Search results for " survey."

Night surveys and smell, a mixed method to detect colonies of storm petrel Hydrobates pelagicus

2012

Storm-petrels usually breed in sites difficult to access, making it hard to estimate the number of individuals in a colony or even the presence of a colony. After several years of study in the main colony and diurnal surveys to other caves of the island, we planned an extensive night survey for identifying previously unknown colonies. In the breeding season of 2011 we found 5 new colonies of storm petrels (Hydrobates pelagicus) at Marettimo island, increasing the estimation of the population on this island to approximately 3000 breeding pairs. We propose the use of mixed methods to locate new colonies, as they can be found by the characteristic smell of storm petrels, but under windy condit…

LiDAR-derived DTM for historical landscape evaluation: the case study of the “Harvesting Memories” project (Castro Valley and Mt. Barraù, Corleone – …

2016

The project “Harvesting Memories” is focused on the analysis of the long-term transformation of the cultural landscape in a rural area of Central-Western Sicily (Castro Valley and Mt. Barraù, Corleone – Palermo). In order to quickly outline the history of the territory with an acceptable precision, our survey aimed at covering and sampling as much surface as possible, according to time and human resources available. To reach this goal, in the research design we opted for qualitative surveys. The choice of the fields to be surveyed was based on GIS analysis — our predictive model took in consideration slope, water sources and presence of points with high visibility in the landscape —, that h…

Impact of COVID-19 on aquaculture sector in Malaysia: Findings from the first national survey

2021

Abstract Malaysian aquaculture sector consists of 391,000 t of cultivated organisms produced per year with an economic value for over USD 700 million as estimated in 2019. The COVID-19 pandemic caused a large global human pandemic and it is currently ongoing, affecting profoundly Malaysian aquaculture, which is vital for seafood provision and security assurance. Thus, to increase our understanding about how the pandemic affects aquaculture sectors is crucial to design possible management measures both at local and national level. To do it, we designed a survey, starting in May 2020, consisting of 25 online questions to collect information about the impact of COVID-19 on the aquaculture sect…

Do island plant populations really have lower genetic variation than mainland populations? Effects of selection and distribution range on genetic div…

2015

Ecological and evolutionary studies largely assume that island populations display low levels of neutral genetic variation. However, this notion has only been formally tested in a few cases involving plant taxa, and the confounding effect of selection on genetic diversity (GD) estimates based on putatively neutral markers has typically been overlooked. Here, we generated nuclear microsatellite and plastid DNA sequence data in Periploca laevigata, a plant taxon with an island–mainland distribution area, to (i) investigate whether selection affects GD estimates of populations across contrasting habitats; and (ii) test the long-standing idea that island populations have lower GD than their mai…

Integrated archaeological and geophysical survey for searching the roman temple of Augustus in Terragona, Spain

2009

Indagini nell'area ad ovest del Tempio della Vittoria ad Himera

2021

Himera: New investigations in the area West of the Tempio della Vittoria · The University of Palermo has started a new cycle of field investigations in the “lower town” of Himera, with the aim of answering some questions about the relationships between the Tempio della Vittoria, the residential districts, and the agora, that remained to be clarified after the important results produced by the studies on the urban development of the Greek city over the past forty years. This paper presents some initial results and research perspectives from the first excavation soundings and geophysical survey of 2021. The first findings strongly suggest that the agora extended much further south than previo…

A hypothesis for the redevelopment of the Archaeological Park of Agrigento

2023

The project here presented is developed at the Department of Architecture of the University of Palermo. It is an in-progress research project that combines two fields of knowledge: architectural design and architectural survey. These two branches are combined in a functional redevelopment project of the Valley of the Temples in Agrigento, one of the largest and extraordinary archaeological parks in the Mediterranean area. This interdisciplinary research is driven by three fundamental strategic actions: “survey”, “design” and “representation”. The intervention has four fundamental goals. The first goal is the survey - performed with laser scanning and photogrammetric techniques - of the gymn…

Le geometrie del progetto: il disegno di Giovanni D'Avanzato e il rilievo della facciata di Santa Oliva

2011

The text is focused on the surveying and geometric analysis of the north-eastern facade of the monument named "Quattro Canti" in Palermo

Il disegno dei Quattro Canti di Palermo. Il rilevamento architettonico come premessa alla lettura critica del manufatto

2003

The paper is focused on the photogrammetric survey and dimensional analysis of the monument named "Quattro Canti" in Palermo

Mappe stellari e geometria sacra nel disegno delle città medioevali di Sicilia. Un’ipotesi archeoastronomica su Erice

2020

Already in his studies on the Middle Ages cities E. Guidoni suggested the possibility of an urban design governed not only by precise astronomical alignments, but by a figurative conception, of a zoomorphic or anthropomorphic type, whose aim was to reproduce on the ground the zodiacal constellations. The envelopes and sinuosities of the plots that distinguish the medieval cities would be dictated by an iconographic program in which certain emergencies (churches, towers, domes) and the main connection roads would be arranged in a mirror-or perspective-view of the celestial maps with respect to certain observation points at the meridian or on the horizon of the place. Some examples would be e…