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29 resultados encontrados para: AUTOR: Herrera Pavón, Roberto Luis
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1.
Artículo
Changes in the fish community of a western Caribbean estuary after the expansion of an artificial channel to the sea
Schmitter Soto, Juan Jacobo (autor) ; Herrera Pavón, Roberto Luis (autor) ;
Contenido en: Water Vol. 11, no. 12, 2582 (2019), p. 1-17 ISSN: 2073-4441
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Resumen en: Inglés |
Resumen en inglés

Increased connectivity between coastal lagoons and the sea is expected to entail a greater proportion of marine species in the former. Chetumal Bay, estuary of the Hondo river into the Caribbean, had a limited access to the sea until the opening of the Zaragoza Canal. We sought changes in the fish community from 1999–2001 (just after an expansion of the canal) to 2015–2018. The same fishing gear was used, in the same localities, during all seasons. Total fish abundance and mean local richness decreased, although total abundance increased in the polyhaline zone. Diversity was greater in the oligohaline zone in 1999–2001, and in the mesohaline zone in 2015–2018. Three guilds were absent in 2015–2018: Medium-sized herbivores, large piscivores, and medium-sized planktivores. Abundance of small benthivores decreased by decade; medium-sized piscivores and small planktivores became more abundant in 2015–2018 in the polyhaline zone. These changes may be due to the opening of the channel, but illegal fishing outside the bay may explain the decrease in juveniles of large piscivores, and erosion in the innermost part may be destroying important habitats. Our findings can be a reference for similar situations, as coastal development and climate change interact and affect tropical estuaries.


2.
Artículo
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Influence of environmental variables on abundance and movement of bonefish (Albula vulpes) in the Caribbean Sea and a tropical estuary of Belize and Mexico
Pérez Cobb, Addiel Ubandes (autor) ; Schmitter Soto, Juan Jacobo (autor) ; Adams, Aaron J. (autor) ; Herrera Pavón, Roberto Luis (autor) ;
Disponible en línea
Contenido en: Environmental Biology of Fishes Volumen 102 (2019), p. 1421–1434 ISSN: 1573-5133
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Resumen en: Inglés |
Resumen en inglés

Bonefish (Albula vulpes) is a socioeconomically important species that supports a data-poor recreational fishery in developing countries. Understanding how environmental variables influence its abundance and movement is important for better decision-making.This study used mark-recapture to examine the association between abiotic (temperature, salinity, wind speed, tides moon phase, and sediment coarseness) and biotic (presence of predators and bottom vegetation) variables with bonefish movement and abundance in Corozal-Chetumal bay and the adjacent Caribbean coast of southern Mexico and northern Belize. We used seinesto capture bonefish, marked 9657 using dart tags and recaptured 595 fish (6.2% recapture rate) during 16 sample periods between January 2016 and February 2018. Marked bonefish size ranged 19.5–56.4 cm and recaptured 23.9–49.4 cm. Total abundance for each seine sample and distance between mark and recapture locations were used in two separate multiple stepwise regression analyses. Movement was negatively associated with temperature and predator presence, while sediment coarseness and moon phase were positively associated. Temperature increases were associated withshort-distance movements. Temperature decreases and high-illumination lunar phases were associated with longer-distance movement and likely related to spawning migrations. Presence of predators, like barracuda, was associated with low bonefish abundances and was likely an adaptive response to form multiple schools of low density by bonefish to avoid predation. These spatiotemporal movement and abundance patterns are recommended to be taken into account in fisheries and protected areas management and to inform the decision-making process in urban and tourism development in coastal habitats.


Resumen en: Inglés |
Resumen en inglés

Marine protected areas (MPAs) conserve diversity and abundance of fish communities. According to the biotic resistance hypothesis, communities with higher diversity and abundance should resist invasions better. To test this idea, the presence of lionfish in two Caribbean MPAs was studied: Parque Nacional Guanahacabibes (PNG) in Cuba and Parque Nacional Arrecifes de Xcalak (PNAX) in Mexico. Selection of these MPAs was based on both their different levels of success with enforcement and different abundances of native fish, with a more abundant native fish fauna at PNG. Underwater visual censuses were used to evaluate both the native fish structure and composition and at the same time distribution and abundance of lionfish. The abundance of potential predators on lionfish was also measured to determine possible effects of lionfish on both the abundance and the size of its prey and competitors. Lionfish showed higher abundance and larger size in PNG compared to PNAX, even though its probable competitors and predators were also more abundant and larger in PNG. Prey abundance and size decreased after the invasion. No correlation was detected between potential predators and lionfish, which might indicate natural predation is not substantial. In PNAX, lower abundance of prey, potential competitors and predators can also be attributed to historical overfishing, but this did not provide an advantage to lionfish. Lionfish were less abundant and reached smaller sizes in PNAX compared to PNG. This work confirms the effectiveness of lionfish culling at PNAX, but does not support the biotic resistence hypothesis that native fish might have controlled this invasive species.


Resumen en español

El proyecto estudió los movimientos de peces entre el mar Caribe (áreas protegidas de Xcalak, México y Bacalar Chico, Belice) y la bahía de Chetumal/Corozal, también un área protegida (Santuario del Manatí), por marcado-recaptura, isótopos estables y parasitología, con énfasis en el macabí (Albula vulpes), un recurso valioso y vulnerable, así como en la palometa (Trachinotus falcatus), pargos (Lutjanus griseus, L. apodus), barracuda (Sphyraena barracuda), pez aguja (Strongylura notata), y otros. Se buscó no sólo una descripción de las migraciones estacionales, sino también cambios entre la situación actual y la de hace una década y media, para la cual se comparó con datos propios previos, tanto en el arrecife de Xcalak como en la bahía de Chetumal, con el fin de estimar los posibles efectos de la apertura de una comunicación directa con el mar a través del canal de Zaragoza. Al cabo de tres años de trabajo y unos 100 días efectivos en el campo, se marcaron cerca de 9000 ejemplares de macabí y palometa y se recuperaron casi 600 marcas, además de analizar isotópicamente más de 100 muestras de tejido. También se realizaron talleres con pescadores en ambos países, tanto para aprender de su conocimiento tradicional, como para colaborar en la recuperación de marcas y compartir los avances. Por último, se examinó también la aproximación de especies exóticas invasoras a la bahía, tanto desde el mar (pez león, Pterois volitans) como desde el río Hondo (pez diablo, Pterygoplichthys pardalis). Los resultados del proyecto, que siguen analizándose, confirman el grado de dependencia mutua de ambos ecosistemas, bahía y mar adyacente, a través de los movimientos de los peces, y se detallan en tesis, artículos y ponencias sobre macabí, barracuda, pargos, pez aguja, pez león, pez diablo, y los cambios de la ictiofauna en general desde 1995 a la fecha.


5.
- Artículo con arbitraje
Resumen en español

El pez león (Pterois volitans) invadió la región del Caribe y tiene el potencial de alterar la composición y estructura de las comunidades de peces en los arrecifes coralinos. El objetivo de este estudio fue analizar los índices de diversidad en las comunidades de peces nativos en sitios invadidos por el pez león en dos áreas marinas protegidas (AMP) del Caribe y compararlos con datos previos a la invasión. En ambas AMP, Parque Nacional Guanahacabibes (PNG) en el occidente de Cuba y Parque Nacional Arrecifes de Xcalak (PNAX) en el S de Quintana Roo, se realizaron censos visuales de las especies de peces en hábitats durante las épocas de seca y lluvia del 2013-2015. Se evaluaron nueve sitios, mediante conteos estacionarios. Se registró mayor riqueza de especies en el PNG (43.47±5.14) que en el PNAX (40.22±4.96). No se observaron diferencias entre épocas en ninguna de las AMP. El pez león se ubicó entre las especies más abundantes del PNG. La abundancia media en el PNG (0.76 ± 1.25) fue mayor a la registrada en el PNAX (0.19±0.46). La diversidad disminuyó después de la llegada del pez león en un solo sitio del PNG y en dos sitios del PNAX, pero al parecer estos resultados están más asociados al efecto de la pesca que a la presencia del pez león. A partir de los resultados y asumiendo que los cambios en las comunidades de peces por el pez león podrían no detectarse aún, recomendamos seguir los monitoreos de los descriptores comunitarios para detectar cambios futuros en las comunidades de peces.

Resumen en inglés

Lionfish (Pterois volitans) invaded the Caribbean region with the potential to alter the composition and structure of native coral reef fish communities. The objective of this study was to analyze the diversity indices of these fish communities potentially affected by lionfish predation and to compare with pre-invasion data. The study was undertaken in two Caribbean marine protected areas (MPAs): Guanahacabibes National Park (PNG) in W Cuba and Xcalak Reefs National Park (PNAX) in S Quintana Roo. We carried out visual censuses of fish species in reef habitats during the dry and rainy seasons of the period 2013-2015. For this, nine sites were defined and evaluated using stationary counts. Our results showed higher species richness (43.47 ± 5.14) and mean abundance (0.76 ± 1.25) in PNG than in PNAX (40.22 ± 4.96, 0.19 ± 0.46, respectively). Diversity decreased after the arrival of lionfish in a single site of PNG and in two sites of the PNAX, but apparently, these results are more related to the fishing activity effect than to the lionfish presence. Based on the results and assuming that changes in the native fish communities by lionfish may not yet be detected, we recommend to continue the monitoring community descriptions in order to detect future changes in native fish communities.


6.
- Artículo con arbitraje
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Identification of potential sea turtle bycatch hotspots using a spatially explicit approach in the Yucatan Peninsula, Mexico
Cuevas Flores, Eduardo (autor) ; Guzmán Hernández, Vicente (autor) ; Uribe Martínez, Abigail (autora) ; Raymundo Sánchez, Ana (autora) ; Herrera Pavón, Roberto Luis (autor) ;
Disponible en línea
Contenido en: Chelonian Conservation and Biology Vol. 17, no. 1 (June 2018), p. 78-93 ISSN: 1071-8443
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Resumen en: Inglés |
Resumen en inglés

A spatially explicit participatory approach was used to collect fishing effort and sea turtle bycatch data from local fishers at 15 ports in the Yucatan Peninsula, Mexico. These data were combined with satellite telemetry data to define potential bycatch hotspots. This is the first participatory and spatially explicit study on sea turtle bycatch rates in the region. Hawksbill turtles (Eretmochelys imbricata) were the most frequently caught bycatch species, followed by loggerheads (Caretta caretta) and green turtles (Chelonia mydas). Gillnets were the most dangerous for sea turtles, with the greatest incidence of dead turtles caught. Three particular bycatch hotspots were identified at the northeast, northwest, and southwest coasts of the peninsula. Identification of bycatch hotspots is recognized worldwide as a key element for protecting these endangered species, particularly in a region such as the Yucatan Peninsula that harbors critical habitats for ≥ 4 sea turtle species, 2 of them categorized as critically endangered (hawksbills and Kemp’s ridleys [Lepidochelys kempii]). The spatially explicit participatory approach is versatile, easy to implement, and strategic for generating information under marine spatial planning for endangered species conservation.


7.
- Artículo con arbitraje
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Interdecadal trends in composition, density, size, and mean trophic level of fish species and guilds before and after coastal development in the Mexican Caribbean
Schmitter Soto, Juan Jacobo (autor) ; Aguilar Perera, Alfonso (coaut.) ; Cruz Martínez, Alicia (coaut.) ; Herrera Pavón, Roberto Luis (coaut.) ; Morales Aranda, Aura Aletse (coaut.) ; Cobián Rojas, Dorka (coaut.) ;
Contenido en: Biodiversity and Conservation Vol. 27, no. 2 (February 2018), p. 459-474 ISSN: 1572-9710
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Resumen en: Inglés |
Resumen en inglés

This study explores the possible influence of human coastal development (before and after) and protected area status (within and outside a marine protected area, MPA) on composition, density, and maximum size of fish species and guilds, including mean trophic level of the fish community, in four localities of the Yucatan Peninsula, Mexican Caribbean. Reef fish density, maximum length, species composition, and trophic guilds were recorded by SCUBA belt transects and stationary points in fore reef and lagoon reef areas at decadal intervals (1995–1998, 2006–2010, 2014–2015). Mean density of most species and guilds decreased significantly through the years, as also did mean trophic level of the fish community. Some fish species increased in length. Fish density for many species was larger outside than inside the MPA in 1995–1998; however, the difference tended to disappear in the more recent decades, which reflects either a positive effect of the MPA, or a detrimental effect of coastal development in the non-protected area. Nevertheless, the overall negative trends suggest a regional or global rather than a local cause.


8.
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Ecological regime shift drives declining growth rates of sea turtles throughout the West Atlantic
Bjorndal, Karen A. ; Bolten, Alan B. (coaut.) ; Chaloupka, Milani (coaut.) ; Saba, Vincent S. (coaut.) ; Bellini, Cláudio (coaut.) ; Marcovaldi, Maria A. G. (coaut.) ; Santos, Armando J. B. (coaut.) ; Wurdig Bortolon, Luis Felipe (coaut.) ; Meylan, Anne B. (coaut.) ; Meylan, Peter A. (coaut.) ; Gray, Jennifer (coaut.) ; Hardy, Robert (coaut.) ; Brost, Beth (coaut.) ; Bresette, Michael (coaut.) ; Gorham, Jonathan C. (coaut.) ; Connett, Stephen (coaut.) ; Van Sciver Crouchley, Barbara (coaut.) ; Dawson, Mike (coaut.) ; Hayes, Deborah (coaut.) ; Diez, Carlos E. (coaut.) ; van Dam, Robert P. (coaut.) ; Willis, Sue (coaut.) ; Nava, Mabel (coaut.) ; Hart, Kristen M. (coaut.) ; Cherkiss, Michael S. (coaut.) ; Crowder, Andrew G. (coaut.) ; Pollock, Clayton (coaut.) ; Hillis-Starr, Zandy (coaut.) ; Muñoz Tenería, Fernando A. (coaut.) ; Herrera Pavón, Roberto Luis (coaut.) ; Labrada Martagón, Vanessa (coaut.) ; Lorences, Armando (coaut.) ; Negrete Philippe, Ana (coaut.) ; Lamont, Margaret M. (coaut.) ; Foley, Allen M. (coaut.) ; Bailey, Rhonda (coaut.) ; Carthy, Raymond R. (coaut.) ; Scarpino, Russell (coaut.) ; McMichael, Erin (coaut.) ; Provancha, Jane A. (coaut.) ; Brooks, Annabelle (coaut.) ; Jardim, Adriana (coaut.) ; López Mendilaharsu, Maria de los Milagros (coaut.) ; González Paredes, Daniel (coaut.) ; Estrades, Andrés (coaut.) ; Fallabrino, Alejandro (coaut.) ; Martínez-Souza, Gustavo (coaut.) ; Vélez Rubio, Gabriela M. (coaut.) ; Boulon Jr., Ralf H. (coaut.) ; Collazo, Jaime A. (coaut.) ; Wershoven, Robert (coaut.) ; Guzmán Hernández, Vicente (coaut.) ; Stringell, Thomas B. (coaut.) ; Sanghera, Amdeep (coaut.) ; Richardson, Peter B. (coaut.) ; Broderick, Annette C. (coaut.) ; Phillips, Quinton (coaut.) ; Calosso, Marta (coaut.) ; Claydon, John A. B. (coaut.) ; Metz, Tasha L. (coaut.) ; Gordon, Amanda L. (coaut.) ; Landry Jr., Andre M. (coaut.) ; Shaver, Donna J. (coaut.) ; Blumenthal, Janice (coaut.) ; Collyer, Lucy (coaut.) ; Godley, Brendan J. (coaut.) ; McGowan, Andrew (coaut.) ; Witt, Matthew J. (coaut.) ; Campbell, Cathi L. (coaut.) ; Lagueux, Cynthia J. (coaut.) ; Bethel, Thomas L. (coaut.) ; Kenyon, Lory (coaut.) ;
Contenido en: Global Change Biology Vol. 23, no. 11 (November 2017), p. 4556–4568 ISSN: 1365-2486
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Resumen en: Inglés |
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Somatic growth is an integrated, individual-based response to environmental conditions, especially in ectotherms. Growth dynamics of large, mobile animals are particularly useful as bio-indicators of environmental change at regional scales. We assembled growth rate data from throughout the West Atlantic for green turtles, Chelonia mydas, which are long-lived, highly migratory, primarily herbivorous mega-consumers that may migrate over hundreds to thousands of kilometers. Our dataset, the largest ever compiled for sea turtles, has 9690 growth increments from 30 sites from Bermuda to Uruguay from 1973 to 2015. Using generalized additive mixed models, we evaluated covariates that could affect growth rates; body size, diet, and year have significant effects on growth. Growth increases in early years until 1999, then declines by 26% to 2015. The temporal (year) effect is of particular interest because two carnivorous species of sea turtles—hawksbills, Eretmochelys imbricata, and loggerheads, Caretta caretta—exhibited similar significant declines in growth rates starting in 1997 in the West Atlantic, based on previous studies. These synchronous declines in productivity among three sea turtle species across a trophic spectrum provide strong evidence that an ecological regime shift (ERS) in the Atlantic is driving growth dynamics. The ERS resulted from a synergy of the 1997/1998 El Niño Southern Oscillation (ENSO)—the strongest on record—combined with an unprecedented warming rate over the last two to three decades. Further support is provided by the strong correlations between annualized mean growth rates of green turtles and both sea surface temperatures (SST) in the West Atlantic for years of declining growth rates (r = −.94) and the Multivariate ENSO Index (MEI) for all years (r = .74). Granger-causality analysis also supports the latter finding.

We discuss multiple stressors that could reinforce and prolong the effect of the ERS. This study.


9.
Artículo
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Somatic growth rates of immature green turtles Chelonia mydas inhabiting the foraging ground Akumal bay in the Mexican Caribbean Sea
Labrada Martagón, Vanessa (coaut.) ; Muñoz Tenería, Fernando A. (coaut.) ; Herrera Pavón, Roberto Luis (coaut.) ; Negrete Philippe, Ana C. (coaut.) ;
Contenido en: Journal of Experimental Marine Biology and Ecology Vol. 487 (February 2017), p. 68-78 ISSN: 0022-0981
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Resumen en: Inglés |
Resumen en inglés

Growth dynamics helps to elucidate demographic aspects, such as age at specific size and size at maturity or first reproduction, which are important for sea turtle management. The Mexican Caribbean Sea is an important feeding ground for green turtles, but demographic data for the turtles are lacking. Size-based growth rates of immature green turtles inhabiting a foraging ground at Akumal Bay (20°24'0″N and 87°19'16″W) were obtained by using a mixed longitudinal sampling design from historic mark–recapture data (2004–2014). Curved carapace length (CCL) of immature turtles at first capture ranged from 27.8–81.0 cm and minimum size at recruitment was 27.8 cm CCL. Recapture intervals ranged from 1 to 49 months, 72% of the recaptures (n=172) occurred in less than a year and 90% before 1.5 years. A monotonic size-specific growth function displays the maximum growth rate (6.25 cm yr−¹) at about 46–48 cm CCL before starts declining steadily at> 60 cm CCL. Mean size presented a non-linear relationship with growth rates and year of capture had a negative linear effect over growth; the lowest annual mean growth rates were registered during 2009 and 2012. Based on GAM predictions an immature sea turtle recruited to the feeding ground (28 cm CCL) would require between 13 and 14 years to reach the average nesting size, supporting field observations. A negative linear relationship between annual mean growth rate and the relative estimated sea turtle abundance (p=0.001) suggests a density-dependent effect. The quantitative information presented will help understand life history patterns and provide a baseline to assess future dynamics of this green turtle population.


10.
Artículo
Composición y estructura de la ictiofauna del río Hondo, México-Belice, con base en el uso del arpón
López Vila, Jesús Manuel ; Valdéz Moreno, Martha (coaut.) ; Schmitter Soto, Juan Jacobo (coaut.) ; Mendoza Carranza, Manuel (coaut.) ; Herrera Pavón, Roberto Luis (coaut.) ;
Contenido en: Revista Mexicana de Biodiversidad Vol. 85, no. 3 (septiembre de 2014) ISSN: 1870-3453
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Resumen en: Español | Inglés |
Resumen en español

Se determinó la composición y estructura de la ictiofauna del río Hondo y la variación espacial de éstas en función de los parámetros ambientales. Se realizaron 3 muestreos durante marzo, abril y mayo de 2012, en 6 sitios a lo largo del río. Los datos usados para determinar la estructura se obtuvieron con ayuda de un arpón de 58.5 cm, utilizado durante 2 h de buceo libre en cada punto de muestreo. Para complementar la lista de especies se utilizaron redes agalleras, palangres, nasas y anzuelos. Además, se realizó una revisión bibliográfica y se consultó material de la colección de peces de ECOSUR en Chetumal. La lista sistemática se conformó por 40 especies en 33 géneros, 18 familias y 11 órdenes. La familia mejor representada fue Cichlidae, incluida la especie exótica Oreochromis niloticus. Los parámetros ambientales que mejor describieron la variación de la distribución y abundancia en los peces en el río Hondo fueron: la anchura del río, distancia a la boca, transparencia, profundidad, concentración de oxígeno disuelto y conductividad. La relación entre las especies y las variables ambientales fue alta en ambos ejes (0.89 y 0.79). Ambientalmente, el río se puede zonificar en 3 partes, aunque su ictiofauna puede dividirse en 2 conjuntos principales.

Resumen en inglés

Composition and structure of the Hondo River ichthyofauna and its spatial variation were determined as a function of environmental parameters. Six sites along the river were sampled in March, April and May 2012. Data for estimating structure of fish assemblages was obtained by means of a 58.5 cm harpoon during 2 hours of free diving at each sampling site. The species list for the study area was completed with the aid of gillnets, longlines, double-cone traps, and hook-and-line. In addition, a bibliographical research performed as well as the ichthyological collection of ECOSUR at Chetumal was checked. The systematic list includes 40 species in 33 genera, 18 families and 11 orders. The richest family was Cichlidae, including the exotic Oreochromis niloticus. The environmental parameters that best described distribution and abundance of fish in the Hondo River were river width, distance to mouth, transparency, depth, dissolved oxygen concentration, and conductivity. Correlation between species and environmental parameters was high in both axis (0.89 and 0.79). The river was classified into 3 environmental zones, although its fish fauna could be divided in 2 main assemblages.