Geographic diversification in the call repertoire of the genus Pyrrhocorax (Aves, Corvidae)

2001 ◽  
Vol 79 (9) ◽  
pp. 1568-1576 ◽  
Author(s):  
Paola Laiolo ◽  
Antonio Rolando ◽  
Anne Delestrade ◽  
Augusto De Sanctis
Keyword(s):  
Central Asia ◽  
Geographic Distance ◽  
Geographic Diversification ◽  
Repertoire Size ◽  
Interspecific Differences ◽  
Call Repertoire

We analysed the call repertoires of the Red-billed Chough (Pyrrhocorax pyrrhocorax) and the Alpine Chough (Pyrrhocorax graculus) across three continents (Europe, Asia, and Africa) for intraspecific and interspecific differences in call-repertoire size and discuss the factors that could have promoted its evolution. The overall call repertoire of the Red-billed Chough was twice as large as that of the Alpine Chough, but the number of calls recorded in each population did not differ significantly between the two species. The greater fragmentation of the range of the Red-billed Chough possibly induced its remarkable call-repertoire diversification. Some populations (i.e., those from Ethiopia, Central Asia, Canaries) had a peculiar call repertoire that overlapped very little with those from other regions; consequently, the overall numbers of call types within the species were heavily influenced by these unusual populations and were very large. The call-repertoire size and call-repertoire similarity of populations of both species were affected and constrained by geographic distance. More closely situated or continental populations tended to have a more similar pool of calls (this is probably due to mingling among close populations).

The evolution of functionally referential alarm communication

1999 ◽  
Vol 3 (2) ◽  
pp. 135-147 ◽  
Author(s):  
Daniel T. Blumstein
Keyword(s):  
Alarm Call ◽  
Referential Communication ◽  
Alarm Calls ◽  
Repertoire Size ◽  
Motor Abilities ◽  
Antipredator Responses ◽  
Tight Association ◽  
Functionally Referential ◽  
Alarm Communication ◽  
Call Repertoire

Many species produce specific alarm vocalizations when they encounter predators. There is considerable interest in the degree to which bird, ground-dwelling sciurid rodent, and primate alarm calls denote the species or type of predator that elicited the vocalization. When there is a tight association between the type or species of predator eliciting an alarm call, and when a played-back alarm call elicits antipredator responses qualitatively similar to those seen when individuals personally encounter a predator, the alarm calls are said to be functionally referential. In this essay I aim to make two simple points about the evolution of functionally referential alarm communication. Firstly, functionally referential communication is likely to be present only when a species produces acoustically distinct alarm vocalizations. Thus, to understand its evolution we must study factors that influence the evolution of alarm call repertoire size. Secondly, and potentially decoupled from the ability to produce acoustically distinctive alarm vocalizations, species must have the perceptual and motor abilities to respond differently to acoustically-distinct alarm vocalizations. Thus, to understand the evolution of functionally referential communication we also must study factors that influence the evolution of context-independent perception. While some factors may select for functionally referential alarm communication, constraints on production or perception may prevent its evolution.

scholarly journals Evolving communicative complexity: insights from rodents and beyond

2012 ◽  
Vol 367 (1597) ◽  
pp. 1869-1878 ◽  
Author(s):  
Kimberly A. Pollard ◽  
Daniel T. Blumstein
Keyword(s):  
Group Size ◽  
Social Role ◽  
Alarm Call ◽  
Ground Squirrels ◽  
Prairie Dogs ◽  
Behavioural Ecology ◽  
Simple Complex ◽  
Repertoire Size ◽  
Comprehensive Theory ◽  
Call Repertoire

Social living goes hand in hand with communication, but the details of this relationship are rarely simple. Complex communication may be described by attributes as diverse as a species' entire repertoire, signallers' individualistic signatures, or complex acoustic phenomena within single calls. Similarly, attributes of social complexity are diverse and may include group size, social role diversity, or networks of interactions and relationships. How these different attributes of social and communicative complexity co-evolve is an active question in behavioural ecology. Sciurid rodents (ground squirrels, prairie dogs and marmots) provide an excellent model system for studying these questions. Sciurid studies have found that demographic role complexity predicts alarm call repertoire size, while social group size predicts alarm call individuality. Along with other taxa, sciurids reveal an important insight: different attributes of sociality are linked to different attributes of communication. By breaking social and communicative complexity down to different attributes, focused studies can better untangle the underlying evolutionary relationships and move us closer to a comprehensive theory of how sociality and communication evolve.

Geographic diversification in the call repertoire of the genus Pyrrhocorax (Aves, Corvidae)

2001 ◽  
Vol 79 (9) ◽  
pp. 1568-1576 ◽  
Author(s):  
Paola Laiolo ◽  
Antonio Rolando ◽  
Anne Delestrade ◽  
Augusto De Sanctis
Keyword(s):  
Geographic Diversification ◽  
Call Repertoire

The Russian Conquest of Central Asia

2020 ◽  
Author(s):  
Alexander Morrison
Keyword(s):  
Central Asia

Nonlocal Fandom: Effects of Geographic Distance, Geographic Identity, and Local Competition on Team Identification

2019 ◽  
Vol 28 (4) ◽  
pp. 195-208
Author(s):  
Katherine Reifurth ◽  
Matthew Bernthal ◽  
Khalid Ballouli ◽  
Dorothy Collins
Keyword(s):  
Geographic Distance ◽  
Team Identification ◽  
Local Competition

ANALISIS FAKTOR-FAKTOR MINAT NASABAH MEMILIKI KARTU KREDIT BCA PADA PT. BANK CENTRAL ASIA CABANG MANGGA BESAR RAYA

2019 ◽  
Vol 11 (2B) ◽  
pp. 47
Author(s):  
Asna Manullang ◽  
Debih Arliana
Keyword(s):  
Central Asia ◽  
Product Price ◽  
Physical Evidence ◽  
Place Promotion ◽  
Promotion Process

Tingkat pencapaian minat nasabah untuk memiliki kartu kredit BCA dipengaruhi oleh delapan kelompok variabel yang dikenal sebagai 8P yaitu Product, Price, Place, Promotion, Process, Physical evidence, People dan Produktivity and quality. Penelitian dilakukan di PT.Bank Central Asia, Jalan Mangga Besar Raya No. 128 Jakarta Pusat. Tujuan dari penelitian adalah untuk mengetahui bagaimana pengaruh faktor-faktor minat nasabah memiliki kartu kredit BCA. Penelitian ini menggunakan 2 metoda yaitu metoda deskriptif yaitu mengembangkan produk dan jasa yang sudah ada dan analisa kuantitatif dibagi menjadi dua analisa yang pertama analisa uji validitas dan analisa uji reabilitas. Data yang dianalisa yaitu analisis faktorfaktor yang menjadi daya tarik konsumen untuk memiliki kartu kredit BCA dapat dihitung dan diteliti langsung, data dianalisis dengan menggunakan SPSS versi 16.0. Responden telah mengisi 33 pertanyaan yang disebut dengan variabel dengan nilai skor dan dibagi berdasarkan kelompok sebagai faktornya. Hasil analisis dapat disimpulkan daya tarik konsumen untuk memiliki kartu kredit BCA ada 7 faktor utama. Faktor pertama Produk dengan nilai varians (11,74), faktor ke dua adalah Harga dengan nilai varians (10,73%), faktor ke tiga adalah Distribusi dengan nilai varians (8%), faktor ke empat adalah Promosi dengan nilai varians (7,77%), faktor ke lima adalah Proses dengan nilai varians (6,75%), faktor ke enam adalah Fisik dengan nilai varians (6,28%) dan faktor ke tujuh adalah Kualitas dengan nilai varians (5,76%). Faktor produk merupakan faktor yang paling mempengaruhi konsumen untuk memiliki kartu kredit BCA. Faktor ini dapat menerangkan keragaman data (varians) sebesar 11,74%. Dari beberapa analisis yang diperoleh bahwa faktor produk sangat berpengaruhi positif terhadap keputusan konsumen dalam memiliki kartu kredit BCA karena konsumen menginginkan produk yang baik agar dapat mempermudah transaksi dimana saja dan kapan saja. Kata Kunci: BCA, kartu kredit, Keputusan Nasabah

The Elachistidae of southern Siberia and Central Asia, with descriptions of five new species (Lepidoptera)¹

1992 ◽  
Vol 3 (4) ◽  
pp. 177-194 ◽  
Author(s):  
Lauri Kaila
Keyword(s):  
New Species ◽  
Central Asia ◽  
Baikal Region ◽  
Tianshan Mountains ◽  
Previous Literature ◽  
Altai Mountains ◽  
Southern Siberia

The Elachistidae material collected during the joint Soviet-Finnish entomological expeditions to the Altai mountains, Baikal region and Tianshan mountains of the previous USSR is listed. Previous literature dealing with the Elachistidae in Central Asia is reviewed. A total of 40 species are dealt with, including descriptions of five new species: Stephensia jalmarella sp. n. (Altai), Elachista baikalica sp. n. (Baikal), E. talgarella sp. n. (southern Kazakhstan), E. esmeralda sp. n. (southern Kazakhstan) and E. filicornella sp. n. (southern Kazakhstan). The previously unknown females of E. bimaculata Parenti, 1981 and Biselachista zonulae Sruoga, 1992 are described.

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