Academic literature on the topic 'Microlophus'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Microlophus.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Microlophus"

1

Beuttner, Antonia, and Claudia Koch. "Analysis of diet composition and morphological characters of the Peruvian lizard Microlophus stolzmanni (Squamata: Tropiduridae)." Phyllomedusa: Journal of Herpetology 18, no. 1 (June 18, 2019): 47–62. http://dx.doi.org/10.11606/issn.2316-9079.v18i1p47-62.

Full text
Abstract:
Analysis of diet composition and morphological characters of the Peruvian lizard Microlophus stolzmanni (Squamata: Tropiduridae). Microlophus stolzmanni is a diurnal lizard that is endemic to the dry forest of northern Peru. Little is known about the ecology of the species and the composition of its diet never has been studied. The stomach contents and morphological features related to feeding behavior are analyzed herein. Microlophus stolzmanni is a semi-herbivorous food generalist that also consumes animal items. All age groups prefer sedentary prey for which M. stolzmanni forages actively. As the lizard matures, plant material becomes a more important part of the diet.
APA, Harvard, Vancouver, ISO, and other styles
2

Kizirian, David, Adrienne Trager, Maureen A. Donnelly, and John W. Wright. "Evolution of Galapagos Island Lava Lizards (Iguania: Tropiduridae: Microlophus)." Molecular Phylogenetics and Evolution 32, no. 3 (September 2004): 761–69. http://dx.doi.org/10.1016/j.ympev.2004.04.004.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Vidal, Marcela, Juan C. Ortiz, Gustavo Escobar, and Fernando Torres-Pérez. "Identidad taxonómica de Microlophus heterolepis (Wiegmann, 1835) y Microlophus yanezi (Ortiz, 1980): Dos buenas especies del desierto interior de Chile y Perú." Gayana (Concepción) 81, no. 2 (December 2017): 100–110. http://dx.doi.org/10.4067/s0717-65382017000200100.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Chávez-Villavicencio, César, Yohani Ibáñez-Álvarez, and Jesús Manuel Charcape Ravelo. "Selección de hábitat y composición de la dieta de Microlophus occipitalis (Reptilia: Tropiduridae) en Sechura, Piura - Perú." Revista peruana de Biología 25, no. 3 (September 25, 2018): 221. http://dx.doi.org/10.15381/rpb.v25i3.13403.

Full text
Abstract:
Microlophus occipitalis es una lagartija diurna que se distribuye en las costas de Ecuador y Perú, de la cual se pretende determinar el uso y selección de los recursos de hábitat, así como los principales componentes de su dieta. Se trabajó en la laguna Ñapique (Piura, Perú), usando el Diseño Tipo I de Manly (la disponibilidad y uso se estiman para todos los individuos de la especie dentro del área de estudio), y el Coeficiente de Selección de Manly para determinar la selección de recursos. La composición de la dieta y amplitud del nicho trófico se analizó con el índice de Levins estandarizado. Un total de 1055 observaciones permitieron determinar que M. occipitalis seleccionó los recursos Tronco y Piedra. La actividad dominante fue la Alimentación, seguida del Soleamiento. Existió un alto consumo de Himenópteros, seguido de los Coleópteros. Microlophus occipitalis es una especie que usa principalmente los troncos y las piedras que se presentan en su hábitat para poder termorregular. Su principal actividad es la alimenticia. Es una especie carnívora que en la temporada de primavera-verano consume principalmente hormigas y coleópteros pero complementa su dieta con flores y hojas en baja cantidad, en un consumo aparentemente accidental.
APA, Harvard, Vancouver, ISO, and other styles
5

Guzmán, Alfredo, and Juan Carlos Jordán. "Resource partitioning between Microlophus occipitalis and Stenocercus puyango (Sauria: Tropiduridae) in Cerros de Amotape National Park, Tumbes, Peru." Revista Peruana de Biología 28, no. 3 (August 31, 2021): e21115. http://dx.doi.org/10.15381/rpb.v28i3.21115.

Full text
Abstract:
Activity, microhabitat use, and diet are patterns commonly used to define the saurian community structure, because of differential exploitation allowing coexistence at the same time and place. We analyze resource partitioning between two sympatric saurian species, Stenocercus puyango and Microlophus occipitalis, in the transitional area of the Pacific Tropical Forest and the Dry Forest inside Cerros de Amotape National Park (PNCA) in Tumbes, northwestern of Peru. Microlophus occipitalis and S. puyango both showed a unimodal activity pattern with higher activity around 13:00 h, with a mean body temperature of 34.83 °C and 32.17 °C respectively, observing a significant relationship between body and environmental (air and substrate) temperatures. Rocks and tree trunks were the most frequent microhabitats used by M. occipitalis while S. puyango were registered more frequently over leaf litter. The diets of both tropidurids were composed by arthropods, ants, and insect larvae mainly. Similarities in activity times (temporal niche) and diet (trophic niche) should be related to phylogenetic relationship and environmental characteristics of PNCA (seasonality, vegetal composition) meanwhile differences in space use and microhabitat thermal quality will be related to thermal quality in the area.
APA, Harvard, Vancouver, ISO, and other styles
6

Whittier, Thomas R., and Karsten E. Hartel. "First Records of Redear Sunfish (Lepomis microlophus) in New England." Northeastern Naturalist 4, no. 4 (1997): 237. http://dx.doi.org/10.2307/3858609.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

RANJBAR, MASSOUD, ALI ASKARI, and SOMEH MOHAMMADI. "A contribution to Centaurea sect. Microlophus (Asteraceae, Cardueae) in Iran." Phytotaxa 361, no. 2 (July 19, 2018): 151. http://dx.doi.org/10.11646/phytotaxa.361.2.2.

Full text
Abstract:
Centaurea masjedsoleymanensis endemic to SW Iran and C. palanganensis endemic to W Iran are described as new species and illustrated. Centaurea masjedsoleymanensis is distinguished from its closely related species, C. pabotii, by having shorter median and upper cauline leaves, a spine of phyllaries up to 4 mm long, incised median cauline leaves, and smaller upper cauline leaves. Centaurea palanganensis is distinguished from C. thracica by having decurrent median cauline leaves, oblong or elliptic basal cauline leaves, phyllaries with a median appendage 10–13 mm long and a spine up to 2 mm long. The IUCN conservation status of both new species is evaluated as Vulnerable (VU). Results from cytogenetic analyses indicated that new taxa are diploid (2n = 2x = 16), which is consistent with the proposed base number of x = 8 for the genus. Meiosis was observed as regular, with bivalent pairing and normal chromosome segregation. Based on the results x = 8 and 9 was determined for C. sect. Microlophus. The relationships between chromosome numbers, geographical distribution and ploidy levels indicate that both aneuploidy and polyploidy have played an important role in the speciation processes in this section.
APA, Harvard, Vancouver, ISO, and other styles
8

Watkins, Graham G. "Proximate Causes of Sexual Size Dimorphism in the Iguanian Lizard Microlophus Occipitalis." Ecology 77, no. 5 (July 1996): 1473–82. http://dx.doi.org/10.2307/2265544.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Jordan, M. A., R. L. Hammond, H. L. Snell, H. M. Snell, and W. C. Jordan. "Isolation and characterization of microsatellite loci from Galapagos lava lizards (Microlophus spp.)." Molecular Ecology Notes 2, no. 3 (September 2002): 349–51. http://dx.doi.org/10.1046/j.1471-8286.2002.00247.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Porta, Michael J., and Richard A. Snow. "First record of pughead deformity in redear sunfish Lepomis microlophus (Günther, 1859)." Journal of Applied Ichthyology 35, no. 3 (April 2019): 775–78. http://dx.doi.org/10.1111/jai.13904.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Microlophus"

1

Garza, Mark Isaac. "Predator induced defenses in prey with diverse predators." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3309.

Full text
Abstract:
Phenotypic plasticity is an environmentally based change in phenotype and can be adaptive. Often, the change in an organism's phenotype is induced by the presence of a predator and serves as a defense against that predator. Defensive phenotypes are induced in freshwater physid snails in response to both crayfish and molluscivorous fish. Alternative morphologies are produced depending on which of these two predators snails are raised with, thus protecting them from each of these predators' unique mode of predation. Snails and other mollusks have been shown to produce thicker, differently shaped shells when found with predators relative to those found without predators. This production of thicker, differently shaped shells offers better protection against predators because of increased predator resistance. The first study in this thesis explores costs and limits to plasticity using the snailfish- crayfish system. I exposed juvenile physid snails (using a family structure) to either early or late shifts in predation regimes to assess whether developmental flexibility is equally possible early and late in development. Physid snails were observed to produce alternative defensive morphologies when raised in the presence of each of the two predators. All families responded similarly to the environment in which they were raised. Morphology was found to be heritable, but plasticity itself was not heritable. Morphology was found to become less flexible as snails progressed along their respective developmental pathways. In the second study, I raised physid snails with and without shell-crushing sunfish and examined the differences in shell thickness, shell mass, shell size and shell microstructural properties between the two treatment groups. Shells of snails raised with predators were found to be larger, thicker and more massive than those raised without predators, but differences in microstructure were found to be insignificant. I conclude that the observed shell thickening is accomplished by the snails' depositing more of the same material into their shells and not by producing a more complex shell composition.
APA, Harvard, Vancouver, ISO, and other styles
2

Ramírez, Peralta César Augusto, and Peralta César Augusto Ramírez. "Ciclo reproductivo de Microlophus peruvianus (Lesson, 1826) (Sauria, Tropiduridae) de la costa de Huaura, Lima (Perú)." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2017. http://cybertesis.unmsm.edu.pe/handle/cybertesis/6553.

Full text
Abstract:
Publicación a texto completo no autorizada por el autor
Contribuye al conocimiento de la biología y ecología reproductiva de M. peruvianus. Los resultados indican que esta especie presenta ciclo reproductivo estacional, determinado por el ciclo ovárico. Tanto los volúmenes ováricos como los testiculares presentaron correlación positiva con la humedad relativa, y correlación negativa con la temperatura y las horas de luz diurna. Reporta que la talla de la primera madurez sexual es de 61.6 mm en hembras y de 63.9 mm en machos. El tamaño de puesta es de 4.24 (±1.56, n=34) con un rango de 2 a 7 huevos, este se relaciona directamente con el tamaño de las hembras y se sugiere puestas anuales múltiples. El ciclo de cuerpos grasos es estacional. Se determina dimorfismo sexual en tamaño corporal así como en patrones de coloración gular y de flancos del cuerpo. Estos resultados permiten evidenciar las estrategias reproductivas que esta especie utiliza para reproducirse en los ambientes litorales del desierto costero, estos están modulados principalmente por las condiciones termales y la disponibilidad de recursos alimenticios, expresándose en una gran capacidad para adaptarse a los ambientes áridos.
Tesis
APA, Harvard, Vancouver, ISO, and other styles
3

Ramírez, Peralta César Augusto. "Ciclo reproductivo de Microlophus peruvianus (Lesson, 1826) (Sauria, Tropiduridae) de la costa de Huaura, Lima (Perú)." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2017. https://hdl.handle.net/20.500.12672/6553.

Full text
Abstract:
Publicación a texto completo no autorizada por el autor
Contribuye al conocimiento de la biología y ecología reproductiva de M. peruvianus. Los resultados indican que esta especie presenta ciclo reproductivo estacional, determinado por el ciclo ovárico. Tanto los volúmenes ováricos como los testiculares presentaron correlación positiva con la humedad relativa, y correlación negativa con la temperatura y las horas de luz diurna. Reporta que la talla de la primera madurez sexual es de 61.6 mm en hembras y de 63.9 mm en machos. El tamaño de puesta es de 4.24 (±1.56, n=34) con un rango de 2 a 7 huevos, este se relaciona directamente con el tamaño de las hembras y se sugiere puestas anuales múltiples. El ciclo de cuerpos grasos es estacional. Se determina dimorfismo sexual en tamaño corporal así como en patrones de coloración gular y de flancos del cuerpo. Estos resultados permiten evidenciar las estrategias reproductivas que esta especie utiliza para reproducirse en los ambientes litorales del desierto costero, estos están modulados principalmente por las condiciones termales y la disponibilidad de recursos alimenticios, expresándose en una gran capacidad para adaptarse a los ambientes áridos.
Tesis
APA, Harvard, Vancouver, ISO, and other styles
4

Guzman, Caldas Alfredo Leonardo. "Repartición de recursos entre Stenocercus puyango (Torres-Carvajal, 2005) y Microlophus occipitalis (Peters, 1871) (Sauria: Tropiduridae) en el Parque Nacional Cerros de Amotape, Tumbes, Perú." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2016. https://hdl.handle.net/20.500.12672/4973.

Full text
Abstract:
Se analizó el uso de recursos espacial, temporal y trófico y adicionalmente algunos aspectos de la ecología termal y morfología, entre dos especies de Tropidúridos: Stenocercus puyango y Microlophus occipitalis en la zona de transición del Bosque Tropical del Pacifico y el Bosque Seco en el Parque Nacional Cerro de Amotape (PNCA), (Tumbes, Perú). Microlophus occipitalis y S. puyango presentaron un patrón de actividad unimodal con un pico de actividad hacia las 13:00 horas. Asimismo, la temperatura corporal promedio de S. puyango fue de 32,17 ºC, mientras que para M. occipitalis fue de 34,83 ºC, encontrándose una asociación significativa con las temperaturas ambientales (aire y suelo). Los microhábitats más utilizados fueron la hojarasca para S. puyango y los troncos caídos para M. occipitalis. Por otro lado, la dieta de ambos Tropidúridos estuvo compuesta por artrópodos, principalmente hormigas y larvas de insectos, además, se registraron diferencias morfológicas en los tamaños y pesos promedio entre ambas especies, siendo S. puyango la que presentó mayores valores. Las similitudes encontradas tanto en los horarios de actividad (nicho temporal) como en la dieta (nicho trófico), se encuentran probablemente asociadas a su parentesco filogenético a nivel de familia y/o características ambientales propias del PNCA. Del mismo modo, las diferencias en el uso del espacio (nicho espacial) entre ambas especies de Tropidúridos así como en sus temperaturas corporales y morfología, estarían asociadas a diferencias en la selección de sus microhábitats dentro del PNCA. Palabras clave: Repartición de recursos, Stenocercus puyango, Microlophus occipitalis, nicho temporal, espacial y trófico, Parque Nacional Cerros de Amotape.
--- Use of spatial, temporal and trophic niches and some aspects of thermal ecology and morphology between two species of Tropiduridae: Microlophus occipitalis and Stenocercus puyango in the transition zone of the pacific tropical and dry forest in Cerros de Amotape National Park (PNCA), Tumbes, Peru was studied. Microlophus occipitalis and S. puyango displayed an unimodal activity pattern with peak activity at 13:00, and an average body temperature for M. occipitalis and S. puyango of 34,83 and 32,17 ºC respectively. Significant relationships between body and air and soil temperatures were recorded. Most microhabitats used were the fallen logs for M. occipitalis and leaf litter for S. puyango. The diet of both tropidurids was composed of arthropods, mainly ants and insect larvae. Moreover, morphological differences in average sizes and weights were recorded between both species. The similarities found in both time of activity (temporal niche) and diet (food niche) are probably associated with their phylogenetic relationship and to own environmental features within the PNCA. Differences in the use of space and body temperature between both species would be associated with differences in the selection of microhabitats within the PNCA. Key words: Resource partitioning, Stenocercus puyango, Microlophus occipitalis, temporal, spatial and trophic niches, Cerros de Amotape National Park.
Tesis
APA, Harvard, Vancouver, ISO, and other styles
5

Olivera, Jara Diego Alfonso. "Ecología termal de Microlophus tigris (Tschudi, 1845) (Sauria: Tropiduridae) "Lagartija de las lomas" en dos altitudes en la región Lima (Perú) durante la época seca." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2015. https://hdl.handle.net/20.500.12672/4217.

Full text
Abstract:
Es conocido especies emparentadas presentan semejanzas en la selección de temperaturas corporales, a pesar de encontrarse en hábitats distintos, sobretodo en grupos con amplia distribución. Microlophus tigris es una especie endémica del Perú, distribuida latitudinalmente desde el norte cerca de la ciudad de Trujillo hasta Arequipa en el sur; altitudinalmente puede encontrársele desde próximo al nivel del mar en formaciones vegetales de lomas hasta los 2800m en las estribaciones andinas. Teniendo presente que tanto la latitud como la altitud pueden tener efecto sobre la selección de temperaturas corporales en los saurios, se seleccionaron dos poblaciones a similar latitud pero diferente altitud en el departamento de Lima (Perú), la diferencia entre la primera localidad, Mangomarca, y la segunda, San Bartolomé, fue de 1500m. Al ser los hábitats distintos se esperaron respuestas distintas frente al ambiente por parte de M. tigris con el fin de mantener su temperatura corporal en rangos similares en ambas localidades, siguiendo el principio de inercia termal de Bogert (1949). Se determinó la temperatura corporal media de M. tigris en ambas localidades (34.2 ± 0.2°C, Mangomarca, y 33.3 ± 0.4°C, San Bartolomé) (t ± SE), evidenciándose diferencias en la selección de temperaturas corporales entre ambas localidades, no así entre sus temperaturas de selección tomadas bajo condiciones de laboratorio. Mediante el protocolo seguido por Smith (1976) se evaluó las constantes de tiempo térmico entre ambas poblaciones con el fin de estimar el tiempo de costo de termorregulación (Ct), encontrándose que con la altitud los individuos incrementan su temperatura más lentamente prolongando su tiempo de toma de sol, posiblemente a causa del aumento de radiación con la altitud. Microlophus tigris mostro ser un buen termorregulador en ambas localidades (aplicando el protocolo de Hertz et al. 1993) teniendo preferencias por los hábitats del tipo rocosos.
Tesis
APA, Harvard, Vancouver, ISO, and other styles
6

Benavides, Edgar. "Evolution in Neotropical Herpetofauna: Species Boundaries in High Andean Frogs and Evolutionary Genetics in the Lava Lizard Genus Microlophus (Squamata: tropiduridae): A History of Colonization and Dispersal." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1652.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Microlophus"

1

"Urban and Community Fisheries Programs: Development, Management, and Evaluation." In Urban and Community Fisheries Programs: Development, Management, and Evaluation, edited by Kevin Meneau. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781934874042.ch18.

Full text
Abstract:
<em>Abstract.-</em>The St. Louis Urban Fishing Program (UFP) was established in 1969 to provide close-to-home fishing opportunities for urban anglers in St. Louis, Missouri through regular fish stockings at five lakes, totaling 8.4 hectares. Urban Fishing Clinics (UFC) were added for children and therapeutic patients in 1971 and 1979, respectively. Since 1973, UFP has been funded and administered by the Missouri Department of Conservation (MDC) with cooperation from municipal partners. Stocking rate, stocking schedule, and fishing regulation changes were made in the early 1990s. Since 1993, Community Assistance Program agreements have enabled MDC to improve UFP lake habitats and amenities. Subsequently, similar urban fishing programs have developed in Kansas City, St. Joseph, Sedalia, and Springfield, Missouri. Sportfish lakes are stocked with common carp <em>Cyprinus carpio</em>, channel catfish <em>Ictalurus punctatus</em>, hybrid sunfish <em>Lepomis macrochirus </em>x <em>L. cyanellus</em>, brown trout <em>Salmo trutta</em>, and rainbow trout <em>Oncorhynchus mykiss </em>from MDC hatcheries and commercial sources to create year-round angling opportunities. Annual fish stockings average up to 263 kg/ha, with a total of 1,119,105 kg since 1969. Completion of habitat improvement projects and subsequent successful natural reproduction of sportfish have allowed nine UFP lakes to provide additional opportunities for bluegill <em>Lepomis macrochirus</em>, largemouth bass <em>Micropterus salmoides</em>, redear sunfish <em>Lepomis microlophus</em>, and white crappie <em>Pomoxis annularis</em>. The UFC lakes are stocked with hybrid sunfish and channel catfish, averaging 152 kg/ha, with a total of 26,771 kg since 1978, and offer fishing program opportunities from April through October. In 2007, UFP lakes consist of 20 sportfish and six UFC lakes, totaling 30.1 hectares. All sportfish and most UFC lakes are partner-owned and located in municipal parks. Annual fishing pressure ranges from 439 to 12,019 h/ha and averages 109,470 trips/ year. Over 48,000 children and therapeutic patients have attended UFC since their inception; however, UFC impacts to angler recruitment and knowledge of aquatic conservation are unknown. So, a new program, GO FISH! was launched in 2007.
APA, Harvard, Vancouver, ISO, and other styles
2

"Balancing Fisheries Management and Water Uses for Impounded River Systems." In Balancing Fisheries Management and Water Uses for Impounded River Systems, edited by Jeffrey W. Quinn and Robert L. Limbird. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781934874066.ch12.

Full text
Abstract:
<em>Abstract</em>.—We evaluated long-term fisheries data relative to a range of perturbations for the Arkansas River from 1970 to 2006. Rotenone sample sites were located at pool 13 (Garrison Creek), Ozark Lake (Lavaca), and Lake Dardanelle (Panther Cove and the Arkansas Nuclear 1 Effluent Bay). The period of record was 24 years for Garrison Creek and Lavaca, 29 years for Effluent Bay, and 30 years for Panther Cove. Mean total fish biomass ranged between 466 kg/ha and 1,601 kg/ha among sites, and no temporal trends were detected for total biomass. Invasion of zebra mussels <em>Dreissena polymorpha</em>, discovery of largemouth bass virus, and imposition of a 381 mm total length (TL) minimum length limit for largemouth bass <em>Micropterus salmoides </em>likely contributed to notable changes in these fisheries during the past 30 years. Biomass of redear sunfish <em>Lepomis microlophus</em>, freshwater drum <em>Aplodinotus grunniens</em>, and blue catfish <em>Ictalurus furcatus </em>increased in association with the invasion of the river by nonnative zebra mussels. Spotted gar <em>Lepisosteus oculatus </em>and paddlefish <em>Polyodon spathula </em>biomass increased, and common carp <em>Cyprinus carpio </em>biomass declined coincident with the zebra mussel invasion. Large-scale sedimentation of aquatic habitats may have been related to observed declines of backwater-oriented species, especially common carp and spotted gar. The frequency of largemouth bass between 350 and 400 mm TL increased in electrofishing samples after the imposition of a 381-mm-TL minimum length limit, and total catch per hour of largemouth bass greater than 381 mm TL increased. Our associations would suggest that the discovery of largemouth bass virus during 2000 contributed to (1) lower electrofishing catch per hour of largemouth bass greater than 533 mm TL, and (2) an average increase of 420 h required for an angler to catch a 2.27-kg largemouth bass. We anticipate further changes in the Arkansas River during the next decade from the biological invasions of white perch <em>Morone americana</em>, bighead carp <em>Hypophthalmichthys nobilis</em>, and silver carp <em>H. molitrix</em>; increased establishment of aquatic vegetation; and accelerated loss of aquatic habitats associated with planned federal navigation channel improvements.
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography