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| Registros recuperados: 672 | |
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| Perodou, Dominique; Latrouite, Daniel. |
| La perspective de reconstituer des gisements de pétoncle ou de pratiquer une aquaculture extensive nous a conduits à réaliser en baie de Quiberon des expériences de captage de naissain. Des observations sur la reproduction ont été faites à cette occasion. La période d'activité gonadique s'étend de Mars à Septembre mais la ponte principale intervient au début du mois de juin ; elle ne se concrétise par un bon taux de fixation que si la température de l'eau est au moins égale à 16°C. Des pontes secondaires sont observées jusqu'en Août - Septembre. Cette espèce est hermaphrodite est la relation entre le sex-ratio et la taille conduit à suggérer que la création de réserves provisoires sur un gisement exploité serait de nature à améliorer le potentiel... |
| Tipo: Text |
Palavras-chave: Pétoncle noir; Chlamys varia; Reproduction; Captage; Baie de Quiberon. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00021/13260/10307.pdf |
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| Gerard, Andre; Naciri-graven, Yamama; Boudry, Pierre; Launey, Sophie; Heurtebise, Serge; Ledu, Christophe; Phelipot, Pascal. |
| At the end of the 1980s, after two decades of aquaculture research in molluscs, Ifremer initiated its first genetic studies. These new studies quickly revealed the limits of knowledge in aquaculture, particularly in terms of controlling oyster reproduction. This presentation attempts to summarize the available information on genetics in aquaculture. In particular, breeding practices in the 1980s involved populations of broodstock, while genetics requires modern techniques where individuals, not just populations, can be identified. Controlling reproduction at the individual level in oysters raises new questions that existing protocols cannot address, especially in terms of controlling sex determination, individual maturity, spawning synchrony, chemical... |
| Tipo: Text |
Palavras-chave: Gamètes; Fécondation; Induction ponte; Reproducteur; Conditionnement; Gamétogénèse; Génétique; Reproduction; Crassostrea gigas; Huîtres. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/acte-3210.pdf |
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| Moura,Rafael de; Caldara,Fabiana Ribeiro; Foppa,Luciana; Machado,Simone Pereira; Nääs,Irenilza de Alencar; Garcia,Rodrigo Garófallo; Gonçalves,Liliane Maria Piano. |
| ABSTRACT This study aimed to assess the prevalence and influence of urinary tract infection on the reproductive performance of sows. The animals underwent urine tests using reagent strips and diagnosed as positive or negative. They were then divided into two groups of 30 positive and 30 negative sows for urinary tract infection. Each sow was considered an experimental unit and was followed from labor to weaning. The animals were assessed for their reproductive performance (labor duration, number of live births, mummified piglets, and stillbirths, and postpartum diseases). After weaning, the weaning-estrus interval and rate of return to estrus were assessed. A thermographic camera was used to identify hyperthermia of the mammary system and its relation with... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Animal health; Cystitis; Mortality; Pigs; Reproduction. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100410 |
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| CHAVES,MARCIO F.; TENÓRIO,FERNANDA C.M.A.; SANTOS,IGOR L.V.L.; J.C.L. NETO,CLOVIS; TEXEIRA,VALERIA W.; MOURA,GERALDO J.B.; TEXEIRA,ÁLVARO A.C.. |
| ABSTRACT The objective of this study was to assess variations of the condition factor (K1) in relation to the gonadosomatic- RGS and energy reserves (hepatosomatic - RWL and liposomatic - RFB relations) of Leptodactylus macrosternum and their relationship to climate variation in the Northeast of Brazil, Caatinga area, state of Paraiba. The animals were captured fortnightly through active collecting, between January and December 2013. Significant differences were observed in the monthly variations of K1, RGS and RFB indices in male and female L. macrosternum over the months of collection. In males, K1 showed no significant relationship with the other variables. In females, RGS values only show notable correlations with RWF and K1 values. K1 values showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anurans; Fatty bodies; Northeast; Reproduction; Seasonality. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401591 |
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| Deslous Paoli, Jean-marc. |
| Des prélèvements dans le bassin de Marennes-Oléron ont permis de localiser les fortes charges de Crepidula fornicata L. principalement dans le centre du bassin (le long du banc de Charret et dans le courant d'Oléron). En ces deux points la charge fraîche cumulée a été estimée à environ 2 700 tonnes. La structure de population fait apparaître une croissance moyenne de 20, 19, 17 et 12 millimètres respectivement pour les 1ère, 2ème, 3ème et 4ème années avec une variabilité très importante dès la première année. 74,5% des animaux constituent des chaines primaires d'en moyenne six individus fixés sur des coquilles de crépidules mortes. La période de reproduction s'étale vraisemblablement du mois d'avril au mois de septembre et 25% des individus portent des... |
| Tipo: Text |
Palavras-chave: Crepidula fornicata; Population; Croissance; Reproduction; Marennes Oléron. |
| Ano: 1982 |
URL: http://archimer.ifremer.fr/doc/00092/20356/18017.pdf |
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| Leite,Fosca Pedini Pereira. |
| The post-marsupial growth, sexual differentiation, fecundity and reproductive biology of Hyale media Dana, 1853 living on Sargassum cymosum C. Agardh, 1820 are described. The growth was continuous througth 12 stages for males and 9 for females. The sexual differentiation occours at 2th or 3th moult and was demonstrated by the enlargment of the gnatopod II propod. Number of eggs increased with the female head length. Observations of courtship behavior, incubation, moult processes, emergence of juveniles and brood caracteristics were made. The precopula courtship continued for two days, the eggs were incubated for six days and the juveniles, that stay until three days in the marsupium, moult every day. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphipods; Reproduction; Growth; Fecundity; Sargassum. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000300008 |
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| SANCHES,EDUARDO G.; OLIVEIRA,IDILI R.; SERRALHEIRO,PEDRO C. DA SILVA; CERQUEIRA,VINICIUS R.. |
| This study aimed to develop a protocol of semen cryopreservation of the mutton snapper Lutjanus analis. The interaction between three extenders ( pH 6.1; 7.8 and 8.2) , two concentrations of dimethyl sulfoxide ( DMSO, 5 and 10%) and three cooling rates ( -90; -60 and -30°C.min−1) on the sperm motility rate and motility time were analyzed by a factorial experiment. A sample of 30 fishes ( 1,261 ± 449 g) collected in the nature was kept in floating net cages. The semen was frozen by using cryogenic straws, in nitrogen vapour and transferred, later, to liquid nitrogen. Fertilization test was accomplished to evaluate the viability of the cryopreserved sperm. The highest sperm motility rate and motility time ( P < 0.05) was achieved by combining extender C (... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cryoprotector; Extender; Lutjanus analis; Reproduction; Sperm. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301083 |
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| Goulletquer, Philippe. |
| Since its introduction to French coasts in the 1970s, Crassostrea gigas completes its reproductive cyclei.e. regular annual recruitment and establishment of natural populationsin only two sectors (Charentes coast and Arcachon Bay). In other areas of Pacific oyster production (Normandy, Brittany, Vendée, Mediterranean), complete gametogenesis may occur, resulting in spawning events and even recruitment in favourable temperatures. Temperature seems to be the main limiting factor for in situ reproduction. Growth and reproduction occur simultaneously. The study of the reproductive cycle of one-year old oysters showed that gametogenesis was asynchronous with high interannual variability and growth appeared to take precedence over reproduction. On the... |
| Tipo: Text |
Palavras-chave: Physiologie; Facteurs environnementaux; Cycle; Reproduction; Crassotrea gigas; Huîtres. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/acte-3209.pdf |
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| Matthews-Cascon,Helena; Rocha-Barreira,Cristina de Almeida; Meirelles,Carlos; Bigatti,Gregorio; Penchaszadeh,Pablo. |
| Turbinella laevigata is found since the intertidal zone up to 40 m depth, being endemic of Brazil where it occurs from the state of Amapá to the state of Espirito Santo. The objective of this study was to describe the ootheca of this species. Fifteen samples collected in the Olho d'Água Beach, City of Icapuí and Fleixeiras Beach, City of Trairí, both in Ceará State, Northeast Brazil, were studied. The spawns were composed by 15 +/- 1.4 SD capsules and had 63 +/- 6.4 SD mm of length with 41 +/- 2.5 SD mm of width. They had a convex and a concave surface, and plaited edges that drew out until the basal membrane, to which they joined forming a medial ridge. This species apparently produced a high amount of nurse eggs. The early juveniles measured 6.4 +/- 0.7... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproduction; Mollusca; Turbinellidae. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200013 |
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| MATTOS,Douglas da Cruz; SCRENCI-RIBEIRO,Rafaela; CARDOSO,Leonardo Demier; JUNIOR,Manuel Vazquez Vidal. |
| ABSTRACT The blue discus (Symphysodon aequifasciatus) is often sold for ornamental purposes. It is a neotropical cichlid from South America, which is native to the rivers of the Amazon basin of Brazil, Peru and Colombia. The purpose of this study was to characterize the reproductive behavior of S. aequifasciatus and identify features that can later be used by breeders to facilitate the handling and reproduction of this species in captivity. The experiment was divided into two stages: the first dealt with partner selection and couple formation to observe the behaviors of territoriality, pursuing, fleeing, biting, stay, protecting and cleaning of the substrate. The second stage documented mating behavior, nesting and parental care, to observe vibration,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonian Fish; Ornamental Fish; Larviculture; Reproduction; Behavior. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400433 |
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| Registros recuperados: 672 | |
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