Now showing items 1-17 of 17

    • A Comparison of four Methods to Evaluate the Butterfly Abundance. Using a Tropical Community 

      Monge Nájera, Julián; Nielsen Muñoz, Vanessa (Journal of the Lepidopterists' Society 45(3), 1991, 241-243, 1991-03-18)
      In recent years. several transect methods to evaluate the abundance of butterflies have been proposed (Pollard, E. 1977, Biol. Conserv. 12:115—134; Feltwell, 3. 1982. Proc. Trans. Br. Entomol. Nat. Hist. Soc. 15:17—24). ...
    • Abundancia, biomasa y floración de Thalassia testudinum (Hydrocharitaceae) en el Caribe de Costa Rica 

      Nielsen Muñoz, Vanessa; Cortés Núñez, Jorge (Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 56 (Suppl. 4): 175-189, December 2008, 2008-12)
      Three Thalassia testudinumseagrass beds were studied at Cahuita National Park, from August 2003 to August 2006. Additionally, biomass samples of this species were collected at the Gandoca-Manzanillo National Wildlife Refuge, ...
    • Abundancia, biomasa y floración de Thalassia testudinum (Hydrocharitaceae) en el Parque Nacional Cahuita, Caribe de Costa Rica 

      Nielsen Muñoz, Vanessa (2007)
      Tesis publicada en: Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 56 (Suppl. 4): 175-189, December 2008. Entre agosto 2003 y agosto 2006 se estudiaron tres sitios representativos del Parque Nacional Cahuita ...
    • Análisis de la producción científica y tecnológica en Costa Rica: 2001-2011. 

      Nielsen Muñoz, Vanessa; Azofeifa Mora, Ana Beatriz (2013-09)
      El número publicaciones científicas y patentes producidas por un país se consideran predictores de potencialidades de desarrollo científico y tecnológico, es por ello que el estudio de la dinámica de la ...
    • Bryozoans 

      Nielsen Muñoz, Vanessa; Herrera Cubilla, Amalia; Cortés Núñez, Jorge (I.S. Wehrtmann, J. Cortés (eds.) Marine Biodiversity of Costa Rica, Central America. Springer., 2009)
      Sixty-one species of bryozoans have been reported in the literature from Costa Rica and are distributed as follows: Caribbean: 13 species in 11 genera, 10 families, 1 order, and 1 class; Pacific: 49 species in 41 genera, ...
    • By-catch associated with fisheries of Heterocarpus vicarius (Costa Rica) and Heterocarpus reedi (Chile) (Decapoda: Pandalidae): a six-year study (2004-2009) 

      Arana, Patricio M.; Wehrtmann, Ingo S.; Orellana, Juan Carlos; Nielsen Muñoz, Vanessa; Villalobos Rojas, Fresia (Journal of Crustacean Biology, 33(2), 198-209. 2013, 2013)
      Growing concern about the quantity and diversity of by-catch species caught in the bottom trawling nets of crustacean fisheries led us to compare the quantity of by-catch recorded in Chilean and Costa Rican deep-water ...
    • Las ciencias del mar en la Revista de Biología Tropical en su 50 aniversario 

      Cortés Núñez, Jorge; Nielsen Muñoz, Vanessa (Rev. Biol. Trop. 50(3/4): 903-907, 2002, 2002)
      El primer artículo sobre cualquier tema marino fue publicado en 1963 y desde entonces ha venido aumentando el número de publicaciones marinas hasta llegar a 637. Este número representa el 27% de todos los artículos ...
    • Costa rican international cooperative biodiversity group: using insects and other arthropods in biodiversity prospecting 

      Sittenfeld Appel, Ana; Tamayo Castillo, Giselle; Nielsen Muñoz, Vanessa; Jiménez, Allan; Hurtado Hernández, Priscilla; Chinchilla Carmona, Misael; Guerrero Bermúdez, Olga Marta; Mora, María Auxiliadora; Rojas, Miguel; Blanco, Roger; Alvarado, Eugenio; Gutiérrez, José María; Janzen, Daniel Hunt (Pharmaceutical Biology 37(Supplement):55–68. 1999, 1999)
      This paper describes the Costa Rican International Collaborative Biodiversity Group (ICBG), which was designed to introduce insects and other arthropods as a source of pharmaceutical compounds, and to generate knowledge ...
    • Does a polyphagous caterpillar have the same gut microbiota when feeding on different species of food plants? 

      Sittenfeld Appel, Ana; Uribe Lorío, Lorena; Mora López, Marielos; Nielsen Muñoz, Vanessa; Arrieta Castro, Glen; Janzen, Daniel Hunt (Revista de Biología Tropical 50(2): 547-560, 2002, 2002)
      We used classical culture techniques to explore gut bacteria and changes associated with dietary change in the highly polyphagous, tropical caterpillar Automeris zugana(Saturniidae). Fifty-five third instar wild-caught ...
    • Efecto de extractos de artrópodos sobre la multiplicación del Toxoplasma gondiidentro de macrófagos peritoneales de ratón 

      Chinchilla Carmona, Misael; Herrera Corrales, Marlen; Guerrero Bermúdez, Olga Marta; Jiménez Somarribas, Alberto; Tamayo Castillo, Giselle; Sittenfeld Appel, Ana; Nielsen Muñoz, Vanessa; Hurtado Hernández, Priscilla (Rev. Biol. Trop. 51(2): 317-320, 2003, 2003)
      Treatment of toxoplasmosis usually causes secondary effects. It is important to find active substances extracted from natural organisms. In this work we studied some arthropod extracts that have effect against Toxoplasma ...
    • Foraminifera 

      Mora Baumgartner, Claudia; Nielsen Muñoz, Vanessa; Cortés Núñez, Jorge (I.S. Wehrtmann, J. Cortés (eds.) Marine Biodiversity of Costa Rica, Central America. Springer., 2009)
      Eighty-four species of benthic and one species of planktonic Foraminifera, classified under 40 genera and 34 families reported for Costa Rica are listed in this paper. These lists are based on literature data and ongoing ...
    • Informe Técnico Ambientes Marino Costeros de Costa Rica 

      Nielsen Muñoz, Vanessa; Quesada Alpízar, Marco A. (TNC (The Nature Conservancy), 2006)
      El presente informe técnico se realizó dentro del marco de trabajo definido por la Comisión Interdisciplinaria Marino Costera de la Zona Económica Exclusiva de Costa Rica y con el apoyo técnico y financiero de Conservación ...
    • Monitoreo de pastos marinos en Perezoso, Cahuita, Costa Rica (sitio CARICOMP) 

      Fonseca Escalante, Ana Cecilia; Nielsen Muñoz, Vanessa; Cortés Núñez, Jorge (Revista de Biología Tropical: Vol. 55 (1), 55-66, 2007-03)
      The seagrass of Perezoso (Cahuita National Park, Caribbean coast of Costa Rica) was monitored using the CARICOMP protocol. Productivity (2.7±1.15 g/m 2 /d; n=74) was intermediate, compared to other Caribbean sites. ...
    • Recolecta de artrópodos para prospección de la biodiversidad en el Área de Conservación Guanacaste, Costa Rica 

      Nielsen Muñoz, Vanessa; Hurtado Hernández, Priscilla; Janzen, Daniel Hunt; Tamayo Castillo, Giselle; Sittenfeld Appel, Ana (Revista de Biología Tropical 52(1): 119-132, 2004, 2004)
      This study describes the results and collection practices for obtaining arthropod samples to be studied as potential sources of new medicines in a bioprospecting effort. From 1994 to 1998, 1800 arthropod samples of 6-10 g ...
    • Regeneración de la vegetación arbórea en una pequeña reserva forestal urbana del nivel premontano húmedo, Costa Rica 

      Nielsen Muñoz, Vanessa; Hoomans, Judy; Fournier O., Luis A.; Di Stefano Gandolfi, José Francisco (Rev. Biol. Trop., 44(2): 575-580,1996, 1996)
      The tropical premontane moist forest is one of the most destructed Iife zones in Costa Rica. For such re­gions, a small natural preserve system has been proposed. An inventory of trees greater ...
    • The countries and languages that dominate biological research at the beginning of the 21st century 

      Monge Nájera, Julián; Nielsen Muñoz, Vanessa (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 

      Wehrtmann, Ingo S.; Nielsen Muñoz, Vanessa (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 ...