Results 211 to 220 of about 4,947 (243)

Living on the edge: Diadema mexicanum in the upper Gulf of California

Marine Biodiversity, 2016
Sea urchins play a crucial role in the health and dynamics of reef ecosystems. Diadema mexicanum is a dominant grazer and erosive agent of the substratum in reef environments in the eastern tropical Pacific. Its reported distribution extends from the middle of the Gulf of California (26° N) to northern Peru (6°23′ S), including oceanic islands.
David A. Paz-García, Omar Valencia-Méndez, Omar Domínguez-Domínguez, Eduardo F. Balart   +3 more
openaire   +1 more source

Shifting environmental and cognitive baselines in the upper Gulf of California

Frontiers in Ecology and the Environment, 2008
Local fishers' knowledge (LFK) obtained from 49 fishers in the upper Gulf of California indicates that fishery resources have declined by at least 60% over the past 50 years, most likely due to overfishing and environmental changes associated with upstream damming of the Colorado River. LFK can provide supporting evidence of trends and changes.
Hector M Lozano-Montes, Tony J Pitcher, Nigel Haggan   +2 more
openaire   +1 more source

Oceanographic analysis of orbital photographs of the upper gulf of California

Photogrammetria, 1973
Abstract Examination of forty-one black and white and color photographs of the upper portion of the Gulf of California obtained during the Gemini and Apollo space missions revealed that hyperaltitude photography of the sea surface can be applied effectively to oceanographic research.
Stephen P. Vonder Haar, Richard O. Stone
openaire   +1 more source

Endangered Species and Precarious Lives in the Upper Gulf of California

Culture & Agriculture, 1997
From a hilltop overlooking the community of Puerto Penasco, Mexican President Carlos Salinas de Gortari decreed a million-hectare biosphere reserve for the upper Gulf of California and the delta of the Colorado River. Assembled with him on the podium in June of 1993 were the governors of Sonora, Baja California, and Arizona, U.S.
Thomas R. McGuire, Gloria Ciria Valdez‐Gardea   +1 more
openaire   +1 more source

On how the colorado river affected the hydrography of the upper Gulf of California

Continental Shelf Research, 1999
The hydrography of the shallow (
M.F. Lavı́n, Salvador Sánchez
openaire   +1 more source

Artisanal Shrimp Fishing in the Biosphere Reserve of the Upper Gulf of California

Crustaceana, 2009
Shrimp is the most important marine resource for the three communities of the Upper Gulf of California (UGC): San Felipe in the state of Baja California, and Golfo de Santa Clara and Puerto Penasco in the state of Sonora. This fishery generates 80% of the profits in the region. A fishery tendency analysis was made from 1996 to 2007 in the UGC.
Gerardo Rodríguez-Quiroz, E. Alberto Aragón-Noriega, Alfredo Ortega-Rubio   +2 more
openaire   +1 more source

Distribution of Penaeid Shrimp Larvae and Postlarvae in the Upper Gulf of California

Crustaceana, 2010
This study describes the distribution pattern of penaeid shrimp larvae and postlarvae in the Upper Gulf of California (UGC) to confirm the trajectories of early stage penaeid shrimp seeking nursery areas, as described by mathematical models. A research cruise was used to sample the total area of the UGC during the major spawning season.
M. Salvador Galindo-Bect, E. Alberto Aragón Noriega, J. Martín Hernández-Ayón, Miguel Lavín, Miguel Huerta Diaz, Francisco Delgadillo Hinojosa, José Segovia Zavala   +6 more
openaire   +1 more source

Larval fish habitats and hydrography in the Biosphere Reserve of the Upper Gulf of California (June 2008)

Continental Shelf Research, 2012
Abstract The Upper Gulf of California (UGC) is a Biosphere Reserve that despite its extreme environmental conditions (macrotidal inverse estuary) houses a high fish species richness. An intensive sampling of fish larvae and hydrography was carried out during June 2008 in the UGC.
Laura Sánchez-Velasco, M F Lavin, Sylvia P A Jiménez-Rosenberg   +2 more
exaly   +2 more sources

Spatial and vertical distributions of elements in sediments of the Colorado River delta and Upper Gulf of California

Marine Chemistry, 2002
The abundance of major components (Fe, Ca, K, and organic carbon) and trace elements was analyzed in surface sediments and core samples from the Colorado River delta (CRD) and the Upper Gulf of California (UGC) using instrumental neutron activation analysis.
Evguéni Shumilin, JOSÉ D Carriquiry, Stepán N Kalmykov   +2 more
exaly   +2 more sources

Response of the shrimp population in the Upper Gulf of California to fluctuations in discharges of the Colorado River

Crustaceana, 2009
Since 1935, the freshwater discharge from the Colorado River into the Gulf of California has decreased drastically, affecting the biological cycles of endemic species and other endangered species. In this study, a relationship was determined between the Colorado River freshwater discharge, the abundance of blue shrimp, Litopenaeus stylirostris ...
Esteban Pérez-Arvizu, E. Alberto Aragón-Noriega, Leticia Espinosa Carreon   +2 more
openaire   +1 more source