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| Registros recuperados: 63 | |
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| Siddique, Mohammad A. Momin; Butts, Ian A. E.; Linhart, Otomar; Macias, Adrian D.; Fauvel, Christian. |
| Studying gamete biology can provide important information about a species fertilization strategy as well as their reproductive ecology. Currently, there is a lack of knowledge about how long sea bass Dicentrarchus labrax eggs can remain viable after being activated in seawater. The objectives of this study were to understand the effects of pre-incubation of fresh and overripe sea bass eggs in seawater and to determine the duration of egg receptivity. Pooled eggs (fresh and overripe) from four females were pre-incubated in seawater for 0 min (control), 0.5 min, 1 min, 3 min, 10 min and 30 min and then fertilized by pooled sperm from four males. The fresh eggs had a higher fertilization success than overripe eggs. Our results revealed a significant effect of... |
| Tipo: Text |
Palavras-chave: Egg longevity; Overripe eggs; Reproductive ecology; Mediterranean sea bass; Dicentrarchus labrax. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00279/39000/37580.pdf |
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| Koven, W; Rosenfeld, H; Fauvel, Christian; Nixon, O; Meiri-ashkenazi, I; Bitan, A; Robles, R; Kotzamanis, Y; Shafran, G; Papaioannou, N. |
| The deliverable (D7.1) of WP7 “Establishment of a Computer Assisted Sperm Analysis (CASA) for the evaluation of grey mullet sperm” has been submitted. Preliminary analyses show that mullet sperm motility pattern is not similar to that of sea bass (Dicentrarchus labrax) or rainbow trout (Oncorhynchus mykiss) in terms of velocity as well as motility duration (ca 1 min; Fig. 1a). Our preliminary results, indicate that the major bio-technical settings, dilution of sperm, quality of activation and mastering of video recordings have been determined and can now be applied to experimental protocols. Since fish sperm quality is usually assessed through subjective observation, in terms of motility classes and duration, statistical analysis becomes less precise. The... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00307/41776/40991.pdf |
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| Colleter, Julie; Penman, David J.; Lallement, Stephane; Fauvel, Christian; Hanebrekke, Tanja; Osvik, Renate D.; Eilertsen, Hans C.; D'Cotta, Helena; Chatain, Beatrice; Peruzzi, Stefano. |
| Androgenesis is a form of uniparental reproduction leading to progenies inheriting only the paternal set of chromosomes. It has been achieved with variable success in a number of freshwater species and can be attained by artificial fertilization of genetically inactivated eggs following exposure to gamma (gamma), X-ray or UV irradiation (haploid androgenesis) and by restoration of diploidy by suppression of mitosis using a pressure or thermal shock. The conditions for the genetic inactivation of the maternal genome in the European sea bass (Dicentrarchus labrax L.) were explored using different combinations of UV irradiation levels and durations. UV treatments significantly affected embryo survival and generated a wide range of developmental abnormalities.... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00239/34996/33531.pdf |
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| Omnes, Marie-helene; Severe, Armelle; Barone, Herve; Suquet, Marc; Buchet, Vincent; Le Roux, Annick; Gaignon, Jean-louis; Fostier, Alexis; Fauvel, Christian. |
| The pollack Pollachius pollachius is a commercially important fish, considered as a candidate for aquaculture in France. Rearing attempts are promising (Suquet et al., 1996), and more information is required about its reproduction, to contribute to a better management of breeders for this species. This study was designed to examine the first maturity in pollack and the effects of conditions such as origin and delayed reproduction season, on gonad maturation, reproductive and growth performances of adults. |
| Tipo: Text |
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| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00002/11324/7861.pdf |
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| Peruzzi, Stefano; Varsamos, Stamatis; Chatain, Beatrice; Fauvel, Christian; Menu, Bruno; Falguiere, Jean-claude; Severe, Armelle; Flik, Gert. |
| The purpose of this study was to determine whether diploid and triploid sea bass differed in terms of main haematological and physiological characteristics. Diploid and triploid fish were produced by sub-optimal pressure treatments and held in communal environments under standard rearing conditions. Total red blood cell count (RBCC), haemoglobin concentration (Hb), hematocrit (Hct), mean cell volume (MCV), mean cellular haemoglobin content (MCH), mean cell haemoglobin concentration (MCHC), plasma metabolites, osmotic pressure, gill Na+/K+-ATPase activity, electrolytes, cortisol, and 3,5,3'-triiodo-L-thyronine (T-3) were measured and compared. Triploidisation in sea bass led to an increase in erythrocyte size (32% in cytoplasm surface area, and 50% in... |
| Tipo: Text |
Palavras-chave: Dicentrarchus labrax; Sea bass; Triploid; Diploid; Physiology; Haematology. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/2005/publication-508.pdf |
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| Schiavone, R; Zilli, L; Vilella, S; Fauvel, Christian. |
| The aims of the present study were (a) to compare sperm quality (percentage of motile spermatozoa, motility duration, density and fertility after cryopreservation) between precocious and normally maturing male European sea bass Dicentrarchus labrax, (b) to examine the potential of human chorionic gonadotropin (hCG) to increase spermiation in precocious males and (c) to examine the potential of hCG to induce spermatogenesis and spermiation in non-precocious 1-year-old males. One hundred precocious and 100 non-precocious fish were each randomly divided in two groups each: control (precocious saline-treated and non precocious saline-treated) and treated (precocious hCG-treated and non precocious hCG-treated). Treated groups were administered weekly with 1000... |
| Tipo: Text |
Palavras-chave: Dicentrarchus labrax; HCG; European sea bass; Spermiation; Spermatogenesis. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1815.pdf |
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| Fauvel, Christian; Boryshpolets, Sergey; Cosson, J.; Leedy, J. G. Wilson; Labbe, C.; Haffray, Pierrick; Suquet, Marc. |
| The sperm of seabass is very fragile and it quickly loses its ability to fertilize after collection either if kept undiluted or in classic saline media. In order to avoid cryopreservation when only short conservation is required, the process of sperm management including sperm collection, sperm dilution rate in storage medium and storage medium composition, was subject to experimental trials. A concentration of 20% urine generated a low pH of seminal fluid, and it immediately altered the motility ability. However, pH did not seem to be the key agent of motility prevention since sperm dilution in Leibovitz culture medium (L15) or in classic saline medium both presenting a similar low pH (7.3) did not affect motility. L15 increased the duration of sperm... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00111/22221/20066.pdf |
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| Suquet, Marc; Fauvel, Christian; Gaignon, Jean-louis. |
| The term "domestication" has a legislative meaning when it applies to species submitted to selection pressures, but also a literary one, according to the time since which the species live closed to men and the possibility of controlling their reproduction. In terms of legislation, none of both species of gadids object of this article, cod and pollack, can be considered as domestic. From a literary point of view, 140 years of research and the control of the reproduction, give to the cod a domestic status. It is not the case with pollack, only studied since ten years and the reproduction of which is still badly controlled. The weak differences observed between the performances of breeding and wild cods focuse the still limited impact of the domestication on... |
| Tipo: Text |
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| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00272/38282/36471.pdf |
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| Fauvel, Christian; Suquet, Marc. |
| Bluefin tuna shows adaptative physiology features allowing life in a wide range of physical and climatic parameters like temperature, salinity and hydrostatic pressure, hence the species fulfil the main basic requirements for progressive domestication and rearing in captivity. The high mortalities recorded after handling and the losses observed after abrupt variations of environment in the cages, emphasised the extreme sensitivity to stress of tuna. As consequences, the progresses about the control of tuna biological cycle are very slow due to limited handling possibilities and tuna aquaculture is restricted to fattening of wild fish. At this time, bluefin tuna production progresses without domestication of the species. |
| Tipo: Text |
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| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00272/38283/36473.pdf |
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| Suquet, Marc; Cosson, J.; Donval, Anne; Labbe, C.; Boulais, Myrina; Haffray, Pierrick; Bernard, Ismael; Fauvel, Christian. |
| This work assesses the present knowledge on Pacific oyster sperm biology in comparison to two marine fish species (turbot and seabass) whose sperm characteristics are well described. Sperm morphology mainly differs by the presence of an acrosome in Pacific oyster which is absent in both fish species. In turbot as in Pacific oyster, a sperm maturation process along the genital tract is observed. Sperm motility is triggered by changes in osmolality for seabass and turbot and in pH for Pacific oyster. However, complementary factors are involved to maintain sperm immotile in the genital tract. Sperm movement duration is very long in Pacific oyster (2024 h), compared to turbot (35 min) and seabass (4050 s). A high capacity of ATP regeneration is observed in... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00111/22220/20059.pdf |
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| Cosson, J; Groison, A; Suquet, Marc; Fauvel, Christian; Dreanno, Catherine; Billard, R. |
| After along period of spermatogenesis (several weeks to months), marine fish spermatozoa are delivered at male spawning in seawater (SW) at the same time as ova. In some fish species, as the ova micropyle closes quickly after release, these minute unicells, the spermatozoa, have to accomplish their task of reaching the micropyle within a very brief period (several seconds to minutes), for delivery of the haploid male genetic information to the ova. To achieve this goal, their high-performance motile equipment, the flagellum, must fully activate immediately on contact with the SW and then propel the sperm cell at an unusually high initial velocity. The cost of such 'hyperactivity' is a very rapid consumption of intracellular ATP that outstrips the supply.... |
| Tipo: Text |
Palavras-chave: Cell activation; Osmolality; Ions; Cell energetics; Motility; Spermatozoon; Marine fish. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6967.pdf |
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| Cosson, Jacky; Groison, Anne-laure; Suquet, Marc; Fauvel, Christian. |
| As in many marine fish, motility is triggered by osmotic pressure (OP) in cod and hake spermatozoa and motility ranges several minutes with a high velocity (above 50 mu m/s) period restricted to 100 s. A decrease in the flagellar beat frequency (BF) is partly responsible of this briefness. Detailed observations of the flagella during the motility period showed: 1) sea water provokes OP damages (blebs) which impair the correct wave propagation 2) waves become restricted to the proximal flagellum and tip becomes devoid of wave 3) the wave amplitude decreases. The combination of these factors drastically limits to the earliest period of motility the ability for spermatozoa to efficiently progress towards egg for fertilization. |
| Tipo: Text |
Palavras-chave: Osmotic pressure; Sperm motility; Spermatozoa; Hake; Cod. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6552.pdf |
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| Desvignes, Thomas; Pontarotti, Pierre; Fauvel, Christian; Bobe, Julien. |
| Background: The Nme family, previously known as Nm23 or NDPK, is involved in various molecular processes including tumor metastasis and some members of the family, but not all, exhibit a Nucleoside Diphosphate Kinase (NDPK) activity. Ten genes are known in humans, in which some members have been extensively studied. In non-mammalian species, the Nme protein family has received, in contrast, far less attention. The picture of the vertebrate Nme family remains thus incomplete and orthology relationships with mammalian counterparts were only partially characterized. The present study therefore aimed at characterizing the Nme gene repertoire in vertebrates with special interest for teleosts, and providing a comprehensive overview of the Nme gene family... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6947.pdf |
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| Registros recuperados: 63 | |
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