scholarly journals PROLIFERATION OF Amphidinium carterae (GYMNODINIALES: GYMNODINIACEAE) IN BAHÍA DE LA PAZ, GULF OF CALIFORNIA

2012 ◽  
Vol 27 (2) ◽  
pp. 37 ◽  
Author(s):  
I. Gárate -Lizárraga
Keyword(s):  
Gulf Of California ◽  
New Records ◽  
Seawater Temperature ◽  
Prorocentrum Minimum ◽  
Benthic Species ◽  
La Paz ◽  
Amphidinium Carterae ◽  
The Pacific

During a sampling on 15 December 2011 in Bahía de La Paz, a bloom of the benthic dinoflagellate Amphidinium carterae was detected. Its abundance ranged from 28.2 to 64.8 × 103 cells L–1. Cells of A. carterae varied in length from 18 to 28 μm and 13 to 18 μm in wide (n = 30). The presence of A. carterae and benthic species of diatoms and dinoflagellates at the surface could be an indicator of upwelling water generated by northwestern winds. Seawater temperature during the bloom was 20 °C. Also, new records of dinoflagellates for the Mexican coast of the Pacific are here reported: Amphidiniopsis hirsuta, Amphidiniopsis sp., Amylax buxus, Cochlodinium pulchellum, Cochlodinium virescens, Durinskia cf. baltica, Gyrodinium sp., Thecadinium sp., and Prorocentrum minimum var. triangulatum. Proliferación de Amphidinium carterae (Dinophyceae: Gymnodiniales) en Bahía de La Paz, Golfo de California Durante un muestreo realizado el 15 de Diciembre de 2011 en Bahía de La Paz se detectó un florecimiento del dinoflagelado bentónico Amphidinium carterae. Los valores de abundancia variaron de 28.2 a 64.8 × 103 céls L–1. Los especímenes de A. carterae presentaron un intervalo de tallas de 18 a 28 μm de longitud y de 13 a 18 μm de ancho (n = 30). La presencia de A. carterae, así como de especies bentónicas de diatomeas y dinflagelados en superficie podrían indicar aguas de surgencia debido a la influencia de los vientos del noroeste en esta temporada. La temperatura del agua durante el florecimiento fue de 20 °C. También se reportan nuevos registros de dinoflagelados para la costa pacífica de México: Amphidiniopsis hirsuta, Amphidiniopsis sp., Amylax buxus, Cochlodinium pulchellum, Cochlodinium virescens, Durinskia cf. baltica, Gyrodinium sp., Thecadinium y Prorocentrum minimum var. triangulatum.

scholarly journals Species Composition and New Records of Diatom Taxa on Phyllodictyon pulcherrimum (Chlorophyceae) from the Gulf of California

Diversity ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 339
Author(s):  
Francisco Omar López-Fuerte ◽  
David Alfaro Siqueiros Beltrones ◽  
María del Carmen Altamirano-Cerecedo
Keyword(s):  
Gulf Of California ◽  
New Records ◽  
American Continent ◽  
Epiphytic Diatoms ◽  
Taxonomic Analysis ◽  
The North ◽  
The Pacific ◽  
The Pacific Ocean ◽  
First Time ◽  
The North Pacific

A taxonomic analysis of diatoms found on Phyllodictyon pulcherrimum yielded a total of 244 diatom taxa (all illustrated) within 27 orders, 45 families, and 86 genera. The Taxa were briefly documented in a list including identification references and morphometric data. Thirty-eight of the taxa identified at the species and infraspecific levels represent new records for the coasts of Mexico. Seven were recorded for the first time on the American continent: Auricula flabelliformis, A. pulchra, Campylodiscus scalaris, Coscinodiscus mesoleius, Dimeregramma fulvum, Navicula palpebralis var. angulosa, and Seminavis barbarae, and one, Nitzschia fusiformis, for the Pacific Ocean. This is the second record of the chlorophyte P. pulcherrimum in the north Pacific and the third for Mexican waters. The results confirm that surveying rare macroalgae species as hosts for epiphytic diatoms provides opportunities to seek new records of diatom taxa, or even new taxa, in regions around the world.

Taxonomy and diversity of Hydrozoa (Cnidaria, Medusozoa) of La Paz Bay, Gulf of California

Zootaxa ◽  
2020 ◽  
Vol 4808 (1) ◽  
pp. 1-37
Author(s):  
MARÍA A. MENDOZA-BECERRIL ◽  
MARIAE C. ESTRADA-GONZÁLEZ ◽  
ALEJANDRA MAZARIEGOS-VILLARREAL ◽  
LUISA RESTREPO-AVENDAÑO ◽  
ROGELIO D. VILLAR-BELTRÁN ◽  
...  
Keyword(s):  
Phylogenetic Relationships ◽  
Gulf Of California ◽  
New Records ◽  
Species Boundaries ◽  
La Paz ◽  
Mexican Pacific ◽  
Taxonomic Descriptions

The Mexican Pacific has been the focus of several research expeditions, with 90 species of hydromedusae and more than 200 species of hydroids recorded for the region. However, only a few of these reports include taxonomic descriptions, hindering inferences of the phylogenetic relationships, species boundaries, and diversity of Hydrozoa in Mexican waters. In this study, we present detailed and illustrated descriptions of new records of hydromedusae and hydroids for La Paz Bay, Gulf of California. We found a total of 16 species comprising 15 genera, with three new records for the Gulf of California (polyps of Antennella secundaria, Bimeria vestita, and Ventromma halecioides), two new records for the Mexican Pacific (medusa of Clytia linearis, polyp of Halopteris violae), and we redescribe Obelia tenuis. We show that the diversity of Hydrozoa in the Mexican Pacific is likely underestimated, and we emphasize the importance of taxonomic and systematic studies of hydroids and hydromedusae in Mexico. 

scholarly journals BLOOM OF Gonyaulax spinifera (DINOPHYCEAE: GONYAULACALES) IN ENSENADA DE LA PAZ LAGOON, GULF OF CALIFORNIA

2014 ◽  
Vol 29 (1) ◽  
pp. 11
Author(s):  
I. Gárate -Lizárraga ◽  
Ma. S. Muñetón -Gómez ◽  
B. Pérez -Cruz ◽  
J. A. Díaz -Ortíz
Keyword(s):  
Species Richness ◽  
Gulf Of California ◽  
Phytoplankton Community ◽  
Seawater Temperature ◽  
Low Frequency ◽  
Wind Forcing ◽  
La Paz ◽  
Tidal Water ◽  
High Species Richness ◽  
Water Accumulation

During a sampling on 24 September 2012 in the coastal lagoon, Ensenada de La Paz, a small bloom of the dinoflagellate Gonyaulax spinifera was detected. Its abundance varied from 401 to 1342 × 103 cells L–1. Cells of G. spinifera ranged from 34 to 50 μm in length and 22 to 35 μm in width (n = 30). Seawater temperature and salinity were 29 °C and 35.5, respectively. The species composition of the bloom was recorded. The phytoplankton community had high species richness, resulting from a mix of benthic and pelagic diatoms and dinoflagellates, as well as cyanobacteria that occurred with low frequency. This brief proliferation lasted around three hours and may have been caused by tidal water accumulation along the shore. Although G. spinifera is a producer of yessotoxin, no fish or invertebrates were apparently killed by this bloom, which was rapidly dispersed by tides and wind-forcing. Florecimiento de Gonyaulax spinifera (Dinophyceae: Gonyaulacales) en la laguna Ensenada de La Paz, Golfo de California Durante un muestreo el 24 de septiembre de 2012 en la laguna costera Ensenada de La Paz se detectó un pequeño florecimiento del dinoflagelado Gonyaulax spinifera. Los valores de abundancia variaron de 401 a 1342 × 103 céls L–1. Los especímenes de G. spinifera presentaron un intervalo de tallas de 34 a 50 μm de longitud y de 22 a 35μm de ancho (n = 30). La temperatura del agua fue de 20 °C y la salinidad fue de 35.5. Se determinó la composición de especies durante este florecimiento. Como resultado de la mezcla de especies bentónicas y pelágicas de diatomeas y dinoflagelados, así como de algunas cianobacterias poco frecuentes, la comunidad del fitoplancton presentó una riqueza de especies alta. Esta pequeña proliferación se observó por alrededor de 3 horas y pudo ser ocasionada por la marea acumulándola en la línea de costa. Aunque G. spinifera es una especie productora de yessotoxinas, no se observaron peces ni invertebrados muertos durante este florecimiento, el cual se dispersó rápidamente por efecto de la marea y la fuerza del viento.

Reproductive strategy of the Pacific cownose ray Rhinoptera steindachneri in the southern Gulf of California

2019 ◽  
Vol 70 (1) ◽  
pp. 93 ◽  
Author(s):  
María I. Burgos-Vázquez ◽  
Valeria E. Chávez-García ◽  
Víctor H. Cruz-Escalona ◽  
Andrés F. Navia ◽  
Paola A. Mejía-Falla
Keyword(s):  
Gulf Of California ◽  
Size At Maturity ◽  
Annual Reproductive Cycle ◽  
La Paz ◽  
Cownose Ray ◽  
Large Size ◽  
Median Size ◽  
Disc Width ◽  
Gill Net ◽  
The Pacific

Rhinoptera steindachneri is one of the most common batoid species in the artisanal gill net fishery of the Gulf of California. In this study we investigated its reproductive biology based on 317 specimens caught in Bahía de la Paz, Mexico. Females measured up to 94.2-cm disc width (DW) and males reached 82.5cm DW; there were no significant differences in size or weight between sexes. The median size at maturity was estimated at 68.5cm DW for males and 71.8cm DW for females, and the median size at pregnancy was 84.3cm DW. Only the left ovary and uterus were functional; a maximum of six preovulatory vitellogenic follicles per female was recorded, although uterine fecundity was one embryo per female. Ovulation and birth occurred in May, June and July, with birth sizes ranging from 38.1 to 42cm DW. R. steindachneri in Bahía de la Paz exhibited low fecundity, large size at maturity and birth and a continuous and synchronous annual reproductive cycle.

Littoral Maeridae and Melitidae (Amphipoda: Gammaridea) from the Gulf of Tehuantepec, Mexico

Zootaxa ◽  
2010 ◽  
Vol 2623 (1) ◽  
pp. 1 ◽  
Author(s):  
MARÍA DEL SOCORRO GARCÍA-MADRIGAL
Keyword(s):  
New Species ◽  
Gulf Of California ◽  
New Records ◽  
Galapagos Islands ◽  
Eastern Pacific ◽  
Galápagos Islands ◽  
Tropical Eastern Pacific ◽  
The North ◽  
The Pacific ◽  
Gulf Of Tehuantepec

In the Tropical Eastern Pacific region, the gammaridean amphipods of the families Maeridae and Melitidae are represented by 28 species and 11 genera; the genus Elasmopus is the richest, with 13 species. The examination of approximately 3,250 specimens resulted in 12 new records from the Gulf of Tehuantepec, belonging to four genera, Elasmopus, Maera, Quadrimaera and Melita. All species are illustrated and described. Seven new species are described as: Elasmopus bastidai n. sp., Elasmopus karlae n. sp., Elasmopus lecroyae n. sp., Elasmopus marcelae n. sp., Elasmopus oaxaquensis n. sp., Maera umarae n. sp., and Melita bousfieldi n. sp. With these new species the genus Elasmopus from the Tropical Eastern Pacific is increased to 18 species that corroborates the hypothesis of Barnard (1979) “on the Pacific there are (sic) a mark of speciation of genus Elasmopus”. In addition, there are five new records from the Gulf of Tehuantepec: three species of Elasmopus and two of Quadrimaera. Also, the range distribution of Elasmopus temori Barnard and E. zoanthidea Barnard, is increased to the north from the Galapagos Islands to the Gulf of Tehuantepec; for E. tubar Barnard, Quadrimaera chinarra Barnard, and Q. reishi Barnard, there are new intermediate records between the Gulf of California and the Galapagos Islands. With the exception of the species of Quadrimaera, all known species represent the second record in the region after their first descriptions.

scholarly journals Mercado regional en el Golfo de California (1848-1910)

2016 ◽  
Vol 13 (22) ◽  
Author(s):  
Alfonso Guillén Vicente
Keyword(s):  
Gulf Of California ◽  
18Th Century ◽  
The South ◽  
La Paz ◽  
Regional Market ◽  
Industrial Sectors ◽  
The Pacific ◽  
Siglo Xix ◽  
Livestock Products ◽  
The 19Th Century

Resumen:El comercio marítimo que apareció en el Golfo de California a finales del siglo X V I I I, se afianzó en las primeras décadas del siglo XIX merced a la navegación de altura que tuvo como eje el puerto de San Blas, Nayarit, y al intercambio efectuado por las naves que cubrían los diversos destinos de la región con productos agrícolas y pecuarios. Su despegue definitivo, sin embargo, ocurrió con motivo de la fiebre del oro en California, que permitió el establecimiento de rutas regulares que tocaban los puertos de Guaymas, Mazatlán y La Paz . El propio desarrollo urbano de estas localidades constituyó un mercado interesante para los buques de vapor que se movían a lo largo del Pacífico. Los comerciantes locales se hicieron así de un respetable capital que invirtieron en otros sectores productivos de la región, además de fortalecer los lazos establecidos entre ellos. La entrada del ferrocarril a Sonora en la década de los ochenta del siglo XIX no eclipsó por completo a Guaymas, que por todo el resto de la centuria conservó un papel relevante como centro comercial regional. En la medida que el caballo de hierro abatió sus costos y se acreditó entre los sectores minero e industrial sonorenses y, sobretodo, cuando el Sudpacífico continuó su marcha hacia el Sur, al entrar en Sinaloa, el importante mercado regional del Golfo de California cayó de manera significativa.Palabras clave: comercio marítimo, navegación de altura, fiebre del oro en California , ferro carril, comercio en el Mar de Cortez.Abstract:Maritime trade that emerged in the Gulf of California in the late 18th century consolidated during the first decades of the 19th century thanks to deep-sea navigation, whose axis was the port of San Blas, Nayarit, as well as to trade carried out by the ships transporting agricultural and livestock products to the various destinations of the region. How ever, it took off once and for all owing to the gold fever in California, which allowed establishing regular routes that called at the ports of Guaymas, Mazatlán y La Paz. The urban development itself of these localities was a interesting market for the steamships sailing across the Pacific. Local merchants thus obtained a considerable capital which they invested in other productive sectors of the region, as well as strengthening the ties established among them. The arrival of the railroad in Sonora in the 1880s didn’t eclipse Guaymas completely, which played a important role as a regional business center for the rest of the century. As the Iron Horse reduced its costs and gained a good reputation among the Sonora mining and industrial sectors, and, above all, when the South Pacific carried on toward the south, arriving in Sinaloa, the important regional market of the Gulf of California fell significantly.Palabras clave: sea trade, ocean navigation, California gold fever, railroads, Cortez Sea trade.

Checklist of reef decapod crustaceans (Crustacea: Decapoda) in the southern Gulf of California, México

Zootaxa ◽  
2009 ◽  
Vol 2119 (1) ◽  
pp. 39-50 ◽  
Author(s):  
LUIS HERNÁNDEZ ◽  
EDUARDO F. BALART ◽  
HÉCTOR REYES-BONILLA
Keyword(s):  
Species Richness ◽  
Gulf Of California ◽  
New Records ◽  
Scuba Diver ◽  
Decapod Crustaceans ◽  
La Paz ◽  
Reef Community ◽  
Suitable Area ◽  
Reef Fauna

Recent studies of reef fauna near La Paz bay and Loreto bay in the Gulf of California have promoted interest in recognize the assemblages of invertebrates close to the reefs. Crustaceans that inhabit coral heads have received little attention because of their small size. Additionally, the methods used in evaluating the reef community need to be carefully managed to avoid damaging the corals. A list of forty-four decapods species found at La Paz and Loreto areas is presented. Quarterly sampling trips were made from May 2004 to July 2008. At each area, six sites were selected because the coral substrate covered a suitable area. The marked survey sites were traversed by a SCUBA diver and censuses of conspicuous invertebrates were made. Attempts to avoid disturbing any aspect of the habitat was of primary importance. Of the 44 species recorded, just 20 species were common to both areas. Species richness for the two areas showed 70.9% similarity. Range extensions and new records for some species are presented.

scholarly journals Seasonal steroid variations in relation to maturity stages in the female Pacific red snapper Lutjanus peru in the Gulf of California, Mexico

2018 ◽  
Vol 31 ◽  
pp. 34
Author(s):  
Silvie Dumas ◽  
Silvia Ramirez Luna ◽  
Pablo Pintos Terán ◽  
Evaristo Mañanos ◽  
Lluis Tort
Keyword(s):  
Gulf Of California ◽  
Gonadosomatic Index ◽  
Gonadal Development ◽  
Reproductive Period ◽  
Red Snapper ◽  
Plasma Testosterone ◽  
La Paz ◽  
The Pacific ◽  
Surrounding Areas ◽  
Fishery Species

Reproductive steroid concentration and gonadal development as well as plasma cortisol were investigated during the reproductive period (April to October) of the Pacific red snapper Lutjanus peru, a commercial and important local fishery species in the surrounding areas of Bahía La Paz, Gulf of California, Mexico. Gonads in April were immature and characterized by the presence of oocytes at the chromatin nucleolar and perinucleolar stages. In the next month, more than 50% of the fish showed gonads in vitellogenesis, characterized by the presence of cortical alveoli and early vitellogenic (V1) oocytes. Late vitellogenic and mature gonads were present in July, August and September. Postovulatory follicles were observed only in gonads collected in August, indicating spawning activity of these individuals. The gonadosomatic index (GSI) increased significantly (p <0.05) from April and May to July, when it reached its maximum value. A significant increase (p <0.05) in plasma testosterone (T) was also observed in July compared to previous months, and plasma estradiol (E2) concentration was significantly higher (p <0.05) in September than in April. Cortisol concentration was significantly higher (p <0.05) in September than in May. Significant differences (p <0.05) between gonadal stages were observed for GSI and E2 but not for T. We conclude that the Pacific red snapper, in the surrounding areas of Bahía de la Paz, showed an asynchronous ovarian growth starting in May when water temperature increased and that was characterized by several spawning events.

scholarly journals PROLIFERATION OF Levanderina fissa AND Polykrikos hartmannii (DINOPHYCEAE: GYMNODINIALES) IN BAHÍA DE LA PAZ, GULF OF CALIFORNIA, MÉXICO

2014 ◽  
Vol 29 (2) ◽  
pp. 25 ◽  
Author(s):  
I. Gárate -Lizárraga
Keyword(s):  
Gulf Of California ◽  
Phytoplankton Community ◽  
Red Tide ◽  
Symbiotic Association ◽  
La Paz ◽  
Phytoplankton Species Composition ◽  
The Pacific ◽  
Synechococcus Sp ◽  
Levanderina Fissa ◽  
First Time

On 19–20 August 2014, a moderate proliferation of dinoflagellates was detected in the southwestern part of Bahía de La Paz. The phytoplankton community within this red tide was composed of 60 microalgae taxa and was characterized by the presence of unarmored dinoflagellates such as Levanderina fissa and Polykrikos hartmannii. The proliferation occurred during low tide after a period of windy and rainy days. Densities of L. fissa varied from 163 to 265 × 103 cells L–1 and for P. hartmannii varied from 16 to 33 × 103 cells L–1. Low densities were estimated on September and October samplings. Both species showed a great variation both in size and form. As part of the phytoplankton species composition during this proliferation, two taxa of dinoflagellates are new records for the Pacific coast of Mexico (Ankistrodinium semilunatum and Sclerodinium calyptroglyphe), one in the Gulf of California (Pronoctiluca acuta), and one in the Bahía de La Paz (Prorocentrum robustum). Cyanobacteria were an important group observed during this proliferation. The symbiotic association between a cyanobacterium Synechococcus sp., the stramenopile protist Solenicola setigera, and the diatom Leptocylindrus mediterraneus was observed for the first time in this bay. Proliferación de Levanderina fissa y Polykrikos hartmannii (Dinophyceae: Gymnodiniales) en Bahía de La Paz, Golfo de California, México Se detectó una proliferación moderada de dinoflagelados en la porción suroeste de la Bahía de La Paz del 19 al 20 de agosto de 2014. La comunidad del fitoplancton dentro de este florecimiento estuvo compuesta de 60 taxa y se caracterizó por la dominancia de Levanderina fissa y Polykrikos hartmannii. La proliferación ocurrió durante la marea baja y después de días lluviosos. La abundancia de L. fissa varió de 163 a 265 × 103 céls L–1 y P. hartmannii varió de 16 a 33 × 103 céls L–1 . Densidades bajas fueron estimadas durante los muestreos de septiembre y octubre. Ambas especies mostraron una gran variación en su forma y su tamaño celular. Como resultado de la composición especifica del fitoplancton encontrado durante esta proliferación, dos taxa de dinoflagelados fueron nuevos registros para la costa Pacífica de México (Ankistrodinium semilunatum y Sclerodinium calyptroglyphe), un taxón para el Golfo de California (Pronoctiluca acuta) y un taxón para la Bahía de La Paz (Prorocentrum robustum). Las cianobacterias fueron un grupo importante durante esta proliferación. La asociación simbiótica entre una cianobacteria Synechococcus sp., el protista stramenopiles Solenicola setigera y la diatomea Leptocylindrus mediterraneus se observó por primera vez en la bahía.

scholarly journals NUEVOS REGISTROS DE DINOFLAGELADOS DESNUDOS PARA EL GOLFO DE CALIFORNIA, MÉXICO

2007 ◽  
Vol 22 (1-2) ◽  
pp. 37 ◽  
Author(s):  
I. Gárate-Lizárraga ◽  
G. Verdugo-Díaz
Keyword(s):  
Gulf Of California ◽  
New Record ◽  
New Records ◽  
La Paz ◽  
Mexican Pacific ◽  
Rare Taxa

Se presentan cuatro nuevos registros de dinoflagelados y el reporte de dos dinoflagelados desnudos planctónicos para la Bahía de La Paz y el Golfo de California. Los Brachidiniales Asterodinium gracile y Brachidinium sp. son nuevos registros para el Pacífico Mexicano y Brachidinium capitatum es nuevo registro para el Golfo de California. Se conoce poco acerca de la distribución y morfología de estas especies ya que son raras y se han reportado en pocas ocasiones. A. gracile y Kofoidinium pavillardii son consideradas especies de la flora de sombra. En este trabajo se documentaron fotográficamente todas las especies. New records of naked dinoflagellates from the Gulf of California, Mexico Four new records of naked planktonic dinoflagellate and two rare taxa were found in Bahía de La Paz, Gulf of California. The Brachidiniales Asterodinium gracile and Brachidinium sp. are new records for the Mexican Pacific and Brachidinium capitatum is a new record for the Gulf of California. Little is known about the distribution and morphology of these species since they are rare and have been scarcely reported in the worldwide literature. A. gracile and Kofoidinium pavillardii are considered as members of the shade flora. All species are photographically documented.

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