Gorgonio RuizcamposAutonomous University of Baja California | UABC · Departamento de Biología (Facultad de Ciencias de Ensenada)
Gorgonio Ruizcampos
PhD
Professor-Researcher in Zoology with an emphasis in Ichthyology and Ornithology
About
291
Publications
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Introduction
Taxonomy, systematics and biogeography of fishes in northern Mexico.
Distribution and taxonomy of birds from northwestern Mexico.
Taxonomy, ecology and conservation of native trouts.
Additional affiliations
February 1983 - present
Education
January 1990 - December 1993
Publications
Publications (291)
Intertidal ecology has been considered the cradle of modern marine ecology with insightful investigations on the biological and ecological mechanisms allowing “life between the tides”. Most of the early investigations focused on macrophytes (seagrasses and macroalgae) and benthic invertebrates inhabiting emerged intertidal substrata. However, tidep...
The population density of the endemic trout (Oncorhynchus mykiss nelsoni) of the Sierra San Pedro Mártir, Baja California, Mexico was evaluated. The relationship of population density with physicochemical and structural variables of the habitat in three streams with differential altitude (553 to 2069 meters above sea level), between February 2014 a...
La sardinilla peninsular, Fundulus lima (Vaillant, 1894) es una especie íctica perteneciente a la familia Fundulidae y al orden Cyprinodontiformes. Es una de las dos especies dulceacuícolas endémicas de la península de Baja California, México (Ruiz-Campos et al., 2003). Tiene una distribución confinada en los oasis de las cuencas del Río San Ignaci...
En la laguna de las Ilusiones, Villahermosa, Tabasco, México, las especies de aves interactúan con elementos antrópicos del paisaje. Se realizaron avistamientos de aves acuáticas con el método de conteo por punto fijo durante la temporada de secas y de lluvias del año 2020 en 12 sitios de muestreo en la laguna. Se registraron variables urbanísticas...
Most of the breeding range of the Gray Vireo (Vireo vicinior) lies within the southwestern United States, where the population is sparse, patchy, and
declining. But the species also breeds in Baja California, Mexico, where its status
has not been assessed. To rectify this, in 2021 and 2022 we surveyed four mountain
ranges where the Gray Vireo is...
A specimen of the Least Grebe (Tachybaptus dominicus bangsi) from San Francisco de la Sierra, Baja Calfornia Sur, Mexico, collected 6 April 2022, was 36 km north of the oasis of San Ignacio, where the species breeds and site of the previous northernmost records on the peninsula. The bird’s occurrence on a small isolated pond yet coming into breedin...
Collapsed marine fisheries could provide valuable data on the relationship between fishery exploitation and collapse on effective population size (Ne) and genetic diversity. The Gulf Corvina is a large sciaenid fish endemic to the upper Gulf of California, supporting a large-scale artisanal fishery. Concerns about overexploitation, historical popul...
Microphilypnus and Leptophilypnion are miniaturized genera within the family Eleotridae. The evolutionary relationships among these taxa are still poorly understood, and molecular analyses are restricted to mitochondrial genes, which have not been conclusive. We compiled both mitochondrial and nuclear genes to study the phylogenetic position of Mic...
Habitat loss, flood control infrastructure, and drought have left most of southern California and northern Baja California’s native freshwater fish near extinction, including the endangered unarmored threespine stickleback (Gasterosteus aculeatus williamsoni). This subspecies, an unusual morph lacking the typical lateral bony plates of the G. acule...
The composition and abundance of owls were seasonally determined at four sites of
the Sierra de San Pedro Mártir National Park, Baja California (PNSSPM), Mexico, by means of the call-listening technique from October 2017 to August 2018. A total of 60 records of seven species was obtained (Northern Saw-whet Owl Aegolius acadicus, Long-eared Owl Asi...
We describe 2 recent records with specimens for the endangered endemic mole Scapanus anthonyi in Sierra San Pedro Mártir, Baja California, México. A comparison of cranial measurements with previous specimens is given to illustrate within-species variation and to provide taxonomic corroboration.
We describe 2 recent records with specimens for the endangered endemic mole Scapanus anthonyi in Sierra San Pedro Mártir, Baja California, México. A comparison of cranial measurements with previous specimens is given to illustrate within-species variation and to provide taxonomic corroboration.
Los bivalvos endolíticos son aquellas especies que viven incrustadas dentro de rocas, corales y otros sustratos marinos. En este estudio se analizó la riqueza de especies, abundancia relativa y diversidad (H´'), de los bivalvos endolíticos de la zona intermareal de Punta Maldonado, México. Los muestreos se realizaron en diciembre de 2016 y febrero...
Tlaloc hildebrandi is a small (<130 mm) freshwater fish endemic to Southwest Mexico and is listed as endangered through habitat loss and invasive species. We determine and compare the parameters of the length–weight relationship, relative weight, and condition factor among different populations of the endemic killifish, T. hildebrandi. Fulton’s con...
We assessed the population density and habitat selection of the southernmost rainbow trout subspecies, Oncorhynchus mykiss nelsoni, in three stream sites of the Sierra San Pedro Mártir, Baja California, Mexico. Habitat units (sections of the streams visually delimited on the basis of morphological and hydrological features) were sampled between Feb...
Microphilypnus and Leptophilypnion are miniaturized genera within the family Eleotridae. The evolutionary relationships among these taxa are still poorly understood and molecular analyses are restricted to mitochondrial genes, which have not been conclusive. We compiled both mitochondrial and nuclear genes in order to study the phylogenetic positio...
Length-weight (LW) and standard length-total length (LL) relationships were assessed for 12 fish species caught in the Mulege River estuary (middle Gulf of California), Mexico. Fish were sampled in November 2011 and January 2012, using castnets and gillnets (mesh size 3 mm). Parameters of the LW and LL relationships were estimated using the log-lin...
Belding’s Sparrow (Passerculus sandwichensis beldingi) is one of the 17 currently recognized subspecies of the Savannah Sparrow (Wheelwright and Rising 2008). It can be found in saltmarshes from Point Conception, California, to the estuary of Arroyo El Rosario, Baja California.We describe the nests and habitat of Belding’s Sparrow at Estero Punta B...
Las relaciones Peso - longitud (LW) y longitud patrón- longitud total (LL), fueron evaluadas para 12 especie de peces capturados en el estuario del Río Mulegé (parte media del Golfo de California). Los peces fueron recolectados en noviembre de 2011 y enero de 2012, utilizando atarraya y redes de enmalle (luz de malla 3 mm). Los parámetros de las re...
The spatial and temporal heterogeneity of rivers largely determine both the richness and the variability of the fish assemblages; however, few studies have been carried out in the northern parts of Mexico. This study assesses the species diversity and longitudinal distribution of fish fauna in the Soto La Marina River (northeast Mexico) and how thi...
The Mulege River is one of the 2 estuarine ecosystems in the western coast of the Gulf of California. Due to the lack of ichthyological studies for this estuarine ecosystem, an updated inventory of its fish fauna is documented here, based on records from scientific literature, fish collections, and recent field samplings, complemented with
zoogeog...
The family Haemulidae is a wide-ranging group of marine fishes that are of significant commercial value in the Tropical Eastern Pacific (TEP). Phylogenetic studies on the species Anisotremus interruptus have revealed high levels of genetic diversity as well as divergence among populations in the TEP, which suggests that the taxonomic diversity of A...
The present study measured the daily, seasonal, and annual variability of the water temperature of streams in which the endemic
rainbow trout, Oncorhynchus mykiss nelsoni, is distributed on the western slope of the Sierra San Pedro Mártir, Baja California, Mexico,
between 1996 and 2019. The seasonal thermal interval and daily duration of summer tem...
We investigate whether age profiles of ethnobiological knowledge developmentare consistent with predictions derived from life history theory about the timing ofproductivity and reproduction. Life history models predict complementary knowledgeprofiles developing across the lifespan for women and men as they experiencechanges in embodied capital and...
A Correction to this paper has been published: https://doi.org/10.1007/s12110-021-09399-4
We investigate whether age profiles of ethnobiological knowledge development are consistent with predictions derived from life history theory about the timing of productivity and reproduction. Life history models predict complementary knowledge profiles developing across the lifespan for women and men as they experience changes in embodied capital...
The amphidromous species of Macrobrachium Spence Bate, 1868 occurring on the Mexican
Pacific slope (M. americanum Spence Bate, 1868, M. digueti (Bouvier, 1895), M. hobbsi Nates
& Villalobos in Villalobos Hiriart & Nates Rodríguez, 1990, M. occidentale Holthuis, 1950
(Holthuis, 1950b), and M. tenellum (Smith, 1871)) show a disjunct distribution, wit...
Information regarding trichodinid ectoparasites on marine fishes of North America is relatively scarce. In this study, 5 ciliate species from the family Trichodinidae were found associated with 8 fish hosts from the rocky intertidal zone of the western coast of the Baja California Peninsula (BCP), Mexico. All of the host-parasite relationships reco...
This paper investigates whether age profiles of ethnobiological knowledge development are consistent with predictions derived from life history theory about the timing of productivity and reproduction. We evaluate these predictions using an ethnobiological knowledge assessment tool developed for an off-grid pastoralist population, known as Choyeros...
The marine ecoregion known as the Mexican Pacific Transitional Zone (MPT) is a rich environment consisting of diverse coastal ecosystems with a great diversity of species, including bivalves, which have high ecological importance and perform a wide variety of environmental functions. Our objective was to document new records of bivalve species in t...
Introduction: Morphotypes of native catfish of the genus Ictalurus (Siluriformes: Ictaluridae) are known to occur in allopatry in the northern Sierra Madre Occidental of Mexico, with only the Yaqui catfish (Ictalurus pricei) taxonomically described. Recent genetic analysis of these morphotypes has revealed the monophyly of the I. pricei complex, wh...
Incidental entanglement of a specimen of Masticophis fuliginosus by discarded fishing material is reported in a Ramsar marsh area in the Estero Punta Banda in Baja California, Mexico. This event is associated with the inadequate disposal of fishing gear waste within coastal areas. This unusual record represents the first case of entanglement or pos...
Se reporta la afectación incidental de un espécimen de Masticophis fuliginosus por restos de material de pesca, en una zona de marismas del sitio Ramsar Estero de Punta Banda, Ensenada, Baja California, México. Este evento se asocia a la disposición inadecuada de residuos derivados de la labor pesquera dentro de las áreas costeras. Este registro in...
The environmental exposure to As, Se, Hg, Pb, Cr and toxaphene was assessed for 11 freshwater fish species in irrigation channels, agricultural return flow drains, a drain collecting lagoon and sections of the Colorado River at the Mexicali valley in Baja California, México, during August 2015–April 2016. Arsenic (2.90ngml−1) and Se (1.41ngml−1) in w...
Introduction:
Morphotypes of native catfish of the genus Ictalurus (Siluriformes: Ictaluridae) are known to occur in allopatry in the northern Sierra Madre Occidental of Mexico, with only the Yaqui catfish (Ictalurus pricei) taxonomically described. Recent genetic analysis of these morphotypes has revealed the monophyly of the I. pricei complex, wh...
A morphological characterization is performed within the Gila minacae complex and congeneric species from the
Sierra Madre Occidental, Mexico. A discriminant function analysis based on 33 morphometric and six meristic
characters applied to 209 specimens revealed 15 body characters to be significantly different among the taxa
compared. Southern popu...
Introducción:
El estudio de la edad y crecimiento en peces es un prerrequisto básico para generar información sobre la longevidad, tasas de crecimiento y estructura poblacional, entre otros atributos, todos ellos para la aplicación de políticas enfocadas en el manejo y conservación poblacional. Evaluamos estos atributos en la sardinilla peninsular...
Los peces de pozas de marea presentan adaptaciones morfológicas que favorecen su estancia en este medio físicamente hostil. En comparación con el mar abierto, la zona intermareal está expuesta a mayor turbulencia y limitada en espacio. Poseer un cuerpo grande representaría una desventaja al bajar la marea. Por ello la mayoría de las especies que ha...
Introducción: La colección ornitológica de la Facultad de Ciencias de la Universidad Autónoma de Baja California (COUABC) fue fundada en 1986 con la finalidad de brindar apoyo a las actividades de docencia en la carrera de biología, así como a los proyectos de investigación y formación de recursos humanos, dentro de los programas de licenciatura y...
La trucha Yaqui pertenece a un grupo de truchas nativas no descritas del género Oncorhynchus del Noroeste de México. Estudios morfológicos y moleculares postulan a la trucha Yaqui como una nueva especie exclusiva para las cuencas de los ríos Yaqui, Mayo y Casas Grandes y, evolutivamente muy cercana a la trucha arcoíris, Oncorhynchus mykiss. El cono...
Se incluye una breve sinopsis de las 25 especies de peces exóticos que han sido registradas en la cuenca baja del Río Colorado de México. Para cada especie se incluye nombre científico y nombre común, distribución nativa, distribución exótica local, reconocimiento, propósito de introducción, y grado de invasión. Fotografías fueron realizadas por el...
A new species of nematode, Ascarophis morronei n. sp. (Cystidicolidae), is described from the stomach wall of the woolly sculpin Clinocottus analis (Cottidae) collected in the rocky intertidal from northwestern Baja California, Mexico. Collected nematodes were studied using both light and scanning electron microscopy. Sequence fragments for 18S rDN...
We present the phylogenetic affinities and DNA barcode of Gila cf. eremica, a geographically isolated and morphologically divergent population from G. eremica DeMarais, 1991. Mitochondrial phylogenetic analyses of cyt–b, cox1 and nd2 show a clades pattern within the G. eremica lineage, placing G. cf. eremica in a clade of specific identity to and s...
We studied the fish fauna of the Río Saín Alto (Río Aguanaval endorheic basin) in Zacatecas, Mexico, during the dry (May) and wet (October) seasons of 2011 in order to evaluate changes in the distribution of the species and its relationship with environmental variables. A total of 12 fish species (6 native and 6 exotic) were registered. The longitu...
We present the phylogenetic affinities and DNA barcode of Gila cf. eremica, a geographically isolated and morphologically divergent population from G. eremica DeMarais, 1991. Mitochondrial phylogenetic analyses of cyt–b, cox1 and nd2 show a clades pattern within the G. eremica lineage, placing G. cf. eremica in a clade of specific identity to and s...
We describe the first record and a 30 km southward range extension for Elgaria velazquezi (the Central Baja California Alligator Lizard) to a location in Sierra de la Giganta of Baja California Sur, Mexico. Local ranchers remarked that this
was the first time they had ever noticed this species in the area. We describe two lizards of this species th...
A nivel mundial se ha documentado que la operación de parques eólicos genera impactos negativos en las aves. Estos impactos incluyen la mortalidad de las aves por colisión con los aerogeneradores, el desplazamiento de especies por modificación del hábitat, el efecto barrera y la pérdida de hábitat. Sin embargo, en México es escasa la información pu...
Se presenta el estudio de la ictiofauna de bahía de La Paz (BLP), sustentado en una lista taxonómica actualizada con notas zoogeográficas, de conservación e importancia económica. La lista consta de 533 especies, 314 géneros, 123 familias, 34 órdenes y 2 clases: Actinopterygii (467 especies) y Chondrichthyes (66 especies). El orden Perciformes repr...
The rocky intertidal gastropods of the Marine Priority Region No. 32 (MPR 32) in the State of Guerrero are one of the most studied invertebrates, however, little is known about their diversity and distribution. Here we report 16 new records of gastropods collected at six sites of the rocky coast (MPR 32) located in the State of Guerrero, Mexico. Th...
Para determinar caracteres diagnósticos de utilidad en la identificación taxonómica infraespecífica de la codorniz de California (Callipepla californica) de la península de Baja California, comparamos fenotípicamente cuatro subespecies nominales mediante el análisis estadístico multivariado de 18 caracteres: nueve morfométricos y nueve colorimétric...