Live Prey
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. A new device to autonomously feed individualized mantids on extended periods of time
ABSTRACT Mantises can live for many months, are naturally voracious, and feed invariably on live prey. Many species have a propensity for cannibalism and cannot be kept together for most of their life cycle, which makes large-scale rearing typically time-consuming, thus easily becoming prohibitive. This is particularly true for early instars, because they ar
Rev. Bras. entomol.. Publicado em: 13/01/2020
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2. First experimental evidence that a harvestman (Arachnida: Opiliones) detects odors of non-rotten dead prey by olfaction
Harvestmen feed on live, dead and fresh, or decomposing animals, fungi, and plant matter, being very dependent on chemoreception to find food. Herein we performed an experiment to test if individuals of Discocyrtus pectinifemur Mello-Leitão, 1937 (Gonyleptidae) (n = 23) behave differently when in contact with olfactory cues from different sources (rotten pr
Zoologia (Curitiba). Publicado em: 2013-06
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3. Trophic ecology and microhabitat utilization by the Bufo gargarizans, Rana guentheri, and Rana limnocharis in southwestern China
We studied the trophic ecology and microhabitat use of the Asiatic toad, Bufo gargarizans Cantor, 1842; Guentheri frog, Rana guentheri (Boulenger, 1882); and the Ricefield frog, Rana limnocharis (Boie, 1834). These three species are common around Nanchong City, in southwestern China, where they live in the same habitat before hibernation. The main objective
Zoologia (Curitiba). Publicado em: 2012-02
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4. Caracterização da atividade tríptica do copépodo harpacticoida Tisbe biminiensis.
Tisbe biminiensis is a potential live prey for many species of aquatic animals since its nutritional value is better than those found in other feed organisms commonly used in crustacean and fish larvivultures. Live food seems to be a source of exogenous enzymes which eases food digestion of fish and crustacean early life stages. The aim of this work was to s
Publicado em: 2007
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5. Aspects of natural history and conservation of Pseudalopex vetulus (Lund, 1842) (Carnivora: Canidae) / Aspectos da história natural e conservação de Pseudalopex vetulus (Lund, 1842) (Carnivora: Canidae)
The influence of human activities on wild species has been increasing in a rate without precedents. As to Cerrado, the second biggest Brazilian vegetal formation, around a half of its original ground cover has already been changed into grazing lands, annual crops and other sort of usages; such fact represents a threatening to the survival of species that liv
Publicado em: 2006
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6. Desigualdades e rupturas sociais na metrópole: os moradores de rua em São Paulo
This thesis is intended to analyze the factors that lead a number of people to a process of social rupture, forcing them to live on the streets of São Paulo city and describing to the degradation of the living conditions reached in the big cities which has taken place since the late twentieth century and during lhe first years of this century. These days in
Publicado em: 2003
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7. Aspectos da ecologia e socialidade de uma aranha colonial, Eriophora bistriata (Renger, 1936) (Araneidae)
Eriophora bistriata (Araneidae) is a pre-social spider, common in Brazilian cerrado. The spiders have individual orb-webs but cooperate in capture large prey. The spiders built the individual orbs daily, under a common suport silk line that is permanent and very resistant. The orbs are linked to each other by secondary support lines, forming the capture web.
Publicado em: 1987
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8. Fruit or aposematic insect? Context-dependent colour preferences in domestic chicks.
Colours are common stimuli in signalling systems. Requirements to function well as a signal sometimes conflict between different signallers, and the same colour stimulus is used to convey completely different messages to the same receiver. Fruits and aposematic insects both use red coloration as a signal, in the former case to signal profitability and in the
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9. Protistan Grazing Analysis by Flow Cytometry Using Prey Labeled by In Vivo Expression of Fluorescent Proteins
Selective grazing by protists can profoundly influence bacterial community structure, and yet direct, quantitative observation of grazing selectivity has been difficult to achieve. In this investigation, flow cytometry was used to study grazing by the marine heterotrophic flagellate Paraphysomonas imperforata on live bacterial cells genetically modified to e
American Society for Microbiology.
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10. Live birth in Cretaceous marine lizards (mosasauroids).
Although live-bearing (viviparity) has evolved around 100 times within reptiles, evidence of it is almost never preserved in the fossil record. Here, we report viviparity in mosasauroids, a group of Cretaceous marine lizards. This is the only known fossil record of live-bearing in squamates (lizards and snakes), and might represent the oldest occurrence of t
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11. A conotoxin from Conus textile with unusual posttranslational modifications reduces presynaptic Ca2+ influx
Cone snails are gastropod mollusks of the genus Conus that live in tropical marine habitats. They are predators that paralyze their prey by injection of venom containing a plethora of small, conformationally constrained peptides (conotoxins). We report the identification, characterization, and structure of a γ-carboxyglutamic acid-containing peptide, conoto
The National Academy of Sciences.
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12. Demonstration of toxicity to fish and to mammalian cells by Pfiesteria species: Comparison of assay methods and strains
Toxicity and its detection in the dinoflagellate fish predators Pfiesteria piscicida and Pfiesteria shumwayae depend on the strain and the use of reliable assays. Two assays, standardized fish bioassays (SFBs) with juvenile fish and fish microassays (FMAs) with larval fish, were compared for their utility to detect toxic Pfiesteria. The comparison included s
National Academy of Sciences.