Geographic patterns in the demersal ichthyofauna of the Aleutian Islands

Logerwell, Elizabeth; Aydin, Kerim; Barbeaux, Steven J.; Brown, E. S.; Conners, M. Elizabeth; Löwe, Sandra; Orr, James W.; Ortiz, Ivonne; Reuter, Rebecca F.; Spencer, Paul D.

doi:10.1111/j.1365-2419.2005.00366.x

Cited by 65 publications

(90 citation statements)

References 37 publications

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“…These effects compared favorably with similar findings of other researchers by confirming the depth distributions and temperature affiliations of Pacific ocean perch life stages (Carlson and Haight, 1976;Brodeur, 2001;Love et al, 2002;Rooper and Boldt, 2005;Rooper 2008). The GAMs predicted increases of occurrence and abundance of Pacific ocean perch in proximity to most major Aleutian passes (e.g., Amukta, Seguam, and Buldir) that were similar to findings by Logerwell et al (2005). We also determined that the inclusion of predictors that act over more local scales (e.g., biogenic structures and slope of the bottom at a sampling station) can improve the GAM fit and enhance our understanding of Pacific ocean perch distribution and abundance patterns within the context of broader scale oceanographic processes.…”

Section: Discussionsupporting

confidence: 62%

“…Logerwell et al (2005) examined geographic patterns of demersal ichthyofauna in the Aleutian Islands and found that smaller Pacific ocean perch (≤25 cm, Reuter 2 ) inhabited shallower water (<150 m) than that inhabited by larger individuals, and they further suggested that large catches (>100 kg/ha) could be affiliated with zones of increased productivity and prey availability. Other researchers have confirmed that juvenile and adult Pacific ocean perch occur over similar temperature ranges but present different depth distributions (i.e., adults inhabit >200 m waters) (Carlson and Haight, 1976;Rooper, 2008).…”

mentioning

confidence: 99%

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Correlating environmental and biogenic factors with abundance and distribution of Pacific ocean perch (Sebastes alutus) in the Aleutian Islands, Alaska

Laman¹,

Kotwicki²,

Rooper³

2015

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Abstract-In the Aleutian Islands, patterns of distribution and abundance of Pacific ocean perch (Sebastes alutus) are influenced by oceanographic processes and biogenic structures. We used generalized additive modeling (GAM) to examine relationships between these predictors and patterns of settled juvenile and adult distribution and abundance from bottom trawl surveys conducted from 1997 through 2010. Depth, temperature, and location had the greatest influence, and biogenic structures co-occurring with this species improved predictions. Model results confirmed previously reported depth-and temperaturedependent patterns of Pacific ocean perch and revealed the elevated presence and abundance of this fish in proximity to Aleutian passes. Adults were more common and abundant in deeper (~225 m) water than were juveniles (~150 m), and the probability of encountering either life stage increased in the presence of fan-and ball-shaped sponges over moderate slopes and decreased with increasing tidal velocities. The GAMs accounted for one-quarter of the deviance for juvenile presenceabsence (24.9%) and conditional abundance (25.0%) and accounted for 38.7% and 42.5% of the deviance for the same adult response variables. Although depth, temperature, and location were the dominant predictor variables of both juvenile presence and abundance, our results indicate that biogenic structures that provide vertical structure in otherwise lowrelief, trawlable habitats may represent refugia for Pacific ocean perch juveniles and adults.Describing essential fish habitat (EFH), defined by the Magnuson-Stevens Fishery Conservation and Management Act (Magnuson-Stevens Act) as "those waters and substrate necessary to fish for spawning, breeding, feeding or growth to maturity," has been the focus of much recent habitat research. Laidig et al. (2009) used the Delta submersible to conduct visual surveys on the central California shelf and found that demersal fishes associated with boulder and cobble substrata occurred in greater numbers than they did with mud or brachiopod beds. Other studies have observed denser and more diverse assemblages of rockfishes in the presence of increased boulder coverage (Marliave and Challenger, 2009) or in association with rocky ridges (Rooper et al., 2010). Greene et al. (2011) demonstrated that rugged seafloor geomorphologies in southeast Alaska can be used to identify suitable habitat for demersal shelf rockfish (Sebastes spp.). Living substrata can also modify seafloor habitats in ways that impact EFH. Others have considered biogenic structures, such as sponges, corals, and bryozoans, to be important habitat-forming organisms in Alaska Malecha et al., 2005; Stone et al., 2011) and other waters (e.g., Barthel, 1997 [Weddell Sea]; Beazley et al., 2013 [the northwest Atlantic]; and Coker et al., 2014 [warm-water coral reefs]). In this study, we attempt to add to the growing body of knowledge used to identify and describe EFH for species of Sebastes in Alaska.The Resource Assessment and Conservation Engin...

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Section: Discussionsupporting

confidence: 62%

mentioning

confidence: 99%

Correlating environmental and biogenic factors with abundance and distribution of Pacific ocean perch (Sebastes alutus) in the Aleutian Islands, Alaska

Laman¹,

Kotwicki²,

Rooper³

2015

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“…These areas may also attract species in upper trophic levels, such as Pacific cod, Steller sea lions and northern fur seals that prey on Atka mackerel (Kajimura, 1984;Sinclair and Zeppelin, 2002). The patchy distribution of Atka mackerel may also reflect the distributions of other species that have similar feeding habits like northern rockfish and Pacific ocean perch (Logerwell et al, 2005). The localized nature of highly productive areas might help to explain why Atka mackerel do not make substantial movements (more than 50 km) outside of the Seguam Pass area and may home to specific locations.…”

Section: Population Estimates and Movement Rates By Sexmentioning

confidence: 99%

“…Once we understand the environmental and biological factors of preferred Atka mackerel microhabitats in one portion of their range (e.g., Seguam Pass), we may then understand what controls Atka mackerel distributions in other parts of the Aleutian Islands that have different bathymetric and oceanographic features. These comparisons may be very useful in understanding the differences in growth, abundance and small-scale distributions between Atka mackerel populations in the western and eastern Aleutian passes (Logerwell et al, 2005), which in turn will aid in describing areas of varying productivity within the Aleutian ecosystem. Zar, J.H.…”

Section: Population Estimates and Movement Rates By Sexmentioning

confidence: 99%

Estimating movement and abundance of Atka mackerel (Pleurogrammus monopterygius) with tag–release–recapture data

McDermott

Fritz

Haist

2005

Fisheries Oceanography

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A mark-recapture experiment was conducted in Seguam Pass, Alaska, to estimate local Atka mackerel (Pleurogrammus monopterygius) abundance and to evaluate the efficacy of trawl exclusion zones around Steller sea lion (Eumetopias jubatus) rookeries. Atka mackerel were found in dense aggregations near the Aleutian Islands where they are a major prey item of endangered Steller sea lions. In 1999, 1375 tagged fish were released and a biomass of 76 679 metric tonnes (t) was estimated outside a trawl exclusion zone using a simple Petersen model. In 2000, 8773 tagged fish were released and the estimated biomasses were 117 900 t inside and 82 057 t outside the trawl exclusion zones using an integrated tagging model. Movement into the open zone was small after 107 days (0.6%), whereas movement from the open area was potentially large but highly uncertain after 107 days (81%). Our model suggests that trawl exclusion zones in Seguam Pass are effective in separating a large biomass of potential prey for Steller sea lions from the immediate effects of local fisheries. Atka mackerel do not appear to move substantially outside their local aggregations (<70 km), and they show strong habitat preferences within their local home ranges. In one instance, fish released in an area of low Atka mackerel abundance returned to their capture location about 2 miles away. Thus individual Atka mackerel may have an affinity for particular areas within their home range, perhaps resulting from adaptations to local oceanic conditions along the Aleutian Island archipelago.

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“…Populations of Atka mackerel, if present, were probably driven to extinction in the central North Pacific by coastal glaciers or were displaced into southern refugia during periods of cooling (Barrie and Conway 1999;Marko 2004). The most likely postglacial colonization route involved a northeastward expansion of Atka mackerel to the Aleutian Islands archipelago, the contemporary center of its distribution (Logerwell et al 2005;Lauth et al 2007ba), from the boreal western Pacific Ocean after glacial retreat in the Holocene. The islands and associated submerged Aleutian platform formed the western tip of the Cordilleran ice sheet during the last glacial maximum (LGM) in the Pleistocene (;18,000 years before present), although its exact westernmost terminus is unknown (Thorson and Hamilton 1986).…”

Section: Demography Natural Selection and Contrasting Nuclear And Mmentioning

confidence: 99%

Highly Discordant Nuclear and Mitochondrial DNA Diversities in Atka Mackerel

et al. 2010

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Abstract.-Levels of neutral genetic diversity largely reflect effective population size (N e ), which is influenced by physical and biological environmental variables. While large populations of marine fishes generally harbor higher diversities than freshwater species, historical demography or the effects of natural selection may significantly reduce N e and differentially affect genomic diversities. Here, we surveyed levels of genetic diversity and examined genetic structure among populations of the Atka mackerel Pleurogrammus monopterygius across most of its geographic range by screening variation at nine nuclear microsatellite DNA markers (n ¼ 745) and in a 468-base-pair segment of the mitochondrial DNA (mtDNA) control region (n ¼ 119). Samples from Japan to the western Gulf of Alaska were collected between 2004 and 2006 at six locations, including temporal replicates at two sites. Microsatellite allele frequency homogeneity across the North Pacific indicated an apparent lack of genetic population substructure. While levels of polymorphism at microsatellite loci were typical for marine fishes (haplotype diversity h ¼ 0.34-0.96), mtDNA control region diversity was extremely low (nucleotide diversity ¼ 0.00007; h ¼ 0.033). Only three mtDNA haplotypes, two occurring as singletons, were detected among 119 individuals. The strong contrast between microsatellite and mtDNA diversities appears to be due to the smaller N e for mtDNA, perhaps resulting from population bottlenecks during postglacial colonizations of the central North Pacific or the effects of natural selection on mtDNA.

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Geographic patterns in the demersal ichthyofauna of the Aleutian Islands

Cited by 65 publications

References 37 publications

Correlating environmental and biogenic factors with abundance and distribution of Pacific ocean perch (Sebastes alutus) in the Aleutian Islands, Alaska

Correlating environmental and biogenic factors with abundance and distribution of Pacific ocean perch (Sebastes alutus) in the Aleutian Islands, Alaska

Estimating movement and abundance of Atka mackerel (Pleurogrammus monopterygius) with tag–release–recapture data

Highly Discordant Nuclear and Mitochondrial DNA Diversities in Atka Mackerel

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