Kolok, A. S. (1991).  Photoperiod alters the critical swimming speed of juvenile 
largemouth bass, Micropterus salmoides, acclimated to cold water. Copeia.  
4:1085-1090.
	
The objective of this research was to determine whether the critical swimming 
speed of juvenile largemouth bass, Micropterus salmoides, was influenced by 
prolonged exposure to seasonally inconsistent photoperiods. To test this 
hypothesis, the critical swimming speeds (Ucrit) of fish laboratory acclimated 
to 5, 10, 15, or 19 oC, and seasonally consistent or 12:12 light-dark 
photoperiods, were compared to that of field-acclimatized bass. In early winter 
the Ucrit of largemouth bass laboratory acclimated to 5 oC and a 12:12 light-
dark photoperiod was significantly reduced relative to that of fish field 
acclimatized to 5 oC but was not significantly different when compared to that 
of fish acclimated to 5 oC and a seasonally consistent 9:15 light-dark 
photoperiod. In early summer the Ucrit of largemouth bass laboratory acclimated 
to 10 oC and a 12:12 light-dark photoperiod was significantly reduced relative 
to the Ucrit of fish either acclimated to 10 oC and a seasonally consistent 15:9 
light-dark photoperiod or field acclimatized to 10 oC.