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Search Results: 1 - 10 of 5208 matches for " Lopeztegui Castillo "
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Contenido estomacal de langostas Panulirus argus (Decapoda: Palinuridae) en playa El Holandés, Sur de la Península de Guanahacabibes, Cuba - Stomach content of lobsters Panulirus argus (Decapoda: Palinuridae) in El Holandés beach, Southern of Peninsula of Guanahacabibes, Cuba
Lopeztegui Castillo, Alexander,Capetillo Pi?ar, Norberto
REDVET , 2012,
Abstract: ResumenCon el objetivo de determinar la composición de la dieta natural de Panulirus argus (Latreille 1804), se realizó, durante los meses de julio-agosto del período 2004-2006, el análisis del contenido estomacal de ejemplares capturados in situ en el área protegida de playa El Holandés, al sur de La Península de Guanahacabibes, Pinar del Río.Abstract To determine the composition of the natural diet of Panulirus argus (Latreille 1804) lobsters, it was made, during the months of july-august (2004-2006), the analysis of the stomach content of lobsters captured in situ in the El Holandés beach, a protected beach in the south of Guanahacabibes Peninsula, Pinar del Río.
Variaciones en la condición nutricional de langostas Panulirus argus (Decapoda: Palinuridae) en la región este del Golfo de Batabanó, Cuba Variations of the nutritional condition of lobsters Panulirus argus (Decapoda: Palinuridae) in Eastern region of the Gulf of Batabanó, Cuba
Alexander Lopeztegui Castillo,Norberto Capetillo Pi?ar,Abel Betanzos Vega
Revista de Biología Tropical , 2012,
Abstract: En Cuba, la región del Golfo de Batabanó es la más importante zona de pesca de langosta debido a que de ella se extrae anualmente alrededor del 70% de la captura nacional. Con el objetivo de determinar variaciones espacio-temporales en la condición nutricional (K) de langostas Panulirus argus del Golfo de Batabanó, Cuba, se calculó dicha condición mediante una relación pesolargo (K=Pt/Lt), para lo que se utilizaron ejemplares de cuatro zonas (uno, dos, cuatro y cinco) del este del golfo, capturados en los a os 1981 y 2010. Se encontró que en todos los casos analizados la condición nutricional fue significativamente mayor en machos que en hembras. Se detectaron variaciones significativas entre zonas en 1981 y 2010. También entre a os el estado nutricional de las langostas presenta variaciones significativas, de manera que en 1981 (2.34±0.84g/mm) fue mayor que en 2010 (1.96±0.49g/mm). Tanto las variaciones interzonales como las interanuales parecen estar relacionadas con variaciones reportadas en el tipo de fondo y la cobertura vegetal. Variaciones estacionales en la abundancia y distribución de organismos bentónicos que constituyen alimento para las langostas también podrían estar influyendo. Las diferencias entre sexos en cambio, se suponen consecuencia de la metodología utilizada y del dimorfismo sexual característico de esta especie, por cuanto otros métodos de estimación de K que no involucran mediciones morfométricas, no detectan estas diferencias. Variations of the nutritional condition of lobsters Panulirus argus (Decapoda: Palinuridae) in Eastern region of the Gulf of Batabanó, Cuba. Nutritional condition can affect survival and growth rate of crustaceans, and this is mostly affected by habitat conditions. This study describes the space-temporary nutritional changes in this commercially important species. With this aim, the variations in the nutritional condition (K) of lobsters from four zones (1, 2, 4 and 5) in the Gulf of Batabanó, Cuba, were determined. For this, the weight/length ratio (K=Pt/Lt) was calculated using animals captured in 1981 and 2010. The nutritional condition between areas and sexes, and years and sexes, was contrasted by a bifactorial ANOVA, and the overall length and weight of lobsters were compared using a t-Test for independent samples and unifactorial ANOVA. It was found that the nutritional condition was significantly greater in males than in females. In addition, significant variations between zones were detected for both years. Nutritional condition of lobsters from Zone five was the highest for 1981, while it was Zon
Reclutamiento de corales pétreos en arrecifes coralinos a diferentes distancias de fuentes de contaminación en La Habana, Cuba Stony coral recruitment in coral reefs at different distances from pollution sources in Habana, Cuba
Pedro Alcolado-Prieto,Hansel Caballero Aragón,Pedro M. Alcolado,Alexander Lopeztegui Castillo
Revista de Biología Tropical , 2012,
Abstract: El efecto de la contaminación sobre el reclutamiento ha sido insuficientemente estudiado. Este trabajo trata el tema del reclutamiento en sitios ubicados a diferentes distancias de dos importantes fuentes de contaminación. Se caracterizó la composición y estructura de las asociaciones de reclutas de corales pétreos (escleractinios y milepóridos) al oeste de la Ciudad de La Habana, Cuba. Esta área está influenciada por la contaminación urbana del río Almendares y del emisario submarino construido en su desembocadura. El objetivo de esta investigación fue determinar las variaciones en la densidad y predominio de las especies de reclutas, en sitios ubicados a diferentes distancias de fuentes de contaminación, en distintas épocas de un a o. Se muestreó cada tres meses entre julio 2007- mayo 2008. Se escogieron cuatro sitios de muestreo cerca del borde superior del escarpe del arrecife frontal a 10m de profundidad. Se utilizó un marco cuadrado de 25cm de lado de forma aleatoria-sistémica para determinar la densidad y composición taxonómica de reclutas de corales pétreos (colonias menores de 3cm). Para comparar las densidades medias entre sitios y fechas de muestreo se aplicó un análisis de varianza bifactorial. Para comparar los pares de densidades medias se empleó la prueba de Student-Newman-Keuls. La aplicación de un análisis Clasificación Numérica Jerárquica Aglomerativa (Cluster Analysis) y uno de ordenamiento por Escalado Multidimensional no Métrico (nMDS) mostró una distribución en la que los sitios quedaron agrupados en función de sus distancias de las fuentes contaminantes. Predominó Siderastrea sidérea seguida por Siderastrea radians y Porites asteroides. Durante el a o de muestreo, las densidades de reclutas fueron similares entre La Puntilla, Calle 16 y Acuario. Las menores densidades se observaron siempre en Malecón. Se encontraron diferencias significativas entre las densidades medias de los sitios, así como entre de las distintas fechas de muestreo. El análisis de variancia bifactorial no mostró interacción significativa espacio-tiemporal. Malecón, sitio más contaminado, presentó menor reclutamiento y mayor presencia de especies consideradas indicadoras de contaminación orgánica, sedimentación y abrasión. Las densidades fueron mayores en Octubre 2007 y menores en Mayo 2008, al parecer influenciados por las épocas de reproducción y la acción de los frentes fríos respectivamente. El mayor predominio y abundancia de reclutas de S. siderea, S. radians y P. astreoides parece responder a sus elevados potenciales reproductivos y altas resistencias a di
Influencia del ciclo lunar en la captura de langosta espinosa Panulirus argus (Decapoda: Palinuridae) en el Golfo de Batabanó, Cuba
Lopeztegui,Alexander; Baisre,Julio A; Capetillo,Norberto;
Revista de Biología Tropical , 2011,
Abstract: influence of lunar cycle on catches of spiny lobster panulirus argus (decapoda: palinuridae) in the gulf of batabanó, cuba. many biological processes such as reproductive and migratory behaviours have been associated with moon cycles. in this study, the nocturnal light levels associated with lunar cycle (int) were correlated with daily catch rate of lobster p. argus, during seven lunar months of 2002 fishing period, to determine a possible relationship between these variables. the lobster catches were obtained from three fishing companies that develop their activities in the gulf of batabanó: epicol that fishes in coloma area; pescahabana in batabanó area and pescaisla in isla area. daily catch per boat (cdb) was used as a measurement of daily catch variations (catch rate). the correlation was analyzed showing it in chronological graphs based on average of cdb per lunar phases, comparing lobster catch rate per lunar phases -with the kruskal-wallis test-. spearman rank correlation coefficient and cross correlation techniques were also applied. similarities between lobster catch rate and the lunar cycle were not found. spearman rank correlation coefficient was modularly smaller than 0.1 in all cases and demonstrated quantitatively that correlation between cdb and int does not exist. kruskal-wallis test detected differences only in batabanó area but not when making the analyses for the whole gulf of batabanó. finally, the cross correlations do not detected significance in any zone, as well. it is concluded that, in opposition to what other authors have reported, the catch rates of p. argus and the lunar cycle did not show significant correlation in the gulf of batabanó. this trend was independent of the fishing art, which varied according to the time of the year that was analyzed. rev. biol. trop. 59 (1): 207-216. epub 2011 march 01.
Influencia del ciclo lunar en la captura de langosta espinosa Panulirus argus (Decapoda: Palinuridae) en el Golfo de Batabanó, Cuba
Alexander Lopeztegui,Julio A Baisre,Norberto Capetillo
Revista de Biología Tropical , 2011,
Abstract: Muchos procesos biológicos tales como los comportamientos reproductivos y migratorios se han asociado con los ciclos de la luna. Con el objetivo de determinar la relación entre las capturas de langosta espinosa Panulirus argus (Decapoda: Palinuridae) y el ciclo lunar, en la zona del Golfo de Batabanó, se correlacionaron los niveles de iluminación nocturna del ciclo lunar (INT) con la captura diaria por barco (CDB) durante siete meses lunares correspondientes al período de pesca del 2002. Los datos de captura provinieron de las tres empresas pesqueras que realizan su actividad en la zona del Golfo de Batabanó. La relación entre el ciclo lunar y las capturas de langostas fue examinada mediante varios procedimientos estadísticos. Los primeros gráficos realizados, cualitativos, mostraron que no existe relación entre las tasas de captura y el ciclo lunar. Los coeficientes de Spearman calculados, modularmente menores que 0.1 en todos los casos, demostraron cuantitativamente que no existe correlación entre las mencionadas variables. La prueba de Kruskal-Wallis detectó diferencias sólo en una de las tres áreas estudiadas. Las correlaciones cruzadas no detectaron significación en ninguna de las zonas, con coeficientes de correlación cruzada modularmente inferiores a 0.1. A diferencia de lo reportado por otros autores, las capturas de P. argus y el ciclo lunar no presentan correlación significativa en el Golfo de Batabanó. Influence of lunar cycle on catches of spiny lobster Panulirus argus (Decapoda: Palinuridae) in the Gulf of Batabanó, Cuba. Many biological processes such as reproductive and migratory behaviours have been associated with moon cycles. In this study, the nocturnal light levels associated with lunar cycle (INT) were correlated with daily catch rate of lobster P. argus, during seven lunar months of 2002 fishing period, to determine a possible relationship between these variables. The lobster catches were obtained from three fishing companies that develop their activities in the Gulf of Batabanó: EPICOL that fishes in Coloma area; PESCAHABANA in Batabanó area and PESCAISLA in Isla area. Daily catch per boat (CDB) was used as a measurement of daily catch variations (catch rate). The correlation was analyzed showing it in chronological graphs based on average of CDB per lunar phases, comparing lobster catch rate per lunar phases -with the Kruskal-Wallis test-. Spearman rank correlation coefficient and cross correlation techniques were also applied. Similarities between lobster catch rate and the lunar cycle were not found. Spearman rank correlation c
Influence of Rainfall Pattern in the Seasonal Variation of Fish Abundance in a Tropical Estuary with Restricted Marine Communication  [PDF]
Manuel Castillo-Rivera
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.53A032
Abstract:
Pueblo Viejo Lagoon is an estuary with restricted communication with the sea, so the freshwater influence tends to be more important. Therefore, the study focused on testing the hypothesis that the seasonal changes in species abundance would be mainly related to the local rainfall pattern. Monthly samplings were carried out over a one-year, using a seine net. A total of 9108 individuals were caught, corresponding to 66 species of fish, most of them with marine origin. Canonical correspondence analysis revealed that the rainfall-salinity gradient was revealed to be the most important driving force in the seasonal variation of fish composition. In this way, it was observed that seasonal fluctuations in total fish number were linked to preceding fluctuations (one month) in local rainfall. Similar pattern was exhibited by the abundance of Anchoa mitchilli (the most abundant species), Oreochromis mossambicus and Ariopsis felis, and this delayed effect was significant (cross-correlation analyses). In addition, the rainfall showed a direct influence (significant positive correlations) on abundance of D. auratus and M. martinica. The association between fish number and the rainfall regime seems to be related to lagoon productivity and the trophic responses of these species. By contrast, Brevoortia gunteri and Menidia beryllina showed an inverse correlation with rainfall. Other environmental variables (also influenced by rainfall regime) showed a significant relationship with A. hepsetus (salinity), B. chrysoura (depth) and M. curema (turbidity). Thus, at least 12 species showed some relationship with local rainfall, which accounted for 81.27% of the total number of fish collected. Although it is difficult to separate the relative importance of
Mobile and Nonmobile Assessment in Organizations: Does Proctoring Make a Difference?  [PDF]
Matthew S. Castillo, Raymond Doe
Psychology (PSYCH) , 2017, DOI: 10.4236/psych.2017.86057
Abstract: Advancements in technology have allowed for more efficient methods of testing and assessment. In particular, remotely delivered assessments can be taken on mobile or nonmobile devices in addition to traditional pencil and paper tests. This has led to an increased interest in the comparability of mobile and nonmobile devices on performance outcomes. A variable to consider in performance outcomes on a mobile or nonmobile device is proctoring. There is evidence for both proctored and unproctored conditions leading to better performance outcomes. The present study compared performance on a remotely delivered assessment across mobile and nonmobile devices in proctored and unproctored conditions. Participants were randomly assigned to take a remotely delivered cognitive ability test on either a mobile or nonmobile device in a proctored or unproctored condition. Results indicated that participants tended to perform similarly regardless of the device type or proctoring. Implications are that organizations should consider testing job applicants via mobile devices because performance on a high stakes assessment tends to be similar to testing on a traditional desktop or laptop. Further validation of these results could allow companies to reduce hiring costs by remotely delivering assessments to applicants’ own devices.
Casa Gallinero: Concepción, Chile
Castillo,Eduardo;
ARQ (Santiago) , 2011, DOI: 10.4067/S0717-69962011000100007
Abstract: casa gallinero is part of a series of projects aiming to high constructive efficiency -reached mostly through the use of systematic components- resulting in the biggest space possible at minimum costs. designed basically using a single material, this proposal is a critical recover of traditional carpentry as a light, manual, affordable technology.
Casa 3 casta?os: Talca, Chile
Castillo,Eduardo;
ARQ (Santiago) , 2011, DOI: 10.4067/S0717-69962011000100008
Abstract: autoprogettazione is the name given to 19 pieces of furniture that were designed by enzo mari in 1974 using only wood strips. following the diy fashion, the author published complete drawings to stimulate its reproduction, taking distance from copyrights and industrial production but praising anonymous, hand-made production. just like in this house, common procedures not necessarily generate common results.
YAP_CONSTRUCTO 2010, SANTIAGO: Arquitecto Eduardo Castillo, 2010
Castillo,Eduardo;
ARQ (Santiago) , 2011, DOI: 10.4067/S0717-69962011000200005
Abstract: this is a program created by moma-ps1 in 2000 in new york. in its first south american version, the initiative aims to promote young talent through construction: during summer, the installation hosts music performances and open-air activities. this time it was a formless, hanging tent and its shadowy interior.
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