RESUMO
This study conducted biostatistical multivariate analyses on 23 craniodental morphological measurements from 209 specimens to study interspecific variations amongst 15 bat species of the genus Myotis in Vietnam. Univariate and multivariate analyses demonstrated that the studied species can be divided into four groups as follows: extra-large-sized species (M.chinensis), large-sized species (M.pilosus, M.indochinensis and M.annectans), medium-sized species (M.altarium, M.hasseltii, M.montivagus, M.horsfieldii, M.ater, M.laniger and M.muricola) and small-sized species (M.annamiticus, M.aff.siligorensis, M.rosseti and M.alticraniatus). Our data revealed that the main craniodental features contributing to the variations in distinguishing Myotis species are the width of the anterior palatal, least height of the coronoid process, length of the upper and lower canine-premolar, zygomatic width and width across the upper canines and lower premolar-molar length. Based on patterns of morphological differences, we conducted comparisons between morphometrically closely resembling species pairs and further discussed additional characteristics that are expected to support the taxonomy and systematics of Vietnamese Myotis bats.
RESUMO
Health status of 1288 employees working at 9 paint, rubber, paper and and processing wood factories where chemicals were used in production in Ha Noi, Hai Phong and Da Nang was investigated. 93.9% of these workers exposure to chemicals. 72.2% to poison gas. 50% of factories had chemical level higher than allowed standards. 83.3% workers had chemical poison signs in 2 months previous. 54.8% had diseases related to using chemical. Rate of workers had been ill in year 2000 in these factories was 34.4%. Among them, 97.3% exposure directly with chemicals. Chemical-related disease prevalence was 89.6%. 44.4% factories did not hold health examination for employees