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<br />proteins do not seem to be a source of discrimin?tory variation. <br /> <br />Storage conditions may have had a adverse affect; keeping samples <br /> <br />in 2 kitchen freezer at -20 oc may have accplerated the inacti- <br /> <br />vation of diagnostic proteins (Brewer, 1970). <br /> <br />The Blackrocks <br /> <br />"humpback" and "roundtail" fin clips were continually kept under <br /> <br />ultracold conditions, dry ice in the field with immediate <br /> <br />transfer to a -80 Oc freezer upon arrival at the laboratory. The <br /> <br />identity of results between DWR fin clips and those f~om Black- <br /> <br />rocks could mean that (2) proteins were not denatured during <br /> <br />prolonged storage at -20 Oc and (b) no differences within and <br /> <br />between species are truly expressed with respect to the assayed <br /> <br />~roteins. <br /> <br />assay: <br /> <br />This study does not preclude a future non-lethal <br /> <br />1. Other proteins available in fin extracts may reveal <br /> <br />diagnostic protein electromorphs. <br /> <br />2. Other tissues may provide the electromorphs necessary <br /> <br />for discrimination. <br /> <br />Serum proteins could yield diagnostic <br /> <br />variation and the required blood samples can be taken with <br /> <br />minimum trauma from adult chubs. <br /> <br />These compounds (e.g., <br /> <br />tranferrin) may be, on average, the first to diverge between <br /> <br />reproductively-isolated populations (Johnson, 1974). If <br /> <br />muscle proteins were to provide diagnostic proteins, samples <br /> <br />might be acquired non-lethally with biopsy devices currently <br /> <br />used in hum~n ~edicine. <br /> <br />Unfortunately, liver proteins are <br /> <br />6 <br />