scholarly journals Multi-scale habitat use analysis and interspecific Ecology of the Critically Endangered Black-breasted Puffleg Eriocnemis nigrivestis

2015 ◽  
Vol 25 (4) ◽  
pp. 479-488 ◽  
Author(s):  
ESTEBAN A. GUEVARA ◽  
ELISA BONACCORSO ◽  
JOOST F. DUIVENVOORDEN
Keyword(s):  
Habitat Use ◽  
Habitat Degradation ◽  
Physiological Stress ◽  
Selection Process ◽  
Habitat Model ◽  
Critically Endangered ◽  
Use Patterns ◽  
Multi Scale ◽  
The North ◽  
Competition Hypothesis

SummaryThe Black-breasted Puffleg Eriocnemis nigrivestis is a hummingbird endemic to Ecuador and considered Critically Endangered, given its limited distribution, low population numbers, and ongoing habitat degradation. We investigated habitat use patterns using landscape and microhabitat variables. In addition, we explored a previously postulated competition hypothesis involving the Black-breasted Puffleg and the Gorgeted Sunangel Heliangelus strophianus. Our results suggest that landscape variables may play a role in the habitat selection process; specifically the distance to nearest forest border seems to have a significant effect on our habitat model. We speculate that, as the species is known to perform seasonal movements, the avoidance of forest border might reduce the physiological stress caused by altitudinal migration. At microhabitat level, Black-breasted Puffleg seems not sensitive to forest structure variables. Our findings suggest that ensuring forest tract connectivity, between the altitudinal extremes of the species’ range at the north-western flanks of the Pichincha volcano, might be crucial for survival of the species during its annual cycle. However, non-metric multidimensional scaling (NMDS) indicates that Black-breasted Puffleg and the Gorgeted Sunangel do not overlap spatially, but this finding is not conclusive considering our field observations.

scholarly journals Early Winter Habitat Use by Mountain Caribou in the North Cariboo and Columbia Mountains, British Columbia

Rangifer ◽  
1996 ◽  
Vol 16 (4) ◽  
pp. 133 ◽  
Author(s):  
E. Terry ◽  
B. McLellan ◽  
G. Watts ◽  
J. Flaa
Keyword(s):  
British Columbia ◽  
Habitat Use ◽  
Regional Differences ◽  
Rangifer Tarandus ◽  
Winter Habitat ◽  
Use Patterns ◽  
The North ◽  
Columbia Mountains ◽  
Management Plans ◽  
Spruce Stands

Winter habitat use was compared between two mountain caribou (Rangifer tarandus caribou) populations in British Columbia. Regional differences were apparent during November and December. Radio-collared caribou inhabiting the gentle plateaus of the northern Cariboo Mountains, near Prince George, B.C. primarily used mid-elevation balsam-spruce stands on moderate slopes (<30%). In contrast, radio-collared caribou in the North Columbia Mountains, near Revelstoke, B.C. used low elevation hemlock-cedar stands and relatively steeper slopes (>30%). To adequately address habitat requirements of caribou, forest management plans should incorporate varying regional and seasonal habitat use patterns. Hypotheses on observed differences in habitat use are discussed.

Habitat use by marine tucuxis (Sotalia guianensis) (Cetacea: Delphinidae) in Guanabara Bay, south-eastern Brazil

2007 ◽  
Vol 87 (1) ◽  
pp. 201-205 ◽  
Author(s):  
Alexandre F. Azevedo ◽  
Alvaro M. Oliveira ◽  
Simone C. Viana ◽  
Monique Van Sluys
Keyword(s):  
Habitat Use ◽  
Habitat Degradation ◽  
Guanabara Bay ◽  
Sotalia Guianensis ◽  
South Eastern ◽  
The North ◽  
Eastern Brazil ◽  
North Eastern ◽  
Kolmogorov Smirnov ◽  
South Axis

Data on habitat use by marine tucuxis (Sotalia guianensis) were collected in Guanabara Bay (GB), south-eastern Brazil, over a two-year period. Diurnal activities of marine tucuxis were dominated by behaviour related to feeding/foraging (58% of all recorded time). Dolphins spent more time in feeding/foraging activities in the morning with a secondary peak in late afternoon. Dolphins were seen in waters of 2 to 35 m (11.63±6.05; median=12.0). Depths used by S. guianensis groups significantly differed from depths available in GB (Kolmogorov–Smirnov test; Z=5.72; P<0.001). Most groups (69.8%) were sighted in depths between 5.1 and 15.0 m. Dolphins occupied an area of 136.9 km2, which represents about 42% of the entire water surface of GB. Individuals selected areas within GB and avoided the most degraded ones, which suggests that habitat degradation may affect S. guianensis distribution. Diurnal distances travelled by individuals ranged from 3.3 to 27.2 km in a same day. Dolphins found in main channel and adjacent waters moved along the north–south axis of GB throughout the day and covered distances three times greater than dolphins which concentrated their activities in north-eastern areas.

RESULTS OF COOPERATION BETWEEN BREEDERS OF DIFFERENT INSTITUTIONS IN CREATION OF NEW GENERATION APPLE TREE

1970 ◽  
pp. 46-49
Author(s):  
Е. N. Sedov ◽  
T. V. Yanchuk ◽  
S. А. Korneeva ◽  
L. I. Dutova ◽  
Е. V. Ulianovskaya
Keyword(s):  
Selection Process ◽  
North Caucasus ◽  
Joint Work ◽  
Crop Breeding ◽  
Scientific Center ◽  
The North ◽  
State Register ◽  
Russian Research Institute ◽  
Apple Cultivars ◽  
New Generation

The experience in cooperation of breeders of different institutions in creating cultivars is shown. It is not always when the breeding institution has the necessary initial forms for selection. In this regard, there is a need to conduct separate stages of selection in different breeding institutions. For this purpose, a provision on authorship and continuity in the integrated work of several institutions in fruit breeding has been developed (Program and methods of fruit, berry and nut crop breeding. Annex. – Orel, 1995. – pp. 492-498). Breeding work of the Russian Research Institute of Fruit Crop Breeding (VNIISPK) and North Caucasian Federal Scientific Center of Horticulture, Viticulture, Winemaking can serve as a positive experience of creating new apple cultivars by two institutions. As a result of the joint work of these two institutions, 22 apple cultivars have been created, of which 9 have already been included in the state register of breeding achievements approved for use (zoned), including three cultivars for the conditions of the Middle zone of Russia – Aleksandr Boiko, Maslovskoye and Yablochny Spas and six cultivars for the conditions of the North Caucasus – Vasilisa, Karmen, Margo, Orfey, Soyuz and Talisman. Brief economical and biological characteristics of these cultivars are given in this paper. The obtained practical results indicate that in some cases, when creating modern cultivars that meet the requirements of production, it is necessary to use the knowledge of breeders, the source material and equipment of different breeding institutions, and carry out separate stages of the selection process in different institutions.

IMPLEMENTASI METODE VIKOR DALAM PEMILIHAN KEPALA SEKOLAH BERPRESTASI PADA DINAS PENDIDIKAN SUMATERA UTARA

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Sri Wulan ◽  
Berto Nadeak ◽  
Rivalri Kristianto Hondro ◽  
Fince Tinus Waruwu
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Support System ◽  
Selection Process ◽  
Assessment Process ◽  
Head Of School ◽  
Global Era ◽  
Professional Attitude ◽  
The North ◽  
North Sumatra

North Sumatra Office of education through the Directorate General of Teachers conducting the election of the head of the school is doing, with these activities the North sumatra Office of education hope school principals have success in education, so demanding to renew the social and professional attitude in managing education led. The election of the head of school is done to be able to improve quality and manage in school education so that it could be improved, so that it is able to answer the challenges of the global era-based excellence. The selection process should be free from the interests of religion, tribe or region. So that the final results of the election, do not cause harm to either party. But in pelaksanaanya there are some parties who feel aggrieved because of the lack of transparency of the assessment process and clear terms for the election of the head of school achievers. Resolve the problem then need to built a decision support system (SPK) which is able to provide the ability to solve problems with the condition of semi structured and unstructured. Use the perangkingan method, it is expected that it may facilitate in providing the principal election decision accomplished using VIKOR. The results obtained in this study is an alternative that has been dirangkingkan. Based on the results of the rank of produced output that is the names of the principal performer.Keywords: Head Of School Achievers, Decision Support System, VIKOR Method

Can animal habitat use patterns influence their vulnerability to extreme climate events? An estuarine sportfish case study

2017 ◽  
Vol 23 (10) ◽  
pp. 4045-4057 ◽  
Author(s):  
Ross E. Boucek ◽  
Michael R. Heithaus ◽  
Rolando Santos ◽  
Philip Stevens ◽  
Jennifer S. Rehage
Keyword(s):  
Habitat Use ◽  
Extreme Climate Events ◽  
Use Patterns ◽  
Extreme Climate ◽  
Climate Events ◽  
Animal Habitat

scholarly journals Habitat use patterns of franciscana dolphins (Pontoporia blainvillei) off southern Brazil in relation to water depth

2009 ◽  
Vol 89 (5) ◽  
pp. 943-949 ◽  
Author(s):  
Daniel Danilewicz ◽  
Eduardo R. Secchi ◽  
Paulo H. Ott ◽  
Ignacio B. Moreno ◽  
Manuela Bassoi ◽  
...  
Keyword(s):  
Habitat Use ◽  
Rio Grande ◽  
Limiting Factors ◽  
Small Scale ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Use Patterns ◽  
Management Procedures ◽  
By Catch ◽  
Pontoporia Blainvillei

The patterns of habitat use by the franciscana dolphins (Pontoporia blainvillei) along its distribution are poorly known. This study investigates the patterns of habitat use with respect to depth for 181 individuals of different age, size, gender and reproductive condition off Rio Grande do Sul, southern Brazil. The results reveal that franciscanas are very homogeneously distributed according to depth. Individuals from all lengths utilize nearly the entire range of depths of the surveyed area. Larger or older animals do not use deeper waters than younger animals, indicating that body size and age are not limiting factors for franciscanas that occupy deeper or offshore waters. Gestation seems to not cause a change in the distribution of females. Although the sex-ratio of the overall data did not vary from 1:1 in different depth intervals, a small-scale comparison between the northern and southern coast demonstrated the existence of some kind of sexual segregation. Franciscana by-catch in Rio Grande do Sul is not sustainable and it is agreed that management procedures are needed. Nevertheless, the available data on species distribution do not allow the designing of a protected area in order to minimize the by-catches of a particular sex/reproductive class.

Sign in / Sign up

Export Citation Format

Share Document