Oceanographic conditions structure forage fishes into lipid-rich and lipid-poor communities in lower Cook Inlet, Alaska, USA

Abookire, Alisa A.; Piatt, John F.

doi:10.3354/meps287229

Cited by 45 publications

(47 citation statements)

References 33 publications

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“…In lower Cook Inlet, mid-water trawls have documented that three species-Pacific sand lance (Ammodytes hexapterus), Pacific herring (Clupea pallasi), and juvenile walleye pollock (Theragra chalcogramma)-account for nearly 98% of the fish community. Farther north in the inlet, where influx of oceanic water is lower, fish communities show higher species diversity but are less rich in lipids (Abookire and Piatt, 2005). Although there were occasional visits to extreme southerly bays (Fig.…”

Section: Discussionmentioning

confidence: 99%

Movements and Area Use of Belugas, <i>Delphinapterus leucas</i>, in a Subarctic Alaskan Estuary

Hobbs¹,

Laidre²,

Vos³

et al. 2010

ARCTIC

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ABSTRACT. Seasonal movements of 14 belugas in Cook Inlet, Alaska, were monitored by satellite telemetry between July and March in 2000 -03. Whales used waters in the upper Cook Inlet intensively between summer and late autumn and dispersed to mid-inlet offshore waters during winter months. All whales remained in Cook Inlet the entire time they were tracked, and several whales were tracked through March. During summer and early fall, movements were clearly concentrated in specific areas, generally river mouths or bays, where whales were likely feeding on fish runs. Average daily travel distances ranged from 11 to 30 km per day. Monthly home ranges, estimated using the 95% kernel probability distribution of average daily positions, were smallest in August (982 km 2 ), increased throughout autumn, and peaked in winter (reaching approximately 5000 km 2 ). The seasonal variation in distribution and movement patterns displayed by belugas in Cook Inlet affect the sighting rates and seasonal abundance estimates obtained for this depleted population.

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Section: Discussionmentioning

confidence: 99%

Movements and Area Use of Belugas, <i>Delphinapterus leucas</i>, in a Subarctic Alaskan Estuary

Hobbs¹,

Laidre²,

Vos³

et al. 2010

ARCTIC

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“…Sand lance are an important energy-rich forage fish for many piscivorous predators, and changes in their abundance can significantly affect the population dynamics of many species (see review by Wilson et al 1999). Unlike herring, sand lance are thought to be less restricted by water temperatures and able to occupy a wider range of habitats (Abookire & Piatt 2005), which may explain the relatively consistent contribution of sand lance to regional diets.…”

Section: Steller Sea Lion Diet In Kodiak Archipelagomentioning

confidence: 99%

Spatial and temporal variation in the diet of Steller sea lions in the Kodiak Archipelago, 1999 to 2005

McKenzie¹,

Wynne²

2008

Mar. Ecol. Prog. Ser.

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Spatial and temporal variation in the diet of Steller sea lions Eumetopias jubatus was investigated using scat (fecal) samples collected from 4 regions in the Kodiak Archipelago. Over 2700 scats with identifiable prey were collected from the northern, eastern, southern and western sides of Kodiak Island from 1999 to 2005. Of 76 prey types identified using hard remains, the most important species in terms of frequency of occurrence and numerical abundance were Pacific sand lance Ammodytes hexapterus, walleye pollock Theragra chalcogramma, arrowtooth flounder Atheresthes stomias, Pacific cod Gadus macrocephalus, salmon Oncorhynchus spp., and Pacific herring Clupea pallasi. Significant differences in diet composition were found among regions, seasons, and years, suggesting that the diet of sea lions is strongly influenced by local and temporal distributions and abundances of prey. Herring dominated scat collections from the west coast and accounted for most (14 to 30%) of the differences in regional diet in spring and winter. Annual variation in diet was relatively low in winter, whereas spring and fall diets varied from year to year, with regional-specific shifts in dominant prey. Results from our study generally agree with diet studies conducted in the 1990s, but differ markedly in the relative importance of the major prey species.

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“…In the lower inlet, forage fi sh studies have occurred in Kachemak Bay, near Chisik Island in Tuxedni Bay, and northeast of the Barren Islands (e.g., Abookire and Piatt, 2005;Speckman et al, 2005;Fechhelm et al 49 ). Smelts and/or herring were present in all regions but dominant species varied from year to year, region to region, and sometimes season to season.…”

Section: Discussionmentioning

confidence: 99%

Harbor Porpoise, Phocoena phocoena vomerina, in Cook Inlet, Alaska

Shelden¹,

Agler²,

Brueggeman³

et al. 2014

MFR

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Oceanographic conditions structure forage fishes into lipid-rich and lipid-poor communities in lower Cook Inlet, Alaska, USA

Cited by 45 publications

References 33 publications

Movements and Area Use of Belugas, <i>Delphinapterus leucas</i>, in a Subarctic Alaskan Estuary

Movements and Area Use of Belugas, <i>Delphinapterus leucas</i>, in a Subarctic Alaskan Estuary

Spatial and temporal variation in the diet of Steller sea lions in the Kodiak Archipelago, 1999 to 2005

Harbor Porpoise, Phocoena phocoena vomerina, in Cook Inlet, Alaska

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