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KEYWORDS: Copepods; UVB; Visible light; Life cycle; Feeding - page 6 / 16

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446

able I: Continued

Water layer

Light response

photic þ aphotic

þ

photic 2/2 aphotic 2/2 2/2

þ þ 2 þ þ

2/2 2/2 2/2 2/2 2/2 2/2

2 þ 2 þ 2 þ

2/2 2/2 2/2 2/2 2/2

2 þ 2 2 2

Season

Feeding preferences

Developmental stage

March

Predominantly

CV-CVI

May

herbivore Herbivore 2/2 2/2 2/2 Predominantly

Np CI-CII CIII CIII CIV

August

herbivore 2/2 2/2 2/2 Herbivore 2/2 Predominantly

CIV CV CV CIII CIII CIV

October

herbivore 2/2 2/2 2/2 2/2 2/2

CIV CV CV CIV CV

Significance of light response, P

Significance of starvation acclimation to light response intensification, P

Significance of duration of light acclimation to light response intensification, P

Darkness Light

**

**

No data

No data

** ** ** ** **

No data No data No data No data *

** ** 0.14 0.34 0.87

0.34 0.36 0.12 0.78 0.45

** ** ** ** ** **

0.12 0.45 0.77 ** * **

0.42 0.24 0.54 ** 0.50 **

0.76 0.46 0.44 0.15 0.17 0.17

* ** ** * **

0.57 ** 0.35 0.10 0.73

0.65 ** 0.41 0.32 0.55

0.34 0.33 0.20 0.42 0.09

Species and their biogeographical characteristic

Pseudpcalanus minutus, arctic

**P , 0.01; *P , 0.05. Np, naupliar stages; SI-CV, young and pre-mature copepodites; CVI, mature copepodites. Phototaxis (light response) pattern: þ, positive; 2, negative; 0, indifferent.

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JOURNAL OF PLANKTON RESEARCH

j

VOLUME 32 j

NUMBER 4 j

PAGES 441456 j 2010

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