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| Registros recuperados: 191 | |
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| Ekong,Moses B; Peter,Aniekan I; Ekpene,Ubong U; Bassey,Enobong I; Eluwa,Mokutima A; Akpanabiatu,Monday I; Ekanem,Theresa B. |
| Rauwolfia vomitoria (RV) has potent sedative effect, which may result in severe unpleasant consequences if not controlled. This necessitated this study on the effect of Gongronema latifolium (GL) on RV-induced behaviour, biochemical activities, and histomorphology of the cerebral cortex. Eighteen male Wistar rats of average weight 266 g were grouped into three (13). Group 1 was the control administered 0.5 mL of Tween®20, while groups 2 and 3 were administered 150 mg/kg of RV, and a combination of 150 mg/kg of RV and 200 mg/kg of GL (RV+GL), respectively for seven days. Twelve hours after treatments, open field neurobehavioral test was carried-out and the animals euthanized. Their sera were analyzed, and their cerebral cortices routinely processed by... |
| Tipo: Journal article |
Palavras-chave: Rauwolfia vomitoria; Gongronema latifolium; Behavior; Enzymes; Lipid; Cerebral cortex; Histomorphology. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100013 |
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| Jiao,GB; Zhu,MS. |
| In the current work, the courtship and mating of Scorpiops luridus Zhu Lourenço & Qi, 2005 (Euscorpiidae) from Xizang province (Tibet), China, were studied for the first time in the laboratory. Most of the mating behaviors in Scorpiops luridus are not remarkably different from those exhibited by other scorpions. However, for the first time a male pulling a female with its chelicerae to rapidly accomplish the sperm uptake was observed. Additionally, the sexual stinging behavior displayed by the male occurred in the initial stage, not during the promenade stage as previously described in several scorpion species. Through observation and analysis, we speculate that venom injection during sexual stinging is selective, possibly relying on the status... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scorpion; Scorpiops; Courtship; Mating; Behavior. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000100015 |
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| Feldmann, Rodney M.. |
| Decapods are the most diverse and complex group of crustaceans, adapted for life in all parts of the marine environment, many aquatic habitats, and some terrestrial niches. With this diversity of life styles, a vast range of morphotypes of decapods has evolved, exploiting almost every imaginable variation in morphology of the complex exoskeleton that characterizes them. Many of the morphological variants are a response to exploiting a particular niche in which the organisms live or an adaptation to particular behavioral characteristics. Assessing the significance of morphological variation in the fossil record is challenging because of the taphonomic overprint that results in loss of soft tissue, preservation of partial remains of hard parts, and vastly... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Crustacea; Decapoda; Mesozoic; Cenozoic; Behavior. |
| Ano: 2003 |
URL: http://www.repository.naturalis.nl/record/534405 |
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| Moretti,Marcelo S.; Loyola,Rafael D.. |
| Many species of Trichoptera larvae use organic or inorganic particles to build cases that protect them from predators. The study of the wide variety of structures produced by trichopterans is important to understand the evolution of case building behavior. The objective of this work was to investigate if larvae of Barypenthus concolor (Burmeister) are capable of selecting particles of specific sizes to build their cases. The study site was an altitudinal stream in Serra do Cipó National Park, MG, Brazil). Cases and substrate samples were collected at three sites of the stream and submitted to granulometric analyses. The average mass of each particle size found in each site was used to determine the particle size proportion present in the substrate. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Benthic macroinvertebrate; Altitudinal stream. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000200024 |
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| Reu Jr.,Wilson F.; Del-Claro,Kleber. |
| Although very abundant in the Neotropics, there is little information about the biology, ecology and natural history of Brazilian Chlamisinae beetles. In the present study we investigated directly in the Cerrado vegetation the aspects of natural history and biology of Chlamisus minax Lacordaire. The results showed that the species has annual cycle and the adults are present in the field during the spring and summer when the reproduction occurs. The females cover their eggs with a mantle, and later on the rests of the egg and faeces are added by the larva to the mantle to produce a protective case. The six larval morpho-stages are herbivorous and feed on floral buds of Heteropterys pteropetala A. Juss. (Malpighiaceae). The larvae pupate in the host plants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Beetle; Behavior; Cerrado; Herbivory. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000300001 |
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| Hirose,Edson; Panizzi,Antônio R.; Cattelan,Alexandre J.. |
| Laboratory studies with 1st instar of southern green stink bug, Nezara viridula (L.) indicated that relative humidity (RH) greatly affected nymph emergence and survivorship up to the 2nd instar, reaching the maximum value (<FONT FACE=Symbol>»</FONT> 90%) with RH of > 80%. At 60% RH, 60% of the nymphs emerged and survived, while with 0% RH only <FONT FACE=Symbol>»</FONT> 15% of eggs hatched, and most nymphs died. Emerged nymphs from egg masses placed in plastic boxes with a gradient of humidity remained on egg shells for ca. one day. After this period, they dispersed and regrouped on top of shells 6.8 ± 0.67 times, until they abandoned the shells toward the source of humidity, avoiding the water-saturated areas. Duration taken for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heteroptera; Stink bug; Behavior; Aggregation; Microclimate. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000600006 |
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| Guillermo-Ferreira,R; Del-Claro,K. |
| Current evidence suggests that in Hetaerina damselflies males exhibit lek mating system. In this study, in order to answer if the same occurs in Hetaerina rosea Selys, we manipulated vegetation substrates used as territories and quantified the number of visiting females, males defending territories and fight intensity. We also examined whether body size and wing pigmentation are selectable traits in male-male competition, and if age affects male territorial behavior. Our results showed that males with larger pigmented areas won more contests, independently of body size. Old males changed from territoriality to sneaking strategy. Contrary to other Hetaerina species, males of H. rosea do not display lek behavior, but defend resources according to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Lek; Territoriality; Behavior. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000100011 |
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| Carvalho,Alessandra R.; Bueno,Vanda H.P.; Pedroso,Elizabeth C.; Kon,Leonardo I.; Diniz,Alexandre J.F.; Silva,Robson J.. |
| Several species of Orius Wolff are used in biological control of thrips in protected cultivations in temperate regions, but some of them show reproductive diapause, compromising the efficiency of these agents of biological control. There are no reports on the biology of the neotropical species Orius thyestes Herring under different environmental conditions. The purpose of this work was to investigate the influence of photoperiod on reproduction and longevity of this predator. Nymphs were kept in petri dishes in climatic chambers at 28 ± 1°C, 70 ± 10% RH and under the photoperiods of 12L:12D, 11L:13D, 10L:14D e 09L:15D. The mating adults were kept in petri dishes with Bidens pilosa L. Asteraceae inflorescences as oviposition substracts and eggs of Anagasta... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Predator; Fecundity; Photophase; Behavior; Biological control. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000400010 |
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| Pereira,Jéssica A.; Veronez,Alexandra C.S.; Coppo,Gabriel C.; Duca,Charles; Chippari-Gomes,Adriana R.; Gomes,Levy C.. |
| ABSTRACT Oxygen and temperature are the most limiting factors in aquatic environments. Several species are exposed to variations of these factors in water because of physical, chemical and biological processes. The objective of this study was to evaluate the metabolic profile and the tolerance to the hypoxia of Geophagus brasiliensis exposed to changes in temperature and oxygen availability. The fish were exposed to 20 and 90% of oxygen saturation combined with different temperatures (20°, 24° and 28° C) for 8 h. Hepatic and muscular glycogen, as well as the activities of lactate dehydrogenase (LDH), malate dehydrogenase (MDH), citrate synthase (CS) and their ratios were evaluated. Both glycogen and MDH activity showed a significant difference in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aerobic and anaerobic pathways; Behavior; Metabolism; Oxygen. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100202 |
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| Santos,Alejandra F. G. N.; Alcaraz,Carles; Santos,Luciano N.; Hayashi,Carmino; García-Berthou,Emili. |
| We experimentally examined the predator-prey relationships between juvenile spotted sorubim Pseudoplastystoma corruscans and young-of-the-year invasive and native fish species of the Paraná River basin, Brazil. Three invasive (peacock bass Cichla piquiti, Nile tilapia Oreochromis niloticus, and channel catfish Ictalurus punctatus) and two native (yellowtail tetra Astyanax altiparanae and streaked prochilod Prochilodus lineatus) fish species were offered as prey to P. corruscans in 300 L aquaria with three habitat complexity treatments (0%, 50% and 100% structure-covered). Prey survival was variable through time and among species (C. piquiti < O. niloticus < A. altiparanae < P. lineatus < I. punctatus), depending largely on species-specific prey... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Experiment; Habitat Complexity; Predator-Prey Interactions; Pseudoplatystoma corruscans. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100016 |
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| Golombieski,Jaqueline Ineu; Becker,Alessandra Janaína; Almeida,Caroline Bruzza; Almeida,Ana Paula Gottlieb; Baldisserotto,Bernardo. |
| The aim of this study was to determine the preferred pH in silver catfish Rhamdia quelenjuveniles acclimated to different water hardness and the effect of shelters and infection by Ichthyophthirius multifiliis. Fish were acclimated for two weeks at different water hardness levels (4, 24, 50, or 100 mg CaCO3 L-1) and then transferred to a polyethylene tube with a pH gradient ranging from 3.5 to 11.7 and maintaining the same hardness. The position of the fish in the pH gradient was observed at 1, 2, 4, 6, 8, 10, and 12 h after transfer. Acclimation to different water hardness did not change pH preference of uninfected silver catfish (pH 7.30-7.83), and the presence of a shelter at the preferred pH or outside this preferred pH did not change the chosen pH... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Calcium; Hardness; Ichthyophthirius multifiliis; Shelter. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300661 |
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| Registros recuperados: 191 | |
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