Dissertations / Theses on the topic 'Reproduction (biologie)'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Reproduction (biologie).'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Hanot, Olivier. "La cryobiologie appliquée en biologie de la reproduction." Montpellier 1, 1991. http://www.theses.fr/1991MON11200.
Hostache, Gérard. "Biologie de la Reproduction de l'Atipa Hoplosternum littorale (Teleostei, Siluriforme, Callichthyidae)." Rennes 1, 1994. http://www.theses.fr/1994REN10179.
Laaka-Lindberg, Sanna. "Ecology of asexual reproduction in hepatics /." Helsinki : Yliopistopaino, 2000. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/laaka-lindberg.
Maze, Corinne. "Construction de l'interface : sujet humain-espece humaine. a propos de la representation du role de la biologie dans la perpetuation de l'espece." Paris 10, 1997. http://www.theses.fr/1997PA100123.
The single paradigm of this research refers itself to the inherent risk of some breaking off in human being natural development (artificial insemination, pollution, genetic manipulation). In any case and in the two different possible orders, the subjects who answered the questionnaire had to assess the risks for the child to be born and for the + species to be ; long dated. In the first experimentation, the + species to be ; is seen as running more risks than the individual to be born and the risks run by individual to be born are seen as greater when the risks run by +the + species ; have been previously assessed (the reverse is not true). In the second experimentation, we try to build up that if we strengthen the representation of biological aspects in species perpetuation (vs non strengthening), this mode is only allusive. In the third experimentation, if we oppose to this strengthening the representation of cultural aspects in species perpetuation, it's in this second case only that we find again the original model. In the fourth experimentation, we confirm that when the subjects answering are females, the representation of biology in the procreation already include some cultural and axiological elements (that is not true when the subjects answering are males)
Angelier, Frédéric. "Age et reproduction chez les oiseaux marins : mécanismes hormonaux impliqués dans les décisions de reproduction." Poitiers, 2006. http://www.theses.fr/2006POIT2328.
Breeding success increases with age in many organisms, but the physiological mechanisms underlying this pattern are poorly known. The aim of this dissertation is to explore the influence of age on hormonal mechanisms involved in the regulation of parental behaviour, allostasis and stress response (corticosterone and prolactin) in seabirds. The use of ongoing long-term mark-recapture programme allowed us to show that age and especially breeding experience influence baseline hormones levels and the sensitivity to stressors. We were able to describe the first hormonal correlates of senescence. We showed the role of corticosterone, which in interaction with body condition, mediates foraging decisions and allocations processes. Our data strongly suggest that variations in baseline corticosterone levels and the ability to maintain a threshold levels of prolactin during a stressful situation may be an important physiological mechanism involved in the improvement of reproductive performance with advancing age. These findings are discussed in the light of current the evolutionary theories addressing the effect of age and experience on reproductive success
Cherasse, Sarah. "Reproduction and immunity in ant queens: Reproduction et immunité chez les reines de fourmis." Doctoral thesis, Universite Libre de Bruxelles, 2019. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/284596.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Capape, Christian. "Les Sélaciens des côtes tunisiennes systématique et biologie de la reproduction, essai de synthèse critique, 1, systématique des pleurotrèmes, 2, systématique des hypotrèmes, 3, biologie de la reproduction." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37596499h.
Capapé, Christian. "Les sélaciens des côtes tunisiennes, systématique et biologie de la reproduction : Essai de synthèse critique : volume 1 : systématique des pleurotrêmes ; volume 2 : systématique des hypotrêmes ; volume 3 : biologie de la reproduction." Montpellier 2, 1986. http://www.theses.fr/1986MON20115.
BEAUJARD, MARIE-PAULE. "Applications theoriques de la cytometrie en flux en biologie de la reproduction." Nantes, 1990. http://www.theses.fr/1990NANT121M.
Vianey-Liaud, Marc. "Biologie de la reproduction de Biomphalaria glabrata (Say, 1818) (Mollusque, Gastéropode, Planorbidae)." Montpellier 2, 1990. http://www.theses.fr/1990MON20245.
Lacoume, Sandrine. "Développement et succès reproducteur des mâles parasitoïdes, Dinarmus basalis, suite à des contraintes environnementales." Tours, 2007. http://www.theses.fr/2007TOUR4009.
Males should protect their sperm stock and fertilization potential. The aim of this thesis is to investigate the effects of different environmental constraints on the reproductive success of males of the hymenoptera parasitoid, Dinarmus basalis. We have chosen a biotic factor (host resource) and an abiotic factor (a cold shock). Our results show that a cold choc on adult males does not affect their reproductive potential. However, a cold shock applied during development reduces males’ emergence but not developmental durations. Similar results are obtained with a dietary constraint applied during male development. This constraint affects also male phenotype by reducing both male and genital tract size. A stress applied during development reduces the quantity of sperm. In single mating, these constraints do not prevent male from mating. However, in repeated mating and male-male competition, constraints applied during development disadvantage males
SAEZ, FABRICE. "Les prostasomes : fonction antioxydante dans le sperme humain (doctorat : biologie de la reproduction)." Clermont-Ferrand 1, 2000. http://www.theses.fr/2000CLF1MM16.
Bariche, Michel. "Biologie et écologie de deux espèces lessepsiennes (Siganus rivulatus et Siganus luridus, Téléostéens Siganidae) sur les côte du Liban." Aix-Marseille 2, 2002. http://www.theses.fr/2002AIX22035.
Loques, Françoise. "Biologie de la phanérogame marine Zostera Noltii Hornemann sur le littoral méditerranéen français." Nice, 1990. http://www.theses.fr/1990NICE4441.
Nunez, Rodriguez Jesus. "Contribution à l'étude de la biologie et de la reproduction de la Sole (Soles vulgaris Quensel 1806) : approche ultrastructurale et physiologique." Bordeaux 1, 1985. http://www.theses.fr/1985BOR10601.
Marty, Regis. "Biologie de la reproduction et du developpement de deux especes d'annelides polychetes nereis diversicolor (o. F. Muller) et perinereis cultrifera grube." Rennes 1, 1997. http://www.theses.fr/1997REN10005.
Colon, Laetitia. "L'hybridogenèse dans le complexe Rana klepton esculenta : apports des marqueurs génétiques." Lyon 1, 2004. http://www.theses.fr/2004LYO10143.
Barthélémy, Roxane-Marie. "Biologie de la reproduction des copépodes calanoi͏̈des : biodiversité morphofonctionnelle et intérêt phylétique des structures génitales femelles : données structurales, ultrastructurales et biochimiques sur les glandes associées." Aix-Marseille 1, 1999. http://www.theses.fr/1999AIX11073.
Boyer, Catherine. "Conceptualisation de la reproduction végétale à l'école primaire." Paris 5, 1998. http://www.theses.fr/1998PA05H001.
This research studies and inquires into the conditions under which the assimilation and construction of scientific knowledge operate for primary school children. For several classes, from first-years infants to second-year primary this developmental study analyses the gradual shift from the everyday situations. It underlines that the inescapable precursor elements of conceptualization-children's initial representations are found to be very distant from scientific concepts and are fraught with very stubborn obstacles. Believed not to be interrelated, these conceptions are mainly expressed at everyday level. Consequently, a break brought about by specific didactic situations is indispensable if a more scientific conception is to be obtained. Questioning, observation and experimentation thus contribute towards this break. In this process the socio-cognitive conflict proves to be crucial and promotes the predominance of scientific operative invariants. The variety of signifiants also plays an important part. As regards accession to a scientific conception, this will come from a development of relationships between the different concepts. However, although the everyday concept is found to be an obstacle, vocabulary also proves to be a source of problems for the young pupil. For any one child one and the same word will awaken different conceptions over time, just as one and the same formulation level out of context will correspond in children's minds to an everyday or scientific conception. It is in fact only by dealing with individual cases, in conjuction with reciprocal relationship, that children's conceptualization can perhaps be understood. The concepts of seed, flower and fruit thus occur in a partial relative order and, if towards the age of 9 conceptualization of vegetable reproduction becomes scientifc, this does not mean that it is yet finalized or stabilized
Kerdal, Zakaria. "Biologie évolutive de la reproduction chez les canidae : recherche appliquée sur le fennec (Fennecus zerda)." Paris, Muséum national d'histoire naturelle, 1996. http://www.theses.fr/1996MNHN0023.
Zhou, He. "Biologie comparée d'écotypes de Trifolium pratense L. : diversité des fonctions de croissance et de reproduction." Dijon, 1992. http://www.theses.fr/1992DIJOS059.
Triki-Teurtroy, Sarah. "Répartition et biologie de la reproduction d'un oeillet en voie de disparition, Dianthus Gratianopolitanus Vill." Paris 11, 2006. http://www.theses.fr/2006PA112327.
Land use often provokes the fragmentation and the reduction in population size of concerned species, consequences which may have major negative effects on genetics, demography or reproduction and therefore on species survival. Dianthus gratianopolitanus Vill. (Caryophyllaceae) is a carnation endemic to Europe. This species has small and scattered populations, growing mainly on calcareous grasslands. This habitat is strongly threatened and has dramatically decreased during the twentieth century. Despite a current distribution that may correspond to that of a glacial relict and a strong fragmentation, genetic differentiation between populations is small, which may indicate a relatively recent fragmentation. Furthermore, genetic diversity is higher than expected for a species with such a fragmented distribution of small populations or in comparison with D. Sylvestris Wulf, which occurs in similar habitat but is far more common. These results may be attributable to the clonal abilities of D. Gratianopolitanus, as observed in Maianthenum bifolium (L. ) Schmidt. Therefore, extinction risk is probably less due to a loss of genetic diversity, even if the probable high selfing rates (revealed by heterozygote deficits) may lead to loss of genetic variation important for adaptability in the long run. Nevertheless, the large population (more than 200 tufts, located at the Chasseron, Switzerland) suffers from pollen limitation, a probable recruitment limitation and a possible genetic load. To confirm this last point, crossings between individuals from different populations are needed
Robles, Hernández Rubén. "Biologie de la reproduction de l’huître américaine Crassostrea virginica (Gmelin, 1791) en conditions naturelles et expérimentales." Brest, 2006. http://www.theses.fr/2006BRES2026.
Considering the previous thing, the present investigation had as objective to contribute to the knowledge of the reproductive Biology of oyster C. Virginica making a study of the gametogénico process evaluating the ovoocitaria stature and the proportion of sexes of the organisms of the systems lagoons of Tamiahua, Vega de Alatorre, Mancha and Alvarado, of the state of Veracruz. In addition to, to evaluate the gonádico development of the oyster (C. Virginica. ) and to determine the space-temporary behavior of the hidrobiológicos parameters in the four systems lagoons and to establish its relation with the reproductive cycle of he himself. The most excellent results of this study show that this organism does not cross by a period of sexual rest, that is to say, exists a continuous production of gametos during all the times of the year (rains, winter and low water). The results of the histológico study and the IC of the samples collected in the collected in the systems lagunares, allowed to observe the months in which massive egg-layings appeared (November in the September to, January in Alvarado, February in Tamiahua and Vega de Alatorre), in addition to four gametogénicos stages (beginning, growth, maturation and degeneration). Which confirms the relation of the index of condition with the histológicas observations, being the organisms that pnesented/displayed mature ovocitos (ready for the egg-laying) those of greater index of condition. The presence of hemafroditas organisms in the systems lagoons of study, indicates a possible reproductive strategy like answer te disturbances of environment at the time of reproduction, which appears in the months of February to March in the four lagoons
Scalone, Romain [Verfasser]. "Evolution of the sexual reproduction in Veronica (Plantaginaceae) : phylogeny, phylogeography and invasion / Romain Scalone." Mainz : Universitätsbibliothek Mainz, 2012. http://d-nb.info/1019668334/34.
Le, Bohec Céline. "Stratégies d'histoire de vie d'un oiseau longévif : Le manchot royal (Aptenodytes Patagonicus)." Université Louis Pasteur (Strasbourg) (1971-2008), 2007. https://publication-theses.unistra.fr/restreint/theses_doctorat/2007/LE_BOHEC_Celine_2007.pdf.
An evaluation of how animals optimize their lifetime reproductive success is a crucial step for defining their life history strategy. We investigated the trade-off between current reproductive effort, and future survival and breeding attempts to test the hypothesis that reproductive costs and individual heterogeneity in quality occur in a population of king penguins (Aptenodytes patagonicus) individually marked with transponders. Our study shows that individuals adopt different strategies to maximize their fitness according to their individual quality, but also in relation to their breeding history. High quality individuals might be able to buffer the impact of environmental stochasticity on reproductive success without jeopardizing their own survival. Therefore, in terms of survival, a late breeding attempt might not be more costly than no breeding attempt for king penguins. Nevertheless, birds might occasionally take reproductive sabbaticals to optimize their residual reproductive value as suggested by the prudent parent hypothesis. In king penguins, high quality individuals do not seem to monopolize central areas of the colony that are presumed to be of high quality (lower predation, flooding, and tick-infestation risk). Conversely, our study highlights the importance of intra-specific aggressiveness for breeding site selection and for seabird colony structuring. Moreover, we found that indices of both large- and local-scale oceanic conditions might provide different information on the influence of the environment on life history traits in an apex predator. While breeding success was found to be negatively influenced by the global SOI (Southern Oscillation Index) and the SST (Sea Surface Temperature) around Crozet, adult king penguin survival was more strongly related to warm SSTs at the marginal ice zone (MIZ) with a 2 year lag. Our study also found that fledglings had the lowest survival probability during the first year at sea, suggesting that individuals of lower quality may disappear from cohorts during this stressful time. High variability in survival between cohorts during this first winter at sea supports the cohort effect hypothesis. The majority of king penguins start to breed at 4-5 years of age and a decrease in survival and recapture between the fourth and fifth winter at sea may be related to the first breeding attempt. We found that pre-fledging body mass influences post-fledging survival and suggest that high body mass may be a handicap for birds when leaving the colony for their first voyage to sea. Finally, age difference in coloured ornament characteristics might signal breeding or social status and thus reduce the rate of agonistic interactions between juveniles and adults. This doctoral thesis allowed us to evaluate some adaptive trade-offs between fitness components defining the life-history strategies of a long-lived seabird
Negroni, Matteo [Verfasser]. "The proximate and ultimate bases of regulation of lifespan and reproduction in ants / Matteo Negroni." Mainz : Universitätsbibliothek Mainz, 2019. http://d-nb.info/1200032500/34.
Sawadogo, Germain. "Contribution à l'étude des conséquences nutritionnelles sub-Sahéliennes sur la biologie du zébu gobra au Sénégal." Toulouse, INPT, 1998. http://www.theses.fr/1998INPT007A.
Bahloul, Karim. "Contribution à la biologie de population des gazelles persanes en Asie centrale." Lyon 1, 2000. http://www.theses.fr/2000LYO10125.
Azandi, Ngnintedem Laura. "Délimitation taxonomique et étude de la biologie de la reproduction du genre africain Cyrtorchis Schltr. (Orchidaceae)." Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/323916.
The genus Cyrtorchis, grouped of 18 angraecoid orchids species endemic to tropical Africa, and was known for its large, white, fragrant flowers with a long spur well suited for studies on reproductive biology. It was also known for its taxonomic delimitation problems, which can be detrimental to the conservation of the species.This PhD thesis aims to address the delimitation problems within the genus at the inter- and intraspecific level using an integrative taxonomic approach and to investigate its reproductive biology.Visual inspection of 1752 specimens, morphometric and phylogenetic analyses was used to clarify the taxonomy within the genus. Visual inspection delineated 27 a priori morphogroups, from which a sample of 171 specimens representing 20 morphogroups was used for morphometric analyses. For phylogenetic reconstructions, 69 specimens representing 21 of the 27 morphogroups were sequenced with six molecular markers. The characterization of flowering patterns and the observation of pollinators were carried out respectively through a three-year shadehouse phenological survey of 494 living specimens representing 15 taxa and a survey of the natural in situ pollination of two taxa in Cameroon. The assessment of factors affecting fruit and viable seed production was carried out in two species of the genus through 448 hand pollination tests for which the effect of pollination system and resource limitation were examined.Morphological approaches allow to distinguish two groups corresponding to the two sections previously identified for the genus Cyrtorchis. Molecular analyses support only the monophyly of on of the sections, Cyrtorchis sect. Cyrtorchis. Eight morphologically defined taxa including three new species are also well supported by morphometric and phylogenetic analyses. The insertion point of the stipites at the rear third of the length of the viscidium appears to be one of the main reproductive characters supporting the monophyly of the genus while other traits (such as the viscidium structure, the shape of the stipites and the lateral lobes of the rostellum) are found to be important criteria for inferring phylogenetic relationships within the genus. Finally this analysis highlights 27 taxa within the genus (including six new taxa to be described), of which 12 taxa, confirmed by morphometric and/or phylogenetic approaches. Flowering of most species at the shadehouse is peaking during the main rainy season (between August and October). However, some sympatric species present non-overlapping flowering periods and an asynchronism of flowering between populations of the same species. Natural pollination is a rare event and difficult to observe in the two studied species. Indeed, the overall pollination/fruiting rate is low (39% of flowers with pollinia removed and 16% of fruits produced in C. okuensis; 31-15% of flowers with pollinia removed and 7-4% of fruits produced in C. letouzeyi) because of the reduced number of pollinators visits. Additionally, both species were found to be pollinated by hawkmoths. Manual pollination tests revealed that cross-pollination appears to be the most efficient pollination system to produce fruits and viable seeds. However, more species will need to be tested to confirm this pattern.The multidisciplinary approaches developed in this work provide a solid basis to define and implement effective conservation strategies for threatened orchid species. To produce a complete taxonomic revision of the genus, a completed phylogeny including the five remaining and the yet unresolved taxa is required. The newly identified taxa should be described and the conservation status assessed for all species recognised in the genus.
Option Biologie des organismes du Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Genau, Anne Christina [Verfasser], and Stefan A. [Akademischer Betreuer] Rensing. "Evolutionary conservation of epigenetic control of plant sexual reproduction / Anne Christina Genau ; Betreuer: Stefan A. Rensing." Marburg : Philipps-Universität Marburg, 2021. http://d-nb.info/122758010X/34.
Garcia-Fernandez, Violaine. "Qualité du partenaire et qualité de l'œuf chez les oiseaux." Thesis, Paris 10, 2009. http://www.theses.fr/2009PA100194/document.
The study concerns female birds' allocation of resources into bird eggs as a function of characteristics of the males. The data collected are the number of eggs and the eggs' characteristics (mass, volume, component mass, yolk testosterone concentration). The manipulated characteristics of the partner are female preference, male social status and song quality. Three experiments were conducted on the domesticated canary (Serinus canaria) in laboratory conditions, with the LECC of the University Paris Ouest Nanterre La Défense (France). Two other experiments were conducted on the grey partridge (Perdix perdix) in a semi-natural environment, at the DISAV of the University degli Studi del Piemonte Orientale (Italy). We found a positive effect of female preference and male social status on yolk mass in the canary. With extra yolk, hatchlings can continue their development even if they are not fed in the first few days after hatching. In the partridge, the positive effect was in yolk testosterone concentration. Increased testosterone level can help precocial chicks compete with neighbouring chicks. Female canaries exposed to artificially enhanced songs laid larger and heavier eggs, with heavier yolks and albumens that enhance embryonic development. Moreover, in canaries, testosterone concentration increased with laying order. Chicks hatched from eggs laid last would be better competitors in the nest to get food from their parents. To conclude, eggs characteristics depend on the male as well as the female
Camarena, Luhrs Tomás. "Les principales espèces de poissons pélagiques côtiers au Sénégal : biologie et évaluation des ressources." Brest, 1986. http://www.theses.fr/1986BRES2020.
Torrents, Oriol. "Biologie des populations du corail rouge Corallium rubrum (L. 1758) de Méditerranée nord-occidentale." Aix-Marseille 2, 2007. http://theses.univ-amu.fr.lama.univ-amu.fr/2007AIX22072.pdf.
The precious Mediterranean red coral Corallium rubrum (L. 1758) is a long–lived colonial sessile octocorallian which develops a red calcareous skeleton well–appreciated since antiquity for its value in jewellery and ornamentation. Professional harvesting, poaching and mass mortality events associated with positive thermal anomalies are the major sources of disturbance for this species. These disturbances have caused a marked decrease both in the abundance and size of colonies in the present populations. The persistence of these populations is linked to management and conservation plans constructed using reliable information about both main life history traits and population dynamics. Despite its value meaning, little is known about the biology and ecology of red coral. The main goals of this study is to provide data about significant life history traits (growth and reproduction) of red coral populations dwelling along the Mediterranean French rocky coasts in order to contribute our understanding of the biology and ecology of this species. In addition, this study will provide information about the effects of mass mortality events on red coral populations in order to better understand how these disturbances affect its population dynamics. The mean growth rate of red coral colonies was 0. 15 mm per year in diameter. Despite the large number of populations studied, growth rates remained stable across a wide variety of habitats analysed. Habitat comparisons were made between cave entrance vs cave interior, 20 vs 40 m depth and Calanques region vs west coast of Corsica Island. However, fecundity (number of mature gonads per polyp) analysed on the same populations seems only to be influenced by food availability. Thus, red coral populations dwelling at the entrance of caves showed larger fecundity than populations dwelling at the interior of the same caves. On the other hand, populations dwelling in contrasted depths (18 – 22 m vs 39 – 42 m) did not show any significant differences on fecundity. The study of reproduction biology of red coral has been completed by studies on reproductive cycle, sex ratio (1:1 overall studied populations), age and size at first reproduction (less than 3 cm corresponding to 7 – 10 years), differential gonad maturity in contrasted locations in both cave and depth factors analyses, inter-annual variability on fecundity (it seems to be low along three years) and the effects of mass mortality events on red coral fecundity. Finally, experiments on thermal tolerance in aquaria have been performed using two populations dwelling at contrasted depths (11 – 14 vs 39 – 42 m). The upper thermal limit was 25 °C. At this temperature, red coral colonies showed necrosis after 10 – 15 days. Polyp activity and calcification was also affected by increase of seawater temperature. Three experiments indicate that colonies from shallow populations had greater thermal tolerance to elevated temperatures than those from the deeper ones. In conclusion, this study furnished data to complete information about population dynamics of red coral. It is the aim of this study is to contribute to the development of mathematical models that can be used to explore the response of red coral populations under different disturbance regimes, as well as to facilitate future research about genetic or environmental factors which can modulate responses of these populations to environmental changes associated to climate change. Finally, these informations will help to improve both management and conservation plans
Simonneaux, Laurence. "Approche didactique et muséologique des biotechnologies de la reproduction bovine." Lyon 1, 1995. http://www.theses.fr/1995LYO10003.
Fréville, Véronique. "La centaurée de la Clape : biologie d'une espèce rare et réflexions méthodologiques." Montpellier 2, 2001. http://www.theses.fr/2001MON20046.
Kobbi, May. "Développement et phénologie de "Ficus microcarpa L;f. " en Tunisie : impact sur la biologie de la reproduction." Montpellier 2, 1998. http://www.theses.fr/1998MON20239.
Exbrayat, Jean-Marie. "Quelques aspects de la biologie de la reproduction chez Typhlonectes compressicaudus (Dumeril et Bibron, 1841), amphibien apode." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37597424v.
Gonzalez, Araya Ricardo. "Incidence de la nutrition sur la reproduction et le développement larvaire d'Ostrea edulis." Thesis, Brest, 2012. http://www.theses.fr/2012BRES0067.
Since the appearance of two successive diseases the production of Ostrea edulis highly cultivated in France dropped from 20,000 tons in the 70’s to 1,500 tons y-1 nowadays. Genetic improvement for resistant strain to Bonamia was successfully explored from the 80’s and opened perspectives for the production of flat oyster spat in hatchery. The knowhow previously achieved on O. edulis controlled reproduction was however insufficient to allow reliable production of juveniles. A re-appropriation of the knowledge of the biology of this species was necessary. A set of experiments was accordingly carried out, with a focus on a key parameter in hatchery, nutrition, which was studied in the present work from broodstock to larvae. To select the best microalgae for O. edulis conditioning, eight single species diets (T-Iso, Chaetoceros gracilis, Skeletonema marinoi, Tetraselmis suecica, Rhodomona salina, Thalassiosira weissflogii, Thalassiosira pseudonana and Pavlova lutheri) were fed to batches of broodstock, which were then compared using ecophysiological and biochemical approaches. Both diatoms, C. gracilis, S. marinoï and the cryptophyte R. salina were highly ingested and absorbed with values ≥ 3 109 μm3 g-1 h-1 and 1.5 mg g-1 h-1 respectively; whereas T. suecica and P. lutheri led to the lowest physiological responses (≤ 0.3 μm3 g-1 h-1 and 0.1 mg g-1 h-1) and holds accordingly no interest for flat oyster conditioning. The main fatty acids accumulated whatever diet were 16 :0, 18 :0, 20 :4(n-3), 20 :5(n-3) et 22 :6(n-3) with two types of response concerning biochemical compounds’ transfer. Thus, when broodstock were conditioned in spring, biochemical data corroborate physiological data. In contrast, when broodstock were conditioned in autumn, low biochemical compounds’ transfer occurred, whereas ingestion and absorption were clearly related to the type of microalgae delivered. A new bispecific diet composed of C. gracilis plus R. salina for O. edulis broodstock conditioning was therefore proposed which clearly increased flat oyster fecundity. Larvae, originated from parents fed C. gracilis plus R. salina, showed good development with survival ≥ 90%, whatever larval diets, with growth, however, varying from 5 to 11 μm d-1. More than 50% of larvae fed T-Iso plus C. gracilis settled whereas poor metamorphosis was recorded when larvae were fed single diets. These results clearly showed that metamorphosis is an essential step for determining undoubtedly the effects of food on O. edulis larvae relying on broodstock and larval diets
Otto, Thurid [Verfasser]. "Reproduction Biology and Populations Genetics of the alien Chinese mitten crab (Eriocheir sinensis) in Schleswig-Holstein / Thurid Otto." Kiel : Universitätsbibliothek Kiel, 2012. http://d-nb.info/1064967302/34.
Zerulla, Florian Niklas [Verfasser], and Claus P. W. [Akademischer Betreuer] Zebitz. "Overwintering and reproduction biology of Drosophila suzukii Matsumura (Diptera: Drosophilidae) / Florian Niklas Zerulla ; Betreuer: Claus P. W. Zebitz." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2019. http://d-nb.info/1176624954/34.
Leturque, Henri. "Evolution du sexe ratio et de la dispersion en populations structurées." Montpellier 2, 2002. http://www.theses.fr/2002MON20177.
Pirog, Agathe. "Structure génétique des populations et biologie de la reproduction chez le requin bouledogue Carcharhinus leucas et le requin tigre Galeocerdo cuvier." Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0008/document.
This PhD thesis focuses on two large shark species, the bull shark Carcharhinus leucas and the tiger shark Galeocerdo cuvier. The aims are to study the genetic structuring of their populations, the effective population size of the delimited populations and the reproductive modes of both species. A strong genetic differentiation was highlighted between bull shark populations from the Western Indian Ocean and the Western Pacific, due to either an absence of contemporary gene flow or to an absence of female gene flow only. On the opposite, tiger shark populations seem genetically homogenous, with important genetic connectivity between both regions. Within each region, no genetic differentiation among localities was highlighted for both species. A weaker genetic diversity was identified for the tiger shark, probably linked to the occurrence of a recent bottleneck occurring less than 3,000 years ago. Around Reunion Island, bull and tiger shark populations present different dynamics, linked to their reproductive modes. Bull shark individuals from both sexes seem to exhibit some fidelity to specific coastal sites (philopatry) to mate and/or deliver embryos, and litters are frequently issued from several fathers (polyandry). On the opposite, mating and pupping areas of the tiger shark remain poorly known, and this species seems exclusively monoandrous, probably linked to its semi-oceanic nature.This work highlights the high dispersal abilities of both species. Their populations present different dynamics, leading to different sensitivities to anthropogenic pressures. These results point out the need to adopt management plans specific to each species
Bachasson, Bernard. "Etude de quelques aspects de la morphologie, de la biologie et de la pisciculture de la tanche (Tinca tinca L. )." Lyon 1, 1995. http://www.theses.fr/1995LYO10114.
Song, Yixian [Verfasser], Barbara [Akademischer Betreuer] Drossel, and Stefan [Akademischer Betreuer] Scheu. "Modelling of sexual reproduction in a world of diverse and limited resources / Yixian Song. Betreuer: Barbara Drossel ; Stefan Scheu." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2011. http://d-nb.info/1105563227/34.
Cavalli, Laurent. "Biologie des populations de salmonidés des lacs de haute altitude du parc national des Ecrins : alimentation, croissance, reproduction." Aix-Marseille 1, 1997. http://www.theses.fr/1997AIX11055.
Rimblot-Baly, Frédérique. "Contribution à la biologie du développement et de la reproduction chez la tortue luth (dermochelys coriacea, vandelli, 1761)." Paris 11, 1991. http://www.theses.fr/1991PA112060.
Mennechez, Gwénaelle. "Urbanisation et espèces généralistes : biologie comparée de la reproduction de l'étourneau Sturnus vulgaris sur un gradient rural-urbain." Rennes 1, 1999. http://www.theses.fr/1999REN10050.
Mavarez, Castillo Jesús. "Phylogéographie et biologie des populations de Biomphalaria Glabrata." Montpellier 2, 2002. http://www.theses.fr/2002MON20027.
Rougeron, Virginie. "Stratégies de reproduction et cycle de transmission : le modèle Leishmania." Montpellier 2, 2009. http://www.theses.fr/2009MON20233.
Mainguy, Julien. "Variabilité génétique et reproduction des mâles chez la chèvre de montagne." Thesis, Université Laval, 2008. http://www.theses.ulaval.ca/2008/25611/25611.pdf.