41. Overfishing and marine pollution pose additional problems for the population.42. By 1923, the Alaskan salmon population was being depleted from overfishing . 43. Overfishing depleted shellfish stocks, which have still not recovered.44. Due to overfishing , whale oil became rare and expensive. 45. Toothfish are commercially fished, and illegal overfishing has reduced toothfish populations. 46. Their assessment can be expensive and there is no evidence of overfishing . 47. Lamprey distribution may be adversely affected by overfishing and pollution. 48. There are fears the fishery may collapse due to overfishing . 49. Alaska officials have steadfastly denied any overfishing of Canada-bound salmon runs. 50. Specialists generally agree that overfishing is the main cause of the groundfish collapse.
