Gulf of California - Sea of Cortez Modern Sailing Expeditions
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Shrimp Fishing in Mexico
235 Shrimp fishing in Mexico Based on the work of D. Aguilar and J. Grande-Vidal AN OVERVIEW Mexico has coastlines of 8 475 km along the Pacific and 3 294 km along the Atlantic Oceans. Shrimp fishing in Mexico takes place in the Pacific, Gulf of Mexico and Caribbean, both by artisanal and industrial fleets. A large number of small fishing vessels use many types of gear to catch shrimp. The larger offshore shrimp vessels, numbering about 2 212, trawl using either two nets (Pacific side) or four nets (Atlantic). In 2003, shrimp production in Mexico of 123 905 tonnes came from three sources: 21.26 percent from artisanal fisheries, 28.41 percent from industrial fisheries and 50.33 percent from aquaculture activities. Shrimp is the most important fishery commodity produced in Mexico in terms of value, exports and employment. Catches of Mexican Pacific shrimp appear to have reached their maximum. There is general recognition that overcapacity is a problem in the various shrimp fleets. DEVELOPMENT AND STRUCTURE Although trawling for shrimp started in the late 1920s, shrimp has been captured in inshore areas since pre-Columbian times. Magallón-Barajas (1987) describes the lagoon shrimp fishery, developed in the pre-Hispanic era by natives of the southeastern Gulf of California, which used barriers built with mangrove sticks across the channels and mouths of estuaries and lagoons. The National Fisheries Institute (INP, 2000) and Magallón-Barajas (1987) reviewed the history of shrimp fishing on the Pacific coast of Mexico. It began in 1921 at Guaymas with two United States boats. -
HIKING TRAILS SOUTH SUNSHINE COAST Sunshinecoastcanada.Com
HIKING TRAILS SOUTH SUNSHINE COAST sunshinecoastcanada.com Local Favourites ROBERTS CREEK heritage graveyard on the Sechelt First Nations band land at the east end. CLIFF GILKER PARK TRAILS ACCESS: From Highway 101 in Sechelt, access the walk- LENGTH & DIFFICULTY: 7 km of trails | 15 min to 2.5 hrs | way from Shorncliffe, Ocean, Trail, Inlet, or Wharf Avenues. GIBSONS Moderate Trails are colour coded and easy to follow and all loop back BURNETT FALLS GIBSONS SEAWALL to the parking lot. The park is a largely advanced second LENGTH & DIFFICULTY: 10-15 min one way | Very Easy LENGTH & DIFFICULTY: 20-30 min one way | Easy growth Douglas Fir forest. Roberts Creek and Clack Creek A short walk with a bit of an incline that ends at a spectacular Paved waterfront walkway with views of Gibsons Marina, flow through this park. The trails cross them at various view of the waterfall. points on rustic wooden bridges and the waterfall is a high- Gibsons Harbour, Keats Island and North Shore moun- ACCESS: 5396 Burnett Rd. From Sechelt, go north on light (especially in the winter time). Wheelchair accessible tains. Just steps away from shops and restaurants in Lower Wharf Ave. At the 4-way stop, turn right onto East Porpoise viewing platform. Gibsons. Bay Rd. Take a right turn on Burnett Rd. and park at the end. ACCESS: There are access points along Marine Drive and ACCESS: Follow Hwy 101 west from Gibsons for 10 km or Trailhead will be visible. Gower Point Road in Gibsons, including Armours Beach, drive east on Hwy 101 from Sechelt. -
Latin American Biogems: the Baker River Snakes Through Chilean Patagonia from the Glacial Lakes of the Andes to Fjords on the Pacific Coast
Facts Foott, 2009, The Patagonian Foundation and iLCP and Foundation Patagonian The 2009, Foott, The Baker River snakes through Chilean Patagonia from the glacial lakes of the Andes to fjords on the Pacific coast. Latin American BioGems: Saving Special Wild Places and Wildlife NRDC’s BioGems Initiative protects endangered wild regions and species throughout the Americas. In Latin America, NRDC has worked to preserve BioGems unspoiled ecosystems and threatened wildlife from Mexico’s Baja Peninsula to Chile’s Patagonia, working in partnership with communities and organizations to eliminate threats and to find environmentally sustainable alternatives. For more information, please contact: Baja California, n Cabo Pulmo: Cabo Pulmo National Marine Amanda Maxwell Mexico Park is home to the healthiest and most [email protected] To the east of the important coral reef of the Baja Peninsula, (202) 289-2368 Baja Peninsula, the home to humpback whales, dolphins, whale Gulf of California, sharks, Pacific manta rays and five species of sea Carolina Herrera which Jacques turtles, as well as more than 200 species of fish. [email protected] Cousteau called Hopkins Lee Ralph Now a Spanish real estate company is proposing (202) 289-2381 Humpback whale “the aquarium of a massive 9,500 acre resort complex next to the world,” provides shelter for hundreds of species the park. Since October 2010, NRDC has of fish, sea turtles and marine mammals. NRDC been working with a local coalition to stop this is working with Mexican partners to protect Baja’s industrial tourism development and to promote fragile marine life from a variety sustainable tourism alternatives. -
Why Did the Southern Gulf of California Rupture So Rapidly?—Oblique Divergence Across Hot, Weak Lithosphere Along a Tectonically Active Margin
Why did the Southern Gulf of California rupture so rapidly?—Oblique divergence across hot, weak lithosphere along a tectonically active margin breakup, is mainly dependent on the thermal structure, crust- Paul J. Umhoefer, Geology Program, School of Earth Sciences & Environmental Sustainability, Northern Arizona University, al thickness, and crustal strength of the lithosphere when Flagstaff, Arizona 86011, USA; [email protected] rifting begins (e.g., Buck, 2007), as well as forces at the base of the lithosphere and far-field plate interactions (Ziegler and Cloetingh, 2004). ABSTRACT Continental rupture at its two extremes creates either large Rifts in the interior of continents that evolve to form large ocean basins or small and narrow marginal seas depending oceans typically last for 30 to 80 m.y. and longer before com- largely on the tectonic setting of the rift. Rupture of a conti- plete rupture of the continent and onset of sea-floor spreading. nent that creates large oceans most commonly initiates as A distinct style of rifts form along the active tectonic margins of rifts in old, cold continental lithosphere or within former continents, and these rifts more commonly form marginal seas large collisional belts in the interior of large continents, part and terranes or continental blocks or slivers that are ruptured of the process known as the Wilson Cycle (Wilson, 1966). away from their home continent. The Gulf of California and the Rupture to create narrow marginal seas commonly occurs in Baja California microplate make up one of the best examples active continental margins and results in the formation of of the latter setting and processes. -
Our Ocean Backyard –– Santa Cruz Sentinel Columns by Gary Griggs, Director, Institute of Marine Sciences, UC Santa Cruz
Our Ocean Backyard –– Santa Cruz Sentinel columns by Gary Griggs, Director, Institute of Marine Sciences, UC Santa Cruz. #45 January 2, 2010 Why Monterey Submarine Canyon? Monterey Submarine Canyon forms a deep gash beneath the waters of Monterey Bay. At the risk of beating submarine canyons to death, I’m going to try to wrap up this discussion with some final thoughts on why we have one of the world’s largest submarine canyons in our backyard. Monterey Submarine Canyon has been known for over a century, and as with other offshore drainage systems, there has been considerable speculation over the years as to why we have this huge chasm cutting across the seafloor. Most submarine canyons align with river systems, but Elkhorn Slough hardly provides an adequate onshore source for such a massive feature. We do know that prior to 1910 the Salinas River discharged six miles north of its present mouth into Elkhorn Slough, closer to the head of Monterey Submarine Canyons. But even the Salinas River is not of the scale we would expect for an offshore feature as large as the Grand Canyon. Over 50 years ago, two geologists discovered the presence of a deep buried inland canyon beneath the Santa Cruz Mountains from oil company drill holes. This combined with other geological and geophysical observations strongly suggested that this canyon was eroded by an ancient river drainage system that played a critical role in the initial formation of the Monterey Submarine Canyon. This buried canyon, named Pajaro Gorge by some, was the route that the drainage from California’s vast Central Valley followed to the ocean for million of years. -
Wetland Loss in the Lower Galveston Bay Watershed
Galveston Bay Wetland Permit and Mitigation Assessment Lisa Gonzalez Dr. Erin Kinney Dr. John Jacob Marissa Llosa Transportation Stream & Wetland Mitigation Peer Exchange – June 5-6, 2018 Galveston Bay Watershed ~24,000 square miles ~Half of Texas’ population of 28M TXDOT Districts Beaumont Houston Population Growth 213 % 59 % 65 % * 119 % * 54 % 239 % 106 % 89 % % Change in Population 1990 to 2017 Data Source: U.S. Census, *Texas Demographic Center Population Projection Regional Habitat H-GAC Eco-Logical Map; Wetland Mitigation Opportunities white paper, 2014 Regional Land Cover Change; 1996-2010 • Growth in impervious (107K acres) & developed (254K acres) areas • Wetland net change -54K acres NLDC, NOAA C-CAP Coastal Bottomlands and Blue Elbow Mitigation Banks Mitigation Bank Mitigation Bank HUC8 ORMII Permits ORMII Permits Galveston Bay Mitigation Banks TCWP Ground-truth Wetland Mitigation Assessment • 17 sites: 4 permit mitigation sites not accessible, leaving 13 permits for site review (8 PRM, 5 MB). • Assessment criteria based on three-fold definition of a wetland (Tiner, 1989): – Hydrophytic vegetation (partially or completely submerged in water), – Evidence of hydrology, – Soil indicators consistent with wetland hydrology. • Conservative assessment: – Success: “reasonably wet” with recognizable wetland plants and hydric soils. – Failure: substandard compensatory mitigation site with a lack of any evidence for wetland mitigation TCWP Ground-truth Wetland Mitigation Assessment • Minimum 5% of the total mitigation site inventoried. • Plots (10 m x 10 m) representatively within the tract. • Plant species presence and percent cover assessed. • Cover of various biotic and abiotic surface materials collected in each plot. • Comprehensive list of species compiled. • Pictures of the site and the sample plot taken along with any notable site features. -
Baja California Sur, Mexico)
Journal of Marine Science and Engineering Article Geomorphology of a Holocene Hurricane Deposit Eroded from Rhyolite Sea Cliffs on Ensenada Almeja (Baja California Sur, Mexico) Markes E. Johnson 1,* , Rigoberto Guardado-France 2, Erlend M. Johnson 3 and Jorge Ledesma-Vázquez 2 1 Geosciences Department, Williams College, Williamstown, MA 01267, USA 2 Facultad de Ciencias Marinas, Universidad Autónoma de Baja California, Ensenada 22800, Baja California, Mexico; [email protected] (R.G.-F.); [email protected] (J.L.-V.) 3 Anthropology Department, Tulane University, New Orleans, LA 70018, USA; [email protected] * Correspondence: [email protected]; Tel.: +1-413-597-2329 Received: 22 May 2019; Accepted: 20 June 2019; Published: 22 June 2019 Abstract: This work advances research on the role of hurricanes in degrading the rocky coastline within Mexico’s Gulf of California, most commonly formed by widespread igneous rocks. Under evaluation is a distinct coastal boulder bed (CBB) derived from banded rhyolite with boulders arrayed in a partial-ring configuration against one side of the headland on Ensenada Almeja (Clam Bay) north of Loreto. Preconditions related to the thickness of rhyolite flows and vertical fissures that intersect the flows at right angles along with the specific gravity of banded rhyolite delimit the size, shape and weight of boulders in the Almeja CBB. Mathematical formulae are applied to calculate the wave height generated by storm surge impacting the headland. The average weight of the 25 largest boulders from a transect nearest the bedrock source amounts to 1200 kg but only 30% of the sample is estimated to exceed a full metric ton in weight. -
Coastal Land Loss and Wktlanb Restoration
COASTAL LAND LOSS AND WKTLANB RESTORATION tSI R. E. Turner estuaryare causallyrelated to the landlosses this sealevel ri se,climate change~, soil type,geomorphic century." I then comparethe strengthof this frameworkand age, subsidence or tnanagement. hypothesisto someof theother hypothesized causes of land loss on this coast, There are laboratoryand Four Hypotheses small-scale field trials that support various hypotheses,It seemsto me thatthe mostreliable Four hypothesesabout the causes of indirect interpretationsare basedon what happensin the wetlandlosses in BaratariaBay will be addressed field, andnot on the resultsof computermodels, here adapted from Turner 1997!: laboratorystudies or conceptualdiagrams. H l. i ct n ences of The test results discussed herein are derived t !tin oil banks v d solelyfrom data derived at a landscapescale. The 'ori of 1 loss sin h data set is restricted to a discussion of the Barataria watershed. This watershed is a significant H2. componentof theLouisiana coastal zorie 14,000 lv ha!and there are a varietyof habitatdata available i tl on it. Its easternboundary is the MississippiRiver from whichoccasional overflowing waters are v n.vi hypothesizedto deliver enoughsediinents and on 1 v tno I freshwaterto significantlyinfluence the balanceof rit f i land lossor gain in the receivingwatershed, and whosere-introduction would restore the estuary's wetlands. Improvingour understandingof the H4. w rin si ecologicalprocesses operating in this watershed h ' ' of mightassist in the managementof others. The effect of geologicalsubsidence and sea DIrect and Indirect Causes of Wetland Loss level rise are not included in this list because both factorshave remained relatively stablethis century Wetlandloss is essentiallythe same as land loss when the land-loss rates rose and fell, Local on thiscoast Baurnann and Turner 1990!. -
Uplift of Quaternary Shorelines in Eastern Patagonia: Darwin Revisited
Uplift of Quaternary shorelines in Eastern Patagonia: Darwin revisited Kevin Pedoja, Vincent Regard, Laurent Husson, Joseph Martinod, Benjamin Guillaume, Enrique Fucks, Maximiliano Iglesias, Pierre Weill To cite this version: Kevin Pedoja, Vincent Regard, Laurent Husson, Joseph Martinod, Benjamin Guillaume, et al.. Uplift of Quaternary shorelines in Eastern Patagonia: Darwin revisited. Geomorphology, Elsevier, 2011, 127 (3-4), pp.121-142. 10.1016/j.geomorph.2010.08.003. insu-00610899 HAL Id: insu-00610899 https://hal-insu.archives-ouvertes.fr/insu-00610899 Submitted on 6 Mar 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution| 4.0 International License Uplift of quaternary shorelines in eastern Patagonia: Darwin revisited Kevin Pedoja a,⁎, Vincent Regard b,c,d, Laurent Husson e,f, Joseph Martinod b,c,d, Benjamin Guillaume g, Enrique Fucks h, Maximiliano Iglesias i, Pierre Weill a a Laboratoire de Morphodynamique Continentale et Côtière, CNRS, Université de Caen, 14000 Caen, France b Université de Toulouse ; UPS (OMP) ; LMTG ; 14 Av Edouard Belin, F-31400 Toulouse, France c IRD ; LMTG ; F-31400 Toulouse, France d CNRS ; LMTG ; F-31400 Toulouse, France e CNRS UMR 6118, Géosciences Rennes, 35042 Rennes, France f CNRS UMR 6112, Laboratoire de Planétologie et Géodynamique de Nantes, France g Dip. -
Brief History Timeline 2018 (PDF)
TIMELINE ~ BRIEF HISTORY OF SUGARLOAF COVE, SICA, AND SUGARLOAF: THE NORTH SHORE STEWARDSHIP ASSOCIATION 10,000 P.C. Scattered archeological finds indicate Paleo-Indians occupy the area around Lake Superior’s North Shore after the final retreat of glaciers in the last Ice Age (Pleistocene Epoch). A variety of indigenous peoples inhabit the area over thousands of years. 1600s French explorers have the first contact with indigenous peoples in the area in the early to mid-1600s. Fur trade between native tribes and the French, British, and Dutch flourishes in the 1700s and early 1800s. 1854 The Ojibwe, who were established by then as the primary native tribe in northeastern Minnesota, cede substantially all the Arrowhead region, including Sugarloaf Cove, to the federal government in the Second Treaty of La Pointe, opening the area to European settlement. Settlers, mostly Scandinavian, flock to the North Shore and began commercial fishing and logging operations. 1880s Extensive logging begins in Cook County, including depletion of old growth red and white pine around Sugarloaf Cove. 1899 The John Gunderson family from Norway homesteads Sugarloaf Cove property. 1902 Consolidated Water Power & Paper Company of Wisconsin (“Consolidated”) begins a pulp paper business in Rhinelander (name changed to Consolidated Papers in 1962). 1909 The Superior National Forest is established. 1920s In 1923, Consolidated begins harvesting wood from Canada and rafting pulpwood logs across Lake Superior to Ashland for transport to Rhinelander for processing. In 1925, Consolidated acquires a large tract of timberland in Cook County from which to harvest pulpwood (mostly spruce, jack pine, and balsam fir). -
Mathematical Model of Groynes on Shingle Beaches
HR Wallingford Mathematical Model of Groynes on Shingle Beaches A H Brampton BSc PhD D G Goldberg BA Report SR 276 November 1991 Address:Hydraulics Research Ltd, wallingford,oxfordshire oxl0 gBA,United Kingdom. Telephone:0491 35381 Intemarional + 44 49135381 relex: g4gsszHRSwALG. Facstunile:049132233Intemarional + M 49132233 Registeredin EngtandNo. 1622174 This report describes an investigation carried out by HR Wallingford under contract CSA 1437, 'rMathematical- Model of Groynes on Shingle Beaches", funded by the Ministry of Agri-culture, Fisheries and Food. The departmental nominated. officer for this contract was Mr A J Allison. The company's nominated. project officer was Dr S W Huntington. This report is published on behalf of the Ministry of Agriculture, Fisheries and Food, but the opinions e>rpressed are not necessarily those of the Ministry. @ Crown Copyright 1991 Published by permission of the Controller of Her Majesty's Stationery Office Mathematical model of groSmes on shingle beaches A H Brampton BSc PhD D G Goldberg BA Report SR 276 November 1991 ABSTRACT This report describes the development of a mathematical model of a shingle beach with gro5mes. The development of the beach plan shape is calculated given infornation on its initial position and information on wave conditions just offshore. Different groyne profiles and spacings can be specified, so that alternative gro5me systems can be investigated. Ttre model includes a method for dealing with varying water levels as the result of tidal rise and fall. CONTENTS Page 1. INTRODUCTION I 2. SCOPEOF THE UODEL 3 2.t Model resolution and input conditions 3 2.2 Sediment transport mechanisms 6 2.3 Vertical distribution of sediment transport q 2.4 Wave transformation modelling L0 3. -
Is the Gulf of Taranto an Historic Bay?*
Ronzitti: Gulf of Taranto IS THE GULF OF TARANTO AN HISTORIC BAY?* Natalino Ronzitti** I. INTRODUCTION Italy's shores bordering the Ionian Sea, particularly the seg ment joining Cape Spartivento to Cape Santa Maria di Leuca, form a coastline which is deeply indented and cut into. The Gulf of Taranto is the major indentation along the Ionian coast. The line joining the two points of the entrance of the Gulf (Alice Point Cape Santa Maria di Leuca) is approximately sixty nautical miles in length. At its mid-point, the line joining Alice Point to Cape Santa Maria di Leuca is approximately sixty-three nautical miles from the innermost low-water line of the Gulf of Taranto coast. The Gulf of Taranto is a juridical bay because it meets the semi circular test set up by Article 7(2) of the 1958 Geneva Convention on the Territorial Sea and the Contiguous Zone. 1 Indeed, the waters embodied by the Gulf cover an area larger than that of the semi circle whose diameter is the line Alice Point-Cape Santa Maria di Leuca (the line joining the mouth of the Gulf). On April 26, 1977, Italy enacted a Decree causing straight baselines to be drawn along the coastline of the Italian Peninsula.2 A straight baseline, about sixty nautical miles long, was drawn along the entrance of the Gulf of Taranto between Cape Santa Maria di Leuca and Alice Point. The 1977 Decree justified the drawing of such a line by proclaiming the Gulf of Taranto an historic bay.3 The Decree, however, did not specify the grounds upon which the Gulf of Taranto was declared an historic bay.