Abstract:
:The endangered species Strombus gigas is a marine gastropod of significant economic importance through the Greater Caribbean region. In contrast to phenotypic plasticity, the role of genetics on shell variations in S. gigas has not been addressed so far, despite its importance in evolution, management and conservation of this species. This work used geometric morphometrics to investigate the phenotypic variation of 219 shells of S. gigas from eight sites of the Colombian Southwest Caribbean. Differences in mean size between sexes and among sites were contrasted by analysis of variance. Allometry was tested by multivariate regression and the hypothesis of common slope was contrasted by covariance multivariate analysis. Differences in the shell shape among sites were analyzed by principal component analysis. Sexual size dimorphism was not significant, whereas sexual shape dimorphism was significant and variable across sites. Differences in the shell shape among sites were concordant with genetic differences based on microsatellite data, supporting its genetic background. Besides, differences in the shell shape between populations genetically similar suggest a role of phenotypic plasticity in the morphometric variation of the shell shape. These outcomes evidence the role of genetic background and phenotypic plasticity in the shell shape of S. gigas. Thus, geometric morphometrics of shell shape may constitute a complementary tool to explore the genetic diversity of this species.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Márquez EJ,Restrepo-Escobar N,Montoya-Herrera FLdoi
10.15517/rbt.v64i4.21468subject
Has Abstractpub_date
2016-12-01 00:00:00pages
1585-95issue
4eissn
0034-7744issn
2215-2075journal_volume
64pub_type
杂志文章abstract::The spatial and temporal abundance of epiphytic dinoflagellates associated with ciguatera was studied over two annual cycles (March 1999 to March 2000 and March 2001 to March 2002) in the northwestern coast of Cuba. From 14 species of macroalgae (Phaeophyta, Chlorophyta, and Rhodophyta), 1340 samples were obtained ide...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v54i2.13870
更新日期:2006-06-01 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
pub_type: 杂志文章
doi:10.15517/rbt.v58i4.5410
更新日期:2010-12-01 00:00:00
abstract::The sea urchin roe is among the highest valued seafood items in the world. Increasing demand has extended this fishery worldwide and cases of overfishing have been detected in some countries. On the eastern coast of Venezuela some species of sea urchin, such as Lytechinus variegatus, are consumed as food but studies t...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2000-12-01 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::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 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::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
pub_type: 杂志文章
doi:
更新日期:2009-12-01 00:00:00
abstract::The study of sexual reproductive behavior supported by ultrastructural evidence is important in rotifers to describe differences among potential cryptic species. In this research, the morphology of the rotifer Brachionus bidentatus is described at the ultrastructural level, using electronic microscopy, together with a...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2013-12-01 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::The leishmaniasis is a complex disease system, caused by the protozoan parasite Leishmania and transmitted to humans by the vector Lutzomyia spp. Since it is listed as a neglected disease according to the World Health Organization, the aim of this study was to determine the current and future niche of cutaneous and vi...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2016-09-01 00:00:00
abstract::The land crab Gecarcinus quadratus is an engineering species that controls nutrient cycling in tropical forests. Factors regulating their coastal distribution are not fully understood. We quantified land crab distribution during the dry season at Sirena Field Station in Corcovado National Park, Costa Rica, and found t...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v55i1.6073
更新日期:2007-03-01 00:00:00
abstract::Female resistance behavior that occurs prior to intromission does not by itself imply forced copulation. Such behavior may function instead as a test of the male in order to favor some males over others, or to induce the male to desist. Thus, male persistence and forcefullness may sometimes be better described as pers...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2002-06-01 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::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::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
pub_type: 杂志文章
doi:
更新日期:2008-03-01 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::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::An avirulent T. gondii strain isolated from a owl (Glaucidium brasilianum) produces randomly distributed cysts in the brain of mice which can survive to inocula as high as 1000 oocysts. Cysts appeared for the first time after 15 days of infection. Regarding to humoral immunity development due to our TCR-2 strain, dete...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1990-11-01 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 abundance of Anchoa mitchilli was studied in Laguna de Tamiahua, Veracruz during three annual cycles (84-85, 85-86 and 86-87). Our goal was to detect areas and seasons with high egg abundance and the possible association of such areas and seasons with covariates such as temperature, salinity, transparency, depth, ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2003-06-01 00:00:00
abstract::Limnocytherina is a genus conformed by 12 species; its distribution in the American continent is known to be exclusively on the North (neartics), but little is reported about its distribution from Mexico (transition zone) and Central America (Neotropics). Different sampling campaigns were undertaken in three crater la...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2014-03-01 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::Rhizosphere microbial communities are important for phytoremediation, plant nutrition, health and metabolism. Many factors, including plant species, pH and nutritional factors influence rhizosphere micro- biology. In this study, we analysed the effects of different forms of nitrogen on the structures of rhizosphere ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i1.18138
更新日期:2016-03-01 00:00:00
abstract::The effect of irradiation of the aqueous solution of L. m. muta venom was evaluated with thermic neutrons from Uranium-235 employing doses of 1.61 to 5.19 Gray. The venom was examined for protein content by the Folin Lowry Method modified by Stauffer; for acute toxicity by intraperitoneal route estimation in mice and ...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1994-04-01 00:00:00
abstract::Habitat modifications such as deforestation and the increase of agricultural activities, have led to uncommon faunal interactions. In Colombia, this condition have caused the secondary contact of subspecies of Ramphocelus flammigerus populations from Cauca valley and the Pacific coast; and some specimens with rumps of...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2012-03-01 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::Lacteous fat globules with their membranes from human milk and calostrum were studied by scanning and transmission electron microscopy. The first appear as spheroidal structures with some irregularities on the surface. Under the transmission electron microscope these irregularities are composed of islets from a materi...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1983-11-01 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::Marine bivalves are a very important food source for human consumption, and species that has not been of traditional use as a fishery resource are gaining interest. Seasonal variation in proximate composition, condition index and energy or caloric content of the mussel Tagelus peruvianus were studied in the Gulf of Ni...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2011-12-01 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