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Abstract(s)
A Codorniz Comum (Coturnix coturnix L.) é a mais pequena ave da ordem das
galiformes, com a particularidade de ser migradora e ter movimentações erráticas. Este
aspeto, associado ao facto de o seu habitat preferencial serem os campos de cerais muito
densos, dificulta seriamente todos os trabalhos de investigação sobre a espécie.
O esquema reprodutivo é extraordinariamente complexo, com múltiplas ligações entre
machos e fêmeas e uma fenologia que vai de Marrocos até ao Sul dos países
escandinavos, em função da latitude e altitude. A precocidade sexual sugere que os
juvenis nascidos em regiões do Sul podem procriar em zonas do Norte.
Na sequência de estudos de monitorização efetuados em quatro países da área de
distribuição Atlântica da espécie, Espanha, França, Marrocos e Portugal (Mirandela –
Nordeste Transmontano e Maranhão – Alto Alentejo), para determinar o estatuto das
populações da codorniz comum foi usada uma nova metodologia baseada no censo de
machos cantores, na captura e anilhagem e na monitorização durante as ceifas dos
cereais. Os resultados sugerem que, durante o período do estudo, a tendência das
populações foi de certa estabilidade, apesar de naturais flutuações interanuais. Esta
monitorização permitiu estabelecer três tipos de categorias para as áreas amostradas,
com diferentes implicações na gestão e na conservação da espécie.
A influência antrópica no habitat parece ser determinante, positiva ou negativamente, na
dinâmica populacional e na conservação da codorniz comum, considerada como um
elemento-chave nos ecossistemas e merecedora de especial atenção do ponto de vista do
seu aproveitamento cinegético racional e sustentado.
A continuidade da monitorização, com recurso às técnicas anteriormente aprendidas,
para aprofundar o conhecimento das tendências populacionais da espécie na região,
nortearam a realização deste trabalho.
The Common Quail (Coturnix coturnix L.) is the smallest bird in the order of galliforms, with the particularity of being migratory and have erratic movements. This aspect, combined with the fact that its preferred habitat are very dense cereal fields, severely hampers all research on the species. The breeding scheme is extraordinarily complex, with multiple connections between males and females and a phenology ranging from Morocco to the South of the Scandinavian countries, depending on latitude and altitude. Sexual precocity suggests that juveniles born in the southern regions can breed in Northern areas. Following monitoring studies conducted in four countries of the Atlantic distribution range of the species, Spain, France, Morocco and Portugal (Mirandela – Nordeste Transmontano and Maranhão – Alto Alentejo), to determine the status of the populations of the common quail was used a new methodology based on census singers males, in the capture and ringing and monitoring during the reaping of grain. The results suggest that during the study period, the trend of the population was fairly stable, although natural inter-annual fluctuations. This monitoring allowed us to establish three types of categories for the sampled areas, with different implications in the management and conservation of the species. The human influence on habitat seems to be decisive, positively or negatively, on population dynamics and conservation of the common quail, regarded as a key element in ecosystems and deserves special attention from the point of view of rational and sustainable hunting use. The continued monitoring, using the techniques previously learned, to increase knowledge of population trends of the species in the region, guided this work.
The Common Quail (Coturnix coturnix L.) is the smallest bird in the order of galliforms, with the particularity of being migratory and have erratic movements. This aspect, combined with the fact that its preferred habitat are very dense cereal fields, severely hampers all research on the species. The breeding scheme is extraordinarily complex, with multiple connections between males and females and a phenology ranging from Morocco to the South of the Scandinavian countries, depending on latitude and altitude. Sexual precocity suggests that juveniles born in the southern regions can breed in Northern areas. Following monitoring studies conducted in four countries of the Atlantic distribution range of the species, Spain, France, Morocco and Portugal (Mirandela – Nordeste Transmontano and Maranhão – Alto Alentejo), to determine the status of the populations of the common quail was used a new methodology based on census singers males, in the capture and ringing and monitoring during the reaping of grain. The results suggest that during the study period, the trend of the population was fairly stable, although natural inter-annual fluctuations. This monitoring allowed us to establish three types of categories for the sampled areas, with different implications in the management and conservation of the species. The human influence on habitat seems to be decisive, positively or negatively, on population dynamics and conservation of the common quail, regarded as a key element in ecosystems and deserves special attention from the point of view of rational and sustainable hunting use. The continued monitoring, using the techniques previously learned, to increase knowledge of population trends of the species in the region, guided this work.