Cristian Moisés Galván-Villa

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• Doctor in Science
• Professor at University of Guadalajara

Seven species of fouling sabellid worms are here reported attached to artificial submerged structures (fixed and floating docks, ropes, buoys, rafts, pilings, pneumatic tires and hull of vessels) from 68 localities in marinas and ports from Baja California, Baja California Sur, Colima, Jalisco, Nayarit and Sinaloa (western Mexico). Acromegalomma co...

Echinoderms have been recognized as a rich source of novel bioactive molecules with promising pharmacological applications in the field of biomedical research. In this framework, the objective of the present study was to evaluate the biological activity of the starfish Luidia magnifica protein extract through cytolytic and antimicrobial bioassays....

A small colony of the snowflake coral, Carijoa riisei, was collected from Corralero Lagoon in June 2015. This species is native to the Indo-West Pacific and, as invasive species, spread into Tropical Western Atlantic, Hawaii, Western Africa and Tropical Eastern Pacific. This record suggests that the invasion of C. riisei in the Mexican Pacific coul...

There is no information on the species associated with the mesophotic reefs of Banderas Bay, located in the central Mexican Pacific. This study analysed the reef fish assemblage from three depths (50, 60 and 70 m) in three sampling sites of the southern submarine canyon of the Bay: Los Arcos, Bajo de Emirio and Majahuitas. Several analyses were per...

The starfish Luidia magnifica (Asteroidea: Paxillosida: Luidiidae) is a multiradiate starfish that occurs throughout the Indo- Pacific. Since the description of L. magnifica in 1906 by Fisher, very few observations of this species have been documented. We present new shallow-water records for L. magnifica in the Tropical Eastern Pacific obtained be...

Introduction: The genus Agassizia in Mexico is represented both in the fossil record by the species Agassizia regia† during the Miocene of Chiapas and by the extant species Agassizia excentrica on the Atlantic coast and Agassizia scrobiculata on the Pacific coast. Qualitative diagnosis and descriptions make it hard to distinguish morphological boun...

Introducción: Las colecciones biológicas representan los cimientos para el conocimiento y manejo de la biodiversidad de una región. No obstante, en México, y en particular en el Pacífico central mexicano (PCM), las colecciones regionales enfocadas en equinodermos, son escasas. La colección biológica del Laboratorio de Ecología Molecular, Microbiolo...

Introducción: En el Pacífico central mexicano son escasos los trabajos sobre ecología de asteroideos. Estas especies generalmente se distribuyen de forma aleatoria, aunque en algunas ocasiones pueden encontrarse en grupos o agregaciones. En Los Arcos, al sur de Puerto Vallarta, en Bahía de Banderas, México, se observó Luidia bellonae por primera ve...

Habitat heterogeneity is one of the main factors influencing the dynamics in benthic marine communities. This work assessed the influence of different degrees of coral development − i.e., coral patches and coral communities − on the spatial patterns of echinoderm assemblage in the central Mexican Pacific. The fieldwork was conducted in September 20...

Marine organisms, such as sea urchins, harbor symbiotic bacteria that produce metabolites with antibiotic activity. These metabolites can confer to the host a defense mechanism against pathogens, contributing to its ecological suitability, and can also be used for biotechnological purposes. Considering the above, the objective of this work was to i...

Esta obra constituye una guía de procedimientos a seguir para el muestreo, análisis y estudio de la biota portuaria en México. Como herramienta estandarizada, guía a los usuarios paso a paso, desde la planificación para la toma de muestras en marinas, puertos y áreas naturales protegidas de México, hasta el análisis de la información. Tiene el pode...

Carijoa riisei is an invasive octocoral whose dispersal in the tropics has increased considerably in recent years. This study evaluated the changes in the benthic fauna assemblages associated with C. riisei growing on rocks from a sea port and on the metal of a submerged shipwreck in the bays of Manzanillo, Colima, in the Mexican Central Pacific. Q...

This work presents an inventory of the Polyplacophora species registered in December 2019 in the intertidal environment of 10 sampling sites of the Northern Gulf of California, México. Fifteen species were obtained from a total of 33 species previously reported throughout the Gulf. Acanthochitona avicula, Ischnochiton guatemalensis, Lepidozona serr...

The Mexican Tropical Pacific (MTP) is rich in chitons, mainly represented by the genera Callistochiton Carpenter in Dall, 1879 and Stenoplax Dall, 1879. Despite the widespread presence of these genera in the region, few species have been studied at a molecular level. Using partial cytochrome oxidase I (cox1) gene sequences, we analyzed the genetic...

This work describes the structure of the assemblage of bivalve mollusks (i.e., composition, abundance, density, distribution and species diversity) of four representative rocky beaches of Mazatlan bay, Mexico. Biological samples were taken in the upper intertidal, lower intertidal and shallow subtidal of the beaches together with environmental para...

Chitons from southern México have been poorly documented hitherto and little is known about the species present in this region. Here we report 12 intertidal to shallow subtidal species in six families and nine genera. Chiton articulatus, Chiton albolineatus, and Ischnochiton muscarius were numerically the most common species, accounting for 29%, 27...

Introduction: The Panamic Cushion Star Pentaceraster cumingi is widely distributed along the Tropical Eastern Pacific. This species strictly produces only five arms, but sometimes, this number varies or show another kind of abnormality. Objective: We aimed to evaluate the population size structure and abnormalities occurrence in the radial pattern...

The hermatypic coral ecosystems of the southern coast of Jalisco, Mexico, present an important species richness and coverage for the Mexican Central Pacific. However, knowledge of these ecosystems of the Jalisco coast is fragmented. Studies have concentrated on few localities, employing a limited number of coral health indicators, and gaps still re...

For more than 10 years (2007-2018), the benthic macroinvertebrates of Bahía de Chamela (Mexican Pacific) were sampled at 31 sites (0-25 m depth). A total of 308 species of the five main classes of benthic molluscs were obtained (106 bivalves, 185 gastropods, 13 polyplacophorans, two scaphopods and two cephalopods). This is a significant increase in...

Background: The islands and islets of Bahía de Chamela, in the Eastern Tropical Pacific, were declared as the first marine sanctuary in Mexico and has been protected since 2002. Their marine biodiversity has been documented in a series of papers in the last decade, but only three species of polychaete worms have been reported. New information: S...

Revillagigedo Archipelago and Clipperton atoll are oceanic islands located in the eastern tropical Pacific. The composition and trophic structure of their fish assemblages have never been characterized in detail, and the aim of this study was therefore to analyse the community structure and assess the similarity of fish assemblages between these tw...

A new species of sea cucumbers of the genus Lissothuria Verrill, 1867 is described. Lissothuria imbricata sp. nov. was found in the central-eastern Pacific Ocean, at 2–16 m depth living on top of rocky reefs, partially covered by algae and organic material. It is distinguished from other species of the genus by having body wall ossicles in form of...

Courting males often face the trade-off of attracting the attention of both females and predators. Rapid color change, a relatively simple solution to this dilemma, is described for nuptial males of the Fishgod Blenny Malacoctenus ebisui (Teleostei: Blenniiformes) from direct observations at three rocky reefs in the Mexican Pacific. Nuptial males s...

Antecedentes. La diversidad de erizos irregulares a lo largo de la costa del Pacífico mexicano aún no es bien conocida. Este grupo ha desarrollado una selección del sustrato restringida y está morfológicamente adaptado para enterrarse en el sedimento, lo que dificulta su localización. Objetivos. Elaborar una lista de especies de erizos irregulares...

One colony of the snowflake coral Carijoa riisei (Alcyonacea: Clavulariidae) was found in June 2016, and three more in January 2017, during dives in the port of Manzanillo, Colima, Mexico (Tropical Eastern Pacific). This species was considered as native to the tropical Western Atlantic and invasive in the Pacific, but recent studies suggest that it...

A number of specimens of the Californian lancelet, Branchiostoma californiense Andrews, 1893 were found in Isla Melendres, Sinaloa and Bahía Chamela, Jalisco, in the Mexican Pacific. The specimens were collected with a biological dredge on sandy bottoms. Some morphometric and meristic characters of the collected specimens are described and discusse...

Se presenta información detallada sobre la colección húmeda y seca de moluscos marinos depositada en el Departamento de Ecología de la Universidad de Guadalajara, en Zapopan, México. Los especímenes provienen de recolectas realizadas desde los años 80´s hasta 2013 en la costa del Pacífico mexicano desde Sinaloa hasta Chiapas. Los moluscos están rep...

Los estudios realizados con los poliplacóforos o quitones de la bahía de Mazatlán, los han reconocido principalmente como especies intermareales; aunque las contribuciones taxonómicas las reportan en un rango batimétrico de distribución que va desde el intermareal (0–1m) al submareal (7–50m) y ocasionalmente hasta 90–100m de profundidad (Chaetopleu...

Se analizó el fenómeno de imposex en los gasterópodos marinos de tres sitios de la bahía de Manzanillo, México con diferente grado de exposición a Cd, Pb, Hg, As, Cr, Ni y Co. La recolecta de gasterópodos se realizó en febrero y junio de 2016 y en enero de 2017. Se consideraron cinco especies de los tres sitios de muestreo: Hexaplex princeps (26 in...

Mazatlan Bay is considered the northern boundary of the region with the greatest species richness of infaunal and epifaunal bivalve mollusks in the tropical eastern Pacific. The present study aimed to quantify changes in the patterns of bivalve species diversity in Mazatlan Bay at different spatial scales and to determine which scale contributes mo...

Caprellid amphipods are common epibionts on a variety of invertebrates as well as vertebrates but little is known on their life cycle in respect to their macrofaunal hosts. This manuscript describes the permanent symbiotic association between Caprella suprapiscis amphipods and the scorpionfish Scorpaena mystes. A total of 303 individuals of the cap...

This study presents the species of bivalves and gastropods of commercial interest and potential use recorded in 33 sampling stations in the Gulf of Tehuantepec, southern Mexican Pacific. The collections were performed with a trawling net on board of the shrimp vessel FIPESCO 63. The relative abundance and the biological value index (BVI) of every s...

During a faunistic survey of the islands and islets of Bahía Chamela, Jalisco, Mexico, 40 species of caridean shrimps belonging to 5 families were collected; the Alpheidae with 3 genera and 20 species was the best represented, followed by the Palaemonidae with 10 genera and 12 species. Other families found were: Hippolytidae (3 genera, 5 species),...

An annotated checklist of marine fishes of the Sanctuary of Islands and Islets of Bahía Chamela in the central Mexican Pacific is presented. Records of fish species were obtained by different methods including visual census, sampling with anesthetics, fisherman-nets, and trawling with a biological dredge. Additional records were obtained from natur...

En este trabajo se describe la estructura de los ensamblajes de peces de arrecife de tres Áreas Marinas Protegidas de México (Isla Isabel, Islas Marietas e islas de Bahía Chamela). Se realizaron conteos visuales para registrar las especies de peces, su abundancia y talla estimada. Además, se tomaron video-transectos para estimar la cobertura de alg...

The spatial distribution and abundance of the seven most abundant species of echinoderms (Diadema mexicanum, Centrostephanus coronatus, Eucidaris thouarsii, Isostichopus fuscus, Pharia pyramidatus, Phataria unifascialis and Acanthaster ellisii) were evaluated in coral communities of Isla Isabel National Park (Mexico). Biological (corals and other b...

A new species of caprellid, Caprella suprapiscis sp. nov., is described based on several specimens collected from Bahía Chamela, Jalisco, Mexico. All specimens were found in association with the scorpionfish Scorpaena mystes. Caprellids are set on the dorsal surface of fishes. The species is distinguished by head with a short dorsal projection, eye...

This study describes the structure of the reef fish assemblages of three marine protected areas (Isla Isabel, Islas Marietas, and islands of Bahía Chamela) from México. Visual transects were made for recorder the fish species, abundance, and size. Video-transects were also taken to estímate the cover of some elements of benthonic habitat. A total o...

A new species of commensal shrimp of the genus Typton from holothurians is described and illustrated. The specimens were collected from a single specimen of Holothuria (Halodeima) inornata Semper, 1868 at a depth of 7 m. This is the first record of an association between a shrimp of the genus Typton and echinoderms. With this record, five species o...

The first stage of Pontonia simplex Holthuis, 1951 collected on the coast of Jalisco, Mexico, is described and compared with that of P. pinnophylax (Otto, 1821) and Ascidonia flavomaculata (Heller, 1864).

We describe the composition and distribution of bivalve molluscs from the sandy and rocky intertidal and the shallow subtidal environments of Bahía de Mazatlán, México. The bivalve fauna of the bay is represented by 89 living species in 28 families, including 37 new records and four range extensions: Lithophaga hastasia, Adula soleniformis, Mactrel...

Inventario de biodiversidad de la costa sur de Jalisco y Colima Volumen 2

Se identificaron 12 especies de cangrejos ermitaños del material recolectado en la bahía Chamela, Jalisco. La familia Diogenidae fue la mejor representada con 7 especies. Nueve especies representan registros nuevos para la bahía y 2 pertenecientes al género Paguristes se descubrió que no han sido descritas. Se encontró asociación de los cangrejos e...

Eight species of the genus Neogonodactylus have been reported from the eastern Pacific. Up to now, only three of these species have been collected in Mexican waters: Neogonodactylus stanschi (Schmitt, 1940), N. lalibertadensis (Schmitt, 1940), and N. zacae (Manning, 1972). Recent sampling of stomatopods in several localities of the Pacific coast of...

The popularity of ecotourism in the marine protected areas of Mexico has increased over the last 10 years; in particular there is a large development of a SCUBA diving industry in the Mexican Pacific including Isabel Island. Given the risks associated with human activity in the marine environments around this island, we propose two ecotourism manag...

Forty species of echinoderms were collected in the intertidal and shallow subtidal zones of 14 sites of bahía Chamela. Of particular importance are 7 new records of species for the coast of Jalisco. A nonmetric multidimensional scaling analysis and the Jaccard's similarity index identified different groups and isolated entities according to the con...

En este estudio se describe la estructura y variación temporal del ensamble de peces asociados al arrecife coralino de Playa Mora, Jalisco, México. El registro de especies se realizó mediante censos visuales en banda de 50 x 5 m, en tres diferentes épocas del año (templado-seca, cálido-húmeda y cálido-seca). Se registró un total de 5,689 peces de 6...

Additive partitioning was applied to variation in reef fish spatial diversity at Isla Isabel National Park, Nayarit state, Mexico, and to identify the environmental and spatial variables that best explains it. Analyses included expected and observed species curves, rare species analysis, additive partitioning of alpha- and beta-diversity, and canon...

peces crípticos el término críptico proviene del griego kryptikos, que significa oculto, aunque se puede definir mejor como algo que se encuentra a simple vista pero es difícil de distinguir. Los peces crípticos, también llamados criptobénticos, son muy abundantes en los fondos marinos de arrecifes rocosos y coralinos, pero son poco conocidos y pas...

This study describes the reef fish assemblages of Isabel Island and their relation with the benthos heterogeneity. A total of 39 visual transects from 19 different localities were performed in the zones North, South, East, and West around the island during December 2002, October 2004, and April 2005. The species composition and their abundance were...

A survey for bivalves was conducted at 25 sampling stations on the Mexican Central Pacific shelf off Jalisco and Colima, during the summer of 1988. The bivalves were sampled with a Van Veen grab at 16 stations with medium sand, sandy silt, and silty clay substrata at depths between 18 and 112 m. A total of 5,196 individuals belonging to 59 genera a...

Resumen Se describe la composición específica y la estructura de la comunidad de macroinvertebrados bénticos del subli-toral somero de Punta La Rosada, localizada en la parte central de Bahía Chamela, Jalisco. Los muestreos se rea-lizaron durante enero de 2007 en 4 sitios someros (7-10 m de profundidad) ubicados a una distancia aproxima-damente de...

The taxonomic composition of 160 species of bivalves and gastropods recorded in the Gulf of Tehuantepec is presented with information on their habitat and distribution along 10 different localities of the shoreline and 42 stations of the continental shelf. The species were on sandy and rocky beaches, coastal lagoons, estuaries, mangroves, rocky bre...

SE DESCRIBE LA COMPOSICIÓN ESPECÍFICA DE EQUINODERMOS DEL PARQUE NACIONAL ISLA ISABEL, UBICADO EN EL PACÍFICO CENTRAL MEXICANO. LOS MUESTREOS Y RECOLECTAS SE REALIZARON DURANTE OCTUBRE DE 2004, MARZO Y JULIO DE 2005 MEDIANTE BÚSQUEDA DIRECTA EN DIFERENTES PLAYAS ROCOSAS Y MEDIANTE TRANSECTOS EN BANDA EN LOS SUSTRATOS ROCOSO Y ARENOSO DEL SUBMAREAL...

Resumen Peces crípticos asociados a corales ramosos del género Pocillopora en el arrecife de Playa Mora, bahía Tenacatita, México. Recientemente el papel de los peces crípticos en los ecosistemas de arrecife de coral se ha convertido en el punto de atención de estudios sobre ecología de peces de arrecife. Para el presente estudio se determinaron lo...