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Articles 3211 - 3240 of 6144
Full-Text Articles in Biodiversity
Wpa News 98 (2015), World Pheasant Association
Wpa News 98 (2015), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Winter 2015), number 98
Published by the World Pheasant Association
School Gardens: Cultivating A Child’S Nutritional Habits, Environmental Knowledge, And Sustainability Practices, Jeffrey Meltzer
School Gardens: Cultivating A Child’S Nutritional Habits, Environmental Knowledge, And Sustainability Practices, Jeffrey Meltzer
Honors Theses
School gardens have existed since the late nineteenth century and today are becoming increasingly popular in many parts of the world, including where I studied in Maine and Australia (AUS). Multiple organizations support school gardens in Maine, including the Maine School Garden Network, which has over 125 registered school gardens. In AUS, the Stephanie Alexander Kitchen Garden Foundation primarily supports the school garden movement and has over 800 registered school gardens. While many researchers have studied school gardens, few have compared two countries, focused on environmental sustainability, or investigated Maine in particular. This thesis combines information from literature reviews, and …
Evolution, Systematics & Geographic Parthenogenesis Of Ilyodromus (Crustacea, Ostracoda), Rylan James Shearn
Evolution, Systematics & Geographic Parthenogenesis Of Ilyodromus (Crustacea, Ostracoda), Rylan James Shearn
Theses
Most multicellular organisms reproduce sexually at some point in their life cycle. This is paradoxical because being asexual is theoretically far more advantageous. Asexual organisms do not need to find and court new mates, they reproduce at a faster rate, and with no males, all members of the population contribute toward population growth rate. With over 20, often mutually exclusive hypotheses, this paradox resists a synthesised explanation, and continues to represent one of the largest gaps in our understanding of fundamental evolutionary theory. Clearly, more real world studies are required that document the selective mechanisms underlying differences in evolutionary fitness …
Effects Of Proline And Glycine On The Cnidocyte Discharge Of Hydra Magnipapillata, Janine R. Appleton
Effects Of Proline And Glycine On The Cnidocyte Discharge Of Hydra Magnipapillata, Janine R. Appleton
Honors Theses and Capstones
The sense of taste enables animals to utilize environmental cues to detect favorable foods. Through specialized sensory receptors, Cnidarians employ stinging cells called cnidocytes to perform a variety of activities such as locomotion, capturing prey, inducing of feeding responses, and defense. Their discharge is highly regulated by mechanical and chemical signals that are mediated by a complex system including the opsin and taste pathways. Taste 1 Receptors (T1R) have previously been isolated in vertebrates but only until recently, have been noted in invertebrates. Receptors specific to L- amino acids corresponding to the taste sensation of umami, were studied to determine …
An Assessment Of The Role Of Roads In Population Demography And Genetic Structuring In Two Species Of Lizards In The Northern Chihuahuan Desert, Kevin Floyd
Open Access Theses & Dissertations
Roads can fragment habitat and increase mortality rates of wildlife, potentially reducing population sizes and gene flow, which in turn can reduce genetic diversity through genetic drift. Although negative road impacts have been found in a variety of taxa, not all species are impacted. For instance, species that move less and rarely encounter roads and those that avoid the roads are predicted to not be negatively affected. Yet tests of these predictions are uncommon, especially for reptiles and particularly lizards. Side-blotched lizards (Uta stansburiana) are small sit-and-wait predators, while the larger marbled whiptails (Aspidoscelis marmorata) are active foragers. Their responses …
European Frogbit (Hydrocharis Morsus-Ranae) In The Champlain/Adirondack Region: Recent Inferences, Chris Martine, Stephen Langdon, Timothy Shearman, Casey Binggeli, Timothy B. Mihuc
European Frogbit (Hydrocharis Morsus-Ranae) In The Champlain/Adirondack Region: Recent Inferences, Chris Martine, Stephen Langdon, Timothy Shearman, Casey Binggeli, Timothy B. Mihuc
Faculty Journal Articles
As part of its north-south movement following introduction to Canada, Hydrocharis morsus-ranae L. (Hydrocharitaceae) has recently become established in slow-moving waters of the Champlain/Adirondack region of the northeastern US. The species is present on both the New York and Vermont shores of Lake Champlain and, so far, at a single location in the interior of the Adirondack Park. The southernmost Champlain/Adirondack occurrence is in the Champlain Canal south of Whitehall, NY (L. Eichler, Darrin Freshwater Institute, pers. comm.), within 25 miles of the Hudson River watershed—a population first recorded around 2006. Entry into the Hudson watershed, whether from the canal …
Efficacy Of Dormant Season Herbicide Application On Control Of Japanese Honeysuckle (Lonicera Japonica) For Habitat Restoration In Kentucky, Jason L. Weese
Efficacy Of Dormant Season Herbicide Application On Control Of Japanese Honeysuckle (Lonicera Japonica) For Habitat Restoration In Kentucky, Jason L. Weese
Theses and Dissertations--Forestry and Natural Resources
Kentucky’s disappearing native grassland communities provide habitat for native flora and fauna. A study was conducted to compare the efficacy of herbicides in control of the invasive Japanese honeysuckle (Lonicera japonica) applied at times when most native species are dormant. Six herbicide mixtures (glyphosate, glyphosate + imazapyr, glyphosate + imazapic, imazapyr, triclopyr + difluphenzopyr, and metsulfuron + difluphenzopyr) were applied in three seasons to assess the effect of application timing of each mixture on honeysuckle control. Herbicides were applied with a CO2 pressurized sprayer at three sites in a randomized complete block design. Pretreatment sampling indicated that …
A Gis Assessment Of Ecoregion Representation In Chile's Existing And Proposed Integrated Network Of Protected Areas, Jessica Schutz
A Gis Assessment Of Ecoregion Representation In Chile's Existing And Proposed Integrated Network Of Protected Areas, Jessica Schutz
Graduate Student Theses, Dissertations, & Professional Papers
Chile's state designated protected areas are reported to show representation bias and to be unable to meet conservation goals. Private protected areas are considered an important tool to resolve these issues, which has led to support for increasing the role of private protected areas in Chile and creating an integrated public-private protected area network. But the validity of the capacity of private protected areas to fix Chile's state protected area network bias, and the advantage of creating an integrated protected area network, have not been assessed. This study uses the most recent data on Chile's state, private, and international protected …
Influence Of Landscape On Gene Differentiation In The American Pika (Ochotona Princeps) Within The Interstate 90 Snoqualmie Pass Corridor, Craig P. Fergus
Influence Of Landscape On Gene Differentiation In The American Pika (Ochotona Princeps) Within The Interstate 90 Snoqualmie Pass Corridor, Craig P. Fergus
All Master's Theses
Understanding the impact of different landscape features on the movement of genes among populations can be helpful in managing wildlife populations. Our study used GIS tools to compare genetic connectivity among 13 American pika (Ochotona princeps) habitat patches across an approximately 77 square km area adjacent to Interstate 90 near Snoqualmie Pass, WA. Tissue samples were collected from 85 individuals and genotyped at six microsatellite loci to determine genetic differentiation among each pair of patches. A variety of models estimating the influence of landscape factors on gene flow were then used to find “resistance scores” between each pair …
Behavioral Response Of Pacific Lamprey (Entosphenus Tridentatus) To Predator Odors, Laurie L. Porter
Behavioral Response Of Pacific Lamprey (Entosphenus Tridentatus) To Predator Odors, Laurie L. Porter
All Master's Theses
Pacific lamprey (Entosphenus tridentatus), a species facing serious threats to their existence, experience a number of challenges in reaching their desired spawning grounds during the adult migratory phase, and predators are suspected to be one of these challenges. Understanding if Pacific lamprey respond to predator odorants may provide a management tool for use in conjunction with attractants in guiding lamprey to suitable spawning habitat and deterring them from poor habitat. Previous research has failed to explore Pacific lamprey response to predator odorants, although much research exists on attractant odorants. In our study, we tested Pacific lamprey response to …
Reasoning Over Taxonomic Change: Exploring Alignments For The Perelleschus Use Case, Nico M. Franz, Mingmin Chen, Shizhuo Yu, Parisa Kianmajd, Shaun Bowers, Bertram Ludäscher
Reasoning Over Taxonomic Change: Exploring Alignments For The Perelleschus Use Case, Nico M. Franz, Mingmin Chen, Shizhuo Yu, Parisa Kianmajd, Shaun Bowers, Bertram Ludäscher
Computer Science Faculty Scholarship
Classifications and phylogenetic inferences of organismal groups change in light of new insights. Over time these changes can result in an imperfect tracking of taxonomic perspectives through the re-/use of Code-compliant or informal names. To mitigate these limitations, we introduce a novel approach for aligning taxonomies through the interaction of human experts and logic reasoners. We explore the performance of this approach with the Perelleschus use case of Franz & Cardona-Duque (2013). The use case includes six taxonomies published from 1936 to 2013, 54 taxonomic concepts (i.e., circumscriptions of names individuated according to their respective source publications), and 75 expert-asserted …
Assessing Changes In Avian Communities, Jessie D. Golding
Assessing Changes In Avian Communities, Jessie D. Golding
Graduate Student Theses, Dissertations, & Professional Papers
Grazing is a potentially powerful tool to address wildlife declines associated with land use conversion in the western United States. Grazing systems can be manipulated to achieve desired vegetation outcomes, preserve native habitat and economically benefit multiple stakeholders. As a result, systems designed to benefit native ecosystems are being widely implemented. However, the benefits of these grazing systems on many wildlife communities remain relatively unexplored. Songbirds provide an ideal study system to test these benefits because they continue to use native habitat that is currently grazed. Given limited time and resources, conservation practitioners often monitor a single focal species or …
Taxonomy And Molecular Epidemiology Of Echinococcus Granulosus Sensu Lato, Thomas Romig, Dennis Ebi, Marion Wassermann
Taxonomy And Molecular Epidemiology Of Echinococcus Granulosus Sensu Lato, Thomas Romig, Dennis Ebi, Marion Wassermann
Harold W. Manter Laboratory of Parasitology: Library Materials
Echinococcus granulosus, formerly regarded as a single species with a high genotypic and phenotypic diversity, is now recognized as an assemblage of cryptic species, which differ considerably in morphology, development, host specificity (including infectivity/pathogenicity for humans) and other aspects. This diversity is reflected in the mitochondrial and nuclear genomes and has led to the construction of phylogenetic trees and hypotheses on the origin and geographic dispersal of various taxa. Based on phenotypic characters and gene sequences, E. granulosus (sensu lato) has by now been subdivided into E. granulosus sensu stricto (including the formerly identified genotypic variants G1-3), …
Evolution Of Hematophagous Habit In Triatominae (Heteroptera: Reduviidae), Fernando Otálora-Luna, Antonio J. Pérez-Sánchez, Claudia Sandoval, Elis Aldana
Evolution Of Hematophagous Habit In Triatominae (Heteroptera: Reduviidae), Fernando Otálora-Luna, Antonio J. Pérez-Sánchez, Claudia Sandoval, Elis Aldana
Harold W. Manter Laboratory of Parasitology: Library Materials
All members of Triatominae subfamily (Heteroptera: Reduviidae), potential vectors of Trypanosoma cruzi, etiologic agent of the Chagas disease, feed on blood. Through evolution, these bugs have fixed special morphological, physiological, and behavioral aptations (adaptations and exaptations) adequate to feed on blood. Phylogeny suggests that triatomines evolved from predator reduvids which in turn descended from phytophagous hemipterans. Some pleisiomorphic traits developed by the reduvid ancestors of the triatomines facilitated and modeled hematophagy in these insects. Among them, mouthparts, saliva composition, enzymes, and digestive symbionts are the most noticeable. However, the decisive step that allowed the shift from predation to hematophagy …
Evaluation Of A Formula That Categorizes Female Gray Wolf Breeding Status By Nipple Size, Shannon M. Barber-Meyer, L. David Mech
Evaluation Of A Formula That Categorizes Female Gray Wolf Breeding Status By Nipple Size, Shannon M. Barber-Meyer, L. David Mech
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
The proportion by age class of wild Canis lupus (Gray Wolf) females that reproduce in any given year remains unclear; thus, we evaluated the applicability to our long-term (1972–2013) data set of the Mech et al. (1993) formula that categorizes female Gray Wolf breeding status by nipple size and time of year. We used the formula to classify Gray Wolves from 68 capture events into 4 categories (yearling, adult non-breeder, former breeder, current breeder). To address issues with small sample size and variance, we created an ambiguity index to allow some Gray Wolves to be classed into 2 categories. We …
Gray Wolf (Canis Lupus) Dyad Monthly Association Rates By Demographic Group, Shannon M. Barber-Meyer, L. David Mech
Gray Wolf (Canis Lupus) Dyad Monthly Association Rates By Demographic Group, Shannon M. Barber-Meyer, L. David Mech
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
Preliminary data from GPS-collared wolves (Canis lupus) in the Superior National Forest of northeastern Minnesota indicated wolves had low association rates with packmates during summer. However, aerial-telemetry locations of very high frequency (VHF)-radioed wolves in this same area showed high associations among packmates during winter. We analyzed aerial-telemetry-location data from VHF-collared wolves in several packs (n=18 dyads) in this same area from 1994-2012 by month, and found lowest association rates occurred during June. While other studies have found low association among wolf packmates during summer, information on differences in association patterns depending on the wolf associates’ demographics is …
Yellowstone Wolf (Canis Lupus) Density Predicted By Elk (Cervus Elaphus) Biomass, L. David Mech, Shannon M. Barber-Meyer
Yellowstone Wolf (Canis Lupus) Density Predicted By Elk (Cervus Elaphus) Biomass, L. David Mech, Shannon M. Barber-Meyer
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
The Northern Range (NR) of Yellowstone National Park (YNP) hosts a higher prey biomass density in the form of elk (Cervus elaphus L., 1758) than any other system of gray wolves (Canis lupus L., 1758) and prey reported. Therefore, it is important to determine whether that wolf–prey system fits a long-standing model relating wolf density to prey biomass. Using data from 2005 to 2012 after elk population fluctuations dampened 10 years subsequent to wolf reintroduction, we found that NR prey biomass predicted wolf density. This finding and the trajectory of the regression extend the validity of the model …
First Report Of The Herb Field Mouse, Apodemus Uralensis (Pallas, 1811) From Mongolia, Setev Shar, Nyamsuren Batsaikhan, Dietrich Dolch, Scott Gardner, Ottmar Kullmer, V. S. Lebedev, Davaa Lkhagvasuren, Ulrike Menz, Ravchig Samiya, Michael Stubbe, Нermann Ansorge
First Report Of The Herb Field Mouse, Apodemus Uralensis (Pallas, 1811) From Mongolia, Setev Shar, Nyamsuren Batsaikhan, Dietrich Dolch, Scott Gardner, Ottmar Kullmer, V. S. Lebedev, Davaa Lkhagvasuren, Ulrike Menz, Ravchig Samiya, Michael Stubbe, Нermann Ansorge
Scott L. Gardner Publications
The herb field mouse, Apodemus uralensis (Pallas, 1811) is recorded for the first time in Mongolia, from western part of the Mongolian Altai and the adjacent Mongolian part of the Dzungarian Gobi. In addition, we discovered several additional fi ndings of this species recorded as early as 1976 from different scientific collections. Body and skull measurements are presented along with a molecular genetic analysis of one specimen.
Phylogenetic And Fossil Evidence For A Common Body Size Attractor In Marine Mammals, William Gearty, Jonathan Payne
Phylogenetic And Fossil Evidence For A Common Body Size Attractor In Marine Mammals, William Gearty, Jonathan Payne
School of Biological Sciences: Presentations
Evolutionary transitions between terrestrial and aquatic habitats are rare and often have large effects on the evolutionary trajectory of the clade making the transition. Following a single transition from the marine realm to the terrestrial realm, tetrapods have subsequently re-evolved a marine lifestyle at least 30 separate times. At least six of these re-invasions of the water occurred within crown-group mammals and four [sirenians (Sirenia), whales (Cetacea), pinnipeds (Pinnipedia), and otters (Lutrinae)] clades are extant. Although marine mammals are widely known to be larger than their terrestrial sister groups, the extent to which the body size evolution of these clades …
Hymenolepis Folkertsi N. Sp. (Eucestoda: Hymenolepididae) In The Oldfield Mouse Peromyscus Polionotus (Wagner) (Rodentia: Cricetidae: Neotominae) From The Southeastern Nearctic With Comments On Tapeworm Faunal Diversity Among Deer Mice, Arseny A. Makarikov, Todd N. Nims, Kurt E. Galbreath, Eric P. Hoberg
Hymenolepis Folkertsi N. Sp. (Eucestoda: Hymenolepididae) In The Oldfield Mouse Peromyscus Polionotus (Wagner) (Rodentia: Cricetidae: Neotominae) From The Southeastern Nearctic With Comments On Tapeworm Faunal Diversity Among Deer Mice, Arseny A. Makarikov, Todd N. Nims, Kurt E. Galbreath, Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty Publications
A previously unrecognized species of hymenolepidid cestode attributable to Hymenolepis is described based on specimens in Peromyscus polionotus, oldfield mouse, from Georgia, United States, near the southeastern coast of continental North America. Specimens of Hymenolepis folkertsi n. sp. differ from those attributed to most other species in the genus by having testes arranged in a triangle and a scolex with a prominent rostrum-like protrusion. The newly recognized species is further distinguished by the relative position and length of the cirrus sac, shape of seminal receptacle, and relative size of external seminal vesicle and seminal receptacle. Hymenolepidid cestodes have sporadically …
A New Laelapine Mite (Acari: Mesostigmata: Laelapidae) Associated With The Spiny Rodent, Scolomys Melanops, In Amazonian Peru, Donald Gettinger, Scott L. Gardner
A New Laelapine Mite (Acari: Mesostigmata: Laelapidae) Associated With The Spiny Rodent, Scolomys Melanops, In Amazonian Peru, Donald Gettinger, Scott L. Gardner
Scott L. Gardner Publications
Gigantolaelaps scolomys Gettinger and Gardner n. sp., an ectoparasitic mite (Acari: Laelapidae) associated with the rodent Scolomys melanops in Amazonian forests of Peru, is described and illustrated.
Mites of the genus Gigantolaelaps Fonseca are common ectoparasites associated exclusively with rodents of the sigmodontine tribe Oryzomyini (see Gettinger, 1987). They are often abundant in the dorsal pelage and are easily collected by brushing the host at capture. The laelapine populations sampled are female dominant; males and immatures are assumed to live within the nest of the host (Martins-Hatano et al., 2011). A new species was encountered in a small collection of …
Helmintos Parásitos De Fauna Silvestre En Las Costas De Guerrero, Oaxaca Y Chiapas, México, Griselda Pulido-Flores, Scott Monks, Jorge Falcón-Ordaz, Juan Violante-González
Helmintos Parásitos De Fauna Silvestre En Las Costas De Guerrero, Oaxaca Y Chiapas, México, Griselda Pulido-Flores, Scott Monks, Jorge Falcón-Ordaz, Juan Violante-González
Estudios en Biodiversidad
La costa sureste del Pacífico en México es rica en biodiversidad, en parte por la posición en la intersección de las corrientes oceánicas ecuatoriales. Sin embargo, los helmintos son un grupo de organismos que ha sido poco estudiado en la región y los registros están en diversas fuentes de información. El propósito de este trabajo es juntar todos los registros de las diferentes especies de hemintos en uno solo. Los registros publicados de helmintos parásitos de vertebrados de la zona incluyen 192 especies de Digenea, Monogenea, Cestoda, Acanthocephala, Nematoda e Hirudinea. Los Digenea son los mejor representados con 34 familias …
Revisión Bibliográfica De Algunos Términos Ecológicos Usados En Parasitología, Y Su Aplicación En Estudios De Caso, Christian Elizbeth Bautista-Hernández, Scott Monks, Griselda Pulido-Flores, Amado Erick Rodríguez-Ibarra
Revisión Bibliográfica De Algunos Términos Ecológicos Usados En Parasitología, Y Su Aplicación En Estudios De Caso, Christian Elizbeth Bautista-Hernández, Scott Monks, Griselda Pulido-Flores, Amado Erick Rodríguez-Ibarra
Estudios en Biodiversidad
Se realizó una revisión bibliográfica de los términos ecológicos usados en parasitología, de acuerdo con Margolis et al. (1982), Esch et al. (1990), Bush et al. (1997), Bush et al. (2001) y Zander, (2001), que hasta 1982 era un conflicto en parasitología, ya que a que no existían conceptos establecidos para esta área del conocimiento, debido a que esta disciplina se enfocaba principalmente en investigaciones médicas. Aunado a esto, se incurría en conflictos con los conceptos ecológicos como hábitat, sitio, localidad entre otros de igual valor. Con base en lo anterior Margolis et al. (1982) propusieron el desarrollo de nuevos …
Revisión Del Uso De Céstodos Como Indicadores De Contaminación Por Metales Pesados En Mamíferos De Medios Terrestres, Jorge Falcón-Ordaz, Scott Monks, Griselda Pulido-Flores
Revisión Del Uso De Céstodos Como Indicadores De Contaminación Por Metales Pesados En Mamíferos De Medios Terrestres, Jorge Falcón-Ordaz, Scott Monks, Griselda Pulido-Flores
Estudios en Biodiversidad
En México son pocos los estudios realizados con invertebrados para conocer la concentración de metales pesados en el ambiente, los primeros trabajos fueron realizados con organismos acuáticos. Sin embargo, la necesidad de conocer la contaminación ambiental en medios terrestres ha llevado a los investigadores a utilizar otras herramientas, por ejemplo los helmintos, que se utilizan como bioindicadores de contaminación ambiental basados en su capacidad de absorción, y concentración de contaminantes del medio en su cuerpo. El uso de bioindicadores es ventajoso y económico comparado con el análisis directo de contaminantes por que solo las fracciones que están biológicamente disponibles son …
Nuevos Registros Y Redescripción De Rhabdochona Xiphophori Caspeta-Mandujano, Moravec Y Salgado- Maldonado, 2001 (Nematoda: Rhabdochonidae) En El Estado De Hidalgo, México, Jorge Falcón-Ordaz, Scott Monks, Griselda Pulido-Flores, Christian Elizbeth Bautista-Hernández, Sarahi Hernández-Hernández
Nuevos Registros Y Redescripción De Rhabdochona Xiphophori Caspeta-Mandujano, Moravec Y Salgado- Maldonado, 2001 (Nematoda: Rhabdochonidae) En El Estado De Hidalgo, México, Jorge Falcón-Ordaz, Scott Monks, Griselda Pulido-Flores, Christian Elizbeth Bautista-Hernández, Sarahi Hernández-Hernández
Estudios en Biodiversidad
Teniendo en cuenta la diversidad de los ecosistemas acuáticos en México y la infinita riqueza de especies de peces en el país, la lista actual de nemátodos parásitos de peces de agua dulce en México está incompleta. Hasta la fecha en México el género Rhabdochona se encuentra registrado como parásito en una amplia gama de familias de peces de agua dulce. El objetivo del presente trabajo es redescribir ejemplares de Rhabdochona xiphophori parásita de Xiphophorus malinche colectados de dos localidades del estado de Hidalgo y compararlos morfológicamente.
Importancia De Las Aves Ictiófagas Como Hospederos Finales De Helmintos, En Dos Lagunas Costeras Del Estado De Guerrero, México, Juan Violante-González, Griselda Pulido-Flores, Scott Monks, Agustín A. Rojas-Herrera, Miguel A. Melo-García, Sergio García-Ibáñez, Edgar León Esparza-Ibarra, Edvino Larumbe-Morán, Jonatan Carbajal-Violante
Importancia De Las Aves Ictiófagas Como Hospederos Finales De Helmintos, En Dos Lagunas Costeras Del Estado De Guerrero, México, Juan Violante-González, Griselda Pulido-Flores, Scott Monks, Agustín A. Rojas-Herrera, Miguel A. Melo-García, Sergio García-Ibáñez, Edgar León Esparza-Ibarra, Edvino Larumbe-Morán, Jonatan Carbajal-Violante
Estudios en Biodiversidad
Se examinó la composición y riqueza de comunidades de helmintos en tres especies de aves ictiófagas: Ardea alba, Nyctanassa violacea y Phalacrocorax brasilianus en dos lagunas costeras del estado de Guerrero, México. La helmintofauna estuvo constituida por 23 especies: 17 digéneos, un acantocéfalo, dos céstodos y tres nemátodos. Cinco especies (Ascocotyle longa, Mehrastomum minutum, Riberoia ondatrae, Southwellina hispida y Contracaecum multipapillatum) co-ocurrieron en las tres especies de aves de ambas lagunas. Los niveles de infección de un 50% de las especies identificadas, variaron significativamente entre las especies de aves y lagunas. A nivel componente, la riqueza de especies varió significativamente …
Evaluación De Las Infracomunidades De Tres Especies De Peces En Dos Localidades De La Huasteca Hidalguense, Christian Elizbeth Bautista-Hernández, Scott Monks, Griselda Pulido-Flores
Evaluación De Las Infracomunidades De Tres Especies De Peces En Dos Localidades De La Huasteca Hidalguense, Christian Elizbeth Bautista-Hernández, Scott Monks, Griselda Pulido-Flores
Estudios en Biodiversidad
Uno de los problemas más severos y menos controlados en México es el gran número de especies introducidas en las cuencas del país, hecho que pone en peligro la existencia de muchas de las especies endémicas. Además, las especies introducidas pueden transportar sus parásitos, que con frecuencia afectan a las poblaciones de especies endémicas. Anteriormente se realizó un estudio de las comunidades de parásitos de tres especies de peces, dos endémicas y una exótica (Xiphophorus birchmanni, Pseudoxiphophorus bimaculata y Amatitlania nigrofasciata). En ese trabajo se realizó el análisis de éstas comunidades evaluándolas a nivel infracomunidad, además se calculó la caracterización …
Parasitofauna De Peces De Lagunas Costeras Del Estado De Guerrero, México, Juan Violante-González, Griselda Pulido-Flores, Scott Monks, Agustín A. Rojas-Herrera, Jaime Salvador Gil-Guerrero, Sergio García-Ibáñez, Jonatan Carbajal-Violante
Parasitofauna De Peces De Lagunas Costeras Del Estado De Guerrero, México, Juan Violante-González, Griselda Pulido-Flores, Scott Monks, Agustín A. Rojas-Herrera, Jaime Salvador Gil-Guerrero, Sergio García-Ibáñez, Jonatan Carbajal-Violante
Estudios en Biodiversidad
No obstante que los parásitos representan un porcentaje muy importante de la biodiversidad global a nivel mundial, en muchas ocasiones son excluidos de estudios con este enfoque, debido principalmente a que han sido considerados durante muchos años, como simples agentes causantes de enfermedad. A partir de los datos obtenidos de varios estudios parasitológicos de peces y aves, efectuados en algunas lagunas costeras del estado de Guerrero a lo largo de varios años, se presenta un análisis global de la riqueza de la parasitofauna de peces, en estos altamente productivos y complejos sistemas acuáticos. La parasitofauna total estuvo constituida por 66 …
The European Union’S Potential Contribution To Protect Marine Biodiversity In The Changing Arctic: A Roadmap, Nengye Liu, Elizabeth Kirk
The European Union’S Potential Contribution To Protect Marine Biodiversity In The Changing Arctic: A Roadmap, Nengye Liu, Elizabeth Kirk
Research Collection Yong Pung How School Of Law
This article provides a roadmap for possible European Union (eu) action in the protection of marine biodiversity in the changing Arctic. First the eu’s competence in the Arctic is briefly introduced. Then the discussion turns to the eu’s potential external and internal actions in shipping, fisheries and offshore oil and gas operations that could possibly enhance the international legal regime for the protection of marine biodiversity in the Arctic. The eu’s role vis-à-vis the global biodiversity regime and cross-cutting measures under the United Nations Convention on the Law of the Sea are discussed together in the final part.
A Comparison Of The Effects Of Burning, Haying And Mowing On Plants And Small Mammals In A Tallgrass Prairie Reconstruction, Ryan Allan Neuhaus
A Comparison Of The Effects Of Burning, Haying And Mowing On Plants And Small Mammals In A Tallgrass Prairie Reconstruction, Ryan Allan Neuhaus
Dissertations and Theses @ UNI
Fire is an effective management tool for reconstructed prairies. However, due to safety concerns, road departments and other prairie managers are sometimes reluctant to use fire. Therefore, alternative techniques to manage reconstructed prairie, such as mowing or haying, need to be considered. The goal of this study is to determine if mowing and/or haying can be used to manage vegetation in lieu of fire for prairie reconstructions. This study examines the effects of four management techniques on plant and small mammal species in a tallgrass prairie reconstruction. No management, mowing, haying, and burning were replicated six times using a split …