Models of otoacoustic emission (OAE) generation mechanisms often attribute important features of OAEs to waves traveling along the cochlear partition. Since the lizard basilar papilla manifests no obvious analog of the mammalian traveling wave, detailed characterization of lizard OAEs offers an important opportunity to test and extend our knowledge of emission mechanisms. We report otoacoustic ...

This study provides a descriptive panorama of the lizard communities on 3 islands and mainland Pacific coast Mexico, estimating effect insularity (ecological changes between lizards mainland) populations. The included number species, encounter frequency age classes. effects were estimated by comparing these variables, as well basking behavior, activity related to microclimate, perch height amon...

In rural African communities, there are widespread beliefs that epilepsy is due to possession of bewitchment by evil spirits or the devil. There is also a belief that the transmis­ sion of the disease is by physical contact, such as by sa­ liva (Osuntokun 1990:106). In central Africa, as well as in Sub-Saharan Africa, epilepsy is attributed to the presence of a lizard in the brain, and epilepti...

Many lizard lineages exhibit bodily elongation and concomitant limb reduction. This morphotype has evolved independently in numerous taxa, including amphisbaenians, anguids, cordyl ids , dibamids, diploglossids, gerrhosaurids, skinks, and teiids (Greer, 1991). Of the phylogenetic lineages that have undergone major adaptive radiations subsequent to limb loss, by far the most speciose and diverse...

The kiore or Polynesian rat (Rattus exulans) has been suggested as the probable cause for reduced reptile, seabird and invertebrate faunas on many of the northern offshore islands of New Zealand, but the evidence is largely circumstantial and it is based on comparisons between islands with and without kiore. In 1977, kiore colonised a small island in the Mokohinau Group (Hauraki Gulf), where th...

Following optic nerve crush in the adult lizard Ctenophorus ornatus, most retinal ganglion cells regrow their axons into visual brain centres: however, the regenerated projections lack retinotopic order and the animals are blind via the experimental eye. Here we have used 3H-thymidine autoradiography to demonstrate that cell division is no longer taking place in the retina of normal adult lizar...

Origin and clonal diversity of the parthenogenetic lizard Aspidoscelis rodecki (Squamata: Teiidae): chromosomal evidence. We analyzed the karyotypes of individuals of two different populations of Aspidoscelis rodecki to investigate the origin and chromosomal diversity of this unisexual lizard. The karyotype of A. rodecki has a diploid number of 50 chromosomes, and exhibits a marked structural h...

Mass bleaching of shallow-water corals was observed at Lizard Island and at other locations on the Great Barrier Reef in early 1982. In a patch-reef community at Lizard Island, mortality rates of scleractinian corals from 4 families were higher during the period of bleaching than during the previous year. It is postulated that bleaching may be the result of penetration of high levels of UV radi...

São Paulo state is renowned for its extensive research on herpetofauna. However, there are still unexplored areas within the state, creating knowledge gaps in biodiversity. This study focused Itambé cave and waterfall Altinópolis, Paulo, which an ecotone between Cerrado Atlantic Forest popular among ecotourists. The aimed to describe herpetofauna composition this area. Data collection occurred ...

We examined how autotomy–induced shifts in behavior of a diurnal lizard (Lampropholis guichenoti) and two natural snake predators influence the outcome of predatory interactions. During staged encounters in seminatural enclosures, we estimated the consumption order of lizards with recently autotomised tails (‘‘tailless’’) and intact tails (‘‘tailed’’). Tail loss increased a lizard’s chances of ...