Samvariation mellan systematiska räkningar och spontan rapportering av rastande vadare i Getteröns naturreservat

Abstract

This paper is an attempt to describe how strong the covariation is between systematic counts and spontaneous reporting of staging waders at the Getterön Nature Reserve in southwestern Sweden. The material is based on systematic and spontaneous observations of twelve species of waders, made on the same days during the autumn migration in July–October 2010–2019. There is a significant positive correlation between the two methods for nine of twelve species. However, there is a large variation in the strength of the correlations, with the strongest correlation seen for Dunlin Calidris alpina. The Wood Sandpiper Tringa glareola, Green Sandpiper Tringa ochropus, and Little Stint Calidris minuta, on the other hand, show no significant correlations. This shows the difficulties in evaluating quantitative data of the wader occurrence at stopover areas such as Getterön. The variation in correlation between count methods between different species entails an uncertainty, which is probably due to low reliability in the spontaneous reporting. Thus, in the case of studies of staging waders based solely on spontaneous data, caution should be exercised.

Economic impact of investment in animal welfare–enhancing flooring solutions – Implications for promoting sustainable dairy production in Sweden

“…The differences in income observed in this study may be due to the timing of the survey, price levels, and the fact that we considered different parameters in the present study. The differences in income between the two breeds is contrary to what Andersson (2011) found in a comparison between the incomes obtained from SR and SH cows. Andersson (2011) found small differences between the incomes generated by the two breeds, with SH cows obtaining higher income compared with SR cows.…”

“…The differences in income between the two breeds is contrary to what Andersson (2011) found in a comparison between the incomes obtained from SR and SH cows. Andersson (2011) found small differences between the incomes generated by the two breeds, with SH cows obtaining higher income compared with SR cows. It is worth noting that the comparison made by Andersson (2011) did not consider flooring types.…”

“…Andersson (2011) found small differences between the incomes generated by the two breeds, with SH cows obtaining higher income compared with SR cows. It is worth noting that the comparison made by Andersson (2011) did not consider flooring types. The approach developed here can be used Animal welfareenhancing flooring for such evaluations, using data from other case study areas.…”

“…The analysis was done with the assumption that there are herds consisting solely of SR and SH cattle. We performed separate analysis for each breed because the two breeds differ in terms of milk output (Bieber et al, 2020;V€ axa Sverige, 2019;Sverige, V€ axa, 2020c), veterinary treatment, resistance to disease and disorders (Bieber et al, 2020), and farm returns (Andersson, 2011). In addition, most Swedish farms have a mix of SR and SH cattle.…”

“…For instance, milk yield differs across breeds with SH yielding 10,790 Kg ECM and SR yielding 9,910 Kg ECM (V€ axa Sverige, 2020b). Annual return per SH cow is V2,997 [2] and V2,878 per SR cow (Andersson, 2011).…”