|July 2015 - Present||Associate Professor, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|May 2012 - Present||Major Chair - Marine Biology, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|August 2011 - June 2015||Adjunct Professor, Nova Southeastern University ‐ Oceanographic Center|
|August 2011 - June 2015||Assistant Professor, Nova Southeastern University ‐ Farquhar College of Arts and Sciences|
|September 2006 - July 2011||Research Scientist & Adjunct Professor, Nova Southeastern University ‐ Oceanographic Center|
marine trophic dynamics and ocean production, coastal and oceanographic conditions on marine production, application of stable isotope rations and trace element analysis, tracing geographic variability in marine food sources, pinniped ecology, zooplankton ecology, controlled fractionation studies in fishery settings, paleoecology and paleoceanographic conditions, and global climate change
|2001||Ph.D. Biological Oceanography, University of Alaska, Fairbanks|
|1989||M.S. Zoology, University of Northern Colorado|
|1986||B.S. Biology / Marine Science, Hawaii Loa College|
Southward Flow on the Western Flank of the Florida Current Deep Sea Research Part I: Oceanographic Research Papers (2017)
A suite of long-term in situ measurements in the Straits of Florida, including the ADCP bottom moorings at an 11-m isobath and 244-m isobath (Miami Terrace) and several ADCP ship transects, have revealed a remarkable ...
Combined Gut Content and Stable Isotope Trophic Analysis of the Pelagic Stingray Pteroplaytrygon violacea (Bonaparte, 1832) Diet from the Western North Atlantic Ocean Journal of Applied Ichthyology (2017)
The understanding of trophic relationships is vital for correctly modeling ecosystems and ecosystem effects of fisheries removals. The pelagic stingray is found in epipelagic sub-tropical and tropical waters worldwide and is a common bycatch in ...
Host Abundance, Seagrass Cover, and Temperature Predict Infection Rates of Parasitic Isopods (Bopyridae) on Caridean Shrimp. Journal of Parasitology (2017)
Caridean shrimp are critical components of seagrass communities and occasionally harbor parasitic bopyrid isopods, which can negatively impact their hosts. However, the ecological factors that drive infection rates of parasitic bopyrid isopods in host carideans ...
Combined Stomach Content and δ13C/δ15N Analyses of Oilfish, Escolar, Snake Mackerel and Lancetfish in the Western North Atlantic Marine Ecology (2016)
Large, mesopelagic teleost fishes have a potentially keystone position in the ecology of the pelagic water column, yet remain relatively unstudied when compared with large, commercially important, epipelagic fishes. Here, the ecological roles of four, ...
Biomixing Due to Diel Vertical Migrations of Zooplankton: Comparison of Computational Fluid Dynamics Model with Observations Ocean Modelling (2016)
Recent studies (Dewar et al., 2006; Wilhelmus and Dabiri, 2014) suggest that diel vertical migrations (DVM) of zooplankton (or other migrating organisms) may have an impact on ocean mixing, though details are not completely clear. ...
Trophic Linkages of Intracoastal Waterway Seagrass Beds in Browards County, Florida Florida Scientist (2015)
Seagrass habitats support marine food webs and provide essential habitat for a variety of species. Seagrasses and associated algae at three locations along the Intracoastal Waterway in Broward County, FL were assessed for their trophic ...
An International Assessment of Mangrove Management: Incorporation in Integrated Coastal Zone Management Diversity (2015)
Due to increasing recognition of the benefits provided by mangrove ecosystems, protection policies have emerged under both wetland and forestry programs. However, little consistency remains among these programs and inadequate coordination exists among sectors of ...
Biogeochemical Analysis of Ancient Pacific Cod Bone Suggests Hg Bioaccumulation was Linked to Paleo Sea Level Rise and Climate Change Frontiers in Environmental Science (2015)
Deglaciation at the end of the Pleistocene initiated major changes in ocean circulation and distribution. Within a brief geological time, large areas of land were inundated by sea-level rise and today global sea level is ...
Spectral Sensitivity, Luminous Sensitivity, and Temporal Resolution of the Visual Systems in Three Sympatric Temperate Coastal Shark Species Journal of Comparative Physiology A (2014)
We used electroretinography (ERG) to determine spectral and luminous sensitivities, and the temporal resolution (flicker fusion frequency, FFF) in three sympatric (but phylogenetically distant) coastal shark species: Carcharhinus plumbeus (sandbar shark), Mustelus canis (smooth dogfish), ...
Stable Isotopes Confirm a Coastal Diet for Critically Endangered Mediterranean Monk Seals Isotopes in Environmental and Health Studies (2014)
Understanding the ecology and behaviour of endangered species is essential for developing effective management and conservation strategies.We used stable isotope analysis to investigate the foraging behaviour of critically endangered Mediterranean monk seals (Monachus monachus) in ...
Trophic Levels of North Pacific Humpback Whales (Megaptera novaeangliae) Through Analysis of Stable Isotopes: Implications on Prey and Resource Quality Aquatic Mammals (2011)
Trophic levels of 1,105 humpback whales from six geographically and isotopically distinct North Pacific feeding groups were calculated using δ15N of humpback whales and regional primary consumers. The overall mean trophic level for North Pacific ...
Using Movements, Genetics and Trophic Ecology to Differentiate Inshore from Offshore Aggregations of Humpback Whales in the Gulf of Alaska Endangered Species Research (2011)
Humpback whales Megaptera novaeangliae have been studied in the coastal waters of the Gulf of Alaska (GOA) since the late 1960s, but information about whales foraging offshore is limited. A large-scale collaborative project (SPLASH) provided ...
Occurrence of an Ocean Sunfish (Mola mola) Larva in the Florida Current Florida Scientist (2010)
During a yearlong ichthyoplankton survey conducted in the Florida Current, a single ocean sunfish, Mola mola, was found from the 284 samples and 1,454 identified specimens. This sunfish larva is one of only 17 on ...
Diet of Pacific Sleeper Shark, a Potential Steller Sea Lion Predator, in the North-East Pacific Ocean Journal of Fish Biology (2006)
Pacific sleeper sharks Somniosus pacificus were captured near Steller sea lion Eumetopias jubatus rookeries during the period when Steller sea lion pups are most vulnerable to Pacific sleeper shark predation (first water entrance and weaning). ...
Temporal Records of δ13C and δ15N in North Pacific Pinnipeds: Inferences Regarding Environmental Change and Diet Oecologia (2001)
Sea lion and seal populations in Alaskan waters underwent various degrees of decline during the latter half of the twentieth century and the cause(s) for the declines remain uncertain. The stable carbon (13C/12C) and nitrogen ...
Growth Rates of Vibrissae of Harbor Seals (Phoca vitulina) and Steller Sea Lions (Eumetopias jubatus) Canadian Journal of Zoology (2001)
Growth rates of vibrissae (whiskers), which act as a temporal record of feeding in harbor seals (Phoca vitulina) and Steller sea lions (Eumetopias jubatus), were estimated using 13C- and 15N-labeled glycine followed by stable-isotope analysis. ...
Multi-Decadal Assessment of Heavy Metals in Body Tissue and Vibrissae of Select North Pacific Marine Mammals Chemistry and Physics Faculty Proceedings, Presentations, Speeches, Lectures (2018)
For the past several decades, it has been observed that various marine mammal populations, including those of harbor seals (Phoca vitulina), northern fur seals (Callorhinus ursinus), stellar sea lions (Eumetopias jubatus) and northern sea otters ...
Effects of Age and Mass on Oxygen Store Development in Phocid Seals HCNSO Ocean Science Research Symposium (2018)
Phocids have large oxygen stores that result in prolonged diving capabilities. Pups do not have fully developed stores at birth for diving and foraging and require a terrestrial post-weaning fast to develop adequate oxygen. A ...
Peruvian pinnipeds as archivist of ENSO effects off the coast of Peru HCNSO Ocean Science Research Symposium (2018)
Environmental fluctuations in the eastern Pacific Ocean are reflected in the tissues of one of its most vulnerable apex predators, the Peruvian fur seal Arctocephalus australis. The coastal waters off Peru are a region of ...
Paleoceanographic Productivity Reconstructions Using Marine Mammal Bone Collagen Oceanography Faculty Proceedings, Presentations, Speeches, Lectures (2016)
Changes in primary ocean productivity play a key role in determining the structure and biomass yield of the North Pacific ecosystem. Archaeofaunal remains of marine mammals from the Aleutian Islands, Alaska were used as a ...
Dissipation Rate of Turbulent Kinetic Energy in Diel Vertical Migrations: Comparison of ANSYS Fluent Model to Measurements Oceanography Faculty Proceedings, Presentations, Speeches, Lectures (2015)
Recent studies suggest that diel vertical migrations of zooplankton may have an impact on ocean mixing, though details are not completely clear. A strong sound scattering layer of zooplankton undergoing diel vertical migrations was observed ...
Comparison of Food Webs Among Limestone Boulder Artificial Reefs, Natural Reefs and Soft Bottom Oceanography Faculty Proceedings, Presentations, Speeches, Lectures (2015)
South Florida coastal waters, unlike the Gulf of Mexico, are unique by having both natural and artificial reefs closely associated with each other. In an effort to determine how artificial reefs are impacting soft bottom ...