A marine biologist wanted to investigate the swimming performance of juvenile coho salmon reared in two different environments: natural-channel hatcheries versus traditional concrete raceway hatcheries. Previous research comparing the athletic performance of salmon from these two rearing environments has yielded conflicting and inconsistent results.
The biologist randomly selected six river basins in a regional district and contacted the hatchery managers. Managers at four of the six basins agreed to participate in the study. From each of these four cooperative basins, the biologist sampled juvenile coho salmon from one natural-channel hatchery and one concrete raceway hatchery. Each fish was placed in a swim tunnel respirometer to measure its critical swimming speed (UcritU_{\text{crit}}Ucrit), measured in body lengths per second (BL⋅s−1BL \cdot s^{-1}BL⋅s−1).
Write a suitable hypothesis for this investigation.
Practise AQA A Level Psychology Scientific processes with exam-style questions for A Level Psychology. 689 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
