
TY  - JOUR
A1  - Bertozzi, Terry 
A1  - Adams, Mark 
A1  - Walker, Keith F. 
T1  - Species boundaries in carp gudgeons (Eleotrididae : <emph type="2">Hypseleotris</emph>) from the River Murray, South Australia: evidence for multiple species and extensive hybridization
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 2000
VL  - 51
IS  - 8
SP  - 805
EP  - 815
KW  - freshwater fishes, molecular systematics, morphology
UR  - https://doi.org/10.1071/MF00039 
N2  - Allozyme analyses of carp gudgeons (Hypseleotris) from five sites in the lower River Murray revealed three distinctive taxa designated HA, HB and HC, diagnosable from one another by fixed differences at 3&#8211;5 loci, and three apparent F 1 hybrid forms, HA&yen;HB, HA&yen;HX and HB&yen;HX, where HX denotes a taxon not sampled in its &#8216;pure&#8217; form. Of all fish sampled, 25% were hybrids, although only one hybrid form was found at any one site, and never in company with both parental taxa. No hybrids involving HC were found, although this was the most common taxon, and no HA&yen;HB hybrids were present at the one site of demonstrated sympatry between the parental taxa. Morphological analysis and the lack of introgression confirm that HA, HB, and HC are distinct biological species. Partial meristic data suggest that HC corresponds to H. klunzingeri s.l., &#8216;Midgley&#8217;s carp gudgeon&#8217; is a composite of HA, HB and HA&yen;HB hybrids, and &#8216;Lake&#8217;s carp gudgeon&#8217; may be a composite of HX and one of its hybrids (HB&yen;HX). We speculate that one or more of the hybrid classes may be &#8216;unisexual lineages&#8217; (clonally reproducing, usually all-female forms derived from hybridization between congeners). 
ER  -

