+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Reproduction growth and population structure of the central american caecilian dermophis mexicanus



Reproduction growth and population structure of the central american caecilian dermophis mexicanus



Herpetologica 36(3): 244-256



Data on the reproductive biology, growth and population structure are presented for D. mexicanus, a tropical, burrowing, viviparous caecilian. Males undergo spermatogenesis at 1 yr of age, but may not reproduce until 2 yr when numbers of spermatogenic lobules are much greater and lobe fusions occurred. Age at maturity in females is 1 yr, and most breed at the beginning of their 2nd yr. Ovarian clutch size is 13-36 ova (.hivin.x = 19.6); ova are 1.5 mm in diameter when fully yolked. Oviducal clutch size is 4-12 (.hivin.x = 7.0). Fertilization occurred from late April to early June and the gestation period was 1 yr. Fetuses grow at a decelerating rate through the year. Birth was from May through June at the beginning of the rainy season. Size at birth is 108-155 mm total length. Juveniles compose a large proportion of the population. The adult sex ratio of female to male is 1.3:1. There is no apparent external sexual dimorphism. Counts of primary annuli of clutches of fetuses are correlated with the maternal count, but secondaries show great range. Growth during the 1st yr is considerable, and decelerates through life. Adaptation for viviparity in this tropical, early maturing species, its single broods, long developmental period and long adult survivorship constitute an evolutionary mosaic when compared to other amphibians and reptiles.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 006315606

Download citation: RISBibTeXText

DOI: 10.2307/3891821


Related references

A new Eimeria sP. from the plumbeous Central American caecilian, Dermophis mexicanus (amphibia: gymnophiona) from Volcán Tajumulco, Department of San Marcos, Guatemala. Journal of Parasitology 86(2): 340-342, 2000

Mechanism of lung ventilation in the caecilian Dermophis mexicanus. Journal of Morphology 226(3): 289-295, 1995

The mechanism of concertina locomotion and burrowing in the caecilian Dermophis mexicanus. American Zoologist 35(5): 147A, 1995

Localization of nadph diaphorase and nos in the brain of the caecilian dermophis mexicanus. Society for Neuroscience Abstract Viewer & Itinerary Planner : Abstract No 849 2, 2002

Confirmation of the passive exhalation hypothesis for a terrestrial caecilian, Dermophis mexicanus. Copeia (1): 206-209, 1999

Exchanges of oxygen, carbon dioxide, nitrogen and water in the caecilian Dermophis mexicanus. Journal of Comparative Physiology B Biochemical Systemic and Environmental Physiology 170(7): 505-509, 2000

Localization of choline acetyltransferase immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus. Journal of Comparative Neurology 448(3): 249-267, 2002

Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona). Journal of Comparative Neurology 448(3): 249-267, 2002

Distribution of somatostatin-like immunoreactivity in the brain of the caecilian Dermophis mexicanus (Amphibia: Gymnophiona): comparative aspects in amphibians. Journal of Comparative Neurology 501(3): 413-430, 2007

Distribution of NADPH-diaphorase/nitric oxide synthase in the brain of the caecilian Dermophis mexicanus Comparative aspects in amphibians. Brain Behavior & Evolution 60(2): 80-100, 2002

Distribution of NADPH-diaphorase/nitric oxide synthase in the brain of the caecilian Dermophis mexicanus (amphibia: gymnophiona): comparative aspects in amphibians. Brain Behavior and Evolution 60(2): 80, 2002

A comparison of the cranial nerves and blood vessels of Dermophis mexicanus and Dermophis gregorii. Anatomischer Anzeiger 86(19/21): 321-347, 1938

Gymnophis multiplicata, Dermophis mexicanus, and Dermophis parviceps (soldas, suelda con suelda, dos cabezas, caecilians). Unknown, 1983

Structure of Scales in a Caecilian (Gymnopis mexicanus) and Their Use in Age Determination. Copeia 1962(3): 636-637, 1962

Dermophis glandulosus san isidro caecilian. Herpetological Review 42(3): 387, 2011