Post‐release dispersal and breeding site suitability of reintroduced populations of the Crested Ibis in Shaanxi Province, China

2021 ◽  
Author(s):  
Fang Wang ◽  
Min Li ◽  
Ya‐shuai Zhang ◽  
Wen‐ai Zhao ◽  
Dan‐ni Liu ◽  
...  
Keyword(s):  
Breeding Site ◽  
Shaanxi Province ◽  
Site Suitability ◽  
Crested Ibis

Survival rates of a reintroduced population of the Crested Ibis Nipponia nippon in Ningshan County (Shaanxi, China)

2017 ◽  
Vol 28 (1) ◽  
pp. 145-156 ◽  
Author(s):  
YANFANG LI ◽  
XINPING YE ◽  
MIN WANG ◽  
XIA LI ◽  
RONG DONG ◽  
...  
Keyword(s):  
Survival Rate ◽  
Survival Rates ◽  
Shaanxi Province ◽  
Factors Affecting ◽  
Annual Survival ◽  
Nipponia Nippon ◽  
Crested Ibis ◽  
Adult Sex Ratio ◽  
Capture Recapture ◽  
Reintroduced Population

SummaryA reintroduction project for the endangered Crested Ibis Nipponia nippon was conducted in Ningshan County (Shaanxi Province) on May 31, 2007. Post-release monitoring of the survival of the reintroduced population was carried out extensively from 2008 to 2015. Data collected over eight years after release were used to estimate the annual survival rate for different cohorts using a Cormack-Jolly-Seber model with capture-recapture data. The mean annual survival rates for all individuals were estimated to be 0.738 (95% CI: 0.547–0.801) and 0.752 (95% CI: 0.478–0.887) for released birds. For different age classes in the recipient population, the survival rates were estimated to be 0.384 (95% CI: 0.277–0.504), 0.853 (95% CI: 0.406–0.978), and 0.812 (95% CI: 0.389–0.950) for yearlings, juveniles and adults, respectively. The higher mortality for yearlings has greatly decreased the survival rate and our focal population was indeed sensitive to changes in yearling survival. Therefore, effective protection of yearlings was crucial to population persistence, as well as to juveniles and adults. The large proportion of mature individuals in our focal population indicated a gradually growing population. There was a slight bias towards males in the adult sex ratio with the increase of wild-born offspring, but it was not statistically significant. Therefore, we conclude that the primary goal of establishing a self-sustaining population of the Crested Ibis in part of their historical range has been achieved. Finally, we discuss factors affecting the survival of the reintroduced population and we propose some changes for future management of endangered species.

scholarly journals Reproductive success of the Crested Ibis Nipponia nippon

2006 ◽  
Vol 16 (4) ◽  
pp. 325-343 ◽  
Author(s):  
XIAOPING YU ◽  
NAIFA LIU ◽  
YONGMEI XI ◽  
BAOZHONG LU
Keyword(s):  
Breeding Success ◽  
Large Degree ◽  
Limited Range ◽  
Central China ◽  
Shaanxi Province ◽  
Limiting Factor ◽  
Protection Measures ◽  
Nipponia Nippon ◽  
Crested Ibis ◽  
In The Wild

The last remaining population of the Crested Ibis Nipponia nippon in the wild was studied in the Qinling Mountains, Yangxian County, Shaanxi Province, central China, over 24 breeding seasons with particular attention being paid to the nesting behaviour and breeding success. The average clutch size varied significantly among years (2.84 ± 0.77; n = 271), suggesting that food abundance, which was distinct in different areas, was indeed a limiting factor. The mean hatching success was 80.2%, and ranged from 35.7% to 100%. Egg losses were due to three reasons: infertility or the eggs being addled, predation, and human disturbance. Three reasons accounting for chick death were highlighted: shortage of food, predation, and disturbance from local inhabitants. However, the overall breeding success of the Crested Ibis, which averaged 65.6%, was much higher than that of many nidicolous birds and was clearly dependent not only on the stability of pair maintenance but also on human conservation and protection measures. The relatively higher proportion of unsuccessful nests at altitudes between 500–700 m and 701–900 m was linked with the more frequent human activities, predation and lower stability of nest-trees in such areas. The fact that there was no significant variation in the number of successful nests or breeding success across different altitudinal zones demonstrated that, to a large degree, habitats used by the Crested Ibis were now suitable for breeding. The rapid increase in the species' numbers in recent years has been achieved through effective protection measures, including legislation, management of population and habitat, and regular surveys and monitoring. A reintroduction programme has been put into effect, protecting the population from a chance catastrophe such as communicable diseases within its limited range.

Comparação de testes coproparasitológicos em criadouro comercial de psitacídeos exóticos

2020 ◽  
Vol 3 (5) ◽  
pp. 100-107
Author(s):  
Marina Camargo de Sousa ◽  
◽  
Julia Ronzani Vial ◽  
Rodrigo Hidalgo Friciello Teixeira ◽  
Andrea Cristina Higa Nakaghi ◽  
...  
Keyword(s):  
Statistical Tests ◽  
Companion Animals ◽  
Clinical Importance ◽  
Breeding Site ◽  
Chi Square ◽  
Fecal Samples ◽  
Breeding Sites ◽  
Specificity And Sensitivity ◽  
Nematode Eggs ◽  
Commercial Breeding

Birds of the psittaciform order, composed by the Psittacidae and Loridae family have several characteristics making them more frequently kept as companion animals, promoting the increase of breeding sites in Brazil. The present study aimed to analyze the specificity and sensitivity of three different coproparasitological tests, Willis, Hoffman and Direto de feces, through statistical tests: Chi-Square and Kappa. 70 fecal samples of exotic parrots were collected from a commercial breeding site and these were submitted to the three tests, totaling 210 coproparasitological exams. Among the tests performed, 29,5% were positive for nematode eggs, cestodes and oocysts. Coproparasitological exams are inexpensive, have clinical importance, indicating the population of endoparasites and therapeutic treatments.

A Study on Site Suitability of the Secondary School Teacher Education Curriculum Focusing on Science and Math Subject

2015 ◽  
Vol 16 (4) ◽  
pp. 1-30 ◽  
Author(s):  
Seung Jung Kim ◽  
Soo Jeung Lee ◽  
Jung Cheol Shin ◽  
Jae Geun Kim ◽  
June hee Yoo ◽  
...  
Keyword(s):  
Teacher Education ◽  
Secondary School ◽  
School Teacher ◽  
Secondary School Teacher ◽  
Education Curriculum ◽  
Site Suitability ◽  
Teacher Education Curriculum

GIS BASED SITE SUITABILITY MODELLING FOR LOCATING SOLAR POWER PARK IN THIRUVANNAMALAI DISTRICT, TAMIL NADU

2018 ◽  
Vol 11 (4) ◽  
pp. 43
Author(s):  
R. RESHMA ◽  
M. RAMESH ◽  
JAYASEELAN STEPHEN ◽  
R. JAGANATHAN ◽  
◽  
...  
Keyword(s):  
Tamil Nadu ◽  
Solar Power ◽  
Site Suitability

Southwestern Willow Flycatcher Breeding Site and Territory Summary - 2007

2008 ◽  
Author(s):  
Scott L. Durst ◽  
Mark K. Sogge ◽  
Shay D. Stump ◽  
Hira A. Walker ◽  
Barbara E. Kus ◽  
...  
Keyword(s):  
Breeding Site ◽  
Willow Flycatcher

Spatio-temporal analysis and prediction of grain security in Shaanxi Province

2010 ◽  
Vol 17 (4) ◽  
pp. 770-775
Author(s):  
Ren YANG ◽  
Zhi-Yuan REN ◽  
Qian XU ◽  
Mei-Xia WANG
Keyword(s):  
Temporal Analysis ◽  
Shaanxi Province ◽  
Spatio Temporal ◽  
Grain Security
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