Abstract：
:Some dinoflagellates with benthic habits are related to ciguatera intoxication by fish consumption, especially in tropical areas. In the Mexican Caribbean, ciguatera is relatively common, but only one paper seems to have been published on the subject, and there are very few publicactions on phytoplankton and benthic microalgae. Material collected along the coast of the State of Quintana Roo with phytoplankton net (54 mm) and directly from sediment and epiphytes of macroscopic plants, was searched for toxic and other associated dinoflagellates. Samples were studied by light and scanning electron microscopy. Morphological characters were useful for species identification, but eventually physiological, ecological and molecular characters could also be used. Three species of Gambierdiscus, related to the production of ciguatera toxins, were identified: G. belizeanus, G. toxicus and G. yasumotoi. They are distributed in shallow coastal areas, including coastal lagoons.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Hernández-Becerril DU,Almazán Becerril Asubject
Has Abstractpub_date
2004-09-01 00:00:00pages
77-87eissn
0034-7744issn
2215-2075journal_volume
52 Suppl 1pub_type
杂志文章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
pub_type： 杂志文章
doi：
更新日期：2008-12-01 00:00:00
abstract：:We observed the mating behavior of the neck-banded snake Scaphiodontophis annulatus (a common species of colubrid in the South Pacific of Costa Rica) in the pre-montane wet forest of Las Cruces Biological Station (San Vito de Java, Costa Rica). Three S. annulatus were observed during courtship between 10-12 AM in a pa...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v54i2.13940
更新日期：2006-06-01 00:00:00
abstract：:A comparative study was performed between the isozymes 1 and 2b of the L-amino acid oxidase (E.C. 1.4.3.2) from the venom of Bothrops asper snakes captured in Costa Rica. The amino acid composition differs slightly: L-amino acid oxidase-1 (thn most anodal) shows more aspartic and glutamic acid residues than L-amino ac...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1982-07-01 00:00:00
abstract：:Simplification of natural habitats leads to a modification of the community associated with a host plant. Pequi trees (Caryocar brasiliense) are common to find in central Brazil, especially in the middle of monocultures, such as soy, corn, pasturelands or Eucalyptus plantations. On this scenario we hypothesized that h...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v60i3.1758
更新日期：2012-09-01 00:00:00
abstract：:The fish and invertebrates community structure in the Sabancuy estuary was analyzed in two seasons and 14 sampling stations (13 along the estuary and one in the marine adjacent coast). No significant differences were found between seasons. The environmental frame defines two zones within the estuary, the first extends...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2001-03-01 00:00:00
abstract：:The reproductive season of tilapia was studied by monthly samplings at Emiliano Zapata dam, Morelos State, Mexico. From February 1999 through February 2000 a sample of 50 fish was taken from the commercial catch (castnet, 6.5 cm of mesh size). The observed sex ratio was 1:1.29 (females:males) (chi(2)=10.26; p<0.05). T...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v53i3-4.14666
更新日期：2005-09-01 00:00:00
abstract：:Pine plantations in the tropics are often employed to recondition eroded slopes from mudslides, as the Pinus caribaea plantation that shields the Universidad Simón Bolívar campus in Caracas (Venezuela). However, mismanagement of this plantation has led to its rapid degradation. The best option to maintain the protecti...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v64i2.19632
更新日期：2016-06-01 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
pub_type： 杂志文章
doi：
更新日期：2010-09-01 00:00:00
abstract：:The host plants of Cerambycidae (Coleoptera) in the Province of Espinal (Chaquenian Dominion) and the province of Buenos Aires are mainly exotics, cultivated or naturalized, the last ones growing spontaneously and forming little forests. Forty two species of Cerambycidae are reported using these plants and other nativ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1997-03-01 00:00:00
abstract：:Recognition of the potentially harmful effects of water development in the tropics had led to increasing efforts to assess the environmental impact of such projects prior to construction. Decisions regarding the development or non-development of water resources must be based on sound investigation of both the long-and...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：1976-06-01 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
pub_type： 杂志文章
doi：
更新日期：2008-09-01 00:00:00
abstract：:Specimens of the characid Brycinus nurse (N = 980) were collected in Asa reservoir, Nigeria, from November 1991 to October 1993. The diet was analyzed from stomach contents using the frequency of occurrence, numerical and gravimetric methods. Fish sex affected occurrence, number and weight of food items. The relative ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2002-03-01 00:00:00
abstract：:The information on ecological behavior of wild sloths is very scarce. In this study we determined the home ranges and resources used by three adult female three-toed sloths (Bradypus variegatus) and their four young in an agricultural matrix of cacao (Theobroma cacao), pasture, riparian forests and living fencerows in...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2011-12-01 00:00:00
abstract：:There is great concern about the effect of climate change in arid and subarid areas of the tropics. Climate change combined with other anthropogenic activities such as deforestation, fires and over-grazing can accelerate their degradation and, consequently, the increases in losses of biological and economic productivi...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2011-09-01 00:00:00
abstract：:The spatial distribution of individuals is a fundamental property of most species and constitutes essential information for the development of restoration and conservation strategies, especially for endangered plant species. In this paper we describe the spatial distribution of different size classes of the endangered...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v61i3.11981
更新日期：2013-09-01 00:00:00
abstract：:A new species of green, prehensile-tailed pitviper of the genus Bothriechis is described from the Atlantic slopes of eastern Guatemala and western Honduras. This species appears to be most closely related to B. bicolor of the Pacific versant of Chiapas (Mexico) and Guatemala. Several other species of Bothriechis occur...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2000-12-01 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
pub_type： 杂志文章
doi：10.15517/rbt.v56i2.5630
更新日期：2008-06-01 00:00:00
abstract：:Seed dispersal is a fundamental process in plant ecology and is of critical importance for the restoration of tropical communities. The lands of the Cabo Rojo National Wildlife Refuge (CRNWR), formerly under agriculture, were abandoned in the 1970s and colonized mainly by non-native tree species of degraded pastures. ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2014-09-01 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
pub_type： 杂志文章
doi：
更新日期：2010-12-01 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
pub_type： 杂志文章
doi：
更新日期：2010-06-01 00:00:00
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
pub_type： 杂志文章
doi：
更新日期：2011-03-01 00:00:00
abstract：:Community structure and composition are dictated by evolutionary and ecological assembly processes which are manifested in signals of, species diversity, species abundance and species relatedness. Analysis of species coexisting relatedness, has received attention as a tool to identify the processes that influence the ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v64i3.18806
更新日期：2016-09-01 00:00:00
abstract：:A new species of Hyalinobatrachium of the fleischmanni group, H. mondolfii, is described from the Orinoco delta floodplains in Venezuela. This new species can be distinguished from other congeners by the following combination of characters: parietal peritoneum clear, pericardium white, visceral and hepatic peritoneum ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2001-09-01 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
pub_type： 杂志文章
doi：10.15517/rbt.v57i1-2.11324
更新日期：2009-03-01 00:00:00
abstract：:The diet ofa neotropical fish species (Creagrutus bolivari) was studied using different methods: the Cortés 1997 graphic method and two relative importance indexes, one designed by George and Hadley in 1979 (% RIi) and another proposed by Cortés in 1997 (% IRIi). Only discrete prey (aquatic and terrestrial invertebrat...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2006-12-01 00:00:00
abstract：:This is the fourth and last contribution describing the individual structure, distribution and conservation status of coral reefs in the Province of Bocas del Toro. Here we describe 14 new reefs along 129 km of coast from Peninsula Valiente to Río Calovébora. Average live coral coverage for this region was 17.1% (+/- ...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2001-03-01 00:00:00
abstract：:The Furnariidae encompasses 293 species and has been recognized as an example of continental adaptive radiation. They inhabit biomes from deserts to humid forests at all strata and show morphological heterogeneity unparalleled among birds at any taxonomic level. Sclerurus is a uniform genus of cryptic, mainly dark bro...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v64i3.21094
更新日期：2016-09-01 00:00:00
abstract：:Jaguars (Panthera onca) are the largest predator in lowland forests of Amazonia but there have been few studies on their occurrence and activity in such forests. Here, we used camera traps to document the occurrence and activity of jaguars within a local area (-650ha) of lowland forest of Eastern Ecuador, over two sam...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：10.15517/rbt.v62i2.11115
更新日期：2014-06-01 00:00:00
abstract：:We examined the protoplasmic assimilation of columnar cacti pollen grains in two species of Venezuelan desert glosophagine bats, Glossophaga longirostris and Leptonycteris curasoae, by determining the amount of empty (digested) pollen grains found in their fecal samples. To determine the amount of empty pollen grains,...
journal_title：Revista de biologia tropical
pub_type： 杂志文章
doi：
更新日期：2005-03-01 00:00:00
abstract：:Critical evaluation of terminology use in ecology is important to avoid using jargon that helps little to facilitate communication. Here we reply to Monge-Najera’s comment on the use of the terms ensemble and assemblage, we argue for the use of the words ensamble and ensamblaje in Spanish. In addition, both terms have...
journal_title：Revista de biologia tropical
pub_type： 评论,信件
doi：
更新日期：2016-06-01 00:00:00
