Multivariate Analysis of Morphological Variation in Accessions of Aegilops crassa from Iran

2007 ◽  
Vol 10 (7) ◽  
pp. 1126-1129 ◽  
Author(s):  
M. Ranjbar ◽  
M.R. Naghavi ◽  
A. Zali ◽  
M.J. Aghaei
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
Aegilops Crassa

Morphological variation and ecological distribution of co-occurring larval forms of Oreolalax (Anura: Pelobatidae)

1994 ◽  
Vol 15 (2) ◽  
pp. 109-121 ◽  
Author(s):  
H. Bradley Shaffer ◽  
Robert F. Inger ◽  
Guan-Fu Wu ◽  
Er-Mi Zhao
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
Sichuan Province ◽  
Ecological Distribution ◽  
Additional Species ◽  
Maximum Width ◽  
Ecological Segregation ◽  
Number Of Species ◽  
Stream Size

AbstractThe amphibian fauna of Sichuan Province, China, is remarkable for the large number of species of pelobatid frogs, of which species of Oreolalax form a large portion. We have collected larvae of five species of Oreolalax on Mt. Emei, Sichuan, four of these five at a second locality 40 km from Mt. Emei, and larvae of two additional species at a locality 200 km S of Mt. Emei. These tadpoles are very similar to one another morphologically, a conclusion supported by multivariate analysis. We give diagnostic descriptions and a key for the identification of these seven larval forms. All tadpoles of Oreolalax have lotic habits, and the seven species in our study live in small to medium-sized streams (maximum width 8 m). These species show only moderate ecological segregation in terms of stream size and microhabitat type.

Morphological Variation of Dioon (Zamiaceae) from the Pacific Slope of Mexico Using a Multivariate Analysis

2007 ◽  
Author(s):  
Georgina Vargas Amado ◽  
Jorge Alberto Pérez de la Rosa ◽  
José Pablo Torres Morán ◽  
Waldina Patricia Reyes Velázquez
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
The Pacific ◽  
Pacific Slope

Two new species of pitviper of the genus Cryptelytrops Cope 1860 (Squamata: Viperidae: Crotalinae) from Southeast Asia

Zootaxa ◽  
2011 ◽  
Vol 2757 (1) ◽  
pp. 1 ◽  
Author(s):  
ANITA MALHOTRA ◽  
ROGER S. THORPE ◽  
MRINALINI _ ◽  
BRYAN L. STUART
Keyword(s):  
Multivariate Analysis ◽  
New Species ◽  
Species Diversity ◽  
Southeast Asia ◽  
Morphological Variation ◽  
Northern Thailand ◽  
Southern Vietnam ◽  
Two New Species

We describe two new species of green pitviper from Southeast Asia that are morphologically similar to Cryptelytrops macrops, but can be distinguished from that species by genetic means, multivariate analysis of morphology and some aspects of coloration. Cryptelytrops cardamomensis sp. nov., is described from southeastern Thailand and the Cardamom Mountains of southwestern Cambodia. Cryptelytrops rubeus sp. nov. has been recorded from southern Vietnam and eastern Cambodia. These species have previously been confused with C. macrops, hence we also present here a redescription of this species, whose range is now restricted to Thailand, southern and central Laos, and northeastern Cambodia. All three species are present in Cambodia, but have disjunct ranges corresponding to three separate highland regions in southwestern (Cardamom Mountains), northeastern (western edge of the Kontum Plateau) and eastern (low elevation hills on the western edge of the Langbian Plateau) Cambodia for C. cardamomensis, C. macrops and C. rubeus respectively. However, there is still considerable morphological variation between geographically separated populations of C. macrops s.s., and greater sampling in southern and northern Thailand in particular may be required before the species diversity of this group is fully clarified.

scholarly journals Taxonomy of the lesser jerboa Jaculus jaculus (Dipodidae, Rodentia) based on allozymic and morphological variation

2010 ◽  
Vol 56 (4) ◽  
pp. 421-431 ◽  
Author(s):  
Abderraouf Ben Faleh ◽  
Abdelwaheb Ben Othmen ◽  
Khaled Said
Keyword(s):  
Phylogenetic Analysis ◽  
Multivariate Analysis ◽  
Genetic Distance ◽  
North Africa ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Taxonomic Status ◽  
Sympatric Species ◽  
Restricted Area ◽  
Meeting Point

Abstract The lesser Egyptian jerboa Jaculus jaculus, is a member of the subfamily Dipodinae, known to have a number of subspecies. Previous studies of J. jaculus from North Africa found various morphological forms of unknown taxonomic status, which are frequently grouped into two taxa: J. jaculus and J. deserti. We assessed the taxonomic status of this taxon in Tunisia using allozymic (phylogenetic analysis of 23 genetic loci encoding 16 enzymatic proteins) and morphological (multivariate analysis of 13 craniodental characters) analyses of 136 J. jaculus specimens collected from seven localities within its distribution range. Allozymic analysis clearly indicated the existence of two distinct groups of J. jaculus, with a mean genetic distance (D) value of 0.99 and FST=0.52. Individuals within the two groups did not show any obvious geographical structuration, even within the Matmata locality which represents the meeting point for the two groups where they were found in sympatry. Additionally, morphometric analysis of 13 craniodental characters was clearly separated the two groups. These results were obtained over a very restricted area of the total distribution of J. jaculus and strongly suggest the occurrence of two separate and often sympatric species within the currently accepted J. jaculus in Tunisia: J. jaculus and J. deserti .

scholarly journals Multivariate analysis of morphological variation in enset (Ensete ventricosum (Welw.) Cheesman) reveals regional and clinal variation in germplasm from south and south western Ethiopia

2018 ◽  
Vol 12 (12) ◽  
pp. 1849-1858 ◽  
Author(s):  
Zerihun Yemataw ◽  
◽  
Kassahun Tesfaye ◽  
Murray Grant ◽  
David J. Studholme ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
Clinal Variation ◽  
Ensete Ventricosum ◽  
Western Ethiopia

Multivariate Analysis of Morphological Variation in Two Cryptic Species of Sancassania (Acari: Acaridae) from Costa Rica

2004 ◽  
Vol 97 (2) ◽  
pp. 322-345 ◽  
Author(s):  
Pavel B. Klimov ◽  
Mariam Lekveishvili ◽  
Ashley P.G. Dowling ◽  
Barry M. Oconnor
Keyword(s):  
Multivariate Analysis ◽  
Costa Rica ◽  
Cryptic Species ◽  
Morphological Variation

scholarly journals Morfological Variation of Endemic Fish Rainbow Celebensis (Telmatherina celebensis Boulenger) in Lake Towuti, South Sulawesi

2007 ◽  
Vol 3 (2) ◽  
pp. 5
Author(s):  
S.H. Nasution ◽  
. Sulistiono ◽  
D.S. Sjafei ◽  
G.S. Haryani
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation ◽  
World Heritage ◽  
Fish Population ◽  
Morphometric Character ◽  
Pectoral Fin ◽  
Male And Female ◽  
South Sulawesi ◽  
Endemic Fish ◽  
Lake Towuti

<p>Rainbow Celebensis <em>(Telmatherina celebensis </em>Boulenger) is one of endemic fish is a part of richness of biodiversity and world heritage in Lake Towuti. Rainbow Celebensis have beautiful colour especially in male, so that it is an economically and potentially as ornamental freshwater fish. It should be protected from threats because to fear decrease offish population in nature. This research is to know morphological variation of endemic fish rainbow Celebensis based on standard morphometric character in several stations. This research is conducted in Lake Towuti, South Sulawesi from March 2002 until April 2003 in four stations were I: Bakara Cape, II: inlet of Lake Towuti for River Tominanga, III: Loeha Island, IV: outlet of Lake Towuti to River Hola-hola. Sample were collected using experimental gillnet sized of <em>3A, </em>1, <em>lA, </em>and <em>VA </em>inch. Measuring offish standard morphometric character to be down on Kottelat <em>et al. </em>(1993) with modification covering 14 characters. The result of univariate and multivariate analysis towards standard morphometric character, could be said that male and female at I, II, III, and IV station is same tendency or to be deacended from one fish population. The characteristic to have influence of male are body hight and length from mouth to first pectoral fin, whereas in female are forskal length, total length, and basic length of second pectoral fin.</p> <p>Key words: Morphological variation. <em>Telmatherina celebensis, </em>lake Towuti.</p> <p> </p> <p>ABSTRAK</p> <p>Rainbow Selebensis adalah salah satu jenis ikan endemik dan merupakan bagian dari kekayaan sumberdaya hayati dan <em>world heritage, </em>yang terdapat di Danau Towuti. Rainbow Selebensis memiliki warna tubuh yang indah, terutama pada ikan jantan sehingga ikan tersebut berpotensi sebagai ikan hias air tawar yang bernilai ekonomis. Ikan ini perlu dilindungi dari ancaman kepunahan karena dikhawatirkan akan terjadi penurunan populasi ikan tersebut di alam. Penelitian ini bertujuan untuk melihat variasi morfologi ikan rainbow Selebensis berdasarkan karakter morfometrik baku pada beberapa stasiun. Penelitian dilakukan di perairan Danau Towuti, Sulawesi Selatan dari bulan Maret 2002 hingga April 2003 pada empat stasiun, yaitu I: Tanjung Bakara, II: <em>inlet </em>Danau Towuti yang berasal dari Sungai Tominanga, III: Pulau Loeha, dan IV: <em>outlet </em>Danau Towuti yang mengalir ke Sungai Hola-hola. Sampel ikan diperoleh dengan menggunakan jaring insang eksperimen <em>(experimental gillnet) </em>terdiri dari empat ukuran mata jaring yaitu <em>3A </em>, 1, <em>VA </em>. dan <em>VA </em>inci. Pengukuran karakter morfometrik ikan menggunakan metode baku yang mengacu pada Kottelat <em>et al. </em>(1993) yang dimodifikasi yang meliputi 14 karakter. Berdasarkan hasil analisis univariat dan multivariat terhadap karakter morfometrik baku di setiap stasiun, dapat dikatakan bahwa ikan jantan dan betina pada stasiun I, II, III, dan IV cenderung sama atau berasal dari satu kelompok populasi ikan. Karakter yang paling berpengaruh pada ikan jantan dicirikan oleh tinggi badan dan panjang dari mulut ke sirip punggung pertama, sedangkan pada ikan betina dicirikan oleh karakter panjang forskal, panjang total, dan panjang dasar sirip punggung kedua.</p> Kata kunci: Variasi morfologis. <em>Telmatherina celebensis, </em>Danau Towuti

Multivariate analysis of morphological variation in Acanthophyllum Sect. Oligosperma (Caryophyllaceae) from NE of Iran

2013 ◽  
Vol 2 (5) ◽  
Author(s):  
M. Mahmoodi Shamsabadi ◽  
H. Ejtehadi ◽  
J. Vaezi ◽  
M. R.Joharchi
Keyword(s):  
Multivariate Analysis ◽  
Morphological Variation

The genus Antennaria (Asteraceae: Inuleae) in North America: multivariate analysis of variation patterns in Antennaria rosea sensu lato

1988 ◽  
Vol 66 (8) ◽  
pp. 1583-1609 ◽  
Author(s):  
J. G. Chmielewski ◽  
C. C. Chinnappa
Keyword(s):  
Multivariate Analysis ◽  
North America ◽  
Environmental Factors ◽  
National Parks ◽  
Morphological Variation ◽  
Range Limits ◽  
Variation Patterns ◽  
Morphological Differences ◽  
Analysis Of Variation ◽  
Reproductive Characters

Patterns of morphological variation were examined among pistillate and staminate plants of Antennaria rosea Greene s.l. and northwestern microspecies in section Dioicae which are often placed in synonomy with A. rosea. The variation observed among pistillate plants was not correlated with geography, but in certain regions such as southern Yukon, Banff and Jasper national parks, the Cypress Hills of southeastern Alberta, and in the southern range limits the likelihood of finding atypical specimens increases. The northwestern taxa A. breitungii, A. elegans, A. incarnata, A. laingii, A. leuchippi, A. oxyphylla, and atypical forms of A. subviscosa, although similar in many characteristics to A. rosea, do represent distinct morphological entities. The fact that these taxa maintain their distinctive morphologies under controlled transplant studies suggests that their species rank may be maintained. Staminate plants in the northeastern portion of their distribution were consistently larger than those found elsewhere. The importance of vegetative and vegetative–reproductive characters in the discriminant function suggests that the morphological differences are in response to environmental factors.

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