Abstract:
:A study of the 1963-1965 eruptions of the Irazú volcano (Costa Rica) showed that the ashes altered the ecological conditions of a great number of insects. Experiments suggest a mechanical action of the abrasive particles on the epicuticle, making it permeable, and thus accelerating dehydration. Other insects, such as the honey bee (Apis mellifera), were not affected externally but through the ingestion of ash-contaminated nectar and by the massive destruction of the vegetation on which they depended. Great destruction of bee populations was observed during 1964 and 1965-66 in the San José area. On the other hand, the volcanic ash apparently favored other insects, especially those protected by a waxy secretion, and by the possible elimination of their natural enemies, to such proportions that they became pests of economic significance.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Wille A,Fuentes Gsubject
Has Abstractpub_date
1975-12-01 00:00:00pages
165-75issue
2eissn
0034-7744issn
2215-2075journal_volume
23pub_type
杂志文章abstract::Abstract: Attacks by big cats on livestock are one of the major causes of human-felid conflicts and, therefore, an important factor in the conservation of these species. It has been argued that a reduction in natural prey abundance promotes attacks on domestic species, but few studies have tested this statement, and s...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v62i4.13199
更新日期:2014-12-01 00:00:00
abstract::Abstract: Histology of gill, liver and kidney in juvenile fish Colossoma macropomum exposed to three temperatures. Water temperature is an important factor that affects growth and antioxidant enzyme activities in fish, and when adverse, it may trigger diseases in fish populations. C. macropomum is a freshwater neotrop...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2013-06-01 00:00:00
abstract::A monovalent antivenom was produced by immunizing two horses with venom of the pit viper Bothrops asper (Ophidia: Viperidae). Although development of the immune response against four toxic and enzymatic activities of the venom was similar in both horses during the first two thirds of the immunization schedule, antibod...
journal_title:Revista de biologia tropical
pub_type: 杂志文章,评审
doi:
更新日期:1988-11-01 00:00:00
abstract::Anisotremus interruptus is a widely distributed and commercially important species in the Eastern Pacific. A multi-year research on the reproduction of this species was carried out in coastal waters of Jalisco, Mexico. For this purpose, monthly samples were gathered with gillnets of different mesh sizes from 1998-2008...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2012-06-01 00:00:00
abstract::The Cuban archipelago has 79 Phyllophaga species with a 98.6 % of endemism, which makes the group ecologically and economically important, as some species are classified as crop pests. The aim of this study was to determine the relationship between the composition and structure of the Phyllophaga assemblages with thei...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v65i1.23286
更新日期:2017-03-01 00:00:00
abstract::The study presents an interactive descriptive tool (MONRATE) for calculating and predicting reinfection rates and time of Ascaris lumbricoides following mass chemotherapy. The implementation was based on the theoretical equation published by Hayashi in 1977, for time-prevalence: Y=G [1-(1-X)(N-R)] as modified by Jong-...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v55i3-4.5951
更新日期:2007-09-01 00:00:00
abstract::It is located 650m above sea level along the boundary between the North Caribbean and Pacific slopes, near the Southern end of the volcanic Guanacaste mountain range. In the early 1980s the lake's main outlet was dammed and the outflow was diverted into Arenal Reservoir. Lake Cote was first studied in 1990-1991, and l...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2014-06-01 00:00:00
abstract::Egg clutches of the centrolenid Hyalinobatrachium pulveratum were sampled in four lowland locations of Costa Rica. The ontogenesis of the tadpoles of this species is documented by periodical descriptions of the larval stages. Larvae of H. pulveratum change their shape during development because of the non-equal growth...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v52i1.14912
更新日期:2004-03-01 00:00:00
abstract::Onychophora have undergone a new wave of taxonomic revisions in the last three years. After a recent revision, only two species of Macroperipatus are registered from Brazil: Macroperipatus ohausi and Macroperipatus geayi. The former was only the second species of Onychophora to be described from Brazil, and is herein ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2014-09-01 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 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::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::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::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
pub_type: 杂志文章
doi:
更新日期:2009-12-01 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
pub_type: 杂志文章
doi:10.15517/rbt.v58i1.5197
更新日期:2010-03-01 00:00:00
abstract::Lichenized fungi or lichens are organisms that have been little studied in the tropics and which distribution is affected by microenvironmental factors and substrate characteristics. The present study aimed to identify phorophyte specificity and microenvironmental preferences of corticolous lichens in five phorophyte ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2012-06-01 00:00:00
abstract::The queen conch Eustrombus gigas is an important fisheries resource in the Caribbean region. In Cuba Island the studies about this resource are very scarce and particularly in the Southeastern regions of the country. With the aim to get important fishery information about this gastropod, adult Queen Conch density and ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v61i2.11165
更新日期:2013-06-01 00:00:00
abstract::Daily emergence of mayflies in Neotropical rivers and their causes have been poorly studied. In temperate zones, this process is better known and attributed to several factors. In this work, we studied the daily emergence of subimagines of several Ephemeroptera genera in La Picón River of a Venezuelan Andean cloud for...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i1.17919
更新日期:2016-03-01 00:00:00
abstract::Although the genus Blechnum has been largely studied, problems of species characterization, nomenclature, classification and taxonomy remain unsolved. For these reasons, in this study we intend to deepen in the characterization of the arborescent group of Blechnum with a review of eight species: B. brasiliense, B. col...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2013-03-01 00:00:00
abstract::Parasites play a crucial role in the ecology of animals. They also appear to be important in mechanisms underlying sexual selection processes. In this article we study the prevalence, effect and potential role in sexual selection of the protozoon Trypanosoma evansi in capybaras, Hydrochoerus hydrochaeris. We collected...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i3.20110
更新日期:2017-03-01 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
pub_type: 杂志文章
doi:
更新日期:2008-12-01 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::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
pub_type: 杂志文章
doi:
更新日期:2008-09-01 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
pub_type: 杂志文章
doi:
更新日期:2008-12-01 00:00:00
abstract::Although Costa Rica has been biologically well studied, few areas have complete mammal inventories, which are essential for ecological studies and conservation. The San Vito region is considered among the most important for scientific research in the country because of the presence of the Wilson Botanical Garden and L...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2006-03-01 00:00:00
abstract::Production and condition index of a turkeywing (Arca zebra) population were studied from August 1984 to August 1985 in Pariche, Cariaco Gulf, Venezuela. Production was studied through bimonthly collections using a method designed for populations with continuous reproduction and indistinguishable age classes. The popul...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2001-06-01 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::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::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
pub_type: 杂志文章
doi:
更新日期:2008-06-01 00:00:00
abstract::Lichens are increasingly used worldwide as air quality biomonitors because they are efficient, easy and cheap, but validation studies of the methodology are scarce. Three foliose lichen biomonitoring methods were compared by field tests (in the tropical urban habitat of San José, Costa Rica) and laboratory simulations...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2002-03-01 00:00:00