Ultrastructure and Characteristics of Eggshells of the Olive Ridley Turtle (Lepidochelys olivacea) from Gahirmatha, India
| Autor: | Gunanidhi Sahoo, P. Mohanty-Hejmadi, R.K. Sahoo, Birendra Kumar Mohapatra |
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| Rok vydání: | 1996 |
| Předmět: |
Histology
biology Ecology Phosphorus Aragonite chemistry.chemical_element Lepidochelys olivacea engineering.material biology.organism_classification law.invention chemistry.chemical_compound chemistry law Environmental chemistry engineering Ultrastructure Substrate (aquarium) Carbonate Anatomy Turtle (robot) Eggshell |
| Zdroj: | Cells Tissues Organs. 156:261-267 |
| ISSN: | 1422-6421 1422-6405 |
| DOI: | 10.1159/000147854 |
| Popis: | The structure of a chelonian eggshell is of prime importance for the developing embryo. It acts as a protective covering as well as mediator in the exchange of heat and water. The fresh eggshell of the olive ridley (Lepidochelys olivacea) turtle displays a variety of structural forms in their aragonite framework. Its netted substrate, loose texture and poorly organised crystallites favour the easy exchange of air and water during its development. The shell consists mostly of calcium in carbonate form and K, Mg, Fe, Ni, Pb, Zn, Co, Cr, Cu, Mn and Cd in traces. Ba and Sr in traces are also a feature of the thermal analysis graph. Phosphorus was not detected in the shell and its absence eliminates an earlier suggestion of it being a key factor in the development of aragonite crystals in the inorganic structure of marine turtle eggshells. Its combustion characteristics, which have not been previously reported, are recorded. |
| Databáze: | OpenAIRE |
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