Factors Affecting Breeding-Site Selection of Northern Goshawks at Two Spatial Scales in Urbanized Areas

2017 ◽  
Vol 51 (4) ◽  
pp. 417-427 ◽  
Author(s):  
Haruki Natsukawa ◽  
Tomohiro Ichinose ◽  
Hiroyoshi Higuchi
Keyword(s):  
Site Selection ◽  
Spatial Scales ◽  
Breeding Site ◽  
Factors Affecting ◽  
Urbanized Areas ◽  
Northern Goshawks ◽  
Selection Of

scholarly journals Factors affecting nest-site selection of Sabine's Gulls in the eastern Canadian Arctic

2005 ◽  
Vol 83 (9) ◽  
pp. 1240-1245 ◽  
Author(s):  
Iain J Stenhouse ◽  
H Grant Gilchrist ◽  
William A Montevecchi
Keyword(s):  
Site Selection ◽  
Nest Site ◽  
Nest Site Selection ◽  
Breeding Habitat ◽  
Factors Affecting ◽  
Invertebrate Prey ◽  
Terrestrial Invertebrate ◽  
Individual Fitness ◽  
Sabine’S Gull ◽  
Selection Of

The selection of breeding habitat is of prime importance for individual fitness. Among birds, natural selection should favour the ability to recognize and select habitat suitable for nesting and rearing chicks. This study compares the characteristics of Sabine's Gull, Xema sabini (Sabine, 1819), nest sites with random points across a coastal tundra environment on Southampton Island, Nunavut, Canada. The availability of terrestrial invertebrate prey was also examined among habitats. Sabine's Gull nests were nonrandomly distributed in relation to vegetation, substrate, and proximity to water. Gulls nested within approximately 1 km of the coastline and selected sites with the greatest proportions of moss and standing water (i.e., they nested close to the edge of small freshwater ponds near shore). However, there were no detectable differences in characteristics between successful and unsuccessful nests within preferred habitat. The dynamics of terrestrial invertebrate prey communities varied between years, but the volume of invertebrates in Sabine's Gull nesting habitat was intermediate between the most productive habitats and the least productive habitats in both years. However, nest-site selection in Sabine's Gulls may also be influenced by the availability of aquatic invertebrates (not examined in this study) and their proximity to the marine coastline, where chicks are taken to be reared.

Breeding site selection of Bufo viridis in the city of Rome (Italy)

2003 ◽  
Vol 24 (3) ◽  
pp. 396-400 ◽  
Author(s):  
Paolo Formichetti ◽  
Alberto Sorace ◽  
Silvia Loriga ◽  
Roberto Isotti ◽  
Francesca Ensabella
Keyword(s):  
Site Selection ◽  
Breeding Site ◽  
Bufo Viridis ◽  
The City ◽  
Selection Of

scholarly journals Nest site selection of Northern Goshawks Accipiter gentilis in Nasunogahara, Tochigi Prefecture, central Japan.

2006 ◽  
Vol 55 (2) ◽  
pp. 41-47 ◽  
Author(s):  
Reiko Horie ◽  
Koichi Endo ◽  
Jun Nonaka ◽  
Hiroki Hunatsumaru ◽  
Masaaki Koganezawa
Keyword(s):  
Site Selection ◽  
Nest Site ◽  
Nest Site Selection ◽  
Accipiter Gentilis ◽  
Central Japan ◽  
Northern Goshawks ◽  
Selection Of

scholarly journals Broad-scale spatial patterns of canopy cover and pond morphology affect the structure of a Neotropical amphibian metacommunity

2013 ◽  
Author(s):  
Diogo B. Provete ◽  
Thiago Gonçalves-Souza ◽  
Michel Garey ◽  
Itamar A. Martins ◽  
Denise Rossa-Feres
Keyword(s):  
Species Composition ◽  
Water Chemistry ◽  
Spatial Patterns ◽  
Site Selection ◽  
Spatial Scales ◽  
Canopy Cover ◽  
Breeding Site ◽  
Larval Anurans ◽  
Metacommunity Structure ◽  
Broad Scale

Spatial and environmental processes influence species composition at distinct scales. Previous studies suggested that the landscape-scale distribution of larval anurans is influenced by environmental gradients related to adult breeding site selection, such as pond canopy cover, but not water chemistry. However, the combined effects of spatial, pond morphology, and water chemistry variables on metacommunity structure of larval anurans have not been analyzed. We used a partial redundancy analysis with variation partitioning to analyze the relative influence of pond morphology (e.g., depth, area, and aquatic vegetation), water chemistry, and spatial variables on a tadpole metacommunity from southeastern Brazil. We predict that the metacommunity will be spatially structured at broad spatial scales, while environmental variables, mainly related to adult habitat selection, would play a larger role at fine spatial scales. We found that broad-scale spatial patterns of pond canopy cover and pond morphology strongly influenced metacommunity structure. Additionally, species composition was spatially autocorrelated at short distances. We suggest that the reproductive behavior of adult anurans is driving tadpole metacommunity dynamics, since pond morphology, but not water chemistry affects breeding site selection by adults. Our results contribute to the understanding of amphibian species diversity in tropical environments.

scholarly journals Synergism between nonane and emanations from soil as cues in oviposition-site selection of natural populations of Anopheles gambiae and Culex quinquefasciatus

2021 ◽  
Author(s):  
Victor Saturnus Mwingira ◽  
Leonard E.G. Mboera ◽  
Willem Takken
Keyword(s):  
Synergistic Effect ◽  
Anopheles Gambiae ◽  
Culex Quinquefasciatus ◽  
Site Selection ◽  
Natural Populations ◽  
Breeding Site ◽  
Distilled Water ◽  
Oviposition Site Selection ◽  
Untreated Soil ◽  
Selection Of

Abstract BackgroundOlfactory cues have been shown to have an important role in guiding gravid mosquito females to selected sites for egg laying. The objective of this study was to determine the influence of emanations from soil from a breeding site and the putative oviposition pheromone nonane on oviposition-site selection of natural populations of Anopheles gambiae sensu lato (s.l.) and Culex quinquefasciatus.MethodsThis field-based study was conducted in Mvomero District in East-central Tanzania. In a dual-choice experimental set up, clay bowls were dug into the ground and filled with one of the following treatments: (i) distilled water + autoclaved soil (control), (ii) distilled water + soil from a natural mosquito breeding site, (iii) distilled water + nonane and (iv) distilled water + nonane + soil from a natural breeding site. Soil was dried and autoclaved or dried only before use. After five days of incubation, larvae were collected daily for 10 days. The median number of larvae per bowl per day was used as outcome measure.ResultsAutoclaved soil had a significant attractive effect on oviposition behaviour of Cx. quinquefasciatus (median values ± s.e: 8.0±1.1; P<0.005) but no effect on An. gambiae (median value ± s.e: 0.0±0.2; P = 0.18). Nonane and emanations from untreated soil significantly and positively influenced the selection of oviposition sites by both An. gambiae s.l. (median values ± s.e.: 12.0 ± 2.0 and 4.5 ± 1.5, respectively; P< 0.0001) and Cx. quinquefasciatus (median values ± s.e.: 19.0 ± 1.3 and 17.0 ± 2.0, respectively; P<0.0001). A mixture of nonane and untreated soil caused a synergistic effect on oviposition behaviour in An. gambiae s.l. (median value ± s.e.: 23.5 ± 2.5; P<0.0001) compared to either nonane (median values ± s.e.: 12.0 ± 2.0; P<0.0001) or untreated soil alone (median value ± s.e.: 4.5 ± 1.5; P<0.0001). A synergistic effect of nonane mixed with untreated soil was also found in Cx. quinquefasciatus (median value ± s.e.: 41.0 ± 2.1; P<0.0001) compared to either nonane (median value ± s.e. 19.0 ± 1.3; P<0.0001) or untreated soil alone (median value ± s.e.: 17.0 ± 2.0; P<0.0001). The oviposition activity index for An. gambiae was 0.56 (P< 0.001) and for Cx. quinquefasciatus 0.59 (P<0.0001).ConclusionThe larval pheromone nonane and emanations from breeding-site soil both induced oviposition in wild An. gambiae s.l. and Cx. quinquefasciatus, with a synergistic effect when both stimuli were present simultaneously. This is the first study in which nonane is shown to cause oviposition under natural conditions, suggesting that this compound can potentially be exploited for the management of mosquito vectors.

scholarly journals Synergism between nonane and emanations from soil as cues in oviposition‐site selection of natural populations of Anopheles gambiae and Culex quinquefasciatus

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Victor S. Mwingira ◽  
Leonard E. G. Mboera ◽  
Willem Takken
Keyword(s):  
Synergistic Effect ◽  
Anopheles Gambiae ◽  
Culex Quinquefasciatus ◽  
Site Selection ◽  
Natural Populations ◽  
Breeding Site ◽  
Distilled Water ◽  
Oviposition Site Selection ◽  
Untreated Soil ◽  
Selection Of

Abstract Background Olfactory cues have been shown to have an important role in guiding gravid mosquito females to selected sites for egg laying. The objective of this study was to determine the influence of emanations from soil from a breeding site and the putative oviposition pheromone nonane on oviposition-site selection of natural populations of Anopheles gambiae sensu lato (s.l.) and Culex quinquefasciatus. Methods This field-based study was conducted in Mvomero District in East-central Tanzania. In a dual-choice experimental set up, clay bowls were dug into the ground and filled with one of the following treatments: (i) distilled water + autoclaved soil (control), (ii) distilled water + soil from a natural mosquito breeding site, (iii) distilled water + nonane and (iv) distilled water + nonane + soil from a natural breeding site. Soil was dried and autoclaved or dried only before use. After five days of incubation, larvae were collected daily for 10 days. The median number of larvae per bowl per day was used as outcome measure. Results Autoclaved soil had a significant attractive effect on oviposition behaviour of Cx. quinquefasciatus (median values ± s.e: 8.0 ± 1.1; P < 0.005) but no effect on An. gambiae (median value ± s.e: 0.0 ± 0.2; P = 0.18). Nonane and emanations from untreated soil significantly and positively influenced the selection of oviposition sites by both An. gambiae s.l. (median values ± s.e.: 12.0 ± 2.0 and 4.5 ± 1.5, respectively; P < 0.0001) and Cx. quinquefasciatus (median values ± s.e.: 19.0 ± 1.3 and 17.0 ± 2.0, respectively; P < 0.0001). A mixture of nonane and untreated soil caused a synergistic effect on oviposition behaviour in An. gambiae s.l. (median value ± s.e.: 23.5 ± 2.5; P < 0.0001) compared to either nonane (median values ± s.e.: 12.0 ± 2.0; P < 0.0001) or untreated soil alone (median value ± s.e.: 4.5 ± 1.5; P < 0.0001). A synergistic effect of nonane mixed with untreated soil was also found in Cx. quinquefasciatus (median value ± s.e.: 41.0 ± 2.1; P < 0.0001) compared to either nonane (median value ± s.e. 19.0 ± 1.3; P < 0.0001) or untreated soil alone (median value ± s.e.: 17.0 ± 2.0; P < 0.0001). The oviposition activity index for An. gambiae was 0.56 (P < 0.001) and for Cx. quinquefasciatus 0.59 (P < 0.0001). Conclusions The larval pheromone nonane and emanations from breeding-site soil both induced oviposition in wild An. gambiae s.l. and Cx. quinquefasciatus, with a synergistic effect when both stimuli were present simultaneously. This is the first study in which nonane is shown to cause oviposition under natural conditions, suggesting that this compound can potentially be exploited for the management of mosquito vectors.

scholarly journals Synergism between nonane and emanations from soil as cues in oviposition-site selection of natural populations of Anopheles gambiae and Culex quinquefasciatus

2020 ◽  
Author(s):  
Victor Saturnus Mwingira ◽  
Leonard E.G. Mboera ◽  
Willem Takken
Keyword(s):  
Synergistic Effect ◽  
Anopheles Gambiae ◽  
Culex Quinquefasciatus ◽  
Site Selection ◽  
Natural Populations ◽  
Breeding Site ◽  
Distilled Water ◽  
Oviposition Site Selection ◽  
Untreated Soil ◽  
Selection Of

Abstract Background: Olfactory cues have been shown to have an important role in guiding gravid mosquito females to selected sites for egg laying. The objective of this study was to determine the influence of emanations from soil from a breeding site and the putative oviposition pheromone nonane on oviposition-site selection of natural populations of Anopheles gambiae s.l. and Culex quinquefasciatus . Methods: This field-based study was conducted in Mvomero District in East-central Tanzania. In a dual-choice experimental set up, clay bowls were dug into the ground and filled with one of the following treatments: (i) distilled water + autoclaved soil (control), (ii) distilled water + soil from a natural mosquito breeding site, (iii) distilled water + nonane and (iv) distilled water + nonane + soil from a natural breeding site. Soil was either left untreated or was autoclaved before use. The number of larvae present in the bowls after 10 d was used as outcome measure. Results: Autoclaved soil had a significant effect on oviposition behaviour of Cx. quinquefasciatus ( P <0.005) but no effect on An. gambiae ( P = 0.18). Nonane and emanations from untreated soil significantly influenced the selection of oviposition sites by both An. gambiae ( P < 0.0001) and Cx. quinquefasciatus ( P< 0.0001). A mixture of nonane and untreated soil caused a synergistic effect on oviposition behaviour compared to either nonane or untreated soil alone, in both An. gambiae (Oviposition Activity Index (OAI) = 0.56; P < 0.001) and Cx. quinquefasciatus (OAI =0.59; P <0.0001) . Conclusion: The larval pheromone nonane and emanations from breeding-site soil both induced oviposition in wild An. gambiae s.l. and Cx. quinquefasciatus, with a synergistic effect when both stimuli were present simultaneously. This is the first study in which nonane is shown to cause oviposition under natural conditions, suggesting that this compound can potentially be exploited for the management of mosquito vectors.

Factors affecting site selection of access-restricted residential communities in Ankara

2018 ◽  
Vol 36 (3) ◽  
pp. 278-295
Author(s):  
Leyla Alkan-Gökler
Keyword(s):  
Site Selection ◽  
Housing Stock ◽  
Unit Price ◽  
Content Type ◽  
Factors Affecting ◽  
Housing Developments ◽  
Residential Communities ◽  
Residential Developments ◽  
Different Types ◽  
Selection Of

PurposeAnkara has experienced a recent rapid increase of residential communities that promise residents a comfortable lifestyle with strictly controlled entrances and several amenities. These luxury residential developments come in different forms, and are distributed unevenly across Ankara’s neighborhoods. Some neighborhoods become the center of gravity, and act like a magnet for these high-cost residential developments; however, most developers avoid making such costly investments in some other neighborhoods, which leads to an unfair distribution of profit across different locations in Ankara. The purpose of this paper is to examine the different factors affecting the site selection of different types of these real estate developments.Design/methodology/approachThe aim of this study has been to examine the factors affecting the site selection of different types of access-restricted housing developments through a multiple discriminant analysis (DA).FindingsThe results of the analysis revealed that distance from the city center and the unit price of the current housing stock are associated with high scores in the discrimination of neighborhoods of different types of residential communities.Practical implicationsThis paper implied a DA to create a better understanding of the site selection criteria behind access-restricted housing developments for policy makers to make better investment and management decisions.Originality/valueThe paper discusses the factors affecting the site selection of access-restricted residential communities in Ankara in order to show uneven distribution of profit across different locations caused by these developments.

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