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Scr.., .Lu, e. o €

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Frc. 4. Diagram
f a verricrr

c--.:^- -t I I muscte fibres'

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f L. oborifera. Aftows indicate

the position of smooth

\\gggutYii

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SLIDE 22

Melanocefus johnsonii Cryptosarus couesi

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1xl

1o

1x1Os

1 x 1 0 8 1 x 1 0 7

1x106

t xf Osg

Controls Fig.2. Results

f bacterial

luciferase assays. Mean activity of each sample is plotted. Abbreviations (Table 1) identify sample sourses, Multiple sanrples rvere available for some spe. cies. Solid bars, bacterial and symbiotic light organ controls;

pen

bars, myctophid and stomiiform samples grouped ac-

BIOLUNIINESCENCE OF MID\ryATER FISHES Gut

229

Pg

GF, dg

cording to tissue

type. Pp, \Ih, means
f all basterial

con. trols; +, -, V harueyi extract plus or minus photophore ex.

tract. The lowest activity samples

(Sa gut, Lt and Sa photophores) had no detectable activity and are plotted at the level

f

the detection limit. Photophores Gi[ Liver M.G.IIAYG Negative- Control

230

I symbiotic

I Luminous Bactcria I Light Organs v l-] Vf Pp Vh Pl Bs Ak Cc

m r r

a

LI CW Sb AA Sd Photo Liver Gut

Fig. 3. Dot blot of DNA from positive and negative

controls (top rorv) and tissues from myctophid and stomiiform fishes probed rvith a lu.t fragment analogous to pHU870. Ab- breriations

fspecies

identification as in Table 2.

SLIDE 25

PETER '. HERRING

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