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Publications (119)
Background
The red macroalga Gracilaria parvispora is an introduced species in the Mexican Pacific. To date, there are no published studies on its sessile epibionts, including the hydrozoans and bryozoans, which are the dominant epibionts on macrophytes and of significant biological and economic interest.
New information
This study provides insigh...
Sea urchin species are ecologically important in the Gulf of California and are becoming popular as a local fishery due to their commercial value. The most abundant species are Echinometra vanbrunti, Eucidaris thouarsii, and Tripneustes depressus. The objective of this study was to evaluate cadmium, lead, copper, zinc, and iron concentrations, as w...
Some current systematized reviews of macroalgae are concise and descriptive, but it is important to conduct these of a larger number of taxa to facilitate visualizations of the types of primordial research, relevant methods, and areas of opportunity. The aim was to elaborate the state of the art in the taxonomic knowledge of Dictyota based on a sys...
Sea urchin species are ecologically important in the Gulf of California and are becoming popular as a local fishery due their commercial value. The most abundant species are Echinometra vanbrunti , Eucidaris thouarsii , and Tripneustes depressus . The aim of this study was to evaluated cadmium, lead, copper, zinc, and iron concentrations as well as...
Octopus hubbsorum is an important fisheries resource in the Mexican Pacific and a link among different trophic levels due to its ecological role as both predator and prey. In this study, the spatial variations in the diet, isotopic niche and trophic position of O. hubbsorum were determined by analysing digestive contents along with carbon and nitro...
Acanthophora spicifera, a red alga considered an alien species, was discovered for the first time on the Pacific coast of Mexico in 2006 from a locality inside La Paz Bay, Gulf of California. Since then, more records have shown its presence, 17 localities having been added up to 2015. A two-year field study (2020-2022) visiting 31 sites along the c...
This research investigates the accumulation of elements, particularly arsenic, in Sargassum horridum, a species known for its capacity to gather toxic elements. The study observed variability in macro and microelement concentrations over time and between growth stages in Sargassum near a Gulf of California phosphorite deposit. Notably, a generalize...
Los hidroides son animales acuáticos pequeños que pertenecen al filo Cnidaria, grupo taxonómico dentro del cual encontramos corales, anémonas, medusas y pólipos. Pueden vivir sobre diversos sustratos, incluyendo otros organismos vivos, así como materiales naturales y artificiales. Los hidroides logran fijarse a los sustratos por medio de una “raíz”...
The brown alga Sargassum provides a natural substrate occupied by hydrozoans in shallow marine waters. A global count in 2007 listed 39 epibiotic species of Hydrozoa growing on Sargassum, but more studies have been published since, therefore, an update is timely, particularly due to the increased abundance of Sargassum in the Caribbean. This review...
Context: Establishing the roles that different species play within ecosystems is key to understanding how ecosystems function and determining the feeding relationships among species.
Aims: This study analysed the stomach contents of finescale triggerfish, Balistes polylepis, at two sites in the southern Gulf of California, in order to describe its...
This study analyzed the stomach contents of Cortez damselfish, Stegastes rectifraenum, from two sites in the southern Gulf of California to describe its diet. Stomach contents were described using the prey-specific index of relative importance (%PSIRIi), diet width was calculated with Levin’s index, and trophic position using the R package dietr. W...
The purpose of this study is to describe spatial distribution of soil organic carbon (SOC) in mangroves of arid environment and its variability related to the species of mangrove using aerial imagery, supervised classification, and Generalized Additive model (GAM). Samples of soil were analyzed to quantify SOC. Aerial images were acquired using an...
Macroalgae availability is thought to be a major driver of the diet of marine herbivores. In subtropical regions, macroalgal biomass is highly seasonal and the diet of herbivores usually varies accordingly. In Sargassum beds in the Gulf of California, Tripneustes depressus and Eucidaris thouarsii dominate the invertebrate fauna and feed on macroalg...
We reported the accumulation of conservative-type elements (lithium (Li), magnesium (Mg), molybdenum (Mo), antimony (Sb), cesium (Cs), and uranium (U) in pelagic species of Sargassum brown alga (S. fluitans and S. natans). We also included individuals of benthic Sargassum species, inhabiting a reef ecosystem influenced by urban developments and tou...
The seasonal and interannual proximate and sterol composition were assessed in two red (Gelidium robustum, Gelidiaceae and Gracilariopsis sjoestedtii, Gracilariaceae), two brown (Ecklonia arborea, Lessoniaceae and Macrocystis pyrifera, Laminariaceae), and two green (Ulva lactuca and Ulva clathrata, Ulvaceae) macroalgae species and the seagrass Phyl...
This study analyzed the spatial variation of stable isotopes (δ15N and δ13C) and the trophic position of three rocky reef fishes, Balistes polylepis, Stegastes rectifraenum and Kyphosus vaigiensis. According to previous feeding studies, these species are categorized as a benthic carnivore, an omnivore, and an herbivore, respectively. Specimens were...
Since 2014, the Mexican Caribbean beaches have received massive influxes of the brown seaweed Sargassum (S. fluitans III, S. natans I and S. natans VIII), causing serious ecological and economic effects. Concentrations of arsenic (As), cadmium (Cd), copper (Cu), iron (Fe), lead (Pb), and zinc (Zn) were determined over an annual cycle in pelagic Sar...
In the last decade, unprecedented arrivals of pelagic Sargassum (Sargassum influx) have been reported for the Caribbean coasts causing severe ecological and economical affectations and remarking the necessity to characterize the phenomenon. In the north coast of the Mexican Caribbean, spatial characterization of Sargassum influx was performed in te...
Introducción La vida animal y vegetal depende de al menos 23 elementos químicos. Estos elementos que han sido considerados indis-pensables para más de una especie de biota, han sido dividi-dos en dos grupos. El primero que comprende 7 macroele-mentos (calcio, cloro, magnesio, fósforo, potasio, sodio y azufre) y 16 microelementos o elementos traza (...
In the Gulf of California; mineral deposits have contributed to high metal contents in coastal environments. This study examined cadmium; lead; copper; zinc; and iron contents in three fish species; Kyphosus vaigiensis (herbivore), Stegastes rectifraenum (omnivore), and Balistes polylepis (carnivore) at two mining sites. Metal concentrations were a...
The trophic ecology of wetlands with mangrove forests remains poorly understood. Through the use of stomach contents analysis, stable isotope signatures, and Bayesian mixing models, the food web of a tropical wetland in the gulf of California was investigated. Consumers had heterogeneous diets, omnivores were the most abundant species (47%), follow...
Massive accumulations of pelagic species of Sargassum have generated recent social, economic and ecological problems along Caribbean shores. In the Mexican Caribbean, these events have prompted the study of diverse biological and ecological aspects of these macroalgae. However, studies on their associated biota, including Hydrozoa, remain scarce. T...
Background and Aims:
In September 2001, the coral reef of the San Lorenzo Channel, La Paz Bay, Gulf of California, Mexico, was affected by the stranding of the oil tank vessel “Lázaro Cárdenas II”. Soon afterwards, hurricane “Juliette” hit the area with strong winds and water movement, disturbing the reef again. After that, three zones could be obs...
Arid zone mangroves of the southwestern Gulf of California provide ecosystem services because of their habitat heterogeneity, structure, and functions, which are important for the formation of fish assemblages. Structure, litterfall production, and leaf decomposition in three mangrove communities located at La Paz Bay, Mexico, were analyzed. Litter...
Se presentan los resultados más sobresalientes de las diversas investigaciones que el Centro de Investigaciones Biológicas del Noroeste, S. C. ha llevado a cabo en torno al tema de los efectos de las redes de arrastre en los fondos marinos del Golfo de California. El enfoque con que ha sido abordado el problema es multidisciplinario e interinstituc...
The wavy turban snail, Megastraea undosa ( W. Wood), is an important fishery resource along the Mexican Pacific coast and a keystone species in subtropical rocky reefs. Its diet was determined from stomach contents of 125 specimens collected in three rocky reefs of the western coast of the Baja California Peninsula in July and November 2006 and Mar...
Ulva blooms are highly productive ephemeral communities that occur in coastal systems, associated with nutrient enrichment. The objective was to estimate variations in succession, cover, recruitment and length of Ulva species in four blooms and assess their relationship with environmental parameters in Bahía de La Paz, Baja California Sur. At each...
Diet of the volcano keyhole limpet Fissurella volcano was determined from stomach contents of 56 specimens collected from two rocky reefs along the west coast of the Baja California Peninsula of Mexico in July and November 2006 and March 2007. We identified 40 taxa, including 27 diatoms, one cyanoprokaryota, eight macroalgae (mainly red algae), one...
The aim of the study was to evaluate the dynamic of cadmium, lead, copper, zinc, and iron among lower trophic levels, sea urchins and macroalgae. Diets and isotopic values were used in combination to explore trophic positions and potential transference of metals from primary producers to consumers. Concentrations of trace elements were measured in...
Antecedentes:
El último inventario floristico de algas marinas de Isla Guadalupe se publicó en la década de 1980, e incluye una recopilación de trabajos de colecciones de principios del siglo pasado.
Objetivos:
Realizar un inventario y un análisis actualizado de la comunidad de macroalgas de Isla Guadalupe.
Métodos:
Se efectuaron cuatro muestreos...
The wavy turban snail Megastraea undosa and keyhole limpet Megathura crenulata, two gastropods with commercial importance, five macroalgae, and one seagrass were collected at Bahía Tortugas, Baja California Sur, Mexico, for analysis of stable isotope ratios. The δ13C and δ15N isotope signatures obtained from gastropod muscle tissue were different b...
2016. Macroalgas marinas bentónicas de Isla Guda-lupe, Baja California, México. Hidrobiológica 26 (2): 213-223. RESUMEN Antecedentes. El último inventario florístico de algas marinas de Isla Guadalupe se publicó en la década de 1980, e incluye una recopilación de trabajos de colecciones de principios del siglo pasado. Objetivos. Realizar un inventa...
The nutritional condition of juveniles and subadults of the California spiny lobster (Panulirus interruptus) from 2 sites along the west coast of the Baja California Peninsula, near each other but with contrasting environmental conditions were compared. The northern site presents subtropical environmental conditions and the southern has semi-temper...
One of the bottlenecks in cultivating juvenile green abalone Haliotis fulgens is the lack of well-adapted natural or formulated food for optimal growth. The goal of this study was to analyse the digestive gland structure of juvenile green abalone fed rehydrated natural feed, Ulva sp. (Chlorophyta), Eisenia arborea, Macrocystis pyrifera, Egregia men...
Within the marine environment, the rocky shores are recognized for their high species diversity and particularly transitional zones represent areas of biotic mix, promoted by historical and ecological natural variations that allow the presence of taxa from different regions and which present dissimilar biological traits. An extensive survey describ...
The fatty acid composition of macrophytes is usually quite stable among different taxonomic groups, and thus, several fatty acids can been used as biomarkers. However, variations between species can be affected by seawater temperature and other ambient factors. With higher annual temperatures, we expect less polyunsaturated fatty acids, and changes...
The fatty acid composition of macrophytes is usually quite stable among different taxonomic groups, and thus, several fatty acids can been used as biomarkers. However, variations between species can be affected by seawater temperature and other ambient factors. With higher annual temperatures, we expect less polyunsaturated fatty acids, and changes...
Los equinoideos contribuyen en la modulación de las comunidades que habitan, de ahí radica su importancia ecológica y la necesidad de estudiarlos. Los erizos T. depressus (pardo o bola) y E. thouarsii (punta de lápiz) llegan a dominar la fauna asociada a mantos de Sargassum spp. de la Bahía de La Paz, BCS. Se sabe que ambas especies incluyen macroa...
Concentrations of cadmium (Cd), lead (Pb), copper (Cu), zinc (Zn) and iron (Fe) were measured in three macroalgal species, Codium simulans, Sargassum sinicola and Gracilaria pachydermatica, and in the sea slug Elysia diomedea, living in marine ecosystems dominated by Sargassum species and located near exploited phosphorite deposits. Metal concentra...
The efficiency of batch and continuous systems of copper removal by Sargassum sinicola was studied. The effects of flow rate, initial metal concentration, and bed density on the capacity of the continuous system were also recorded. In batch systems, the maximum biosorption capacity was calculated as 49.63 ± 0.88 mg g−1; in the continuous system, un...
Impreso y hecho en México / Printed in Mexico. "Las opiniones expresadas por los autores (textos, figuras y fotos) no necesariamente reflejan la postura de las instituciones editoras de la publicación". Ninguna parte de esta obra puede ser reproducida o trasmitida, mediante ningún sistema o método electrónico o mecánico sin autorización por escrito...
The diet of the keyhole limpet Megathura crenulata was determined from stomach contents of 119 specimens collected from 3 rocky reefs on the west coast of the Baja California Peninsula, Mexico, in July and November 2006 and March 2007. Limpet stomachs contained 78 taxa, including filamentous cyanobacteria, diatoms, brown and red algae, marine seagr...
Se presentan los resultados más sobresalientes de las diversas investigaciones que el Centro de Investigaciones Biológicas del Noroeste, S. C. ha llevado a cabo en torno al tema de los efectos de las
redes de arrastre en los fondos marinos del Golfo de California.El enfoque con que ha sido abordado el problema es multidisciplinario e interinstituci...
Macroalgae play an important role in the ecology of the marine environment. They form the base of the food webs, and represent the major food source for a variety of organisms. In order to assess their potential nutritional value, the antioxidant and trace element content (vitamin C, total polyphenols, zinc, iron, cooper, selenium, cadmium and lead...
En la región la pesca del camarón se lleva a cabo
con redes de arrastre, las cuales tienen gran
impacto sobre el sedimento y los organismos del
bentos. Se ha observado, que además de la pesca
incidental de especies de peces, se encuentran
otras especies tales como macroalgas y esponjas.
En arrastres con redes camaroneras, se encontraron 13 especies...
We evaluated the fish community structure in three mangrove systems from la Paz bay, southwestern gulf of California, mexico, during two annual cycles separated by 30 yrs (1980–1981 and 2009–2010). The three mangrove system have suffered different degrees of anthropogenic impact that range from relatively pristine (Balandra) to minor impacts from d...
A stomach content analysis was undertaken to determine the changes in the natural diet of the green abalone Haliotis fulgens as they relate to the 1997 to 1998 El Nino event at 2 sites along the central coast of the Baja California Peninsula. The index of relative importance of each identified food item was calculated, and Levin's index was used to...
We describe the assemblage of cyanobacteria and macroalgae on Avicennia germinans pneumatophores, Rhizophora mangle aerial roots, and within the tidal channel of a mangrove located in a lagoon bordering the east coast of the Baja California Peninsula, from samples collected every 2 months from May 2005 to May 2006. A total of 68 species were found:...
The Gulf of California is an important eco-region with 52 coastal lagoons that are affected by the different anthropogenic activities in their surrounding areas. Several studies in the region have reported seasonal changes in macroalgal biomass, and some have suggested that these changes may be associated with nutrient enrichment. However, research...
We evaluated the contribution of beta (β) diversity of macroalgal assemblages in subtropical rocky reefs of the Gulf of California. Seasonal samplings of macroalgae were taken in six sites from 2005 to 2008. We identified 157 species, with a local richness [alpha (α) diversity] between 8 and 38 species, with the lowest values in fall. Additive part...
Brown algae Sargassum sinicola and Sargassum lapazeanum were tested as cadmium biosorbents in coastal environments close to natural and enriched areas of phosphorite ore. Differences
in the concentration of cadmium in these brown algae were found, reflecting the bioavailability of the metal ion in seawater
at several sites. In the laboratory, maxim...
Larval and early juvenile development was studied in Tegula eiseni (Jordan, 1936) for 63 days under laboratory conditions at temperatures of 20 ± 2°C in order to have a photographic sequence of the stages that help identify wild early juvenile specimens. Larvae were obtained by induced spawning. Postlarvae and juveniles were fed Nannochloropsis ocu...
An experimental study of the effect of artificial nutrient supply on understory algae was made during 1997 El Niño Southern
Oscillation (ENSO) at the Mexican Pacific coast of Baja California. Twelve quadrats of 1m2 were placed on the sea bed. Six quadrats were used as controls, and six were treatments with added artificial nutrients.
Nutrients were...
Seaweed associated to mangrove is important as primary producers, refuge, and feeding areas for invertebrate and fish species. In the peninsula of Baja california the total nomber and distribution of the associated species in these ecosystems was unknown. the objective of this research was to compile the existing information on seaweed species dive...
A trophic structure model of the rocky coastal ecosystem in Bahia Tortugas, Mexico was constructed using Ecopath software to represent the main biomass flows in the system. Data for the model came from field observations (biomass estimates, stomach contents, and ecological observations for sea snails, abalones, lobster, some demersal finfishes, and...
Arid mangroves constitute a particular biotope, with very extreme variations in ecological conditions, mainly temperature and salinity, condition that demand specific adaptations to successfully inhabit this ecosystem.
Cyanoprokaryotes have not been well studied in Mexican coasts and this is the first study that contributes to the
knowledge of the...
