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Citazione:
Messaggio inserito da AleeHali
Ciao,
Guarda, l'unica cosa che ti posso dire e' che un umidita' alta puo' avere un unico effetto su un piccola sulcata: farla crescere NON piramidalizzata!!! Lo so che sembra un assurdo, ma quello che scrivo e' il risultato di un esperimento fatto in Austria nel 2003 su 50 esemplari suddivisi in gruppi. Lo studio e' servito a scoprire questo fatto curioso, e completamente in contrasto con le "credenze popolari".
Ciao
AleeHali
Citazione:
Messaggio inserito da AleeHali
Wiesner & Iben 2003, in "Journal of animal physiology and animal nutrition" vol. 87, ISSN 0931-2439.
Questo e' l'abstract:
The carapaces of captive-raised tortoises (terrestrial chelonians of the zoolgical family testudinidae) often develop pyramidal shaped osseous growth centrally within the horny plates. With very few exceptions (e.g. Geochelone elegans, Psammobates spec.) this conical growth pattern is considered to be pathologic. This very common defect is believed to be an important indicator of the quality of captive tortoise management. This study was designed to examine the effect of dietary protein level and environmental humidity on the degree of pyramidal growth in the carapaces. Fifty recently hatched African spurred tortoises (Geochelone sulcata) were raised for five months under artificial conditions of varying environmental humidity and dietary protein content (14 % vs. 19 % vs. 30 % crude protein in dry matter). Humps of the carapaces that developed and blood values of calcium, phosphorus and hematocrit were measured and compared among groups. Dry environmental conditions (24.3-57.8 % and 30.6-74.8 % relative humidity) produced taller humps than humid conditions (45-99 % relative humidity). Hump formation differed significantly (p£0.001) between these 3 groups kept under different humidity conditions. Variable dietary protein had a minor, positive impact on this pathological formation of humps (Pyramidal Growth Syndrom, PGS). Analysis of blood (calcium, phosphorus, hematocrit) offered no further explanation as to the development of the humps.
Ho in programma di prenderlo, ma la lista della carta da comprare e' praticamente infinita...![]()
Ciao
AleeHali
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