Browsing Theses & Dissertations by Title
Now showing items 920-939 of 3469
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Disponibilidad de presas para aves playeras en las salinas de Cabo Rojo, Puerto Rico y su relación con los factores físicos de la región
(2006)The Cabo Rojo, Puerto Rico salterns constitute one of the most impressive ecological realms of the island. Besides harboring a rich invertebrate fauna, thousands of birds have made a feeding and rest stopover of the area ... -
Disposición a pagar de los consumidores por leche de calidad superior en Puerto Rico: resultados del método de valoración contingente
(2020-07-24)The dairy industry is the most important sector in Puerto Rico's agricultural economy but has been affected by changes in consumer preferences. One strategy to address this issue is to offer consumers unique products with ... -
Disposición a pagar por la conservación del bosque urbano en la finca Montaña, Aguadilla
(2018-12-04)This research used the contingent valuation method through personal interviews to estimate the willingness to pay for the conservation of the urban forest at Finca Montaña, Aguadilla. A total of 371 useful interviews were ... -
Disrupting colonial debates : Puerto Rican subjectivities in cultural essays
(2017-05-23)My thesis explores Puerto Rican cultural and political subjectivities in essays by critics Arcadio Díaz Quiñones, Rubén Ríos Ávila, and Frances Negrón Muntaner as discursive spaces of disruption, exposing the island's lived ... -
Distension mechanism of a compliant tube caused by partial downstream fluid flow obstruction
(2019-12-10)This investigation examines the distension of a silicone tube through experiments and finite element modeling. Three experiments were conducted to examine the distension of the tube. Two experimental configurations were ... -
Distribución de voltaje en aisladores de suspensión utilizando el método de elemento finito
(2005)En la tesis que aquí se presenta, hemos propuesto el uso del Método de Elemento Finito (FEM, por sus siglas en inglés) como herramienta para simular la distribución de voltajes en aisladores de suspensión. El propósito ... -
Distribución temporal de hongos miceliales en una zona industrial en Mayagüez, Puerto Rico
(2009)Indoor air quality in the production buildings of Surfaceigniter Corporation in Mayagüez, Puerto Rico was assessed by studying the temporal distribution of filamentous fungi. A Krestrel 4000 monitor was used to record ... -
Distribución vertical de Glomerella cingulata (Colletotrichum gloeosporioides) sobre una siembra comercial de gandul (Cajanus cajan L.)
(2005)Pigeon pea [Cajanus cajan (L.) Millsp.], a crop of great importance in tropical countries, is affected by pod anthracnose, caused by Colletotrichum spp. The objectives of this investigation were to study the vertical and ... -
Distribución y abundancia de la reinita de Bosque Enano (Dendroica angelae) en el bosque de Maricao y en áreas adyacentes
(2008)The Elfin-woods Warbler (Dendroica angelae) (EWWA hereafter) is a threatened endemic species of Puerto Rico with a current limited distribution to the Caribbean National Forest, and Maricao Forest. The objectives of this ... -
Distribución y concentración de las poblaciones de Pyrodinium bahamense en Laguna Grande, Las Cabezas de San Juan, Fajardo, Puerto Rico
(2015)Laguna Grande is part of The Natural Reserve of Las Cabezas de San Juan, Fajardo, Puerto Rico. It has been a tourist and scientific attraction because it presents the phenomenon of bioluminescence all the year round. ... -
Distribution and frequencies of medicaly relevant mutations in the Puerto Rican population
(2018-05)Detection of medically related mutations is fundamental to both the successful treatment and overall improvement in the quality of life for human populations with increased susceptibility to human disorders. On the population ... -
Distribution of exotic Australian crayfish Cherax quadricarinatus (Von Martens, 1868) in Puerto Rico
(2008)The crustacean Cherax quadricarinatus (redclaw), a crayfish from Australia that is widely cultured, was introduced illegally into Puerto Rico in the beginning of 1997. They escaped from a single culture facility at the ... -
Distribution of Harpellales (Kickxellomycotina) in Culicidae and Chironomidae in Urban sites in Mayagüez and Arecibo, Puerto Rico
(2020-05-29)Harpellales fungi are obligate symbionts. They need a live host in order to grow and reproduce. They are found in the digestive tract of various arthropods (including insects), attached without penetration to the gut lining. ... -
Distribution of polycyclic aromatic hydrocarbons degrading bacteria in southern coastal sediments of Puerto Rico
(2010)Most probable number technique was used for enumeration of heterotrophic bacteria. For enumeration of PAHs, the degrading bacteria overlayer technique was used. Higher numbers of heterotrophic bacteria were observed for ... -
Distribution of roving herbivorous fishes on coral reefs at multiple spatial scales
(2013)Roving herbivorous fishes are an integral part of the biodiversity of coral reefs due to their high abundance and ecological role as grazers of benthic algae. The present study examined the ecology of surgeounfish ... -
Distribution patterns of reef fishes in southwest Puerto Rico, relative to structural habitat, cross-shelf location, and ontogenetic stage
(2006)This work applies a Cross-Shelf Habitat (CSH) framework to delineate habitat usage patterns for twenty-eight species from five families of common reef fishes (Acanthuridae, Serranidae, Haemulidae, Lutjanidae, Scaridae) ... -
Distribution, habitat occupancy and population density of the Elfin-woods Warbler (Dendroica angelae) in Puerto Rico
(2006)The Elfin-woods Warbler (Dendroica angelae) is a threatened species endemic to montane forests in Puerto Rico. The objectives of this study were to determine the current geographical distribution, spatial distribution ... -
Divergent thinking in the English classroom: Center stage for stories, poems and cultural expressions through dance
(2014)This study demonstrates how dance performances can be used as a text within seventh, eighth and ninth grade English classes in Puerto Rico. The inclusion of dance performances enables students to relate to dance as a text, ... -
Diversidad de Collembola (Hexapoda) asociados a Rhyzophora mangle en manglares de Puerto Rico.
(2006)Collembolans are small hexapods characterized by the presence of a ventral tube and a jumping organ known as a furcula, for which they are called springtails. Although more than 700 species are recorded from the Neotropics, ... -
Diversidad de hormigas (Insecta: Hymenoptera: Formicidae) en cultivos de cítricos y áreas boscosas aledañas a zonas agrícolas del oeste de Puerto Rico.
(2012)The purpose of this investigation was to study the composition of the ant fauna in citric plantations and in nearby forested areas within the three agricultural experiment substations of the west side of Puerto Rico and ...