Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Ecology and Society (3) ArchiMer (1) R. Bras. Zootec. (1) RChHN (1) Autor GARCÍA,MATÍAS (1) Harron, Donald E.; ; dharron@skyweb.ca (1) Jensen, Per Moestrup; Royal Veterinary and Agricultural University; pmj@kvl.dk (1) Lusseau, David; University of Aberdeen; d.lusseau@abdn.ac.uk (1) MANGIONE,ANTONIO M (1) MEDINA,ANA I (1) Muniz,Andreissi Mileski (1) Scheffer-Basso,Simone Meredith (1) Schmidt, Niels Martin; Royal Veterinary and Agricultural University; nms@kvl.dk (1) Simard, Yvan (1) Sourisseau, Marc (1) Mais... Palavra-chave Avoidance (6) ABT 805 (1) Acromyrmex lobicornis (1) Alfagraze (1) Aves (1) Behavioral budget (1) Boat-dolphin interactions (1) Boats (1) Body length (1) Bottlenose dolphin (1) Choice food (1) Competition (1) Crioula (1) Diel vertical migration (1) Feeding (1) Feeding category (1) Habitat fragmentation (1) Impact assessment (1) In situ orientation (1) Island biogeography (1) Mais... Tipo do documento Peer-Reviewed Reports (2) Info:eu-repo/semantics/article (1) Journal article (1) Peer-Reviewed Response (1) Text (1) Ano 2012 (1) 2010 (1) 2009 (1) 2007 (1) 2005 (1) 2004 (1) Mais... País Canada (3) Brazil (1) Chile (1) France (1) Idioma Inglês (6)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 6 Primeira ... 1 ... Última Assumptive Error and Overestimation of Effects in Wildlife Model Output Ecology and Society Harron, Donald E.; ; dharron@skyweb.ca. Tipo: Peer-Reviewed Response Palavras-chave: Avoidance; Seismic line; Wildlife model; Woodland caribou. Ano: 2007 Concomitant Patterns in Avian and Mammalian Body Length Changes in Denmark Ecology and Society Schmidt, Niels Martin; Royal Veterinary and Agricultural University; nms@kvl.dk; Jensen, Per Moestrup; Royal Veterinary and Agricultural University; pmj@kvl.dk. We gathered length data on 61 Danish breeding birds from the past 200 years, and related the pattern of change to present body mass and other ecological parameters. Body mass was the only parameter significantly correlated with the rate of change, and the emerging pattern in the rate of change followed the island rule. That is, smaller species have become larger and vice versa, while the medium-sized species remain essentially unchanged. The suggested optimal body mass was around 85 g. Though orders of magnitude lower, the pattern in avian body size change was similar to that of Danish mammals. Our analyses suggest that increasing habitat fragmentation leads to altered body size towards being medium-sized in Danish vertebrates. The changing landscape,... Tipo: Peer-Reviewed Reports Palavras-chave: Body length; Habitat fragmentation; Island biogeography; Island rule; Aves; Reproductive output; Migration; Feeding category; Competition; Avoidance; Tolerance.. Ano: 2005 Diel changes in acoustic and catch estimates of krill biomass ArchiMer Simard, Yvan; Sourisseau, Marc. Krill-biomass estimates can be compromised by diel variabilities in acoustic backscatter and the catch efficiencies of various nets. This paper describes an effort to quantify these variabilities at fine temporal and spatial scales during a three-day experiment at a fixed location, using high-resolution, stratified Bioness samples and echo-integration, and assuming a fixed distribution of krill orientations. Night-time catches in the krill scattering layer (SL) were 15 times the acoustic estimates. The situation was reversed during daytime, when the acoustic estimates in the SL were 5 times larger than the catches. This collectively resulted in a ±10-dB gradual diel cycle in the difference of vertically integrated biomass from both sampling methods. Use of... Tipo: Text Palavras-chave: Thysanoessa raschi; Target strength; Strobe light; St Lawrence Estuary; Meganyctiphanes norvegica; Krill; In situ orientation; Feeding; Diel vertical migration; Avoidance. Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6591.pdf Exposure to creosote bush phenolic resin causes avoidance in the leaf-cutting ant Acromyrmex lobicornis (Formicidae: Attini) RChHN MEDINA,ANA I; MANGIONE,ANTONIO M; GARCÍA,MATÍAS. We focused our study on the effects of Larrea cuneifolia phenolic resin on leaf-cutting ants from two populations (Sierra de las Quijadas National Park and San Roque) of Acromyrmex lobicornis in San Luis, Argentina. We conducted two bioassays of food choice (field and laboratory) to compare the effects of phenolic resin on ant workers from these two populations. Results of the field experiment indicated that there were no differences in preference for either leaves treated with resin or untreated leaves among colonies from both localities. However, results of the laboratory experiments with individual ants indicated a significant effect of population and treatment on the time spent in different treatments. While leaf-cutting individual workers from... Tipo: Journal article Palavras-chave: Acromyrmex lobicornis; Avoidance; Choice food; Preference; San Luis-Argentina. Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000200007 Grazing resistance mechanisms in alfalfas of different aptitude in the juvenile stage R. Bras. Zootec. Scheffer-Basso,Simone Meredith; Muniz,Andreissi Mileski. This study aimed at verifying whether juvenile plants of alfalfa cultivars with different aptitude (grazingtype: Alfagraze and ABT 805; hay-type: Crioula) show morphophysiological differences in order to develop a protocol for early selection for grazing persistence. Two experiments were conducted in a greenhouse, in completely randomized design and three repeplicates. In Experiment 1, plants were evaluated from successive destructive harvests at 60, 90, 120 and 150 days of age. In Experiment 2, plants at 150 days of age were cut to a 10-cm stubble and harvested at 15 and 30 days of regrowth. In Experiment 1, Alfagraze showed the lowest height (19 cm), internode length (1.4 cm) and apical bud accessibility (15.3 cm). Grazing-type cultivars did not differ... Tipo: Info:eu-repo/semantics/article Palavras-chave: ABT 805; Alfagraze; Avoidance; Crioula; Tolerance. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000800009 The Hidden Cost of Tourism: Detecting Long-term Effects of Tourism Using Behavioral Information Ecology and Society Lusseau, David; University of Aberdeen; d.lusseau@abdn.ac.uk. Increasingly, whales and dolphins are the focus of tourism activities in many coastal locations. Although these activities can affect individuals and populations of cetaceans, the biological significance and hence the cost of these impacts are as yet largely unknown. This study assessed the effects of boat interactions on the behavioral budget of two populations of bottlenose dolphins (Tersiops truncatus) living in similar fjords but exposed to different levels of tourism activities. This comparison makes it possible to assess the costs of short-term avoidance strategies and the threshold at which those strategies are no longer effective. The effects of boat interactions were the same in both fjords. The resting state was the most sensitive to... Tipo: Peer-Reviewed Reports Palavras-chave: Tursiops truncatus; Markov chain modeling; Avoidance; Behavioral budget; Boat-dolphin interactions; Boats; Bottlenose dolphin; Impact assessment; Long-term effects; Tourism; Whale-watching. Ano: 2004 Registros recuperados: 6 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco