| identification of hemiclonal reproduction in three species of hexagrammos marine reef fishes. | natural hybrids between the boreal species hexagrammos octogrammus and two temperate species hexagrammos agrammus and hexagrammos otakii were observed frequently in southern hokkaido, japan. previous studies revealed that h. octogrammus is a maternal ancestor of both hybrids; the hybrids are all fertile females and they frequently breed with paternal species. although such rampant hybridization occurs, species boundaries have been maintained in the hybrid zone. possible explanations for the abse ... | 2014 | 24903212 |