Entries by l.vandermeiden

Seafloor Biomass and Climate Change

By: Patrick Goebel, RJD Intern The bottom of the ocean is a dark and mysterious place. It was first believed that this was a lifeless barren dessert. However, in recent years our understanding of this wasteland has changed. Submersible submarines, baited cameras and core samples have shown that life can survive at these deep depths. […]

Cetacean Species Affected by Warming Arctic

By Hannah Armstrong, RJD Intern Global climate change, among other anthropogenic issues, is becoming an increasingly significant threat to the Arctic region of the world.  Specifically, higher average temperatures and rapidly disappearing sea ice are of conservation concern for ice-dependent species.  Arctic marine mammals are specifically adapted to take advantage of the climatic conditions that […]

Comprehensive Review of IUCN Shark and Ray Extinction Risk: Factors increasing risk, under-management of fisheries, and shortcomings in current conservation activities

By Kyra Hartog, RJD Intern The natural world is changing rapidly in the face of land and coastal development, climate change, fisheries, and other human impacts. With these changes come conservation concerns for the various species that inhabit these areas impacted by human activities. The International Union for Conservation of Nature and Natural Resources (IUCN) […]

Fish living in the “twilight zone” have a greater biomass than previously thought.

By James Keegan, RJD Intern Mesopelagic fish, fish living at depths between 200 and 1000 meters in the ocean, reside in water with very low levels of light. Although they are typically small, mesopelagic fish constitute the largest biomass of fish in the world because of their immense numbers. Previous estimates state that there are […]

How Climate Change Affects Marine Species, their Environments and the U.S. Endangered Species Act

By Jacob Jerome, RJD Intern Despite a frigid winter in a large portion of the U.S., global climate change is upon us and average global temperatures are increasing. Many of us think about how climate change will affect us personally, but forget that it affects marine species too, especially those that are threatened or endangered. […]

DNA Barcoding: What is it and how can it help stranded marine mammals?

By Hannah Calich, RJD Graduate Student and Intern Prior to 2003, when someone wanted to identify a biological specimen they would examine its morphological features (such as the shape, size, or colour of specific body parts). However, identification wasn’t possible with degraded specimens. To combat this, in 2003 Paul Hebert proposed “DNA barcoding” as a […]