Swordtail fish (Poeciliidae: genus Xiphophorus) are a paradigmatic case of sexual selection by sensory exploitation. Female preference for males with a conspicuous ‘‘sword’’ ornament is ancestral, suggesting that male morphology has evolved in response to a preexisting bias. The perceptual mechanisms underlying female mate choice have not been identified, complicating efforts to understand the ...

We study self-affine tiles which tile the n-dimensional real vector space with respect to a crystallographic group. First we define classes of graphs that allow to determine the neighbors of a given tile algorithmically. In the case of plane tiles these graphs are used to derive a criterion for such tiles to be homeomorphic to a disk. As particular application, we will solve a problem of Gelbri...

Title-page: [one line of Hebrew] I LIBER I PSALMORUM I EDITUS I A I JOHANNE LEUSDEN, I LINGUAE SANCTAE in ACADEMIA ULTRAJECTINA I Professore ordinario. I [ornament] I LOND/NI, I Typis S. PALMER. I Impensis R.&J.BoNWICKE, B.BARKER, S.BALLARD, & J.BATLEY. I MDCCXXVI. Collation: 18 0 ; 1t3A-2C92D62E4; $5 signed (F3 mis-signed 'F2'). Ll.[3], 240, [4]. Press figures: I on H6 v, K6 f 3 on BIv, C9f 40...

Pheromones function not only as mate attractors, but they may also relay important information to prospective mates. It has been shown that vertebrates can distinguish, via olfactory mechanisms, major histocompatibility complex types in their prospective mates. However, whether pheromones can transmit information about immunocompetence is unknown. Here, we show that female mealworm beetles (Ten...