istorically speaking divorce is a relatively recent phenomenon. Divorce has become more important over the last century and has undoubtedly had an impact on the social reproduction strategies typically linked to marriage. In this paper use is made of the concept of Assortative Mating to explore if initial and subsequent marriage partner choices differ on the basis of heterogamy. This research question is formulated in terms of two contrasting hypotheses: (1) the learning and (2) the marriage market hypotheses (Gelissen 2004). These two perspectives form the basis of the theoretical framework used in the empirical analyses reported. Here logistic and linear regression and log-linear modelling techniques are used. The data used to test the learning and marriage market hypotheses contains information on all officially recorded marriages in the Czech Republic over a ten year period (1994-2004) gathered by the Czech Statistical Office. The results presented reveal that divorce changes the socially reproductive aspects of marriage choice strategies, and these changes vary systematically on the basis of gender. Whereas first and subsequent marriage choices are very similar for men, repeated marriage choices for women are on the whole more diverse. A number of explanations explaining this gender based difference are presented. These explanations centre on dissimilarities in the context of repeated choices for men and women., Petr Fučík., 5 grafů, 2 tabulky, Obsahuje bibliografii, and Anglické resumé
A sample from a photograph competition of award-winning shots taken through the mobile fluorescence microscope at the Faculty of Science Charles University in Prague, arranged by students of the Bedřich Schwarzenberg´s Forestry School, Písek. and Lenka Polanská.
Ruavermis mikebargeri gen. et sp. n. infects the yellow-headed temple turtles Heosemys annandalii (Boulenger et Robinson) in the Mekong River Basin. It resembles Platt Roberts et Bullard, 2018 and Coeuritrema Mehra, 1933 by having the anterior to posterior anatomical sequence of a ventral sucker, external seminal vesicle, cirrus sac, anterior testis, ovary, transverse vitelline duct, and posterior testis. These genera are further similar by having the combination of an elongate/ovoid aspinous body, a ventral sucker at the level of the body constriction, an oesophagus that terminates in the anterior 1/5 of the body and that is ventral to the anterior nerve commissure, intestinal caeca that bifurcate in the anterior 1/3 of the body (not immediately anterior to the ventral sucker), a sinistral caecum that bends toward the midline at level of the cirrus and common genital pore, an external seminal vesicle that abuts the anterodextral margin of the cirrus sac, an oviduct that emerges from the dextral margin of the ovary, and an oviducal seminal receptacle that comprises the middle portion of the oviduct. These genera lack lateral oesophageal diverticulae and a median oesophageal diverticulum. The new genus is unique by having a papillate ventral body surface, an external seminal vesicle lateral to the cirrus sac, vasa efferentia that are ventral to the gonads, an oviduct that is convoluted, a Laurer's canal pore that is preovarian, a Laurer's canal that extends anterolaterad, and an excretory vesicle that is Y-shaped. The 28S rDNA phylogenetic analysis recovered the new species sister to Coeuritrema platti Roberts et Bullard, 2016, with that clade sister to Hapalorhynchus spp. and Platt spp. The new turtle blood fluke is the fourth from Vietnam, second from a Vietnam geomydid, and first from Heosemys Stejneger as well as the first endohelminth from the yellow-headed temple turtle., Haley R. Dutton and Stephen A. Bullard., and Obsahuje bibliografii
Knihovna Národního muzea Praha CZ 45 D 32 adl. 1, Knihovna Národního muzea Praha CZ 49 C 14 adl. 29, Knihovna Akademie věd ČR Praha CZ TF 347 adl. 47, Královská kanonie premonstrátů na Strahově - Strahovská knihovna Praha CZ AB VIII 44 adl. 34, Královská kanonie premonstrátů na Strahově - Strahovská knihovna Praha CZ FK I 26 adl. 2, Královská kanonie premonstrátů na Strahově - Strahovská knihovna Praha CZ CF VIII 55 adl. 2, Národní knihovna ČR Praha CZ 65 E 3209, Národní knihovna ČR Praha CZ 52 C 17 adl. 19, Národní knihovna ČR Praha CZ 52 F 83 adl. 5, Metropolitní kapitula u sv. Víta v Praze Praha CZ L. b. 17, Österreichische Nationalbibliothek Wien AT 500.311-B, and BCBT41330