Cited by 41Marine and fisheries researchFish Ecology and Management StudiesFish Biology and Ecology Studies

Phenological and geographical patterns of walleye pollock (Theragra chalcogramma) spawning in the western Gulf of Alaska

Ciannelli, Lorenzo, Bailey, Kevin M, Chan, Kung-Sik, Stenseth, Nils Chr.·2007·Canadian Journal of Fisheries and Aquatic Sciences

Abstract

Over 20 years of egg sampling data were used to reconstruct the geographical and phenological patterns of walleye pollock (Theragra chalcogramma) spawning aggregations in the Gulf of Alaska (GOA). The analyzed time series (1972, 1978–1979, 1981–2000) included a documented event of climate change (i.e., 1988–1989) and the rise and fall of the GOA pollock population abundance and harvests. We compared results from two generalized additive model (GAM) formulations: one assuming no change of egg distribution and phenology over the examined time series (stationary) and the other admitting such changes (nonstationary) across an epoch determined from the data. Results from both model formulations corroborate the existence of a high egg concentration in Shelikof Strait, historically the primary spawning area of pollock in the GOA. However, model results also highlight the presence of other secondary, and possibly transitory, centers of egg distribution at various locations along the shelf and slope regions of the GOA. In addition, results from the nonstationary (and statistically superior) formulation indicate that the abundance of the non-Shelikof aggregations has increased over time, along with a tendency for earlier occurrence and displacement toward shallower areas of the high egg density regions.

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Crossref · 10.1139/f07-049

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  • Walleye pollock in the Shelikof Strait region of the Gulf of Alaska has very limited interannual spawning flexibility, regardless of transport or other environmental conditions within the region.

    “Similarly, walleye pollock in the Shelikof Strait region of the Gulf of Alaska has very limited interannual spawning flexibility, regardless of transport or other environmental conditions within the region (Figure 6, Ciannelli et al., 2007;Bacheler et al., 2009).”

    From Evolutionary and ecological constraints of fish spawning habitats (2015) · cites this paper as Ciannelli et al., 2007

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Authors
Ciannelli, L., Bailey, K. M., Chan, K.-S., & Stenseth, N. C.
Venue
Canadian Journal of Fisheries and Aquatic Sciences
Published
2007-04-01
Volume
64
Issue
4
Pages
713-722
ISSN
  • 0706-652X (ISSN-L)
  • 1205-7533
OpenAlex
W2130586295
Cited by
41
References
34
Citations by year
2024: 2 · 2023: 1 · 2022: 2 · 2021: 1 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 1 · 2015: 3 · 2014: 2 · 2013: 3 · 2012: 6
FWCI
2.78
Type
journal article
Language
en
Open access
closed
Locations
Canadian Journal of Fisheries and Aquatic Sciences (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Fish Biology and Ecology Studies
Keywords
walleye pollock, spawning aggregations, spawning timing, egg distribution, Shelikof Strait, Gulf of Alaska, non-stationary time series, climate change

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