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| Registros recuperados: 94 | |
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| Rodrigues,Ricardo Vieira; Freitas,Luciano Siqueira; Sampaio,Luís André. |
| Este estudo teve como objetivo determinar o efeito da intensidade luminosa sobre a capacidade de predação de larvas do peixe-rei marinho Odontesthes argentinensis. Ovos fertilizados foram coletados na Praia do Cassino,Rio Grande, Rio Grande do Sul (RS). Ao completarem dois dias e posteriormente, 14 dias de vida, 15 grupos com 10 larvas foram transferidos para béqueres de 800mL. As larvas foram mantidas em jejum durante 12 horas nas intensidades luminosas de 0, 75, 150, 1500 e 3000lux (três repetições para cada tratamento). Logo em seguida foram oferecidos náuplios de Artemia sp. na densidade de oito náuplios mL-1 durante 15 minutos. As larvas foram imediatamente anestesiadas e fixadas em formol 10%. Posteriormente foi contado o número de náuplios presentes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Odontesthes argentinensis; Intensidade luminosa; Larva; Alimentação. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100040 |
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| Cerqueira,Vinicius Ronzani; Brügger,André Macedo. |
| Different light intensities were tested during the larval rearing of fat snook (Centropomus parallelus) to evaluate its influence on survival and functional swim bladder rate. Newly-hatched larvae were obtained by stripping of hormonally induced broodstock, and were stocked in 32-liter tanks at densities from 30 to 50 L-1. Four experiments were carried out testing six light intensities: 50, 100, 200, 500, 1500, and 2500 lx, and total darkness as a control. Mean survival ranged from 0.06 to 16.0% and were significantly influenced by light intensity. Complete darkness resulted in 100% mortality after one week, larvae appeared to have starved since they had empty stomachs. The species has the characteristics of a visual-feeder. Survival was the highest at 200... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fat snook; Larva; Centropomus parallelus; Light intensity; First-feeding. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000400004 |
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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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| Praça,Lílian Botelho; Batista,Andréa Cardoso; Martins,Érica Soares; Siqueira,Claúdia Brod; Dias,Daniel Gerheim de Souza; Gomes,Ana Cristina Menezes Mendes; Falcão,Rosana; Monnerat,Rose Gomes. |
| O objetivo deste trabalho foi selecionar entre 300 estirpes de Bacillus thuringiensis as efetivas simultaneamente contra larvas de Spodoptera frugiperda J.E. Smith e Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), Anthonomus grandis Boheman (Coleoptera: Curculionidae), Aedes aegypti Linnaeus e Culex quinquefasciatus Say (Diptera: Culicidae). Foram selecionadas duas estirpes de B. thuringiensis, denominadas S234 e S997, que apresentaram atividade contra as três ordens de insetos. As estirpes foram caracterizadas por métodos morfológicos, bioquímicos e moleculares. As mesmas apresentaram duas proteínas principais de 130 e 65 kDa, produtos de reação em cadeia da polimerase de tamanho esperado para a detecção dos genes cry1Aa, cry1Ab, cry1Ac, cry1B e... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Larva; Controle biológico; Proteína; Reação em cadeia da polimerase; Combate às pragas; Biopesticida. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000100002 |
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| ANDREOTTI, R.; GARCIA, M. V.; MARTINS, K. R.; HIGA, L. de O. S.; DUARTE, P. O.. |
| A Febre Maculosa é uma doença infecciosa, febril aguda de gravidade variável, podendo apresentar formas clínicas leves e atípicas até formas graves, com elevada taxas de letalidde. Ela é transmitida pela picada de carrapatos infectados, geralmente o Amblyomma sculptum com bactérias do gênero Rickettsia rickettsii. Uma vez ocorrida a infecção, o período de incubação até o início dos sintomas pode variar de dois a 14 dias, com média de sete dias após a picada. |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Amblyomma sculptum; Carrapato; Larva; Ninfa; Incubação. |
| Ano: 2019 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1113230 |
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| Hernández,David Roque; Sánchez,Sebastián; Santinón,Juan José; Domitrovic,Hugo Alberto. |
| O presente estudo teve como objetivo avaliar diferentes fontes de proteína na primeira alimentação de jundiá (Rhamdia quelen) sob condições de laboratório. Foram testadas três rações balanceadas secas: ovo de peixe (TA), hidrolisado de carcaça do peixe (TB) e fígado de frango cru (TC), na quais foram analisadas, pelo crescimento, a biomassa final produzida e a sobrevivência das larvas. O ensaio teve uma duração de 20 dias, e as rações foram fornecidas ad libitum. As larvas alimentadas com ovo de peixe apresentaram os melhores resultados com peso médio individual de 340mg, sobrevivência de 57% e biomassa final de 1.350mg, diferindo significativamente dos demais tratamentos. Os resultados indicaram que a formulação de rações balanceadas com ovos de peixes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alimentação; Larva; Ovo de peixe; Proteínas; Rações artificiais; Rhamdia quelen. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000300037 |
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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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| 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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| Salik,Lucy Mila Garcia; Dias,Fernando Maia Silva; Carneiro,Eduardo; Casagrande,Mirna Martins; Mielke,Olaf Hermann Hendrik. |
| ABSTRACT The external morphology and life cycle of the immature stages of Temenis laothoe meridionalis Hübner, [1819] (Lepidoptera, Nymphalidae, Biblidinae), associated with Serjania laruotteana (Sapindaceae) in Curitiba, Paraná, Brazil, are described and illustrated with photographs and images from scanning electron microscopy. Special aspects of the external morphology are compared to the immature stages of other species of Biblidinae. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Larva; Morphology; Neotropical; Host plant. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262017000100016 |
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| Pinheiro,Lívia R; Silva,Renato O; Duarte,Marcelo. |
| Egg and pupa of Lobeza dentilinea Schaus, 1901 are described and illustrated for the first time. Eggs are smooth, dome-shaped, and greenish at oviposition. Last instar larvae have an aposematic coloration and the chaetotaxy is very similar to other notodontines, except for the number of lateral setae: L. dentilinea has three instead of four lateral setae on abdominal segments A3-A6. Pupae are light brown and typical of the family, with the last abdominal segments broadly round. Evidence from the adult morphology supporting the placement of the genus in Notodontinae includes proboscis smaller than the length of the head, epiphysis with more than half the length of tibia, tarsal claws simple, and labial palpi short. Male and female are confidently... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cteniophore; Genitalia; Larva; Neotropical region; Pupa. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400014 |
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| Abdalla,Fábio C; Sampaio,Guilherme; Pedrosa,Marina; Sipriano,Thamiris P; Domingues,Caio Eduardo C; Silva-Zacarin,Elaine Cristina M; Camargo,Daiane A. de. |
| Larval development of Physocephala (Diptera, Conopidae) in the bumble bee Bombus morio (Hymenoptera, Apidae). In the summer of 2012, a high incidence of conopid larvae was observed in a sample of female B. morio collected in remaining fragments of semidecidual forest and Cerrado, in the municipality of Sorocaba, state of São Paulo, Brazil. The larval development of conopid flies was studied, beginning at the larval instars (LO to L3) and PUP, until the emergence of the imago under laboratory conditions and inside the host. At the first instar, or LO, the microtype larvae measured less than 1 mm in length. During the transition from L1 to L3, the larvae grew in length. At L3, the larvae doubled their length (4 mm) and then started to develop both in length... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conopidae; Insecta; Larva; Parasitism; Physocephala. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262014000400007 |
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| Registros recuperados: 94 | |
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