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Registros recuperados: 3
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Buried fluvial incisions as a record of Middle-Late Miocene eustasy fall on the Armorican Shelf (Bay of Biscay, France) ArchiMer
Paquet, Fabien; Menier, David; Estournes, Guilhem; Bourillet, Jean-francois; Leroy, Pascal; Guillocheau, Francois.
High-resolution seismic data have been acquired in June 2008 on the Armorican Shelf (AS), in the northern Bay of Biscay, in order to reassess its stratigraphic architecture in detail and to study the impact of eustasy, tectonic and sediment delivery on the margin sedimentary record. Several profiles show fluvial-type incisions of several tens of meters (up to 54 m) associated to a widespread erosion surface. Several hypotheses are proposed for the stratigraphic position of this surface and incisions. We suggest Middle to Late Miocene age. Considering the relatively quiescent tectonic activity of the margin, we infer that the relative sea-level fall responsible of aerial incision on the Miocene shelf is eustasy-related. We propose the attested...
Tipo: Text Palavras-chave: Armorican Shelf; Incised valleys; Miocene; Eustasy; Passive margin.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00001/11200/8048.pdf
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Dairy farms typology and management of animal genetic resources in the peri-urban zone of Bamako (Mali) JARTS
Toure, Abdoulaye; Moula, Nassim; Kouriba, Ali; Traore, Bakary; Leroy, Pascal; Antoine-Moussiaux, Nicolas.
Facing growth in demand, dairy production in peri-urban areas of developing countries is changing rapidly. To characterise this development around Bamako (Mali), this study establishes a typology of dairy production systems with a special focus on animal genetic resources. The survey included 52 dairy cattle farms from six peri-urban sites. It was conducted in 2011 through two visits, in the dry and harvest seasons. The median cattle number per farm was 17 (range 5-118) and 42% of farmers owned cropland (8.3 +/- 7.3 ha, minimum 1 ha, maximum 25 ha). Feeding strategy was a crucial variable in farm characterisation, accounting for about 85% of total expenses. The use of artificial insemination and a regular veterinary follow-up were other important...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal Husbandry; Agricultultural economics dairy cattle; Genetic resources; Multivariate analysis; Mali; Zebu; Crossbreeding.
Ano: 2015 URL: http://www.jarts.info/index.php/jarts/article/view/2015011347137
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The Koundoum sheep breed in Niger: morpho-biometric study and description of the production system JARTS
Hamadou, Issa; Moula, Nassim; Siddo, Seyni; Marichatou, Hamani; Issa, Moumouni; Leroy, Pascal; Antoine-Moussiaux, Nicolas.
The diffusion of highly productive breeds across developing countries goes along with a neglect of indigenous breeds, which are well suited to their environment but often show low yields. Thus, in Niger, the flock of Koundoum sheep are rapidly decreasing. The Koundoum is one of the few wool sheep breeds of Africa and shows important adaptive feature to its native environment, i.e. the humid pastures on the banks of the Niger River. To characterise the breed and to understand its production context, a survey has been conducted in 104 herds in four communes along the Niger River (Kollo, Tillabery, Say and Tera). Nine body measurements, including live weight, were taken on 180 adult sheep (101 females and 79 males). The herds varied from 2 to 60 heads, with a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal Husbandry; Animal Production; Biodiversity biodiversity; Description; Conservation; Koundoum sheep; Morpho-biometry; Niger.
Ano: 2015 URL: http://www.jarts.info/index.php/jarts/article/view/2015011347146
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