Gill Ventilation
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Oxygen consumption remains stable while ammonia excretion is reduced upon short time exposure to high salinity in Macrobrachium acanthurus (Caridae: Palaemonidae), a recent freshwater colonizer
ABSTRACT Palaemonid shrimps occur in the tropical and temperate regions of South America and the Indo-Pacific, in brackish/freshwater habitats, and marine coastal areas. They form a clade that recently (i.e., ~30 mya) invaded freshwater, and one included genus, Macrobrachium Bate, 1868, is especially successful in limnic habitats. Adult Macrobrachium acanthu
Zoologia (Curitiba). Publicado em: 23/10/2017
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2. Toxicidade da deltametrina (formulação Butox CE25) nas respostas cardio-respiratórias da tilápia-do-Nilo (Oreochromis niloticus)
Deltamethrin is a synthetic pyrethroid pesticide, type II, considered of low persistence in the environment and widely utilized in agriculture and aquaculture to control plagues and aquatic parasites respectivamently. In spite of it low toxicity in mammals, this pesticide can be extremely toxic for fish. In this study, we evaluate the effects of a sub-lethal
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/11/2011
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3. Control of respiration in fish, amphibians and reptiles
Fish and amphibians utilise a suction/force pump to ventilate gills or lungs, with the respiratory muscles innervated by cranial nerves, while reptiles have a thoracic, aspiratory pump innervated by spinal nerves. However, fish can recruit a hypobranchial pump for active jaw occlusion during hypoxia, using feeding muscles innervated by anterior spinal nerves
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-05
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4. Caracterização dos quimiorreceptores de O2 envolvidos no controle dos reflexos cardio-respiratórios de trairão, Hoplias lacerdae (Teleostei, Erythrinidae) em resposta à hipóxia ambiental
The ability to sense and respond to oxygen availability in the environment is of extreme functional importance for fish. This is even more so in tropical freshwater habitats where environmental hypoxia can occur rapidly in space and time. Recent physiological studies on the cardio-respiratory response of tropical fishes have focused on hypoxia tolerant speci
Publicado em: 2008
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5. Efeito do inseticida organofosforado metilparation (Folisuper 600BR) sobre a função cardio-respiratória do peixe teleósteo matrinxã, Brycon cephalus
Methyl parathion (MP) is an organophosphorus insecticide used worldwide in agriculture and aquaculture due to its high activity against a broad spectrum of insect pests. In a first phase of the study, specimens of matrinxã (Brycon cephalus) were exposed to a sublethal concentration (2 mg.L-1, 1/3 of the 96h-LC50) of MP (Folisuper 600, MP 600 g.L-1) for 96h,
Publicado em: 2007
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6. Alterações bioquímicas e cardio-respiratórias de Tilápia do Nilo (Oreochromis niloticus) frente à exposição sub-letal ao sulfato de cobre.
The present study evaluated the biochemical, hematological and cardio-respiratory responses of Nile tilapia (Oreochromis niloticus) to copper sulfate (CuSO4). A group of fish (T2; n = 8) was exposed to 50% of a CL50 (48 h) of CuSO4, while the control group (T1; n = 8) was submitted to the same conditions of water quality without CuSO4. Samples of blood, gill
Publicado em: 2005
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7. Efeitos da temperatura nas respostas cardio-respiratórias e na respiração aérea acessória de JEJU, Hoplerythrinus unitaeniatus (Erytrinidae) aclimatados a 15, 20, 25 e 30C e submetidos a variações de O2 ambiental.
Peixes de água doce tropical vivem em ambientes de altas temperaturas e baixas concentrações de O2. Isto resultou, ao longo do processo evolutivo, na necessidade da tomada do ar atmosférico em várias espécies de peixes, a fim de compensar seus requerimentos metabólicos, o que requereu modificações anatômicas, fisiológicas e bioquímicas. Estudos s
Publicado em: 2003
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8. Role of chloride-mediated inhibition in respiratory rhythmogenesis in an in vitro brainstem of tadpole, Rana catesbeiana.
1. The isolated brainstem of larval Rana catesbeiana maintained in vitro generates neural bursts that correspond to the lung and gill ventilatory activity generated in the intact specimen. To investigate the role of chloride channel-dependent inhibitory mechanisms mediated by GABA(A) and/or glycine receptors on fictive lung and gill ventilation, we superfuse
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9. Respiratory activity in the facial nucleus in an in vitro brainstem of tadpole, Rana catesbeiana.
1. In studies of the central neural control of breathing, little advantage has been taken of comparative approaches. We have developed an in vitro brainstem preparation using larval Rana catesbeiana which generates two rhythmic neural activities characteristic of lung and gill ventilation. Based on the pattern of the facial (VII) nerve activity both lung and