caa a22 4500 467889821 CHVBK 20180406152745.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s00049-005-0333-5 doi (NATIONALLICENCE)springer-10.1007/s00049-005-0333-5 Can the ratio of aromatic skeletons explain cross-species responses within evolutionarily conserved Ostariophysan alarm cues?: testing the purine-ratio hypothesis [Elektronische Daten] [Jocelyn Kelly, James Adrian Jr., Grant Brown] Summary.: While the response to damage-released chemical alarm cues within the superorder Ostariophysi appears to be highly conserved across species, it is generally observed that the intensity of response to heterospecific alarm cues decreases with increasing phylogenetic distance. Recent studies have demonstrated that purine-N-oxides function as chemical alarm cues within Ostariophyian fishes and that the nitrogen-oxide functional group is conserved as the chief molecular trigger. According to the purine-ratio hypothesis, these cross-species differences may be due to the relative proportion of different carrier compounds associated with the nitrogen-oxide molecular trigger. To test this hypothesis, we exposed glowlight tetras (Hemigrammus erythrozonus, Characidae, Ostariophysi) to one of five synthetic stimuli (hypoxanthine-3-N-oxide (H3NO), pyridine-N-oxide (PNO) or mixed stimuli of 75 % H3NO-25 % PNO, 50 % H3NO-50 % PNO, or 25 % H3NO-75 % PNO), natural conspecific chemical alarm cue or a distilled water control. We quantified changes in shoal cohesion and vertical area use as species typical indicators of an antipredator response. As predicted, response intensity decreased as the ratio of hypoxanthine-3-N-oxide to pyridine-N-oxide decreased and the strongest response was to natural alarm cue. These results suggest that species-specific carrier compounds may account for the well-documented cross-species differences in the response to heterospecific alarm cues within phylogenetically related taxa. Birkhäuser Verlag, Basel, 2006 Ostariophysan fishes nationallicence chemical alarm cue nationallicence predation nationallicence prey guilds nationallicence Hemigrammus erythrozonus nationallicence cross-species responses nationallicence Kelly Jocelyn Department of Biology, Concordia University, 7141 Sherbrooke St. O., H4B 1R6, Montréal, Quebéc, CANADA aut Adrian Jr. James Department of Chemistry Science and Engineering Center, Union College Schenectady, 12308, New York, USA aut Brown Grant Department of Biology, Concordia University, 7141 Sherbrooke St. O., H4B 1R6, Montréal, Quebéc, CANADA aut CHEMOECOLOGY Birkhäuser-Verlag; www.birkhauser.ch 16/2(2006-06-01), 93-96 0937-7409 16:2<93 2006 16 49 https://doi.org/10.1007/s00049-005-0333-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00049-005-0333-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kelly Jocelyn Department of Biology, Concordia University, 7141 Sherbrooke St. O., H4B 1R6, Montréal, Quebéc, CANADA aut NATIONALLICENCE 700 1- Adrian Jr James Department of Chemistry Science and Engineering Center, Union College Schenectady, 12308, New York, USA aut NATIONALLICENCE 700 1- Brown Grant Department of Biology, Concordia University, 7141 Sherbrooke St. O., H4B 1R6, Montréal, Quebéc, CANADA aut NATIONALLICENCE 773 0- CHEMOECOLOGY Birkhäuser-Verlag; www.birkhauser.ch 16/2(2006-06-01), 93-96 0937-7409 16:2<93 2006 16 49 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer