naa a22 4500 510780385 CHVBK 20180411083245.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11692-013-9224-9 doi (NATIONALLICENCE)springer-10.1007/s11692-013-9224-9 Intraspecific Sexual Size and Shape Dimorphism in an Australian Freshwater Fish Differs with Respect to a Biogeographic Barrier and Latitude [Elektronische Daten] [Clint Kelly, Kaila Folinsbee, Dean Adams, Michael Jennions] Geographically structured variation in morphology is a common phenomenon in animals with environmental factors covarying with both latitude and biogeographic barriers having profound impacts on body size and shape. The Pacific blue-eye (Pseudomugil signifer) is a freshwater fish that lives along Australia's east coast and occurs on either side of a terrestrial barrier, the Burdekin Gap. By quantifying the size and shape of males and females from 10 populations we found that Pacific blue-eyes are not sexually size dimorphism north of the Burdekin Gap whereas the degree of dimorphism was dependent upon latitude south of the barrier. Rensch's rule was not supported as the degree of male-biased size dimorphism did not increase with increasing population mean body size. Body shape was related to body size and was sexually dimorphic south of the Burdekin Gap but not north of it. Our study represents a rare case of identifying how both body size and shape differ with respect to latitude and a major terrestrial biogeographic barrier and lends further support to the notion that P. signifer may comprise two species, or incipient species, that are separated by the Burdekin Gap. Springer Science+Business Media New York, 2013 Body shape nationallicence Body size nationallicence Sexual selection nationallicence Rensch's rule nationallicence Bergmann's rule nationallicence Kelly Clint Research School of Biology, Australian National University, 0200, Canberra, ACT, Australia aut Folinsbee Kaila Department of Anthropology, Iowa State University, 50011, Ames, IA, USA aut Adams Dean Department of Ecology, Evolution and Organismal Biology, Iowa State University, 50011, Ames, IA, USA aut Jennions Michael Research School of Biology, Australian National University, 0200, Canberra, ACT, Australia aut Evolutionary Biology Springer US; http://www.springer-ny.com 40/3(2013-09-01), 408-419 0071-3260 40:3<408 2013 40 11692 https://doi.org/10.1007/s11692-013-9224-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11692-013-9224-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kelly Clint Research School of Biology, Australian National University, 0200, Canberra, ACT, Australia aut NATIONALLICENCE 700 1- Folinsbee Kaila Department of Anthropology, Iowa State University, 50011, Ames, IA, USA aut NATIONALLICENCE 700 1- Adams Dean Department of Ecology, Evolution and Organismal Biology, Iowa State University, 50011, Ames, IA, USA aut NATIONALLICENCE 700 1- Jennions Michael Research School of Biology, Australian National University, 0200, Canberra, ACT, Australia aut NATIONALLICENCE 773 0- Evolutionary Biology Springer US; http://www.springer-ny.com 40/3(2013-09-01), 408-419 0071-3260 40:3<408 2013 40 11692 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer