IF 0.1 4区生物学

GAYANA Pub Date : 2020-06-30 DOI: 10.4067/s0717-65382020000100037

C. Chávez-Villavicencio, M. Rivadeneira

{"title":"Wintry habitat selection of the Zapallaren tree iguana (Liolaemus zapallarensis, Müller & Hellmich, 1933) and its abundance in Changa beach, Coquimbo, northern Chile","authors":"C. Chávez-Villavicencio, M. Rivadeneira","doi":"10.4067/s0717-65382020000100037","DOIUrl":"https://doi.org/10.4067/s0717-65382020000100037","url":null,"abstract":"Urban development modifies the habitat of reptiles where we expect, the individuals to select available sites with the quality necessary for their permanence. The aim of this study was to determine the variables that favored the habitat selection and abundance of The Zapallaren Tree Iguana Liolaemus zapallarensis, an endemic species of Chile, during a winter season in Changa beach, Coquimbo, in northern Chile. Between June and September 2017, we made 30 random visits to 18 plots of 900 m2 each. We estimated a resource selection probability function for presence-absence and abundance data using local habitat (e.g. slope, distance from the protection wall to the sea at low tide, interior height of the wall, mean height of the vegetation, rocky surface, and vegetal surface) and climatic variables (temperature, atmospheric pressure, direction and wind speed, solar radiation, and mean cloudiness) as predictors. Vegetation cover was the most important habitat variable explaining the presence of L. zapallarensis. In addition, increase in cloudiness and wind speed decreased the probability of selection. Manly’s selectivity measure varied according to the established home ranges and the availability ratios within them. Finally, increase in cloudiness and wind speed decreased the abundance. Overall, our results show that the characteristics related to habitat and local climate influences the resource selection that favors the survival of reptiles. This work shows that beach sectors in urban contexts under anthropic pressure have important available resources that favor the presence and abundance of reptiles.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41399846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Post-embryonic development and life table parameters of Neoseiulus californicus on Tetranychus desertorum and Panonychus citri (Acari: Phytoseiidae, Tetranychidae) under laboratory conditions 加利福尼亚新叶螨在实验室条件下对荒漠叶螨和柠檬叶螨（Acari：Phytoseidae，Tetranychide）的胚胎后发育和生命表参数

IF 0.1 4区生物学

GAYANA Pub Date : 2020-06-30 DOI: 10.4067/s0717-65382020000100054

V. Mercado, Eliana Rojas Loyola, Tommy Rioja Soto

{"title":"Post-embryonic development and life table parameters of Neoseiulus californicus on Tetranychus desertorum and Panonychus citri (Acari: Phytoseiidae, Tetranychidae) under laboratory conditions","authors":"V. Mercado, Eliana Rojas Loyola, Tommy Rioja Soto","doi":"10.4067/s0717-65382020000100054","DOIUrl":"https://doi.org/10.4067/s0717-65382020000100054","url":null,"abstract":"The postembryonic development, and life table parameters of the Neoseiulus californicus were studied under laboratory conditions in order to evaluate the potentiality of this depredator for feeding on two phytophages mites Tetranychus desertorum (desert spider mite) and Panonychus citri (red spider mite). Tetranychus desertorum and P. citri may be considered as optimal food for N. californicus, which obtained survival rates of 100 %, on them. The time of the postembryonic development was significantly different (p < 0.05) between both diets. The periods of ovoposition, postoviposition and longevity of the N. californicus were 17.17; 4.37 and 22.53 days, respectively, fed with T. desertorum, and 14.84; 5.23 and 21.06 days, respectively, fed with P. citri. The demographic parameters of N. californicus obtained fed with T. desertorum and P. citri were: intrinsic rate of increase (rm) = 0.269±0.004 and 0.307±0.004, mean generation time (T) = 12.847±0.185 and 10.791±0.142, net reproductive rate (Ro) = 31.792±1.478 and 27.352±1.187, finite rate of increase (λ) = 1.309±0.006 and 1.359±0.006, respectively. The high values of rm and λ registered for N. californicus under experimental conditions are indicators of control potential that this phytoseiid presented as a predator over these phytophages mites.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49463623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sobre el estatus taxonómico de Liolaemus islugensis Ortiz y Marquet, 1987 (Squamata: Liolaemidae) 关于Liolaemus islugensis Ortiz和Marquet的分类地位，1987(鳞状目:Liolaemidae)

IF 0.1 4区生物学

GAYANA Pub Date : 2020-06-01 DOI: 10.4067/s0717-65382020000100083

M. Gamboa, J. Ortiz

引用次数: 0

Assessing climatic and intrinsic factors that drive arthropod diversity in bird nests 评估驱动鸟巢节肢动物多样性的气候和内在因素

IF 0.1 4区生物学

GAYANA Pub Date : 2020-06-01 DOI: 10.4067/s0717-65382020000100025

Gastón O. Carvallo, Manuel López-Aliste, Mercedes Lizama, Natali Zamora, Giselle Muschett

{"title":"Assessing climatic and intrinsic factors that drive arthropod diversity in bird nests","authors":"Gastón O. Carvallo, Manuel López-Aliste, Mercedes Lizama, Natali Zamora, Giselle Muschett","doi":"10.4067/s0717-65382020000100025","DOIUrl":"https://doi.org/10.4067/s0717-65382020000100025","url":null,"abstract":"Bird nests are specialized structures that act as microrefuge and a source of food for arthropods. Nest arthropod richness and composition may vary according to the nest builder, geographical location and nest size. Because information on nest arthropods is scarce, there are even fewer studies on the drivers of nest arthropod diversity. We characterized arthropod diversity in cup- and dome-shaped nests along a 130 km latitudinal gradient in the mediterranean-type region of Central Chile and, we assessed whether nest dimensions and climatic factors explain richness (alpha-diversity). Then, we evaluated whether climatic differences between sites explain arthropod nest composition (beta-diversity). All collected nests hosted at least one arthropod specimen. We identified 43 taxonomic entities (4.2 entities per nest ± 0.5, mean ± SE, n = 27 nests) belonging to 18 orders and five classes: Arachnida, Diplopoda, Entognatha, Insecta and Malacostraca. We observed differences in nest arthropod richness and composition related to sites but not bird species. Larger nests supported greater arthropod richness. Furthermore, we observed that climatic differences explain the variation in arthropod composition between sites. Nests in the northern region (drier and warmer) mainly hosted Hemipterans and Hymenopterans. Contrary, nests in the southern region (humid and colder) hosted species of Collembola, Dermaptera, and Diplopoda. Positive relationship between nests surface area with arthropod richness suggests us that larger nests may keep more resources. Our study sheds light on a crucial interaction which may have potential consequences for insect assemblage composition and bird reproductive biology.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70347115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

PROF. Dr. TREVOR PLATT Q.D.E.P. (1942-2020) Dr. TREVOR PLATT Q.D.E.P.教授(1942-2020)

IF 0.1 4区生物学

GAYANA Pub Date : 2020-06-01 DOI: 10.4067/s0717-65382020000100089

Renato Quiñones Bergeret, Osvaldo Ulloa Quijada

引用次数: 0

TRANSLOCACION DE PECES NATIVOS EN LA CUENCA DEL RIO LAJA (REGION DEL BIOBIO, CHILE) LAJA河流域本地鱼类的迁移(智利BIOBIO地区)

IF 0.1 4区生物学

GAYANA Pub Date : 2020-02-17 DOI: 10.4067/S0717-65382002000200012

E. Habit, P. Victoriano, O. Parra

{"title":"TRANSLOCACION DE PECES NATIVOS EN LA CUENCA DEL RIO LAJA (REGION DEL BIOBIO, CHILE)","authors":"E. Habit, P. Victoriano, O. Parra","doi":"10.4067/S0717-65382002000200012","DOIUrl":"https://doi.org/10.4067/S0717-65382002000200012","url":null,"abstract":"Con el objetivo de conservar la fauna ictica nativa y como medida de mitigacion al impacto generado por la interrupcion del libre desplazamiento de peces en el rio Laja (Region del Biobio), se llevo a cabo un programa de translocacion de peces nativos. Entre los anos 1997 y 2000 se estudio la composicion y estructura comunitaria y poblacional de la ictiofauna del area, determinando la necesidad de transferir ejemplares de tres especies nativas con problemas de conservacion: Diplomystes nahuelbutaensis, Trichomycterus areolatus y Percilia irwini. La campana de translocacion se llevo a cabo en enero de 2001, capturando un total de 1835 ejemplares, de los cuales 1.653 se reubicaron vivos. La sobrevivencia obtenida en las tres especies fue alta durante las tres etapas de la campana (toma de datos, mantencion y traslado), siendo superior al 90% en cada una de ellas. Se capturaron 852 ejemplares de P. irwini y se translocaron 760; 643 individuos de T. areolatus, de los cuales se reubicaron 591 y 340 de D. nahuelbutaensis, de los que se transfirieron 302. En las tres especies la mayor mortalidad ocurrio en los estados juveniles. Tanto T. areolatus como P. irwini, presentaron mayor mortalidad durante la toma de datos (peso y longitud), en tanto que D. nahuelbutaensis resulto mas sensible al traslado. En todos los casos esta mortalidad por etapa fue inferior al 7%. Para aumentar la eficiencia de esta estrategia de conservacion se sugiere: (a) evitar la extraccion de ejemplares juveniles, (b) eliminar la etapa de toma de datos de cada individuo capturado (c) reducir el tiempo de mantencion de los peces en recipientes aireados, y (d) transportar los ejemplares en bajas densidades por contenedor","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2020-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47522474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Conservación en la ciudad: ¿Cómo influye la estructura del hábitat sobre la abundancia de especies de aves en una metrópoli latinoamericana? 城市保护:在拉丁美洲大都市，栖息地结构如何影响鸟类物种的丰度?

IF 0.1 4区生物学

GAYANA Pub Date : 2019-12-31 DOI: 10.4067/s0717-65382019000200114

Javiera F. Benito, M. Escobar, Nélida R. Villaseñor

{"title":"Conservación en la ciudad: ¿Cómo influye la estructura del hábitat sobre la abundancia de especies de aves en una metrópoli latinoamericana?","authors":"Javiera F. Benito, M. Escobar, Nélida R. Villaseñor","doi":"10.4067/s0717-65382019000200114","DOIUrl":"https://doi.org/10.4067/s0717-65382019000200114","url":null,"abstract":"A paucity of ecological research in urban ecosystems in Latin America limits the management of urban areas for biodiversity conservation. In addition, the majority of previous ecological studies in cities have focused on parks, ignoring most part of urban ecosystems. To provide robust scientific evidence for the management of urban areas for bird conservation, we investigate the influence of habitat variables on the abundance of native and exotic bird species in Santiago, Chile. During the reproductive season of 2017-2018, we surveyed birds and habitat variables at 455 points distributed throughout the city. We fit generalized linear models to evaluate the influence of habitat variables on individual bird species abundance. In 905 bird counts, we recorded 35 bird species (31 native and 4 exotic). The abundance of native birds (Zenaida auriculata, Elaenia albiceps, Troglodytes aedon, Turdus falcklandii, Zonotrichia capensis and Molothrus bonariensis) increased with woody vegetation cover. Points with greater shrub cover in the microhabitat exhibited a greater abundance of T. falcklandii, Z. capensis and E. albiceps. In contrast to the response of native birds, the abundance of exotic species (Columba livia and Passer domesticus) decreased with vegetation cover. Our results demonstrate the importance of woody vegetation to conserve native bird species in Santiago. Management of habitat that (1) avoids the loss of woody vegetation and (2) aims to increase trees and shrubs in urban areas with low vegetation cover will promote a greater abundance of native birds.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43838360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Bacterial exopolysaccharides from extreme marine habitat of Southern Ocean: Production and partial characterization 来自南大洋极端海洋栖息地的细菌胞外多糖:生产和部分特性

IF 0.1 4区生物学

GAYANA Pub Date : 2019-12-01 DOI: 10.4067/s0717-65382019000200126

A. Banerjee, Pratibha Gupta, V. Nigam, R. Bandopadhyay

{"title":"Bacterial exopolysaccharides from extreme marine habitat of Southern Ocean: Production and partial characterization","authors":"A. Banerjee, Pratibha Gupta, V. Nigam, R. Bandopadhyay","doi":"10.4067/s0717-65382019000200126","DOIUrl":"https://doi.org/10.4067/s0717-65382019000200126","url":null,"abstract":"Deep marine microorganisms survive under extreme ecological settings and harsh environmental conditions of low temperature, high salinity, and high atmospheric pressure making it significant of scientific interest. Southern Ocean (SO) is one such example of deep marine ecosystem and the microorganisms inhabiting in such hostile environment may produce different bioactive secondary metabolites. SO (Indian Sector) is relatively less documented in terms of microbial composition and community dynamics. The present study involves isolation of exopolysaccharides (EPSs) from three potent SO (Indian Sector) bacteria, optimization of the EPS production and partial characterization of them. Three different EPSs show varying structural conformation, that is from porous to strong flakes mimicking polymeric structure with C/N ratio ranging between 4 - 11. FTIR spectra have exhibited the presence of different active groups of carbohydrate moieties, water molecules and protein-associated amides. EPSs produced by marine microorganisms show high biotechnological promises such as drug carrier in pharmaceutical field, emulsifier and cryo-protectant in food-processing industry, detoxification of petrochemical oils and much more. The three bacterial isolates in this study showed potential of producing EPS biopolymer that can be further explored in terms of its proper biotechnological applications.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Real and potential distribution of the hyperparasitoid genus Mesochorus Gravenhorst (Ichneumonidae: Mesochorinae) in Brazil 高寄生虫属Mesochorus Gravenhorst在巴西的真实和潜在分布（伊蚊科：Mesochorinae）

IF 0.1 4区生物学

GAYANA Pub Date : 2019-12-01 DOI: 10.4067/s0717-65382019000200135

R. Araújo, Rubén Garrido, J. N. Mesquita‐Neto, V. Monzón

引用次数: 2

Selección de presas por perros callejeros en el humedal Estero Culebrón (Coquimbo, Chile) Estero Culebrón湿地（智利科昆博）流浪狗选择猎物

IF 0.1 4区生物学

GAYANA Pub Date : 2019-12-01 DOI: 10.4067/s0717-65382019000200102

Víctor Bravo-Naranjo, Randall R. Jiménez, Carlos Zuleta, J. Rau, Pablo Valladares, César Piñones

引用次数: 2

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