Pollution And Fishing Threats To Marbled Murrelets

In the summer the murrelets feed in bays inlets fjords and open ocean between 5 50 meters from the coast.

Pollution and fishing threats to marbled murrelets.

Marine factors that have been identified as potential threats to murrelets include overfishing pollution unattended fishing gear human population growth and associated disturbance and more recently climate change. Carter and katherine j. Mortality of marbled murrelets due to oil pollution in north america 303k harry r. Michael fry chapter 26.

261 mortality of marbled murrelets due to oil pollution in north america harry r. Marbled murrelets were assessed as threatened in canada by cosewic in 1990 and this status was confirmed. The principal pollutant threats to marbled murrelets are chlorinated organic effluent discharges. The threats to marbled murrelets vary depending on each location but overall populations have been declining.

Threats include loss of habitat predation gill net fishing operations oil spills marine pollution and disease. Marbled murrelets nest in trees along the coast and the forage and winter off the coast of northern america. Pollution and fishing threats to marbled murrelets 93k d. Pollution and fishing threats to marbled murrelets d.

The decline has been attributed to a number of factors including reduction and fragmentation of old growth forests. Recent reviews have concluded that the risk of predation is currently a larger threat then previously considered. Mortality of marbled murrelets due to oil pollution in north america harry r. Carter and katherine j.

Usda forest service gen. Marbled murrelet is estimated to be about 357 900 birds with an estimated 99 100 birds currently in canada 28. Marbled murrelets appear to establish long term pair bonds and fidelity to nesting areas and nest trees. Michael fry chapter 26.