The location of each zebrafish NITR, DICP, PIGRL, NILT and LITR locus is shown in relation to a published chromosomal map of copy number variation (CNV). 31,749 CNVs found in 80 individual zebrafish were combined into a non-redundant dataset of 6,080 CNV elements (CNVEs) (Brown et al. 2012). Lengths of green (CNV gain) and red (CNV loss) horizontal lines reflect relative CNVE frequencies at respective chromosomal locations. CNV image courtesy of Charles Lee, The Jackson Laboratory Institute for Genomic Medicine.