BACKGROUND Ligia isopods are widely distributed in the Pacific rocky intertidal shores from central California to central Mexico, including the Gulf of California. Yet, their biological characteristics restrict them to complete their life cycles in a very narrow range of the rocky intertidal supralittoral. Herein, we examine phylogeographic patterns of Ligia isopods from 122 localities between ...

38-khz ADCP Investigation of Deep Scattering Layers in Sperm Whale Habitat in the Northern Gulf of Mexico. (December 2004) Amanda May Olson, B.S., University of North Dakota Co-Chairs of Advisory Committee: Dr. Douglas C. Biggs Dr. Steven F. DiMarco A hull-mounted 38-kHz phased-array acoustic Doppler current profiler (ADCP) was used to acoustically survey the continental margin of the northern ...

Corn cultivation in the United States is expected to increase to meet demand for ethanol. Nitrogen leaching from fertilized corn fields to the Mississippi-Atchafalaya River system is a primary cause of the bottom-water hypoxia that develops on the continental shelf of the northern Gulf of Mexico each summer. In this study, we combine agricultural land use scenarios with physically based models ...

Morphological information is given on the adults of 4 trematodes from Mugil cephalus from estuarine waters of the northern Gulf of Mexico with complementary information from specimens from Georgia. Lasiotocus glebulentus sp. n., from the Gulf, possesses a submedian genital pore and apparently differs from all known species by containing several large concretions in the excretory vesicle. Data a...

The history of meltwater flow from the Laurentide Ice Sheet to the Gulf of Mexico during the last deglaciation, which holds possible implications for the cause of the Younger Dryas cold episode, is not well understood. We propose a new chronology based on using the percentage of reworked calcareous nannofossils in Orca Basin sediments as a proxy for erosion. The period of greatest meltwater flo...

PURPOSE: This technical note summarizes current knowledge regarding the conservation and management of Snowy Plover (Charadrius alexandrinus; abbreviated as SNPL; also called Kentish Plover in Europe) along the eastern Gulf of Mexico coast in Florida, Alabama, and Mississippi (Figures 1 and 2). Comprehensive surveys suggest there are ~250 SNPL breeding pairs in this region. This has led to subs...

Barrier islands on the north coast of the Gulf of Mexico are an internationally important coastal resource. Each spring hundreds of thousands of Nearctic-Neotropical songbirds crossing the Gulf of Mexico during spring migration use these islands because they provide the first landfall for individuals following a trans-Gulf migratory route. The effects of climate change, particularly sea level r...

INTRODUCTION AND SETTING The East and West Flower Garden Banks (EFGB and WFGB) were designated as the Flower Garden Banks National Marine Sanctuary (FGBNMS) through the National Oceanic and Atmospheric Administration (NOAA) in January 1992. The two banks are prominent geological features located near the outer edge of the continental shelf in the northwestern Gulf of Mexico, approximately 192 k...

Nitrogen from the Mississippi River Basin is believed to be at least partly responsible for the large zone of oxygen-depleted water that develops in the Gulf of Mexico each summer. Historical data show that concentrations of nitrate in the Mississippi River and some of its tributaries have increased by factors of 2 to more than 5 since the early 1900s. We have used the historical streamflow and...

The Deepwater Horizon oil spill in the Gulf of Mexico in 2010 resulted in record amounts of oil and dispersants that potentially could be circulated far from the spill origin. Research was conducted to examine the possibility of transfer of oil compounds into the marine foodchain. Specifically, the pathway of oil uptake by menhaden in the Gulf of Mexico, a fish that migrates to waters off the c...