Omar Hernando Avila-Poveda (Avila-Poveda OH)- Marine biologist, PhD
- Research Professor at Autonomous University of Sinaloa
Omar Hernando Avila-Poveda (Avila-Poveda OH)
- Marine biologist, PhD
- Research Professor at Autonomous University of Sinaloa
https://www.scopus.com/authid/detail.uri?authorId=15071523200
About
78
Publications
55,579
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
769
Citations
Introduction
My research focuses on REPRODUCTIVE BIOLOGY AND ECOLOGY OF MARINE INVERTEBRATES with ecological and economic value, through a complementary approach between developmental biology and fisheries biology; addressing questions of the reproductive cycle, maximum gonad investment, expenditure in gonads and growth, and their relationship with environmental parameters throughout the life history stages.
https://publons.com/researcher/B-7533-2012/,
https://orcid.org/0000-0002-4411-0602
Current institution
Additional affiliations
September 2014 - present
September 2014 - present
Position
- Universidad del Mar (UMAR)
Education
July 2011 - July 2014
August 2002 - September 2004
Field of study
- Marine Biology
January 1995 - December 2001
Publications
Publications (78)
The cephalopod digestive gland (DG) is responsible for enzyme production as well as nutrient and lipid storage. Octopus maya (Mollusca: Cephalopoda) is a holobenthic octopus species with aquaculture potential. To develop a balanced food for the rearing of this octopus, it is necessary to understand its digestive physiology. We performed histologica...
The reproductive biology of Ophiocoma aethiops and O. alexandri was analyzed based on monthly time-series samples from May 2009 to April 2010 at Estacahuite Bay, Oaxaca, in the Mexican tropical Pacific Ocean. We evaluated the relationship between the reproductive biology of both species and variations of sea-bottom temperature, salinity, pluvial pr...
The polyplacophoran Chiton articulatus Sowerby, 1832, is distributed along the tropical Pacific coast of Mexico and has been collected for generations in an artisanal manner for bait or as a complement in domestic cookery of coastal inhabitants; nevertheless, recently, some restaurants are offering this chiton to the tourists as a gourmet and aphro...
An organism's maximum gonad investment (MGI) typically indicates its reproductive season and is often measured by the peak of the gonadosomatic index. Since external sexual dimorphism is often not evident, intrinsic sex differences remain unstudied. We analysed the reproductive seasonality of each sex of the broadcast-spawning sea cucumber Holothur...
Context. Chiton articulatus is a gonochoric, free-spawning mollusc with short-lived trochophore larvae inhabiting rocky shores along the fragmented and heterogeneous Mexican Tropical Pacific (MTP). Its limited dispersal in this patchy environment may lead to genetic divergence among populations. Aims. Our objective was to characterise the genetic d...
Estimados amigos y lectores,
Estamos muy contentos de compartir con ustedes un logro significativo que hemos denominado la “Era del quitón”.
Sin planearlo, tres de nuestras publicaciones llamaron la atención de los editores de tres revistas científicas, con lo cual ahora tenemos una trilogía fotográfica con Chiton articulatus como protagonista en...
Seasonal dimorphism in the body shape of marine invertebrates has been poorly explored compared to vertebrates. We aim to investigate through traditional (body length/width ratio, dorsal elevation ratio and angle of elevation) and geometric (centroid size and shape geometric configurations) morphometrics the effect of gonad maturity (via the gonado...
Appraising sexual asymmetry during maximum gonad investment (MGI) offers a sharp tool to evaluate the reproductive response of species to climate by coupling extrinsic and intrinsic factors. We comparatively analyze how the mass and physiological male and female gonad investments of the broadcast-spawning intertidal Chiton articulatus in two popula...
Chiton articulatus is a species of mollusk living in the tropical Pacific intertidal rocky shores of Mexico. This species feeds on solid waste organic sources, including hard crustose algae that grow on rocky substrates, by grazing on them with its radula, a flexible chitinous membrane lined with mineralized major lateral teeth. In this study, the...
Gonad development stages (GDS) are a critical tool that can be easily applied in fisheries to visually discriminate mature from immature organisms and assess their reproductive condition. This study proposes a morphochromatic scale to define gonad development stages for razor surgeonfish (Prionurus laticlavius) based on morphological and structural...
The class Polyplacophora (chitons) represents a dorsoventrally flattened mollusk group that has an oval-shaped body covered with eight overlapping sclerites providing bilateral symmetry. Chitons show abnormalities (teratologies) that are characterized by symmetry deviations between the right and left sides of their bodies. As these deviations do no...
Hydrogels are widely used materials in biomedical, pharmaceutical, cosmetic, and agricultural fields. However, these hydrogels are usually formed synthetically via a long and complicated process involving crosslinking natural polymers. Herein, we describe a natural hydrogel isolated using a ‘gentle’ acid treatment from the girdle of a chiton specie...
Background
Elevated temperatures reduce fertilization and egg-laying rates in the octopus species. However, the molecular mechanisms that control the onset of fertilization and egg-laying in the octopus’ oviducal gland are still unclear; and the effect of temperature on the expression of key reproductive genes is unknown. This study aims to better...
The Bergmann’s Rule (described first for endothermic organisms, later for ectothermic taxa) established that intraspecifically the organisms of populations which live at colder climate (high latitudes) tend to have larger body sizes than those which live at warmer climate (low latitudes); and the Temperature-Size Rule (which described the relations...
Growth is an important life history trait that can be related to environmental features or can be implemented to characterize populations. This study examined growth by Schnute growth models based on length data for an edible intertidal invertebrate with indeterminate growth: Chiton articulatus. The geographical distribution of this species extends...
The brain optic glands (OPT) and the reproductive oviducal glands (OVI) are key modulators of the reproductive physiological stages of octopus’ life such as maturation, fertilization, senescence, and death. Octopus maya is an ectothermic organism, then its reproductive success depends on the temperature; thermal stress causes a reduction in fertili...
A conceptual model of reproductive development in invertebrates with broadcast spawning was developed to improve the evaluation and understanding of the variability of three reproductive traits that are commonly used in fisheries biology (Fig. 1): Trait 1, the reproductive cycle, Trait 2, the reproductive or ‘breeding’ season, Trait 3, the size at...
La pesca en las Islas Galápagos representa una fuente importante de ingresos para la comunidad galapagueña. La actividad pesquera en las islas es estrictamente artesanal e incluye la pesca de quitones (Radsia goodallii y Radsia sulcatus), como una actividad complementaria a sus actividades cotidianas. El recurso quitón ha sido consumido a manera de...
El reemplazo total de dientes radulares de Chiton articulatus fue evaluado para dos localidades límite de su distribución geográfica. Se contó la cantidad de hileras de dientes totales (CHDT), la cantidad de hileras de dientes biomineralizados (CHDB). Se calculó la tasa mensual de biomineralización radular (TBR) y se estimó el tiempo de reemplazo t...
The marine mollusc, commonly called sea cockroach or chiton Chiton articulatus, is a mollusc belonging to the group known as Polyplacophora because its shell is composed of eight individual plates. This mollusc inhabits the rocky intertidal shore of the Mexican Tropical Pacific, where it is endemic. It has ecological, but also economic, importance....
En las Galápagos existen 19 especies de quitones, siete de las cuales son endémicas y una de ellas lo "suficientemente" abundante para soportar una pesquería con potencial económico: la canchalagua lisa, Radsia goodallii. Esta especie está incluida en el calendario pesquero de la Reserva Marina Galápagos, sin embargo, no presenta regulación específ...
Chiton articulatus exhibited growth parameters (population size, number of size groups, number of cohorts, growth rate and longevity) divergent between annual cold “La Niña” (ACE) and annual warm “El Niño” (AWE) events. We used a multi-model inference approach (Schnute models), considering the size-structure and individual growth in the absence of...
El molusco poliplacóforo Chiton articulatus comúnmente conocido como “cucaracha de mar” o “lengua de perro” es una especie endémica del Pacífico tropical mexicano con potencial económico. En Acapulco, Guerrero, esta especie presenta la mayor oferta y demanda, por lo cual es objeto de la pesca artesanal. Con el pie musculoso de la cucaracha de mar s...
La clase Polyplacophora conocida comúnmente como quitones, es un grupo de moluscos que, de manera general, han sido categorizados como herbívoros debido a la abundante disponibilidad de algas presentes en el medio que habitan. Sin embargo, estudios recientes con quitones analizan la anatomía del intestino, contenido estomacal, morfología radular y...
El rendimiento de carne (RC) es un índice ampliamente utilizado en la industria de la ganadería; para calcular la cantidad de carne que produce un organismo para su procesamiento y consumo. Este método ha sido adoptado por otras áreas, como la pesquería y la acuicultura. Chiton articulatus es un molusco poliplacóforo endémico del Pacífico tropical...
En poliplacóforos como Chiton articulatus la gónada es tubular, única y en posición dorsal-superior a la longitud. Durante la actividad reproductiva (madurez gonádica), la gónada aumenta el volumen y ejerce presión interna en tres dimensiones: largo, ancho y alto, lo cual comprime los órganos ventrales hacia el pie y empuja el conjunto colectivo de...
Unusual or accidental cases of ovotestis in regular gonochoric species has been observed in several sea urchin species that led to indicate that they are hermaphrodites (Boolootian and Moore, 1956; Gonor, 1973; Ijiri et al., 1981; Carrasco, 2007), however, broadly some of these events are isolated and most likely there are not hermaphrodites as mod...
Now published in: - - - - - - - - - - Ecological Indicators - - - - - - - - - - - - - - - - - -- -- - - - doi: https://doi.org/10.1016/j.ecolind.2018.09.036 - - - - - - - - - - Volume 96, Part 1, January 2019, Pages 437-447. - - - - - - - - - - TITLE: Reproductive performance of Octopus maya males conditioned by thermal stress - - - - - - - - - - I...
Observations of wild male O. maya suggest that temperatures below 27 °C favour their reproductive performance. From these observations we hypothesize that, as in females, the temperature modulates the reproductive performance of adult O. maya males. The study aimed to evaluate the physiological condition, reproductive success, and histological dama...
Octopus maya endemic to the Yucatan peninsula, Mexico, is an ectotherm organism particularly temperature-sensitive. In females O. maya studies reveal that temperature affects the spawning, number of eggs, fecundity and the viability of embryos. The aim of this work was directed to evaluate the physiological condition, the reproductive success, and...
Reproductive studies of an intertidal free-spawning population of Chiton articulatus (Mollusca: Polyplacophora) from Puerto Angel, Oaxaca, Mexico were undertaken during 2011. We used gonad histology and gonadal indices to assess the relative gonad expenditure of the sexes (RGES) and other reproductive traits, accounting for individual and seasonal...
Queen conch (Lobatus gigas), is an economically and culturally important marine gastropod. The species is subject to extensive exploitation throughout large parts of the Caribbean which has led to a decrease in population densities across much of the species’ distribution range. Hence, there is a need for protective measures to safeguard the reprod...
2016 MSA Molluscan Research Achievement Award.
The MSA Newsletter, Vol 164: 5-6 (2018).
The Molluscan Research achievement award is given annually to the best paper published in our journal by early-career or amateur malacologists. Congratulations to Omar Hernando Avila-Poveda who won the 2016 award for his contribution to the paper 'Reproductive...
La evaluación de la estructura genética de una población sujeta a explotación puede generar información pertinente para la incorporación de estrategias de manejo y conservación. Se ha observado, que especies de invertebrados costeros que presentan poblaciones estructuradas derivadas de un bajo potencial de dispersión, tienden a ser susceptibles a l...
Las algas constituyen un componente fundamental del ecosistema intermareal rocoso debido a su papel como productores primarios y fuente de alimento para invertebrados herbívoros. La recolecta incidental de macroalgas epibiontes puede vulnerar la biodiversidad y el ecosistema. Bajo el supuesto que la estructura de la comunidad de macroalgas epibiont...
The rocky intertidal communities are subjected to physical and biological processes that erode them, so species require robust armor for their protection. The chitons have an articulated natural armor that provides them protection and robustness; however erosion on its plates has been observed, which can affect their fitness condition and mobility....
The oviducal glands (ODG) play a crucial role in octopus reproduction. Herein, structural changes of each section of the ODG of Octopus mimus are described histologically throughout the gonad development stages (GDS). To do this, the epithelial height, stereociliated or non-stereociliated epithelium, nucleus type (pycnotic or non-pycnotic), epithel...
Laboratory studies have demonstrated that high temperatures inhibit spawning of Octopus maya; therefore, in oceanic warming scenarios the population dynamics may be affected. The aim of the present study was to go beyond laboratory studies under controlled temperatures to examine the possible relationship between large-scale thermal patterns and re...
Gonad development stages (GDS) and, subsequently, the reproductive cycle are described by performing histology of some gonad portions. In polyplacophorans, gametogenesis is not enough to define GDS; further anatomical gonad features are relevant. In most adult polyplacophorans, the gonad is a simple anatomical structure that resembles and operates...
In the intertidal zone availability of substrate is limited and epibiosis frequently occurs. The epibiotic community of a basibiont (substrate organism) at the intertidal rockyshore depends on the basibiont species, season and region. In mollusks, the main basibionts reported belong to the classes Gastropoda, Bivalvia and in lesser degree to Polypl...
Octopus maya is the main species caught in Mexico. From September 2007 to June 2008, its sex ratio, reproductive season, frequency of non-vitellogenic and vitellogenic oocytes, reproductive indices, and size and weight at maturity, were evaluated. The monthly sex ratio was significantly different from 1:1. The major reproductive season occurs durin...
Diadema mexicanum is a common inhabitant of the Mexican Pacific coast and a key species for coral reefs dynamics. Several reproductive traits of D. mexicanum throughout one year at La Entrega Bay, Oaxaca (15°44′N), in the Mexican tropical Pacific, were analyzed. Maturity index or microscopic maturity index “MI” was calculated. Annual ratio of males...
Variations in progesterone (P4) and testosterone (T) levels in the gonad of Octopus maya from Sisal in Yucatan State, Mexico, were investigated by radioimmunoassays and in relation to four gonad maturation stages (GMS) and to the reproductive cycle, as represented by two maturity indices (microscopic ‘MiMI’ and macroscopic ‘MaMI’). According to the...
The age/size at maturity (TM) is the basis to establishing a minimum catch size (TMC) as a measure of fishery management of a resource. The polyplacophoran Chiton (Chiton) articulatus, is a highly exploited resource that requires fishery regulations along the Pacific coast of Mexico. The aim of this study is to provide the reproductive biological b...
The main objective of this research was to provide reproductive knowledge of Octopus maya Voss y Solís-Ramírez, 1966, through its life history, as support for the recent Octopus Fisheries Management Plan and its respective action line No. 1.4. (DOF, 28 March 2014), which refers to protect the females in reproduction and its reproductive season.
Th...
Citation analysis has become an essential tool for research and academic effectiveness evaluation of universities. However, authorship identity has long been difficult to resolve in bibliometric analyses for many scientific fields, where performance of algorithms against human judgment is far from universal. Now with the boom of authors with compou...
Hoffmannola hansi (Mexican intertidal leather slug) is traditionally reported as an endemic species to the Gulf of California, Mexico. However, its presence in the southern Mexican Pacific has been mentioned in regional checklists and reports. Here we provide new records of H. hansi populations from at least 3 locations from Oaxaca, Mexico. The ana...
Commercially available radioimmunoassays (RIA) with 125I-labeled hormones were adapted, developed and validated to quantify progesterone and testosterone in gonad extracts of Octopus maya, considered an easily domesticated species with potential in aquaculture. Development of the RIAs was divided into four phases: (1) extraction of progesterone and...
This study describes and recognises, using histological and microscopical examinations on a morphometrical basis, several gonad traits through the early life stages of Chiton articulatus and C. albolineatus. Gonadal ontogenesis, gonad development stages, sexual differentiation, onset of the first sexual maturity, and growth sequences or "early life...
The sea cucumber Holothuria fuscocinerea is among the most common holothurian species widely distributed in the Tropical Eastern Pacific Region and is becoming a potentially important fishery in Mexico. Nevertheless, there are no studies about its reproductive biology. This study analyzed several reproductive traits of H. fuscocinerea based on mont...
We examined changes in the histology, physiology and enzymatic activity of the digestive gland—as well as changes in morphology and feeding behavior—of Octopus maya during rearing, to define the phases characterizing post-hatching development. Morphometric changes showed that juvenile O. maya exhibited a non-growth phase during the first 10 d post-...
The reproductive cycle of the Queen Conch, S. gigas, in the Archipelago of San Andres, Providencia and Santa Catalina, Colombia, was estimated during a 1-year period (February 2003– January 2004) from monthly observations on histological sections of gonads collected from sexually mature individuals. The resting, gametogenic, mature, and post-spawni...
Gonad development during the early life of Octopus maya is described in terms of histological, morphometric, oocytes growth, and somatic-oocyte relationship data obtained from octopus cultured at the UMDI-UNAM, in Sisal, Yucatan, Mexico. This study is the first publication on gonad development during the early life of Octopus maya. A total of 83 O....
The main objective of the current study was to determine an optimal dosage of commercial carp pituitary extract (CPE) of the conventional heteroplastic hypophysation technique to induce spawning in the wild caught striped mojarra broodstock Eugerres plumieri under laboratory conditions. We also describe trials testing saline acclimation regimes (ch...
Size at sexual maturity was investigated in 346 queen conch, Strombus gigas, collected from the Archipelago of San Andres, Providencia and Santa Catalina (SAI), Colombia. Size at sexual maturity is defined as the size (based on total shell length and lip thickness) at which 50 % of the population of queen conch sampled had mature and emission gonad...
The histology of the alimentary system of Strombus gigas was examined, focusing on the epithelial and subepithelial connective tissue of the mouth, style sac, digestive gland, and anus. Four structures were chosen because of their functions: (1) ingestion of food (mouth); (2) digestion, absorption, and storage of nutrients (style sac and digestive...
A histological study of Strombus gigas was analyzed with samples of the proboscis, eye antenna, foot, penis, anus, ctenidium, style sac and kidney. We observed five types of epithelial tissue: Simple columnar epithelium (foot, anus, ctenidium, kidney); pseudo-stratified epithelium (proboscis, eye antenna); glandular epithelium (foot, kidney), simpl...
The lack of direct studies on the reproductive cycle of Queen conch Strombus gigas, has made difficult to raise agreed measures of regulation to their cycle; that they allow the rational and sustainable use of this communitarian resource for all Caribbean. This thesis investigates by means of the histological analysis of gonad the reproductive cycl...
El tegumento, compuesto por piel y sus apéndices, forma en conjunto un órgano que recubre el cuerpo, ofreciendo a los tejidos blandos subyacentes (dermis, hipodermis) una cubierta de protección contra lesiones. Además, participa en procesos de locomoción, de interacción física y química con el ambiente y de respiración. A fin de conocer la estructu...
The populations of Queen conch are overfishing, requiring the histological studies of its tissue, as the mprphological base to understand the functioning of this organism. The mantle is the responsible tissue to formation of the shell, to chemically and physically interacts with the environment, and it secretes mucus. This work describes the histol...
Six organisms of Strombus gigas were collected at 22°22” North and 89°41” West in Alacranes reef, located 135 Kilometers in front to the coasts of the municipality of Progress, in the State of Yucatan, of the Mexican United States, in June of 2001. To know and identify the structural characteristics at cellular and tissue scale to develop a histolo...
Questions
Questions (2)
For an analogy to this topic, I recalled a 1985 American science fiction film: "Back to the Future".
More and more research publications are increasing and although some journals receive enough manuscripts, others seem to stop receiving manuscripts to review and publish. Currently, some publications were indexed with the YEAR backward or too much forward, with respect to the date (year) of the complete process of a publication and its acceptance. Analogous to the movie “Back to the Future”, will it be fiction or will it have real consequences both for the institutional evaluations of each researcher and for impact factors such as JCR (WoS) and CITEScore (Scopus)?
An example of indexing with the year BACKWARD from the acceptance is:
Journal of the Marine Biological Association of the United Kingdom
- Accepted in 2022 but formally published and indexed in 2021:
Volume 101 - Issue 8 - December 2021
- Accepted in 2022 but formally published and indexed in 2021:
Volume 101 - Issue 7 - November 2021
- Accepted in 2021 but formally published and indexed in 2020:
Volume 100 - Issue 8 - December 2020
An example of indexing with year very too much FORWARD from the acceptance is:
Brazilian Journal of Biology
Accepted in 2021 but formally will be published and indexed in 2024:
volume 84
what do you think?
