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Fig. 3. Progress of spermatophore melanization in 7* representative
L. vannamei males that were followed throughout 32 weeks, including a
male-only period of 9 weeks (weeks 24-32). The light-gray rectangle that
covers the histogram in the area between weeks 5-15 represents the period of
time in which the females were vitellogenically active. In week 5, one of the
seven males was found slightly melanized and then `white' again on week 6.
Then, three males developed melanization between weeks 7-10 but all of them
recovered and were found `white' between weeks 12-14. All the recoveries
occurred strictly during the period in which the females were vitellogenically
active (weeks 5-15). *Only 6 males remained at week 26 and only 5
at week 29.
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