Effect of gonadal steroid hormones on the metabolic rate of the cold-acclimated gonadectomized male and female Chalcides ocellatus (Forskal).

Male and female Chalcides ocellatus were gonadectomized and cold acclimated at 15 degrees for 1 week. Lizards were injected with testosterone and estradiol, and their oxygen consumption was determined at 15 degrees. Testosterone and estradiol caused a significant increase in the whole body rate of oxygen consumption in male and female lizards, respectively.

New additions to the scorpion fauna of Riyadh region, Saudi Arabia

In this work, we present additional morphological data about the scorpion fauna of Saudi Arabia. This investigation was carried out in the central region (Riyadh) of the country and identified existing and newly discovered scorpion species for taxonomic documentation while determining the medically important ones. The survey covered the entire Riyadh region, including all major districts, and collected a total of 4,164 specimens. Morphological identification of collected animals was based on identification keys. There were two species (one with a subspecies) that belonged to the family Scorpionidae, namely Scorpio maurus kruglovi (0.02 percent) and Hemiscorpius arabicus (0.05 percent). The latter, currently, is part of the Hemiscorpiidae family that had been upgraded from a subfamily. Eight more species from the Buthidae family were found: Leiurus quinquestriatus (7.20 percent), Androctonus crassicauda (17.24 percent), Androctonus bicolor (64.60 percent), Compsobuthus arabicus (3.84 percent), Compsobuthus werneri (0.94 percent), Buthacusyotvatensis nigroaculeatus (2.31 percent), Buthacusleptochelys (3.24 percent) and Orthochirus innesi (0.55 percent). The major locations of collection were the outskirts of Riyadh city and the airport vicinity. The specimens were transported from all central region areas in 124 short trips.(AU)

Morphological identification of scorpion species from Jazan and Al-Medina Al-Munawara regions, Saudi Arabia

The present work is a complementary contribution to the comprehensive study of the scorpion sting syndrome in Saudi Arabia. It deals with the identification and determination of medically important scorpions and the other ones, which were collected from two regions (Jazan and Al-Medina Al-Munawara), based on their morphology (the molecular phylogeny and venom characteristics will appear in subsequent publications). The specimens collected from those two regions were brought to the Research Center laboratories in several batches. Morphological identification of the collected specimens was done employing identification keys. There were 646 specimens collected from Jazan Region. A single species, Nebo hierichonticus (Family Diplocentridae), and five genera with four identified species, Parabuthus liosoma, Hottentotta jayakari (salei?), Compsobuthus werneri, Leiurus quinquestriatus (Vachoniolus globimanus?), Vachoniolus spp. (other species) and Orthochirus innesi (Family Buthidae), were classified as extant scorpions in the region. Three hundred and ninety-six specimens from Al-Medina Al-Munawara Region were categorized into eight groups; four of them were identified. Three buthids, Leiurus quinquestriatus, Androctonus crassicauda, Orthochirus innesi and one scorpion specimen, Scorpio maurus, were identified and classified as extant scorpions in this region. The other four species are still not completely identified. They are Vachoniolus (Buthacus minipectinibus?) globimanus? (Unidentified-1), Compsobuthus spp (arabicus?) (Unidentified-2), Compsobuthus spp (werneri?) (Unidentified-3) and a single specimen of Androctonus spp (australis?) (Unidentified-4), all of which belong to the family Buthidae.(AU)