How transport shapes copepod distributions in relation to whale feeding habitat: Demonstration of a new modelling framework

Brennan, Catherine E.; Maps, Frédéric; Gentleman, Wendy C.; Plourde, Stéphane; Lavoie, Diane; Chassé, Joël; Lehoux, Caroline; Krumhansl, Kira A.; Johnson, Catherine L.

doi:10.1016/j.pocean.2018.12.005

Cited by 26 publications

(15 citation statements)

References 50 publications

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“…Shifts in C. finmarchicus abundance can also lead to timing mismatches for migratory species and reduced availability of anticipated food (Record et al, 2019b;Staudinger et al, 2019). In recent years, this has been observed among the North Atlantic right whale (Eubalaena glacialis) whose diet consists primarily of copepods (Brennan et al, 2019) and is correlated with fish and lobster recruitment (Perretti et al, 2017;Carloni et al, 2018).…”

Section: Plankton Monitoring Datamentioning

confidence: 99%

“…To incorporate biological interactions and prey availability into the assessment of stock status, C. finmarchicus abundance data were compiled from the DFO Atlantic Zone Monitoring Program (AZMP), and the spatial abundance was simulated by a coupled bio-physical model (Brennan et al, 2019). The AZMP characterizes oceanographic variability through measurements of temperature, salinity, nutrients, chlorophyll, and zooplankton.…”

Section: Plankton Monitoring Datamentioning

confidence: 99%

“…LFAs that did not contain survey stations were assigned values from the nearest neighboring LFA. Data were divided into two time periods corresponding to the shift circa 2010 in right whale migration patterns (Brennan et al, 2019). As Calanus spp.…”

Section: Stock Statusmentioning

confidence: 99%

“…are the main prey of right whales, this likely represents an upper trophic level response to the documented changes circa 2010 in the zooplankton community in the northwest Atlantic shelf (Devine et al, 2017;Johnson et al, 2018;Meyer-Gutbrod et al, 2018). Mean abundance per LFA was calculated from a coupled bio-physical model prediction of the spatial distribution of average May-November 2008 C. finmarchicus late stage abundance (copepodite stages CV and CVI) on the eastern Canadian shelf (Brennan et al, 2019).…”

Section: Stock Statusmentioning

confidence: 99%

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Climate Change Vulnerability of American Lobster Fishing Communities in Atlantic Canada

et al. 2019

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Climate change impacts on fisheries will undoubtedly have socioeconomic impacts on coastal communities and the seafood market. However, it is a challenge to integrate climate change information in a form that can be used efficiently by adaptation planners, policy makers, and fishery managers. In this study, we frame a climate change impact assessment using a geographical perspective based on the management units of the dominant fishery, in this case, American lobster in Nova Scotia, Canada. The information considered here includes economic dependence on the fishery, population size, diversity of the fishery revenue, status of harbor infrastructure, total replacement cost of each harbor, increased relative sea level and flooding, and the vulnerability of offshore lobster to ocean warming and changes in zooplankton composition and anticipatory changes in fishery productivity across management borders. Using two ocean models to provide multi-decadal scale projections of bottom temperature, changes in offshore lobster distribution are projected to have a neutral, or positive impact on the region as a whole. However, when lobster vulnerability is combined with climate change related vulnerabilities of coastal fishing communities, it is evident that adaptation planning is needed for long-term sustainability. This impact assessment provides both a framework and information for further in-depth analyses by climate change adaptation planners and fishery managers.

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Section: Plankton Monitoring Datamentioning

confidence: 99%

Section: Plankton Monitoring Datamentioning

confidence: 99%

Section: Stock Statusmentioning

confidence: 99%

Section: Stock Statusmentioning

confidence: 99%

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Climate Change Vulnerability of American Lobster Fishing Communities in Atlantic Canada

et al. 2019

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“…Laidre et al (2010) found extremely low correlation between local satellite-derived chlorophyll estimates and the location and timing of bowhead whale foraging in Disko Bay, and in light of the results above, this is not surprising: not merely because detecting correlations in a patchy, undersampled ocean is difficult, but because it seems likely that Disko Bay itself is only one of several regional seas in which one needs to look for the phytoplankton that feed Disko Bay's copepods and whales. If so, then Disko Bay joins a provocatively long list of case studies in which high-latitude bowhead and right whales have been found to forage on mesozooplankton prey advected from elsewhere (Rogachev et al, 2008;Ashjian et al, 2010;Walkusz et al, 2012;Boertmann et al, 2015;Brennan et al, 2018).…”

Section: Implications For Calanus Populationsmentioning

confidence: 99%

Reconciling Behavioural, Bioenergetic, and Oceanographic Views of Bowhead Whale Predation on Overwintering Copepods at an Arctic Hotspot (Disko Bay, Greenland)

et al. 2021

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Bowhead whales (Balaena mysticetus) visit Disko Bay, West Greenland in winter and early spring to feed on Calanus spp., at a time of year when the copepods are still mostly in diapause and concentrated in near-bottom patches. Combining past observations of copepod abundance and distribution with detailed observations of bowhead whale foraging behaviour from telemetry suggests that if the whales target the highest-density patches, they likely consume 26–75% of the Calanus standing stock annually. A parallel bioenergetic calculation further suggests that the whales' patch selection must be close to optimally efficient at finding hotspots of high density copepods near the sea floor in order for foraging in Disko Bay to be a net energetic gain. Annual Calanus consumption by bowhead whales is similar to median estimates of consumption by each of three zooplankton taxa (jellies, chaetognaths, and predatory copepods), and much greater than the median estimate of consumption by fish larvae, as derived from seasonal abundance and specific ingestion rates from the literature. The copepods' self-concentration during diapause, far from providing a refuge from predation, is the behaviour that makes this strong trophic link possible. Because the grazing impact of the whales comes 6–10 months later than the annual peak in primary production, and because Disko Bay sits at the end of rapid advective pathways (here delineated by a simple numerical particle-tracking experiment), it is likely that these Calanus populations act in part as a long-distance energetic bridge between the whales and primary production hundreds or thousands of km away.

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Evaluating the effect of input variables on quantifying the spatial distribution of croaker Johnius belangerii in Haizhou Bay, China

Zhang

Xue

et al. 2021

J. Ocean. Limnol.

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How transport shapes copepod distributions in relation to whale feeding habitat: Demonstration of a new modelling framework

Cited by 26 publications

References 50 publications

Climate Change Vulnerability of American Lobster Fishing Communities in Atlantic Canada

Climate Change Vulnerability of American Lobster Fishing Communities in Atlantic Canada

Reconciling Behavioural, Bioenergetic, and Oceanographic Views of Bowhead Whale Predation on Overwintering Copepods at an Arctic Hotspot (Disko Bay, Greenland)

Evaluating the effect of input variables on quantifying the spatial distribution of croaker Johnius belangerii in Haizhou Bay, China

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