Sentences with phrase «maximum numbers of birds»

«This was clearly not realistic, as the estimated maximum numbers of birds killed typically exceeded breeding density and productivity combined, such that the prey populations studied would probably have gone extinct rapidly at a local level or acted as a major sink for birds immigrating from neighbouring areas.»

«A management that ensures the maximum number of birds recommended, depending on meteorological conditions, without negatively affecting water quality.»

Not exact matches

For greater accuracy, the experts limited their study to those birds that had travelled distances greater than 50 km from the place where they had been banded — a distance that exceeds the maximum number of kilometres that these birds tend to travel in a single day (10 - 40 km).

All bird species showed the same response, the team reports in the 23 December issue of Science: the number of fledglings per breeding pair started to decline when the abundance of forage fish dropped below one - third of the maximum observed amount.

But the knock - on effect is on nesting birds, which are also trying to hatch their chicks at the same time that there's the maximum number of caterpillars.»