Rose-ringed Parakeet Psittacula krameri Populations and Numbers in Europe: A Complete Overview
نویسندگان
چکیده
منابع مشابه
Effect of photoperiod on the adrenal activities of male rose ringed parakeet, Psittacala krameri.
Adult male rose ringed parakeets were exposed to very long photoperiod (22 hr L: 2 hr D) and very short photoperiod (2 hr L: 22 hr D) daily for 60 days during different phases of the annual testicular cycle. Adrenal activities of the experimental birds were compared with that of parallel held natural photoperiodic birds. Marked atrophy of adrenocortical cells was noted in the glands of long pho...
متن کاملAlien invasive birds.
A bird species is regarded as alien invasive if it has been introduced, intentionally or accidentally, to a location where it did not previously occur naturally, becomes capable of establishing a breeding population without further intervention by humans, spreads and becomes a pest affecting the environment, the local biodiversity, the economy and/or society, including human health. European St...
متن کاملExperimental evidence of impacts of an invasive parakeet on foraging behavior of native birds
Resource competition is one potential behavioral mechanism by which invasive species can impact native species, but detecting this competition can be difficult due to the interactions that variable environmental conditions can have on species behavior. This is particularly the case in urban habitats where the disturbed environment can alter natural behavior from that in undisturbed habitats. Th...
متن کاملResource Use by Non-Native Ring-Necked Parakeets (Psittacula krameri) and Native Starlings (Sturnus vulgaris) in Central Europe
In general, non-native bird species may competitively exclude native species from nest sites. The potential resource conflict between a native and an introduced bird species, the native European Starling (Sturnus vulgaris) and the introduced Asian Ring-necked Parakeet (Psittacula krameri), was inferred from hole occupancy in parks of the German Upper Rhine Valley (Wiesbaden, Mannheim, Schwetzin...
متن کاملParakeet Damage to Sunflower in Pakistan
Rose-ringed parakeet (Psittacula krameri (Scopoli) damage to sunflower heads was estimated in two provinces of Pakistan during the spring of 1981. In seven districts of Punjab the damage ranged from 5.0-23.28 %, with an average of 11.72 %. In rainfed areas the damge was as high as 71.43%, with average of 38.29%. In Sind the damage was on the higher order. In nine districts the damage ranged fro...
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ژورنال
عنوان ژورنال: The Open Ornithology Journal
سال: 2016
ISSN: 1874-4532
DOI: 10.2174/1874453201609010001