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Harriet the Tortoise's Birthday


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#1 Indy

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Posted 15 November 2005 - 00:25

"Harriet the tortoise hatched on the Galapagos Islands 175 years ago and it is believed she was studied by famed English naturalist Charles Darwin."

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#2 Esdy_11192

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Posted 15 November 2005 - 01:28

Pa nek joj je srecan rodjendan i neka pozivi jos toliko ... :lol: :lol: :lol:

#3 Indy

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Posted 15 November 2005 - 01:32

Ocekuje se da pozivi jos 20-tak, sto znaci sa'ranice mnoge... :lol:

#4 Esdy_11192

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Posted 15 November 2005 - 02:17

Pa oko 200 joj je valjda zivotni vek, sta li je sve ta prozivela.

Do sad je bila Geochelone elephantopus, sada se zove Geochelone nigra mada bi sad trebalo da se podeli u vise vrsta (proisteklih iz podvrsta)

Podvrste:
Geochelone nigra nigra (QUOY & GAIMARD 1824)
Geochelone nigra abingdonii (GĂśNTHER 1877)
Geochelone nigra becki (ROTHSCHILD 1901)
Geochelone nigra chathamensis (VAN DENBURGH 1907)
Geochelone nigra darwini (VAN DENBURGH 1907
Geochelone nigra ephippium (GĂśNTHER 1874)
Geochelone nigra guntheri (BAUR 1889)
Geochelone nigra hoodensis (VAN DENBURGH 1907)
Geochelone nigra microphyes (GĂśNTHER 1874)
Geochelone nigra nigrita (DUMÉRIL & BIBRON 1835)
Geochelone nigra vandenburghi (DE SOLA 1930)
Geochelone nigra vicina (GĂśNTHER 1874)

I to sve na ostrvima Galapagos !

:lol:

#5 st_jimmy

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Posted 16 November 2005 - 18:42

Cuo sam za Harriet pre neki dan .... Happy BDay Harriet!

#6 BigLebowsky

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Posted 18 November 2005 - 11:45

....cito' i ja, neka je ziva i zdrava.....samo, zivo me zanima, kako znaju koliko bilo koja kornjaca ima dina....kazu u tekstu da je Darvin doneo kad je imala 5...pa nesto se cesao i ne kapiram kako znaju....hebi ga, meni prvo palo na pamet da se najlakse izvali po zubalu, ali kornjace ga nemaju....nije mi struka, pa ako bi neko da me prosvetli, bio bih zahvalan....

#7 Esdy_11192

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Posted 18 November 2005 - 11:55

....cito' i ja, neka je ziva i zdrava.....samo, zivo me zanima, kako znaju koliko bilo koja kornjaca ima dina....kazu u tekstu da je Darvin doneo kad je imala 5...pa nesto se cesao i ne kapiram kako znaju....hebi ga, meni prvo palo na pamet da se najlakse izvali po zubalu, ali kornjace ga nemaju....nije mi struka, pa ako bi neko da me prosvetli, bio bih zahvalan....

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Mislim da sam negde procitao da moze da se otprilike odredi prema oklopu. Nesto slicno kao "godovima" ,valjda sam dobro rekao, na trupu drveta. Jer kada raste, raste i oklop.

Naravno moze da se odredi i po morfologij tj. po velicini koju je data zivotinja dostigla. Naravno ovo nije uvek tacno jer zivotinje u zarobljenistvu su uglavnom dugovecnije i "ugojenije" (stoga i malo vece) nego one u prirodnom okruzenjnu.

Videcu da napidem nesto preciznije ako nadjem.

#8 Esdy_11192

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Posted 18 November 2005 - 12:17

Bio sam (otprilike) u pravu

Evo iz jednog rada gde se proucavalo starenje Evropske (im je i kod nas) sumske kornjace (Testudio hermanii):

"An assessment of the reliability of growth rings counts for age determination in the Hermann's Tortoise Testudo hermanni"

"Authors: Bertolero, Albert; Carretero, Miguel A.; Llorente, Gustavo A.
Source: Amphibia-Reptilia, Volume 26, Number 1, 2005, pp. 17-23(7)
Publisher: Brill Academic Publishers"

"Abstract:

Growth ring counts on the shell have been widely used for age estimation in Chelonians. However, as stated by Wilson et al. (2003), most studies have applied this method without assessing its reliability by proving that 1 : 1 ratio between number of rings and real age exists. In the present study, the reliability of this method is analysed for a population of Hermann's Tortoise, Testudo hermanni introduced in the Ebro Delta (NE Spain). Age estimations were obtained from direct observations of tortoises in the field in 2000 (n = 82) together with those from photographs of the same and other individuals of the population taken between 1991 and 2001 (n= 356). A second photograph was taken at one or more years after the first one for 101 individuals. Results of Model II linear regression analysis indicated that the method was reliable only for tortoises between 0 and 7 years old, whereas tended to underestimate age for those between 8 and 11 years. Since, sexual maturity in this population is attained around 8 years (mean for both sexes), ring counts are only reliable for juveniles and subadults. Finally, it is noteworthy that the results coming for photographs were equivalent to those coming from direct observations in the field. "

Ovo je ukratko, mozes da skines ceo fajl Publikacija:
ili Fajlili Glavna pa pritisnes dugme PDF

Nisam siguan koja od prve dve adrese vodi tacno do publikacija :lol: , pa sam linkovao i glavnu...