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390 resultados encontrados para: AUTOR: Suárez Morales, Eduardo
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1.
Artículo
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Resumen en inglés

The oceanographic conditions of the Pacific Ocean are largely modified by El Niño (EN), affecting several ecological processes. Parasites and other marine organisms respond to environmental variation, but the influence of the EN cycle on the seasonal variation of parasitic copepods has not been yet evaluated. We analysed the relation between infection parameters (prevalence and mean intensity) of the widespread parasitic copepods Caligus bonito and Charopinopsis quaternia in the dolphinfish Coryphaena hippurus and oceanography during the strong 2015–16 EN. Fish were collected from capture fisheries on the Ecuadorian coast (Tropical Eastern Pacific) over a 2-year period. Variations of sea surface temperature (SST), salinity, chlorophyll a (Chl-a), Oceanic Niño Index (ONI), total host length (TL) and monthly infection parameters of both copepod species were analysed using time series and cross-correlations.

We used the generalised additive models for determine the relationship between environmental variables and infection parameters. The total body length of the ovigerous females and the length of the eggs of C. bonito were measured in both periods. Infection parameters of both C. bonito and Ch. quaternia showed seasonal and annual patterns associated with the variation of environmental variables examined (SST, salinity, Chl-a and ONI 1+2). Infection parameters of both copepod species were significantly correlated with ONI 1+2, SST, TL and Chl-a throughout the GAMLSS model, and the explained deviance contribution ranged from 16%-36%. Our results suggest than an anomaly higher than +0.5°C triggers a risen in infection parameters of both parasitic copepods. This risen could be related to increases in egg length, female numbers and the total length of the ovigerous females in EN period. This study provides the first evidence showing that tropical parasitic copepods are sensitive to the influence of EN event, especially from SST variations. The observed behaviour of parasitic copepods likely affects the host populations and structure of the marine ecosystem at different scales.


2.
Artículo
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3.
Artículo
Una nueva especie de halicyclops (Copepoda, cyclopoida, halicyclopinae) de un sistema estuarino de la costa caribe de Colombia
Fuentes Reinés, Juan Manuel (autor) ; Suárez Morales, Eduardo (autor) ;
Contenido en: Acta Biologica Colombiana Vol. 25, no. 1 (January-April 2020), p. 14-21 ISSN: 1900-1649
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Resumen en: Español | Inglés |
Resumen en español

Muestras de plancton obtenidas de la Ciénaga Grande de Santa Marta, un extenso sistema estuarino en el norte de Colombia, produjeron especímenes machos y hembras de una especie no descrita del género Halicyclops. Los copépodos de la familia Cyclopidae son dominantes en los hábitats de agua dulce y transicionales. Los miembros de la subfamilia Halicyclopinae son predominantemente de hábitats salobres, con algunas especies de agua dulce. La nueva especie aquí descrita es asignable al grupo de especies denominado “F” de Halicyclops (sensu Pesce, 2018) con una fórmula de espinas exopodales (P1–4) = 2333. Actualmente, este grupo contiene cinco especies y una subespecie. Halicyclops gutierrezi sp. n. puede distinguirse de sus congéneres conocidos por la ausencia de un verdadero opérculo anal, la longitud relativa de las setas de la P5 de la hembra y del macho, la longitud relativa de las setas internas de P4EXP3 y por detalles de la anténula del macho. Esta es la quinta especie de Halicyclops registrada en Colombia y la primera del grupo “F” de Halicyclops descrita en la cuenca del Caribe. Con la adición de H. gutierrezi sp. n., aumentó a 20 el número de especies del género que se conocen en la región Neotropical. Se proporciona una clave para la identificación de las especies del género registradas en Colombia.

Resumen en inglés

Plankton samples obtained from the Ciénaga Grande de Santa Marta, an extensive estuarine system in northern Colombia, yielded adult male and female specimens of an undescribed halicyclopine cyclopid copepod of the genus Halicyclops. Cyclopid copepods are frequently found in freshwater and transitional habitats. Members of the subfamily Halicyclopinae are chiefly brackish water forms with a few freshwater species. The new species described herein is assignable to the group of species “F” of Halicyclops (sensu Pesce, 2018) with a 2333 exopodal spine formula. Currently, this group contains five species and one subspecies. Halicyclops gutierrezi sp. n. can be distinguished from its known congeners by the absence of an anal operculum, the relative length of setae of the female and male P5, the relative length of the inner setae of P4EXP3, and details of the male antennule. This is the fifth species of Halicyclops recorded from Colombia and the first one of Halicyclops group “F” described from the Caribbean region. With the addition of H. gutierrezi sp. n., the number of species of the genus known from the Neotropics increased to 20. A key to the species of the genus recorded in Colombia is also provided.


4.
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Seasonal variability of stable isotope values and niche size in tropical calanoid copepods and zooplankton size fractions
Kozak, Eva Rose (autora) ; Franco Gordo, María del Carmen (autora) ; Godínez Domínguez, Enrique (autor) ; Suárez Morales, Eduardo (autor) ; Ambriz Arreola, Israel (autor) ;
Contenido en: Marine Biology Vol. 167, no. 3, article number 37 (March 2020), p. 1-13 ISSN: 1432-1793
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Resumen en inglés

The seasonal variability of stable isotope values (δ15N and δ¹³C), ∆15N values, and niche width of calanoid copepod species, three zooplankton size fractions and seston were assessed from samples obtained monthly between January and December 2012 at a coastal sampling site in the Eastern Tropical Pacific off Mexico (19°09′03′′ N, 104°44′50′′ W). Twenty calanoid copepod species were analyzed, 15 of which were sampled in both the cool, productive ‘mixed’ period and the warm, oligotrophic ‘stratified’ period. While copepod δ15N and ∆15N values were higher during the mixed period, seston δ15N values did not differ between periods. The δ¹³C values indicated a seasonal difference between a priori-defined groups of oceanic and coastal copepod species. The seasonal variations of both the isotopic niche (Bayesian ellipses) values and Layman metrics in tropical copepods and zooplankton fractions suggested an opportunistic feeding strategy responding to the local coupled physical–biological seasonal processes. During the productive mixed period, the trophic web was more robust and stable, and a wider niche was observed. Contrary to commonly reported responses to environmental conditions, we found a more complex mesozooplankton food web during the productive period and a shorter web during the oligotrophic period, highlighting the importance of researching trophic dynamics in coastal tropical ecosystems.


5.
- Libro con arbitraje
Freshwater copepods (Calanoida, Cyclopoida and Harpacticoida) from the Chihuahuan Desert / Martha Angélica Gutiérrez-Aguirre, Eduardo Suárez-Morales, Adrián Cervantes-Martínez, Elizabeth J. Walsh
Gutiérrez Aguirre, Martha Angélica (autora) ; Suárez Morales, Eduardo (autor) ; Cervantes Martínez, Adrián (autor) ; Walsh, Elizabeth J. (autora) ;
Estado de México, México : Clave Editorial , c2019
Clasificación: EE/595.34097216 / F7
Bibliotecas: Campeche , San Cristóbal , Tapachula
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SIBE Campeche
ECO040007056 (Disponible)
Disponibles para prestamo: 1
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SIBE San Cristóbal
ECO010019842 (Disponible)
Disponibles para prestamo: 1
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SIBE Tapachula
ECO020010989 (Disponible)
Disponibles para prestamo: 1
Índice | Resumen en: Inglés |
Resumen en inglés

This document is the result of collaborative work among colleagues from different institutions in Mexico (Universidad de Quintana Roo, Cozumel and El Colegio de la Frontera Sur, Chetumal) and the United States (University of Texcas, El Paso). This work presents the taxonomy, morphology and distribution of the free-living, freshwater copepods that inhabit ephemeral aquatic habitats in one binational reserve known as the Chihuahuan Desert. This desertic zone is part of the large North American biogeographic region called Altiplano Mexicano, which is shared by Mexico and the United States. A joing effort was made to synthesize findings about the diversity of the copepods than inhabit this peculiar geographic area, where aquatic systems are scarce and ephemeral. It includes a taxonomic and morphological assessment of 33 copepod species and contains over forty individual drawings, and 37 plates of photographs of Scanning Electron Microscopy (SEM).

Índice

Akcnowledgments
Preface
Chapter 1. Introduction and Anatomical terminology in Copepoda
References
Chapter 2. Species of Copepoda (Calanoida, Cyclopoida, Harpacticoida) from the Chihuahuan Desert
References
Chapter 3. Geographic distribution of the freshwater copepods from the Chihuahuan Desert
References


6.
Artículo
New records of Harpacticoida (Crustacea, Copepoda) from a coastal system of northern Colombia
Fuentes Reinés, Juan Manuel (autor) ; Suárez Morales, Eduardo (autor) ;
Disponible en línea
Contenido en: Pan-American Journal of Aquatic Sciences Volume 14, número 2 (2019), p. 100-114 ISSN: 1809-9009
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Resumen en español

Nuevos registros de Harpacticoida (Crustacea, Copepoda) de un sistema costerodel Norte de Colombia. Se documenta la presencia de diez especies de harpacticoides en la Ciénaga Grande de Santa Marta, Magdalena, Colombia. Las muestras de zooplancton fueron colectadas en la zona litoral con vegetación y de la zona costera. Todas las especies fueron registras en el área relacionada con la vegetación. Tres de ellas, Nitokra lacustris lacustris (Shmankevich, 1875), Parategastes caprinus Wellershaus, 1970 y Tisbella pulchella (Wilson, 1932) son nuevas para la fauna de harpacticoides de Colombia. El análisis taxonómico incluye comentarios morfológicos comparativos y fotografías digitales de estas especies. Este es el tercer reporte sobre la diversidad de la fauna de copépodos harpacticoides en este sistema hidrológico.

Resumen en inglés

Ten species of harpacticoids are reported from Ciénaga Grande de Santa Marta, Magdalena, Colombia. Zooplankton samples were collected from the littoral zone with vegetation and from offshore zones. All the species were recorded in the vegetation-related area. Three of them, Nitokra lacustris lacustris (Shmankevich, 1875), Parategastes caprinus Wellershaus, 1970 and Tisbella pulchella (Wilson, 1932) are new to the Colombian harpacticoid fauna. Comparative morphological comments and illustrations of these species are also provided. This is the third report on the harpacticoid copepod fauna in this hydrological system.


7.
Artículo
A new species of Monstrilla (Copepoda, Monstrilloida) from the plankton of a large coastal system of the northwestern Caribbean with a key to species
Suárez Morales, Eduardo (autor) ; Castellanos Osorio, Iván Arturo (autor) ;
Disponible en línea
Contenido en: ZooKeys Volumen 876 (2019), p. 111–123 ISSN: 1313–2970
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The genus Monstrilla Dana, 1849 is the most diverse of the copepod order Monstrilloida. Monstrilloid copepods are endoparasites of benthic polychaetes and molluscs; adult individuals are free-living, nonfeeding reproductive forms that briefly become part of the zooplankton community, where they are occasionally captured by plankton nets. Monstrilloid copepods are frequently found during routine plankton samplings of coastal and estuarine habitats, but they are rarely found in large numbers. The western sector of the Caribbean Sea is known to harbor a diverse monstrilloid fauna. The analysis of zooplankton samples obtained during nine years from Chetumal Bay, a large embayment of the Mexican Caribbean coast, yielded a male monstrilloid that was found to represent a new species. It is herein described following upgraded standards and compared with its congeners. A key to males and females of the Monstrilla species known from the northwestern Caribbean is also provided.


8.
- Artículo con arbitraje
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Monstrilloid copepods: the best of three worlds
Suárez Morales, Eduardo ;
Contenido en: Bulletin, Southern California Academy of Sciences Vol. 117, no. 2 (Aug. 2018), p. 92-103 ISSN: 0038-3872
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Resumen en: Inglés |
Resumen en inglés

Monstrilloids are one of the most intriguing groups of copepods. Their complex life cycle represents the successful evolutionary outcome of dealing with three distinct kinds of habitat, viz., planktonic, benthic, and endoparasitic, each of which presents particular challenges that have been overcome by monstrilloids. These copepods combine a unique set of strategies and adaptations to complete their life cycle. The non-feeding planktonic adult phase lacks mouthparts and their antennules are fixed, thus limiting their swimming abilities but they compensate for this handicap by having powerful swimming legs and probably generate a very distinct hydrographic signal that may be useful in avoiding predators and allowing sexual recognition between adult males and females. Parasitizing exclusively on abundant, gregarious sessile or sedentary benthic organisms represents an advantage in that potential hosts can be found without the need for long-distance dispersal. The endoparasitic stages of monstrilloids are unique; after infection by an early planktonic nauplius, successive nauplioid stages feed on their own vitellum while developing feeding tubes to absorb nutrients from their hosts. They grow within the host’s body as successive copepodite stages that are contained in a protective sheath. Preadult individuals exit through the host body wall causing significant host damage or death, behaving in these instances as parasitoids. The diversity of the group appears to be underestimated, and extensive geographic areas remain completely unknown for this group of copepods. More effort will be required to advance our knowledge of monstrilloid diversity and biology that are yet to be revealed.


9.
- Artículo con arbitraje
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Resumen en inglés

A new caligid copepod species, Pupulina mantensis sp. n. is described based on female and male specimens collected from the gills of the myliobatid elasmobranch Aetobatus cf. narinari Euphrasen, 1790 captured off the Pacific coast of Ecuador. The new species has a unique combination of characters that diverges from its known congeners, including: (i) weakly developed posterolateral processes on the genital complex; (ii) large spines on posterior surface of maxilliped basis (iii) abdomen slender, unsegmented, approximately 1/2 length and 1/5 width of genital complex; (iv) third exopodal segment of leg II with single long naked spine adjacent to minute, naked lateral spine; (v) velum of leg II with adjacent patch of denticles; (vi) caudal rami slightly less than half the length of genital complex; (vii) post-antennal process with robust, posteriorly directed tine, sclerotized stump posterolaterally, and two multi-sensillate papillae located on or near base of process (viii) post-oral process oval. The overall prevalence of P. mantensis sp. n. on its host was 37.5% and its mean abundance was 1.87 specimens per host. This is the second record of the genus Pupulina from Ecuador and the second record of Pupulina infecting rays of the Myliobatinae genus Aetobatus, of the subfamily Myliobatinae, after its discovery on A. ocellatus in Australia, thus confirming this expansion of its previously known host range to a new elasmobranch subfamily.


10.
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Planktonic phases in symbiotic copepods: a review
Ohtsuka, Susumu ; Madinabeitia, Ione (coaut.) ; Yamashita, Hirofumi (coaut.) ; Venmathi Maran, Balu Alagar (coaut.) ; Suárez Morales, Eduardo (coaut.) ; Ho, Ju-shey (coaut.) ;
Contenido en: Bulletin, Southern California Academy of Sciences Vol. 117, no. 2 (Aug. 2018), p. 104-119 ISSN: 0038-3872
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Resumen en español

In symbiotic copepods, most naupliar stages are typically planktonic, playing a primary role in dispersal, while the first copepodid usually represents the infective stage. Later copepodid stages, including adults, are associated with host organisms. Many symbiotic copepods have abbreviated life cycles, with a reduced number of naupliar stages and two different feeding habits. These patterns are presumably related to distinct life cycles strategies. Exceptional cases are exemplified by members of theMonstrillidae and Thaumatopsyllidae, both of which are protelean parasites, with infective nauplii and non-feeding planktonic adults. In the Caligidae, the life cycle follows a generalized pattern, but adults of many species like Caligus undulatus seem to exhibit a dual mode of life involving host switching. Adults leaving the first host become temporarily planktonic before attaching to the final host. This dual mode of life is also found in adults of the Ergasilidae. Abbreviation of the planktonic phase is characteristic for some symbiotic taxa, thus suggesting that they have evolved to become highly efficient in locating and infecting new hosts without needing long-distance larval dispersal. The life cycle of copepods associated with zooplankters is also briefly reviewed. Zooplankters are clearly less used as hosts by copepods than benthic invertebrates. It is likely that symbiotic copepods dynamically utilize planktonic phases in their life cycle, thus maintaining the balance between dispersal, host location, reproduction, and predator-avoidance strategies.