Limnetic Stickleback

Data Sheet 8

Growth rate of sticklebacks in open water and benthic zone enclosures

(Hatfield and Schluter 1999)


Zone: Fish: Growth rate (mg/day):
Benthic zone Benthic
Hybrid (F1)
Limnetic
28
23
16
Open water Benthic
Hybrid (F1)
Limnetic
13.5
12
17


Design of experiment:  Immature benthic, limnetic, and F1 hybrid sticklebacks were kept in nylon mesh enclosures for 21 days. The enclosures were placed in the benthic zone (where benthic invertebrates were available as food) or in open water (where zooplankton were available as food). After 21 days, the fish were removed from the enclosures and the daily growth rate (mg/day) of each fish was calculated.


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