SMALL-SCALE SHRIMP FISHING IN SEARCH OF SUSTAINABILITY IN THE MAGDALENA-ALMEJAS LAGOON SYSTEM, BAJA CALIFORNIA SUR, MÉXICO: A REVIEW

The coastal lagoon system Bahía Magdalena / Almejas (BM/A) at the Pacific coast of Baja California Sur, México, is a large water body extremely important for ecological, economic and social reasons. Because of its natural environment BM/A was declared as one of the areas deserving marine conservation priority. The exact number of fishermen and their families living around the Bay is not known, and neither is the currently registered small boats in service, nor the fishing efforts, expenses and yields. Recently, several civil organizations started working in the BM/A with the mission to solve some of the identified environmental and social problems. However, because of the lack of reliable data, wide spread corruption, and undirected and uncoordinated research make it very difficult to suggest ways to improve the livelihood of the small-scale shrimp fishermen without endangering the environment. Some promising options are small-scale aquaculture projects, mainly for off-shore mollusks production, and to offer eco-tourist activities as well as eco-friendly sport fishing. Both bring local employment opportunities while maintaining a quality environment. En busca de sustentabilidad de la pesquería de camarón a baja escala en el sistema lagunar Magdalena-Almejas Baja California Sur, México: una revisión El sistema lagunar Bahía Magdalena / Almejas (BM/A) ubicado en la costa oeste de Baja California Sur, México, es un cuerpo de agua de extrema importancia bajo las perspectivas ecológica, económica y social. Dado su ambiente natural, BM/A es considerada un área prioritaria en términos de conservación marina. Se desconoce cuántas familias de pescadores viven entorno a la bahía, así como el número registrado de embarcaciones pequeñas en activo, el esfuerzo pesquero, sus gastos, o su rendimiento. Recientemente, varias organizaciones civiles comenzaron labores en BM/A bajo la consigna de resolver algunos de los problemas ambientales y sociales identificados. Sin embargo, debido a la falta de datos confiables y a la corrupción, aunados a investigación mal dirigida y sin coordinación, dificultan la posibilidad de sugerir maneras de mejorar la sustentabilidad de la pesca menor de camarón sin poner en riesgo el ambiente. Algunas alternativas prometedoras son los proyectos acuaculturales a pequeña escala, principalmente para producción de moluscos lejos de la costa, así como las actividades ecoturísticas y la pesca deportiva ecológicamente amigable, dado que ambas abren oportunidades de empleo locales conservando la calidad del ambiente.

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MORFOLOGÍA Y SEDIMENTOS DE LA PLAYA Y PLATAFORMA DE LA BAHÍA SAN LUCAS, BAJA CALIFORNIA SUR, MÉXICO

CICIMAR Oceánides ◽

10.37543/oceanides.v24i1.49 ◽

2009 ◽

Vol 24 (1) ◽

pp. 1

Author(s):

J. O. Navarro Lozano ◽

E. H. Nava Sánchez ◽

L. Godinez-Orta ◽

J. Murillo-Jimenez

Keyword(s):

Baja California ◽

Submarine Canyon ◽

High Energy ◽

Baja California Sur ◽

Seafloor Topography ◽

Sediment Distribution ◽

Wave Refraction ◽

Portion Control ◽

The Pacific ◽

El Sistema

Bahía San Lucas está localizada en la punta sur de la Península de Baja California, por lo que recibe el oleaje de alta energía del Océano Pacífico. El análisis morfológico y sedimentológico del litoral y del fondo marino de la Bahía San Lucas, a partir del levantamiento batimétrico y del análisis de los parámetros texturales del sedimento permitió conocer la relación que existe entre las geoformas y el comportamiento sedimentológico. La morfología y orientación de las puntas que protegen a la bahía, así como la presencia temporal del abanico-delta El Salto en la porción central de la misma, condicionan los procesos de refracción y difracción del olaje. Así, el litoral de la bahía se puede dividir en dos zonas, en donde los procesos energéticos del oleaje y agente transportante son diferentes entre ellas y determinan la morfología y distribución de sedimentos en el sistema playero. El relieve del fondo marino de la bahía está dominado por la presencia del cañón submarino San Lucas, cuya cabecera se proxima hasta el pie de la playa, en la zona más interna de la bahía. Dicho cañón condiciona el desarrollo de la plataforma, la cual es de sólo 1.5 km de ancho, con profundidad máxima de 50 m. La poca profundidad de la plataforma, que permite que el oleaje interactúe con el fondo, así como la presencia del cañón submarino, condicionan la distribución de sedimentos del fondo marino de la bahía. Morphology and sediments of the beach and shelf of the Bahía San Lucas, Baja California Sur, México Bahía San Lucas is located at the southern tip of the Baja California peninsula, thus it receives high energy waves from the Pacific Ocean. The morphology of the coastline and marine bottom of the bay was interpreted based on a bathymetric survey and beach profiles, while the characteristics of the sediments were obtained through a textural analysis. Both, morphology and sedimentology allowed us to know the relationship between landforms and the sedimentological behavior. The geometry and orientation of the limiting points of the bay and the temporary presence of the fan-delta El Salto in the central portion, control the processes of wave refraction and diffraction. Thus, the coastline of the bay can be divided into two areas, where the wave energy processes and the transporting agent are different from each other and determine the morphology and sediment distribution of the beach. Seafloor topography of the bay is dominated by the presence of the San Lucas submarine canyon, whose head is just at the foot of he beach, in the innermost area of the bay. This canyon controls the development of the peninsular shelf, which is only 1.5 km wide with a maximum depth of 50m. This shallow depth of the shelf, which allows the waves interact with seabed, and the presence of the submarine canyon are the responsible for the distribution of sediments in the seabed of the bay.

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Seasonal and Bathymetric Changes in Feeding Habits of the Benthic Red Crab Pleuroncodes Planipes (Decapoda, Anomura, Galatheidae) Off the Pacific Coast of Baja California Sur, Mexico

Crustaceana ◽

10.1163/156854097x00573 ◽

1997 ◽

Vol 70 (3) ◽

pp. 272-287 ◽

Cited By ~ 15

Author(s):

David Aurioles-Gamboa ◽

Ricardo Pérez-Flores

Keyword(s):

Baja California ◽

Pacific Coast ◽

Feeding Habits ◽

Baja California Sur ◽

The Pacific ◽

Bathymetric Changes

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A new genus of cassiduloid echinoid from the lower Eocene of the Pacific coast of western North America and a new report of Cassidulus ellipticus Kew, 1920, from the lower Eocene of Baja California Sur, Mexico

Journal of Paleontology ◽

10.1017/s0022336000034892 ◽

1995 ◽

Vol 69 (3) ◽

pp. 509-515 ◽

Cited By ~ 1

Author(s):

Richard L. Squires ◽

Robert A. Demetrion

Keyword(s):

North America ◽

New Genus ◽

Baja California ◽

Pacific Coast ◽

Middle Part ◽

Baja California Sur ◽

Western North America ◽

Lower Eocene ◽

Shallow Marine ◽

The Pacific

The cassiduloid echinoid Calilampas californiensis n. gen. and sp. is described from middle lower Eocene (“Capay Stage”) shallow-marine sandstones in both the middle part of the Bateque Formation, Baja California Sur, Mexico, and the lower part of the Llajas Formation, southern California. The new genus is tentatively placed in family Pliolampadidae. The cassiduloid Cassidulus ellipticus Kew, 1920, previously known only from the “Capay Stage” in California, is also present in “Capay Stage” shallow-marine sandstones of the Bateque Formation.

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The artisanal elasmobranch fishery of the Pacific coast of Baja California Sur, Mexico, management implications

Scientia Marina ◽

10.3989/scimar.03817.05a ◽

2013 ◽

Vol 77 (3) ◽

pp. 473-487 ◽

Cited By ~ 35

Author(s):

Felipe Galvan-Magaña ◽

Sergio R. Ramirez-Amaro ◽

Daniel Cartamil ◽

Gerardo Gonzalez-Barba ◽

Jeffrey B. Graham ◽

...

Keyword(s):

Baja California ◽

Pacific Coast ◽

Baja California Sur ◽

Management Implications ◽

The Pacific

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Middle Eocene terebratulide brachiopods from the Bateque Formation, Baja California Sur, Mexico

Journal of Paleontology ◽

10.1017/s0022336000026901 ◽

1995 ◽

Vol 69 (1) ◽

pp. 45-51 ◽

Cited By ~ 1

Author(s):

Michael R. Sandy ◽

Richard L. Squires ◽

Robert Demetrion

Keyword(s):

North America ◽

Baja California ◽

Pacific Coast ◽

Middle Eocene ◽

Central American ◽

Baja California Sur ◽

Invertebrate Fauna ◽

The West ◽

The Pacific ◽

Central American Seaway

Two species of terebratulide brachiopods are described from the upper part of the Bateque Formation (middle Eocene) on the Pacific coast of Baja California Sur, Mexico, Terebratulina cf. Terebratulina louisianae Stenzel, 1940, and Terebratalia batequia n. sp. Terebratalia batequia n. sp. is the earliest confirmed record of the genus Terebratalia Beecher, 1893, which has been an important component of Pacific brachiopod faunas through to the present day. The occurrence of Terebratulina cf. Terebratulina louisianae Stenzel is one of the earliest records of the genus from the west coast of North America. These brachiopods, like other elements of the Bateque invertebrate fauna, may record Eocene migration from the Atlantic to Pacific Ocean via the Central American seaway.

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Fisheries connectivity measures of adaptive capacity in small-scale fisheries

ICES Journal of Marine Science ◽

10.1093/icesjms/fsab178 ◽

2021 ◽

Author(s):

Keiko Nomura ◽

Jameal F Samhouri ◽

Andrew F Johnson ◽

Alfredo Giron-Nava ◽

James R Watson

Keyword(s):

Adaptive Capacity ◽

Baja California ◽

Pacific Coast ◽

Fishing Communities ◽

Small Scale ◽

Small Scale Fisheries ◽

Income Sources ◽

The Pacific ◽

Network Metrics ◽

Coast Region

Abstract Small-scale fisheries (SSFs) around the world are increasingly facing pressures from a range of environmental, economic, and social sources. To sustain SSFs, it is imperative to understand how fishing communities adapt to these pressures. In particular, to manage economic risks fishers often catch many different species; diversifying harvest portfolios creates multiple income sources in case one species becomes less abundant, less valuable, or otherwise unavailable. Here, we apply fisheries connectivity network analysis to assess the portfolios and potential adaptive capacity of small-scale fishing communities in the Baja California Peninsula (BCP), Mexico. We found that network metrics like modularity and density varied by region and through time. The Pacific coast region of Baja California displayed increasingly modular fisheries connectivity networks, indicating fisheries landings became increasingly asynchronous with each other and the potential adaptive capacity increased. The remaining three regions of Baja California showed the opposite trend, where the temporal covariance between fisheries increased over time. Overall, this study shows that the potential adaptive capacity of fishing communities varies substantially throughout the BCP, and highlights how fisheries connectivity networks can offer a way to quantify and advance our understanding of adaptive capacity within small-scale fishing communities.

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Uranium-Series Ages of Marine Terrace Corals from the Pacific Coast of North America and Implications for Last-Interglacial Sea Level History

Quaternary Research ◽

10.1006/qres.1994.1055 ◽

1994 ◽

Vol 42 (1) ◽

pp. 72-87 ◽

Cited By ~ 54

Author(s):

Daniel R. Muhs ◽

George L. Kennedy ◽

Thomas K. Rockwell

Keyword(s):

North America ◽

Sea Level ◽

Baja California ◽

Pacific Coast ◽

Baja California Sur ◽

Marine Terrace ◽

San Nicolas Island ◽

Uranium Series ◽

Marine Terraces ◽

The Pacific

AbstractFew of the marine terraces along the Pacific coast of North America have been dated using uranium-series techniques. Ten terrace sequences from southern Oregon to southern Baja California Sur have yielded fossil corals in quantities suitable for U-series dating by alpha spectrometry. U-series-dated terraces representing the ∼80,000 yr sea-level high stand are identified in five areas (Bandon, Oregon; Point Arena, San Nicolas Island, and Point Loma, California; and Punta Banda, Baja California); terraces representing the ∼125,000 yr sea-level high stand are identified in eight areas (Cayucos, San Luis Obispo Bay, San Nicolas Island, San Clemente Island, and Point Loma, California; Punta Bands and Isla Guadalupe, Baja California; and Cabo Pulmo, Baja California Sur). On San Nicolas Island, Point Loma, and Punta Bands, both the ∼80,000 and the ∼125,000 yr terraces are dated. Terraces that may represent the ∼105,000 sea-level high stand are rarely preserved and none has yielded corals for U-series dating. Similarity of coral ages from midlatitude, erosional marine terraces with coral ages from emergent, constructional reefs on tropical coastlines suggests a common forcing mechanism, namely glacioeustatically controlled fluctuations in sea level superimposed on steady tectonic uplift. The low marine terrace dated at ∼125,000 yr on Isla Guadalupe, Baja California, presumed to be tectonically stable, supports evidence from other localities for a +6-m sea level at that time. Data from the Pacific Coast and a compilation of data from other coasts indicate that sea levels at ∼80,000 and ∼105,000 yr may have been closer to present sea level (within a few meters) than previous studies have suggested.

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