scholarly journals Efecto del sitio de procedencia sobre los atributos de las semillas de Cakile edentula (Brassicaceae), especie estabilizadora de duna costera

2019 ◽  
Vol 97 (1) ◽  
pp. 74 ◽  
Author(s):  
Ricardo Álvarez-Espino ◽  
Gabriela Mendoza-González ◽  
Candelaria Pérez-Martin ◽  
Xavier Chiappa-Carrara
Keyword(s):  
Moisture Content ◽  
Yucatan Peninsula ◽  
Seed Mass ◽  
Coastal Dune ◽  
Northern Coast ◽  
Seed Traits ◽  
Dune Vegetation ◽  
Yucatán Peninsula ◽  
Cakile Edentula ◽  
Study Species

<p><strong>Background</strong>: The morphological traits and germinative behavior of seeds vary within a species in response to multiple factors. Knowledge of this variability is important in understanding adaptation of species to environmental conditions.</p><p><strong>Question</strong>: Does the provenance of seeds of <em>Cakile edentula</em> affect seed traits? Does the climate of the sites of origin of the seeds influence their variability? Does the presence of light affect seed germination?</p><p><strong>Study species</strong>: <em>Cakile edentula</em><em> </em>(Bigelow) Hook.</p><p><strong>Study site</strong>: Coastal dune vegetation on the northern coast of the Yucatan Peninsula in August and October 2017.</p><p><strong>Methods</strong>: Seeds of <em>Cakile edentula</em> were collected in different locations on the northern coast of the Yucatan Peninsula. Under laboratory conditions it was assessed whether the origin of the seeds influenced some traits such as seed mass, moisture content, viability and germinative behavior.</p><p><strong>Results</strong>: Seed provenance significantly affected seed mass and moisture content in <em>C</em>. <em>edentula</em>. Moreover, the seeds of <em>C</em>. <em>edentula</em> collected from hot and humid sites germinate quickly and in greater proportion than the seeds from warm and dry sites of the Yucatan Peninsula. The seeds of <em>C</em>. <em>edentula</em> germinate preferably in darkness, regardless site of provenance.</p><strong>Conclusions</strong>: Some seed traits of <em>C</em>. <em>edentula</em> are affected by the site of provenance. Evidence suggests that climatic variation is likely to influence the initial characteristics of the life history in this coastal dune species.

scholarly journals Distribución potencial y conectividad del paisaje: criterios para reevaluar el grado de amenaza de Campylorhynchus yucatanicus (Aves: Troglodytidae)

2017 ◽  
Vol 65 (4) ◽  
pp. 1554
Author(s):  
Anay Serrano-Rodríguez ◽  
Griselda Escalona Segura ◽  
Alexis H. Plasencia Vázquez ◽  
Eduardo E. Iñigo Elias ◽  
Lorena Ruiz-Montoya
Keyword(s):  
Land Use ◽  
Urban Areas ◽  
Potential Distribution ◽  
Landscape Connectivity ◽  
Yucatan Peninsula ◽  
Distribution Model ◽  
Northern Coast ◽  
Dune Vegetation ◽  
Narrow Strip ◽  
Yucatán Peninsula

Geographic distribution and habitat quality are key criteria for assessing the degree of risk of species extinction threat. Campylorhynchus yucatanicus (Yucatán Wren, Troglodytidae) is an endemic bird of the Northern coast of the Yucatán Peninsula, Mexico, with a distribution restricted to a narrow strip of habitat, between Campeche and Yucatán states. Currently, the Yucatán coast has lost more than half of the coastal dune vegetation, and other habitats have been modified mainly because there is no urban development plan and the natural resources management is poor. These factors threaten C. yucatanicus, which is listed as a near threatened species by IUCN and as an endangered species by Mexican law NOM-059-2010. In this paper, C. yucatanicus´s potential distribution was modeled using 64 presence records from several sources (1960 y 2009), a set of climate variables, and a vegetation index layer of normalized difference (NDVI). To assess the degree of landscape connectivity we used a map of vegetation types and land use, distance to villages and paved roads. The potential distribution model showed an area of approximately 2 711 km2, which is 2 % of the total area of the Yucatán Peninsula distribution. In this area, only 27 % is protected by Biosphere Reserve category and only 10 % belong to core conservation areas, with land use restrictions and relatively effective protection. The populations from Ría Lagartos and Western Celestún regions appear to be the most isolated following the model of landscape connectivity. Landscape permeability among fragments of dune vegetation near the coast is low, mainly due to the distribution of urban areas. These results can be used to establish management strategies, and show that the species is in more delicate conditions than what it has been described by IUCN. We consider that C. yucatanicus should be given endangered category by IUCN, because of their distribution and the context of the current landscape connectivity.

scholarly journals Reproductive biology of the southern pufferfish, Sphoeroides nephelus (Actinopterygii: Tetraodontiformes: Tetraodontidae), in the northern coast off the Yucatan Peninsula, Mexico

2019 ◽  
Vol 49 (2) ◽  
pp. 133-146
Author(s):  
Jorge Peniche Perez ◽  
Carlos Gonzalez Salas ◽  
Harold Villegas Hernández ◽  
Raul Diaz Gamboa ◽  
Alfonso Aguilar Perera ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Yucatan Peninsula ◽  
Northern Coast ◽  
Yucatán Peninsula

Length-weight relationships of three fish species collected by recreational fishing in the northern coast of Yucatan Peninsula, Mexico

2017 ◽  
Vol 33 (6) ◽  
pp. 1249-1250 ◽  
Author(s):  
G. Poot-López ◽  
R. Díaz-Gamboa ◽  
C. González-Salas ◽  
S. Guillén-Hernández
Keyword(s):  
Fish Species ◽  
Yucatan Peninsula ◽  
Recreational Fishing ◽  
Northern Coast ◽  
Yucatán Peninsula

Longshore Sediment Transport on the Northern Coast of the Yucatan Peninsula

2012 ◽  
Vol 285 ◽  
pp. 1404-1417 ◽  
Author(s):  
Christian M. Appendini ◽  
Paulo Salles ◽  
E. Tonatiuh Mendoza ◽  
José López ◽  
Alec Torres-Freyermuth
Keyword(s):  
Sediment Transport ◽  
Yucatan Peninsula ◽  
Northern Coast ◽  
Yucatán Peninsula ◽  
Longshore Sediment Transport

scholarly journals Análisis de la forma de los otolitos como herramienta para la discriminación de la población del stock ( Haemulon Plumieri ) blanco en la costa norte de la Península de Yucatán, México

2012 ◽  
Vol 3 ◽  
pp. 157 ◽  
Author(s):  
Christina Treinen-Crespo ◽  
Harold Villegas-Hernández ◽  
Sergio Guillén-Hernández ◽  
Miguel Ángel Ruiz-Zárate ◽  
Carlos González-Salas
Keyword(s):  
Population Structure ◽  
Shape Analysis ◽  
Yucatan Peninsula ◽  
Pairwise Comparisons ◽  
Fourier Descriptors ◽  
Northern Coast ◽  
Otolith Shape ◽  
Structured Population ◽  
Yucatán Peninsula ◽  
Elliptic Fourier Descriptors

In this study, the population structure of the white grunt (Haemulon plumieri) from the northern coast of the Yucatan Peninsula was determined through an otolith shape analysis based on the samples collected in three locations: Celestún (N 20°49’,W 90°25’), Dzilam (N 21°23’, W 88°54’) and Cancún (N 21°21’,W 86°52’). The otolith outline was based on the elliptic Fourier descriptors, which indicated that the H. plumieri population in the northern coast of the Yucatan Peninsula is composed of three geographically delimited units (Celestún, Dzilam, and Cancún). Significant differences were observed in mean otolith shapes among all samples (PERMANOVA; F2, 99 = 11.20, P = 0.0002), and the subsequent pairwise comparisons showed that all samples were significantly differently from each other. Samples do not belong to a unique white grunt population, and results suggest that they might represent a structured population along the northern coast of the Yucatan Peninsula. En este estudio, la estructura de la población del ronco blanco (Haemulon plumieri) de la costa norte de la Península de Yucatán fue determinada a través del análisis de la forma del otolito, sobre la base de las muestras recolectadas en tres localidades: Celestún (N 20°49’, W 90°25’), Dzilam (N 21°23’, W 88°54’) y Cancún (N 21° 21’, O 86° 52’). El análisis del contorno de los otolitos se basó en los descriptores elípticos de Fourier, cuyo enfoque indicó que la población de H. plumieri en la costa norte de la Península de Yucatán se compone al menos de tres unidades delimitadas geográficamente (Celestún, Dzilam y Cancún). Se observaron diferencias significativas en la forma del otolito entre todas las muestras (PERMANOVA, F2, 99 = 11.20, P = 0.0002) y las comparaciones por pares posteriores indicaron que todas las muestras fueron significativamente diferentes una de otra. Al parecer, las muestras no pertenecen a una única población, y los resultados sugieren que podría representar una población bien estructurada a lo largo de la costa norte de la Península de Yucatán.

scholarly journals Population differentiation in Haemulon plumieri juveniles across the northern coast of the Yucatan Peninsula

2014 ◽  
Vol 20 (2) ◽  
pp. 129-137 ◽  
Author(s):  
H Villegas-Hernández ◽  
R Rodríguez-Canul ◽  
S Guillén-Hernández ◽  
R Zamora-Bustillos ◽  
C González-Salas
Keyword(s):  
Population Differentiation ◽  
Yucatan Peninsula ◽  
Northern Coast ◽  
Yucatán Peninsula

scholarly journals Description and distribution of Nemacystus howei (W.R. Taylor) Kylin (Chordariaceae) from the northern coast of the Yucatán peninsula

2020 ◽  
Vol 99 (1) ◽  
pp. 161-168
Author(s):  
Ileana Ortegón-Aznar ◽  
Ana M. Suárez ◽  
María del Carmen Galindo-de Santiago ◽  
Michael J. Wynne
Keyword(s):  
Sea Water ◽  
Yucatan Peninsula ◽  
Atlantic Coast ◽  
Morphological Characteristics ◽  
Small Mass ◽  
North Coast ◽  
Northern Coast ◽  
Yucatán Peninsula ◽  
Dry And Rainy Seasons ◽  
Light Brown Color

Background: There are few studies about Nemacystus on the Atlantic coast, and N. howei has been reported only once for Mexico; that record, however, did not provide a description of this species. Question: What are the morphological characteristics of Nemacystus howei and its distribution on the Yucatan coast? Species study: Macroalgae, Phaeophyceae, Nemacystus howei. Study site and year of study: North coast of Yucatán Peninsula of Mexico. Dry and rainy seasons from 2017 to 2019. Methods: Sampling was carried out at five localities, at 5 and 10 m depths, with scuba equipment. Specimens were preserved in diluted formalin in sea water; silica gel and dried-pressed vouchers are housed at the UADY Results: Six samples were collected at the five localities. Each one contains a small mass of filamentous of specimens of Nemacystus howei, that were found only during dry season, at both depths sampled. This alga has a thallus of an entangled filamentous mass of cylindrical, mucilaginous axes, of a light brown color. Younger branches have a solid central axis. Branching is abundant. The main, older axes are hollow. The assimilatory filaments are branched a few times, producing uniseriate colorless hairs and with plurilocular sporangia arising from the base. Nemacystus howei is easily confused with Cladosiphon occidentalis Kylin due to their similar morphology, branching pattern, and size. Conclusion: The significant morphological similarities between these species as well as the paucity of specific works on the Phaeophyceae of the Yucatan Peninsula may explain why Nemacystus howei had not been previously reported.

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