• systems
  • Weakly electric fish in the genus Apteronotus provide a unique vertebrate model for studying the evolutionary interplay between signal structure, production, and function in complex communication systems. (biologists.org)
  • Overall, fish show frequent turnover of sex-determining systems [ 5 ], which stands in sharp contrast to other vertebrate clades, especially to birds or mammals, where an entire class shares the same sex chromosomal system with sex being determined at fertilization. (biomedcentral.com)
  • Cichlid fishes with their outstanding adaptive radiations in the East African Great Lakes [ 6 ] offer the ideal evolutionary framework to study the emergence of SD systems. (biomedcentral.com)
  • high
  • Comparison of the grass carp growth hormone gene with those of other fish indicates that there is a high degree of homology with the gene from the common carp but not with those from the rainbow trout and Atlantic salmon. (jcvi.org)
  • Cichlids exemplify the high turnover rate of sex chromosomes in fish with two different chromosomes, LG5 and LG18, containing major sex-determining loci in the two populations of A. burtoni examined here. (biomedcentral.com)