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| Registros recuperados: 37 | |
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| Hidalgo, Manuel; Rouyer, Tristan; Bartolino, Valerio; Cervino, Santiago; Ciannelli, Lorenzo; Massuti, Enric; Jadaud, Angelique; Saborido-rey, Fran; Durant, Joel M.; Santurtun, Marina; Pineiro, Carmen; Stenseth, Nils C.. |
| Fisheries ecologists traditionally aimed at disentangling climate and fishing effects from the population dynamics of exploited marine fish stocks. However, recent studies have shown that internal characteristics and external forcing (climate and exploitation) have interactive rather than additive effects. Thought most of these studies explored how demographic truncation induced by exploitation affected the response of recruitment to climate, identifying a general pattern revealed to be difficult as interactions are often case-specific. Here we compared five exploited stocks of European hake Merluccius merluccius from the Atlantic Ocean and Mediterranean Sea to investigate how the interaction between internal characteristics and external forces affect the... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00079/19008/17561.pdf |
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| Berthou, Patrick; Biseau, Alain; Mellon, Capucine; Jadaud, Angelique; Rouyer, Tristan; Begot, Eric; Macabiau, Christophe. |
| Rappel de la demande (saisine 14-7383) : Une synthèse sous forme cartographique faisant apparaître les frontières maritimes (mer territoriale, ZEE) et réglementaires (zone des droits historiques, zone de pêche à accès réglementé du golfe du Lion) ainsi qu’une analyse des données relatives à l’effort de pêche déployé par les navires espagnols dans la GSA 07 sur les années 2010 à 2013, en indiquant dans un tableau, pour chaque zone (zone des droits historiques espagnols, zone de pêche à accès réglementé du golfe du Lion, reste de la GSA 07)par année et par mois, le nombre de navires présents par métiers (chalutiers ou palangriers) et le nombre de jours de présence par navire ainsi que le nombre d’heures de présence total par engin et par navire. |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00228/33961/32302.pdf |
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| Rouyer, Tristan; Bonhommeau, Sylvain; Giordano, Nicolas; Ellul, Saviour; Ellul, Giovanni; Deguara, Simeon; Wendling, Bertrand; Belhaj, Mohamed Moez; Kerzerho, Vincent; Bernard, Serge. |
| Our knowledge on the biology and ecology of marine species have improved greatly through the use of archival tags by enabling the collection on information from individual in the wild. This is specifically true for large pelagic species such as the Atlantic Bluefin tuna (ABFT, Thunnus thynnus) where, for the first time, it has been possible to confirm through fisheries-independent data, migration patterns, reproductive and feeding behaviours and habitat use. However, large-scale tagging experiments that would enable researchers to tackle group behaviour are difficult to set up. On the one hand, the impact of the actual tagging operation should be as minimal as possible to avoid any change in behaviour of the fish which could influence tag data analyses. On... |
| Tipo: Text |
Palavras-chave: Large Atlantic bluefin tuna; Electronic tagging; Release; Farming. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00466/57818/60365.pdf |
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| Rouyer, Tristan; Jadaud, Angelique; Guijarro, Beatriz; Massuti, Enric. |
| Fishery: Hake is one of the most important demersal target species for the commercial fisheries in the Gulf of Lions (GSA 7). In this area, hake is exploited by French trawlers, French gillnetters, Spanish trawlers and Spanish longliners. Since 1998, an average of 243 boats are involved in this fishery and, according to official statistics, the total annual landings for the period 1998-2013 have oscillated around an average value of 2008 tons (1736 tons in 2013). In 2009, because of the large decline of small pelagic fish species in the area, the trawlers fishing small pelagic have diverted their effort on demersal species. Between 1998 and 2013, the number of French trawlers operating in the GSA 07 has decreased by 39%, while it decreased by more than 30%... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00242/35359/33863.pdf |
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| Rouyer, Tristan; Fromentin, Jean-marc; Menard, Felix; Calzelles, B; Briand, K; Pianet, R; Planque, Benjamin; Stenseth, N. |
| The patterns of variations in fisheries time series are known to result from a complex combination of species and fisheries dynamics all coupled with environmental forcing (including climate, trophic interactions, etc.). Disentangling the relative effects of these factors has been a major goal of fisheries science for both conceptual and management reasons. By examining the variability of 169 tuna and billfish time series of catch and catch per unit effort (CPUE) throughout the Atlantic as well as their linkage to the North Atlantic Oscillation (NAO), we find that the importance of these factors differed according to the spatial scale. At the scale of the entire Atlantic the patterns of variations are primarily spatially structured, whereas at a more... |
| Tipo: Text |
Palavras-chave: Time series analysis; North Atlantic Oscillation; Atlantic tuna. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-3984.pdf |
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| David-grignot, Stephane; Lamlih, Achraf; Kerzerho, Vincent; Azaıs, Florence; Soulier, Fabien; Bernard, Serge; Rouyer, Tristan; Bonhommeau, Sylvain. |
| On-chip sine-wave signal generation is widely covered by literature for Built-In-Self Test (BIST) or biosensor applications. The objective is to generate pure and robust sinewave signal with minimal hardware resources. An attractive solution consists in combining several digital signals to built this analog sine-wave. The objective of this paper is to give an analytical study of various potential solutions based on digitalbased approaches. Thanks to this study, we prove that technique consisting in setting the phase shifts and various amplitude values of the square-wave signals is the most efficient approach. Moreover, this study allows the selection of the best solution in terms of parameters of the square-wave signals to cancel loworder harmonics of the... |
| Tipo: Text |
Palavras-chave: Harmonic cancellation; Sine-wave generation; On-chip signal generation. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00395/50608/55366.pdf |
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| Biseau, Alain; Jadaud, Angelique; Rouyer, Tristan. |
| Saisine de la DPMA (14-7383) qui souhaitait une évaluation ex-ante des effets des mesures envisageables quant à l’atteinte du RMD sur le merlu et le rouget. Dans la mesure du possible, cette évaluation devra être réalisée pour chacune des deux hypothèses suivantes : i) ces mesures s’appliquent aux seuls navires français, chalutiers et fileyeurs. ii) Ces mesures s’appliquent aux chalutiers et fileyeurs français ainsi qu’aux chalutiers et palangriers espagnols. |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00255/36591/35153.pdf |
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| Jadaud, Angelique; Rouyer, Tristan; Guijarro, Beatriz; Massuti, Enric. |
| Fishery: In the Gulf of Lions (GSA 7), red mullet is exploited by both French and Spanish trawlers. Information on French gillnetters is only available for 2011 and 2013, but although it is suspected that they have been fishing red mullet in the past, no data is available to quantify their catches. Between 2004 and 2013, around 100 boats have been involved in the fishery. According to official statistics, during this period the total annual landings have oscillated around an average value of 200 tons and the French trawlers have been dominating the fishery, as they represent 73% of the catches (165 tons) on the period. After 2009, because of the large decline of small pelagic fish species in the area, the trawlers fishing small pelagic have diverted their... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00242/35366/33867.pdf |
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| Rouyer, Tristan; Bonhommeau, Sylvain; Giordano, Nicolas; Giordano, François; Ellul, Saviour; Ellul, Giovanni; Deguara, Simeon; Wendling, Bertrand; Bernard, Serge; Kerzerho, Vincent. |
| Atlantic bluefin tuna, Thunnus thynnus, is as an emblematic and commercially valuable large pelagic species. In the past ten years, the purse seine fishery in the Mediterranean represents more than 50 % of the catch. Nowadays, purse seines target large fish and operate during the spawning season in the spawning grounds. Electronic tagging has shed a considerable amount of light on the ecology and behaviour of bluefin tuna over the past twenty years. However, such technique has rarely been applied on large bluefin tunas caught by the Mediterranean purse seine fishery despite its major importance. The logistical constraints related to this specific fishery, combined with the timing of migration of the fish and the requirements related to the handling of big... |
| Tipo: Text |
Palavras-chave: Large Atlantic bluefin tuna; Eastern Atlantic and Mediterranean stock; Electronic tagging; Purse seine; Migrations. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00607/71876/70622.pdf |
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| Soulier, Fabien; Lamlih, Achraf; Kerzérho, Vincent; Bernard, Serge; Rouyer, Tristan. |
| Bioimpedance spectroscopy consists of measuring the complex impedance of biological tissues over a large frequency domain. This method is particularly convenient for physiological studies or health monitoring systems. For a wide range of applications, devices need to be portable, wearable or even implantable. Next generation of bioimpedance sensing systems thus require to be implemented with power and resource savings in mind. Impedance measurement methods are divided into two main categories. Some are based on “single-tone” signals while the others use “multi-tone” signals. The firsts benefit from a very simple analysis that may consist of synchronous demodulation. However, due to necessary frequency sweep, the total measurement may take a long time. On... |
| Tipo: Text |
Palavras-chave: Bioimpedance spectroscopy; Multi-frequency; Digital processing. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00589/70073/68046.pdf |
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| Rouyer, Tristan; Fromentin, Jean-marc; Stenseth, Nils Chr.. |
| Environmental variables affect many processes of fish biology and their fluctuations are thought to be one of the main factors in variability of fish stocks. Recent work has shown that the variability of the environment in the frequency domain (i.e., the environmental noise) can interact with endogenous processes (e.g., density dependence) and affect fluctuations of animal populations. In this study, we investigate whether fluctuations of large pelagics' time series are affected by environmental noise and whether life-history traits of species modulate this response. By analysing several environmental variables and a large dataset of tuna and billfish catch per unit effort (CPUE) time series from the Atlantic, we show that in environments dominated by... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00011/12230/9083.pdf |
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| Rouyer, Tristan; Bonhommeau, Sylvain; Giordano, F; Wendling, B; Ellul, S; Ellul, G; Psaila, Ma; Deguara, S; Bernard, S; Kerzerho, V. |
| Tipo: Text |
Palavras-chave: Large atlantic bluefin tuna; Mediterranean; Malta; Electronic tagging; Farming cages; Purse seiners. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00484/59609/62626.pdf |
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| Registros recuperados: 37 | |
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