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Fig. 3 | Animal Biotelemetry

Fig. 3

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

Fig. 3

Light-based longitude estimates (upper panels) and daily maximum depth profiles (lower panels) during periods at liberty (2008 and 2009) of: a one Pacific halibut tagged in the Western Aleutian Islands, from date of tagging (top of upper panels) to date of final tag reporting (bottom of upper panels), and; b, c two Pacific halibut (Hippoglossus stenolepis) tagged with pop-up archival transmitting tags in the far-western Gulf of Alaska. All data were obtained via satellite transmission (i.e., the tags were not recovered). The approximate longitudinal span of International Pacific Halibut Commission regulatory areas is indicated by shading; note that the Western Aleutians are located in the eastern hemisphere, with the Antimeridian bisecting IPHC Regulatory Area 4B at approximately Amchitka Pass. The fish depicted in a remained in shallow water throughout the year and the light data provide no evidence that it departed its tagging location. However, note the single outlier position in early June of 2009: this likely represents a biased daylight curve, as the position is farther eastward than a Pacific halibut could likely swim during the time elapsed relative to the remainder of the position estimates. The fish depicted in b and c emigrated from their tagging region and had final tag-reporting locations in the Gulf of Alaska and coastal Washington State, respectively; the timing of their migrations was coincident with their movement to deep water in autumn

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