Decrease in stomach contents in the Antarctic minke whale (Balaenoptera bonaerensis) in the Southern Ocean

Konishi, Kenji; Hakamada, Takashi; Kiwada, Hiroshi; Kitakado, Toshihide; Walløe, Lars

doi:10.1007/s00300-013-1424-3

Cited by 10 publications

(9 citation statements)

References 35 publications

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“…This may suggest this call is not involved in feeding, since most feeding occurs during the night in this area (Konishi et al . ). In the North Atlantic during the migration to feeding grounds, on the other hand, minke whale calls occurred most commonly at night (Risch et al .…”

Section: Discussionmentioning

confidence: 97%

Seasonality of Antarctic minke whale (Balaenoptera bonaerensis) calls off the western Antarctic Peninsula

Dominello

Širović

2016

Marine Mammal Science

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The Antarctic minke whale (Balaenoptera bonaerensis) is a difficult species to study because of its low visual detectability and preference for living within the sea ice habitat, accessible only by ice-strengthened vessels. Recent identification of the Antarctic minke whale as the source of the seasonally ubiquitous bio-duck call has allowed the use of this sound, as well as downsweeps, to investigate seasonality trends and diel patterns in Antarctic minke whale call production, and their relationship to sea ice cover. Passive acoustic data were collected using an autonomous Acoustic Recording Package (ARP) off the western Antarctic Peninsula. Bio-duck calls were classified into four distinct call variants, with one variant having two subtypes. Bio-duck calls were detected between April and November, with increasing call duration during the austral winter, indicating a strong seasonality in call production. Downsweeps, which were also attributed to Antarctic minke whales, were present throughout most months during the recording period, with a peak in July, and an absence in March and April. Both bio-duck and downsweeps were significantly correlated with sea ice cover. No diel patterns were observed in bio-duck calls or in downsweep call production at this site.

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Section: Discussionmentioning

confidence: 97%

Seasonality of Antarctic minke whale (Balaenoptera bonaerensis) calls off the western Antarctic Peninsula

Dominello

Širović

2016

Marine Mammal Science

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“…Castellini 2000) or 'scientific ' (e.g. Folkow et al 2000, Haug et al 2010, Konishi et al 2014, Johnson et al 2016 whaling. It is important to note that dietary contents can significantly differ depending upon the origin of the sample (see Evans et al 2003, Hernandez-Milian et al 2015.…”

Section: Spatial Temporal and Resource Overlap As Indicators Of Marimentioning

confidence: 99%

“…A rising number of studies have already demonstrated the potential losses caused by the changing climate vis-à-vis the availability of fish for fisheries, prey and predator demography and their health status as well as the overall feedback on the ecosystem functioning (e.g. Harvell et al 1999, Tegner & Dayton 2000, Schumacher et al 2005, Kovacs et al 2011, Nye et al 2013, Konishi et al 2014.…”

Section: Conclusion and Future Researchmentioning

confidence: 99%

Competition between marine mammals and fisheries in contemporary harvested marine ecosystems

Saavedra

Kuparinen²

2019

Mar. Ecol. Prog. Ser.

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Competitive interactions between marine mammals and fisheries represents one of the most complex challenges in marine resource management worldwide. The development of commercial fisheries and recovering marine mammal populations have contributed to decreasing of fish availability. Whilst ecosystem-based fisheries management (EBFM) can counteract this decrease, achieving the EBFM objectives faces certain major obstacles including insufficient or unreliable data, inapplicable assessment models as well as inadequate management decisions that do not account for fisheriesinduced morphological alterations (FIMA) and marine mammal management. Despite a body of evidence addressing various aspects of marine mammal-fisheries competition, little is known about the effects of marine mammal-fisheries biological interactions affecting the fish viability and food web stability. Here, we review the research done on marine mammal-fisheries competitive biological interactions (hereafter as 'biological competition') by focussing on: (1) the prerequisites for marine mammal-fisheries biological competition and the relevant methodologies to explore them and (2) recent studies revealing the implications of FIMA and trophic interactions for the biological competition. We also discuss on the implications of FIMA, eco-evolutionary feedback and preypredator dynamics for EBFM implementation in contemporary harvested ecosystems. Our main findings reveal a lack of data about marine mammals' prey choice and selectivity, the need for better representation of marine mammals in modelling approaches and lastly, the necessity for additional research linking FIMA, trophic interactions and the EBFM objectives. To conclude, interdisciplinary approaches may serve to link all of the efforts needed to effectively and holistically support the implementation of EBFM.

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“…The above observations (1996 migrant, 2007 hybrid, 2010 pregnant hybrid, 2010 back-crossed fetus, in addition to several unidentified but possibly backcrossed whales) provide a compelling time-line sequence of events. Documented changes in the Antarctic ecosystem [12] and changes in the energy storage and diet opportunities of Antarctic minke whales [13,14] have led to speculation that Antarctic minke whales may be undertaking contemporary migrations out of its native distribution in search of better feeding opportunities in response to ecological changes [7]. While the microsatellite loci upon which the NMDR are based provide considerable statistical power to identify migrants and F1 hybrids [7], accurate characterization of individuals to various categories of hybrids and back-cross variants becomes increasingly challenging with subsequent generations.…”

Section: Introductionmentioning

confidence: 99%

Whole genome resequencing reveals diagnostic markers for investigating global migration and hybridization between minke whale species

et al. 2017

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BackgroundIn the marine environment, where there are few absolute physical barriers, contemporary contact between previously isolated species can occur across great distances, and in some cases, may be inter-oceanic. An example of this can be seen in the minke whale species complex. Antarctic minke whales are genetically and morphologically distinct from the common minke found in the north Atlantic and Pacific oceans, and the two species are estimated to have been isolated from each other for 5 million years or more. Recent atypical migrations from the southern to the northern hemisphere have been documented and fertile hybrids and back-crossed individuals between both species have also been identified. However, it is not known whether this represents a contemporary event, potentially driven by ecosystem changes in the Antarctic, or a sporadic occurrence happening over an evolutionary time-scale. We successfully used whole genome resequencing to identify a panel of diagnostic SNPs which now enable us address this evolutionary question.ResultsA large number of SNPs displaying fixed or nearly fixed allele frequency differences among the minke whale species were identified from the sequence data. Five panels of putatively diagnostic markers were established on a genotyping platform for validation of allele frequencies; two panels (26 and 24 SNPs) separating the two species of minke whale, and three panels (22, 23, and 24 SNPs) differentiating the three subspecies of common minke whale. The panels were validated against a set of reference samples, demonstrating the ability to accurately identify back-crossed whales up to three generations.ConclusionsThis work has resulted in the development of a panel of novel diagnostic genetic markers to address inter-oceanic and global contact among the genetically isolated minke whale species and sub-species. These markers, including a globally relevant genetic reference data set for this species complex, are now openly available for researchers interested in identifying other potential whale hybrids in the world’s oceans. The approach used here, combining whole genome resequencing and high-throughput genotyping, represents a universal approach to develop similar tools for other species and population complexes.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-3416-5) contains supplementary material, which is available to authorized users.

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Decrease in stomach contents in the Antarctic minke whale (Balaenoptera bonaerensis) in the Southern Ocean

Cited by 10 publications

References 35 publications

Seasonality of Antarctic minke whale (Balaenoptera bonaerensis) calls off the western Antarctic Peninsula

Seasonality of Antarctic minke whale (Balaenoptera bonaerensis) calls off the western Antarctic Peninsula

Competition between marine mammals and fisheries in contemporary harvested marine ecosystems

Whole genome resequencing reveals diagnostic markers for investigating global migration and hybridization between minke whale species

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