02794nas a2200229 4500008004100000020001400041245010800055210006900163260000900232300001400241490000700255520208400262653001302346653001802359653001902377653002502396653002302421653003502444100001602479700002702495856004202522 2009 eng d a0011-216X00aAlbinism and Polychromatism in Some Species of Woodlice from Mediterranean Regions (Isopoda, Oniscidea)0 aAlbinism and Polychromatism in Some Species of Woodlice from Med c2009 a1045-10560 v823 a

Various forms of albinism were studied in nine species of Oniscidea from fifteen populations, Agabiformius lentus; Armadillidium granulatum; Philoscia sp.; Porcellio sp., Porcellio dalensi, Porcellio laevis; Porcellionides pruinosus, Porcellionides sexfasciatus; and Soteriscus gaditanus, reared in the laboratory for more than three years. The populations studied originated from different geographical regions, i.e., Chefchaoun, Oued Laou, Rabat, and Targha (Morocco), Berkoukech, the Faculty of Sciences of Tunis, and Tabarka (Tunisia), Athens (Greece), and Saint-Martin-du-Fouilloux (France). The specimens collected were uniform grey or dark-brownish with black eyes, and these individuals were designated wild-type, from which the laboratory populations were bred. Subsequent generations were colour-polymorphic. Some differed from the wild-type in that the body was unpigmented, or white, or orange in colour, while others showed a variegated colour polymorphism, in which partial depigmentation, or albinism affected different parts of the pleon, pereion, cephalon, and antennae, or the whole of the body, irrespective of sex. Variation was also found in the eyes, where black, red, white, or depigmented-eyed individuals were observed. The populations studied exhibited significant inter- and intraspecific variation in the number of albinistic individuals. Except for Porcellio laevis, albinism was frequent and the number of albinistic specimens changed over the period of study. The incidence of albinism was greatest in populations of Porcellionides pruinosus and P. sexfasciatus from Morocco, reaching 43% in the latter. Nevertheless, no significant relationship was found between the sort of food and the number of albinistic individuals. Examination of new progeny of a population of P. sexfasciatus gathered from the wild, showed similar high frequencies of albinistic individuals.

10aalbinism10aMediterranean10apolychromatism10aαλβινισμός10aΜεσόγειος10aπολυχρωματισμός1 aAchouri, M.1 aCharfi-Cheikhrouha, F. uhttps://www.jstor.org/stable/2774336003383nas a2200301 4500008004400000020001400044245011900058210006900177260000800246300001200254490000800266520243000274653001802704653002202722653001602744653001702760653001202777653001602789653002702805653002302832653003102855653002302886653001902909653003802928100001602966700002702982856007203009 2008 Frendh  a1631-069100aPhenetic analysis of populations of Porcellionides pruinosus (Brandt, 1833) (Crustacea, Isopoda, Oniscidea)0 aPhenetic analysis of populations of iPorcellionides pruinosusi B cMar a226-2380 v3313 a

The cosmopolitan species, Porcellionides pruinosus (Brandt, 1833), exhibited a geographical variation of its morphological features and its reproduction pattern. In fact, some Tunisian populations had a seasonal reproductive period and other ones showed a reproductive activity. A phenetic analysis has been performed to compare populations belonging to P. pruinosus from different geographical localities. For this, nineteen quantitative characters in 800 specimens of P. pruinosus issued from nine populations located in the North, the Centre, and the South of Tunisia, and one population from Athens (Greece) were studied. These populations were characterized by different reproductive behaviours. The populations of Tabarka, Korba, and Tamerza showed reproductive activity, whereas those of Garat Nâam, Raccada, Sahline, Gafsa, Rdayef, Gabès, and Athens exhibited a seasonal reproductive period. The variability of the first three axes of the principal components analysis (PCA) and their significance showed an intraspecific variability structure. The graphical representation of the population's dispersion generated by the two first axes (63.55% of the total variability) revealed a great heterogeneity among females of the different populations of P. pruinosus. The Garat Nâam population was set apart from the other ones by its cephalic width and length and also by its apophysis length. Furthermore, cephalic and uropod length separated the Garat Nâam and Tabarka populations. The dendrogram, based on Euclidean coordinates, confirms an isolation of the populations of Tabarka and Garat Nâam, exhibiting respectively reproductive activity and seasonal reproduction. However, the other populations do not show any relationship with the reproduction behaviour. They were clustered in two groups. The first one is represented by the populations of the Southeast and the West of Tunisia. The second pooled the populations of the Northeast and the Centre of Tunisia with the population of Athens (Greece). Phenetic analysis of Tunisian populations exhibits an important heterogeneity, which is worth noting. Thus, we need to complete and deepen this study by genetic analysis and crossbreeding tests in order to define the taxonomic status of these populations. To cite this article: M.S. Achouri, F. Charfi-Cheikhrouha, C. R. Biologies 331 (2008).

10aMediterranean10aphenetic analysis10apopulations10areproduction10aTunisia10avariability10aαναπαραγωγή10aΜεσόγειος10aμεταβλητότητα10aπληθυσμοί10aΤυνησία10aφαινοτική ανάλυση1 aAchouri, M.1 aCharfi-Cheikhrouha, F. uhttps://www.sciencedirect.com/science/article/pii/S1631069107003836