Abstract:
:Punta Lara Natural Reserve shelters the relict of the Southernmost riparian forest in the world, where the flora is threatened by the anthropic expansion and by the introduction of exotic species. In this area the ferns and lycophytes grow in particular environments as marshland, grassland and marginal forest. The aim of this work was to evaluate the diversity of ferns and lycophytes that inhabit in Punta Lara Natural Reserve. Field trips were conducted from 2006 to 2009 and local herbaria and specific bibliography were also revised. As a result of our study twenty four taxa of ferns and lycophytes were recognized. Their habit was mainly terrestrial (70%), fewer aquatic (17%) and epiphytic (13%). Five native taxa were scarcely recorded whereas two native species previously documented were not found. We assume that the main threats on ferns and lycophytes populations in Punta Lara Reserve are: removal for comercialization, invasion by exotic species and climatic fluctuations (drought periods). Keys for taxa identification are given and strategies for the conservation of threatened taxa are proposed.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Giudice GE,Ramos Giacosa JP,Luján Luna M,Yañez A,de la Sota ERsubject
Has Abstractpub_date
2011-09-01 00:00:00pages
1037-46issue
3eissn
0034-7744issn
2215-2075journal_volume
59pub_type
杂志文章abstract::A great extension (615,000 ha) of native savannas of the eastern plains of Venezuela have been replaced by plantations of Pinus caribaea var.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
pub_type: 杂志文章
doi:
更新日期:2008-12-01 00:00:00
abstract::Life history and recruitment information of tropical trees in natural populations is scarce even for important commercial species. This study focused on a widely exploited Neotropical canopy species, Pachira quinata (Malvaceae), at the southernmost, wettest limit of its natural distribution, in the Colombian Amazonia....
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2011-06-01 00:00:00
abstract::The semi-arid Caatinga is the fourth largest biome of Brazil, which biota still remains one of the most poorly known, especially with regard to invertebrate groups. In this study, a ground-foraging ant assemblage was surveyed during one year and the effect of rainfall on pitfall trapping was assessed. The study was pe...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v59i4.3426
更新日期:2011-12-01 00:00:00
abstract::Lime juice killed millions of Vibrio cholerae O1, El Tor, Inaba, present on cabbage and lettuce contaminated in the laboratory. The lethal effect was evident within 5 min of exposure to lime juice. No vibrios could be recovered at dilution 1:10 using alkaline peptone water (APW) and thiosulfate-citrate-bile salts-sacc...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1994-12-01 00:00:00
abstract::J. curcas has been studied in different countries and some interesting agronomic, pharmacological and industrial properties have been reported. More recently, it has been considered an important alternative source for biofuel production. The objective of this study was to establish a long-term method for the maintenan...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2013-09-01 00:00:00
abstract::155 specimens of mussels (Modiolus capax) were gathered during March 1993 in a subtidal bed, located in northern Ocotal, Guanacaste, Costa Rica. For each individual in the random sample, shell length, breadth and height were measured and total weight, shell weight empty and meat weight were controlled. Analysis of dat...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1995-04-01 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
pub_type: 杂志文章
doi:10.15517/rbt.v59i1.3200
更新日期:2011-03-01 00:00:00
abstract::The karyotypes of the purple snails Plicopurpura pansa (Gould, 1853) and P. columellaris (Lamarck, 1816) were established from 17 and 13 adults, respectively; and from eight capsules with embryos of P. pansa. In P. pansa were counted 59 mitotic fields in the adults and 127 in embryos; and 118 fields in P columellaris....
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2007-09-01 00:00:00
abstract::In recent years, the use of new scientific techniques has effectively improved aquaculture production processes. Astaxanthin has various properties in aquaculture and its antioxidant benefits have been closely related to stress resistance; besides, it is an essential factor for growth in many crustaceans and fish. The...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v62i4.13057
更新日期:2014-12-01 00:00:00
abstract::An in vivo model to study the antimalaric effect of plant extracts is described. White mice (25-30 g body weight) are treated subcutaneously with 0.6 ml of the diluted extract starting seven days before P. berghei infection; treatment continues until death or for 30 days. Simultaneously 0.2 ml of the extract are appli...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1998-03-01 00:00:00
abstract::Schistosomiasis remains a disease of major global public health concern since it is a chronic and debilitating illness. The widely distributed Schistosoma mansoni that causes intestinal schistosomiasis represents a great threat. Its world-wide distribution is permitted by the broad geographic range of the susceptible ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i4.21668
更新日期:2016-12-01 00:00:00
abstract::Occurrence of the bacterium Helicobacter pylori was compared for two Costa Rican sites with contrasting levels of gastric cancer incidence, Poás (incidence 15.13%) and Puriscal (83.53%). A sample of 185 adults of similar age and sex proportions was studied in each site, using both H. pylori antiserum tests and gastros...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1998-09-01 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
pub_type: 杂志文章
doi:
更新日期:2009-03-01 00:00:00
abstract::During the first six months of 1970 we collected 16 lots of the bivalve Anadara tuberculosa from two areas within the Gulf of Nicoya, Costa Rica. These were examined bacteriologically and the coliform levels found in all of them were such that they had to be graded as not satisfactory for human consumption, according ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1977-07-01 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::To demonstrate that T. lewisi infection increases T. gondii multiplication in white rats, groups of five Wistar or Sprague Dawley rats were inoculated with 10(6) T. lewisi trypomastigotes and four or seven days later infected with Toxoplasma tachyzoites. Host survival time was monitored, and the presence of T. gondii ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1997-06-01 00:00:00
abstract::The aquatic gastropod mollusc, Pyrgophorus coronatus, may perform an important role in the transmission of an emergent ocular pathology among fishes in Lake Apoyo, Nicaragua. This disease emerged after an introduction of tilapia (Oreochromis niloticus) and the subsequent loss of Chara sp. beds in the lake. We compared...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v56i1.5511
更新日期:2008-03-01 00:00:00
abstract::Plant regeneration from seven-week-old callus cultures derived from mature embryos of several indica rice cultivars was achieved with frequencies of morphogenic calli from 10 to 47%. Three media were tested both for callogenesis and plant regeneration. For 3 of the 7 genotypes examined, the best combination of media f...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1997-03-01 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::Blood inoculation in mice showed that Toxoplasma organisms circulate in blood after 1 h of oocyst infection. Parasites were detected up to 15 days later and then disappeared from the bloodstream concomitantly with cyst formation in the brain, probably due to antibody presence. Immunosuppression caused by cortisone ace...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1993-08-01 00:00:00
abstract::The nests used in this study were obtained from trap-nests (tubes of cardboard and cut bamboo stems) placed on Santa Carlota Farm (Itaoca Section-IS, Santana Section-SS and Cerrado-Ce), Cajuru, SP, Brazil. The number of nests and corresponding species obtained were as follows: 516 nests of T. curvitarsis, 104 of T. ru...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2005-03-01 00:00:00
abstract::Starch gel electrophoresis was used to analyze the allelic variability of four polymorphic loci (Lap-2, Lap-3, Pgm and Gpi) from a single population of Artemia franciscana (Kellogg, 1906) from the Great Salt Lake (Utah, USA), cultured under eight different experimental conditions. The organisms were cultured to the ad...
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 genus Helcogrammoides comprises three species of small, cryptic shorefishes, H. antarcticus, H. chilensis, and H. cunninghami. All three species inhabit shallow water along exposed rocky coasts. Specimens reported herein extend the known distributions of H. chilensis and H. cunninghami to the vicinity of Lima, Per...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2001-07-01 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
pub_type: 杂志文章
doi:
更新日期:2008-06-01 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
pub_type: 杂志文章
doi:10.15517/rbt.v57i3.5481
更新日期:2009-09-01 00:00:00
abstract::Panulirus gracilis is a high valuable lobster species with considerable captures along the tropical Pacific coast. In this study, I present some biological and fishery parameters described after a sample of 843 lobsters, landed in Playa Lagarto from November 2007 to October 2008. From landing records, a total of 74.9%...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2011-06-01 00:00:00
abstract::We studied the composition and seasonal variation of the diet of the capybara (Hydrochaeris hydrochaeris) in the flooded savannas of Caño Limón, Colombia. This was achieved by direct observation of the consumption patterns of these animals. The capybaras only consumed plants, and their diet included 89 species of 22 f...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2003-06-01 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::A conductivity staining method for tissue samples were developed using a solution of 10 ml of 5% carbolic acid solution, 2 g of tannic acid, and 10 ml of saturated aluminium sulfate 12-hydrated after fixation with osmium. Specimens of kidney (mouse) with the above treatment can be analyzed under a scanning electron mi...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1994-08-01 00:00:00
abstract::Raptorial birds harbor a variety of ectoparasites and the mayority of them are host specific. The aim of this study was to identify the ectoparasites of captive birds of prey from Mexico, as well as to verify their impact in the health of infested birds. Raptorial birds were confiscated and kept in captivity at the Ce...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2011-09-01 00:00:00