Two scientists in british columbia are counting trout spawning grounds (called redds) along 5 km of a stream. the presence of
milky-colored fish spawn indicates a redd. the scientists walk together, surveying the same areas. what is the most likely reason
for them to count different numbers of redds?

The most likely reason for the scientists to count different numbers of redd is the observer’s efficiency.

Explanation:

In a field survey based on visual counting for visual stock assessment, the scientists may count a different number of redds each time in the same area due to the observer’s or the scientist’s efficiency.

The same place may first appear as redd and then later may not and accordingly the scientist's count also varies.

This error happens due observer’s inexperience in surveying, misidentification of redd species, changes or variations each time in the redd habitat, survey life, characteristics, spawning shifts etc., and poor temporal and spatial coverage.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

the answer is c.) there is a warm front in region a and a stationary front in region b.