A5016180651- Marine animal studies overview
- Cephalopods and Marine Biology
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Ocean Acidification Effects and Responses
- Underwater Acoustics Research
- Ichthyology and Marine Biology
- Identification and Quantification in Food
- Arctic and Antarctic ice dynamics
- Marine Biology and Ecology Research
- Toxic Organic Pollutants Impact
- Gut microbiota and health
- Coastal and Marine Management
- Mercury impact and mitigation studies
- Wildlife Ecology and Conservation
- Indigenous Studies and Ecology
- Wildlife-Road Interactions and Conservation
- Maritime Transport Emissions and Efficiency
- Species Distribution and Climate Change
- Turtle Biology and Conservation
- Culinary Culture and Tourism
- Animal Vocal Communication and Behavior
Center for Scientific Research and Higher Education at Ensenada
2015-2024
Universidad Autónoma de Baja California
2003-2023
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2023
Grossmont College
2008
This study investigated the influence of whalewatching boats on behaviour gray whales their migratory route in Todos Santos Bay, near port Ensenada, Baja California, Mexico. The objectives were: (1) to compare swimming direction and velocity presence absence vessels, when other were fishing, cruising or drifting; (2) contribute scientific data improvement regulations for Bay surrounding waters. During winters 1998 1999, theodolite tracking was undertaken from a lighthouse tower located...
Diet is a primary driver of the composition gut microbiota and considered one main routes microbial colonization. Prey identification fundamental for correlating diet with presence particular groups. The present study examined how influenced function Pacific harbor seal (Phoca vitulina richardii) in order to better understand role prey consumption shaping its microbiota. This species good indicator quality local environment due both foraging haul-out site fidelity. DNA was extracted from 20...
Coastal reintroduction sites for California condors (Gymnogyps californianus) can lead to elevated halogenated organic compound (HOC) exposure and potential health impacts due the consumption of scavenged marine mammals. Using nontargeted analysis based on comprehensive two-dimensional gas chromatography coupled time-of-flight mass spectrometry (GC×GC/TOF-MS), we compared HOC profiles plasma from inland coastal scavenging state (CA), mammal blubber CA Gulf off Baja (BC), Mexico. We detected...
Studying how phylogeny influences the composition and functions of microbiotas within animal hosts is essential for gaining insights into connection between genetics, ecology, health in kingdom. However, due to limited comprehensive studies, this influence remains unclear many wild mammals, including Mexican pinnipeds. We employed 16S rRNA gene deep-sequencing investigate impact on gut microbiota four pinniped species inhabiting shores: Pacific harbor seal (
The genetic consequences of species-wide declines are rarely quantified because the timing and extent decline varies across species' range. sea otter (Enhydra lutris) is a unique model in this regard. Their dramatic from thousands to fewer than 100 individuals per population occurred range-wide nearly simultaneously due 18th-19th century fur trade. Consequently, each represents an independent natural experiment recovery after extreme decline. We designed sequence capture probes for 50 Mb...
With the goal of gathering ecological data to develop future cetacean management and conservation plans, distribution, home range, residency bottlenose dolphins (Tursiops truncatus) were studied in central-north Mexican Gulf Mexico. Between July 2005 June 2008, 59 boat surveys carried out for a total 313 h effort at sea. During these surveys, 471 individuals observed 88 different groups. Photographs naturally marked animals resulted 275 photo-identified. Their distribution was homogeneous...
Bahía de los Ángeles is located on the Baja Californian coast of Gulf California, adjacent to Ballenas Channel. The bay receives a dynamic tidal influence from channel but protected by numerous islands. It highly productive that harbors high diversity species, some them such as whale shark (Rhincodon typus). This study describes seasonal variability major zooplankton taxa and copepod cladoceran species between May 2003 October 2004. Copepods were dominant during winter spring (83–99%...
We identified specific areas where fin whales (Balaenoptera physalus) forage on daytime surface swarms of euphausiids in Ballenas Channel, Gulf California. During 2003 and 2004,4 field trips per year were carried out (winter-spring, spring, summer, autumn). Systematic line transects random surveys for conducted small boats (6 m) euphausiid sampled with a Zooplankton net. Fin foraged mostly shallow waters (10–100 off the west south coast Coronado Island observed feeding 18 19 Nyctiphanes...
The high phytoplankton production (PP) of the northern Gulf California (NGC) supports a rich biodiversity and fisheries with yields. NGC is habitat vaquita (Phocoena sinus), cetacean most at risk extinction in world. objective this study to demonstrate that healthy system level primary producers despite lack nutrient input from Colorado River, small size population not attributable collapse its pelagic ecosystem. Information derived satellite sensors (CZCS, SeaWiFS, Aqua-MODIS) was used...
Swimming velocities and breathing rates were measured for migrating gray whales ( Eschrichtius robustus (Lilljeborg, 1861)) at Costa Azul, Baja California, to compare swimming effort of southbound whales, northbound without calves, mothers calves. From December 2004 May 2005, followed using a theodolite determine velocity. Binoculars used count whale blows their timings recorded rates. Individual (BR) divided by velocity (V) derive comparative index in units breaths per kilometre. There...
Abstract Coastal habitats are crucial to pinnipeds for resting, molting, and reproduction. We examined terrestrial habitat preferences of four pinniped species (California sea lion, Guadalupe fur seal, harbor northern elephant seal) on the islands off western coast Baja California Peninsula, Mexico. Boat‐based surveys were conducted while circumnavigating 10 or archipelagos during summer winter in 2009 2010. Habitat selection was inferred based generalized linear models using animal counts...
The exceptional growth of whalewatching in Baja California Sur (BCS) and other parts Mexico during the last 10 years motivated design implementation a Mexican law based on experiences BCS. However, recent research Ensenada area confirms that this is insufficient because boats fishing, cruising, or drifting influence behavior (swimming direction velocity) migrating gray whales. In long term, migration corridor might be displaced offshore, may become infeasible. This study proposes management...
For highly mobile species that nevertheless show fine-scale patterns of population genetic structure, the relevant evolutionary mechanisms determining structure remain poorly understood. The bottlenose dolphin (Tursiops truncatus) is one such species, exhibiting complex associated with local habitat dependence in various geographic regions. Here we studied populations Gulf California and Pacific Ocean off Baja where structured to test associations between ecology, differentiation. We...
Pupping and molting of Phoca vitulina are processes that occur each year with high precision, although their timing varies according to location. Knowledge about the these events allows us determine when highest numbers individuals hauled out, which is important achieve a good abundance estimation. In this study we determined pupping P. v. richardii at Punta Banda Estuary, Baja California (Mexico), previously unknown site or along its entire distribution in Mexico. Observations were carried...
Migration is a complex behavior that has evolved in multiple taxonomic groups as means of accessing productive foraging grounds and environmentally stable areas suitable for reproduction. For migratory whales forage throughout the year because their high energetic demands, changes abundance prey different along route(s) can have serious implications individual fitness population viability. Thus, identifying regions these species use to breed while evaluating plasticity at level provide key...
En México no se conoce el tamaño de las poblaciones la tonina (Tursiops truncatus) debido a su granmovilidad y al ocasional intercambio individuos entre poblaciones. El objetivo este estudio fue determinarla abundancia toninas en zona norte Veracruz. De marzo 2005 diciembre 2007 realizaron 50navegaciones con un esfuerzo total 236.7 horas. Los resultados obtenidos foto-identificación toninas, seemplearon modelo Jolly-Seber estimó N=302 ±113 organismos para toda áreade estudio. Para Tamiahua,...
Abstract We document and compare the annual molt of Pacific harbor seal ( Phoca vitulina richardii ) on two islands off west coast Baja California Peninsula that are northern southern extremes its distribution in Mexico. During 2014, observations were made from March to July Todos Santos Island (northern extreme) January June San Roque (southern extreme). On Santos, premolt lasted 15 wk (March–June) 12 (April–July). Roque, 22 (January–June) 17 (February–June). The proportion seals undergoing...