CIMO - Posters em Encontros Científicos Internacionais
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- Gastrointestinal and pulmonary parasites in small ruminants in northeast Portugal - What´s up doc? A case herd studyPublication . Rodrigues, Isabel; Meireles, Samanta Aparecida; Valentim, Ramiro; Ortin, Aurora; Lacasta, Delia; Quintas, HelderThe breeding of small ruminants in northeast Portugal is largely based on a traditional production system, on extensive/semi-extensive grazing and direct use of existing natural resources. Gastrointestinal and pulmonary parasite infections are particularly important, as they can have impact on animal health and welfare, as well as on productivity, and therefore be responsible of economic losses including: delayed growth, weight loss, decreased fertility levels, and also rejections at slaughterhouse. To act on the prophylaxis, one first should have a detailed knowledge of the parasite species involved, as well as their prevalence, in order to plan prevention and control strategies.Samples were analysed to monitor the burden and prevalence of gastrointestinal and pulmonary parasites in two autochthonous sheep and goat breed herd, with similar farm management, and sharing the same graze field. Coprological qualitative and quantitative analysis (flotation, natural sedimentation, mini-Flotac and Baermann technique) were done in two moments, February and April of 2024, to fifteen animals in each flock.The eggs/oocysts genera morphologically identified were: trichostrongyle-type, Nematodirus spp., Moniezia spp., Trichuris spp. and Eimeria spp. Trematode eggs were not identified. The mean egg per gram (EPG) values of trichostrongyle-type ranged from 25 to 67 among the sheep flock., and 62 to 90 among the goat flock. The mean oocyst per gram (OPG) of Eimeria spp. varied greatly in the two flocks, ranging from 0.46 x 102 to 3.11 x 102 among the sheep flock, and 4.74 x 102 to 1.45 x 104 among the goat flock.Fecal examination by the Baermann technique, revealed the overall prevalence of lungworm infection to be, in the goat herd, 21.4% to 33,3%, whereas the sheep samples were negative. The specie found were larvae from Muellerius capillaris.This work aims to continue to: determine the gastrointestinal and pulmonary parasite profile of small ruminants along the year seasons; identify differences in parasite population in the two species, and assess the anthelmintic efficacy and possible resistances. The development and implementation of innovative, refined and sustainable approaches to worm control, targeted at the appropriate regional scale, is a prerequisite for reducing the helminth infection burden in small ruminant livestock production, and therefore increase the productivity and profitability, and also contribute to the preservation of natural resources.
- Promoting species diversity: understanding Sweet Chestnut within regeneration of Scots pine standsPublication . Patrício, Maria Sameiro; Nunes, LuísPine forests exhibit a natural gradual transition to mixed plantations, where hardwoods like sweet chestnut (Castanea sativa Mill.) and oaks begin to establish as ecological succession progress. However, the persistence of chestnut in conifer stands depends heavily on surrounding chestnut stands and light availability. In this case-study of Serra da Nogueira, Portugal – a region characterized by a mosaic of habitats formed by mountain agriculture, with extensive Pyrenean oak forests interspersed with some stands of other hardwoods and conifers, including scots pine (Pinus sylvestris L.) - chestnut persists in the natural regeneration of these stands largely due to existing forest and agroforestry chestnut stands. Advanced regeneration in the understory of Scots pine stands suggests that the chestnut can persist in the natural regeneration dynamics, contributing to the formation of more resilient and biodiverse mixed stands.