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| Registros recuperados: 94 | |
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| Importância e estratégias para o controle de moscas na propriedade rural é o tema do Prosa Rural desta semana. Para controlar o excesso de moscas o produtor só preciso adotar algumas medidas simples. Como não é possível e nem mesmo desejável eliminar totalmente esses insetos, o método mais adequado para controlar a população de moscas na propriedade rural é o mecânico. Explica o veterinário Vítor Hugo Grings, da Embrapa Suínos e Aves. As moscas se alimentam de matéria orgânica como fezes de animais e de pessoas, restos de comida e sobras da produção agrícola. O método mecânico consiste em eliminar esses focos de atração, onde as moscas realizam a postura de larvas. "Qualquer matéria orgânica, onde o dejeto é fresco, oferece condições apropriadas para a... |
| Tipo: Prosa Rural (INFOTECA-E) |
Palavras-chave: Bactéria; Controle químico; Doença; Larva; Matéria orgânica; Mosca; Propriedade rural; Veneno. |
| Ano: 2008 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1016506 |
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| Robin, Jean; Vincent, Benoit. |
| Recent advances have led to the development of inert diets for first-feeding marine fish larvae. The purpose of the present study was to evaluate fatty acid (FA) incorporation into larva using practical-type and semipurified diets as first food for larvae. Experimental microparticulate diets were fed to gilthead sea bream larvae, right from the mouth opening to day 21 post hatching. Five basal diets were compared, using fish meat or casein as main protein sources, and fish protein concentrate or casein hydrolysates and algae powder (Schizochytrium). Diets contained soybean lecithin to provide polar lipids and this also provided a high linoleic acid (18:2n-6) content. n-3 HUFA (1.5-1.7% DM) were mainly in dietary neutral lipids, with a part in polar lipids... |
| Tipo: Text |
Palavras-chave: Sparus aurata; Inert diet; Fatty acids; Larva; Fish. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-499.pdf |
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| Joly, Jean-pierre; Bouget, Jean-francois; Hirata, Toshio. |
| L’implantation récente de Rapana venosa, gastéropode prédateur originaire d’Extrême Orient, en plusieurs points du globe (USA, France, Uruguay, Argentine) et son impact sur les populations de bivalves autochtones justifient un certains nombre de recherches engagées par les pays concernés. Le présent rapport compile les dernières informations scientifiques disponibles sur la biologie de R. venosa. Par ailleurs, l’opportunité d’obtenir des pontes en milieu naturel et en captivité en 2001 a permis de faire des observations sur la maturation des larves. Il apparaît que dans les conditions de températures régnant en Baie de Quiberon en été (18 à 22°C), les larves de Rapana venosa sont capables d’éclore. L’impossibilité, dans cette expérimentation, d’amener ces... |
| Tipo: Text |
Palavras-chave: Rapana venosa; Biologie; Larve; Eclosion; Rapana venosa; Biology; Larva; Hatching. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00016/12699/9620.pdf |
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| Torres, Gabriela; Charmantier, Guy; Wilcockson, David; Harzsch, Steffen; Giménez, Luis. |
| Developing physiological mechanistic models to predict species’ responses to climate‐driven environmental variables remains a key endeavor in ecology. Such approaches are challenging, because they require linking physiological processes with fitness and contraction or expansion in species’ distributions. We explore those links for coastal marine species, occurring in regions of freshwater influence (ROFIs) and exposed to changes in temperature and salinity. First, we evaluated the effect of temperature on hemolymph osmolality and on the expression of genes relevant for osmoregulation in larvae of the shore crab Carcinus maenas. We then discuss and develop a hypothetical model linking osmoregulation, fitness, and species expansion/contraction toward or away... |
| Tipo: Text |
Palavras-chave: Carcinus maenas; Climate change; Coastal zone; Larva; MRNA expression; Multiple stressors; Osmoregulation; Salinity; Temperature. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00692/80408/83516.pdf |
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| Beiras, R; His, Edouard. |
| The effects of Hg concentrations ranging from 0 (control) to 1024 mu g l(-1) upon embryogenesis, survival and growth of Mytilus galloprovincialis mussel larvae were investigated. Embryogenesis was abnormal in 50% of the individuals at 10 mu g l(-1). The 48 h LC(50) for D-shaped, early umbonate, late umbonate and eyed larvae were 51, 164, 322 and 383 pg l(-1) respectively. The LC(50) was an allometric function of ash-free dry weight with exponent b = 0.60. Larval growth was significantly reduced after 6 d exposure to 4 mu g Hg l(-1) and after 10 d exposure to 2 mu g l(-1). No significant differences in lethal or sublethal sensitivity to Hg were found between M. galloprovincialis and previously studied Crassostrea gigas embryos and larvae. The implications... |
| Tipo: Text |
Palavras-chave: Mercury; Mytilus; Mussel; Larva; Growth; Embryo; Bioassay; Ecotoxicology. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00258/36946/35665.pdf |
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| Thomas, Yoann; Garen, Pierre; Pouvreau, Stephane. |
| We applied, for the first time, a dynamic energy budget (DEB) growth model to the larval phase in the pearl oyster Pinctada margaritifera var. cumingii (Linnaeus, 1758) to evaluate the impact of spatio-temporal variation in the atoll lagoon environment on its capacity for development. The specific parameters of the model, which represent ingestion, temperature effect and the relationship between length and biovolume of the larvae, were determined from experiments or taken from the literature. The interpretation of the values of these parameters allowed us to identify the underlying adaptive character trait: P. margaritifera larvae have a good capacity to exploit low food concentrations and a narrow range of thermal tolerance restricted to hydrobiological... |
| Tipo: Text |
Palavras-chave: Growth Model; Dynamic Energy Budget; Larva; Pinctada Margaritifera; Atoll Lagoon. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00048/15919/13346.pdf |
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| Gatesoupe, Fj. |
| The proportion of vibrio E, dominant in healthy turbot larvae, was artificially increased in the rotifer enrichment medium. The maid effect of this vibrio enrichment was to improve the resistance of larval turbot challenged with a pathogenic strain of Vibrio splendidus, vibrio P. The improvement of the survival rates was significant with 1.5 x 10(6) CFU of vibrio E added per mi of enrichment medium, and it was still maximum at the hi hest dose tested (5 x 10(7) CFU.ml(-1); 80 +/- 2% of survivors after 48 h of challenge, versus 50 +/- 2 % for the control group). Further in vitro characterisation showed that vibrio E was able to grow in the presence of the chelating agents EDDHA and EDTA, while producing siderophore, as revealed by chrome azurol S dyeing.... |
| Tipo: Text |
Palavras-chave: Bacteria; Pathogenic Vibrio; Probiotic Vibrio; Experimental infection; Siderophore; Turbot; Larva. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00065/17671/15199.pdf |
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| Robin, Jean; Peron, Alexandre. |
| Semi-purified diets were used to feed gilthead sea bream larvae as first food from mouth opening until day 17. Four diets were formulated on the basis of a previous one used as control (D1). Three experimental diets differed only by the lipids added. One diet contained n-3 highly unsaturated fatty acids (n-3 HUFA) plus arachidonic acid (D2), one diet n-3 HUFA without arachidonic acid (D3) and one diet without n-3 and n-6 HUFA (D4). The three experimental diets contained 18:3n-6 in order to follow the influence of dietary HUFAs on elongation-desaturation capacities. Larval growth and survival were similar with diet D1 and D2. Lowest growth and survival were observed for larvae fed the HUFA free diet D4. Larval survival but not growth was significantly... |
| Tipo: Text |
Palavras-chave: Fatty acids; Inert diet; Larva; Sparus aurata. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-500.pdf |
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| Pietrykowska-Tudruj, E.; Staniec, B.; Wojas, T.; Alexey, A.. |
| For the first time eggs, larvae and pupae obtained by rearing are described for Astrapaeus, a monotypic West Palearctic rove beetle genus of a puzzling phylogenetic position within the megadiverse tribe Staphylinini. Morphology of the immature stages of Astrapaeus ulmi is compared to that of other members of the tribe and discussed in a phylogenetic context. Contrary to conventional systematics and in accordance with recently developed phylogenetic hypotheses based on morphology of adults, larval morphology supports the non-Quediina affiliation of Astrapaeus. Eggs and pupae provided fewer characters with putative phylogenetic signal. Under laboratory conditions, a peculiar preference for isopod prey was observed for A. ulmi. However, this could not be... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Egg; Feeding preference; Larva; Life cycle; Morphology; Phylogeny; Pupa; 42.75; 42.64. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/472282 |
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| Damen, Peter; Dictus, Wim J.A.G.. |
| The development of the muscular system of the gastropod mollusc Patella has been thoroughly studied. As a result, two larval retractors, the main and accessory larval retractor, had been described in the larva of Patella. These muscles were supposed to be responsible for the retraction of the larval body into the shell. Previously no larval extensors, which would be responsible for the extension of the larval body out of the shell, have been described. Using cell-lineage tracer injection and phalloidin staining of muscles, a newly-discovered muscle is herein identified in the larva of Patella coerulea. A functional model is presented in which two muscles are responsible for the extension of the larva, the newly-discovered muscle together with the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Patella; Gastropoda; Mollusca; Development; Larva; Muscle; Antagonist; Cell-lineage. |
| Ano: 2002 |
URL: http://www.repository.naturalis.nl/record/534309 |
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| Invernizzi,C; Rivas,F; Bettucci,L. |
| Chalkbrood disease affects the larvae of honeybees Apis mellifera L. and is caused by the fungus Ascosphaera apis. Infected larvae die when they are stretched in the cap cell and suffer a gradual hardening that ends in a very hard structure (mummie). Several studies have demonstrated that colonies that express an efficient hygienic behaviour (uncapping of cell and subsequent removal of dead brood) exhibit a higher resistance to the disease. However, it remains unclear whether the advantage of hygienic colonies over less hygienic ones lies in the ability to remove mummies or in the early detection of infected larvae and its cannibalization before they harden. To elucidate this aspect, the hygienic behaviour of 24 colonies, which were subsequently provided... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Honey bee; Ascosphaera apis; Larva; Selection. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000100004 |
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| Victoriano,Eliane; Pinheiro,Daniela O.; Gregório,Elisa A.. |
| The silk gland in Lepidoptera larvae is responsible for the silk production used for shelter or cocoon construction. The secretion of fibroin and sericin by the different silk gland regions are well established. There are few attempts to detect lipid components in the insect silk secretion, although the presence of such element may contribute to the resistance of the shelter to wet environment. This study characterizes the glandular region and detects the presence of lipid components in the secretion of the silk gland of Diatraea saccharalis(Fabricius). The silk gland was submitted to histochemical procedure for lipid detection or conventionally prepared for ultrastructural analyses. Lipid droplets were histochemically detected in both the apical cytoplasm... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Secretory cell; Insect; Larva. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000500011 |
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| Santos,Terezinha Monteiro dos; Figueira,Liliane Karla; Boiça Júnior,Arlindo Leal; Lara,Fernando Mesquita; Cruz,Ivan. |
| O pulgão Schizaphis graminum (Rondani) (Hemiptera: Aphididae) é uma das principais pragas do sorgo. O objetivo deste trabalho foi determinar o efeito da alimentação deste inseto com genótipos de sorgo resistentes e suscetíveis no desenvolvimento do predador Cycloneda sanguinea (Linnaeus) (Coleoptera: Coccinellidae). O pulgão foi criado em folhas dos genótipos de sorgo GR 11111 e TX 430 x GR 111, resistentes, GB 3B, de resistência moderada e BR 007B, suscetível ao hemíptero. As larvas de C. sanguinea foram alimentadas diariamente, ad libitum, com ninfas e adultos de S. graminum. A duração das fases de desenvolvimento e a sobrevivência de C. sanguinea não foram influenciadas pelo genótipo. Apenas a duração do quarto ínstar, da fase larval e do período de... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Larva; Etapa de desenvolvimento; Planta hospedeira; Resistência às pragas; Controle biológico. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000500001 |
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| Registros recuperados: 94 | |
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