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  • Author: M. Ghazali x
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Extra Upper Premolars in a Specimen of Myotis Blythii (Chiroptera, Vespertilionidae)

Extra Upper Premolars in a Specimen of Myotis blythii (Chiroptera, Vespertilionidae). Ghazali M. A. — A case of extra upper premolars is described in a specimen of Myotis blythii from Kerch peninsula (Ukraine, Crimea). Additional teeth are situated near the third premolars from both sides of the jaw. Giving into account their size and position it was supposed that they appear as a result of complete splitting of the third premolar primordium.

Identification of Myotis Blythii and M. Myotis (Chiroptera, Vespertilionidae) from Eastern Europe Based on the Measurements of Lower Teeth

Since the shape of lower teeth is similar in Myotis species, it was the size that was used for differentiation between them. Canonical variates analysis was used to determine the possibility of discrimination between M. blythii Tomes, 1857 and M. myotis Borkhausen, 1797 based on lower teeth. The lengths and widths of canines, premolars and molars were measured. More than 89% of the specimens were correctly classified in the models built using measurements of each tooth separately ("one-tooth" models). Better result was obtained for different combinations of the teeth. The largest and the most frequent in the fossils teeth (c inf., p/4, m/1, m/2, and m/3) were chosen for "several-teeth" models. Sets of three teeth maximize the discriminatory power almost to 100%.

Absract

We studied 8 skull and 42 dental characters in nine Myotis species (M. myotis, M. blythii, M. bechsteinii, M. dasycneme, M. emarginatus, M. nattereri, M. daubentonii, M. brandtii, M. mystacinus) to analyze correlations between hardness of food and skull and dental traits. Contrary to the common bat pattern, Myotis that are specialized on hard-shelled dietary items tend to have relatively narrow skull and long tooth rows. The dentition of durophagous Myotis is composed by relatively enlarged second and reduced third molars.

Results of the Winter Bat Census in Two Sites of the Central Podolia (Ukraine)

In February 2009 a full bat census in GMN- and IVK-mines (Khmelnytsky Oblast) was done. In total, 4801 individuals of 10 species were counted: 2438 of 7 sp. in GMN-mines and 2364 of 9 sp. in IVK-mines. The carried work is the first experience of a full bat census in considerable by length underground systems (29 and 11 km correspondingly) in Ukraine. Examination of GMN-mines took 77,5 man-hours; IVK-mines, ca. 50 man-hours. The obtained results will be at a base of the further bat monitoring in these two sites.

Abstract

Water stress, which limits the distribution and productivity of durum wheat (Triticum durum Desf.) in the Mediterranean region, is also considered to be a major factor reducing yield in semiarid regions. Improving drought resistance is thus an important objective in plant breeding programs for rainfed agriculture. The current study was carried out to identify drought-tolerant durum wheat lines among 10 lines and one variety (Douma1, the control) in the first and second settlement zones in the Southern part of Syria and to recognize the most important physiological parameters associated with drought tolerance. Membrane stability index, chlorophyll (chl) content, relative water content and chl fluorescence were recorded at the vegetative and anthesis stages, as were yield and yield components. Data recorded at vegetative and anthesis stages in both zones showed that there were significant differences between all lines growing in the first and second settlement zones and that all characters in the second zone were significantly lower than those in the first zone. Line 1 was superior to Douma1 in terms of membrane stability index, relative water content, chl content and chl florescence, also showing better yield and higher total plant biomass, tiller number/m2, 1000 grain weight and grain number/ear than the control. The ability of wheat cultivars to perform reasonably well in variable rainfall and water-stressed environments is an important trait since it allows for stable production under drought stress. Moreover, prior to genetic manipulation, it is important to characterize the physiological parameters of known drought-tolerant or drought-sensitive wheat cultivars with the objective of better understanding their physiological responses under drought