...Nicola S. Heckeberg; Philip S. L. Anderson; Emily J. Rayfield ABSTRACT Extreme phenotypic polymorphism is an oft-cited example of evolutionary theory in practice. Although these morphological variations are assumed to be adaptive, few studies have biomechanically tested such hypotheses. Pyrenestes...

...Abel Bernadou; Antoine Felden; Mathieu Moreau; Pierre Moretto; Vincent Fourcassié ABSTRACT We studied in the field the load transport behavior of workers of the polymorphic Mediterranean seed harvester ant Messor barbarus . Individual ants used two different methods to transport food items...

..., and which are just side effects of chronic infection. flegr@cesnet.cz 10 4 2012 26 8 2012 © 2013. Published by The Company of Biologists Ltd 2013 behaviour parasite polymorphism Rhesus factor personality questionnaire toxoplasmosis Toxoplasma gondii...

...Heidi K. Grønlien; Bjarne Hagen; Olav Sand SUMMARY Ciliates feed by phagocytosis. Some ciliate species, such as Tetrahymena vorax , are polymorphic, a strategy that provides more flexible food utilization. Cells of the microstomal morph of T. vorax feed on bacteria, organic particles and organic...

... © The Company of Biologists Limited 2008 2008 olfaction antennal lobe electrophysiology neuroanatomy Ostrinia nubilalis polymorphism olfactory receptor neuron projection neuron intracellular recording evolution Moth pheromone communication is a schoolbook example of sexual...

... mosquitofish. (e-mail: lhorth@odu.edu ) 16 10 2006 © The Company of Biologists Limited 2006 2006 color polymorphism temperature melanin melanic melansitic Melanin is one of the most widespread pigments in nature( True et al., 1999 ). It causes the dark coloration found...

... species. In this study, mtDNA variations among four classical (BALB/c, C3H, C57BL/6J and DBA/2) and three Chinese (TA2, 615 and T739) inbred strains of laboratory mice were analyzed by PCR-RFLP (polymerase chain reaction coupled with restriction fragment length polymorphism) and PCR-SSCP (polymerase chain...

... Schistocerca gregaria phase transition HPLC solitarious gregarious polymorphism Fig. 1. Schematic of the nine stages of phase change analysed. Shown descending on the left-hand side, cohorts of long-term crowded (gregarious-phase; stage 1)locusts are taken and isolated for increasing periods...

...-mail: ecyang@dragon.nchu.edu.tw ) 4 5 2004 © The Company of Biologists Limited 2004 2004 colour contrast visual signal Apis mellifera Nephila pilipes polymorphism Various diurnal orb-weaving spiders in the tropics exhibit both bright and dark markings, and recently...

... coast and the English Channel, is statistically significant ( P <0.05). The shapes of the absorbance spectra indicated that the pigments were A1 rhodopsins with no measurable admixture of the A2 chromophore. Thus, the differences indicate polymorphism in the protein part (opsin) of the pigment...

... of X-chromosome inactivation, which ensures that different photopigments are expressed in two subsets of retinal photoreceptor. © 1989 by Company of Biologists 1989 colour vision polymorphism primates In his Uncommon Observations About Vitiated Sight , a collection of case reports...