Mario A. PardoCONACYT - Ensenada Center for Scientific Research and Higher Education · Unidad La Paz
Mario A. Pardo
Modeling the habitat, behavior, abundance, and population dynamics of marine megafauna.
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Citations since 2017
14 Research Items
Marine ecologist interested in providing robust base lines for the conservation of marine mega-fauna by studying its responses to various scales of environmental and ecological forcing, in terms of the species' distribution, abundance, population dynamics, and behavior. In our laboratory, the analyses of these processes often involve the inference of parameters under explicit ecological scenarios, represented mainly as Bayesian hierarchical models.
July 2012 - October 2012
NOAA Fisheries, Southwest Fisheries Science Center
- Ph.D. Intern
- Hierarchical Bayesian modeling of the short-beaked common dolphin density in the eastern tropical Pacific as a function of thermocline depth
Highly mobile odontocetes need habitats with environmental conditions with the potential of aggregating enough and high-quality prey, to maximize foraging success. Until now, the characterization of those habitats was in terms of physical and biological indicators of high production, capable of attracting and sustaining prey. Nevertheless, there ha...
We evaluated the effects of sea surface temperature anomalies (SST A) in the southern California Current Ecosystem on the annual Guadalupe fur seal (Arctocephalus townsendi) pup production, a species recovering from near extinction. Pup counts from 1991 to 1993 and from 2006 to 2019 were used to estimate deviations from a long-term trend as a proxy...
The population growth of top predators depends largely on environmental conditions suitable for aggregating sufficient and high-quality prey. We reconstructed numerically the size of a resident population of California sea lions in the Gulf of California during 1978–2019 and its relation with multi-decadal sea surface temperature anomalies. This is...
Fin whales in the Gulf of California constitute a resident population genetically isolated from the rest of the North Pacific Ocean. Its small population size and the scarce information available about its dynamics in a semi-enclosed sea underline the importance of conducting studies about its reproduction. Given the monsoonal regime that dominates...
Migration is a complex behavior that has evolved in multiple taxonomic groups as a means of accessing productive foraging grounds and environmentally stable areas suitable for reproduction. For migratory whales that forage throughout the year because of their high energetic demands, changes in the abundance of prey in different areas along their mi...
This study is the first assessment on how short-finned pilot whales (Globicephala macrorhynchus) move within the Gulf of Mexico. In April 2018, seven adult animals were tagged using location-only satellite transmitters in the south-western Gulf (18°59′N and 95°19′W). When tagged, all animals were in a medium-size aggregation that split after a week...
Migratory marine megafauna generally move vast distances between productive foraging grounds and environmentally stable breeding grounds, but characterizing how they use these habitats to maintain homeostasis and reproduce is difficult. We used isotope analysis of blue whale skin strata (n = 621) and potential prey (n = 300) to examine their migrat...
From fall 2013 through 2015, a large-scale, multi-year warm water anomaly occurred in the northeast Pacific Ocean. The phenomenon had negative impacts on some oceanic predators, including higher mortalities and poor body conditions. We studied the effect of this warm water anomaly on the weight gain of Guadalupe fur seal(Arctocephalus philippii tow...
The Pacific harbor seal (Phoca vitulina richardii) colonies located along the Baja California Peninsula represent the southernmost limit of the species distribution. During certain periods of the year, they congregate on land in coastal zones and islands to nurse or molt. The abundance estimations from Alaska to Baja California have focused their e...
This illustrated guide is intended to aid during touristic observation of marine mammals in the Gulf of California. It includes basic information on the proper ways of aproaching the animals, the forbiden practices, some identification characteristics of each species, their main prey, and their conservation status.
On February 9, 2017, CICESE-ULP and LightHawk conducted an aerial survey in the Gulf of Ulloa, off the Baja California Peninsula, in search for migrating baleen whales and other marine megafauna, with the aim of collecting data suitable for abundance estimation and distribution.
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 seal, and northern elephant seal) on the islands off the western coast of the Baja California Peninsula, Mexico. Boat-based surveys were conducted whi...
We inferred the population densities of blue whales (Balaenoptera musculus) and short-beaked common dolphins (Delphinus delphis) in the Northeast Pacific Ocean as functions of the water-column’s physical structure by implementing hierarchical models in a Bayesian framework. This approach allowed us to propagate the uncertainty of the field observat...
La Paz Bay is a distinct region within the Gulf of California whose rich cetacean community exhibits an intense annual overturn. We studied the environmental conditions that could drive this change over the course of a year. Cetacean biomass was estimated from monthly surveys, with concurrent collection of water-column measurements of temperature,...
Ecological comparison of the same region during four seasonal surveys in two years: one non-El NIño, one extreme El Niño.