2,836 research outputs found
Avaliação do impacto de métodos florestais e de seca severa na população de coelho-bravo na mata nacional de Quiaios
No full textMestrado em Ecologia, Biodiversidade e Gestão de EcossistemasO papel determinante na cadeia trófica, faz do coelho-bravo (Oryctolagus
cuniculus) uma espécie chave dos ecossistemas ibéricos onde constitui a principal
presa de um vasto leque de predadores, alguns dos quais de elevado valor de
conservação. Este factor confere uma relevância ainda maior ao acentuado
declínio que esta espécie tem sofrido, na generalidade dos ecossistemas
mediterrânicos, provocado pela perda e fragmentação do seu habitat, por doenças,
predação e pressão cinegética excessiva. Neste trabalho efectuou-se o estudo e
caracterização das dinâmicas populacionais de coelho-bravo na Mata Nacional de
Quiaios, uma floresta costeira no centro de Portugal, incluída na rede Natura 2000.
Pretendeu-se por um lado, estudar o impacto de métodos florestais,
nomeadamente actividades de silvicultura preventiva contra o avanço de espécies
vegetais invasoras, e, por outro, o impacto de um período de seca severa nas suas
populações. Foram monitorizadas as populações de coelho-bravo duas vezes por
ano, Verão e Inverno, nas várias zonas preestabelecidas. A primeira época
estudada foi o Verão de 2002 e a última foi a de Inverno de 2008. A determinação
da abundância do coelho-bravo foi feita através da contagem de latrinas por
classes, ao longo de percursos predefinidos. Foram considerados os seguintes
biótopos: (i) zona de matos densos; (ii) zona de matos com baixa densidade de
acácia; (iii) zona de acacial; (iv) zona de limpeza mecânica de 2005; (v) zona de
limpeza mecânica de 2006; (vi) zona de pinhal esparso; (vii) zona de pinhal denso;
(viii) zona de duna. Os resultados obtidos confirmam os efeitos das limpezas
mecânicas, sugerindo, no entanto, um impacto diferenciado consoante a
metodologia aplicada. O método utilizado em 2005 foi mais agressivo e provocou
uma taxa de mortalidade mais elevada, enquanto que, o de 2006, apenas originou
o abandono do local. No que diz respeito ao efeito da seca, os resultados também
apontam no sentido do seu impacto nas populações dado que foram observadas
fortes diminuições coincidentes com o referido período. De salientar, ainda, que
este impacto dependeu do habitat estudado, dado que, em alguns dos biótopos,
como a duna e o acacial, não foram verificadas quebras na abundância. Este facto
deveu-se, provavelmente, ao tipo de vegetação dominante nestes habitats,
adaptada a ambientes secos, pelo que os períodos de seca não se devem reflectir
de forma tão evidente na disponibilidade alimentar. Este trabalho mostrou como
uma monitorização de coelho-bravo, utilizando metodologias simples e
económicas, pode constituir um importante contributo para uma mais correcta
gestão dos ecossistemas ibéricos.The determinant role in trophic chain, makes wild rabbit (Oryctolagus cuniculus) a
key species of Iberian ecosystems, being the main prey to a large number of
predators, some of which of great conservation value. This factor confers a higher
relevance to its marked decline observed on the majority of mediterranic
ecosystems, caused by habitat loss and fragmentation, and diseases, predation
and high hunting pressure. This work aimed to study and characterize the wild
rabbit population dynamics in Quiaios National Forest, a coastal forest in the centre
of Portugal included in a Natura 2000 network site. It was intended to study, in one
hand, the impact of forest practices, such as activities of preventive forestry against
the advance of invading species, and, in other hand, the impact of a severe drought
on populations. Wild rabbit populations were monitorized twice a year, Summer and
Winter, in predefined areas. Summer 2002 was the first studied season and Winter
2008 was the last. The determination of wild rabbit abundances was carried on
through latrine counts along the sampling transects. Several biotopes were defined:
(i) dense scrublands; (ii) scrublands with low densities of Acacia longifolia; (iii)
scrublands with high densities of Acacia longifolia; (iv) the 2005 intervention area;
(v) the 2006 intervention area; (vi) sparse pine forest; (vii) dense pine forest; (viii)
dune. The results confirm the effect of interventions suggesting, however, a
differentiated impact depending on the applied methodology. The 2005 intervention
was more aggressive provoking a higher mortality rate, while the 2006 intervention
only cause the area abandonment. Concerning drought effects, results also point
toward to an impact in populations given the strong reductions observed in its
abundance, coincident to that period. However, it has to be referred that this impact
showed to depend on the biotope, because in some of them, like dune and
scrublands with high densities of Acacia longifolia, decreases in species abundance
wasn’t detected. This fact is, probably, related with the dominant vegetation type of
those areas, adapted to dry environments, with lower effects on the rabbit’s food
availability. This work showed a how a wild rabbit monitorization, using simple and
economical methodologies, can provide reliable and comparable results that may
constitute an important contribute to a sustainable management of Iberian forest
areas
Lean into the mess: A review of Your Fat Friend (2023) and conversation with director and producer Jeanie Finlay
No full textAllegra Morgado’s review of the film Your Fat Friend brings together her perspective as a fat woman and the power of seeing one’s experiences mirrored on screen. Featuring a conversation with director and producer Jeanie Finlay, Morgado explores the nuanced depiction of author and podcaster Aubrey Gordon’s life in the documentary film, the meaning of it, and the impact the film has for fat folks and non-fat folks alike. Morgado includes excerpts from her conversation with Finlay to invite the reader into a behind-the-scenes look of the making of the film and the joyous messiness of the creative process. 
Theory and methods of the usewear analysis of lithic tools and the example of the arrowheads from the Morgado Superior Cave (Tomar, Pt)
No full textAfter an introduction about history, potentialities and methods of the usewear analysis on prehistoric lithic industries, with a short description of the most common usewear traces, the case of the arrowheads from Gruta do Morgado Superior
is an example of the usewear analysis methodology applied to an archaeological context. The use wear analysis of the arrowheads from the Morgado Cave allowed identifying the strong symbolic value of those elements of the grave goods for that human group and, at the same time, to hypothesize the existence of different hunting strategies
Prediction of Simulated 1,000 m Kayak Ergometer Performance in Young Athletes
No full textThis study aimed to develop a predictive explanatory model for the 1,000-m time-trial (TT) performance in young national-level kayakers, from biomechanical and physiological parameters assessed in a maximal graded exercise test (GXT). Twelve young male flat-water kayakers (age 16.1 ± 1.1 years) participated in the study. The design consisted of 2 exercise protocols, separated by 48 h, on a kayak ergometer. The first protocol consisted of a GXT starting at 8 km.h−1 with increments in speed of 1 km.h−1 at each 2-min interval until exhaustion. The second protocol comprised the 1,000-m TT. Results: In the GXT, they reached an absolute (Formula presented.) O2max of 3.5 ± 0.7 (L.min−1), a maximum aerobic power (MAP) of 138.5 ± 24.5 watts (W) and a maximum aerobic speed (MAS) of 12.8 ± 0.5 km/h. The TT had a mean duration of 292.3 ± 15 s, a power output of 132.6 ± 22.0 W and a (Formula presented.) O2max of 3.5 ± 0.6 (L.min−1). The regression model [TT (s) = 413.378–0.433 × (MAP)−0.554 × (stroke rate at MAP)] presented an R2 = 84.5%. Conclusion: It was found that (Formula presented.) O2max, stroke distance and stroke rate during the GXT were not different from the corresponding variables ((Formula presented.) O2peak, stroke distance and stroke rate) observed during the TT. The MAP and the corresponding stroke rate were strong predicting factors of 1,000 m TT performance. In conclusion, the TT can be useful for quantifying biomechanical parameters (stroke distance and stroke rate) and to monitor training induced changes in the cardiorespiratory fitness ((Formula presented.) O2max). © Copyright © 2021 Coelho, Nakamura, Morgado, Alves, Di Baldassarre, Flatt and Rama
Dasiops dentatus Norrbom & McAlpine 1997
No full textdentatus Norrbom & McAlpine, 1997: 200. Type locality: Peru, Junin. HT F (USNM). Distr.: Peru and Colombia. Refs.: Causton & Peña, 2002: 270; Hernandez, 2011: 38; Uchôa, 2012: 285, Carrero et al., 2013: 438.Published as part of Fernandes, Juliana Morgado & Couri, Márcia Souto, 2016, FAMILY LONCHAEIDAE, pp. 566-575 in Zootaxa 4122 (1) on page 568, DOI: 10.11646/zootaxa.4122.1.45, http://zenodo.org/record/25590
Dasiops plumeus McAlpine 1964
No full textplumeus McAlpine, 1964 a: 676. Type locality: Colombia, Rio Sambingo, 32 millas N. La Union Narino. HT F (CAS). Distr.: Colombia. Refs.: Korytkowski & Ojeda, 1971; Hernandez, 2011: 57.Published as part of Fernandes, Juliana Morgado & Couri, Márcia Souto, 2016, FAMILY LONCHAEIDAE, pp. 566-575 in Zootaxa 4122 (1) on page 568, DOI: 10.11646/zootaxa.4122.1.45, http://zenodo.org/record/25590
Dasiops longulus Norrbom & McAlpine 1997
No full textlongulus Norrbom & McAlpine, 1997: 205. Type locality: Brazil, São Paulo, Santa Isabel. HT F (MZUSP). Distr.: Brazil and Colombia. Refs.: Aguiar-Menezes et al., 2004: 114; Uchôa, 2012: 286; Felix, 2013: 6.Published as part of Fernandes, Juliana Morgado & Couri, Márcia Souto, 2016, FAMILY LONCHAEIDAE, pp. 566-575 in Zootaxa 4122 (1) on page 568, DOI: 10.11646/zootaxa.4122.1.45, http://zenodo.org/record/25590
Dasiops plaumanni McAlpine 1964
No full textplaumanni McAlpine, 1964 a: 662. Type locality: Brazil, Nova Teutonia,. HT F (CNC). Distr.: Brazil and Colombia. Refs.: Hernandez, 2011: 54; Castro, 2012: 25; Castro et al., 2012: 6684.Published as part of Fernandes, Juliana Morgado & Couri, Márcia Souto, 2016, FAMILY LONCHAEIDAE, pp. 566-575 in Zootaxa 4122 (1) on page 568, DOI: 10.11646/zootaxa.4122.1.45, http://zenodo.org/record/25590
Scientific keys for quality education
No full textScientific clues for high quality education
Author: Ignacio Morgado Bernal
Professor in Psychobiology at the Institute of Neurosciences at the Universidad Autónoma de Barcelona
We have recently made great strides on how the human brain represents and stores information. Learning basically means acquiring new neuronal representations of knowledge and establishing functional connections between them and the ones previously existent in our brain. This is possible because when we learn we make new connections (synapses) between neurons storing knowledge or we reinforce those previously existing
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