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Background Two Calyptogena clam intracellular obligate symbionts, Ca. Vesicomyosocius okutanii (Vok; C. okutanii symbiont) and Ca. Ruthia magnifica (Rma; C. magnifica symbiont), have small genomes (1.02 and 1.16 Mb, respectively) with low G+C contents (31.6% and 34.0%, respectively) and are thought to be in an ongoing stage of reductive genome evolution (RGE). They lack recA and some genes for DNA...
Chymomyza costata enters larval diapause at short daylengths. Experiments using non-24-h light-dark cycles revealed that the duration of scotophase plays an essential role in the determination of diapause, and night-interruption experiments suggested that the process measuring night length was divided into two phases, A and B. The A phase lasts about 4 h from the onset of scotophase, and a 1 h light...
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