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| Fonteneau, Alain; Fromentin, Jean-marc. |
| This paper develops a critical overview of the various problems and uncertainties faced in tuna stock assessment, management and conservation. This presentation is based on Atlantic tunas, but also on various tuna stocks worldwide. Tuna jisheries management is characterized by major uncertainties in the stock assessment; since these stock assessments are always done only on jishery data which are often biased. Fortunately most tuna stocks are showing a strong resistance to overfishing. These major characteristics of tuna stocks and jisheries, and the bias in the scientific analysis, are presented and discussed. As a result, many of the reference point recommended for the precautionary approach applied to jisheries are often quite inappropriate for tuna... |
| Tipo: Text |
Palavras-chave: Tunas; Precautionay approach; Atlantic; Management; Assessment. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00194/30564/28984.pdf |
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| Patucca, Audrey. |
| The works carried out during this course (March-August 2015) alowed to correct the datasets and to study the variation in catches of albacore tuna from 1967 to 2014 (except for the years 1987 to 1990) based on 3 gears: the trolling line, the line with cane and the pelagic trawl. Simultaneously, key ICCAT delivred was provide information to expert groups, with a view to defining fishing quotas. Catches released and fishing effort (defined by the number of vessels and the time spent at sea) have varied considerably over these 50 years, and have been increasing in recent years, after having decreased sharply. Fishing today is concentrated on the edge of the continental shelf, whereas it was very oceanic before. It is mainly juveniles that are caught, while... |
| Tipo: Text |
Palavras-chave: Thunnus alalunga; Captures; Atlantique; Pêcheries; Thunnus alalunga; Catch; Atlantic; Fishery. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00388/49927/50501.pdf |
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| Migotto, A.E.. |
| The paper presents the results of a general survey of the hydroid fauna of the coastal region of the São Sebastião Channel, São Paulo State, Brazil. Intensive collecting in the intertidal and infralittoral zones, from 1984 to 1992, led to the discovery of many species, some of which are small and inconspicuous. Out of 59 species of hydroids (17 athecate and 42 thecate) described and illustrated, three are new records for the Atlantic Ocean, six for the western South Atlantic, and 21 for the Brazilian coast. The medusa stage of Asyncoryne ryniensis and the cnidome of 24 species are described for the first time. The paper also contains a synopsis of the hydroids recorded from the Brazilian coast, the list now including 107 species. Pseudostenotele... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cnidaria; Hydrozoa; Systematics; Distribution; South American fauna; Atlantic; Brazil.; 42.72. |
| Ano: 1996 |
URL: http://www.repository.naturalis.nl/record/317585 |
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| Bowlby, Heather D.; Benoît, Hugues P.; Joyce, Warren; Sulikowski, James; Coelho, Rui; Domingo, Andrés; Cortés, Enric; Hazin, Fabio; Macias, David; Biais, Gerard; Santos, Catarina; Anderson, Brooke. |
| Accurately characterizing the biology of a pelagic shark species is critical when assessing its status and resilience to fishing pressure. Natural mortality (M) is well known to be a key parameter determining productivity and resilience, but also one for which estimates are most uncertain. While M can be inferred from life history, validated direct estimates are extremely rare for sharks. Porbeagle (Lamna nasus) and shortfin mako (Isurus oxyrinchus) are presently overfished in the North Atlantic, but there are no directed fisheries and successful live release of bycatch is believed to have increased. Understanding M, post-release mortality (PRM), and variables that affect mortality are necessary for management and effective bycatch mitigation. From 177... |
| Tipo: Text |
Palavras-chave: Natural mortality; Recovery period; Lamnid sharks; Atlantic; Survival; Mitigation; Bycatch. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00688/80020/83005.pdf |
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| Reis, Marcelo Rodrigues; Aquino, Leonardo Ângelo; Melo, Christiane Augusta Diniz; Silva, Daniel Valadão; Dias, Roque Carvalho. |
| Crop rotation improves potato (Solanum tuberosum L.) crops; however, in some cases, it can have some negative effects due to the herbicides previously used in crops under rotation. These effects are the decline in the yield and the appearance of physiological disorders, including cracked tubers, which impair the quality and economic value of the potato. Two field experiments were performed with applications of tembotrione and atrazine, alone or in combination. In the Rio Paranaiba (Minas Gerais State) area, in clay soil, the herbicides were applied at post-emergence in corn (Zea mays L.). After corn harvest and soil preparation, the potatoes were planted. In the Serra do Salitre (Minas Gerais State) area, in the medium texture soil, the herbicides were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic; Herbicide; Physiological disorder; Solanum tuberosum.; Matologia. |
| Ano: 2018 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35355 |
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| 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 |
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| Bouchereau, Jl; Guelorget, O. |
| This article summarizes the latest knowledge on the ecology of three gobies. The authors compile data published by various scientists who carried out their research under different conditions, using a variety of methods for collecting data and processing the results. The relationship between population structure and different environmental conditions was considered for three goby species Pomatoschistus minutus (Pallas, 1770), P. microps (Kroyer, 1838) and Gobius niger Linnaeus, 1758, in different geographical areas, notably the Mediterranean (Gulf of Lions and Adriatic) and cold temperate Atlantic (north of the English Channel) parts. In the three species, the life cycles in the Mediterranean, favoured by the local hydroclimate, are "contracted" (growth is... |
| Tipo: Text |
Palavras-chave: Golfe du Lion; Atlantique; Cycles vitaux; Stratégies d'occupation; Gobiidæ; Gulf of Lions; Atlantic; Life cycle; Occupying strategy; Gobiidae. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00326/43672/43198.pdf |
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| Wahbi, Fatima; Le Loc'H, Francois; Berreho, Amina; Benazzouz, Aissa; Ben Mhmed, Abdelouahed; Errhif, Ahmed. |
| A study of the diet of the Atlantic horse mackerel Trachurus trachurus (Linnaeus, 1758) was carried out on the Atlantic coast of Southern Morocco, located from Cap Boujdour to Cap Blanc (26 degrees 30'N-21 degrees N latitude). This area is characterized by a permanent upwelling and is among the highly productive ecosystems of the worldwide ocean. The diet of T. trachurus was studied through qualitative and quantitative analysis of stomach contents. Samples were collected during the warm (June-July-August) and the cold seasons (November-December) in 2007 and 2008. Acoustic surveys were carried out on board of the Moroccan Amir Moulay Abdellah and the Russian Atlantida oceanographic vessels. A total of 456 stomachs were analyzed, exhibiting a diversified... |
| Tipo: Text |
Palavras-chave: Carangidae; Trachurus trachurus; Atlantic; Morocco; Diet. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00275/38652/73175.pdf |
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| Krefft, Gerhard. |
| Some problems in the geographical distribution of oceanic midwater fishes in the Atlantic Ocean are discussed. Remarkable differences were observed in the latitudinal distribution of mesopelagic fish species in the North Atlantic Ocean. These can be related to the oceanic circulation. The Gulf Stream system gives rise to a discontinuity in the position of the oceanic Polar Front. This front, a sharp bounary between subpolar and subtropical waters, follows the northern edge of the Gulf Stream in the western part of the Ocean. East of about 25 degree W the Polar Front becomes weak and untraceable. Relatively warm, high-saline-water of the North Atlantic Current flows North and northeastward by the spreading of the Mediterranean Intermediate Water. Due to the... |
| Tipo: Text |
Palavras-chave: Atlantic; Marine fish; Geographical distribution. |
| Ano: 1976 |
URL: http://archimer.ifremer.fr/doc/1976/publication-2000.pdf |
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| Marsac, F; Fonteneau, Alain; Menard, Frederic. |
| This paper discusses the hypothesis that small tunas and the various species found in association with drifting fads (such as "mahi-mahi", rainbow runner, wahoo, etc.) may be biologically trapped by such a strong association. Massive seeding of drifting artificial fads was observed worldwide during recent years. In this hypothesis, we suggest that fads may alter some biological characteristics of epipelagic populations associated with them: migration, growth, condition factors, predation and natural mortality. As fads are most often used in the equatorial currents, they tend to exhibit zonal drift. Therefore, the associated populations would be artificially transferred from one part of the ocean to another, when they would show different movement patterns... |
| Tipo: Text |
Palavras-chave: Attracting techniques Biology Conservation Fishing Migrations Purse seines Trap fishing Tuna fisheries Article Geographic Terms: A; Atlantic. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00042/15303/12636.pdf |
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| Chalk, T. B.; Foster, G. L.; Wilson, P. A.. |
| The origin and carbon content of the deep water mass that fills the North Atlantic Basin, either Antarctic Bottom Water (AABW) or North Atlantic Deep Water (NADW) is suggested to influence the partitioning of CO2 between the ocean and atmosphere on glacial-interglacial timescales. Fluctuations in the strength of Atlantic meridional overturning circulation (AMOC) have also been shown to play a key role in global and regional climate change on timescales from annual to millennial. The North Atlantic is an important and well-studied ocean basin but many proxy records tracing ocean circulation in this region over the last glacial cycle are challenging to interpret. Here we present new B/Ca-[CO32-] and boron isotope-pH data from sites spanning the North... |
| Tipo: Text |
Palavras-chave: Boron; Geochemistry; Palaeoceanography; Carbonate system; Glacial; Atlantic. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00496/60812/64631.pdf |
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| Silva,Giovani O; Bortoletto,Antonio C; Carvalho,Agnaldo DF; Pereira,Arione S. |
| ABSTRACT Many potato producers for fry industry changed from the use of potassium chloride to potassium sulfate, as there is a concept that the use of this source improves tuber quality. The aim of this work was to evaluate the effect of these two potassium sources on yield, specific gravity and chip color of potato chipping cultivars. The experiment was carried out on a Dystrophic Red Latosol, in Canoinhas, Brazil, in spring season 2016. Treatments consisted of two potato cultivars, BRSIPR Bel and Atlantic, and two sources of potassium, chloride and sulfate, applied in the furrow at the planting time, in rates based on soil analysis. Experimental design was a randomized complete block in a split-plot arrangement with four replications. Main plots were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum tuberosum; Mineral nutrition; Fertilizer; BRSIPR Bel; Atlantic. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300395 |
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| Rogerson, M.; Colmenero-hidalgo, E.; Levine, R. C.; Rohling, E. J.; Voelker, A. H. L.; Bigg, G. R.; Schoenfeld, J.; Cacho, I.; Sierro, F. J.; Lowemark, L.; Reguera, M. I.; De Abreu, L.; Garrick, K.. |
| The Atlantic-Mediterranean exchange of water at Gibraltar represents a significant heat and freshwater sink for the North Atlantic and is a major control on the heat, salt and freshwater budgets of the Mediterranean Sea. Consequently, an understanding of the response of the exchange system to external changes is vital to a full comprehension of the hydrographic responses in both ocean basins. Here, we use a synthesis of empirical (oxygen isotope, planktonic foraminiferal assemblage) and modeling (analytical and general circulation) approaches to investigate the response of the Gibraltar Exchange system to Atlantic freshening during Heinrich Stadials (HSs). HSs display relatively flat W-E surface hydrographic gradients more comparable to the Late Holocene... |
| Tipo: Text |
Palavras-chave: Atlantic; Mediterranean; Gibraltar; Heinrich Event; Last Glacial Maximum; Mediterranean Outflow. |
| Ano: 2010 |
URL: https://archimer.ifremer.fr/doc/00231/34189/32775.pdf |
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