We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
INVESTIGATION OF THE SPRING MIGRATION OF THE EURASIAN WOODCOCK (Scolopax rusticola Linnaeus, 1758) IN ROMANIA.
- Authors
Attila, BENDE; Viktória, CSANÁDY; Róbert, KULCSÁR; Richárd, LÁSZLÓ
- Abstract
We have only little information on features of woodcocks' spring migration in the territory of Romania - apart from certain hunting data. The research method was to count the features of spring migration both in flat and hilly areas on 10 observation stations. We supposed that the number of observed (seen or heard) woodcocks was in proportion with the temporal change of the number of migrating birds, so the temporal alterations of observation numbers would reflect the dynamism of migration. The nonlinear regression method was used to model the conformation of the witnessed or heard data and the general observations (n=253). We see that, during spring migration (between the second decadal of February and middle of March), the observed number of birds showed a growing tendency - in varying degrees. On the grounds of our model we calculated the observational maximum and it came out that the peak of migration was on 14th March. The analysis of variance showed a statistically appraisable difference in peaks of migration between the observation points in flatlands and hilly areas. In mountainous areas the peak of migration was on 10th of March whereas on flatlands it was on the 20th of March. It verifies the shift in the process of migration in these different geographical elevation types. In accordance with expectations in the case of seen and heard birds' numbers we experienced significant differences (p=0.000), whereas the interaction between the areas and observations was not significant (p=0.135). During the analysis of the relationship between the observations and the observation places we concluded that the number of observed birds is independent from the areas, so there is no significant discrepancy (p=0.461). We must mention that we saw differences between areas in the frequency values, though the experienced frequency distributions can be considered the same in each observation point. It is true that drawing statistically based conclusions on examination of territorial and temporal differences of migration needs a lot of observation data collected through years. Well, the results of our non-representative study with a small item number can be valuable when seeking to expand the knowledge of woodcock migration.
- Subjects
ROMANIA; NONLINEAR regression; DISTRIBUTION (Probability theory); ANALYSIS of variance
- Publication
Oltenia, Studii si Comunicari Seria Stiintele Naturii, 2021, Vol 37, Issue 2, p113
- ISSN
1454-6914
- Publication type
Article