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Table 6 Mean temperatures (degrees Celsius) experienced by Pacific halibut (Hippoglossus stenolepis) tagged with pop-up archival transmitting tags during 2008 and 2009 in the Aleutian Islands, Eastern Bering Sea (EBS), and a Transition Zone between those ecosystems and the western Gulf of Alaska, that undertook seasonal offshore migrations during the autumn of the year in which they were tagged

From: Dispersal and seasonal movements of Pacific halibut (Hippoglossus stenolepis) in the eastern Bering Sea and Aleutian Islands, as inferred from satellite-transmitting archival tags

Tagging region

Midsummer

D-4

D-3

D-2

D-1

Western Aleutian

4.8 ± 0.6a

4.5 ± 0.5

4.5 ± 0.5

4.5 ± 0.5

4.5 ± 0.5

Central Aleutian

5.3 ± 0.4a

5.5 ± 0.8

5.2 ± 0.7

5.2 ± 0.7

5.0 ± 0.6

Transition Zone

5.2 ± 0.6b

5.4 ± 0.5

5.2 ± 0.7

5.1 ± 0.6

5.0 ± 0.6

EBS Shelf Edge

2.9 ± 0.4b

3.0 ± 0.6

3.0 ± 0.6

3.0 ± 0.6

3.0 ± 0.6

EBS Shelf Islands

3.3 ± 0.9b

2.6 ± 1.3

2.6 ± 1.3

2.7 ± 1.2

2.8 ± 1.1

  1. “Midsummer” was defined as 28 July through 7 September, when fish were resident on shallow grounds. “D-1” represents mean temperature during the week prior to the fishes’ departure to deep water; D-2 is the week prior to D-1, and so forth. The superscripts after the midsummer means indicate two groups determined to be significantly different (p < 0.05) from one another. In no region were mean temperatures experienced during the 4 weeks prior to departure found to be significantly different from the region’s midsummer temperature