Talk:Lizard Development
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Cite this page: Hill, M.A. (2024, June 26) Embryology Lizard Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Talk:Lizard_Development |
10 Most Recent Papers
Note - This sub-heading shows an automated computer PubMed search using the listed sub-heading term. References appear in this list based upon the date of the actual page viewing. Therefore the list of references do not reflect any editorial selection of material based on content or relevance. In comparison, references listed on the content page and discussion page (under the publication year sub-headings) do include editorial selection based upon relevance and availability. (More? Pubmed Most Recent)
Lizard Development
<pubmed limit=5>Lizard Development</pubmed>
Lizard Embryology
<pubmed limit=5>Lizard Embryology</pubmed>
2013
2012
2011
Patterns of interspecific variation in the heart rates of embryonic reptiles
PLoS One. 2011;6(12):e29027. Epub 2011 Dec 13.
Du WG, Ye H, Zhao B, Pizzatto L, Ji X, Shine R. Source Key Laboratory of Animal Ecology and Conservational Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China. duweiguo@ioz.ac.cn
Abstract
New non-invasive technologies allow direct measurement of heart rates (and thus, developmental rates) of embryos. We applied these methods to a diverse array of oviparous reptiles (24 species of lizards, 18 snakes, 11 turtles, 1 crocodilian), to identify general influences on cardiac rates during embryogenesis. Heart rates increased with ambient temperature in all lineages, but (at the same temperature) were faster in lizards and turtles than in snakes and crocodilians. We analysed these data within a phylogenetic framework. Embryonic heart rates were faster in species with smaller adult sizes, smaller egg sizes, and shorter incubation periods. Phylogenetic changes in heart rates were negatively correlated with concurrent changes in adult body mass and residual incubation period among the lizards, snakes (especially within pythons) and crocodilians. The total number of embryonic heart beats between oviposition and hatching was lower in squamates than in turtles or the crocodilian. Within squamates, embryonic iguanians and gekkonids required more heartbeats to complete development than did embryos of the other squamate families that we tested. These differences plausibly reflect phylogenetic divergence in the proportion of embryogenesis completed before versus after laying.
PMID 22174948
Sex differences in sand lizard telomere inheritance: paternal epigenetic effects increases telomere heritability and offspring survival
PLoS One. 2011 Apr 22;6(4):e17473.
Olsson M, Pauliny A, Wapstra E, Uller T, Schwartz T, Blomqvist D. Source School of Biological Sciences, University of Sydney, Sydney, New South Wales, Australia. molsson@uow.edu.au
Abstract
BACKGROUND: To date, the only estimate of the heritability of telomere length in wild populations comes from humans. Thus, there is a need for analysis of natural populations with respect to how telomeres evolve. METHODOLOGY/PRINCIPAL FINDINGS: Here, we show that telomere length is heritable in free-ranging sand lizards, Lacerta agilis. More importantly, heritability estimates analysed within, and contrasted between, the sexes are markedly different; son-sire heritability is much higher relative to daughter-dam heritability. We assess the effect of paternal age on Telomere Length (TL) and show that in this species, paternal age at conception is the best predictor of TL in sons. Neither paternal age per se at blood sampling for telomere screening, nor corresponding age in sons impact TL in sons. Processes maintaining telomere length are also associated with negative fitness effects, most notably by increasing the risk of cancer and show variation across different categories of individuals (e.g. males vs. females). We therefore tested whether TL influences offspring survival in their first year of life. Indeed such effects were present and independent of sex-biased offspring mortality and offspring malformations. CONCLUSIONS/SIGNIFICANCE: TL show differences in sex-specific heritability with implications for differences between the sexes with respect to ongoing telomere selection. Paternal age influences the length of telomeres in sons and longer telomeres enhance offspring survival. PMID 21526170
Reptilian spermatogenesis: A histological and ultrastructural perspective
Spermatogenesis. 2011 Jul;1(3):250-269. Epub 2011 Jul 1.
Gribbins KM. Source Department of Biology; Wittenberg University; Springfield, OH USA.
Abstract
Until recently, the histology and ultrastructural events of spermatogenesis in reptiles were relatively unknown. Most of the available morphological information focuses on specific stages of spermatogenesis, spermiogenesis, and/or of the mature spermatozoa. No study to date has provided complete ultrastructural information on the early events of spermatogenesis, proliferation and meiosis in class Reptilia. Furthermore, no comprehensive data set exists that describes the ultrastructure of the entire ontogenic progression of germ cells through the phases of reptilian spermatogenesis (mitosis, meiosis and spermiogenesis). The purpose of this review is to provide an ultrastructural and histological atlas of spermatogenesis in reptiles. The morphological details provided here are the first of their kind and can hopefully provide histological information on spermatogenesis that can be compared to that already known for anamniotes (fish and amphibians), birds and mammals. The data supplied in this review will provide a basic model that can be utilized for the study of sperm development in other reptiles. The use of such an atlas will hopefully stimulate more interest in collecting histological and ultrastructural data sets on spermatogenesis that may play important roles in future nontraditional phylogenetic analyses and histopathological studies in reptiles.
PMID 22319673
<pubmed>19645023</pubmed>
PMID 19645023
http://onlinelibrary.wiley.com/doi/10.1002/ar.20945/full
Species | Embryonic series covered | Source |
---|---|---|
Iguania | ||
Agamidae | ||
Agama impalearis | Pre- and post-oviposition | Mouden et al. (2000) |
Calotes versicolor | Post-oviposition | Muthukkaruppan et al. (1970) |
Pre-oviposition | Thapliyal et al. (1973) | |
Chamaeleo lateralis | Pre- and post-oviposition | Blanc (1974) |
Chamaeleo bitaeniatus | Post-oviposition | Pasteels (1956) |
Post-oviposition | Milaire (1957) | |
Iguanidae | ||
Anolis sagrei | Pre- and post-oviposition | Sanger et al. (2008b) |
Liolaemus t. tenuis | Pre-oviposition | Lemus and Duvauchelle (1966) |
Post-oviposition | Lemus et al. (1981) | |
Liolaemus gravenhorstii | Pre- and post-oviposition | Lemus (1967) |
Scleroglossa | ||
Lacertidae | ||
Lacerta viridis | Post-oviposition | Dhouailly and Saxod (1974) |
Podarcis (Lacerta) agilis | Pre- and post-oviposition | Peter (1904) |
Post-oviposition | Rieppel (1994) | |
Podarcis (Lacerta) muralis | Post-oviposition | Dhouailly and Saxod (1974) |
Podarcis (Lacerta) vivipara | Intra-uterine | Dufaure and Hubert (1961) |
Scincidae | ||
Mabuya megalura | Intra-uterine | Pasteels (1956) |
Anguidae | ||
Anguis fragilis | Cleavage | Nicolas (1904) |
Gastrulation and neurulation | Ballowitz (1905) | |
Neurulation to closure of the amnion | Meyer (1910) | |
Serpentes | ||
Python sebae | Post-oviposition | Boughner et al. (2007) |
Natrix natrix | Uncertain | Krull (1906) |
Uncertain | Vielhaus (1907) | |
Natrix tesselata | Uncertain | Korneva (1969) |
Thamnophis s. sirtalis | Intra-uterine | Zehr (1962) |
Naja kaouthia | Post-oviposition | Jackson (2002) |
Vipera aspis | Intra-uterine | Hubert and Dufaure (1968) |
Scincidae | ||
Hemiergis spp. | Intra-uterine (incomplete coverage) | Shapiro (2002) |
Gekkonidae | ||
Hemidactylus turcicus | Post-oviposition (incomplete coverage) | Werner (1971) |
Paroedura picta | Post-oviposition | Noro et al. (2009) |
Ptyodactylus hasselquistii guttatus | Post-oviposition (incomplete coverage) | Werner (1971) |
Sphaerodactylus argus | Post-oviposition (incomplete coverage) | Werner (1971) |
Historic
- Text-Book_of_the_Embryology_of_Man_and_Mammals