scholarly journals Rapid declines in habitat quality and population size of the Liben (Sidamo) Lark Heteromirafra sidamoensis necessitate immediate conservation action – ERRATUM

2010 ◽  
Vol 20 (2) ◽  
pp. 214-214 ◽  
Author(s):  
PAUL F. DONALD ◽  
GRAEME M. BUCHANAN ◽  
NIGEL J. COLLAR ◽  
YILMA DELLELEGN ABEBE ◽  
MERID N. GABREMICHAEL ◽  
...  
Oecologia ◽  
2008 ◽  
Vol 159 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Natasha de Vere ◽  
Eelke Jongejans ◽  
Amy Plowman ◽  
Eirene Williams

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Ahmad Jupri ◽  
Baiq Riyan Anggriani Putri ◽  
Hilman Ahyadi ◽  
Yuliadi Zamroni

The conservation of sea turtles in a nature-based tourism area is significant to enhance sustainability of the sea turtle population in the wild. Small islands in Lombok Island chains, the Gili Matra, are one of the significant habitats for turtles, and the island is recognized as one of the islands with fastest tourism growth in Indonesia. The research aims to explore the stakeholders’ perspectives in sea turtle conservation in Gili Matra, Lombok. Focus group discussion was implemented to identify the stakeholder perspective. Literature survey was carried out to generate related data concerning sea turtle population and its habitat quality in Gili Matra. The result of this study indicates that stakeholders can identify three species of sea turtle in Gili Matra waters, namely the green sea turtle (Chelonia mydas), the Hawksbill Turtle (Eretmochelys imbricate), and the ridley sea turtle (Lepydochely olivacea). Stakeholders state that between 1990 and 2017, there was reduction in the population size in Gili Matra. Factors related to the decrease of population in Gili Matra include decrease of habitat quality and human activity. Some recommendations were made, including increasing socialization and campaign, providing tools and facility to support conservation action, controlling unsustainable practice of fish collection, strengthening the implementation of regulation, and providing training and technical assistance to the local community and local office.


2012 ◽  
Vol 17 (3) ◽  
pp. 537-547 ◽  
Author(s):  
Noémi Örvössy ◽  
Ádám Kőrösi ◽  
Péter Batáry ◽  
Ágnes Vozár ◽  
László Peregovits

2011 ◽  
Vol 75 (1) ◽  
pp. 69-78 ◽  
Author(s):  
Lucyna Mróz

The frequency distribution and density of three life stages as well as fitness components of the perennial plant <em>Colchicum autumnale</em> growing in the unmanaged road verges and in the extensive mown and grazed meadows in the Sudeten Mts. were studied. Furthermore, investigated were the effects of population size and plant size (measured as number of flowers) on reproductive success and explored if variation in reproductive and vegetative traits of adults could be associated with soil characteristics. The t-test indicated that proportions of subadults and reproductive adults were significantly lower in verge than in meadow populations, and of vegetative adults significantly higher. The plant density of reproductive adults and the reproductive adults to all adults ratio were significantly lower in verge populations compared to meadow populations. Although habitat type accounted for significant variation in stage structure, no significant difference was found between vegetative and reproductive traits in adult plants, except for the number of flowers. In verge populations the number of flowers was significantly lower as compared to meadow populations. The traits related to reproduction were not significantly influenced by population size. However, the proportion of flowers setting fruit decreased significantly with increasing number of flowers. The stepwise multiple regression revealed significant relationships between soil characteristics and number of fruits per plant, fruit set, number seeds per plant and number of leaves in vegetative adults. The results suggest that the creation of the low and relatively open vegetation cover could increase the chance of persistence of <em>C. autumnale</em> living in verge habitats by promoting of seed germination, seedling establishment and flowering, and they also show that the reproductive success and vegetative components of fitness are most likely influenced by habitat quality.


2019 ◽  
Vol 13 (1) ◽  
pp. 127-137
Author(s):  
Omar F. Al-Sheikhly ◽  
Ahmad J. Al-Azawi

Abstract There is scarce information on the migration patterns and population size of the Eurasian marsh harrier (Circus aeruginosus) in Iraq in general and in the southern Mesopotamian wetlands in particular. From February 2018–April 2019, a total of 11 field expeditions were conducted in the Central Marshes (219,700 ha), one of the major Mesopotamian wetlands and Iraq’s National Park, a RAMSAR and UNESCO site. Two of the field survey objectives were to determine the spatial and temporal distribution and estimate the population size of the migratory/wintering Eurasian marsh harrier in the Central Marshes. Distance sampling on three line-transects covering a study plot of 40,000 ha was conducted. Among other wintering Circus harriers, the Eurasian marsh harrier was the most abundant species with a total of 93 individuals recorded. The estimated species densities were 0.0042–0.035 individuals/ha, and the estimated size of the Eurasian marsh harrier migratory population in the Central Marshes was 922.7–7,689.5 individuals. Moreover, the migration phenology and breeding status of the Eurasian marsh harrier in the Central Marshes were investigated. Our efforts did not confirm the breeding of this species during recent years, or since the inundation of the Mesopotamian wetlands in 2003. Furthermore, hunting and trapping were identified as major threats affecting the species which need urgent conservation action.


2003 ◽  
Vol 91 (1) ◽  
pp. 18-26 ◽  
Author(s):  
Philippine Vergeer ◽  
Ramses Rengelink ◽  
Annemieke Copal ◽  
N. Joop Ouborg

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