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Warming slowly enlarges young perch
After 24 years of lake warming, 1- and 3-year-old perch were about 35% larger than in a reference area.
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What was warmed?
Biotest Lake, an enclosed coastal basin receiving heated cooling water.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Study fish?
Eurasian perch (Perca fluviatilis).
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
How long after warming for the 35% result?
24 years.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Size-at-age vs reference?
About 35% larger at ages 1 and 3.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Design?
Progressive-change BACIPS versus a reference area.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Who grew more with warming?
Young, small-bodied perch, not older large fish as strongly.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
How many growth histories?
Close to 13,000 individuals across 35 years.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Pre-warming size difference?
No significant difference before heating.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Did CPUE shift explain sizes?
No shift in perch CPUE relative to the reference area.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Warming start?
Heating began in 1980 after 1977–1979 pre-warming samples.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified
Climate takeaway?
Warming effects on growth can be gradual and size-dependent rather than a one-step plastic jump.
Source: Experimental evidence of gradual size-dependent shifts in body size and growth of fish in response to warming · DOI · quote verified