61 S in the Gulf of Mexico have documented a large area with seasonally depleted O2 levels (<2 mg L−1). Most aquatic species cannot survive at such low O2 levels. A reduction in NO3–N loading by 30% was initially recommended to reduce hypoxia in the Gulf of Mexico (Mitsch et al., 1999). Following a scientifi c reassessment that recommended a reduction of 45% (USEPA, 2007), the USEPA developed a...

The Indo-West Pacific (IWP) coral-reef damselfish Neopomacentrus cyanomos is well established across the south-west Gulf of Mexico (SwGoMx). Comparisons of mtDNA sequences of the SwGoMx population with those from conspecifics from 16 sites scattered across its native geographic range show that the SwGoMx population is derived from two of four native lineages: one from the north-west Pacific Oce...

*Correspondence: Víctor Magaña, Circuito de la Investigación Cientifica, Instituto de Geografía, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Coyoacan, Mexico City 04510, Mexico e-mail: [email protected] Cold surges are a dominant feature of midlatitude tropical interaction. During the North Hemisphere (NH) winter, midlatitude waves propagating from the Rocky Mountains into th...

STOCK DEFINITION AND GEOGRAPHIC RANGE The pygmy sperm whale appears to be distributed worldwide in temperate to tropical waters (Caldwell and Caldwell 1989; Bloodworth and Odell 2008). Sightings of these animals in the northern Gulf of Mexico (i.e., U.S. Gulf of Mexico) occur primarily in oceanic waters (Figure 1; Mullin et al. 1991; Mullin and Fulling 2004; MazeFoley and Mullin 2006). Pygmy sp...

Phenanthrene- and naphthalene-degrading bacteria were isolated from four offshore and nearshore locations in the Gulf of Mexico by using a modified most-probable-number technique. The concentrations of these bacteria ranged from 10(2) to 10(6) cells per ml of wet surficial sediment in mildly contaminated and noncontaminated sediments. A total of 23 strains of polycyclic aromatic hydrocarbon (PA...

We update and reevaluate the scientific information on the distribution, history, and causes of continental shelf hypoxia that supports the 2001 Action Plan for Reducing, Mitigating, and Controlling Hypoxia in the Northern Gulf of Mexico (Mississippi River/Gulf of Mexico Watershed Nutrient Task Force 2001), incorporating data, publications, and research results produced since the 1999 integrate...

Rosenfeld and Pindell (2002, 2003) hypothesized that the Gulf of Mexico evaporated to a level below the world ocean for a brief interval during the Paleocene-Eocene. Further study and the results of recent drilling support this idea and suggest that a major change in the interpretation of the Gulf’s history may be warranted. The idea originally arose to explain several major Paleocene-Eocene pa...

Abstract The spawning grounds of the Atlantic bluefin tuna ( Thunnus thynnus ) are traditionally considered to be Gulf Mexico (Gulf Mexico) and Mediterranean Sea (Mediterranean Sea). However, for western Atlantic, unequivocal evidence outside has been shown. In this study we present first records genetically confirmed larvae in southern Bay Biscay (eastern Atlantic). These findings provide acti...

Alkyl and multifunctional nitrates (RONO2, 6ANs) have been observed to be a significant fraction of NOy in a number of different chemical regimes. Their formation is an important free radical chain termination step ending production of ozone and possibly affecting formation of secondary organic aerosol. 6ANs also represent a potentially large, unmeasured contribution to OH reactivity and are a ...