Stoneflies have negligible consumptive (thin solid line) and behavioral effects (thin dashed line) on mayfly abundance. Consumption by trout decreases the abundance of mayflies (solid line), but trout suppress mayfly emigration (drift) and thereby increase their abundance (thick dashed line).

He proposed a one-way relationship between the hereditary material contained in the gametes (the germ-plasm) and the rest of the body (the somatoplasm). He recognised that the germ-plasm is continuous from generation to generation. In each generation it is responsible for forming the somatoplasm. Crucially, however, the somatoplasm does not influence the germ-plasm.

The butchery's profit rate on various meats varies greatly.

You'll be on probation for first six months. After that, if you work out, they'll hire you permanently.