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Przywiązanie do obszaru składania jaj przez samice żółwia błotnego Emys orbicularis (L.)
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Although this book is written completely in German, readers who are not fluent in this language should not despair. The many range maps, labeled drawings of skeletal and other parts, black-and-white-photographs of habitats in different parts of the E. orbicularis range, tables, and especially the excellent color images of the various subspecies of Emys orbicularis, provide much information by themselves. Moreover, the 23-page list of references (in small print), many of them in English, is invaluable. In these ways, the book will be a treasure in your herpetological library, especially if you love the study of turtles, as many of us do.
J. Alan Holman in Bulletin of the Chicago Herpetological Society (2003)
Inhaltsverzeichnis
1. Europäische Sumpfschildkröte, Emys orbicularis (Linnaeus, 1758) Eine Einführung
2. Evolution, Fossilbericht und Zoogeographie
2.1. Systematik und Phylogenie
2.2. Fossilbericht
2.2.1. Ursprung der Emydidae
2.2.2. Geographische Verteilung und Alter von Emys-Fossilien
2.2.3. Fossile Taxa der Gattung Emys
2.3. Zoogeographie
2.3.1. Besiedlung der Paläarktis und altweltliche Radiationen im Tertiär
2.3.2. Arealgeschichte im Quartär
2.3.3. Arealexpansion und -restriktion im Holozän
3. Verbreitung
3.1. Nordafrika
3.2. Iberische Halbinsel, Balearen und Madeira
3.3. Korsika, Sardinien, Festlands-Italien und Sizilien
3.4. West- und Mitteleuropa
3.5. Balkan
3.6. Osteuropa
3.7. Mittelasien und Kaukasus
3.8. Kleinasien
4. Beschreibung
4.1. Maße
4.2. Äußere Merkmale
4.3. Allgemeine Anatomie
4.4. Penis
4.5. Blutmerkmale
4.6. Karyotyp
4.7. Merkmalsvariation
4.7.1. Geschlechtsdimorphismus
4.7.2. Altersbedingte Variation, Jugendentwicklung
4.7.3. Jahreszeitlich und ökologisch bedingter Wandel
4.7.4. Geographische Variation und Unterarten
5. Taxonomie
5.1. Gattungs- und Artdiagnose
5.2. Unterartgliederung
6. Naturgeschichte
6.1. Biotop
6.2. Nahrung
6.3. Fortpflanzung
6.3.1. Phänologie, Eiablage
6.3.2. Nestform
6.3.3. Eier
6.3.4. Inkubationsdauer und Schlupf
6.3.5. Temperaturabhängige Geschlechtsbestimmung
6.4. Populationsdynamik
6.4.1. Populationsdichte
6.4.2. Altersstruktur
6.4.3. Geschlechterverhältnis
6.4.4. Prädatoren und Prädationsraten
6.5. Verhalten und Verhaltensrepertoire
6.5.1. Jahreszeitliche Rhythmik und Aktivität
6.5.2. Tageszeitliche Rhythmik und Aktivität
6.5.3. Orientierung
6.5.4. Fortpflanzungsverhalten
6.5.5. Territorialverhalten, Hierarchie und Lautäußerungen
7. Schriftenverzeichnis
Nest sites of the European pond turtle Emys orbicularis were marked in the Borowiec Nature Reserve (central Poland) from 1987 to 2002. In this area the turtle could lay eggs once a year. For 13 females, four to 12 nest sites per individual are known from the period studied. Spatial distribution of the sites is presented on maps. Only a small proportion of the female turtles displayed fidelity to a particular nesting sites, whilst others changed their nesting area. Even if there are nesting areas near water bodies, some of the females opt to use other sites. The results of the study suggest that, to gather accurate data about nesting areas used by the turtle, long-term studies are needed. Protection of the used as well as potential nesting areas (on which during short term studies laying was not recorded) could be important for conservation of the turtle.
A review of published data suggests that turtles (Order Testudines) resemble other previously studied vertebrate and invertebrate groups in terms of the relationships among growth trajectories, adult survival rates, and ages at maturation. For example, most turtles mature at around 70% of maximum size, as do other reptiles. Adult lifespans are proportional to age at maturity, and the relationship between these two variables is similar in turtles to that documented in other reptiles. Although the ratio of the von Bertalanffy growth constant (k) to the adult instantaneous mortality rate (M) appears to be higher than ratios reported for other animals (including squamate reptiles), the general relationship between these two variables corresponds with that seen in other reptiles. These analyses show that turtles exhibit patterns of growth, survivorship and maturation that are of the same form as those that are present in other types of organisms in which growth continues after maturity.
Recoveries of Atlantic green turtles tagged at the Ascension Island nest-ing ground confirm an exclusively Brazilian origin for the island colony and show its renesting and remigration periodicity and its site tenacity to be similar to those of the more extensively sampled Tortuguero (Costa Rica) colony. Implications of the dual origin of the Brazilian resident colony, where Ascension Island turtles mix with turtles from a Surinam breeding ground, are discussed; and the probable composite nature of Chelonia mydas, for which Ascension Island is the type locality is pointed out. SINCE Carr and Hirth (1962) reported results of the first year's tagging at the Ascension Island breeding ground of the Atlantic green turtle, Chelonia mydas mydas, work at the island has been resumed during ten successive seasons. Many of the tags have been put on during short visits to the island or by local collaborators who are unable to give equal attention to the several nesting beaches and who often work through only a part of the night. In spite of this uneven sampling, however, useful information on the reproductive ecology of the colony has accumu-lated. The present paper summarizes results to date.
