abstract：:Brycon henni is a native species in Magdalena's River basin, and because of its cultural and economic importance, is strongly overexploited. This study aimed to describe the genetic variability and population structure of this species from Nare and Guatapé rivers basins. A total of 195 individuals were collected and D...

journal_title：Revista de biologia tropical

authors： Hurtado-Alarcón JC,Mancera-Rodríguez NJ,Saldamando-Benjumea CI

更新日期：2011-03-01 00:00:00

abstract：:Several factors control the decomposition in terrestrial ecosystems such as humidity, temperature, quality of litter and microbial activity. We investigated the effects of rainfall and soil plowing prior to the establishment of Acacia mangium plantations, using the litterbag technique, during a six month period, in fo...

journal_title：Revista de biologia tropical

authors： Castellanos-Barliza J,León Peláez JD

更新日期：2011-03-01 00:00:00

abstract：:Cicadellidae in one of the best represented families in the Neotropical Region, and the tribe Proconiini comprises most of the xylem-feeding insects, including the majority of the known vectors of xylem-born phytopathogenic organisms. The cytogenetics of the Proconiini remains largely unexplored. We studied males of T...

journal_title：Revista de biologia tropical

authors： de Bigliardo GR,Gabriel Virla E,Caro S,Murillo Dasso S

更新日期：2011-03-01 00:00:00

abstract：:Deforestation of tropical forests is threatening monkey biodiversity and their health status, dependent of an ecologically undisturbed area. To asses this relationship, we analyzed parasite occurrence in their intestines. The study was conducted at the Estación Biológica La Suerte (EBLS), Limón, Costa Rica. The group ...

journal_title：Revista de biologia tropical

authors： Chinchilla M,Urbani B,Valerio I,Vanegas JC

更新日期：2010-12-01 00:00:00

abstract：:The Mato Grosso is a typical Atlantic Forest stream located on the East coast of Brazil, approximately 70 km from Rio de Janeiro city. From its source at about 800m a.s.l, the stream drains a 30km2 area of the Northwestern part of the municipality of Saquarema, state of Rio de Janeiro and flows into the Saquarema Lago...

journal_title：Revista de biologia tropical

authors： Rezende CF,Moraes M,Manna LR,Leitão RP,Caramaschi EP,Mazzoni R

更新日期：2010-12-01 00:00:00

abstract：:Abstract: The phenotypic structure within and between plant populations is generally influenced by their distribution patterns in space and time; therefore, the study of their divergence is a central issue for the understanding of their microevolutive processes. We boarded the hypothesis that three populations of Espe...

journal_title：Revista de biologia tropical

authors： Benavides F,Burbano J,Burbano D,Prieto R,Torres C

更新日期：2010-12-01 00:00:00

abstract：:Sponges constitute one of the most diverse and abundant animal groups in the marine tropical benthos especially in coral reefs, though poorly studied to species level. The aim of this study is to characterize the sponge community along a depth gradient at Isla Larga (Parque Nacional San Esteban, Venezuela) fringe reef...

journal_title：Revista de biologia tropical

authors： Núñez Flores M,Rodríguez-Quintal JG,Cristina Díaz M

更新日期：2010-10-01 00:00:00

abstract：:This study describes temporal and spatial abundance patterns of echinoderm larvae in La Parguera, Puerto Rico. For the temporal study, larvae were sampled by a series of monthly tows taken with a 64 microm mesh net between the new and full moon from April 2005 to July 2006, September 2006 and August 2007. In order to ...

journal_title：Revista de biologia tropical

authors： Williams SM,Jorge GS

更新日期：2010-10-01 00:00:00

abstract：:In June, 2002, the government of Dominica requested assistance in evaluating the coral culture and transplantation activities being undertaken by Oceanographic Institute of Dominica (OID), a coral farm culturing both western Atlantic and Indo-Pacific corals for restoration and commercial sales. We assessed the culture...

journal_title：Revista de biologia tropical

authors： Bruckner AW,Borneman EH

更新日期：2010-10-01 00:00:00

abstract：:A transformation of any natural ecosystem to an agricultural or forest system leads to an important soil modification, not only in the total carbon pool, but also in the carbon associated to the microbial biomass. This way, carbon quantification on soil quality is important for the determination of impacts of agricult...

journal_title：Revista de biologia tropical

authors： Zabala M,Gómez Y

更新日期：2010-09-01 00:00:00

abstract：:Redescription of Parodon caliensis and Saccodon dariensis (Characiformes: Parodontidae). Parodontidae family is a group of Characiformes fishes distributed throughout South America and parts of Panama, except in the basins of the southern Bahia state in Brasil on the Atlantic coast, Patagonia and the Amazon river chan...

journal_title：Revista de biologia tropical

authors： Londoño-Burbano A,Román-Valencia C

更新日期：2010-09-01 00:00:00

abstract：:River floodplains have a high biological diversity that is intensely influenced by vegetation dynamics, changes in space and time scales, and the river's hydrological regime. The vegetation composition of the medium and lower Paraná River has been analyzed previously, with different approaches and criteria that cannot...

journal_title：Revista de biologia tropical

authors： Franceschi EA,Torres PS,Lewis JP

更新日期：2010-06-01 00:00:00

abstract：:Fatty acids have been successfully used to trace the transfer of organic matter in coastal and estuarine food webs. To delineate these web connections, fatty acid profiles were analyzed in species of microbes (Azotobacter vinelandii, and Lactobacillus xylosus), prawns (Metapenaeus monoceros and Macrobrachium rosenberg...

journal_title：Revista de biologia tropical

authors： Alikunhi NM,Narayanasamy R,Kandasamy K

更新日期：2010-06-01 00:00:00

abstract：:In spite of their economic importance, coral reef communities of the world are rapidly decreasing, and an adequate management planification is needed. The benthic and fish communities of Dos Mosquises Sur and Madrizqui at Los Roques National Park, and Caiman and Cayo Norte at Morrocoy National Park, in Venezuela were ...

journal_title：Revista de biologia tropical

authors： Cróquer A,Debrot D,Klein E,Kurten M,Rodríguez S,Bastidas C

更新日期：2010-05-01 00:00:00

abstract：:We surveyed the trophic components in six species of Bahía de Navidad and Bahía de Chamela: Microlepidotus brevipinnis, Caranx caballus, Haemulon flaviguttatum, Lutjanus guttatus, L. argentiventris and Mulloidichthys dentatus. Two main seasonal periods were considered: 1) North Equatorial Counter Current NECC period i...

journal_title：Revista de biologia tropical

authors： Flores Ortega JR,Godínez Domínguez E,Rojo Vázquez JA,Corgos A,Galván Piña VH,Sansón González G

更新日期：2010-03-01 00:00:00

abstract：:Megalopta Smith, 1853, is a Neotropical genus of nocturnal or crepuscular bees. Two subgenera are recognized with most of its nearly 30 species placed in the nominate subgenus. Species of Megalopta s. str. are more commonly collected than species of Noctoraptor Engel et al. 1997, all presumably parasites of Megalopta ...

journal_title：Revista de biologia tropical

authors： Gonzalez VH,Griswold T,Ayala R

更新日期：2010-03-01 00:00:00

abstract：:Coral reefs are impacted by a range of environmental variables that affect their growth and survival, the main factors being the high irradiance and temperature fluctuations. Specimens of Pocillopora capitata Verrill 1864 were exposed to photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) for 32 ...

journal_title：Revista de biologia tropical

authors： Liñán-Cabello MA,Flores-Ramírez LA,Cobo-Díaz JF,Zenteno-Savin T,Olguín-Monroy NO,Olivos-Ortiz A,Tintos-Gómez A

更新日期：2010-03-01 00:00:00

abstract：:Intra-specific body size variation is common and often is assumed to be adaptive. Studies of body size variation among sites should include or consider environmental and ecological variables in their designs. Additionally, reciprocal transplant or common garden studies will support which variables are really contribut...

journal_title：Revista de biologia tropical

authors： Bock BC,Ortega AM,Zapata AM,Páez VP

更新日期：2009-12-01 00:00:00

abstract：:Huperzia brevifolia is one of the dominant species of the genus Huperzia living in paramos and superparamos from the Colombian Andes. A detailed study of the sporangium's ontogeny and sporogenesis was carried out using specimens collected at 4200m above sea level, in Parque Natural Nacional El Cocuy, Colombia. Small p...

journal_title：Revista de biologia tropical

authors： Barón EJ,Landazábal LV,Ballesteros HG,Prieto DA,Hleap JS

更新日期：2009-12-01 00:00:00

abstract：:Fishing activity in two artificial reefs (ARs) was monitored between August 2001 and August 2002 in the gulf of Morrosquillo, to investigate their possible impact on the fishery dynamics. We determined catch per unit effort (CPUE) and catch composition, and found 19 species in Punta de Piedra and 36 in Tolú (16 specie...

journal_title：Revista de biologia tropical

authors： Delgadillo-Garzón O,García CB

更新日期：2009-12-01 00:00:00

abstract：:Basic aspects of the reproductive biology are largely unknown for most tropical tree species, although they are important elements to understand the impacts of anthropogenic activities as logging and forest fragmentation on these populations. In this study, data are presented on leaf and reproductive phenology, fruit ...

journal_title：Revista de biologia tropical

authors： Solís S,Lobo J,Grimaldo M

更新日期：2009-09-01 00:00:00

abstract：:Zooplankton sampling was carried out monthly from January to December 1990 at station A near the coastline, and station B near the reef barrier, in a tropical coral reef lagoon in the Mexican Caribbean Sea. Samplings were made at midnight, near surface, with a conical net (mouth 0.40 m, mesh 330 microm) for 10 min. Sa...

journal_title：Revista de biologia tropical

authors： Alvarez-Cadena JN,Ordóñez-López U,Almaral-Mendivil AR,Uicab-Sabido A

更新日期：2009-09-01 00:00:00

abstract：:Humoral response of paracoccidioidomycosis sera in hamsters with different Venezuelan isolates. Paracoccidioidomycosis (PCM) is a progressive systemic mycosis caused by the fungus Paraccocidioides brasiliensis (Pb), endemic to Venezuela and Latin America. In this study, eight different Venezuelan isolates obtained fro...

journal_title：Revista de biologia tropical

authors： Spencer LM,Mateu G,Magaldi S,García F,Mata-Essayag S

更新日期：2009-09-01 00:00:00

abstract：:Paternal behavior and testosterone plasma levels in the Volcano Mouse Neotomodon alstoni (Rodentia: Muridae). Although initially it was thought that testosterone inhibited the display of paternal behavior in males of rodents, it has been shown that in some species high testosterone levels are needed for exhibition of ...

journal_title：Revista de biologia tropical

authors： Luis J,Ramírez L,Carmona A,Ortiz G,Delgado J,Cárdenas R

更新日期：2009-03-01 00:00:00

abstract：:Seed production, seed dispersal and recruitment are critical processes in population dynamics, because they are almost never completely successful. We recorded the recruitment dynamics for the population of Dipteryx oleifera in a tropical rainforest in eastern Nicaragua (12 degrees 05' N., 83 degrees 55' W.) from Marc...

journal_title：Revista de biologia tropical

authors： Ruiz J,Boucher DH,Ruiz-Moreno D,Ingram-Flóres C

更新日期：2009-03-01 00:00:00

abstract：:The Menidia humboldtiana silverside is considered one of the most important species in fisheries in some states of Mexico. Knowing the choice that this species exercises over its food gives us an understanding of the behavior of zooplankton in presence of zooplanktonic fish, and tells us if the silverside choose among...

journal_title：Revista de biologia tropical

authors： Merino RS,Benítez MY,Estrada AM

更新日期：2009-03-01 00:00:00

abstract：:Age and growth parameters were estimated for bigeye tuna Thunnus obesus Lowe, 1839 sampled from China longline fisheries in the central Atlantic Ocean from October 2002 to July 2003 and from August 2004 to March 2005. The von Bertalanffy growth parameters were estimated at L(infinity)=217.9 cm fork length, k=0.23 year...

journal_title：Revista de biologia tropical

authors： Zhu G,Xu L,Zhou Y,Chen X

更新日期：2009-03-01 00:00:00

abstract：:A great extension (615,000 ha) of native savannas of the eastern plains of Venezuela have been replaced by plantations of Pinus caribaea var. hondurensis; however, only scarce information exists about the impact of this land use on carbon dynamics in soils. We studied the effect of temporal variability and the substit...

journal_title：Revista de biologia tropical

authors： Gómez Y,Paolini J,Hernández RM

更新日期：2008-12-01 00:00:00

abstract：:Estimating feline abundance becomes particularly difficult, sometimes impossible, due to their elusive behavior and extensive space requirements. Available techniques are expensive and/or poorly efficient, therefore alternative methods are needed. The objective of this study was to assess the possibility of identifyin...

journal_title：Revista de biologia tropical

authors： Isasi-Catalá E,Barreto GR

更新日期：2008-12-01 00:00:00

abstract：:The composition of demersal fish along the western coast of the State of Baja California Sur, Mexico, including the limit of the northern distribution of the ichthyofauna of the eastern tropical Pacific, is presented. The survey was carried out on four oceanographic cruises between autumn 2004 and March 2006. Of 220 s...

journal_title：Revista de biologia tropical

authors： Rodríguez-Romero J,Palacios-Salgado DS,López-Martínez J,Hernández-Vázquez S,Ponce-Díaz G

更新日期：2008-12-01 00:00:00

abstract：:Brycon henni, is a native fish from Western Colombia is important as food and in sport fishing, and could be cultured in waters between 18 and 28 degrees C. A previous cytogenetic study in branchial cells indicated different chromosomal complements. Total blood samples were seeded in 4 ml Ham-F12 culture medium, suppl...

journal_title：Revista de biologia tropical

authors： López DD,Vásquez Palacio G,Ruiz Cortés T,Olivera Angel M

更新日期：2008-12-01 00:00:00

abstract：:Captivity represents an extreme situation for primates, especially for those with large home ranges, and its effect on their behavior might be considerable. The Wedge-capped Capuchin Monkey Cebus olivaceus is the most common primate in Venezuelan zoos. To estimate the effect of confinement on C. olivaceus behavior, we...

journal_title：Revista de biologia tropical

authors： López MC,Zaida T

更新日期：2008-09-01 00:00:00

abstract：:The structural and ultrastructural features of gonads from endemic Mexican fish have received scarce attention. This study describes the histological and ultrastructural characteristics of oocyte from Chirostoma humboldtianum. The ovary is asynchronic, and as such, most phases of oocyte development are found in the sa...

journal_title：Revista de biologia tropical

authors： Cárdenas R,Chávez M,González JL,Aley P,Espinosa J,Jiménez-García LF

更新日期：2008-09-01 00:00:00

abstract：:During October and November 1998 (rainy season), and December, February and March 1999 (dry season), larvae distribution of Petrolisthes armatus and associated decapods were sampled in three different sites at the Punta Morales peninsula, Gulf of Nicoya, Costa Rica. A total of 6014 decapod larvae were collected, and 7...

journal_title：Revista de biologia tropical

authors： Díaz-Ferguson E,Arroyo D,Morales A,Vargas JA

更新日期：2008-09-01 00:00:00

abstract：:Because of their slow growth, shade-tolerant species remain exposed to foliar damage long before reproductive age. Foliar damage can be controlled through synchronous leaf production and specialized phytochemical strategies. In this study, the dynamics of foliar damage in different cohorts of seedlings were evaluated ...

journal_title：Revista de biologia tropical

authors： Ramos C,García MR

更新日期：2008-09-01 00:00:00

abstract：:Age and growth of Nile tilapia (Oreochromis niloticus) were determined using 1039 specimens collected in a tropical shallow lake of Mexico, from January to December 1993. Standard length of females ranged from 9.0 to 16.5 cm and males from 8.9 to 14.8 cm. The standard length-weight relationships for all individuals wa...

journal_title：Revista de biologia tropical

authors： Gómez-Márquez JL,Peña-Mendoza B,Salgado-Ugarte IH,José Luis AF

更新日期：2008-06-01 00:00:00

abstract：:The structure of the community of moss springtails on oak and fir bark in the forests at the NW slope of Iztaccihuatl Volcano, State of Mexico, is analyzed. The study included four samplings (November 2003, March-June-August 2004), carried out in three altitudes I: 2750 m, II: 2 930 and 3 250 m a.s.l. Calculated index...

journal_title：Revista de biologia tropical

authors： Cutz-Pool LQ,Palacios-Vargas JG,Castaño-Meneses G

更新日期：2008-06-01 00:00:00

abstract：:Migrating humpback whales from northern and southern feeding grounds come to the tropical waters near Osa Peninsula, Pacific of Costa Rica, to reproduce and raise their calves. Planning effective marine protected areas that encompass humpback critical habitats require data about which oceanographic features influence ...

journal_title：Revista de biologia tropical

authors： Oviedo L,Solís M

更新日期：2008-06-01 00:00:00

abstract：:The aim of this work was to analyze histologically and histometrically the sublingual gland of mice infected with the RAL strain of T. cruzi, according to the sex. Swiss mice (Mus musculus) were inoculated with 2 x 10(4) blood trypomastigotes of the RAL strain of T. cruzi. In the peak of the parasitemia (12th day) the...

journal_title：Revista de biologia tropical

authors： de Albuquerque S,Lopes RA,Sala MA,Abrahão AA,Rosa DR

更新日期：2008-06-01 00:00:00

abstract：:Richness and abundance of birds in riparian forest belts of varied breadths at the Sesesmiles river microwatershed, Copan, Honduras. Riparian forests protect many species of plants and animals. We studied bird communities in riparian forest belts of the Sesesmiles river microwatershed, Copan, Honduras (140 degrees 43'...

journal_title：Revista de biologia tropical

authors： Arcos IT,Jiménez F,Harvey CA,Casanoves F

更新日期：2008-03-01 00:00:00