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| Registros recuperados: 43 | |
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| Fracasso,Hélio Augusto Alves; Branco,Joaquim Olinto; Barbieri,Edison. |
| Despite being widely distributed in South America and having relatively large populations, little is known about the trophic ecology of the South American Tern (Sterna hirundinacea) and Cabot's Tern (Thalasseus acuflavidus). In Brazil, South American and Terns Cabot's breed in mixed colonies from the state of Espírito Santo to Santa Catarina. Here, we describe results of a study of the feeding ecology of these two species during the reproductive seasons of April to October of 2003, 2005 and 2006 from Cardos Island, Santa Catarina, Brazil. A total of 6248, 5140, and 4006 fishes were delivered to chicks or females by South American Terns; and 1157, 628 and 98 fish and or other prey items by Cabot's Terns during the breeding seasons of 2003, 2005, and 2006,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cabot's Terns; South American Terns; Feeding ecology; Prey; Foraging. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300016 |
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| De Ruiter, Stacy; Bahr, Alexander; Blanchet, Marie-anne; Hansen, Sabina Fobian; Kristensen, Jakob Hojer; Madsen, Peter T.; Tyack, Peter L.; Wahlberg, Magnus. |
| Porpoise echolocation has been studied previously, mainly in target detection experiments using stationed animals and steel sphere targets, but little is known about the acoustic behaviour of free-swimming porpoises echolocating for prey. Here, we used small onboard sound and orientation recording tags to study the echolocation behaviour of free-swimming trained porpoises as they caught dead, freely drifting fish. We analysed porpoise echolocation behaviour leading up to and following prey capture events, including variability in echolocation in response to vision restriction, prey species, and individual porpoise tested. The porpoises produced echolocation clicks as they searched for the fish, followed by fast-repetition-rate clicks (echolocation buzzes)... |
| Tipo: Text |
Palavras-chave: Echolocation; Porpoise; Foraging; Buzz; Biosonar; Phocoena. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00000/11111/8969.pdf |
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| Mattos,I.M. de; Souza,J.; Soares,A.E.E.. |
| ABSTRACT Pollination services performed by bees are essential for the reproduction of a great part of flowering plants. The pollen collected by Apis mellifera while performing pollination (bee pollen), has been incorporated into the human diet for its favorable nutritional components. Around 1,500 tons of bee pollen are produced annually worldwide, especially in Spain, China, Australia, Argentina, and Brazil. Despite the importance of bee pollen within apiculture, little is known about the effects of climate variations on bee pollen collection and production. We monitored the pollen collection performance of 24 different honey bee colonies in different climate conditions within a period of one year. We then analyzed the statistical interaction among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Africanized honey bees; Bee pollen; Climate; Foraging; Pollination. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000401301 |
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| Spier, Manuelly Sartori; Spier, Edson Fernando; Dalavéquia, Máira Aparecida; Favretto, Mario Arthur. |
| Resumo. Entre as espécies de formigas economicamente importantes, devido aos danos que muitas vezes causam à agricultura, as mais significativas são as formigas-cortadeiras por possuírem o hábito de cortar e transportar fragmentos vegetais diversos para os seus ninhos subterrâneos. O objetivo deste estudo foi caracterizar alguns aspectos ecológicos de Atta sexdens piriventris Santschi no município de Capinzal, estado de Santa Catarina, Sul do Brasil. O material de origem vegetal transportado pelas formigas apresentou como característica folhas verdes/frescas 57%, folhas secas 23%, pedaços de frutos 7%, sementes 7% e flores 3%. Já os de origem animal tiveram uma representação de 3%, e eram compostos por pedaços de insetos. A média de distância percorrida... |
| Tipo: Article |
Palavras-chave: Forrageio; Myrmicinae; Ninhos; Substratos; Foraging; Nests; Substrates. |
| Ano: 2013 |
URL: http://hdl.handle.net/2315/267 |
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| Pick,Raquel A.; Blochtein,Betina. |
| Four colonies of Plebeia saiqui (Holmberg, 1903), of São Francisco de Paula, were studied during the period from October/1998 to October/1999. The counting of the bees was proceeded monthly, differentiated workers that came back with and without pollen in the corbicula. Grains of pollen of pots previously marked were collected monthly and identified. The percentage of the pollen types of the samples was estimated: 20% of Asteraceae, 17% Myrtaceae, 15% type Meliaceae and 10% Euphorbiaceae. The remaining corresponds to other pollen types of small representation, besides those the were no identified. The climatic influence on the pollen collection was analyzed being used simple and multiple regressions. It was verified that in the spring and in the summer the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plebeia; Stingless bees; Pollen analysis; Foraging; Climatic influence. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000100025 |
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| Uiblein, F; Lorance, Pascal; Latrouite, Daniel. |
| Much is known in very broad terms about the distribution of deep-sea fishes, but information on fine-scale habitat selection and behaviour in the largest living space on earth is still rare. Based on video sequences from 4 dives performed with the manned submersible 'Nautile' at depths between 400 and 2000 in in the Bay of Biscay, NE Atlantic, we studied the behaviour of co-occurring slope-dwelling deep-sea fishes. Five different habitats were identified according to depth range or topographical and hydrological characteristics. For each fish species or genus that could be identified, estimates of absolute abundance were provided. The most frequently occurring species, round-nose grenadier Coryphaenoides rupestris, blackmouth catshark Galeus melastomus,... |
| Tipo: Text |
Palavras-chave: Submersible observations; Assemblage structure; Density; Locomotion; Vertical positioning; Foraging; Species specific; Behavioural flexibility. |
| Ano: 2003 |
URL: https://archimer.ifremer.fr/doc/00000/10666/7591.pdf |
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| Azeredo,Luane Maria Melo; Ximenes,Monique Silva; Pereira,Kleytone Alves; Fracasso,Maria Paula Aguiar; Lopez,Luiz Carlos Serramo. |
| ABSTRACT Body condition is an important measure to estimate the energy reserve of an organism. Scientists frequently use body condition indices (BCIs) with morphometric measures but direct measurements, such as blood glucose, seem to be more reliable. We observed oscillations in the body condition and glucose indexes of individuals of Artibeus planirostris (Spix, 1823) during 13 nights in the field. We assume that if glucose levels are proportional to feeding state and body condition is a measure of energy reserve, blood glucose and BCI should be positively correlated and both are expected to increase during the night as the bats leave their diurnal roost to feed. To test this, we examined the relationship between blood glucose levels, BCI and reproductive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body condition; Blood metabolites; Foraging. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100310 |
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| Hilário,Sergio D.; Ribeiro,Márcia de F.; Imperatriz-Fonseca,Vera L.. |
| Flight activity of foragers of four colonies of Plebeia remota (Holmberg, 1903) was registered from December 1998 to December 1999, using an automated system (photocells and PLC system). The colonies originated from two different regions: Cunha, state of São Paulo, and Prudentópolis, state of Paraná, Brazil. Flight activity was influenced by different climatic factors in each season. In the summer, the intensity of the correlations between flight activity and climatic factors was smaller than in the other seasons. During the autumn and winter, solar radiation was the factor that most influenced flight activity, while in the spring, this activity was influenced mainly by temperature. Except in the summer, the various climatic factors similarly influenced... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stingless bees; Foraging; Climatic factors; Seasonality; Geographic distribution. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000300004 |
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| Jolivet, Aurelie; Chauvaud, Laurent; Thebault, Julien; Robson, Anthony A.; Dumas, Pascal; Amos, George; Lorrain, Anne. |
| Background : Behaviour and time spent active and inactive are key factors in animal ecology, with important consequences for bioenergetics. For the first time, here, we equipped the gastropod Tectus (= Trochus) niloticus with accelerometers to describe activity rhythms at two sites in the Southwest Pacific with different temperature regimes: New Caledonia and Vanuatu. Results : Based on a 24-hour cycle, T. niloticus activity began at dusk and gradually stopped during the night, before sunrise. This nocturnal behaviour was characterised by short (duration <30 s), low intensity (acceleration < 0.12 ɡ) movements and was probably associated with foraging behaviour. We assumed that activity ceased once the animal was satiated. Our analysis of two size... |
| Tipo: Text |
Palavras-chave: Activity; Accelerometry; 24-hour periodicity; Tectus niloticus; Foraging; Migration. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00295/40658/39640.pdf |
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| Souza, Darclet Terezinha Malerbo; Centro Universitário Moura Lacerda; Silva, Flávio Augusto Santos; Centro Universitário Moura Lacerda. |
| O objetivo deste experimento foi estudar o comportamento forrageiro das abelhas africanizadas Apis mellifera, no decorrer do ano. As coletas foram realizadas na área experimental do Centro Universitário Moura Lacerda, Ribeirão Preto, Estado de São Paulo. Uma vez por mês, durante 12 meses, era realizada uma avaliação da atividade de coleta dessas abelhas anotando-se, das 7h às 18h, 10 min. em cada horário, o número de abelhas que entrava na colmeia carregando pólen ou néctar, com cinco repetições por mês. As abelhas A. mellifera coletaram néctar durante todo o dia aumentando sua frequência até às 12h, e para pólen, essas abelhas preferiram o período da manhã, até as 11h. Concluiu-se que não houve diferença significativa tanto para coleta de néctar quanto... |
| Tipo: Pesquisa experimental |
Palavras-chave: 5.04.01.00-9 Apis mellifera; Fatores climáticos; Forrageamento; Néctar; Pólen Ecologia dos Animais Domésticos e Etologia Apis mellifera; Climatic factors; Foraging; Nectar; Pollen. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/9252 |
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| Silva,Samuel Elias; Assunção,Wilhan R. C.; Duca,Charles; Penha,Jerry. |
| The combined demand over a certain resource may exceed its immediate supply, which can then lead to competition between individuals. This competition may result in territorial behavior. In this study we determine the density and spatial distribution, describe the interactions arising from territorial behavior and evaluate the costs of keeping the territories defended by adults of Parodon nasus. The study was conducted in Camarinha Stream located in the Serra das Araras Ecological Station, Porto Estrela, State of Mato Grosso, Brazil. The density was constant throughout the length of the stream, with a mean (± standard deviation) of 1.01 ind./m² (± 0.14). Our results show that the spatial distribution of individuals in the area ranged between uniform and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spatial distribution; Territory size; Foraging; Resting time; Territory defense. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400017 |
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| KENAGY,G.J.; NESPOLO,ROBERTO F.; VÁSQUEZ,RODRIGO A.; BOZINOVIC,FRANCISCO. |
| We present an analysis of behavioral flexibility in a day-active caviomorph rodent, the degu, Octodon degus, in response to temporal (daily and seasonal), spatial, and thermal heterogeneity of its environment. We quantified activity and foraging behavior in a population, together with thermal conditions, in an open habitat in the seasonally hot and arid matorral of central Chile. Summer activity was bimodal, with a gap of more than 8 h between the morning bout of 2.5 h of intensive foraging and the afternoon bout of 2 h. More than half of the 4.5 h of summer activity occurred in the shade of early morning or late afternoon when the sun was below the local skyline. Autumn and spring activity were also bimodal, but with greater proportions of activity under... |
| Tipo: Journal article |
Palavras-chave: Foraging; Seasonality; Thermal ecology; Forrajeo. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000300008 |
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| Chen, W.-M.; Lee , Y.-F.; Tsai, C.-F.; Yao, C.-T.; Chen, Y.-H.; Li, S.-H.; Kuo, Y.-M.. |
| Many birds in breeding seasons engage in vigorous dawn singing that often turns to a prominent chorus. We examined dawn chorus variation of avian assemblages in a tropical montane forest in Taiwan and tested the hypothesis that onset sequence is affected by eye sizes, foraging heights, and diet of birds. Chorus onset and duration varied between sampling months, but generally peaked in the prime breeding season. Overall dawn chorus length increased with, but mean duration per species was negatively correlated with, species richness. The inter-correlation among trait variables in phylogenetic independent contrasts was calculated and examined. Both foraging height and relative eye size were selected as positively explanatory factors, but no dietary effects... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Breeding; Canopy; Diets; Eye size; Foraging; Perch; Taiwan; Tropical forests; Birds; 42.83; 42.62. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/578950 |
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| Fontoura,Pedro Luiz; Ribeiro,Luiz Fernando; Pie,Marcio Roberto. |
| Saddleback toads (Brachycephalidae: Brachycephalus) are a remarkable group of highly endemic species from the southern Atlantic Rainforest of Brazil. They are brightly colored, diurnal, minute frogs that live in the leaf litter of high-elevation cloud forests. Little is known about the natural history of these frogs, particularly their diet. In the present study we provide the first published account of a Brachycephalus species diet. Specimens of Brachycephalus brunneus Ribeiro, Alves, Haddad & Reis, 2005 (N = 20) were collected from two locations in the Serra do Mar mountain range in the state of Paraná, southern Brazil. A total of 137 food items were recorded, with Acari being the most common item (62.4%). This prevalence is much higher than the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acari; Feeding; Foraging; Litter frog. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500019 |
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| Kappes, H.; Stoll, S.; Haase, P.. |
| Dispersal is a crucial process for population exchange and expansion, and traits that facilitate dispersal may be positively selected during biological invasions. Here, we performed a basic study on differences in behavior between the slug Arion lusitanicus auct. non Mabille, 1868 (Gastropoda: Pulmonata), which is considered to be one of the 100 worst invasive species in Europe, and native gastropods. We assumed that the species is more active and less sensitive to otherwise aversive stimuli, and thus more likely to utilize novel environments. We quantified field densities and performed pitfall trap studies in 15 differently-structured habitats (urban, grassland, succession, riverine forest) in the floodplain of the LTER (Long Term Ecological Research)... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Behavioral ecology; Non-native organisms; Dietary conservatism; Foraging; Trap efficiency; 42.73. |
| Ano: 2012 |
URL: http://www.repository.naturalis.nl/record/421027 |
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| Giesel, Alexandre; Boff, Mari Carissimi; Boff, Pedro. |
| High dilutions may have different biological effects due to the dynamization method and the dilution order used. The aim of this paper was to evaluate the foraging activity of the leafcutter ant Acromyrmex laticeps subjected to high dilution preparations originating from grinding worker ants and developing dilutions at the following dynamizations: 6, 12, and 30 CH (centesimal Hahnemannian dilution order), 5 LM (fifty millesimal Hahnemannian dilution order) and 35 K (Korsakovian dilution order). The preparations were applied daily for 10 days by spraying them on moving ants on tracks close to the anthill. The evaluations included counting the number of ants transporting vegetable fragments on the tracks before each application, after application, and 20 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Foraging; Non-residual therapies; High dilutions; Nosodes.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32848 |
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| Registros recuperados: 43 | |
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