Browsing Biología by Title
Now showing items 768-787 of 851
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Tadpole begging reveals high quality
(2017)Parents can benefit from allocating limited resources non randomly among offspring, and offspring solicitation (i.e. begging) is often hypothesized to evolve because it contains information valuable to choosy parents. We ... -
Taxonomical and functional diversity of Saprolegniales in Anzali lagoon, Iran
(2020)Studies on the diversity, distribution and ecological role of Saprolegniales (Oomycota) in freshwater ecosystems are currently receiving attention due to a greater understanding of their role in carbon cycling in various ... -
The clerodane diterpene casearin J induces apoptosis of T-ALL cells through SERCA inhibition, oxidative stress, and interference with Notch1 signaling
(2016-01-28)T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematologic malignancy that preferentially affects children and adolescents. Over 50% of human T-ALLs possess activating mutations of Notch1. The clerodane ... -
The contrasting roles of aquatic fungi and oomycetes in the degradation and transformation of polymeric organic matter
(2019)Studies on the ecological role of fungi and, to a lesser extent, oomycetes, are receiving increasing attention, mainly due to their participation in the cycling of organic matter in aquatic ecosystems. To unravel their ... -
The countries and languages that dominate biological research at the beginning of the 21st century
(Revista de Biolología Tropical 53 (1-2): 283-294, 2005, 2005)Traditionally, studies of scientific productivity are biased in two ways: they are based on Current Contents, an index centered in British and American journals, and they seldom correct for population size, ... -
The deepwater fishery along the Pacific coast of Costa Rica, Central America
(Lat. Am. J. Aquat. Res., 37(3): 543-554, 2009, 2009)Global catches of marine fishery resources declined during the last decades; however, there has been a trend of increasing exploitation of deepwater resources that are especially vulnerable to depletion. Such a tendency ... -
The dystrophinopathies in Costa Rica
(Rev Biol Trop 52(3), 2004, 2004)A five-years long study aiming to describe the basic genetic epidemiology of the dystrophinopathies in Costa Rica recruited 31 patients with clinical symptoms of DMD/BMD at the National Children’s Hospital (HNN). This ... -
The effect of biogeographic and phylogeographic barriers on gene flow in the brown smoothhound shark, Mustelus henlei, in the northeastern Pacific
(2015)We assessed the effects of the prominent biogeographic (Point Conception and the Peninsula of Baja California) and phylogeographic barriers (Los Angeles Region) of the northeastern Pacific on the population connectivity ... -
The genus Alwisia (Myxomycetes) revalidated, with two species new to science
(2014)Based on morphological investigations and a phylogeny constructed with partial sequences of the SSU rDNA gene, we revalidate the genus Alwisia and propose the combination Alwisia bombarda Berk. & Broome to be used ... -
The hub as a launching platform: rapid movements of the spider Leucauge mariana (Araneae: Tetragnathidae) as it turns to attack prey
(The Journal of Arachnology arac-39-01-13.3d 22/12/10 13:25:38 1 Cust # Hi10-76, 2011)Spiders are effectively blind with respect to the lines in their webs, and they commonly use exploratory leg movements to find lines, just as a blind man finds objects using a cane. Nevertheless, a mature female Leucauge ... -
The importance of group vocal behaviour in roost finding
(2018)Individuals benefit from socially acquired information to avoid predation risks and enhance foraging efficiency. Spix's disc-winged bats, Thyroptera tricolor, form very stable social groups despite their need to find a new ... -
The larva of Perissolestes remotus (Williamson & Williamson, 1924) (Zygoptera: Perilestidae)
(2018)The larva of Perissolestes remotus is described for the first time based on Costa Rican specimens collected in forested streams with abundant organic matter. It is characterized by a slender, elongated body, with lateral ... -
The management of Typha domingensis (Typhaceae) affects macroinvertebrate assemblages in the Palo Verde Wetland, Guanacaste, Costa Rica
(2017)The Palo Verde wetland, one of the most important places for aquatic organisms in Costa Rica, is currently recovering from an invasive expansion of Typha domingensis (cattail). A monitoring program was designed to understand ... -
The neotropical damselfly genus Cora: new larval descriptions and a comparative analysis of larvae of known species (Odonata: Polythoridae)
(2011)The final larval stadium of four species of Cora are described and compared with known species in the genus. Cora skinneri Calvert, 1907, C. semiopaca Selys, 1878 and C. lugubris Navás, 1934 are described and illustrated ... -
The Neutrophil-Lymphocyte Ratio is an Independent Prognostic Factor for Overall Survival in Hispanic Patients with Gastric Adenocarcinoma
(2018-07-13)Introduction High values of neutrophil-lymphocyte ratio (NLR) and platelet-lymphocyte ratio (PLR) are related with poor prognosis in patients with gastric cancer. However, this association has been rarely assessed in ... -
The New Refugium Botanicum. Guarianthe skinneri
(2017)Guarianthe skinneri (Bateman) Dressler & W.E.Higgins, Lankesteriana 7:38 (2003). Basionym: Cattleya skinneri Bateman, Orchid. Mex. Guat. 1839. Type: Habitat in Guatemala, G. Skinner s.n. (holotype, K). Epiphytic, ... -
The new Refugium Botanicum. Maxillariella (Maxillaria) tenuifolia
(2017)Maxillariella tenuifolia (Lindl.) M.A. Blanco & Carnevali, Lankesteriana 7(3): 530. 2007. Basionym: Maxillaria tenuifolia Lindl., Edwards’s Botanical Register 23: sub. t. 1986. 1837. Type: “a native of ... -
The New Refugium Botanicum. Phragmipedium schlimii f. manzurii
(2019-03)Phragmipedium schlimii f. manzurii (W.E.Higgins and P.Viveros) Braem and Tesón, Richardiana 16:305. 2016. Phragmipedium manzurii W.E.Higgins and P.Viveros, Lankesteriana 8(3):89. 2008. Phragmipedium schlimii var. ...