Demography of the population of Anolis aquaticus (Sauria Polychrotidae) of the La Palma stream, Puriscal, Costa Rica
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Abstract
The demography of Anolis aquaticus (Taylor 1956) was studied at La Palma Canyon of Puriscal (9º45’N, 84º27’W). A methodology based on marking, capture, recapture, predation, and recruitment was used in order to determine the population. A distribution of anoles is shown throughout the study area and the country of Costa Rica. The abundance of males, females, and juveniles is greater in the dry season. The sex ratio in the population is 1:1 and they mate throughout the year. Population abundance varies between 86-575 individuals per month. In a 2800 m2 area, a density of 307 to 2053 anoles was estimated, which is equivalent to 11-73 individuals for each 100 m2. In a 5684 m2 area, a density was estimated of 149 to 1008 individuals, corresponding to 3-18 anoles for each 100 m2 during the months of the year. The population structure is similar in males and females, and it presents a greater number of individuals in adults and a low quantity of juveniles. Three species were observed as predating A. aquaticus: one crab species and two snakes. The annual recruitment rate was 25-37%. Males are recruited in larger amounts and they have higher survival probabilities than females.
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Andrews, R. M. 1979. Reproductive effort of female Anolis limifrons (Sauria: Iguanidae). Copeia 1979:620-626.
Andrews, R. M. 1988. Demographic correlates of variable egg survival for a tropical lizard. Oecología 76:376-382.
Andrews, R. M. and Rand, A. S. 1990. Reproducción estacional y fluctuaciones poblacionales a largo plazo de la lagartija Anolis limifrons.pp. 469-476. En: Leigh E. G., Jr.,A.S. Rand y D. M. Windsor (Eds). Ecología de un bosque tropical, ciclos estacionales y cambios a largo plazo. Editorial Presencia Ltda. Colombia.
Andrews, R. M. 1991. Norops polylepis (Lagartija, Anole, Anolis Lizard) pp. 409-410. En: Janzen, D. H., (Ed). Historia Natural de Costa Rica. Editorial Universidad de Costa Rica, Costa Rica.
Campbell, H. W. 1973. Ecological observations on Anolis lionotusand Anolis poecilopus (Reptilia, Sauria) in Panamá. Am. Mus.Nat. Hist. Univ. Florida. No. 2516 N. Y. 29p.
Krebs. C. J. 1999. Ecological Methodology. University of British Columbia. Harper & Row, Publishers. New York.76 Demografía de la población de Anolis aquaticus.
Fitch, H. S. 1970. Reproductive Cycles of lizards and snakes Occasional Papers. Museum of Natural History, University of Kansas 52:1-247.
Fitch, H. S. 1973. Population structure and survivorship in some Costa Rican lizards.
Occasional Papers. Museum of Natural History, University of Kansas 18:1-41.
Fitch, H. S. 1975. Sympatry and interrelationships in Costa Rica anoles. OccasionalPapers. Museum of Natural History, University of Kansas 40: 1-60.
Fleishman, L. J. 1986. Motion detection in the presence and absence of Backgroundmotion in an Anolis lizard. Jour. Comp.Physiol. 159:711-720.
Fleishman, L. J. 1986. 1988. The social behavior of Anolis auratusa grass Anole from Panamá. J. Herp. 22:13-23.
Gómez, L.D. 1986. Vegetación de CostaRica. Editorial Universidad Estatal a Distancia. San José, Costa Rica. 327 p.
Guyer, C. 1986. Seasonal reproduction patterns of Norops humilis (Sauria: Iguanidae)in Costa Rica. Rev. Biol. Trop. 34:247-251.
Guyer, C. 1988. Food supplementation in a tropical Mainland Anoles, Norops humilis effect on individuals. Ecology 69:362-369.
Herrera, W. 1985. Clima de Costa Rica. Edito-rial Universidad Estatal a Distancia. San José, Costa Rica 118 p.
Leal, M. and Losos, J. B. 2000. Bobos Chamaleolis barbatusand C. porcus.J. Herpetol.34:318-322.
Márquez, C. 1994. Historia natural de A. aquaticusTaylor 1956 (Sauria:Polychridae) enla quebrada La Palma, Puriscal San José,Costa Rica. Tesis de Maestria UCR, C.R.108pp.
Márquez, C., Mora, J. M., Bolaños, F. y Rea, S.2005. Aspectos de la biología poblacional en el campo de Anolis aquaticus, (Sauria:Polychridae) en Costa Rica. Ecol. Apl. Vol.4 No 1 y 2, pp 59-69.
Taylor, E. H. 1956. A review of the lizards of Costa Rica Univ. Kansas Sci. Bull. 38: I-322.
Tinkle, D. W. 1967. The life and demography of the side- blotched lizard, Uta stansburiana. Misc. Publ. Mus. Zool. Univ. Mich.132:1-182.
Trivers, R. L. 1976. Sexual selection and resource accruing abilities in Anolis garmani.Evol. 30:253-269.
Valerio, C. E. 1991. La diversidad Biológica de Costa Rica. Editorial Heliconia. Fundación Neotrópica, San José, Costa Rica. 153 p.
Zar, J. H. 1984. Biostatistical analysis. SecondEd. Prentice -Hall, Englewood Cliffs, N.J.718p