TABLE 2.

Symbiont species present at each collection site^a

Location	Symbiont species (no. of isolates)b	% of total symbiont population
Banyuls-sur-Mer, France	V. fischeri (74)	78
	V. logei (16)	16
	P. leiognathi (12)	6
Bari, Italy	V. fischeri (58)	85
	V. logei (10)	15
Bay of Biscay, Atlantic	P. leiognathi (8)	100*

^aSpecies identification is based on the 16S rRNA sequence for all symbiotic bacteria isolated from squid light organs. Percentages are based on the total population within one particular site. *, all symbionts isolated from the R. minor host were Photobacterium leiognathi. No Vibrio species were isolated from these hosts.

^bn = 178.