Literaturdatenbank
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Kopsch, G. (2006). Untersuchungen zur körperzusammensetzung von schildkröten. Unpublished thesis , Tierärztliche Fakultät der Ludwig-Maximilians-Universität München, München.
Added by: Admin (06 Jan 2014 18:24:45 UTC) |
| Resource type: Thesis/Dissertation BibTeX citation key: anon2006h View all bibliographic details  |
Categories: General Keywords: chemische Untersuchung - chemical analysis, Ernährung - nutrition, Geoemydidae, Kinosternidae, Rhinoclemmys pulcherrima, Schildkröten - turtles + tortoises, Sternotherus odoratus, Stigmochelys pardalis, Testudinidae, Testudo graeca, Testudo hermanni, Testudo horsfieldii, Veterinärmedizin - veterinary medicine Creators: Kopsch Publisher: Tierärztliche Fakultät der Ludwig-Maximilians-Universität München (München) |
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| Abstract |
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Testudinidae Geraldine Kopsch: Investigations on body composition of chelonians The present study was carried out to obtain a first view on body composition of chelonians. 92 chelonians (11 Geochelone pardalis, 3 Testudo graeca, 29 Testudo hermanni, 12 Testudo horsfieldii, 32 Sternotherus odoratus and 5 Rhinoclemmys pulcherrima) were available for analysis. Shell, femur and liver were separated from the carcasses and were analysed separately. Anatomic data were documented before determination of crude nutrients, major minerals and trace elements. Results: Anatomy: Body weight and shell weight correlated positively in a linear function for all chelonians (r²=0.99). Relative weight of shell of the tortoises (except hatchlings) was 34 % body weight, of aquatic turtles 29 % body weight and of semi-aquatic turtles 31 % body weight. Hatchlings showed a relative weight of shell of 21 % body weight. Shell length correlated positively in a linear function with both shell height (r²=0.81) and shell width (r²=0.89). Body weight correlated linearly with the absolute liver weight (r²=0.78). Relative liver weight was lower in hatchlings (1.5 % body weight) in comparison with the other chelonians (tortoises: 3.1 % body weight; aquatic turtles: 3.0 % body weight; semi-aquatic turtles: 4.2 % body weight). Analysis: 1) In all parts of the body dry matter in tortoises and semi-aquatic turtles increased with increasing age. Dry matter in body parts of aquatic turtles showed no effect of age (Tab.100). 2) Crude protein in body without shell amounted to 73.7 % dry matter in tortoises (except hatchlings), to 62.7 % dry matter in aquatic turtles and to 67.7 % dry matter in semi-aquatic turtles. Hatchlings showed 80.0 % dry matter in body without shell. In shell crude protein was only measured in juvenile, semi-adult and adult animals (tortoises: 46.1 % dry matter, aquatic turtles: 31.6 % dry matter, semi-aquatic turtles: 64.9 % dry matter). Content of protein in shell (% dry matter) correlated negatively with both shell dry matter (% original substance; r²=0.84) and calcium content in shell (g/kg dry matter; r²=0.79). 3) In body without shell the crude fat content of tortoises amounted to 2.7 % dry matter, in aquatic turtles to 11.6 % dry matter and in semi-aquatic turtles to 7.0 % dry matter. 4) Calcium content (g/kg dry matter) of semi-aquatic turtles (body without shell: 39.1; shell: 133.3; femur: 143.4; liver: -) amounted to lower than in tortoises (body without shell: 54.0; shell: 167.0; femur: 186.7; liver: 1.7) and aquatic turtles (body without shell: 57.5; shell: 247.1; femur: 221.0; liver: 3.9). Calcium/phosphorus-ratio in body without shell amounted to between 1.1 and 4.0, in shell to between 1.8 and 2.9, in femur to between 2.2 and 4.0 and in liver to between 0.1 and 0.7. 5) In shell of tortoises was found lower zinc and copper contents (zinc: 151.7; copper: 4.0; mg/kg dry matter) than in shell of aquatic turtles (zinc: 178.9; copper: 5.1; mg/kg dry matter). In liver of tortoises were found higher zinc and copper contents (zinc: 299.5; copper: 26.7; mg/kg dry matter) than in liver of aquatic turtles (zinc: 146.5; copper: 12.1; mg/kg dry matter). Copper content in shell and liver showed no effect of age. Zinc content in shell and liver of tortoises decreased with increasing age. In aquatic turtles the zinc content of shell and liver increased with increasing age. 6) Iron content in body without shell and in liver increased in all chelonians with increasing age. In shell the iron content decreased in tortoises and semiaquatic turtles with increasing age. In aquatic turtles the content increased. In femur the content of iron decreased in all chelonians with increasing age.
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