|
|
|
| Registros recuperados: 46 | |
|
|
| Martínez García, José Antonio. |
| Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por... |
|
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/426 |
| |
|
|
| Martínez García, José Antonio. |
| Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por... |
|
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/426 |
| |
|
|
| Martínez García, José Antonio. |
| Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por... |
|
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/426 |
| |
|
|
| Martínez García, José Antonio. |
| Este estudio se desarrolló del invierno 2003-2004 al invierno del 2004-2005 en el Parque Nacional Izta-Popo, Zoquiapan y Anexas, en sitios con presencia de este conejo fueron denominados como Altzomoni (AL), El Pinar (EP), El Arco (EA), y El Papayo (PA) y tuvo como objetivos el estimar la densidad, el uso del hábitat, y evaluación del hábitat y de la dieta. Se estimó el tamaño poblacional, la densidad y la determinación del ámbito hogareño y cambios de éstas, bajo distintos tipos de unidades ambientales a lo largo del año. El uso de hábitat Este se determinó por medio de la selección de comunidades vegetales, porcentaje de cada uno de los componentes de la cobertura del hábitat, además se estableció el efecto de la perturbación del hábitat, ya sea por... |
|
Palavras-chave: Romerolagus diazi; Densidad; Uso de hábitat; Perturbación; Dieta; Capacidad nutricional de carga; Density; Habitat use; Perturbation; Diet; Nutritional carrying capacity; Doctorado; Ganadería. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/426 |
| |
|
| |
|
|
| Agostinho,Carlos S.; Marques,Elineide E.; Oliveira,Rafael J. de; Braz,Pollyanna S.. |
| The diet and feeding habits of armado catfish, Pterodoras granulosus (Valenciennes, 1821), were studied in the Lajeado Reservoir, Tocantins, Brazil, and the mouth of its tributaries. Stomach contents of 327 specimens were analyzed by the percentage composition and volumetric methods. The feeding of armado on a wide variety of foods, including both animal and plant items, leads to its classification as a euriphagic species with herbivorous tendency. However, it should be noted that armado showed a strong ontogenetic diet shift, with the gradual replacement of detritus and sediment by plant items, especially terrestrial ones. The environmental use pattern of P. granulosus corroborates the ontogenetic shift observed in its diet. Small fish predominated mainly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding habits; Seasonal shift; Ontogenetic shift; Habitat use. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000300012 |
| |
|
| |
|
| |
|
|
| Galdino,Conrado A. B.; Carvalho Jr.,Ronald R.; Menezes,Mauren A. V. Noronha e; Nascimento,Luciana B.. |
| We studied the pattern of habitat use by the tree frog Scinax aff. perereca. Fieldworks were performed from August 1996 to August 1997 at Parque das Mangabeiras, Belo Horizonte, State of Minas Gerais, southeastern Brazil. Calling males were observed in September, October and December 1996, February to April and June 1997. Females were found only in October 1996. Specimens were found perched on vegetation, on the ground or on stones near waterfall. At Parque das Mangabeiras, S. aff. perereca occupied nine types of substrata. The most frequently used substrata were shrubs, stones at the stream edges, and fallen trunks. The pattern of spatial occupation varied among months. Males were found calling in aggregations on the vegetation and spatial niche breadth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hylidae; Scinax; Habitat use; Atlantic forest; Environment. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000300018 |
| |
|
|
| Bauer, Robert Klaus; Fromentin, Jean-marc; Demarcq, Herve; Bonhommeau, Sylvain. |
| We investigated the habitat utilization, vertical and horizontal behaviour of Atlantic bluefin tuna Thunnus thynnus (ABFT) in relation to oceanographic conditions in the northwestern Mediterranean Sea, based on 36 pop-up archival tags and different environmental data sets. Tags were deployed on early mature ABFT (127–255 cm) between July and November in 2007-2014, on the shelf area off Marseille, France. The data obtained from these tags provided 1643 daily summaries of ABFT vertical behaviour over 8 years of tag deployment. Based on a hierarchical clustering of this data, we could identify four principle daily vertical behaviour types, representing surface (≦10m) and subsurface (10–100 m) orientation, moderate (50–200 m) and deep (≧200m) diving behaviour.... |
| Tipo: Text |
Palavras-chave: Thunnus thynnus; Habitat use; Spike dives; Fronts; Thermal stratification; Archival tags. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00382/49329/49709.pdf |
| |
|
|
| Garrigue, C; Derville, S; Bonneville, C; Baker, Cs; Cheeseman, T; Millet, Laurent; Paton, D; Steel, D. |
| Humpback whales Megaptera novaeangliae were severely depleted by commercial whaling. Understanding key factors in their recovery is a crucial step for their conservation worldwide. In Oceania, the Chesterfield-Bellona archipelago was a primary whaling site in the 19th century, yet has been left almost unaffected by anthropogenic activities since. We present the results of the first multidisciplinary dedicated surveys in the archipelago assessing humpback whale populations 2 centuries post-whaling. We encountered 57 groups during 24 survey days (2016-2017), among which 35 whales were identified using photographs of natural markings (photo-ID), 38 using genotyping and 22 using both. Humpback whales were sparsely distributed (0.041 whales km-1): most... |
| Tipo: Text |
Palavras-chave: Chesterfield-Bellona archipelago; Connectivity; Coral Sea; Habitat use; Humpback whale; Satellite tracking; Sex ratio; Whaling. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00632/74454/74267.pdf |
| |
|
|
| Luiselli, L.; Angelici, F.M.; Di Vittorio, M.; Spinnato, A.; Politano, E.. |
| A field survey was conducted in a highly degraded barren environment in Sicily in order to investigate herpetofaunal community composition and structure, habitat use (niche breadth and overlap) and relative abundance of a snake predator and two species of lizard prey. The site was chosen because it has a simple community structure and thus there is potentially less ecological complexity to cloud any patterns observed. We found an unexpectedly high overlap in habitat use between the two closely related lizards that might be explained either by a high competition for space or through predator-mediated co-existence i.e. the prevention of the competitive exclusion of one lizard over the other. We also found a strong positive correlation between predator... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Herpetofauna; Sicily; Habitat use; Lizards; 42.82. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/214339 |
| |
|
|
| Conde-Saldaña,Cristhian C.; Albornoz-Garzón,Juan G.; López-Delgado,Edwin O.; Villa-Navarro,Francisco A.. |
| ABSTRACT Ecomorphological patterns of the fish community were evaluated in the trans-Andean Alvarado River drainage, Colombia. A total of 29 species using 25 ecomorphological indices were analyzed to test how well the ecomorphological patterns are related to the fish assemblage. Although a significant correlation was found (Mantel test) between morphological attributes and trophic guilds, habitat use and distribution across the altitudinal gradient, only the last two were significantly independent of the phylogenetic relationships (partial Mantel test). Regarding the ecomorphological space, two main trends were defined. First, benthic periphytivores and invertivores were characterized by having dorsal or dorsolateral eyes, labial appendages, depressed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alvarado River drainage; Community ecology; Habitat use; Morphological diversity; Neotropical region. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400204 |
| |
|
| |
|
|
| Alves,Carlos Bernardo Mascarenhas; Silva,Luiz Gustavo Martins da; Godinho,Alexandre Lima. |
| Jaú, Zungaro jahu (Ihering, 1898), a large migratory catfish endemic to the rio da Prata basin, has a fragile conservation status and its ecology is poorly known. We radio-tracked a female jaú with a total length of 1.5 m that was passed upstream of Funil Dam, rio Grande, to describe its migratory movements, habitat use, linear home range, and diel activity. To track the fish, we made five tracking trips in the period from April, 2003 to January, 2004. In addition to the main body of Funil Reservoir, the fish also used a reservoir-river transition zone located in a branch of Funil Reservoir that flooded part of rio das Mortes. Most of the times, we found the fish in the former beds of streams flooded by the reservoir, at depths that ranged from 8-9 m in... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Catfish; Endangered species; Migration; Home range; Habitat use. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200018 |
| |
|
| |
|
|
| Oyanedel,Alejandra; Habit,Evelyn; Belk,Mark C.; Solis-Lufí,Katherin; Colin,Nicole; Gonzalez,Jorge; Jara,Alfonso; Muñoz-Ramírez,Carlos. P.. |
| ABSTRACT We document movement patterns and home range of Diplomystes camposensis, an endemic and threatened freshwater catfish from Chile. We tracked the movements of seven individuals of different body size (13.5 to 19 cm SL) using portable radio telemetry equipment to investigate movement patterns in relation to day/night activity and habitat use in the San Pedro River (Valdivia Basin). Tracked movements and model-based analyses revealed that D. camposensis has a large home range and high mobility. The average home range was 0.068163 ± 0.033313 km2, and the average area of higher activity was 0.005646 ± 0.011386 km2. The mean linear home range was 387.4 m. The results also showed that movements were longer during the night, supporting nocturnal habits.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endangered species; Fragmentation; Habitat use; Kernel; Radio telemetry. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100222 |
| |
|
|
| De Fries,Lucas; Hahn,Lisiane; Meneses,Bruna Arbo; Câmara,Luís Fernando da; Becker,Fernando Gertum; Hartz,Sandra Maria. |
| ABSTRACT We investigated whether the movement and distribution of the migratory fish, Salminus brasiliensis, were affected by a small reservoir. We also examined how movement and distribution were related to water temperature, flow, and rainfall. In December 2011 and January 2012, 24 individuals were captured downstream from the dam, tagged with radio transmitters and released in the reservoir (5.46 km² total area). After being released in the reservoir, 18 of the 24 tagged fish travelled upstream, taking an average of 16.6 days to leave the reservoir, with daily movements varying from < 5 km/day to > 24 km/day. However, only seven tagged specimens (29.16%) returned to the lower reservoir section, while the rest remained in the intermediate and upper... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environmental impact; Fragmentation; Habitat use; Hydroelectric power; Radio telemetry. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300202 |
| |
|
|
| Rosa,Ierecê Lucena; Oliveira,Tacyana P. R.; Castro,André L. C.; Moraes,Luiz E. de Souza; Xavier,Josias H. A.; Nottingham,Mara C.; Dias,Thelma L. P.; Bruto-Costa,Leonardo V.; Araújo,Maria E.; Birolo,Alesandra B.; Mai,Ana C. G.; Monteiro-Neto,Cassiano. |
| This paper provides a case study of a threatened seahorse species, Hippocampus reidi, highlighting the importance of using ecological information to assist conservation and management initiatives. Underwater visual sighting data (50 x 2m transect) gathered along the NE, SE and S portions of the Brazilian coast revealed an unequal distribution across localities, perhaps related to harvesting pressure, and a mean density of 0.026 ind.m-2. Our findings suggest some restricted spatial use by H. reidi, which was consistent with its estimated home range, and with re-sighting of specimens. Reproduction was recorded year-round, however productive peaks may exist. Components of habitat structure mostly used as anchoring points were mangrove plants, macroalgae,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Longsnout seahorse; Mangrove; Habitat use; Population structure; Brazil; Conservation. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300020 |
| |
|
| |
| Registros recuperados: 46 | |
|
|
|
