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| Registros recuperados: 113 | |
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| Sousa,Aline N.; Bernardes,Veronica P.; Bernardo,Camila H.; Taddei,Fabiano G.; Teixeira,Gustavo M.; Costa,Rogério C.; Fransozo,Adilson. |
| ABSTRACT This study describes the reproductive and recruitment patterns of the swimming crab Achelous spinimanus (Latreille, 1819) in the Ubatuba region of the northern coast of São Paulo, Brazil. Crabs were captured monthly from January 1998 to December 1999 in 18 sites located in three bays (Ubatumirim, Ubatuba, and Mar Virado), using a commercial fishing boat. In each sampling area, bottom temperature, salinity, and organic matter content were recorded. A total of 1,911 individuals were captured: 350 adult males, 475 non-ovigerous adult females, 584 adult ovigerous females, and 502 immature individuals. Reproductive females were more abundant in deeper areas; this migration might be a strategy to improve larval dispersion and survival. Ovigerous females... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fishing; Organic matter; Recruitment; Temperature; Ubatuba. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100210 |
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| Muths, D.; Jollivet, D.; Gentil, F.; Davoult, D.. |
| The brittle star Ophiothrix fragilis (Abilgaard, 1789) constitutes a heterogeneous morphological group that can be subdivided into 4 varieties. The species is also characterized by high demographic variability. The present study explores the possibility of genetic patchiness arising due to admixture of varieties or recruitment heterogeneity. We sequenced a portion of the mitochondrial cytochrome oxidase subunit I (mtCOI) gene and genotyped 7 allozymes from 21 populations of the 2 most common varieties. While mtCOI analyses showed that all the varieties grouped together with virtually no divergence among them (< 1%), a clear divergence (18.6%) was evident between the northern Atlantic populations and individuals collected in the Mediterranean and along... |
| Tipo: Text |
Palavras-chave: Echinoderm; Allozyme; MtCOI; Population dynamics; Ecotypes; Dispersal; Recruitment. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00301/41247/40439.pdf |
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| Pouvreau, Stephane; Maurer, Daniele; Auby, Isabelle; Soletchnik, Patrick; Mille, Dominique; Bernard, Ismael; Bedier, Edouard. |
| In France, spatfall of Pacific Oysters occurs traditionally in two shellfish area of the south west of France: the Marennes-Oléron bay and the Arcachon basin. The spat collected in both sites ensures approx. 70 % of the need of the French oysters production (the other part is produced in hatcheries). But, since ten years, recruitment have become highly variable especially in Arcachon basin. For instance, in this site, spatfall (assessed at the end of the reproductive season) can vary between 50 oysters per collector to more than 20 000 oysters per collector (Figure 1). This huge variation arise questions from oysters producers and the French National Committee for Shellfish Culture want to get some explanations of the phenomenon. It is well known that... |
| Tipo: Text |
Palavras-chave: Larvae; Reproduction; Recruitment; Spatfall; Crassostrea gigas. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/acte-4543.pdf |
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| Allain, Gwenhael; Petitgas, Pierre; Lazure, Pascal. |
| A growth and survival model of the early life stages was run along virtual drift trajectories tracked in a hydrodynamic model to simulate the annual recruitment process of anchovy (Engraulis encrasicolus) in the Bay of Biscay (NE Atlantic). These biophysical simulations concerning three different years were analysed in order to investigate the influence of environment and spawning dynamics on the survival of larvae and juveniles. The location of space-time survival windows suggested major environmental mechanisms involved in simulated recruitment variability at the different scales - retention of larvae and juveniles in favourable habitats over the shelf margins and turbulence effects. These small-scale and meso-scale mechanisms were related to the... |
| Tipo: Text |
Palavras-chave: Turbulence; Retention; Recruitment; Physical biological interactions; Larval survival; IBM; Biscay; Anchovy. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3423.pdf |
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| Verin, Yves. |
| Since 1976, France participates to the International Bottom Trawl Survey (IBTS), coordinated by the International Council for Exploration of the Sea (ICES). The main objective of these surveys, which are carried out on board of research vessels, was to obtain annual forecasts of recruitment for the various commercial fish species of the North Sea. These estimates were used by ICES Working Groups to assess these various stocks and to propose management measures for the following year. In addition, the data collected during these surveys concerned biological and abundance analysis of main commercial fish species exploited by European countries in the North Sea. The results of studies were published in scientific papers and have improved knowledge in this... |
| Tipo: Text |
Palavras-chave: Fish stocks; ANE; North Sea; Juveniles; Recruitment; Abundance index; Trawling survey. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00091/20224/17876.pdf |
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| Heral, Maurice; Deslous-paoli, Jean-marc. |
| Three species of oysters have been or are cultivated in Europe: Crassostrea angulata, C. gigas, and Ostrea edulis. If we follow the taxonomic critera of Grassé, the European oysters belong to the group of Mollusca, class of Lamellibranchia or Bivalves, order of Filibranchia, family Ostreidae with two genera: C. angulata (Lamarck), Portuguese, cupped oyster; C. gigas, (Thunberg), Japanese or Pacific, cupped oyster; Ostrea edulis (Linné), fiat European oyster. Some authors think that C. gigas and C. angulata belong to the same species. lndeed, Ranson stated that the characteristics of the larvae are the same, and Menzel obtained viable hybrids (F2) between these two oysters. AIso, Buroker et al. in studying the genetic variations of proteins and enzymes of... |
| Tipo: Text |
Palavras-chave: European countries; Pathology; Methods of culture; Recruitment; Fishery; Salinity and temperature tolerances; Larval development; Growh; Biology; Oyster culture. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/publication-3038.pdf |
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| Fromentin, Jean-marc. |
| In the recent past, it has been put forward that recruitment of the North Atlantic albacore, East Atlantic bluefin tuna and North Atlantic swordfish could be related to the North AtlanticOscillation (NAO). In this document, the biological processes behind the NAO/recruitmentrelationship are further investigated. Then, the possible relationship between the East Atlanticbluefin tuna recruitment was re-investigated. The linear relationship appeared to be only due to the low frequency signal, both BFT recruitment and NAO displaying a pseudo-cyclic upwardtrend, but year-to-year fluctuations were not synchronous. The superposed epoch analysis, thatwas conducted to test for possible non-linear and non-monotonous relationship did not reveal any clear connection.... |
| Tipo: Text |
Palavras-chave: North Atlantic Oscillation; Recruitment; Bluefin; Albacore; Swordfish; Migration patterns; Time series; Spatially disaggregated data. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00194/30498/28908.pdf |
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| Lagarde, Franck; Richard, Marion; Bec, Beatrice; Roques, Cecile; Mortreux, Serge; Bernard, Ismael; Chiantella, Claude; Messiaen, Gregory; Nadalini, Jean-bruno; Hori, Masakazu; Hamaguchi, Masami; Pouvreau, Stephane; Roque D'Orbcastel, Emmanuelle; Tremblay, Rejean. |
| Reproduction and recruitment of benthic invertebrates are influenced by the climate and by the ecological structure of marine ecosystems, along with local anthropogenic pressures such as eutrophication or oligotrophication. Using the Pacific oyster Crassostrea gigas as a biological model, we tested the hypothesis that the variability in prodissoconch II (PII) size (i.e. size at metamorphosis) depends on ecological functioning. Settlement and recruitment were assessed at 5 sampling sites on the French Mediterranean shellfish farmed Thau lagoon during the main summer recruitment events in 3 consecutive years (2012-2014). Hydrobiological and planktonic analyses were conducted at 3 sampling sites. Our results showed that recruitment was extremely... |
| Tipo: Text |
Palavras-chave: Larval ecology; Recruitment; Prodissoconch II; Crassostrea gigas; Oligotrophication; Cryptophytes; Thau lagoon. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00454/56613/58334.pdf |
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| Cuvelier, Daphne; Beesau, Julie; Ivanenko, Viatcheslav; Zeppilli, Daniela; Sarradin, Pierre-marie; Sarrazin, Jozee. |
| In 2006, paired wood and slate panels, each equipped with a temperature probe, were deployed on three different localities on and around the Eiffel Tower edifice (Lucky Strike vent field, Mid-Atlantic Ridge) within close proximity of visible hydrothermal activity. Recovery of these panels took place in 2008. For this two-year deployment period, the composition of colonising organisms (both macro-and meiofauna) was assessed, along with image analyses of the deployment sites in 2006 and 2008. Very few significant differences in colonisation between organic (wood) and inorganic (slate) panels were revealed. Rather, the locality of deployment and the local environmental conditions and hydrothermal activity were found to influence taxonomic composition.... |
| Tipo: Text |
Palavras-chave: Colonisation; Organic and inorganic substrata; Mid-Atlantic Ridge; Hydrothermal; Recruitment; Diversity; Temperature. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00180/29090/27505.pdf |
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| Bergeron, Jean-pierre; Masse, Jacques. |
| The recruitment of marine fish populations is a central concern of fisheries scientists. Multiple research pathways have been explored, with emphasis of the causes of mortality affecting principally the early developmental stages of fish life. The small data set presented focuses on a feature often inadequately considered, i.e., the nutritional condition of the breeding parent fishes estimated from the levels of the RNA/DNA ratio determined in fish white muscle. This is applied to the European anchovy population inhabiting the French continental shelf of the North-east Atlantic Ocean. In four of the five years analysed, the annual recruitment shows a tight relationship with the mean values for the RNA/DNA ratio determined in the parent fish during the... |
| Tipo: Text |
Palavras-chave: Anchovy; Bay of Biscay; Breeding season; Recruitment; RNA/DNA ratio. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00109/22025/19684.pdf |
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| Registros recuperados: 113 | |
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