Abstract This study analyzed seasonal and interannual variations in larval fish abundance Cabo Pulmo National Park (CPNP) from January 2015 to November 2017, encompassing the 2015–2016 El Niño subsequent thermal relaxation, examine impacts of climate-driven events on abundance, diversity, species richness a no-take marine protected area. A total 166 taxa were identified, spanning 59 families, 94 genera 98 species. Dactyloscopidae spp. (relative frequency: 41.7%; abundance: 9.9%), Auxis...

Tropical cyclones (TCs) are natural systems that develop over ocean basins and key components of the atmospheric activity during warm season. However, there still knowledge gaps about combined positive negative TC impacts on structure function coastal socio-ecosystems. Using remote sensing tools, we analyzed frequency, trajectory, intensity 1894 TCs from 1851–2019 to identify vulnerable “hotspots” across Yucatan Peninsula (YP), Mexico. A total 151 events hit YP, with 96% landings eastern...

Meroplankton abundance (Bivalve larvae, Cirripede larvae and other non-identified larvae), phytoplankton biomass sea surface temperature (SST) from a 15-year time series (1995–2009) in the Cabo Frio region, south-western Atlantic Ocean, were analysed to assess temporal patterns of co-variation. Weekly zooplankton sampling included vertical hauls (∼20m) with 100 µm net, taken triplicate. All data standardized monthly within-year anomalies (n = 180), between-year 12) annual 15). Monthly...

Abstract The Guadalupe fur seal (GFS) currently is recovering from near extinction and prey availability an important factor. Scat stable isotope analyses (SIA) were used to assess GFS foraging on Island during 2013–2016. This period was characterized by normal (2013) ocean temperatures followed warm conditions (2014–2016). samples (~40/year) collected for identification. Additionally, lanugo 1‐month‐old pups (50/year) processed SIA (δ 13 C/δ 15 N). Interannual preferences identified...

Abstract. The Gulf of Ulloa, a highly productive area off the western coast Baja California Peninsula, is examined for five successive years (2003–2007) by using satellite data and seasonal net primary productivity (NPP) estimates obtained from vertical generalised production model. results identify that northwestern winds blow parallel to throughout year. However, highest NPP occurs March June. During this period, an equatorward coastal current transports water neighbouring upwelling areas...

Abstract During the breeding season, seabird foraging trips are constrained by nest attendance schedule and necessarily colony centred. Oceanographic cues play a major role in choice of areas to minimize time spent away from nest. Here, we analysed tracks Black‐vented Shearwaters Puffinus opisthomelas during incubation chick‐rearing periods 2016 2017 at Isla Natividad (Mexico). We applied expectation‐maximization binary clustering track data clusterize different behaviour patterns flights....

We analyzed the response of fish larvae assemblages to environmental variables and physical macro- mesoscale processes in Gulf California, during four oceanographic cruises (winter summer 2005 2007). Physical data water column obtained through CTD casts, sea surface temperature, chlorophyll a satellite imagery were used detect structures. Zooplankton samples collected with standard Bongo net tows. Fish responded latitudinal coastal-ocean gradients, related inflow gulf, biological production....

The distribution of ichthyoplankton assemblages (summer 1999 and winter 2000) from the southern region California Current (CC) off Baja Peninsula were analyzed.Latitudinal ocean-coast limits associated with geostrophic flow, which showed presence cyclonic anticyclonic eddies in northern central Peninsula.The comparative analysis abundance developmental stages (egg to preflexion, flexion, postflexion larval stages), that each mesoscale eddy had a specific assemblage, ichthyogeographic...

Abstract Cephalopod paralarval species richness, abundance and size structure were surveyed wduring an anomalous warm period (2014–2017) in the Cabo Pulmo National Park (CPNP), Gulf of California, Mexico. Paralarval taxa from six families (Cranchiidae, Enoploteuthidae, Ommastrephidae, Onychoteuthidae, Argonautidae Octopodidae) identified. Most tropical biogeographic affinity oceanic habitats. Highest richness occurred during spring associated with northward movement Tropical Surface Water,...

Periodicity is common in natural processes, however, extraction tools are typically difficult and cumbersome to use. Here we report a computational method developed MATLAB through function called Periods with the aim find main harmonic components of time series data. This designed obtain period, amplitude lag phase (Periods can be related climate, social or economic events). It based on methods periodic regression cyclic descent includes statistical significance testing. The proposed very...

Durante el periodo de febrero 2006 a diciembre 2007 se midieron en la superficie del mar 14 estaciones muestreo Bahí­a Magdalena (Baja California Sur, México), con una frecuencia bimestral y bajo condiciones mareas vivas, las concentraciones nitrógeno inorgánico disuelto (NID): nitrito (NO2), nitrato (NO3), amonio (NH4), fosfato (PO4), temperatura (T), salinidad (S) concentración clorofila (Cla). La relación T-S mostró que aguas más frí­as menos salinas generalmente encuentran regiones...

The sailfish Istiophorus platypterus is one of the most common billfish species in Mexican Pacific. Information about its feeding habits coastal region Acapulco, Guerrero extremely limited. In present study we quantified diet sailfish, based on captures made from March 2008 to December 2009 by sport fishing fleet Acapulco. We analysed a total 561 stomachs, which 254 contained food (45%). size interval examined specimens was between 101 and 212 cm postorbital length 15 47 kg weight. general,...

Resumen.-Se investigaron las condiciones oceanográficas que podrían influir en la riqueza y distribución de mamíferos marinos costas del

The use of information net primary productivity (NPP) from remote ocean color sensors is increasingly common in marine sciences. resulting has been used to explain variations at different spatio-temporal scales and the presence climate phenomena, such as El Niño Southern Oscillation, global warming. Satellite sensing data were analyzed Bahía de La Paz (BLP), Mexico, determine variation NPP. In addition, situ hydrographic obtained characterize water properties bay. satellite agree with...

The seasonal variability of gelatinous zooplankton (siphonophores, medusae, and thaliaceans) abundance was investigated at Cabo Pulmo National Park (CPNP) from weekly samples collected throughout 2014. Gulf California had prolonged warming during 2009-2019, with 2014 as the anomalously warm year preceding El Niño 2015-2016 compared to 2003-2020 SST time series. Gelatinous accounted <1% entire community CPNP 2014, suggesting a low influence predation pressure upon their zooplanktonic...

The biological carbon pump is the process that transports vertically out of mixed layer in ocean. Besides sinking flux organic particles, active due to daily vertical migration zooplankton and micronekton promotes a significant transport not fully accounted for or understood world’s oceans. diversity abundance epipelagic mesopelagic species Gulf California has been extensively studied, but role export yet investigated. We studied promoted by juvenile adult fishes crustaceans (Decapoda...

Six bimonthly surveys during 2007 were carried out in Magdalena Bay (Mexico) spring tide conditions.Spatiotemporal variations of temperature, salinity, nitrite, nitrate, ammonium, phosphate and chlorophyll-a analyzed the Bay.During spring-early summer (April-June) seawaters colder richer new nutrients than autumn winter (February October-December).The coastal upwelling contributes with to Bay, whereas bottom-recycled should be main input autumn-winter period.Thus, availability, dissolved...

Pinniped vibrissae provide information on changes in diet at seasonal and annual scales; however, species-specific growth patterns must first be determined order to interpret these data. In this study, a simple linear model was used estimate the rate of from adult female California sea lions (Zalophus californianus) San Esteban Island Gulf California, Mexico. The δ15N δ13C values do not display marked oscillatory pattern that would permit direct determination time period contained each...

During 2013-2015 a patch of warm water called Warm Blob appeared in the northeastern Pacific, producing several effects at biological and physical level. This event appears to be unique, however, evidence was encountered for another three events similar recent during period from 1854 2017 through analyzing historical anomalies SST Pacific Ocean. Each showed same distinctive spatial pattern —firstly, develops northern south Alaska, gradually spreads southward along coast reaching up Baja...