Dear Attendees of the EMYS Symposium at Košice - Fauna Carpatica
Dear Attendees of the EMYS Symposium at Košice - Fauna Carpatica
Dear Attendees of the EMYS Symposium at Košice - Fauna Carpatica
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ECOLOGY AND POPULATION DYNAMICS<br />
The physiology <strong>of</strong> <strong>the</strong> energy metabolism <strong>of</strong> <strong>the</strong> European pond<br />
turtle (Emys orbicularis)<br />
SILKE SCHWEITZER 1,3 , ROLAND PRINZINGER 1 and RUDOLF WICKER 2<br />
1 Institute <strong>of</strong> Zoology, Johann Wolfgang Goe<strong>the</strong> University Frankfurt, Department<br />
„Metabolic Physiology“, Siesmayerstr. 70, 60323 Frankfurt a. M., Germany<br />
2 Zoo Frankfurt, Alfred- Brehm Pl<strong>at</strong>z 16, 60316 Frankfurt a. M., Germany<br />
3 Corresponding author for abstract [ E-mail: silkeschweitzer@web.de]<br />
The physiology <strong>of</strong> <strong>the</strong> energy metabolism <strong>of</strong> <strong>the</strong> European pond turtle (Emys<br />
orbicularis) was investig<strong>at</strong>ed with special reference to its juvenile ontogeny. We<br />
made a comparison between <strong>the</strong> metabolic r<strong>at</strong>es <strong>of</strong> h<strong>at</strong>chlings, juveniles and adults<br />
<strong>at</strong> an ambient temper<strong>at</strong>ure <strong>of</strong> 25°C. Different methods (oxygen consumption in<br />
open and closed systems) were used. The mass specific metabolic r<strong>at</strong>es (J/gxh) had<br />
a strong neg<strong>at</strong>ive correl<strong>at</strong>ion with body mass (log SW= 0,1664-0,0753 logM). The<br />
highest metabolic r<strong>at</strong>es were found in h<strong>at</strong>chlings (107 56 J/gxh), <strong>the</strong> lowest in<br />
adult turtles (1,4 0,7 J/gxh). This was expected, because h<strong>at</strong>chlings need<br />
rel<strong>at</strong>ively more energy than adults to fuel <strong>the</strong>ir development and growth. According<br />
to published values (BENNETT & DAWSON 1976), our results are in <strong>the</strong> expected<br />
range. The knowledge <strong>of</strong> <strong>the</strong> physiology <strong>of</strong> <strong>the</strong> European pond turtle can be useful<br />
in <strong>the</strong> design <strong>of</strong> managment plans and recovery programmes.<br />
POSTER PRESENTATION<br />
Is each <strong>of</strong> <strong>the</strong> females Emys orbicularis laying eggs every year in<br />
Brenne (France) <br />
JEAN SERVAN 1,3 and JEAN-JACQUES ROY 2<br />
1 Museum N<strong>at</strong>ional d'Histoire N<strong>at</strong>urelle, 36 rue Ge<strong>of</strong>froy St Hilaire, 75005 Paris, France<br />
2 Cabinet vétérinaire, 36800 Saint-Gaultier, France<br />
3 Corresponding author for abstract [E-mail: servan@mnhn.fr]<br />
After laying eggs, <strong>the</strong> next year, females can be active or inactive. If <strong>the</strong>y are active,<br />
<strong>the</strong>y are laying eggs or not. Ten females were radio-tagged after laying eggs. All<br />
<strong>the</strong>se females were active <strong>the</strong> next year. 30 females were X-rayed some days before<br />
laying. More than 90% <strong>of</strong> females had eggs in <strong>the</strong>ir abdominal cavity. Sub-adults<br />
animals with a very tenuous growth rings and an indetermined-sex individual had<br />
no egg.<br />
ORAL PRESENTATION - 20 April, 12:40 - 13:00<br />
42
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