморской популяции. Проанализирована динамика размерно-возрастной и половой структуры популяции в период зимовки, а также динамика промысла. Обсуждаются гидрометеорологические факторы, обусловившие  массовую осеннюю миграцию хамсы к черноморскому побережью Крыма.
Tipo: Journal Contribution
Palavras-chave: Хамса; Улов; Запас; Популяционная структура; Отолит; Чёрное море; Anchovy; Catch; Stock; Population structure; Otolith; Black Sea; Популяційна структура; Отоліт; Чорне море.
Ano: 2009
URL: http://repository.ibss.org.ua/dspace/handle/99011/841

Влияние температуры воды на выживание молоди и формирование промыслового запаса черноморского шпрота Sprattus sprattus phalericus (Risso) (Pisces: Clupeidae)
Provedor de dados: 13
Autores: Зуев, Г. В.; Репетин, Л. Н.; Гуцал, Д. К.; Мельникова, Е. Б.; Пустоварова, Н. И.
Изучали влияние температуры воды на выживание ранних возрастных стадий черноморского шпрота и формирование величины его промыслового запаса. Для оценки выживания молоди разных поколений (годовых классов) использовали относительную численность в популяции годовиков. На примере четырех поколений (1998 – 1999; 1999 – 2000; 2000 – 2001 и 2001 – 2002 гг.) установлена тесная связь между относительной численностью годовиков и средней температурой воды в феврале предыдущего года. Коэффициент корреляции равен  +0.98. Между величиной промыслового запаса, основу которого составляли двухгодовики, и температурой воды на ранних стадиях их развития достоверной связи не обнаружено, что дает основание рассматривать урожайность поколений в качестве основного фактора,...
Tipo: Journal Contribution
Palavras-chave: Черноморский шпрот; Температура воды; Выживание; Промысловый запас; Поколение; Улов; Black Sea sprat; Water temperature; Survival rate; Stock; Age generation; Catch Fish catch statistics Water temperature Water temperature http://aims.fao.org/aos/agrovoc/c_16063.
Ano: 2004
URL: http://repository.ibss.org.ua/dspace/handle/99011/55

Evaluation par vidéo (STAVIRO) de l’état des peuplements ichtyologiques d’intérêt halieutique du Parc Naturel Marin de Mayotte
Provedor de dados: 5
Autores: Roos, David; Gaboriau, Matthias; Giannasi, Paul; Maurel, Laurence; Pelletier, Dominique.
Les diagnostics des peuplements de poisson d’intérêt halieutique et des principaux stocks mettent en évidence des états contrastés à Mayotte en 2017. A l’échelle des peuplements, toutes espèces confondues, aucun signe patent d’un état non satisfaisant lié à la pression de pêche exercée n’a été observé. Cette situation s’explique en grande partie par les familles les plus diversifiées et les plus abondantes, souvent herbivores, tels que les poissons chirurgiens et les perroquets, dont l’état est jugé satisfaisant. En revanche, l’état des quatre principales familles de grands carnivores (les mérous, les vivaneaux, les capitaines et les carangues) est qualifié de non satisfaisant. La raréfaction des grandes espèces, voire la perte de diversité dans les...
Tipo: Text
Palavras-chave: État initial; Évaluation; Peuplement ichtyologique; Stock; Vidéo; STAVIRO; Abondance; Richesse spécifique; Ressources halieutiques; Poisson; Habitat corallien; Lagon; Récif; Mayotte.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59659/71413.pdf

Estimation du stock d'huîtres creuses Crassostrea gigas, en élevage en Baie de Cancale, en octobre 2002
Provedor de dados: 5
Autores: Mazurie, Joseph; Bouget, Jean-francois.
in order to estimate the carrying capacity of Mont Saint-Michel Bay, the stock (or biomass) of cupped oysters, Crassostrea gigas, cultivated intertidally, in Cancale Bay, has been estimated in october 2002. Aerial photographs, at 2 scales (1/10 000 and 1/2000), provided by the mollusc farmers union, have been used to estimate the cumulative length of surelevaged trestles (« tables ») and the occupation rate by oyster bags. A field survey, between the 7th and 9th of october 2002, has been conducted by Ifremer with the help of « Lycée Maritime de Saint-Malo », on 40 sampled stations : 3 subsample bags per station were examined (counts and weights of different age-class oysters). 309 ha out of 333 leased ha were considered exploited (after elimination of...
Tipo: Text
Palavras-chave: Baie du Mont Saint Michel; Cancale; Crassostrea gigas; Cupped oysters; Production; Biomass; Baie du Mont Saint Michel; Cancale; Crassostrea gigas; Huîtres creuses; Production; Biomasse; Stock.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-5296.pdf

Characterization and standardization of the Atlantic albacore French pelagic trawl fishery
Provedor de dados: 5
Autores: Nikolic, Natacha; Lauretta, Matthew; Patucca, Audrey; Morandeau, Gilles.
We compiled and analysed logbook data from the French trawl albacore fishery covering the period 1991–2015. The dataset comprised catch and effort data for the French fleet operating in the Bay of Biscay and Celtic Sea, as well as spatiotemporal and gear characteristics. Generalized linear modelling was used to model spatial, seasonal, environmental, and gear covariates of fleet CPUE rates. A long-term index of relative abundance is provided that can be integrated into the stock assessment of North Atlantic albacore. The analysis revealed higher albacore CPUE associated with relatively low sea surface temperature and distinct seasonal effects. The derived abundance trend for the French trawl fishery agreed with the estimated time series of stock abundance...
Tipo: Text
Palavras-chave: Albacore; Catch; Atlantic; Trawl; Fisheries; Stock.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00461/57256/59283.pdf

Les îles Éparses : vingt-cinq ans de recherche sur les tortues marines
Provedor de dados: 5
Autores: Bourjea, Jerome; Ciccione, Stephane; Lauret-stepler, Marie; Marmoex, Cyril; Jean, Claire.
Depuis le milieu des années 70, les activités de recherche sur les tortues marines des îles Éparses se sont développées de manière constante. Elles ont mis en évidence l’importance des quatre îles Éparses émergées (Europa, Juan de Nova, Glorieuses et Tromelin) qui font partie des principaux sites de ponte des tortues vertes (Chelonia mydas) de l’océan Indien et qu’elles appartiennent à 2 stocks génétiques différents pour l’espèce. Mais ces îles ne sont pas que des réservoirs de générations futures. Plus récemment, il a été montré qu’elles sont également des habitats primordiaux pour le développement des Tortues vertes et imbriquées (Eretmochelys imbricata) immatures qui y trouvent une protection contre les prédateurs et de la nourriture. L’ensemble des...
Tipo: Text
Palavras-chave: Îles Éparses; Océan Indien; Chelonia mydas; Eretmochelys imbricata; Stock; Migration; Capture accidentelle; Éparses Islands; Indian Ocean; Chelonia mydas; Eretmochelys imbricata; Stock; Migration; By-catch.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00073/18455/15999.pdf

Evaluation de la biomasse de reproducteurs et des recrues du stock de coquille Saint- Jacques de la baie de Saint- Brieuc - Résultats préliminaires
Provedor de dados: 5
Autores: Dao, Jean-claude.
L'importance du déterminisme du recrutement pour la maîtrise des ressources vivantes, par gestion des stocks halieutiques comme par aménagement avec recours à l'aquaculture extensive et au repeuplement, est maintenant une évidence. La coquille Saint-Jacques de la baie de Saint-Brieuc a été retenue pour les enquêtes préparatoires à l'établissement d'un programme sur le sujet et dans ce cadre, il a été jugé fondamental d'apporter une évaluation sur le recrutement et sur la biomasse de reproducteurs.
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Déterminisme du recrutement; Biomasse; Stock; Baie de Saint-Brieuc.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00016/12706/9628.pdf

La mytiliculture dans la Manche. Biomasses en élevage et croissance de Mytilus edulis L.
Provedor de dados: 5
Autores: Goulletquer, Philippe; Joly, Jean-pierre; Le Gagneur, Eric; Ruelle, Francois.
This report describes the mussel Mytilus edulis sampling stock strategy developed to carry out stock assesments along the French Normandy coastline between 1989 and 1993. The overall totalnetweight reached 13,992 metric tons in 1993 with 27% precision level. Simultaneously, a growth study was carried out on 36 experimental sites to estimate overall variability. Individual total weight varied from 6.6 to 12 g at rearing cycle completion. An empirical management model conceming the Western Cotentin rearing areas was proposed and explained 68% of total weight variance. Based on a stepwise multilinear relationship, the model linked overall growth performance to local stocking density, tidal distribution, and distance from the main runoffs inputs. It aims to...
Tipo: Text
Palavras-chave: Mytilus edulis; Manche; Stock; Croissance; Mytilus edulis; Manche; Stocking density; Growth.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00072/18360/15932.pdf

Estimation des stocks de moules de gisements naturels dans la baie de Bourgneuf en 1986
Provedor de dados: 5
Autores: Baud, Jean-pierre; Haure, Joel.
L'estimation de stocks de mollusques non cultivés et plus particulièrement des moules de gisements naturels a été effectuée pour la première fois dans la Baie de Bourgneuf en Novembre 1986. Cette étude a fourni les résultats suivants; le stock total s'élève à 40 068 tonnes de moules de gisement naturel avec une précision de 49%. Pour obtenir cette estimation globale, trois secteurs ont été échantillonnés : la zone du Fain en eau profonde, qui représente 19 930 tonnes de moules (précision de 58%) et deux secteurs situés dans la zone de balancement des marées, à l'ouest du premier secteur qui sont estimés respectivement à 6 172 tonnes (précision 54%) et 3 966 tonnes (précision 186%). Cette étude montre l'importance des gisements naturels de moules dans ce...
Tipo: Text
Palavras-chave: Conchyliculture; Biomasse; Stock; Moules; Gisements naturels; Baie de Bourgneuf; Mytilus edulis.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00047/15874/13295.pdf

Differentiation of albacore stock: review by oceanic regions
Provedor de dados: 5
Autores: Nikolic, Natacha; Bourjea, Jerome.
Because one of the most common problems in fisheries is the definition of management units, we propose in this paper a bibliometric review focusing on the differentiation of Albacore populations, Thunnus alalunga, among and within oceanic regions (Atlantic, Pacific and Indian Oceans, and Mediterranean Sea). This paper is the first step of a current work on a global review of Albacore tuna using an international aquatic database (ASFA). For the present purpose, 367 publications, mainly composed of articles (64%), but also conference papers, proceedings and reports (24%), and books (12%), were analyzed. We will see that the concept of the stock and its delimitation is controversial because of the divergence of results. Such a conclusion makes us believe in...
Tipo: Text
Palavras-chave: Albacore; Stock; Structure; Distribution; Thunnus alalunga.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00149/25990/24085.pdf

Estimation du stock de moules sur bouchots en baie du Mont Saint-Michel
Provedor de dados: 5
Autores: Gerard, Denis.
The quantity of mussels cultivated on wooden poles called « bouchots », in Mont Saint-Michel bay, has been estimated in april 2002, by volume, number and weight. To do so, a sampling strategy has been conceived, operated and then optimized, taking into account the spatial distribution of this stock and the material and human constraints (especially the amount of persons and working days available). The sampling plan uses procedures of stratification, degrees, regression, so as to reach the optimum precision related to cost. The operation took a great advantage of the efficient help of mussel farmers. During the first day, the task consisted to estimate the number and position of poles occupied by mussels, with the help of 5 persons on boat. The following 2...
Tipo: Text
Palavras-chave: Mont Saint Michel; Sampling; Biomass; Stock; Mussels; Mont Saint Michel; Échantillonnage; Biomasse; Bouchot; Stock; Moules.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-5304.pdf

Evaluation du descripteur 3 « espèces exploitées à des fins commerciales » en France métropolitaine.
Provedor de dados: 5
Autores: Foucher, Eric; Delaunay, Damien.
The Marine Strategy Framework Directive (MSFD), adopted in June 2008, commits Member States to adopt an ecosystemic approach to manage the marine environment. By this directive, France aims to achieve good environmental status of its marine waters by 2020. Descriptor 3 stipulates that populations of all commercially exploited fish and shellfish are within safe biological limits, exhibiting a population age and size distribution that is indicative of a healthy stock. The Marine Directive builds on existing European Union (EU) legislation as the Common Fisheries Policy (CFP) and criteria describing stocks status are derived from international authorities works as the International Council for the Exploration of the Sea (ICES), the General Fisheries...
Tipo: Text
Palavras-chave: DCSMM; Descripteur 3; Bon état écologique; Ressources halieutiques; Espèces commerciales; Stock; Evaluation de stock.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00458/57009/58908.pdf

OTOLITHE –ESPADON : Evaluation de la structure du stock d’espadon de l’océan indien à partir des analyses de forme des otolithes
Provedor de dados: 5
Autores: Bourjea, Jerome; Mille, Tiphaine; Evano, Hugues; Mahe, Kelig.
L’espadon (Xiphias gladius) de l’océan Indien est actuellement une ressource évaluée comme étant pleinement exploitée à l’échelle de cet océan, avec un risque de surexploitation dans le sud-ouest de l’océan Indien. Une précédente étude a permis de démontrer que les espadons de l’océan Indien ne formaient qu’une seule et même population génétique (conclusion du projet IOSSS – ESPADON). L’objectif de ce projet a été d’explorer la forme de 395 otolithes d’espadons collectés dans sept zones différentes de l’océan Indien pour identifier s’ils provenaient de stocks différents ou non.  Cette étude a permis de tirer 5 conclusions principales : les otolithes gauche et droit de l’espadon sont significativement similaires. 1- il n’y a pas d’effet de la taille des...
Tipo: Text
Palavras-chave: Espadon; Xiphias gladius; Otolithe; Descripteur de Fourier; Stock; Océan Indien; Forme.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38324/36565.pdf

Fonctionnement écosystémique de la lagune de Biguglia. Partie 2 : Déploiement du modèle écosystémique GAMELag sur la lagune de Biguglia
Provedor de dados: 5
Autores: Pete, Romain; Fiandrino, Annie; Malet, Nathalie.
Afin d’apporter des éléments de réponse quantitatifs à ces questions, un outil numérique GAMELag a été développé en collaboration avec l’UMR ECOSYM en se basant sur l’approche LOICZ. Par suite ce modèle « simple » (modèle en boîtes avec calcul de bilan de matière aux interfaces) a été affiné au cours de phases successives de validation. La présente étude vise à déployer le modèle écosystémique « GAMELag » permettant d’évaluer les flux et stock d’azote et de phosphore dans la lagune de Biguglia. L’objectif est de i) valider le fonctionnement du modèle sur la lagune de Biguglia et ii) de fournir aux gestionnaires des résultats en réponse à différents scenarios hydroclimatiques (année sèche/pluvieuse) ou selon différentes options de gestion, notamment...
Tipo: Text
Palavras-chave: Modèle écosystémique; GAMELag; Flux; Stock; Azote; Phosphore; Scenarios écologiques.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71564/70011.pdf

Rapport d'activités 2003 de la station Ifremer de la Tremblade
Provedor de dados: 5
Shellfish research laboratory in Pertuis Charentais (France) present the main results concerning its activity during the year 2003. Water quality monitoring, growth, mortality and condition indices are performed on oysters ansd mussels all along the year. Shellfich stock assessment and its spatial distribution, summer mortalities events are the main research topics developped
Tipo: Text
Palavras-chave: Stock; Mortality; Growth; Hydrology; Mussel culture; Stock; Mortalité; Croissance Organisme; Hydrologie; Conchyliculture.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-333.pdf

Étude préparatoire a une reconquête des niveaux de ressource en langouste royale (Palinurus elephas) en mer d'Iroise
Provedor de dados: 5
Autores: Latrouite, Daniel; Lazure, Pascal.
The study conducted in the framework of an agreement between Ifremer and the Local fisheries committee at Audierne is part of a project to restore spiny lobster Palinurus elephas stock levels in the Iroise Sea. It is supported by professional fishermen from Finistère and by the Regional fisheries committee of Brittany.  After a brief review of the way lobster stocks are managed worldwide, followed by the major biological and ecological features of red lobster and the state of fisheries in Europe and North Africa, the very poor state of the resource along French coast is borne out by the statistics of landings.   Various scenarios (not alternatives) to promote the rebuilding of the biomass are suggested:  minimum landing size increase, seasonal closure of...
Tipo: Text
Palavras-chave: Phyllosoma; Iroise; Stock; Rebuilding; Overfishing; Palinurus elephas; Red lobster; Phyllosomes; Iroise; Stock; Reconstitution; Surexploitation; Palinurus elephas; Langouste rouge.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1198.pdf

Caractérisation biologique et variation des captures de la grande alose (Alosa alosa) par unité d'effort sur le fleuve Adour (Pyrénées Atlantiques, France)
Provedor de dados: 5
Autores: Prouzet, Patrick; Martinet, Jean-pierre; Badia, Jacques.
The study of logbooks from commercial fishermen on the Adour River and commercial samples allowed characterization of the allis shad population (Alosa alosa L.) caught during the period 1988-91. A better knowledge of the influence of hydroclimatic factors (rate of river flow and intensity of tidal coefficient) on the catchability of the species in that never was also obtained. Allis shad are mainly recruited to this fishery from the beginning of April to the end of May: between 78 and 89 % depending on year. Males in the population were on average younger than females. However, at the same age, males were significantly smaller in size and in weight than females. These results reinforce the knowledge already obtained on French stocks in the Loire and...
Tipo: Text
Palavras-chave: Alosa alosa; Grande alose ou alose vraie; Clupéidés; Captures; Stock; Pêche; Âge; Débit fluvial; Courant de marée; Atlantique; Alosa alosa; Allis shad; Clupeidae; Catch; Fishing effort; Stock assessment; Age composition; Flow and tidal currents; Atlantic.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00188/29891/28336.pdf

Estimation du stock de coques (Cerastoderma edule) élevé dans le Traict du Croisic en 2001.
Provedor de dados: 5
Autores: Haure, Joel; Papin, Mathias; Palvadeau, Hubert; Sauriau, Pierre-guy; Nourry, Max; Penisson, Christian; Dupuy, Beatrice; Martin, Jean-louis.
Le Traict du Croisic représente une surface de 650 hectares dont 180 hectares sont dédiés à la conchyliculture. Bien que divers types d’élevage soient pratiqués (huîtres creuses Crassostrea gigas, moules Mytilus edulis, palourdes Venerupis spp.), l’élevage de la coque Cerastoderma edule représente, à lui seul, 140 hectares de concessions soit 76 % de la surface allouée à l’exploitation conchylicole. La production de coques est de 1200 à 2000 tonnes par an, ce qui fait du Traict le premier centre d’élevage et le deuxième producteur français après la baie de Somme où 2500 tonnes par an sont extraites de l’exploitation des gisements naturels (Bonnel, 1986). Il existe peu d’études scientifiques sur l'élevage de la coque dans le Traict du Croisic. Les...
Tipo: Text
Palavras-chave: Crastoderma edule; Coque; Conchyliculture; Stock; Biomasse.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00326/43765/43322.pdf

Fonctionnement écosystémique de la lagune de Biguglia. Partie 3 : Scénarios écologiques
Provedor de dados: 5
Autores: Pete, Romain; Malet, Nathalie.
Afin d’apporter des éléments de réponse quantitatifs à ces questions, un outil numérique GAMELag a été développé en collaboration avec l’UMR ECOSYM en se basant sur l’approche LOICZ. Par suite ce modèle « simple » (modèle en boîtes avec calcul de bilan de matière aux interfaces) a été affiné au cours de phases successives de validation. La présente étude vise à déployer le modèle écosystémique « GAMELag » permettant d’évaluer les flux et stock d’azote et de phosphore dans la lagune de Biguglia. L’objectif est de i) valider le fonctionnement du modèle sur la lagune de Biguglia et ii) de fournir aux gestionnaires des résultats en réponse à différents scenarios hydroclimatiques (année sèche/pluvieuse) ou selon différentes options de gestion, notamment...
Tipo: Text
Palavras-chave: Modèle écosystémique; GAMELag; Flux; Stock; Azote; Phosphore; Scenarios écologiques.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71565/70025.pdf

Etude et modélisation de la dynamique des populations de bivalves en élevage (Crassostrea gigas et Mytilus galloprovincialis) dans le bassin de Thau (Méditerranée, France) et des ascidies solitaires associées
Provedor de dados: 5
Autores: Gangnery, Aline.
The total standing stock of bivalves cultured in Thau Lagoon (France) that is mainly constituted of the Pacific oyster, Crassostrea gigas, and the Mediterranean mussel, Mytilus galloprovincialis, vary between 14,000 and 20,000 tons within a year. These variations were attributed to the rearing cycle of molluscs in the lagoon but also to their growth performances. Oysters cultured in the Thau Lagoon presented the best growth rate ever reported whereas trophic conditions are low : mean concentrations in organic particulate matter and total chlorophyll a averaged 1 mg.l-1 and 1.2 µg.l-1, respectively. The development of a growth model shows that temporal pattern (i.e. seasonality) of bivalve growth is explained by water temperature and spatial pattern is...
Tipo: Text
Palavras-chave: Lagoon ecosystem; Resource management; Rearing strategies; Production; Standing stock; Hydrobiology; Growth; Shellfish culture; Ascidiella aspersa; Mussel; Oyster; Ecosystème lagunaire; Gestion des ressources; Stratégies d'élevage; Production; Stock; Hydrobiologie; Croissance; Conchyliculture; Ascidiella aspersa; Moule; Huître.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/these-102.pdf

Large-scale genetic panmixia in the blue shark (     Prionace glauca     ): a single worldwide population, or a genetic lag-time effect of the “grey zone” of differentiation?
Provedor de dados: 5
Autores: Bailleul, Diane; Mackenzie, Alicia; Sacchi, Olivier; Poisson, Francois; Bierne, Nicolas; Arnaud-haond, Sophie.
The blue shark Prionace glauca, among the most common and widely studied pelagic sharks, is a top predator, exhibiting the widest distribution range. However, little is known about its population structure and spatial dynamics. With an estimated removal of 10 to 20 million individuals per year by fisheries, the species is classified as “Near Threatened” by International Union for Conservation of Nature. We lack the knowledge to forecast the long-term consequences of such a huge removal on this top predator itself and on its trophic network. The genetic analysis of more than 200 samples collected at broad scale (from Mediterranean Sea, North Atlantic and Pacific Oceans) using mtDNA and nine microsatellite markers allowed to detect signatures of genetic...
Tipo: Text
Palavras-chave: Blue shark; Conservation; Fisheries; Genetic panmixia; Prionace glauca; Stock.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00417/52866/53776.pdf

Projet GERMON. Structure génétique et migration du thon Germon
Provedor de dados: 5
Autores: Nikolic, Natacha; Puech, Alexis; Chouvelon, Tiphaine; Munschy, Catherine; Bodin, Nathalie; Brach-papa, Christophe; Potier, Michel; West, Wendy; Knoery, Joel; Zudaire, Iker; Dhurmeea, Zahirah; Degroote, Maxime; Cedras, Maria; Evano, Hugues; Bourjea, Jerome.
The GERMON project had several aims i) to understand the populations’ structure between albacore tuna southwest of the Indian Ocean and southeast Atlantic, ii) to determine the origin of juveniles observed in South Africa iii) to improve the understanding of the biology field (Size/Size and Size/Weight; reproduction and feeding area; trophic linkages) and iv) to initiate work on chemical analyzes and adaptation of the albacore species to its environment. These aims have been held and the results allow a better understanding of the management albacore. A general summary of results is presented in Part 9.
Tipo: Text
Palavras-chave: Germon; Thunnus alalunga; Génétique; Stock; Structure; Connectivité; Chimie; Reproduction; Alimentation; Habitat; Albacore; Thunnus alalunga; Genetic; Stock; Structure; Connectivity; Chemical; Reproduction; Feeding behavior; Habitat.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00293/40461/39152.pdf

Perspectives d'exploitation des petits bivalves
Provedor de dados: 5
Autores: Berthou, Patrick.
Tipo: Text
Palavras-chave: France; Brittany; Bivalvia; Economics; Trade; Conservation; Catching; Stock; Fisheries; Manche Occidentale; Bretagne Sud; Bivalvia; Valorisation; Methode Capture; Gestion Stock; Exploitation.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/rapport-2208.pdf

Estimation des stocks de palourdes Ruditapes decussatus, Ruditapes philippinarum sur l'estran oléronais du bassin de Marennes-Oléron. Juin 2009
Provedor de dados: 5
Autores: Bordeyne, François; Robert, Stephane; Le Moine, Olivier; Leaute, Jean-pierre.
On French coast, Manila clam is a bivalve subject of a large activity recreational and professional hand harvest. Two species are represented in France, European Manila clam Ruditapes decussatus (native) and Japanese Manila clam Ruditapes philippinarum (introduced). Predominance of this last species (more than 90 % of number and biomass), earn them the status of invasive species. Contrary to Arcachon bay, Pont l’Abbé River or Morbihan bay, an estimation campaign of Manila clams stock on Marennes-Oléron bay had never been carried out. The objective of this study: estimate, in number and biomass, the Manila clams stock of two areas. The first affect recreational hand harvest, on Saint-Trojan shore (0.8 km²) whereas the second scopes professional hand...
Tipo: Text
Palavras-chave: Palourde; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oléron.; Manilla clam; Ruditapes philippinarum; Ruditapes decussatus; Estimation; Stock; Marennes–Oleron.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00415/52621/53459.pdf

Crepidula fornicata L. (mollusque, gastéropode) en baie de Marennes-Oléron : cartographie des fonds par sonar à balayage latéral et estimation du stock
Provedor de dados: 5
Autores: Sauriau, Pierre-guy; Pichocki-seyfried, C; Walker, P; De Montaudouin, Xavier; Palud, Cecile; Heral, Maurice.
Extensive and detailed subtidal ground mapping of the Marennes-Oleron Bay and Fouras-Aix areas was performed with a side-scan sonar. Side-scan sonographs gave a comprehensive view of sedimentological bottom environments and also allowed us to outline locations of grounds colonised by the gastropod mollusc Crepidula fornicata L. with a precise estimate of their surface. A sedimentological map of the centre of the Marennes-Oleron Bay is given, describing spatial organisation of the following four types of sediment: pure mud, fine sand, coarse sand and rocks. Crepidula beds were also recognised on sonographs and were estimated to cover 181 hectares in the Fouras-Aix area and 615 hectares within the Marennes-Oleron Bay. Standard sampling methods were then...
Tipo: Text
Palavras-chave: Crepidula fornicata; Cartographic; Stock; Sonar à balayage latéral; Marennes-OlCron; Crepidula fornicata; Mapping; Stock assessment; Side-scan sonar; Marennes-Oleron Bay.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-854.pdf

Evaluation des stocks de pétoncle d’Islande Chlamys islandica, peigne du Canada Placopecten magellanicus et concombre de mer Cucumaria frondosa du gisement du banc de Saint-Pierre (subdivision 3Ps de l’OPANO). Résultats de la campagne de prospection SPM2017-Hal (14 au 24 août 2017).
Provedor de dados: 5
Autores: Foucher, Eric.
The CORE 3Ps scallop stocks (Icelandic scallop Chlamys islandica and Giant scallop Placopecten magellanicus) and Sea cucumber (Cucumaria frondosa) stock were assessed in August 2017 in French-Canadian waters southwest of the Saint-Pierre and Miquelon archipelago on the one hand, and in the southern part of the French EEZ known as “Corridor” on the other. For this purpose, a scientific survey, based on a stratified random sampling plan in the CORE area and systematic sampling plan in the French Corridor was conducted onboard S/V Antéa, research vessel of the French Oceanographic Fleet. Although difficult weather conditions affected the survey, 80 sampling points were completed. The analysis of these data shows a slight decrease in the exploitable biomass of...
Tipo: Text
Palavras-chave: Petoncle d'Islande; Chlamys islandica; Petoncle geant; Placopecten magellanicus; Concombre de mer; Cucumaria frondosa; Saint-]Pierre et Miquelon; Stock; Evaluation de stock.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00444/55528/57116.pdf

Analyse des ressources et des caractéristiques individuelles du stock d'oursin Paracentrotus lividus (Lamarck, 1816) du territoire 64
Provedor de dados: 5
Autores: De Casamajor, Marie-noelle; Mahias, Jeremy; Bru, Noelle; Caill-milly, Nathalie.
A spatial sampling was carried out for stock assessment of sea urchin P. lividus throughout the Basque coast. A sampling, over the year, was conducted to study the reproductive cycle. This work took place over 2013 and 2014. Reproduction occurs once in spring, between May and August 2014. Among factors affecting the release of eggs, salinity, temperature and hydrodynamics show a significant inter-annual variability in the Basque coast. Thus, the period set in 2014, may fluctuate between years. For the stock, the results showed that 11.85 (+/-0.32) million individuals of harvestable biomass for 724 tones (+/- 137). Stock is spread over the entire surveyed area density and biomass decrease rapidly with depth, individuals are mainly located between 0 and 5 m....
Tipo: Text
Palavras-chave: Oursin commun; Stock; Biomasse; Reproduction; Côte basque; Conditions environnementales; Sea urchin; Stock; Biomass; Reproduction; Basque coast; Environmental conditions.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00218/32889/31373.pdf

Evaluation du stock de coquilles Saint-Jacques de la Baie de Seine et du Proche Extérieur. COMOR 32 (8-23 juillet 2002)
Provedor de dados: 5
Autores: Foucher, Eric.
Scientific scallop surveys called COMOR are carried out in the bay of Seine since 1976. Results are used by fishermen’ associations and by fishing administration to lead management measures. In this report, the scientific results of the survey COMOR 32 realised in July 2002 are described. Abundance and growth indices for scallop, by age and area, are presented. During these surveys, data about most abundant benthic species are also collected since 1998. A first assessment with five years data is made here. A global descriptive analysis is undertaken about all the species present on scallops grounds. A special zoom is applied on both species whitch could be exploited (whelk Buccinum undatum and queen scallop Aequipecten opercularis) and three competitive...
Tipo: Text
Palavras-chave: Coquille Saint-Jacques; Pecten maximus; Baie de Seine; Évaluation directe; Stock; Diagnostic; Scallop survey; Pecten maximus; Bay of Seine; Assessment; Stock.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00341/45178/44575.pdf

L'ostréiculture sur la côte Ouest du Cotentin
Provedor de dados: 5
Autores: Goulletquer, Philippe; Joly, Jean-pierre; Kopp, Joel; Legagneur, Eric; Moriceau, Jacques; Ruelle, Francois.
L'ostréiculture sur la côte Ouest Cotentin a été étudiée à partir d'estimations des stocks en élevage et de suivis de populations entre 1990 et 1992. A partir de stratégies d'échantillonnages, les stocks en élevage ont été estimés à 33 556 et 35 542 t respectivement en 1990 et 1991. Sur une production normande annuelle totalisant 34 914 tonnes, 53% a été produit sur la côte Ouest Cotentin en 1990. Un modèle global d'aménagement est proposé définissant la relation entre les performances de croissance mesurées, les cheptels en élevage, le niveau d'émersion, et la distance par rapport aux principales sources d'éléments nutritifs terrigènes. Près de 80% de la variabilité du poids final est expliqué par ce modèle régressif destiné à faciliter les décisions...
Tipo: Text
Palavras-chave: Crassostrea gigas; Stock; Croissance; Composition biochimique; Aménagement; Cotentin.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00092/20326/17972.pdf

THE QUESTIONABLE NECESSITY OF CHANGING MAIZE INTERVENTION
Provedor de dados: 31
Autores: Jancsok,   Zsuzsanna; Kato,   Norbert; Nogradi,   J.; Cseke,   Z.
The EU took clear steps to suppress and abandon the intervention of maize in 2006. Originally the measure should have been revised in the course of the “Health Check”. But the European Commission (EC) rendered the minimal quality requirement for maize stricter in the intervention period starting 1 November 2006. Later the EC proposed to finish the intervention of maize. According to that decision the intervention of maize exists in the marketing year of 2007/08 and 2008/09 with a quantity limitation but it finishes in the marketing year of 2009/10. The EC argues for the abandonment of maize intervention, because, intervention stocks of cereals have increased significantly after the accession of the 10 new member states (EU-10), and the balance of the maize...
Tipo: Journal Article
Palavras-chave: Cereal; Intervention; Maize; Stock; Agricultural and Food Policy; Agricultural Finance.
Ano: 2008
URL: http://purl.umn.edu/47547

Regulating Stock Externalities Under Uncertainty
Provedor de dados: 31
Autores: Newell,   Richard G.; Pizer,   William A.
Using a simple analytical model incorporating benefits of a stock, costs of adjusting the stock, and uncertainty in costs, we uncover several important principles governing the choice of price-based policies (e.g., taxes) relative to quantity-based policies (e.g., tradable permits) for controlling stock externalities. Applied to the problem of greenhouse gases and climate change, we find that a price-based instrument generates several times the expected net benefits of a quantity instrument. As in Weitzman (1974), the relative slopes of the marginal benefits and costs of controlling the externality continue to be critical determinants of the efficiency of prices relative to quantities, with flatter marginal benefits and steeper marginal costs favoring...
Tipo: Working or Discussion Paper
Palavras-chave: Stock; Externality; Regulation; Policy; Uncertainty; Price; Quantity; Tax; Tradable permit; Pollution; Climate change; Greenhouse Gas; Instrument choice; Risk and Uncertainty; Q28; D81; C61.
Ano: 2000
URL: http://purl.umn.edu/10471

Executive Compensation: Facts
Provedor de dados: 31
Autores: Clementi,   Gian Luca; Cooley,   Thomas.
In this paper we describe the important features of executive compensation in the US from 1993 to 2006. Some confirm what has been found for earlier periods and some are novel. Notable facts are that: the compensation distribution is highly skewed; each year, a sizeable fraction of chief executives lose money; the use of security grants has increased over time; the income accruing to CEOs from the sale of stock increased; regardless of the measure we adopt, compensation responds strongly to innovations in shareholder wealth; measured as dollar changes in compensation, incentives have strengthened over time, measured as percentage changes in wealth, they have not changed in any appreciable way.
Tipo: Working or Discussion Paper
Palavras-chave: CEO; Pay–Performance Sensitivity; Stock; Options; Financial Economics; G34; J33; M52.
Ano: 2010
URL: http://purl.umn.edu/92834

Dinâmica populacional da matrinxã Brycon amazonicus (Characidae) na Amazônia Central
Provedor de dados: 103
Autores: Santos Filho,Leocy C. dos; Batista,Vandick da S.
The matrinxã, Brycon amazonicus (Spix &amp;amp; Agassiz, 1829) is one of the most important fishery resources of the Amazonas state. Its population dynamics in Central Amazon was analyzed based on total landing and biometry data registered in the main landing port of Manaus, between 1994 and 2002. Growth and mortality rates were estimated separately for the rivers Purus, Madeira and Solimões. Differences in size structure and growth curves suggest that different population units exist among these rivers, requiring individualized evaluation and fisheries management strategies. The analysis of the yield per recruit does not indicate overexploitation. However, the highest relative exploitation rate was observed in the Madeira river. The suggested management...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fisheries; Growth; Mortality; Stock.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200001