Characteristics of peripheral populations of parthenogenetic Cnemidophorus laredoensis A (Squamata:Teiidae), in southern Texas

被引:0
作者
Walker, JM [1 ]
Cordes, JE
Paulissen, MA
机构
[1] Univ Arkansas, Dept Biol Sci, Fayetteville, AR 72701 USA
[2] Louisiana State Univ, Div Sci, Eunice, LA 70535 USA
[3] McNeese State Univ, Dept Biol & Environm Sci, Lake Charles, LA 70609 USA
来源
TEXAS JOURNAL OF SCIENCE | 2004年 / 56卷 / 03期
关键词
D O I
暂无
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
From 1984-2004 the distributional ecology of the parthenogenetic Cnemi-dophorus laredoensis (= Aspidoscelis laredoensis) complex both north and south of the Rio Grande between Amistad Reservoir and the Gulf of Mexico was studied. Although dozens of sites inhabited by clonal complex A of C. laredoensis were discovered within a few km of the river (over a geographic range in parts of Webb, Zapata, Starr and Hidalgo counties, Texas, and Tamaulipas State, Mexico), the species was observed at only three sites in two Texas counties that were widely removed and apparently disjunct from the river-centered zone. In order to better understand what factors limit the distribution of C. laredoensis A, these three most distant sites from the Rio Grande (55.5 to 75.5 km) where this hybrid-derived species is in syntopy with maternal progenitor C. gularis (= Aspidoscelis gularis): Catarina, Dimmit County, and Encinal and Artesia Wells, La Salle County, Texas were studied. Each peripheral site was characterized by sandy substrate that is known to be one of the most important requirements for C laredoensis A. The relative amounts of the original thorn scrub vegetation favorable to C. gularis and chronically disturbed habitat favorable to C. laredoensis A at each site constituted the major determinant of the relative size of populations of the two species. The absence of C. laredoensis A north of these sites in Dimmit and La Salle counties is probably a result of ecological resistance to expansion consisting of unsuitable substrate and vegetation. There was no evidence that a low frequency of hybridization between normally parthenogenetic females of C. laredoensis A and mates of C. gularis or periodic collection of C. laredoensis A at Catarina and Artesia Wells measurably destabilized these populations.
引用
收藏
页码:237 / 252
页数:16
相关论文
共 26 条
[1]   Genetic homogeneity based on skin histocompatibility and the evolution and systematics of parthenogenetic Cnemidophorus laredoensis (Sauria: Teiidae) [J].
Abuhteba, RM ;
Walker, JM ;
Cordes, JE .
CANADIAN JOURNAL OF ZOOLOGY, 2000, 78 (06) :895-904
[2]  
Abuhteba RM, 2001, COPEIA, P262, DOI 10.1643/0045-8511(2001)001[0262:HBCCAA]2.0.CO
[3]  
2
[4]  
ABUHTEBA RM, 1990, THESIS U ARKANSAS FA
[5]  
Conant R., 1991, FIELD GUIDE REPTILES
[6]   ANIMAL PARTHENOGENESIS [J].
CUELLAR, O .
SCIENCE, 1977, 197 (4306) :837-843
[7]  
DESSAUER HC, 1989, B NEW YORK STATE MUS, V466, P49
[8]  
MCKINNEY C O, 1973, Herpetologica, V29, P361
[9]  
PARKER ED, 1989, B NEW YORK STATE MUS, V466, P72
[10]   CAN PARTHENOGENETIC CNEMIDOPHORUS-LAREDOENSIS (TEIIDAE) COEXIST WITH ITS BISEXUAL CONGENERS [J].
PAULISSEN, MA ;
WALKER, JM ;
CORDES, JE .
JOURNAL OF HERPETOLOGY, 1992, 26 (02) :153-158