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Registros recuperados: 10
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A state-space model to derive bluefin tuna movement and habitat from archival tags ArchiMer
Royer, Francois; Fromentin, Jean-marc; Gaspar, P.
Archival tagging provides a unique way to study the spatial dynamics and habitat of pelagic fish. This technique generates lagrangian data of a particular type in marine ecology: although highly informative about processes at different scales (e.g. horizontal movements versus diving behaviour), such data are impaired by location errors and the lack of combination with actual environmental variability. The present paper introduces a framework for modelling bluefin tuna movement in relation to its habitat, using records of light, depth and temperature from archival tags. Based on data assimilation concepts and methods, we show how an explicit formulation of the observation process and the statistics of external variables (e.g. ambient temperature) can...
Tipo: Text Palavras-chave: Tag; Archival; Habitat; Movement; Bluefin tuna.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-671.pdf
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Behavioral Responses of Northern Leopard Frogs (Rana pipiens) to Roads and Traffic: Implications for Population Persistence Ecology and Society
Bouchard, Julie; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; julie.bouchard@mail.mcgill.ca; Ford, Adam T.; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; atford@gmail.com; Eigenbrod, Felix E; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; felix.eigenbrod@gmail.com; Fahrig, Lenore; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; lenore_fahrig@carleton.ca.
Tipo: Peer-Reviewed Reports Palavras-chave: Breeding dispersal; Habitat fragmentation; Highway; Migration; Movement; Road avoidance; Road mortality.
Ano: 2009
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Efeito da caça no movimento e na área de uso dos jacarés, Pantanal Sul. Infoteca-e
CAMPOS, Z.; COUTINHO, M.; MOURÃO, G.; MAGNUSSON, W..
Na década de 80, a caça ilegal predominava no Pantanal, principalmente na área de rios, onde muitos jacarés foram mortos e suas carcaças encontradas em acampamentos dentro dos capões de mata. Caçadores mataram sete machos marcados que saíram da área de lagos para os rios. Na área de rios, as áreas usadas pelos cinco machos em locais não-sujeitos à caça. similares das usadas, pelos outros cinco machos em locais não -sujeitos à caça. O movimento de indivíduos de área não caçadas poe ser especialmente importante para o recrutamento de indivíduos à população em áreas caçadas, em longo prazo.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Caça clandestina; Jacaré-do-Pantanal; Movement; Harvest; Management.; Manejo; Movimento.; Caiman; Pantanal..
Ano: 2005 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/812028
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Effects of physical exercise on skeletal muscles of rats with cerebral ischemia BJMBR
Melo,R.T.R.; Damázio,L.C.M.; Lima,M.C.; Pereira,V.G.; Okano,B.S.; Monteiro,B.S.; Natali,A.J.; Carlo,R.J. Del; Maldonado,I.R.S.C..
Physical exercise is a known preventive and therapeutic alternative for several cerebrovascular diseases. Therefore, the objective of the present study was to evaluate the motor performance and histomorphometry of the biceps brachii, soleus, and tibialis anterior muscles of rats submitted to a treadmill training program prior to the induction of cerebral ischemia via occlusion of the middle cerebral artery (OMCA). A total of 24 Wistar rats were distributed into four groups: Sham-Sed: sedentary control animals (n=6), who underwent sham surgery (in which OMCA did not occur); Sham+Ex: control animals exercised before the sham surgery (n=6); I-Sed: sedentary animals with cerebral ischemia (n=6); and I+Ex: animals exercised before the induction of ischemia...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Muscles; Cerebral ischemia; Exercise; Movement; Rats; Atrophy.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019001200607
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Mechanisms Affecting Population Density in Fragmented Habitat Ecology and Society
Tischendorf, Lutz; ELUTIS Modelling and Consulting Inc.; lutz.tischendorf@gmx.net; Grez, Audrey; Universidad de Chile; agrez@uchile.cl; Fahrig, Lenore; Carleton University; lfahrig@ccs.carleton.ca.
We conducted a factorial simulation experiment to analyze the relative importance of movement pattern, boundary-crossing probability, and mortality in habitat and matrix on population density, and its dependency on habitat fragmentation, as well as inter-patch distance. We also examined how the initial response of a species to a fragmentation event may affect our observations of population density in post-fragmentation experiments. We found that the boundary-crossing probability from habitat to matrix, which partly determines the emigration rate, is the most important determinant for population density within habitat patches. The probability of crossing a boundary from matrix to habitat had a weaker, but positive, effect on population density. Movement...
Tipo: Peer-Reviewed Reports Palavras-chave: Boundary crossing; Emigration; Habitat fragmentation; Immigration; Modeling; Movement; Population density; Simulation; Time scale.
Ano: 2005
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Modeling the emergence of migratory corridors and foraging hot spots of the green sea turtle ArchiMer
Dalleau, Mayeul; Kramer‐schadt, Stephanie; Gangat, Yassine; Bourjea, Jerome; Lajoie, Gilles; Grimm, Volker.
Environmental factors shape the spatial distribution and dynamics of populations. Understanding how these factors interact with movement behavior is critical for efficient conservation, in particular for migratory species. Adult female green sea turtles, Chelonia mydas, migrate between foraging and nesting sites that are generally separated by thousands of kilometers. As an emblematic endangered species, green turtles have been intensively studied, with a focus on nesting, migration, and foraging. Nevertheless, few attempts integrated these behaviors and their trade‐offs by considering the spatial configurations of foraging and nesting grounds as well as environmental heterogeneity like oceanic currents and food distribution. We developed an...
Tipo: Text Palavras-chave: Connectivity; Corridors; Individual-based model; Migration; Movement; Sea turtle.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00512/62337/66597.pdf
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PIT telemetry as a method to study the habitat requirements of fish populations: application to native and stocked trout movements IPB - Escola Superior Agrária
Teixeira, Amílcar; Cortes, R..
Passive integrated transponder (PIT) technology was used to study the behaviour of fishes during the summer season in two headwater streams of northeastern Portugal. A total of 71 PIT tags (12 mm long x 2.1 mm diameter) were surgically implanted in 1+ stocked (39) and native (32) brown trout of two size classes (< 20.0 and ≥ 20.0 cm). Eight independent antennae, connected to a multi-point decoder (MPD reader) unit, were placed in different microhabitats, selected randomly every three days during the observation period (29 August to 9 September in Baceiro stream and 19 September to 4 October in Sabor stream). The results confirmed this method as a suitable labour efficient tool to assess the movement and habitat use of sympatric stocked and native trout...
Tipo: Article Palavras-chave: PIT tag; Brown trout; Stocking; Habitat use; Movement.
Ano: 2007 URL: http://hdl.handle.net/10198/984
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Pit telemetry as a method to study the habitat requirements of fish populations. Application to native and stocked trout movements IPB - Escola Superior Agrária
Teixeira, Amílcar; Cortes, R..
Passive integrated transponder (PIT) technology was used to study the behaviour of fishes during the summer season in two headwater streams of northeastern Portugal. A total of 71 PIT tags (12 mm long x 2.1 mm diameter) were surgically implanted in 1+ stocked (39) and native (32) brown trout of two size classes (< 20.0 and ≥ 20.0 cm). Eight independent antennae, connected to a multi-point decoder (MPD reader) unit, were placed in different microhabitats, selected randomly every three days during the observation period (29 August to 9 September in Baceiro stream and 19 September to 4 October in Sabor stream). The results confirmed this method as a suitable labour efficient tool to assess the movement and habitat use of sympatric stocked and native trout...
Tipo: ConferenceObject Palavras-chave: PIT tag; Brown trout; Stocking; Habitat use; Movement.
Ano: 2005 URL: http://hdl.handle.net/10198/5301
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Variación temporal de la comunidad de peces en un canal de comunicación al mar en Cayo Coco, Cuba OceanDocs
Salvat-Torres, H. M.; González-Sansón, G.; Salvat Quesada, M.; Pina-Amargós, F..
Este trabajo analiza como varía en el tiempo la abundancia y distribución de los peces del canal de comunicación al mar de Laguna Larga, Cayo Coco, Cuba. El canal se dividió en dos zonas separadas cada una por 30 m. Se realizaron censos visuales mediante buceo libre, consignándose la abundancia, talla y anotaciones sobre la conducta de peces en tres años. Se cuantificó el número de individuos y la talla estimada de peces por especies. Para caracterizar el hábitat se midió el área de sombra y refugio del canal. Se calculó la densidad, talla media, biomasa y la frecuencia relativa de la ictiofauna. Se determinaron 52 especies pertenecientes a 24 familias de peces. Las comunidades de peces del canal estudiado varían espacial y temporalmente. La...
Tipo: Journal Contribution Palavras-chave: Mangroves; Movement; Fish; Temporal variations.
Ano: 2013 URL: http://hdl.handle.net/1834/4930
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Winter Responses of Forest Birds to Habitat Corridors and Gaps Ecology and Society
St. Clair, Colleen Cassady; University of Alberta; cstclair@ualberta.ca; Hannon, Susan; University of Alberta; Sue.Hannon@ualberta.ca.
Forest fragmentation and habitat loss may disrupt the movement or dispersal of forest-dwelling birds. Despite much interest in the severity of these effects and ways of mitigating them, little is known about actual movement patterns in different habitat types. We studied the movement of wintering resident birds, lured by playbacks of mobbing calls, to compare the willingness of forest birds to travel various distances in continuous forest, along narrow corridors (fencerows), and across gaps in forest cover. We also quantified the willingness of Black-capped Chickadees (Poecile atricapillus) to cross gaps when alternative forested detour routes were available. All species were less likely to respond to the calls as distance increased to 200 m, although...
Tipo: Peer-Reviewed Reports Palavras-chave: Black-capped Chickadee; Corridor; Detour trials; Dispersal; Downy Woodpecker; Forest fragmentation; Gap width; Hairy Woodpecker; Movement; Poecile atricapillus; Picoides pubescens; Picoides villosus; Sitta carolinensis; White-breasted Nuthatch..
Ano: 1998
Registros recuperados: 10
Primeira ... 1 ... Última
 

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