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Sobre terminología errónea en publicaciones entomológicas
Hilje,Luko;
Revista de Biología Tropical , 2011,
Abstract: on some misused terms in entomological publications. a glossary is presented, despite being a non-exhaustive one, which includes a little more than one hundred terms frequently misused in entomological publications. they are organized in accordance to their degree of acceptance by the real academia espa?ola. each one is accompanied by its correct alternative (sometimes with a brief justification of the suggested term), and its proper use is illustrated with an example. moreover, in addition to idiomatic mistakes themselves, a brief list of rather common conceptual mistakes is included, which correct use is explained. rev. biol. trop. 59 (3): 999-1006. epub 2011 september 01.
Sobre terminología errónea en publicaciones entomológicas
Luko Hilje
Revista de Biología Tropical , 2011,
Abstract: Este artículo consiste en un glosario, aunque no exhaustivo, de un poco más de cien términos con cierta frecuencia empleados de manera incorrecta en publicaciones entomológicas. éstos se clasifican según el grado de aceptación por parte de la Real Academia Espa ola. Cada uno es acompa ado por la opción correcta (a veces con una breve justificación del término sugerido), cuyo uso se ilustra con un ejemplo en cada caso. Asimismo, aparte de estos errores propiamente idiomáticos, se incluye una breve lista de ciertos errores de concepto, también comunes, cuyo correcto uso es explicado. On some misused terms in entomological publications. A glossary is presented, despite being a non-exhaustive one, which includes a little more than one hundred terms frequently misused in entomological publications. They are organized in accordance to their degree of acceptance by the Real Academia Espa ola. Each one is accompanied by its correct alternative (sometimes with a brief justification of the suggested term), and its proper use is illustrated with an example. Moreover, in addition to idiomatic mistakes themselves, a brief list of rather common conceptual mistakes is included, which correct use is explained. Rev. Biol. Trop. 59 (3): 999-1006. Epub 2011 September 01.
Hábitos alimenticios de la ardilla Sciurus variegatoides (Rodentia: Sciuridae) en la Península de Nicoya, Costa Rica
Monge,Javier; Hilje,Luko;
Revista de Biología Tropical , 2006,
Abstract: feeding habits of the squirrel sciurus variegatoides (rodentia: sciuridae) in the nicoya peninsula, costa rica. food items consumed by the squirrel sciurus variegatoides atrirufus were determined in an agricultural setting in the nicoya península (9o47? n, 84o56? w), costa rica, where two life zones (premontane moist forest basal belt transition, and tropical dry forest) predominate. by analyzing the gut contents of 120 squirrels, from february 1987 through january 1988, it was determined that coconut (cocos nucifera), indian almond (terminalia catappa) and flamboyant (delonix regia) were the most common dietary items. there were differences in food consumption according to age: adults preferred coconut, whereas young individuals preferred almond. this finding can be explained in terms of fruit characteristics, as well as tree architecture and accessibility for squirrels; almendro trees provide higher protection and a more accessible food resource, so that it was better used by young individuals. rev. biol. trop. 54(2): 681-686. epub 2006 jun 01.
Dr. Karl Hoffmann Brehmer
Luko Hilje Quirós
Acta Médica Costarricense , 2009,
Abstract:
Hábitos alimenticios de la ardilla Sciurus variegatoides (Rodentia: Sciuridae) en la Península de Nicoya, Costa Rica
Javier Monge,Luko Hilje
Revista de Biología Tropical , 2006,
Abstract: Se determinaron los componentes de la dieta de la ardilla Sciurus variegatoides atrirufus en un área agrícola de la Península de Nicoya, Costa Rica (9o47’ N, 84o56’ W), correspondiente a las zonas de vida Bosque Húmedo Premontano Transición a Basal y Bosque Seco Tropical. Al analizar el contenido estomacal de 120 ardillas, entre febrero de 1987 y enero de 1988, se determinó que los alimentos más importantes fueron el coco (Cocos nucifera), el almendro (Terminalia catappa) y el malinche (Delonix regia). Hubo diferencias en el tipo de alimento según la edad. Los adultos consumieron más el coco y los jóvenes el almendro, lo cual se explica por las características del fruto, así como por la arquitectura y acceso al árbol; el almendro aporta mejores condiciones de protección y un recurso alimenticio más accesible, por lo que fue mejor aprovechado por los individuos jóvenes. Feeding habits of the squirrel Sciurus variegatoides (Rodentia: Sciuridae) in the Nicoya Peninsula, Costa Rica. Food items consumed by the squirrel Sciurus variegatoides atrirufus were determined in an agricultural setting in the Nicoya Península (9o47’ N, 84o56’ W), Costa Rica, where two life zones (Premontane Moist Forest Basal Belt Transition, and Tropical Dry Forest) predominate. By analyzing the gut contents of 120 squirrels, from February 1987 through January 1988, it was determined that coconut (Cocos nucifera), indian almond (Terminalia catappa) and flamboyant (Delonix regia) were the most common dietary items. There were differences in food consumption according to age: adults preferred coconut, whereas young individuals preferred almond. This finding can be explained in terms of fruit characteristics, as well as tree architecture and accessibility for squirrels; almendro trees provide higher protection and a more accessible food resource, so that it was better used by young individuals. Rev. Biol. Trop. 54(2): 681-686. Epub 2006 Jun 01.
Influencia de coberturas en suelo sobre la selección del hospedante por Bemisia tabaci, en condiciones de invernadero
Hilje,Luko; Stansly,Phil A.;
Agronomía Costarricense , 2011,
Abstract: even though several ground covers, either inert or living, can reduce b. tabaci adult numbers arriving to tomato plants, the specific mechanism by which they act remains unknown. therefore, an experiment was conducted in a greenhouse in turrialba, costa rica, to determine b. tabaci response to both inert (green metal, and silver and yellow plastics) and living covers: perennial peanuts (arachis pintoi, fabaceae), “cinquillo” (drymaria cordata, caryophyllaceae) and coriander (coriandrum sativum, umbelliferae). these were compared to a control (bare soil). there were 4 replicates of each treatment. each cover was prepared in a large pot, surrounding a 15-cm tall tomato seedling. pots were distributed on the greenhouse floor, 40 cm apart. each experiment was replicated over 4 consecutive days, with treatments being randomized each time. a split-plot design was used, with ground covers as the main plot and dates as subplots. on the eve of each replicate, 1200 b. tabaci adults (a biotype) were released into the experimental area, and the next day adults on both the tomato plants and the respective covers were counted. adult numbers were by far highest on tomato plants sown in bare soil (p<0.01). furthermore, their numbers did not differ among ground covers, either living or inert (p>0.05). despite all covers interfering with insect’s ability to locate tomato plants, the underlying specific mechanism differed depending on each cover’s nature, except among living covers, which seemed to share the same mechanism
INFLUENCIA DE COBERTURAS EN SUELO SOBRE LA SELECCIóN DEL HOSPEDANTE POR Bemisia tabaci, EN CONDICIONES DE INVERNADERO
Luko Hilje,Phil A. Stansly
Agronomía Costarricense , 2011,
Abstract: Aunque varios tipos de coberturas en suelo (inertes o vivas) pueden reducir la afluencia de adultos de B. tabaci en plantas de tomate, se desconoce el mecanismo específico de acción de cada una de ellas. Por tanto, se realizó un experimento en un invernadero en Turrialba, Costa Rica, para determinar su respuesta tanto a coberturas inertes (metal verde y plástico plateado y amarillo) como vivas: maní forrajero (Arachis pintoi, Fabaceae), cinquillo (Drymaria cordata, Caryophyllaceae) y culantro (Coriandrum sativum, Umbelliferae). Se les comparó con un testigo (suelo desnudo). Hubo 4 repeticiones de cada tratamiento. Cada cobertura se sembró en una maceta grande, rodeado de una plántula de tomate de 15 cm de altura. Las macetas se colocaron sobre el piso del invernadero, espaciadas 40 cm entre sí. Cada experimento se repitió en 4 días consecutivos, para lo cual los tratamientos se aleatorizaron todos los días. Se utilizó un dise o de parcelas divididas, con las coberturas como la parcela principal y las fechas como las subparcelas. La víspera de cada repetición se liberaron 1200 adultos de B. tabaci (biotipo A) en el área experimental y al día siguiente se registraron sus datos tanto en la planta de tomate como en cada cobertura. Los números de adultos fueron mucho mayores (p<0,01) en las plantas de tomate del testigo que en las de todos los demás tratamientos. Asimismo, no difirieron entre los diferentes tipos de coberturas (p>0,05). Aunque todas interfieren con la habilidad de los adultos para localizar las plantas de tomate, el mecanismo específico de acción difirió según la naturaleza de cada una, excepto en las coberturas vivas, que parecen compartir el mismo mecanismo.
Alkaloids, Limonoids and Phenols from Meliaceae Species Decrease Survival and Performance of Hypsipyla Grandella Larvae  [PDF]
Julián Pérez-Flores, Sanford D. Eigenbrode, Luko Hilje-Quiroz
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.37117
Abstract: Meliaceae plants are distinguished by the attack of the shootborer Hypsipyla grandella and also for the occurrence of limonoids, alkaloids and phenolic compounds. Such compounds extracted from leaves of Meliaceae species Cedrela odorata L., Swietenia macrophylla King, Khaya senegalensis, Toona ciliata, and C. odorata grafted onto T. ciliata plants, were tested on C. odorata leaf disks to determine their effects on survival and performance of H. grandella larvae. Larval survival was assessed 2, 10 and 25 days after starting the bioassays. Leaf consumption and weight gain per larva, days to pupa and to adult stages, pupal weight and length, and moth wing appearance were assessed for larval performance. The three compunds from the four Meliaceae species and the grafted combination affected (P ≤ 0.02) larval leaf consumption, weight gain, time to pupa and to adult stages, wing development and larval survival of H. grandella. Pupa weight (P = 0.78, F = 0.72, d.f. = 18, 160) and length (P = 0.48, F = 0.98, d.f. = 18, 160) were similar regardless of the coumpound used. Limonoid reduced larval survival on the three dates of evaluation. Alkaloids decreased leaf consumption, weight gain of larvae and time needed to reach pupa and adult stages. Alkaloids from T. ciliata and phenols from C. odorata were the best coumpounds to reduce leaf consumption and weight gain. Alkaloids from the grafted plants caused 20% of H. grandella adults to form abnormal wings.
Development of Hypsipyla grandella (Zeller) (Lepidoptera: Pyralidae) in response to constant temperatures
Taveras, Rosina;Hilje, Luko;Carballo, Manuel;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000100002
Abstract: developmental response of the mahogany shootborer, hypsipyla grandella (zeller), to temperature was determined in laboratory trials in turrialba, costa rica. two hundred fresh eggs (less than 24h old) were placed individually inside glass flasks, and exposed to seven constant temperatures (10, 12.5, 15, 20, 25, 30 and 35°c), in separate experiments. these were carried out in environmental chambers, at 80-90% relative humidity and 8l:16d photoperiod. after hatch, larvae were fed tender foliage of spanish cedar (cedrela odorata) and were inspected every 24h to determine larval and pupal duration, and adult emergence, at each temperature. relationships between these variables and temperature were analyzed by means of anova, regression and correlation procedures. temperature greatly influenced development of h. grandella immature stages and adult emergence; development time varied between 30 days (30oc) and 104 days (15°c). larval mortality was high at those temperatures, reaching values of 90% (15°c) and 45% (30oc). also, mortality of the first larval instar was relatively high (51-75%) at all temperatures in the range 15-30°c, except at 25oc (14%). pupal weight was lower at extreme temperatures (15oc and 30oc). estimation of a common lower thermal threshold for all immature stages (8.5oc) allowed calculation of a general thermal constant (1320 degree-days), which could be used to predict population peaks in the field.
A survey of homopteran species (Auchenorrhyncha) from coffee shrubs and poró and laurel trees in shaded coffee plantations, in Turrialba, Costa Rica
Rojas,Liliana; Godoy,Carolina; Hanson,Paul; Hilje,Luko;
Revista de Biología Tropical , 2001,
Abstract: asurvey of homopteran species (auchenorryncha) was conducted in coffee plantations with no shade (c), and in those with shade of either poró (erythrina poeppigiana) (cp) or poró plus laurel (cordia alliodora) (cpl), in turrialba, costa rica. a total of 130 species in ten families were collected, dominated by cicadellidae (82 species). species richness was highest in the cp system (88), followed by cpl (74) and c systems (60). five most common species for all systems were fusigonalia lativittata, hebralebra nicaraguensis, neocoelidia sp., oliarus sp. and clastoptera sp. diversification of the coffee agroecosystem favors some species while limiting others, and have no effect on the majority of species. thus, only f. lativittata, neocoelidia sp. and scaphytopius ca. latidens were well represented in all systems, but were more abundant in coffee shrubs. additionally, the following were the dominant species in each system: graphocephala sp. 1 (c), f. lativittata (cp) and h. nicaraguensis (cpl). four species abundant on laurel trees, including h. nicaraguensis, appeared almost exclusively on these tree species. species similarity was highest on the cp and cpl systems (51 % of the species in common), followed by the c and cp (39 %) and the c and cpl systems (38 %). these findings show that even disturbed systems can harbor many insect species, so that they deserve attention from conservation advocatesand biologists
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