Papers by Alberto De Jesús Navarrete
HAL (Le Centre pour la Communication Scientifique Directe), Jun 24, 2022
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Communications Biology, 2018
Accurate assessments of biodiversity are crucial to advising ecosystem-monitoring programs and un... more Accurate assessments of biodiversity are crucial to advising ecosystem-monitoring programs and understanding ecosystem function. Nevertheless, a standard operating procedure to assess biodiversity accurately and consistently has not been established. This is especially true for meiofauna, a diverse community (>20 phyla) of small benthic invertebrates that have fundamental ecological roles. Recent studies show that metabarcoding is a cost-effective and time-effective method to estimate meiofauna biodiversity, in contrast to morphological-based taxonomy. Here, we compare biodiversity assessments of a diverse meiofaunal community derived by applying multiple taxonomic methods based on comparative morphology, molecular phylogenetic analysis, DNA barcoding of individual specimens, and metabarcoding of environmental DNA. We show that biodiversity estimates are strongly biased across taxonomic methods and phyla. Such biases affect understanding of community structures and ecological int...
Composición, distribución y abundancia de larvas de moluscos gastrópodos en el sur de Quintana Roo, México y norte de Belice
DOAJ (DOAJ: Directory of Open Access Journals), Dec 1, 2000
Para conocer la composicion, abundancia y distribucion de larvas de gastropodos, se realizaron mu... more Para conocer la composicion, abundancia y distribucion de larvas de gastropodos, se realizaron muestreos mensuales de abril a diciembre de 1996 en el sur de Quintana Roo, Mexico y norte de Belice. Las recolectas se hicieron en seis sitios de Banco Chinchorro, cuatro de la costa sur y seis en Hol-Chan, Belice. Las recolectas fueron hechas entre las 10 y 20 hrs, se bombearon 2.5 m3 de agua de mar por recolecta en un tiempo de diez minutos, filtrando a los organismos en una malla de 202 μm. Se identificaron un total de 27 especies de moluscos, las especies de mayor abundancia y de mas amplia distribucion en cada zona fueron: en la costa sur Rissoina sp. 1, Limacina sp. 1 y Natica sp., en Banco Chinchorro, Limacina sp. 1, Creseis acicula, Cerithiopsis hero y Rissoina sp. 1 y en Hol-Chan, Limacina sp. 2, Alaba incerta y Rissoina sp. 1. En general la mayor abundancia de moluscos se presento en la epoca de lluvias. Aparentemente la presencia de corrientes y vientos fuertes y otros factores biologicos como el alimento, controlan la distribucion y abundancia de las larvas.
Zootaxa, Jan 13, 2015
A small bodied, free-living marine nematode, Rhynchonema dighaensis sp. nov., is described from t... more A small bodied, free-living marine nematode, Rhynchonema dighaensis sp. nov., is described from the intertidal sand of the east coast of India. It is characterized by having a small buccal cavity, longer left spicule and symmetrical dorsal gubernaculum apophysis. Other species of the genus are discussed with their type locality. A modified key has been prepared for species of Rhynchonema with an illustrated guide. Species of Rhynchonema primarily differ from each other by the shape and size of the spicules, shape of the gubernaculum and dorsal apophysis, size of the buccal cavity and position of the amphid.
Population evaluation of Queen Conch (Strombus gigas), Alacranes Reef National Park, Yucatan, Mexico : final report
Ecosistemas y Recursos Agropecuarios, Aug 20, 2014
Proposal for conservation of Queen Conch (Strombus gigas) in the Alacranes Reef
New Echinoderes (Kinorhyncha: Cyclorhagida) from Mexico: Molecular barcoding demonstrate species delimitation between highly similar morphospecies
Zoologischer Anzeiger
Size spectra, biomass, and trophic groups of free‐living marine nematodes along a water‐depth gradient in the northwestern Gulf of Mexico
Marine Ecology
[Composition, distribution and abundance of gastropod larvae in the South of Quintana Roo,Mexico and north of Belice]
Revista De Biologia Tropical, Dec 1, 2000
To know the composition, abundance and distribution of gastropod larvae, monthly samplings were c... more To know the composition, abundance and distribution of gastropod larvae, monthly samplings were carried out in the south of Quintana Roo, Mexico and north of Belize, from April to December, 1996. Collections were made in six sites at Chinchorro Bank, four in the South Coast and six at Hol-Chan, Belize, between the 10 and 20 hrs. At each station 2.5 m3 of seawater were pumped through a 202 microns mesh; 27 species were identified. The most abundant species were: South Coast, Rissoina sp. 1., Limacina sp. 1 and Natica sp. 1, Chinchorro Bank, Limacina sp. 1, Creseis acicula, Cerithiopsis hero and Rissoina sp. 1 and Hol-Chan, Limacina sp. 2, Alaba incerta and Rissoina sp. 1. The highest abundance was in rainy season. Apparently the presence of winds, coastal currents and food availability, control the distribution and abundance of larvae.
Figure 1 in Across-shore distribution of Ocypode quadrata burrows in relation to beach features and human disturbance
Figure 1. Location and Google Earth images of study sites. Map data: Google, Digital Globe and IN... more Figure 1. Location and Google Earth images of study sites. Map data: Google, Digital Globe and INEGI.
Figure 5 in Across-shore distribution of Ocypode quadrata burrows in relation to beach features and human disturbance
Figure 5. Temporal variations (mean ± SE) of the ghost crab habitat envelope at the three studied... more Figure 5. Temporal variations (mean ± SE) of the ghost crab habitat envelope at the three studied beaches.
Distribución, abundancia y diversidad de los nematodos (phylum Nematoda) bénticos de la Sonda de Campeche, México. Enero 1987
Revista De Biologia Tropical, 2016
En enero de 1987 se estudio la distribucion, abundancia y diversidad de los nematodos benticos de... more En enero de 1987 se estudio la distribucion, abundancia y diversidad de los nematodos benticos de la Sonda de Campeche (Golfo de Mexico) en diez estaciones de muestreo. Los sedimentos fueron recolectados con una draga Van Veen de 0.1 m2 La comunidad quedo representada por 4 ordenes, 39 familias, 86 generos y 96 especies. Los ordenes mas importantes fueron; Chromadorida, Monhysterida y Enoplida . Los generos Dorylaimopsis. Metacomesoma y Sabatieria dominaron en las estaciones de sedimentos limo-arcillos, mientras que Elzalia y Retr otheristus dominaron en Cayo Arcas que presento un sedimento arenoso. La diversidad (H') fue 4.0 bits/indo como minimo y 5.87 bits/indo como maximo. En las estaciones de muestreo se presentaron las cuatro categorias alimenticias; alimentadores de deposito ( lA, lB), alimentadores de superficie (2A) y omnivoros depredadores (2B), con un claro predominio de los primeros organismos,sip embargo en todas las estaciones se observo la presencia de todos los t...
Mil tarjetas de deriva se liberaron en noviembre de 1994 y octubre de 1996 con el fin de determin... more Mil tarjetas de deriva se liberaron en noviembre de 1994 y octubre de 1996 con el fin de determinar la direccion y velocidad de la corriente superficial en el sur de Quintana Roo y relacionarlas con el transporte de larvas. Los puntos de liberacion se determinaron con un GPS en tanto que los de recuperacion se ubicaron en un mapa de acuerdo con la informacion proporcionada por el recolector de la tarjeta y se calcularon las coordenadas. Las distancias entre los puntos se calcularon con el programa ARCVIEW version 6.0. El tiempo de arrastre de las tarjetas se calculo mediante la diferencia entre la fecha y hora de liberacion y la fecha y hora de recuperacion. Cuando mas de una tarjeta arribo al mismo sitio, se considero el menor tiempo de deriva para el calculo de las velocidades. L
Community Ecology, 2016
Banco Chinchorro is the largest reef in the Mexican Caribbean. Historically, spiny lobster, queen... more Banco Chinchorro is the largest reef in the Mexican Caribbean. Historically, spiny lobster, queen conch and over 20 other reef species have been exploited here. Multispecies intervention management from an ecosystem perspective has been developed in this area; however, an assessment of the effects of such practices on ecosystem health is required. Five quantitative trophic models were constructed using Ecopath with Ecosim. The results show that, in terms of biomass, benthic autotrophs are the dominant group in all communities. Ecosystem Network Analysis indices showed that Cueva de Tiburones was the most mature, developed, complex and healthy subsystem, but, El Colorado and La Baliza were the subsystems most resistant to disturbances. The fisheries mainly concentrate on primary (La Baliza and Cueva de Tiburones sites) and secondary consumers (La Caldera, Chancay, and El Colorado). The greatest propagation of direct and indirect effects, estimated by Mixed Trophic Impacts and Ecosim simulations, were generated by the benthic autotrophs, small benthic epifauna, benthic-pelagic carnivorous fish and benthic carnivorous fish, among others. In contrast, the System Recovery Time showed different patterns among subsystems, indicating several compartments that reduce resilience. Considering the structure, dynamics, trophic functioning and ecosystem health of Banco Chinchorro, its ecological heterogeneity highlights the need for the design of a specific (by subsystem) management strategy, particularly because different species or functional groups present greater sensitivity to human interventions in each community.
Revista de Biología Tropical, 1997
SIDALC - Servicio de Informacion y Documentacion Agropecuaria de las Americas.
RESUMEN El caracol rosado Strombus gigas, se distribuye en la zona de pastos, principalmente en l... more RESUMEN El caracol rosado Strombus gigas, se distribuye en la zona de pastos, principalmente en la fase juvenil. Su caracter de consumidor de epefitas de Thalassia y otras microalgas, hacen que para fines de manejo se deba determinar la cantidad de alimento disponible en los diferentes ambientes. En punta Gavilan (PG) y Banco Chinchorro (BCH) se instalaron corrales de cultivo en los ambientes de "thalassia" (T) y "thalassia+Arena" (T+A). Para evaluar la biomasa vegetal en cada sistema, se hicieron colectas mensuales de la cobertura vegetal, utilizando un cuadrante de 0.01 m2, abarcando el periodo octubre 1993-marzo 1994. En cada ambiente se obtuvo una muestra y tres réplicas, la biomasa de pastos y epífitas se determinó de acuerdo a la tÄcnica de Nugent (1978). En PG tanto en el ambiente T y T+A la biomasa de Thalassia y epifitas de Thalassia alcanzo un promedio de 40.5 g.ps.m2 y 29.4 g.ps.m2, mientras que en BCH fue de 23.4 g.ps.m2 y 16.2 g.ps.m2. La comparación de la biomasas totales de los sitios de colecta, encontramos que en BCH la biomasa vegetal es mayor que en PG, pero que en este sitio, la disponibilidad de alimento (algas epífitas) para los caracoles juveniles de Strombus gigas es notablemente mayor, observandose que el incremento marginal de los caracoles por ambiente es mayor en T+A, con un promedio de 2.150 mm mensuales en PG, mientras que para BCH no hubo diferencia entre ambientes con un incremento marginal promedio de 1.582 mm por mes.
Uploads
Papers by Alberto De Jesús Navarrete