Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 61
Primeira ... 1234 ... Última
Imagem não selecionada

Imprime registro no formato completo
Acoustical monitoring of fish density, behavior, and growth rate in a tank ArchiMer
Conti, Stéphane; Roux, Philippe; Fauvel, Christian; Maurer, Benjamin; Demer, David.
A challenge for the aquaculture community has long been the development of harmless techniques for monitoring fish in a tank. Acoustic telemetry has been used to monitor fish swimming behavior, and passive acoustics have been used to monitor fish feeding, but new techniques are needed to monitor non-invasively their numbers and growth rates. Recently, it has been demonstrated that the acoustical total scattering cross section of fish swimming in a tank can be measured from multiple reverberation time series. These measurements have been used successfully to estimate the number of fish in a tank in laboratory conditions, and to characterize their acoustical signatures. Here, we introduce a novel method for acoustically monitoring fish numerical density and...
Tipo: Text Palavras-chave: Total scattering cross section; Fish counting; Growth rate; Remote monitoring; Fish behavior.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1121.pdf
Imagem não selecionada

Imprime registro no formato completo
Actividad tripsina y quimotripsina como indicadores de condición larvaria: estudio de restricción alimentaria y calidad de puesta ArchiMer
Cara, Beatriz; Moyano, Javier; Zambonino, Jose Luiz; Fauvel, Christian.
Tipo: Text
Ano: 2004 URL: http://archimer.ifremer.fr/doc/00134/24527/22558.pdf
Imagem não selecionada

Imprime registro no formato completo
Analysis of turbot (Scophthalmus maximus) broodstock pilot scale production. ArchiMer
Omnes, Marie-helene; Normant, Yvon; Suquet, Marc; Fauvel, Christian.
Rearing turbot (Scophthalmus maximus) reaches the commercial scale. With the hatchery output increasing, more attention needs to be focussed on broodstocks performance both in terms of quantity and viability of eggs. The techniques of shifting the environmental conditions allow a production of eggs all year round. However, egg quality tends to be highly variable. This paper examines over a two-year period, the improvement in egg quality and its consequences on the production of larvae by a strict management of spawners.
Tipo: Text
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00169/28061/29430.pdf
Imagem não selecionada

Imprime registro no formato completo
Body reserves mediate trade-offs between life-history traits: new insights from small pelagic fish reproduction ArchiMer
Brosset, Pablo; Lloret, Josep; Munoz, Marta; Fauvel, Christian; Van Beveren, Elisabeth; Marques, Virginie; Fromentin, Jean-marc; Menard, Frederic; Saraux, Claire.
Limited resources in the environment prevent individuals from simultaneously maximizing all life-history traits, resulting in trade-offs. In particular, the cost of reproduction is well known to negatively affect energy investment in growth and maintenance. Here, we investigated these trade-offs during contrasting periods of high versus low fish size and body condition (before/after 2008) in the Gulf of Lions. Female reproductive allocation and performance in anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) were examined based on morphometric historical data from the 1970s and from 2003 to 2015. Additionally, potential maternal effects on egg quantity and quality were examined in 2014/2015. After 2008, the gonadosomatic index increased for...
Tipo: Text Palavras-chave: Maternal effect; Northwest Mediterranean; Anchovy; Sardine.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00353/46458/46233.pdf
Imagem não selecionada

Imprime registro no formato completo
Changes in Atlantic cod (Gadus morhua L.) sperm quality during the spawning season ArchiMer
Rouxel, Catherine; Suquet, Marc; Cosson, J; Severe, Armelle; Quemener, Loic; Fauvel, Christian.
The biology of cod reproduction is well described in the scientific literature. However, sperm biology and spermatozoa management are poorly studied in this species. Because of its recent farming expansion, a better knowledge of cod gametes is becoming especially useful. This work aimed at establishing tools to study sperm biology in cod, and also investigated the existence of changes in cod sperm quality during the spawning period. We showed that sperm concentration could be assessed using spectrophotometry at 260 nm. Sperm motility significantly decreased after a 168-h storage at 4 degrees C. A 1:9 dilution of sperm in a non-activating medium (1/3 seawater and 2/3 freshwater, osmotic pressure: 360 mOsm kg(-1)) improved sperm storage. Sperm concentration,...
Tipo: Text Palavras-chave: Spermatozoa; Quality; Ageing; Sperm; Cod; Gadus morhua.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-3829.pdf
Imagem não selecionada

Imprime registro no formato completo
Characterization of sperm motility in sea bass: the effect of heavy metals and physicochemical variables on sperm motility ArchiMer
Abascal, F; Cosson, J; Fauvel, Christian.
Computer assisted sperm analysis (CASA) was used to characterize the motility of sea bass Dicentrarchus labrax spermatozoa and to study the effect of several physicochemical variables and heavy metals on sperm swimming performance. Duration of sperm motility in sea bass was very short (< 50 s). During the first 20 s all the motility variables measured remained approximately constant, the velocity and linearity of the movement being maximum during this period, while both variables decreased sharply later. While slight variations in pH did not significantly modify sperm swimming performance, changes in osmolality affected all the measured motility variables. Two of the heavy metals tested, Cu2+ and Pb2+, did not affect sperm motility when the activating...
Tipo: Text Palavras-chave: Sperm; Heavy metals; Dicentrarchus labrax; CASA.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-4765.pdf
Imagem não selecionada

Imprime registro no formato completo
Cod (Gadus morhua) rearing attempts in France ArchiMer
Suquet, Marc; Omnes, Marie-helene; Normant, Yvon; Petton, Bruno; Severe, Armelle; Fauvel, Christian; Barone, Herve; Quemener, Loic; Buchet, Vincent; Pasco, Laurent; Menard, E; Gaignon, Jean-louis.
Because of its rapid growth, its good reputation and the promising aquaculture experiences conducted in Norway and Scotland, cod is considered as a good candidate for cold water aquaculture. The aim of this paper is to present the work carried out in France since 1999: the selection of cod as a promising candidate for aquaculture and the assessment of its rearing performances in this environment.
Tipo: Text
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00170/28142/26362.pdf
Imagem não selecionada

Imprime registro no formato completo
Comparative analysis of male germ cell proliferation and apoptosis in wild and captive Atlantic bluefin tuna (Thunnus thynnus L.) ArchiMer
Zupa, R.; Fauvel, Christian; Mylonas, C. C.; Santamaria, N.; Valentini, L.; Pousis, C.; Papadaki, M.; Suquet, Marc; De La Gandara, F.; Bello, G.; Metrio, G.; Corriero, A..
The most commonly observed reproductive dysfunction in male fishes reared in captivity is reduction in sperm volume and quality. The Atlantic bluefin tuna Thunnus thynnus (Osteichthyes: Scombridae) is one of the few large pelagic and migratory marine fishes maintained in captivity with the purpose of establishing breeding populations to support an aquaculture industry. The objectives of the present study were to compare male germ cell proliferation and apoptosis between wild and captive individuals at two different phases of the spermatogenetic cycle, and to evaluate sperm motility characteristics of captive individuals. Histological observations were performed to analyze testicular activity, and germ cell proliferation and apoptosis were evaluated through...
Tipo: Text
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00125/23579/25462.pdf
Imagem não selecionada

Imprime registro no formato completo
Compte rendu des premières expérimentations de fécondation artificielle chez l'ombrine, Sciaenops ocellatus : études préliminaires de la maturation finale des ovocytes et de la qualité du sperme ArchiMer
Gardes, Lionel; Buchet, Vincent; Villanove, Philippe; Fauvel, Christian.
Artificial insemination mastery in red drum, Sciaenops ocellatus, requires a first experimental step wOOng at getting basic biological data. Regarding males, a relation between optical density of the solution (OD) measured by spectrophotometry and sperm concentration (SC) has been established : OD O,161*SC + 0,119. Mean sperm concentration measured is 4,36.10 10 spz.mL-1. This study shows an influence of the solution of dilution on spermatozoa motility and its evolution during short term preservation. As far as females are concemed, the follow-up of final maturation through the observation of samples taken during reguIar strippings, seems to he a good technique to limit overripening and spontaneous liheration of ovules. Some artificial insemination trials...
Tipo: Text Palavras-chave: Fécondation artificielle; Concentration spermatique; Motilité du sperme; Ovogenèse; Ovulation; Sur maturation; Ombrine; Sciaenops ocellatus.; Artificial insemination; Sperm concentration; Sperm motility; Oogenesis; Ovulation; Overripening; Red drum.; Sciaenops ocella/us.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00366/47755/47801.pdf
Imagem não selecionada

Imprime registro no formato completo
Cryopreservation of sea bass (Dicentrarchus labrax) spermatozoa in experimental and production simulating conditions ArchiMer
Fauvel, Christian; Suquet, Marc; Dreanno, Catherine; Zonno, Vincenzo; Menu, Bruno.
A sperm cryopreservation protocol adapted from turbot, was tested on sea bass using either 250-mu L straws or 1.5-mL cryovials. A dilution to 1/3 in Mounib's extender and a cooling rate of 65 degrees C.min(-1) allowed frozen sperm to recover an initial motility similar to that of fresh sperm at thawing; however, significant differences in motility (P < 0.001, n = 10 fish semen) were observed at further post-activation times, the motility decrease being faster in thawed sperm. At the experimental scale, triplicate inseminations of 2-mL aliquots (approximately 2 000 eggs) showed a significant fertility decay of thawed sperm compared to that of fresh sperm (P < 0.01, n = 12 fish semen) when a discriminating 35.10(3) spermatozoa to egg ratio was applied....
Tipo: Text Palavras-chave: Dicentrarchus labrax; Sea bass; Cryobank; Insemination; Spermatozoa; Cryopreservation; Dicentrarchus labrax; Loup; Banque de sperme; Insémination; Cryoconservation; Cryoconservation.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-866.pdf
Imagem não selecionada

Imprime registro no formato completo
Cryopreservation of sperm in marine fish ArchiMer
Suquet, Marc; Dreanno, Catherine; Fauvel, Christian; Cosson, J; Billard, R.
Since the first work of Blaxter in 1953, fish sperm cryopreservation has been attempted on about 30 marine species. The present paper reviews the techniques used and the results published in these species. Particular attention is paid to the handling procedure of sperm before freezing, the problems of semen ageing and semen contamination with urine. The quality of frozen-thawed semen was evaluated using previously standardized biotests, such as a two-step motility activation technique adapted for the different species and fertilization assays using a discriminating insemination technique. Most extenders used in marine fish are saline or sugar solutions. From the investigated cryoprotectants, dimethyl sulphoxide (DMSO) generally leads to the best results....
Tipo: Text Palavras-chave: DMSO; Insemination; Fertilization; Cryopreservation; Fish sperm.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-611.pdf
Imagem não selecionada

Imprime registro no formato completo
Description of hake (Merlucius merlucius) spermatozoa: flagellar wave characteristics and motility parameters in various situations ArchiMer
Cosson, J.; Groison,; Fauvel, Christian; Suquet, Marc.
P>The objective of this study was to complement published hake (Merlucius merlucius) sperm motility characteristics by obtention of data more specifically dependent on flagella: beat frequency, flagellar wave amplitude, wave length, number of waves along the length of the flagellum and curvature of the wave. The changes of these parameters are described in relation to the time period elapsed since activation are described using high resolution video images of flagella while quantifying the progression during the swimming period from the activity initiation to full cessation of movement several minutes later. The main characteristic of the swimming period of hake spermatozoa shows a progressive decrease of forward displacement resulting from a cumulative...
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00015/12643/9586.pdf
Imagem não selecionada

Imprime registro no formato completo
Diversify: results from the first year of wreckfish (Polyprion americanus) culture ArchiMer
Peleteiro, J.b.; Linares, F; Vilar, A; Fauvel, Christian; Duncan, N; Rodriguez, C; Izquierdo, M; Mylonas, C.
Tipo: Text
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00307/41772/40987.pdf
Imagem não selecionada

Imprime registro no formato completo
Effect of age and environmental conditions on the movement characteristics of Pacific oyster (Crassostrea gigas) trochophores ArchiMer
Suquet, Marc; Rimond, Flore; Cosson, J.; Wilson-leedy, J.; Lebrun, Luc; Queau, Isabelle; Mingant, Christian; Fauvel, Christian.
The movement characteristics of Pacific oyster trochophores have received very little coverage in the scientific literature. Described here are not only changes in the swimming characteristics of Crassostrea gigas trochophores (size: 53-77 mu m) in relation to time after fertilization and to inter-female variation but also the effects of salinity and pH on movement characteristics. The percentage of motile trochophores was measured on images obtained through a dissecting microscope and the Velocity Average Path (VAP) was assessed using a Computer Assisted Sperm Analysis (CASA) system. At 20 degrees C, the first movements of the trochophores were observed at 6.5 h post-fertilization. The mean (+/- SD) percentage of swimming trochophores and the VAP observed...
Tipo: Text
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00157/26786/24940.pdf
Imagem não selecionada

Imprime registro no formato completo
Effect of stripping frequency on turbot spawn quality. ArchiMer
Fauvel, Christian; Omnes, Marie-helene; Suquet, Marc; Normant, Yvon.
In production operations the application of daily examination of each female of broodstock should be a determinant progress in hatchery management in terms of fry output. The eggs expelled shortly after ovulation by means of a systematic fivefold a week stripping attempt of females, presented a high viability rate (72%) compared to that of eggs collected twice a week (46%) whereas the treatments did not have any effect on female fecundity. Increase of the stripping rhythm brought the hatching rates and broodstock fertilities respectively from 11% to 35% and from 20,000 to 65,000 larvae/kg of spawning female. The enhancement of egg quality and of the resulting larva production is discussed.
Tipo: Text
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00170/28129/26346.pdf
Imagem não selecionada

Imprime registro no formato completo
Effect of water temperature on individual reproductive activity of pollack (Pollachius pollachius) ArchiMer
Suquet, Marc; Normant, Yvon; Gaignon, Jean-louis; Quemener, Loic; Fauvel, Christian.
The effects of water temperature on pollack (Pollachius pollachius) spawning features were individually assessed. During the spawning period, nine fish sets, each composed of one female and two males (mean body weight: 2.5+/-1.0 kg), were placed in small-volume tanks (2 m(3)). Fish sets were held at 8, 10, or 12 degreesC (n=3 for each temperature). Three females released eggs at 8 and 10 degreesC, while only two spawned at 12 degreesC. One hundred thirty-one individual spawns were collected from the eight spawning fish sets. The number of spawns collected per female was significantly lower at 12 degreesC (3.0+/-3.6), compared to 10 degreesC (17.3+/-10.1) and 8 degreesC (23.3+/-2.5). Egg number (eggs kg(-1) BW) was significantly lowered at 12 degreesC...
Tipo: Text Palavras-chave: Egg quality; Temperature; Reproduction; Pollachius pollachius; Pollack; Gadoids.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-470.pdf
Imagem não selecionada

Imprime registro no formato completo
Egg production in the turbot (Scophthalmus maximus) in relation to broodstock management ArchiMer
Omnes, Marie-helene; Normant, Yvon; Suquet, Marc; Fauvel, Christian.
Egg production data from individual hand stripped female turbot were collected and analysed over several consecutive spawning seasons, on natural or shifted conditions. Egg quantity, egg viability and number of spawns were examined from one spawning season to the other, and inside the spawning season. These parameters seemed to increase from a year to the next one, except for the oldest fishes. Spawns were spread over a three-month period and occurred at the same time in the period in successive seasons for most females. Egg production seemed related to the feeding level and the earliness of spawning season appeared depended on the growth rate. Without sand substrate in tanks, injuries could increase therefore no significant differences were observed in...
Tipo: Text
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00199/31018/29423.pdf
Imagem não selecionada

Imprime registro no formato completo
Egg quality in domesticated and wild seabass (D. labrax): a proteomic analysis ArchiMer
Crespel, Amelie; Rime, Hélène; Fraboulet, Erwann; Bobe, Julien; Fauvel, Christian.
Tipo: Text
Ano: 2007 URL: http://archimer.ifremer.fr/doc/00346/45751/45393.pdf
Imagem não selecionada

Imprime registro no formato completo
Egg quality in domesticated and wild seabass (Dicentrarchus labrax): A proteomic analysis ArchiMer
Crespel, Amlie; Rime, Helene; Fraboulet, Erwann; Bobe, Julien; Fauvel, Christian.
In order to improve Our understanding of factors determining egg quality in fish, seabass egg batches obtained from 34 females held under standard conditions, were assessed for biological performances and a fraction from each batch was subjected to proteomic analysis. Comparison of proteomic patterns from eggs of different quality revealed differential protein spots among which one was identified as Nucleoside Diphosphate Kinase, a highly conserved protein involved in cell proliferation. This study shows that molecular markers may help understand factors determining egg quality in fish.
Tipo: Text Palavras-chave: Seabass; NDK; Egg quality; Proteome.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6555.pdf
Imagem não selecionada

Imprime registro no formato completo
Evaluation of fish sperm quality ArchiMer
Fauvel, Christian; Suquet, Marc; Cosson, J..
P>The development of cheaper technical tools and the availability of well established assay kits provide today the spermatologists with several devices for objective and quantifying assessment of sperm quality. The present paper reviews modern methods on sperm concentration assessment, morphometry, motility processes through flagellum studies, motility objective assessment by computer assisted sperm analysis (CASA), sperm integrity and energetic state measurements.
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00015/12642/13921.pdf
Registros recuperados: 61
Primeira ... 1234 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional