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Blood samples of breeding birds are taken without trapping, as this reduces stress, which could change blood parameters, for example by increasing stress hormones.
en.wikipedia.org Hunting, fishing and trapping are major economic activities, but in recent years art printmaking has played an increasing role in the local economy.
en.wikipedia.org The martin's apparent demise may have been hastened by trapping, loss of habitat and the construction of dams.
en.wikipedia.org This trapping is a product of local air circulations.
en.wikipedia.org Trapping is also an important means of income.
en.wikipedia.org