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| Registros recuperados: 589 | |
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| Trancart, T.; Rochette, Sebastien; Acou, Anthony; Lasne, E.; Feunteun, Eric. |
| In the last few decades, there has been a marked decline in the number of shad (Alosa alosa and A. fallax) landed in France, which prompted the French committee of the International Union for Conservation of Nature to list shad as a ‘Vulnerable’ species in 2010. The freshwater phases of shad life cycles have been extensively studied, but the marine phases remain poorly understood. The present study aimed to provide new insights into shad ecology by describing the marine distributions of twaite and allis shad using a presence/absence model based on bycatch data from commercial fishery surveys. Depth and salinity were identified as the main factors influencing shad distribution. Both species were primarily located in shallow areas, at depths of between 0 and... |
| Tipo: Text |
Palavras-chave: Alosa alosa; Alosa fallax; Distribution; Migration; Binomial model. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00213/32397/30863.pdf |
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| Youssara, F; Gaudy, R. |
| Zooplankton from the upper 200 m of the Almeria-Oran frontal region, (east of the Alboran sea, western Mediterranean) was sampled during winter 1997, using two nets equipped with 200 and 80 mum mesh. Eight sites representative of the different hydrodynamic structures (Mediterranean water, geostrophic Atlantic jet, associated anticyclonic gyre) were investigated over 2 d, using two day- and two night-samples per site. Zooplankton biomass was correlated to chlorophyll abundance, with lowest values in the oligotrophic Mediterranean water and highest in Atlantic water. The high biomass resulted from the enhancement of the secondary production, as indicated by the greater proportion of nauplii and the increase of zooplankton metabolism and feeding. Total... |
| Tipo: Text |
Palavras-chave: Mer d’Alboran; Distribution; Front; Zooplancton; Alboran sea; Distribution; Front; Zooplankton. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00322/43348/42878.pdf |
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| Miossec, Laurence; Le Deuff, Rose-marie; Goulletquer, Philippe. |
| The Pacific oyster (Crassostrea gigas, Thunberg, 1793) is one of 20 species in the genus Crassostrea. Although native to the Japan/Korea region, C. gigas is a hardy species that has been introduced to a number of countries worldwide, including the US, Canada, the UK, France, Korea, China, New Zealand, Australia, South Africa, and South America, mainly for aquaculture purposes (Mann et al., 1991; Orensanz et al., 2002). As a result, C. gigas has become the leading species in world shellfish culture, with an estimated production of 4.6 million t in 2006 (FAO, 2008). Because C. gigas does not require additional food to sustain its growth, this species is relatively inexpensive and easy to produce. Its capacity to adapt to various environmental conditions and... |
| Tipo: Text |
Palavras-chave: Transfer; Alien species; Distribution; Introduction; Bivalvia; Crassostrea gigas; Pacific oyster. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/rapport-6945.pdf |
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| Sbrana, Mario; Zupa, Walter; Ligas, Alessandro; Capezzuto, Francesca; Chatzispyrou, Archontia; Follesa, Maria Cristina; Gancitano, Vita; Guijarro, Beatriz; Isajlovic, Igor; Jadaud, Angelique; Markovic, Olivera; Micallef, Reno; Peristeraki, Panagiota; Piccinetti, Corrado; Thasitis, Ioannis; Carbonara, Pierluigi. |
| The main characteristics concerning the distribution of two of the most important decapod crustaceans of commercial interest in the Mediterranean Sea, the deep-water rose shrimp, Parapenaeus longirostris, and the Norway lobster, Nephrops norvegicus, are studied in the European Mediterranean waters. The study is based on data collected under the MEDITS trawl surveys from 1994 to 2015 from the Gibraltar Straits to the northeastern Levantine Basin (Cyprus waters). The observed differences can be interpreted as different responses to environmental drivers related to the differing life history traits of the two species. In fact, N. norvegicus is a long-living, benthic burrowing species with low growth and mortality rates, while P. longirostris is an epibenthic,... |
| Tipo: Text |
Palavras-chave: Nephrops norvegicus; Parapenaeus longirostris; Distribution; Trawl survey; Mediterranean Sea. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60052/63331.pdf |
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| Persohn, Cecile. |
| L’objectif de ce travail de thèse était d’étudier les effets des variations environnementales observées au large des côtes françaises, sur les populations d’une sélection de poissons démersaux. Pour cela, nous nous sommes focalisés sur trois conséquences possibles des variations environnementales importantes en termes de gestion des stocks : l’abondance, la distribution et la taille des individus. Il s’agissait donc d’étudier l’effet de plusieurs facteurs environnementaux, comme la température et la salinité, sur ces trois paramètres. Néanmoins, comme l’abondance, la distribution et la taille des individus peuvent aussi être affectées par des facteurs biotiques, tels que la compétition intraspécifique ou la disponibilité en nourriture (Brett, 1979 ; Swain... |
| Tipo: Text |
Palavras-chave: Impacts environnementaux; Abondance; Distribution; Taille; Densité-dépendance; Otolithe; Relation allométrique. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00044/15573/12972.pdf |
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| Bellanger, Manuel; Macher, Claire; Guyader, Olivier. |
| Quota allocation mechanisms have distributional effects that are highly relevant to the economic organization of fisheries. In France, where fishing allocations are non-transferable, quotas are shared among Producer Organizations (POs) based on the historical landings of their members. Each PO is then responsible for implementing their own internal rules that provide individual or collective allocations to their members. This study investigates the distributional effects of the various quota management systems adopted by POs on quotas and production for the Bay of Biscay sole fishery. A comparison between initial allocations by vessel based on historical landings and actual observed landings is presented. Inequality metrics are used to quantify... |
| Tipo: Text |
Palavras-chave: Distribution; Inequality; Producer organizations; Catch shares; Common-pool resources; Fishery management. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00332/44359/43999.pdf |
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| Van Den Beld, Inge; Bourillet, Jean-francois; Arnaud-haond, Sophie; De Chambure, Laurent; Davies, Jaime S; Guillaumont, Brigitte; Olu, Karine; Menot, Lenaick. |
| The topographical and hydrological complexity of submarine canyons, coupled with high substratum heterogeneity, make them ideal environments for cold-water coral (CWC) habitats. These habitats, including reefs, are thought to provide important functions for many organisms. The canyons incising the continental slope of the Bay of Biscay have distinct morphological differences from the north to the south. CWCs have been reported from this basin in the late 19th century; however, little is known about their present-day distribution, diversity and environmental drivers in the canyons. In this study, the characteristics and distribution of CWC habitats in the submarine canyons of the Bay of Biscay are investigated. Twenty-four canyons and three locations... |
| Tipo: Text |
Palavras-chave: Cold-water corals; Habitats; Submarine canyons; Bay of Biscay; NE Atlantic; ROV; Towed camera; Distribution. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00382/49343/49733.pdf |
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| Lee, Szu-hsuan; Lee, Mao-ying; Matsunuma, Mizuki; Chen, Wei-jen. |
| With 11 species, the genus Chelidoperca is a small group of teleost fishes belonging to the Serranidae. They are bottom-dwelling fishes living on continental shelves/slopes in offshore areas or on remote seamounts/banks at depths ranging from around 40-400 m mostly in the tropical Indo-West Pacific. Over the past few years, efforts have been made to resolve the taxonomy of Chelidoperca, and subsequently four new species were described. However, these recent advances were made with a traditional approach (i.e., morphology) and limited examinable materials, usually preserved specimens, from ichthyological collections. Further investigations are still needed to address the gaps in our knowledge about their diversity, phylogeny, and biogeography. In this... |
| Tipo: Text |
Palavras-chave: Fishes; New species; Distribution; Integrated taxonomy; Diversity; West-Pacific; Tropical Deep-Sea Benthos. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00620/73231/72839.pdf |
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| Amara, Rachid; Mahe, K; Le Pape, Olivier; Desroy, N. |
| Growth, condition, diet and spatial distribution of the solenette Buglossidium luteum (Risso, 1810) were investigated along the coasts of the French Atlantic, eastern English Channel and Southern Bight of the North Sea. Distribution and habitat preferences of solenette were analysed in relation to physical and biological features presumed to influence fish distribution. B. luteum was patchily distributed and concentrated in shallow muddy and muddy-sand bottoms moderately influenced by estuarine waters (euhaline waters). In the studied area, solenette seemed to find habitats suitable for growth. Food availability was not assumed to be a limiting factor for solenette distribution in contrast to abiotic factors such as salinity. |
| Tipo: Text |
Palavras-chave: Solenette; Habitat suitability; Distribution; Feeding; Growth. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-777.pdf |
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| Moguedet, Philippe. |
| During the years 1975, 1976, 1980 and 1982 cod (Gadus morhua) tagging experiments were conducted, inside the Gulf of St. Lawrence and outside in areas south of Newfoundland, by French scientists from IFREMER St. Pierre and Miquelon laboratory, in order to study the population distribution and migration and to complement the experiments carried out by Canadian scientists. The analysis from all recoveries and results from these experiments are presented here. The relevance is that the comparison with the Canadian results would lead to a better understanding of the cod stock exchanges in the area. The migratory patterns were believed to be mainly a response to seasonal environmental condition changes. In winter the cod were noted to migrate from the central... |
| Tipo: Text |
Palavras-chave: Cod; Distribution; Environment; Migration; Northwest Atlantic. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00435/54612/55995.pdf |
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| Tserpes, George; Massutí, Enric; Fiorentino, Fabio; Facchini, Maria Teresa; Viva, Claudio; Jadaud, Angelique; Joksimovic, Aleksandar; Pesci, Paola; Piccinetti, Corrado; Sion, Letizia; Thasitis, Ioannis; Vrgoc, Nedo. |
| The present work examines the spatio-temporal biomass trends of Mullus barbatus and Mullus surmuletus in the Mediterranean Sea through the analysis of a time series of data coming from the Mediterranean International Trawl Surveys (MEDITS), accomplished annually from 1994 to 2015. The biomass of both species showed clear declining trends below 150 to 200 m depth, which were steeper in the case of M. barbatus. Increases in temporal biomass trends were observed for M. barbatus from 2008 onward in most geographic sub-areas (GSAs), while stability was mostly observed for M. surmuletus. For both species, dynamic factor analysis revealed similarities among neighbouring GSAs and the subsequent cluster analysis identified two major GSA groups corresponding to the... |
| Tipo: Text |
Palavras-chave: Red mullet; Striped red mullet; Distribution; Trends; Mediterranean. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60056/63336.pdf |
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| Carpentier, André; Coppin, Franck. |
| Ifremer carries out a yearly bottom trawl survey named Channel Ground Fish Survey (CGFS) in order to collect essential biological data on major exploited fish species in the Eastern Channel. These data are also provided to feed the indispensable historic series to the yearly assessment of resources. This report presents results of the CGFS surveys for 1997 and 1998, under two aspects : a multispecific approach of the biological assemblages and integrating an interannual analysis, then a monospecific analysis of 7 species of commercial interest, as whiting, pout, cod, red gurnard, plaice, black bream, red mullet. |
| Tipo: Text |
Palavras-chave: Campagne; Chalutage; Manche orientale; Distribution; Abondance; Répartition; Cartographie; Multiespèces; Merlan; Merlangius merlangus; Tacaud; Trisopterus luscus; Morue; Gadus morhua; Grondin rouge; Aspitrigla cuculus; Plie; Pleuronectes platessa; Griset; Spondyliosoma cantharus; Survey; Trawling; Eastern Channel; Distribution; Abundance; Cartography; Multi-species; Whiting; Merlangius merlangus; Pout; Trisopterus luscus; Cod; Gadus morhua; Red gurnard; Aspitrigla cuculus; Plaice; Pleuronectesplatessa; Black bream; Spondyliosoma cantharus; Red mullet. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00306/41762/40975.pdf |
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| Genzano, Gn; Zamponi, Mo. |
| The first studies on hydroids of the subantarctic region (SW Atlantic Ocean) were based on samples from expeditions to the Antarctic at the end of the 19th and beginning of the 20th centuries. In spite of these works, hydroids from the northern Argentine continental shelf remained unknown until the 1960s. In coastal waters off Mar del Plata, studies on hydroids have been few in number and limited to species described from preserved material. Even rudimentary ecological information is lacking in these reports. Over the past few decades, samples from oceanographic expeditions, and specimens collected directly from the intertidal rocky shore or by means of scuba diving and snorkeling, have provided heretofore unpublished information on hydropolyps of the Mar... |
| Tipo: Text |
Palavras-chave: Hydraires; Epibiosis; Distribution; Argentine; Atlantique sud-occidental; Hydroids; Epibiosis; Distribution; Argentina; SW Atlantic Ocean. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00322/43297/43033.pdf |
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| Savina, Marie; Menesguen, Alain. |
| Paphia rhombofdes is an infaunal filter-feeding bivalve, particularly widespread and abundant in the English Channel. In order to investigate the influence of the growth-related post-settlement processes on its distribution, a spatial growth model was developed and linked to an existing ecological model of the English Channel. This model was partially parameterized on the basis of a specific ecophysiological experimental study, and calibrated with growth data collected in the "Golfe Normand-Breton" (GNB), a region of the English Channel. Compared to the actual distribution of P. rhomboides, the results suggest a strong influence of the growth-related processes on the distribution of the species: particularly, the extremely low growth obtained with the... |
| Tipo: Text |
Palavras-chave: Distribution; Meroplanktonic invertebrates; Ecophysiology; Growth model; English channel; Paphia rhomboides. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3115.pdf |
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| Kiszka, Jeremy; Macleod, Kelly; Van Canneyt, Olivier; Walker, Dylan; Ridoux, Vincent. |
| Data on the distribution and habitat utilization of oceanic marine mammals are difficult to collect and yet such information is beneficial for many conservation and management purposes. Data collected during ferry-based cetacean surveys in the English Channel and Bay of Biscay between 1998 and 2002 were analysed to investigate the distribution, encounter rate, and habitat characteristics of toothed cetaceans there. In all, 17 873 nautical miles were surveyed, and 1008 encounters of 13 identified species, including delphinids, ziphiids, harbour porpoise, and sperm whale, were recorded. The common dolphin was the commonest species, followed in decreasing occurrence by striped and bottlenose dolphins, pilot whale, harbour porpoise, Cuvier's beaked whale, and... |
| Tipo: Text |
Palavras-chave: Toothed cetaceans; Platforms of opportunity; Habitat characteristics; English Channel; Encounter rate; Distribution; Bay of Biscay; Bathymetric preference. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3018.pdf |
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| Registros recuperados: 589 | |
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