Sentence examples for population productivity from inspiring English sources

Some programs have increased the number of adults that spawn in the wild (Berejikian et al. in press), but increases in wild population productivity or even wild production have not been documented.

For example, several studies have found widespread negative correlations between natural population productivity and intensity of hatchery production (e.g. Chilcote 2003; Nickelson 2003; Hoekstra et al. 2007).

And much of the faster growth in the United States simply reflects the country's rapid increase in population: productivity per worker is actually fairly similar to that in the EU.

A comparison was made of three small-area sampling methods [two traditional design-based methods (ratio-synthetic, sample-size dependent) and one model-based method (EBLUP)] in estimation of some cow and sow population productivity parameters.

This ratio is commonly used as a surrogate of population productivity when actual reproductive success is difficult to record [22], [23], as it is the case of the secretive Dupont's Lark [14].

We found an association between male song diversity and the annual rate of population change, population productivity and population size, resulting in birds singing poor repertoires in populations more prone to extinction.

To estimate the long-term change in population productivities caused by rapid global warming, estimated P ij values for 36-year-old transplants in the downslope direction were considered, because downslope movements simulate the effects of warming.

Or under conditions of climate change, farmers could select for seed characteristics, such as grain size, which, if negatively correlated with the tolerance to heat during the grain filling stage, could reduce the populations' productivity in high temperatures.

It should be noted that this discussion of the potential adverse effects of global warming on the current and future performance of A. sachalinensis takes no account of other warming-influenced factors, such as changes in the amount of precipitation or the biotic relationships within the stand that might affect populations' productivity.

The feminising parasite is able to achieve this by mitigating the reduction in the host population's productivity due to the production of males (the "two fold cost of sex") [ 59].

(Krugman offers more possible explanations: declining rates of population or productivity growth).