Increasing body size at metamorphosis might also have been the
result of less TH availability in peripheral tissues. Because hind-limb
length and tail length are morphological indicators of metamorphosis
development (Miyata and Ose, 2012), the lack of TH availability
may engender hind-limb growth maintained and tail resorption
delayed, the larvae will develop into grossly deformed giants
(Rot-Nikcevic and Wassersuq, 2004). In addition, low levels of TH
will induce hind-limb growth, whereas higher concentration TH is
required for tail resorption (Furlow and Neff, 2006). Therefore, the
increasing body size at metamorphosis in larvae exposed to NO3–N
may be a direct consequence of the increase in hind-limb and tail.
Increasing body size at metamorphosis might also have been theresult of less TH availability in peripheral tissues. Because hind-limblength and tail length are morphological indicators of metamorphosisdevelopment (Miyata and Ose, 2012), the lack of TH availabilitymay engender hind-limb growth maintained and tail resorptiondelayed, the larvae will develop into grossly deformed giants(Rot-Nikcevic and Wassersuq, 2004). In addition, low levels of THwill induce hind-limb growth, whereas higher concentration TH isrequired for tail resorption (Furlow and Neff, 2006). Therefore, theincreasing body size at metamorphosis in larvae exposed to NO3–Nmay be a direct consequence of the increase in hind-limb and tail.
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