The test panels used to judge color
intensity in the current work were modeled after
panels used to judge taste and texture of tropical
fruits. Panelists were blinded as to treatments and
did not interact with those who recorded results,
as the latter stood physically behind the panel
members. Chemical extraction (Miki et al. 1985;
Matsuno et al. 1985; Katsuyama et al. 1987;
Katsuyama and Matsuno 1988) and fiber optic
reflectance spectrophotometry (Wallat and Lazur
1999) are other methods of quantifying color
intensity. The test panel method, however, offers
the advantages of low cost and convenience but
color photographs (which are expensive to
produce) have an immediate and long-lasting
impact. Photographs of control and experimental
swordtails and rainbowfish may be viewed on the
Internet at http://www.sandersbshrimp.com.