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Feria Ortiz M, Pérez-Malváez C, Bribiesca Escutia G, Ramírez Morales EA. DIMORFISMO SEXUAL EN TAMAÑO Y FORMA EN UNA POBLACIÓN DE ESCÍNCIDOS DE COLA AZUL DEL GÉNERO Plestiodon (SCINCIDAE). ACTA BIOLÓGICA COLOMBIANA 2021. [DOI: 10.15446/abc.v26n3.88388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
En este estudio, investigamos el dimorfismo sexual en el tamaño corporal (longitud hocico cloaca) y rasgos morfológicos (cabeza, cuello, tronco y extremidades) en una población de escíncidos pertenecientes a una especie recién descubierta del género Plestiodon. Además, se determinaron las trayectorias alométricas de los rasgos corporales que mostraron dimorfismo sexual y se discute su importancia en la expresión de las diferencias sexuales encontradas. Se realizó una prueba de t de student para detectar diferencias significativas en la LHC y se siguió un enfoque multivariado para investigar el dimorfismo sexual en los otros caracteres examinados. Se utilizó regresión por ejes principales reducidos (SMA) para determinar las trayectorias alométricas correspondientes. No se detectó dimorfismo sexual en la longitud hocico cloaca y masa corporal. La longitud y ancho de la cabeza, la longitud del cuello y la longitud de las extremidades traseras fueron mayores en machos que en hembras; en contraste, se encontró el patrón opuesto en el caso de la longitud del tronco (axila-ingle). Se detectaron relaciones isométricas, así como alométricas positivas y negativas entre los rasgos analizados. Sin embargo, únicamente el dimorfismo sexual en el ancho de la cabeza fue afectado por sus trayectorias de crecimiento.
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Jaramillo-Alba JL, Pérez-Mendoza HA, de la Vega-Pérez AHD, Akcali CK. Do Reproductive Costs Affect Adult Survival in Mexican Dusky Rattlesnakes? A Test Using Mark–Recapture Data. HERPETOLOGICA 2020. [DOI: 10.1655/herpetologica-d-19-00013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- José Luis Jaramillo-Alba
- Laboratorio de Ecología Evolutiva de Anfibios y Reptiles, Facultad de Estudios Superiores Iztacala, UNAM, Avenida de Los Barrios número 1, Los Reyes Iztacala, Tlalnepantla, Estado de México, C.P. 54090, México
| | - Hibraim Adán Pérez-Mendoza
- Laboratorio de Ecología Evolutiva de Anfibios y Reptiles, Facultad de Estudios Superiores Iztacala, UNAM, Avenida de Los Barrios número 1, Los Reyes Iztacala, Tlalnepantla, Estado de México, C.P. 54090, México
| | - Aníbal Helios Díaz de la Vega-Pérez
- Consejo Nacional de Ciencia y Tecnología–Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala, km 1.5 Carretera Tlaxcala-Puebla, C.P. 90070, Tlaxcala, México
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Ortiz MA, Boretto JM, Ibargüengoytía NR. Reproductive biology of a viviparous lizard (Mabuya dorsivittata) from the subtropical Wet Chaco of Argentina: geographical variations in response to local environmental pressures. AN ACAD BRAS CIENC 2019; 91:e20170817. [PMID: 30916147 DOI: 10.1590/0001-3765201920170817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 04/17/2018] [Indexed: 11/21/2022] Open
Abstract
Herein we studied the reproductive biology of a viviparous lizard (Mabuya dorsivittata) from the Wet Chaco region (northeastern Argentina) and compared the results with other populations from the Espinal (central Argentina) and the Atlantic Forest (southeastern Brazil), and with other Neotropical species of Mabuya to better understand the possible causes of its reproductive phenotype variation. Males and females of M. dorsivittata from the Wet Chaco exhibited associated, seasonal, and annual reproductive cycles. Spermatogenic activity related positively to a lengthening photoperiod reaching maximum activity in late spring (December). Females displayed an extended gestation period of 11 months, from mid-summer (February) to late spring or early summer (December) when births occur. Embryonic development was associated with temperature and historical rainfall. Litter size ranged from 3 to 8 (mean = 5.3 ± 1.3 SD) and increased with body size and body mass of females. Fat-body mass varied seasonally and was inversely correlated with spermatogenesis and to embryonic development. Females were larger in body size and interlimb length, and smaller in head length than males. We observed interpopulational differences in minimum body size, litter size, and timing of birth, probably as a result of phenotypic plasticity, genetic divergence or both.
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Affiliation(s)
- Martín A Ortiz
- Laboratorio de Herpetología, Facultad de Ciencias Exacta y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad, 5470, 3400 Corrientes, Argentina
| | - Jorgelina M Boretto
- Instituto de Investigaciones en Biodiversidad y Medioambiente/INIBIOMA, Consejo Nacional de Investigaciones Científicas y Técnicas/CONICET, Universidad Nacional del Comahue, San Carlos de Bariloche, 8400 Río Negro, Argentina
| | - Nora R Ibargüengoytía
- Instituto de Investigaciones en Biodiversidad y Medioambiente/INIBIOMA, Consejo Nacional de Investigaciones Científicas y Técnicas/CONICET, Universidad Nacional del Comahue, San Carlos de Bariloche, 8400 Río Negro, Argentina
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Gill BJ, Zhu A, Patel S. Post-mortem examinations of New Zealand birds. 2. Long-tailed cuckoos (Eudynamys taitensis, Aves: Cuculinae). NEW ZEALAND JOURNAL OF ZOOLOGY 2018. [DOI: 10.1080/03014223.2018.1457545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- B. J. Gill
- Auckland War Memorial Museum, Auckland, New Zealand
| | - Amy Zhu
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Selina Patel
- School of Biological Sciences, University of Auckland, Auckland, New Zealand
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Ramos-Lara N, López-González CA. Niche segregation between Sciurus aureogaster and S. oculatus in a disturbed forest in central Mexico. J Mammal 2017. [DOI: 10.1093/jmammal/gyx136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ortiz MA, Boretto JM, Ibargüengoytía NR. How does a viviparous semifossorial lizard reproduce? Ophiodes intermedius (Squamata: Anguidae) from subtropical climate in the Wet Chaco region of Argentina. ZOOLOGY 2017; 121:35-43. [PMID: 28254160 DOI: 10.1016/j.zool.2017.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 10/17/2016] [Accepted: 01/08/2017] [Indexed: 10/20/2022]
Abstract
The best predictors of reproductive patterns are commonly associated with climate factors, but evolutionary history also plays an important role. The semifossorial and viviparous lizard Ophiodes intermedius from the Wet Chaco region of Argentina showed an annual cycle with asynchrony between males and females and an unusual pattern for subtropical climates, with vitellogenesis beginning in autumn, ovulation and copulation in spring, and births occurring in summer. Males exhibited annual variation of testicular size associated with spermatogenic activity, reaching their maximum gonadal activity in late summer (March), but sperm storage in the epididymis and/or deferent duct occurred throughout the year. Females showed an extended reproductive cycle beginning in mid-autumn (May) with vitellogenesis and finishing with births from late spring to mid-summer (December to February). Litter size varied from 4 to 9 offspring. Females reached sexual maturity at a larger snout-vent length and, overall, showed greater body size than males, while males exhibited larger heads than females. Fat body cycles indicated that females use lipid reserves to support vitellogenesis and embryo development, while males allocate lipid resources to the search for females, courtship and copulation rather than to gametogenesis. Ophiodes intermedius differed from other species of the genus in litter size, gestation period, timing of birth and the minimum size at sexual maturity, probably as a result of the influence of ecological, historical and phylogenetic factors.
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Affiliation(s)
- Martín A Ortiz
- Laboratorio de Herpetología, Facultad de Ciencias Exacta y Naturales y Agrimensura, Universidad Nacional del Nordeste, Av. Libertad 5460, 3400 Corrientes, Argentina
| | - Jorgelina M Boretto
- INIBIOMA (CONICET-Universidad Nacional del Comahue), Quintral 1250, 8400 San Carlos de Bariloche, Río Negro, Argentina.
| | - Nora R Ibargüengoytía
- INIBIOMA (CONICET-Universidad Nacional del Comahue), Quintral 1250, 8400 San Carlos de Bariloche, Río Negro, Argentina
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Wu Y, Fu J, Yue B, Qi Y. An atypical reproductive cycle in a common viviparous Asia Agamid Phrynocephalus vlangalii. Ecol Evol 2015; 5:5138-47. [PMID: 26640688 PMCID: PMC4662326 DOI: 10.1002/ece3.1783] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 09/08/2015] [Accepted: 09/17/2015] [Indexed: 11/20/2022] Open
Abstract
Viviparous lizards living in cold climate of high altitude often exhibit atypical reproductive cycles, in which mating and fertilization occur synchronously and annually with parturition occurring at the end of the year. Nevertheless, detailed case studies on atypical reproductive cycles are few. Using anatomical data combined with behavioral observations, we examined the reproductive cycle of a common Asian agamid, Phrynocephalus vlangalii, from a high‐elevation area in Sichuan, China. Male spermiation of P. vlangalii occurred in May, and spermatogenesis began in June and reached a maximum in October. For females, ovulation and fertilization occurred in May, and females developed gestation and pregnancy in 3 months from June to August, without vitellogenesis during this period. Females gave birth synchronously in late August, then vitellogenesis began and lasted until May of the next year. All adult males and females were synchronized in the same reproductive condition each month. The synchronous and annual reproductive cycle of P. vlangalii clearly represents an atypical cycle. The male courtship and mating behaviors were concordant with gonadal cycle and mainly happened in May and June. Despite the short growth period for neonates, they had a high over‐winter survival rate of 84.4%, suggesting that autumn parturition did not generate high costs to this reproductive cycle. We propose that the high over‐winter survival rate of neonates is likely linked with female delayed sexual maturity, female asynchronous vitellogenesis and gestation, large relative clutch mass (RCM), and adult‐offspring burrow sharing behavior during hibernation.
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Affiliation(s)
- Yayong Wu
- Herpetological Department Chengdu Institute of Biology Chinese Academy of Sciences Chengdu Sichuan 610041 China ; College of Life Science Sichuan University Chengdu 610064 China ; University of Chinese Academy of Sciences Beijing 100049 China
| | - Jinzhong Fu
- Departments of Integrative Biology University of Guelph Guelph Ontario N1G 2W1 Canada
| | - Bisong Yue
- College of Life Science Sichuan University Chengdu 610064 China
| | - Yin Qi
- Herpetological Department Chengdu Institute of Biology Chinese Academy of Sciences Chengdu Sichuan 610041 China
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Sánchez-Hernández P, Molina-Borja M, Ramírez-Pinilla MP. Annual Reproductive Cycle in the Scincid LizardChalcides viridanusfrom Tenerife, Canary Islands. CURRENT HERPETOLOGY 2013. [DOI: 10.5358/hsj.32.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ramírez-Bautista A, Stephenson BP, Serrano Muñoz C, Cruz-Elizalde R, Hernández-Salinas U. Reproduction and sexual dimorphism in two populations of the polymorphic spiny lizardSceloporus minorfrom Hidalgo, México. ACTA ZOOL-STOCKHOLM 2013. [DOI: 10.1111/azo.12037] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aurelio Ramírez-Bautista
- Centro de Investigaciones Biológicas; Universidad Autónoma del Estado de Hidalgo; A.P. 1-69 Plaza Juárez C.P. 42001 Pachuca Hidalgo México
| | - Barry P. Stephenson
- Department of Biology; Mercer University; 1400 Coleman Ave. Macon GA 31207 USA
| | - Carmen Serrano Muñoz
- Centro de Investigaciones Biológicas; Universidad Autónoma del Estado de Hidalgo; A.P. 1-69 Plaza Juárez C.P. 42001 Pachuca Hidalgo México
| | - Raciel Cruz-Elizalde
- Centro de Investigaciones Biológicas; Universidad Autónoma del Estado de Hidalgo; A.P. 1-69 Plaza Juárez C.P. 42001 Pachuca Hidalgo México
| | - Uriel Hernández-Salinas
- Centro de Investigaciones Biológicas; Universidad Autónoma del Estado de Hidalgo; A.P. 1-69 Plaza Juárez C.P. 42001 Pachuca Hidalgo México
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Ramírez-Bautista A, Stephenson BP, Lozano A, Uribe-Rodríguez H, Leyte Manrique A. Atypical reproductive cycles in a population of Sceloporus grammicus (Squamata: Phrynosomatidae) from the Mexican Plateau. Ecol Evol 2012; 2:1903-13. [PMID: 22957191 PMCID: PMC3433993 DOI: 10.1002/ece3.310] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 05/28/2012] [Accepted: 06/05/2012] [Indexed: 11/25/2022] Open
Abstract
The spiny lizard Sceloporus grammicus (Squamata: Phrynosomatidae) is a small reptile from central México and the southern United States, occurring in a wide geographic area characterized by extensive variation in topographic and climatic regimes. Genetic variation among lineages from central México is substantial, though the extent to which this variation corresponds with life-history traits remains obscure. To address part of this puzzle, we studied a population of S. grammicus from Tepeapulco, Hidalgo, México. Male-biased sexual dimorphism was extensive in this population; males were larger than females overall, and expressed proportionately larger heads and longer limbs. Minimum size at sexual maturity was similar in the sexes (males: 43 mm; females: 42 mm). In contrast to other populations from the Central Plateau, reproductive activity of males and females was synchronous. Testicular recrudescence of adult males was initiated in October–November, and maximum testis size maintained from December to July. Female reproductive activity showed no clear seasonal pattern: females had vitellogenic follicles from October to July, and pregnant females were found throughout the year. Female body size was not related to litter size. Neither male nor female gonadal mass was correlated with any abiotic environmental variable examined. Differences in reproductive characteristics among populations of S. grammicus might be indicative of plasticity in response to local environmental conditions, local adaptation, or complex gene × environment interactions. We consider these results in the context of previously studied populations of S. grammicus from the Central Plateau and elsewhere, and propose directions for future research.
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Affiliation(s)
- Aurelio Ramírez-Bautista
- Centro de Investigaciones Biológicas, Universidad Autónoma del Estado de HidalgoA.P. 1-69 Plaza Juárez, C.P. 42001, Pachuca, Hidalgo, México
| | - Barry P Stephenson
- Department of Biology, Mercer University1400 Coleman Ave., Macon, Georgia, 31207
| | - Abraham Lozano
- Centro de Investigaciones Biológicas, Universidad Autónoma del Estado de HidalgoA.P. 1-69 Plaza Juárez, C.P. 42001, Pachuca, Hidalgo, México
| | - Héctor Uribe-Rodríguez
- Centro de Investigaciones Biológicas, Universidad Autónoma del Estado de HidalgoA.P. 1-69 Plaza Juárez, C.P. 42001, Pachuca, Hidalgo, México
| | - Adrian Leyte Manrique
- Estación Biológica, Instituto Tecnológico Superior de IrapuatoCarretera Irapuato-Silao km 12.5, s/n, Col. El Copal, C.P. 36821, Irapuato, Guanajuato, México
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Mouton PLFN, Flemming AF, Stanley E. Synchronized versus asynchronized breeding in cordylid lizards: an evolutionary perspective. J Zool (1987) 2012. [DOI: 10.1111/j.1469-7998.2012.00940.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- P. le Fras N. Mouton
- Department of Botany and Zoology; Stellenbosch University; Stellenbosch; South; Africa
| | - A. F. Flemming
- Department of Botany and Zoology; Stellenbosch University; Stellenbosch; South; Africa
| | - E. Stanley
- The Richard Gilder Graduate School; American Museum of Natural History; New York; USA
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Naya DE, Veloso C, Sabat P, Bozinovic F. Seasonal flexibility in organ size in the Andean lizard Liolaemus moradoensis. J Morphol 2010; 271:1440-5. [DOI: 10.1002/jmor.10885] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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RamÍrez-Bautista A, Dávila-Ulloa EG. Reproductive Characteristics of a Population of Sceloporus dugesii (Squamata: Phrynosomatidae) from Michoacán, Mexico. SOUTHWEST NAT 2009. [DOI: 10.1894/gc-164.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Naya DE, Veloso C, Sabat P, Bozinovic F. Seasonal flexibility of organ mass and intestinal function for the Andean lizardLiolaemus nigroviridis. ACTA ACUST UNITED AC 2009; 311:270-7. [DOI: 10.1002/jez.525] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Naya DE, Veloso C, Bozinovic F. Physiological flexibility in the Andean lizard Liolaemus bellii: seasonal changes in energy acquisition, storage and expenditure. J Comp Physiol B 2008; 178:1007-15. [PMID: 18626649 DOI: 10.1007/s00360-008-0292-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2008] [Revised: 05/26/2008] [Accepted: 06/25/2008] [Indexed: 10/21/2022]
Abstract
According to the "barrel model", an organism may be represented by a container, with input energy constraints (foraging, digestion, and absorption) symbolized by funnels connected in tandem, and energy outputs (maintenance, growth, and reproduction) symbolized by a series of spouts arranged in parallel. Animals can respond to changes in environmental conditions, through adjustments in the size of the funnels, the fluid stored inside the barrel, or the output flow through the spouts. In the present study, we investigate the interplay among these processes through the analysis of seasonal changes in organ size and metabolic rate in a lizard species (Liolaemus bellii) that inhabits extremely seasonal environments in the Andes range. We found that digestive organ size showed the greatest values during spring and summer, that is, during the foraging seasons. Energy reserves were larger during summer and autumn, and then decreased through winter and spring, which was correlated with overwintering maintenance and reproductive costs. Standard metabolic rate was greater during the high-activity seasons (spring and summer), but this increase was only noticeable at higher environmental temperatures. The ability of many lizard species to reduce their maintenance cost during the cold months of the year, beyond what is expected from temperature decrease, is probably related to their success in coping with highly fluctuating environments. Here, we demonstrate that this ability is correlated with high physiological flexibility, which allows animals to adjust energy acquisition, storing and expenditure processes according to current environmental conditions.
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Affiliation(s)
- Daniel E Naya
- Center for Advanced Studies in Ecology and Biodiversity, Departamento de Ecología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, CP 6513677, Chile.
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Ramírez-Bautista A, García-Collazo R, Guillette LJ. REPRODUCTIVE, FAT, AND LIVER CYCLES OF MALE AND FEMALE ROSE-BELLIED LIZARDS, SCELOPORUS VARIABILIS, FROM COASTAL AREAS OF SOUTHERN VERACRUZ, MEXICO. SOUTHWEST NAT 2006. [DOI: 10.1894/0038-4909(2006)51[163:rfalco]2.0.co;2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Gill BJ. Post‐mortem examination of New Zealand pigeons(Hemiphaga novaeseelandiae)from the Auckland area. NEW ZEALAND JOURNAL OF ZOOLOGY 2006. [DOI: 10.1080/03014223.2006.9518428] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Jiménez-Cruz E, Ramírez-Bautista A, Marshall JC, Lizana-Avia M, Nieto-Montes De Oca A. REPRODUCTIVE CYCLE OF SCELOPORUS GRAMMICUS (SQUAMATA: PHRYNOSOMATIDAE) FROM TEOTIHUACÁN, MÉXICO. SOUTHWEST NAT 2005. [DOI: 10.1894/0038-4909(2005)050[0178:rcosgs]2.0.co;2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Reproduction in the Boulder Spiny Lizard, Sceloporus pyrocephalus (Sauria: Phrynosomatidae), from a Tropical Dry Forest of México. J HERPETOL 2004. [DOI: 10.1670/200-01a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Martínez-Torres M, Elena Hernández-Caballero M, Alvarez-Rodriguez C, Alba Luis-Díaz J, Ortíz-López G. Luteal development and progesterone levels during pregnancy of the viviparous temperate lizard Barisia imbricata imbricata (Reptilia: Anguidae). Gen Comp Endocrinol 2003; 132:55-65. [PMID: 12765644 DOI: 10.1016/s0016-6480(02)00607-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The relationship between plasma progesterone (P(4)) levels and the formation and degeneration of the corpus luteum (CL) was assessed monthly during gestation of the viviparous lizard Barisia imbricata imbricata. Histochemical activity of the delta(5-4) isomerase 3 beta-hydroxysteroide dehydrogenase (delta(5-4)3beta-HSD) in the luteal tissue and embryonic development were also observed. Females were gravid throughout winter and great part of spring (late November or early December until late May or early June). Corpus luteum development occurred in the first third of gestation (December and January) when the embryo reached developmental stage 27. Four sequential stages were identified during development and three stages during regression of the CL. The follicular and thecal tissue participated in the formation of the luteal cell mass. According to Xavier's classification, the CL of B. i. imbricata is a subtype from Type III. The activity of delta(5-4)3beta-HSD was observed mainly in the luteal cell mass. The first degenerative changes in the CL were observed in the early second third of the gestation and continued gradually until parturition. Progesterone levels increased in early pregnancy and reached its highest level during January (3.07+/-1.04 ng/ml) when mature corpora lutea were present. Gradual diminution in progesterone concentrations occurred in the second and last third of pregnancy and coincided with advanced degenerative changes and diminution in histochemical activity of delta(5-4)3beta-HSD in the luteal tissue. These observations suggest that the CL is the major source of progesterone during pregnancy of B. i. imbricata.
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Affiliation(s)
- Martín Martínez-Torres
- Laboratorio de Biología de la Reproducción, Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Los Reyes Iztacala A.P. 314, Tlalnepantla Estado de México C.P. 54110, Mexico.
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WILSON JACKIEL, CREE ALISON. Extended gestation with late-autumn births in a cool-climate viviparous gecko from southern New Zealand (Reptilia:Naultinus gemmeus). AUSTRAL ECOL 2003. [DOI: 10.1046/j.1442-9993.2003.01293.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Parrish GR, Gill BJ. Natural history of the lizards of the three kings Islands, New Zealand. NEW ZEALAND JOURNAL OF ZOOLOGY 2003. [DOI: 10.1080/03014223.2003.9518339] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hernández-Gallegos O, Méndez-de la Cruz FR, Villagrán-Santa Cruz M, Andrews RM. CONTINUOUS SPERMATOGENESIS IN THE LIZARD SCELOPORUS BICANTHALIS (SAURIA: PHRYNOSOMATIDAE) FROM HIGH ELEVATION HABITAT OF CENTRAL MEXICO. HERPETOLOGICA 2002. [DOI: 10.1655/0018-0831(2002)058[0415:csitls]2.0.co;2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Changes in climate and in the timing of pairing of the Australian lizard, Tiliqua rugosa: a 15-year study. J Zool (1987) 2002. [DOI: 10.1017/s0952836902000420] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Reproductive Ecology of Tropidurus torquatus (Squamata: Tropiduridae) in the Highly Seasonal Cerrado Biome of Central Brazil. J HERPETOL 2002. [DOI: 10.1670/0022-1511(2002)036[0082:reotts]2.0.co;2] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Reproductive Characteristics of the Spiny Lizards, Sceloporus horridus and Sceloporus spinosus (Squamata: Phrynosomatidae) from México. J HERPETOL 2002. [DOI: 10.1670/0022-1511(2002)036[0036:rcotsl]2.0.co;2] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ramírez-Bautista A, Balderas-Valdivia C, Vitt LJ. Reproductive Ecology of the Whiptail LizardCnemidophorus lineatissimus(Squamata: Teiidae) in a Tropical Dry Forest. COPEIA 2000. [DOI: 10.1643/0045-8511(2000)000[0712:reotwl]2.0.co;2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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