Section 1 Introduction - National Marine Fisheries Service - NOAA

NBK at Bangor EHW-1 Pile Replacement Project Final Marine Mammal Monitoring Report
Figure 15. Cetacean Behaviors Before, During, and After Pile Driving
Incidences of “hauling out,” and “milling” decreased during the post-construction period in
relation to the pre-construction period. Most behaviors, such as “diving,” “sinking,”
“vocalizing,” “traveling,” “resting,” and “looking,” increased post-construction in relation to
pre-construction. “Entering the water,” “diving,” “traveling,” “swimming,” “slapping,”
“sinking,” “resting,” “looking,” “foraging,” “hauling out,” and “vocalizing” increased during
construction (Table 20, Figure 16).
Table 20. Pinniped Behaviors Before, During,
and After Pile Driving
Behavior
Percentages Among All Categories
[percent (n)]
Before During After
Dive 1.3 (2) 12.3 (19) 2.6 (4)
Enter Water 0 (0) 2.6 (4) 0 (0)
Forage 0 (0) 1.9 (3) 0 (0)
Haul Out 1.3 (2) 1.9 (3) 0 (0)
Look 3.9 (6) 14.8 (23) 4.5 (7)
Mill 2.6 (4) 2.6 (4) 0.6 (1)
Rest 0 (0) 2.6 (4) 1.3 (2)
Sink 1.9 (3) 3.9 (6) 3.9 (6)
Slap 0 (0) 0.6 (1) 0 (0)
Swim 1.9 (3) 15.5 (24) 1.9 (3)
Travel 0 (0) 6.5 (10) 1.3 (2)
Unknown 0 (0) 0 (0) 1.3 (2)
Vocalize 0.6 (1) 2.6 (4) 1.3 (2)
Bangor, Washington 59