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| Registros recuperados: 43 | |
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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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| 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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| Zortéa,Marlon; Silva,Diego A.; Calaça,Analice M.. |
| ABSTRACT Desmodus rotundus (É. Geoffroy, 1810) feeds preferably on mammal blood, including livestock animals, such as bovine cattle. In spite of using native preys in the wild, records of this feeding activity are scarce. In the present study, we investigated the foraging activity of D. rotundus based on video footage from camera traps in Atlantic Forest fragments in southern Goiás State, Brazil. Out of 23 mammal species recorded in the study area, four had interactions with Desmodus rotundus (Priodontes maximus, Tapirus terrestris, Mazama americana and Pecari tajacu). The records were obtained from early night to sunrise. There was a correlation between abundance of potential preys and the choice of the target by D. rotundus. Most of the bat-prey... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chiroptera; Foraging; Mammals. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100237 |
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| Rodrigues,Larissa R.; Góes,João M. de; Silva,Thiago E. da; Teixeira,Gustavo M.; Andrade,Luciana S. de; Fransozo,Adilson. |
| ABSTRACT The rocky shores of Praia Grande, in Ubatuba (São Paulo, Brazil), are formed by rock and Sabellaridae polychaete sandy reefs. These microenvironments offer shelters and foraging areas for several marine organisms and attracts many tourists. The crab Eriphia gonagra (Fabricius, 1781) inhabits these structures and can be used as a bioindicator, since they may be affected by anthropogenic actions. This study evaluated the stomach contents and characterized the feeding habits of an E. gonagra population, inhabiting the rocky shores from Praia Grande, taking into account the sex, size, and microhabitat. Monthly samplings were performed in 1996 and 1997 and the crabs were manually captured on the rocky surface or into of the sand reefs. So, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phragmatopoma sp.; Foraging; Crustacea; Brachyura; Food selection. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100213 |
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| Lima,Tatiane N.. |
| ABSTRACT Antlion larvae of Myrmeleon brasiliensis (Návas, 1914) build their traps in a microenvironment with protection from the direct action of rain and other perturbations as well as microhabitats that are less protected from disturbances that can destroy the traps. Differences in microhabitats may affect the characteristics of the trap-building process due the high energy expenditure exerted in building and maintaining these traps, which led to the following question: Do antlion larvae of M. brasiliensis build larger traps in protected microhabitats? Considering the occurrence of M. brasiliensis larvae in two microhabitats and the measurements of the size of the larvae and their traps, the hypothesis was that larvae would occur in greater abundance and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antlion; Disturbance; Foraging; Traps. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100215 |
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| Marchal, Paul; Poos, Jan-jaap; Quirijns, Floor. |
| This study has investigated some properties of fishermen's foraging, using Levy flights theory. The case studies examined were a selection of North Sea Dutch and French vessels, for which catch and effort data were collected on a haul-by-haul basis. Foraging behavior could reasonably be represented by a Levy flight process, characterized by an exponentiation factor mu, for both fleets. The properties of fishers' foraging were further investigated for the Dutch fleet using time series analysis. Optimal foraging was found with mu = 1.5, suggesting a slow recovery dynamics of the stocks being harvested. Efficient foraging led to high value per unit effort, while the knowledge of fishing grounds with high stock density is shown to increase foraging efficiency... |
| Tipo: Text |
Palavras-chave: Haul by haul data; Foraging; Fishing effort; Levy flights; Fleet behavior. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2314.pdf |
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| Guinet, Christophe; Dubroca, L; Lea, Ma; Goldsworthy, S; Cherel, Yan; Duhamel, Guy; Bonadonna, F; Donnay, Jp. |
| The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (49 degrees 07 'S, 70 degrees 45 'E), Kerguelen Island in February 1998. Eleven females were fitted with a satellite transmitter and time-depth recorder. The 2 data sets were combined in order to locate diving activity of the seals. The occurrence of fish in the diet of the seals was investigated by the identification of otoliths in 55 scats collected at the breeding colony during the study period. Oceanographic variables were measured simultaneously by direct sampling and satellite remote sensing. The mesopelagic fish community was sampled at 20 stations along 4 transects, where epipelagic trawls were conducted at night at 50 ni depth. We then investigated,... |
| Tipo: Text |
Palavras-chave: Antarctic fur seal; Diet; Oceanographic conditions; Foraging; Geographic information system. |
| Ano: 2001 |
URL: https://archimer.ifremer.fr/doc/00247/35843/34354.pdf |
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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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| Ravache, Andreas; Bourgeois, Karen; Thibault, Martin; Dromzée, Sylvain; Weimerskirch, Henri; De Grissac, Sophie; Prudor, Aurélien; Lorrain, Anne; Menkes, Christophe; Allain, Valerie; Bustamante, Paco; Letourneur, Yves; Vidal, Eric. |
| Lunar phase and illumination are known to affect nocturnal behavior of many organisms, particularly through predator-prey interactions. Visual predators can benefit from higher light levels to increase their activity, while prey may decrease their activity to avoid predation. The lower number of nocturnal seabirds observed on colonies during full moon nights has been mostly interpreted as a predation avoidance strategy. However, it is also possible that shearwaters take advantage of the moon's illumination to feed also at night, and stay at sea to forage during full moon nights. We used miniaturized GPS-loggers to obtain 179 tracks from 99 wedge-tailed shearwaters breeding in New Caledonia, to investigate moonlight effects on individual behavior. Lunar... |
| Tipo: Text |
Palavras-chave: Ardenna pacifica; Foraging; Lunar phase; Moon; GPS-tracking; Stable isotope analyses. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00607/71880/70608.pdf |
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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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| Paredes, Rosana; Orben, Rachael A.; Roby, Daniel D.; Irons, David B.; Young, Rebecca; Renner, Heather; Tremblay, Yann; Will, Alexis; Harding, Ann M. A.; Kitaysky, Alexander S.. |
| Causes and consequences of differences in seabird foraging strategies between breeding colonies are not well understood. We tested whether body size of a pursuit-diving seabird, the thick-billed murre Uria lomvia, differs between breeding colonies and, if so, how size differences can be understood in the context of differences in foraging behavior, habitat use, and breeding performance. We measured adult murres over 3 seasons (2008 to 2010) at 2 of the Pribilof Islands, St. Paul and St. George, located on the continental shelf of the Bering Sea at different distances from the shelf break. Body mass and size were positively associated with deep diving and negatively associated with long flights, suggesting morphology influences foraging and commuting... |
| Tipo: Text |
Palavras-chave: Body size; Foraging; Diving; Marine habitats; Stress levels; Bering Sea; Murres; Seabirds. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00626/73837/73678.pdf |
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| Heerah, Karine; Cox, Samantha; Blevin, Pierre; Guinet, Christophe; Charrassin, Jean-benoît. |
| Dive data collected from archival and satellite tags can provide valuable information on foraging activity via the characterization of movement patterns (e.g., wiggles, hunting time). However, a lack of validation limits interpretation of what these metrics truly represent in terms of behavior and how predators interact with prey. Head-mounted accelerometers have proven to be effective for detecting prey catch attempt (PrCA) behaviors, and thus can provide a more direct measure of foraging activity. However, device retrieval is typically required to access the high-resolution data they record, restricting use to animals returning to predictable locations. In this study, we present and validate data obtained from newly developed satellite-relay data tags,... |
| Tipo: Text |
Palavras-chave: Satellite relayed data logger; Accelerometers; Diving behavior; Movement ecology; Foraging; Sea-ice; Biologging. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00595/70687/68895.pdf |
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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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| Lea, Mary-anne; Guinet, Christophe; Cherel, Yves; Duhamel, Guy; Dubroca, Laurent; Pruvost, Patrice; Hindell, Mark. |
| The large temporal and spatial variability in marine productivity encountered by marine predators may negatively influence breeding success. The Antarctic fur seal Arctocephalus gazella (AFS), a marine predator in the Southern Ocean (SO) ecosystem with a circumpolar distribution, exhibits a short, 4 mo lactation coinciding with increased summer marine productivity. The diet of AFS, and the distance to significant and productive oceanographic features, such as the Antarctic Polar Frontal Zone (PFZ), varies considerably between populations. We studied the foraging activity, foraging efficiency and the pup provisioning strategies of lactating AFS at a key breeding site in the southern Indian Ocean, the Kerguelen Archipelago. Foraging parameters were examined... |
| Tipo: Text |
Palavras-chave: Antarctic fur seal; Polar front; Pinniped; ENSO; Foraging; Growth; Diving; Seabird; Myctophid; Maternal care. |
| Ano: 2006 |
URL: https://archimer.ifremer.fr/doc/00247/35847/34356.pdf |
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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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| 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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| 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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| Kovacs, Sandor; Ertsey, Imre; Balogh, Peter. |
| In order to analyse risks and to choose from different decision-making strategies simulation models are often applied in several areas of animal breeding. We developed an improved Monte Carlo model for analysing laying hen breeding combined with Bayes statistics. On the basis of data from a company breeding broiler parents, our paper examines the technological and economic risks of breeding a laying-hen stock with a simulation program developed by our team. During modelling we take individual cost elements and the most significant factors (different forage costs, price of sold eggs, unsuitable eggs, installing day-old chicks and old animals) affecting returns into consideration. The results can be presented in tables and graphs for both sexes as well.... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Monte Carlo; Risk analysis; Chicken production; Bayessian statistics; Foraging; Livestock Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/7798 |
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| Bernardino,André Sarlo; Gaglianone,Maria Cristina. |
| This paper aims to study the distribution of natural nests of Xylocopa ordinaria and characterize its nesting habits in the restinga of Grussai/Iquipari (RJ), supporting future studies on the pollinators management in the northern Rio de Janeiro state. The data obtained from Aug/2003 to Dec/2004, in an area of 11.6ha, were related to the nest distribution, substrate identification and dimensions, emergence, sex ratio, nest structure (n= 23 nests) and pollen content analysis of provisioning masses and feces. X. ordinaria nests were abundant and presented a clustered distribution. These bees do not present taxonomical affinity for nesting substrates, but preferences for wood availability and characteristics, being Pera glabrata the main substrate. X.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavior; Foraging; Native bees; Spatial distribution; Xylocopini. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000300017 |
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| Registros recuperados: 43 | |
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