Gobiidae is the most specious fish family in the world with almost 2 000 species, however only 11% of them have been described for their larval stages. The entire life cycle information is essential to understand the biology and ecology of this important fish group. Previous studies on zooplankton samples from Ensenada de La Paz, México, have shown the presence of several Gobiidae larvae and ju...

SYNOPSIS. McCord and Allen (1917) found that extracts of mammalian pineal glands contain a potent contracting agent of larval amphibian melanophores. Lerner and his co-workers determined the chemical structure of this principle and named it melatonin. This agent contracts dermal melanophores at a concentration as low as 10" g/ml. Both intact and eyeless larval amphibians blanch when placed in t...

Albinism and leucism are phenotypes resulting from impaired melanin pigmentation in the skin appendages. However, of eyes remains unaffected leucism. Here, using transmission electron microscopy, we show that leucistic morph Texas rat snake ( Pantherophis obsoletus lindheimeri ) lacks both melanophores xanthophores its exhibits a uniform ivory white color generated by iridophores collagen fiber...