No full-text available
To read the full-text of this research,
you can request a copy directly from the authors.
Biologia i ochrona żółwia błotnego Emys orbicularis w województwie radomskim
... W czasie tych programów dane o biologii żółwia zbierano w sposób niesystematyczny, ale już wstępne obserwacje sugerowały, że sytuacja tego gatunku nie jest tak dramatyczna, jak początkowo sądzono -np. w 1992 roku w dolinie Zwoleńki zaobserwowano migrujące do zbiorników wodnych młode żółwie (Zemanek 1992, Zemanek i Mitrus 1997, także w Sobiborskim Parku Krajobrazowym został w 1992 roku złowiony jeden żółw w wieku około 1 roku (obserwacja własna, niepublikowana). Obserwacje te dowodziły, że w Polsce w warunkach naturalnych żółw rozmnaża się przynajmniej w niektórych latach. ...
... Śmiertelność żółwi z północnej części areału występowania wynika głównie z niekorzystnych czynników środowiskowych w czasie zimowania (Ultsch 1989 Oszacowanie przeżywalności żółwi w wieku do trzech lat może być obarczone dużym błędem ze względu na małą liczbę odłowionych osobników. Na oszacowanie przeżywalności, tempa wzrostu i wielkości żółwi w wieku 3-9 lat wpływ mogą mieć prowadzone wcześniej działania w ramach programu czynnej ochrony żółwia błotnego (Zemanek 1992, Zemanek i Mitrus 1997. W latach 1990-1997 żółwie wypuszczane nie były znakowane, co uniemożliwia stwierdzenie, które z nich pochodzą z hodowli (Mitrus 2000). ...
... w którym należy otoczyć lęgowisko -należałoby to zrobić dopiero po złożeniu jaj przez ostatnie samice. Może być to zbyt późno, ponieważ okres składania jaj przez żółwia błotnego trwa nawet dwa tygodnie (Zemanek i Mitrus 1997), a w wielu badaniach najwięcej zniszczonych złóż stwierdzono w ciągu kilku dni od złożenia (Snow 1982, Congdon i in. 1993, Escalona i Fa 1998. ...
... At present in Poland there are only three areas (north, east and west Poland) (Fig. 2) where the mud turtle reproduces successfully, sporadically or regularly (Gos lawski & Rybacki pers. com., Jab loński 1992b;Zemanek 1992;Zemanek & Mitrus 1997;So ltys 2002;Mitrus & Zemanek 2004;Najbar & Szuszkiewicz 2006;Najbar 2008). In the remaining areas mostly few adult individuals are seen, whose number decreases from year to year. ...
Emys orbicularis is receding from Europe, mainly due to anthropogenic habitat changes. Its parasite, Placobdella
costata, is widely distributed within both the former and the present distribution range of the host. Though closely associated
with the mud turtle, it may have other hosts (birds, amphibians, reptiles). Its reproductive period coincides with that of
its host’s migration to the breeding grounds, thus facilitating dispersal of the parasite. Based on literature data we have
analyzed the geographic spread of P. costata and mud turtle to observe the possible overlap of their habitats. Observations
on the population of mud turtle and the associated leech species (P. costata) were carried out in eastern Poland – Podlasie
Lowland. The studies were conducted in spring and summer in 1986–1993. The leeches were collected from the turtles caught
in the water and on land. Observations showed that most leeches were found on turtles inhabiting the lake or moving to
a breeding area. The greatest intensity of invasion was observed in June and July and that most leeches were observed
in female E. orbicularis characterized by greater length of the carapace and weight, compared with males and juvenile
individuals.
... The young tortoises hatch between mid-August and mid-September (Lukina, 1971;Mitrus & Zemanek, 1998Schneeweiss et al., 1998). Hatchlings may emerge from the nest by the end of the summer (Schneeweiss et al., 1998;Zemanek & Mitrus, 1997) or even in late October (Mitrus & Zemanek, 2000). Some neonates may overwinter in nests (Kotenko & Fedorchenko, 1993;Servan, 1983-in Servan, 1998Schneeweiss & Jablonsky, 2000). ...
... Dane o lokalizacji złóż jaj żółwia błotnego były gromadzone od 1987 r. do 2002 r. w trakcie programu czynnej ochrony tego gatunku (Zemanek, Mitrus 1997). Żółwie były indywidualnie znakowane, w związku z tym możliwe było rozpoznawanie poszczególnych osobników składających jaja. ...
... Research carried out in the 1980s and 1990s showed that, in the northern part of the distribution area, embryos did not complete their development or overwintering hatchlings died because of severe frost (Zemanek, 1991;Andreas & Paul, 1998;Najbar & Szuszkiewicz, 2005). Nevertheless, evidence of successful reproduction was found for example in central Poland (where hatchlings were recorded in spring, Zemanek & Mitrus, 1997) as well as in Germany (Andreas et al., 1996). Based on summer temperatures in Poland, Zemanek (1991) estimated that E. orbicularis could have successfully reproduced in 23 out of 57 seasons between 1931 and 1988. ...
We have analyzed long-term (1987–2011) data on the reproduction of the turtle Emys orbicularis in western and central Poland. In contrast to earlier evidence, which suggested that E. orbicularis rarely reproduces successfully in the northern part of its distribution area, we document successful reproduction in at least 16 out of the last 20 seasons, including annual reproduction since 1998. Hatchlings emerged either in late summer or autumn, or overwintered in nests and emerged between late February and May of the following year.
... At present in Poland there are only three areas (north, east and west Poland) (Fig. 2 ) where the mud turtle reproduces successfully, sporadically or regularly (Goss lawski & Rybacki pers. com., Jabb lo´nskilo´nski 1992b; Zemanek 1992; Zemanek & Mitrus 1997; So ltys 2002; Mitrus & Zemanek 2004; Najbar and Szuszkiewicz 2006; Najbar 2008 ). In the remaining areas mostly few adult individuals are seen, whose number decreases from year to year. ...
Emys orbicularis is receding from Europe, mainly due to anthropogenic habitat changes. Its parasite, Placobdella costata, is widely distributed within both the former and the present distribution range of the host. Though closely associated with the mud turtle, it may have other hosts (birds, amphibians, reptiles). Its reproductive period coincides with that of its host's migration to the breeding grounds, thus facilitating dispersal of the parasite. Based on literature data we have analyzed the geographic spread of P. costata and mud turtle to observe the possible overlap of their habitats. Observations on the population of mud turtle and the associated leech species (P. costata) were carried out in eastern Poland – Podlasie Lowland. The studies were conducted in spring and summer in 1986–1993. The leeches were collected from the turtles caught in the water and on land. Observations showed that most leeches were found on turtles inhabiting the lake or moving to a breeding area. The greatest intensity of invasion was observed in June and July and that most leeches were observed in female E. orbicularis characterized by greater length of the carapace and weight, compared with males and juvenile individuals.
The paper deals with the nesting behavior of the European pond turtle (Emys orbicularis) in South Lithuania. The known nesting areas were intensively searched each day in the summer of 1997 and for one week in the summer of 1998. Nesting began on 7th of June and ended on 22th of June in 1997, while nesting in 1998 started at least seven days earlier. The migrations of females, their search behaviour and the duration of nesting were recorded. Covered distances by females ranged in both years from 150 to 1000 m. Nesting occurred in the evening and in two cases in the afternoon. Searching behaviour performed by females before selecting a site to dig and lay eggs could continue more than a day. Nest construction lasted from 70 to 250 min.
Some aspects of the nesting ecology of the European pond turtle (Emys orbicularis) were investigated in the summer of 1997 and for one week in the summer of 1998 in South Lithuania. In the study area 3 nesting areas lie 150–1000 m distant from the main pond where turtles live. All nesting areas are in front of a pinewood and have a southeast or south-west exposition. Nests were known if they were observed directly or from the evidence of digging. Females nested in open areas on sandy ground 1–5 m away from the nearest tree. The mean clutch size averaged 12.5 eggs and the mean depth of the nests averaged 12.3 cm in 1997.
ResearchGate has not been able to resolve any references for this publication.