Entries by david.shiffman

Jellyfish Blooms are the Result of Global Oscillations

by Megan Piechowski, RJD Intern A recently observed increase in the abundance of jellyfish populations has been suggested to be a symptom of deteriorating oceans. Other indicators include: ocean acidification, eutrophication, and declining fish stocks. However, this conclusion might have been reached prematurely as a thorough and formal analysis of the long-term fluctuation of global […]

Coastal Habitat Modification and its Impact on Sharks

by Fiona Graham, RJD Intern and Masters student New canals are being built, waterways are undergoing modification, coastal urbanization is on the rise and mangrove, seagrass and other coastal vegetation cover is decreasing. Changes in coastal geomorphology alter sedimentation patterns and consequently the physical and biological structure of nearshore habitats is changing. Artificial habitats generally […]

Reproduction in the deep sea

by Megan Piechowski, RJD Intern Have you ever wondered how small, sparsely populated fish find each other to mate in the deep, dark ocean? Due to the unusual light organ that is found dangling over the mouth of a certain deep-sea creature it is likely one of the most well-known and recognizable fish that dwells […]

Fatal Attraction: Debris and Sea Turtles

by Nick Perni, RJD Intern   For decades there has been a steady increase in the production of plastic materials. Due to negligent disposal techniques and the resiliency of the material, plastic accounts for 80% of all Marine debris in some areas. The large abundance of plastic in the world’s oceans and coastal areas has […]

University of Miami scientists catch great white shark in Florida Keys

5/14/13 David Shiffman, Abess Center for Ecosystem Science and Policy student Yesterday, during the course of sampling for our ongoing shark population survey, the RJ Dunlap Marine Conservation Program (RJD)  team caught a great white shark estimated at 10-11 feet in length. The shark was caught east of Islamorada in the Florida Keys, in approximately 100 […]

Fish Aggregating Devices: Ecological Problems with a Common Fishing Technique

by Tom Tascone, RJD Intern If you’ve seen the television show “Wicked Tuna” on National Geographic, then you are certainly familiar with some of the techniques associated with long line fishing of these species.  While this is the method of choice for recreational fishermen, commercial fishermen seeking various species of tropical tuna have abandoned the […]