Metabolic rates of minke whales (<i>Balaenoptera acutorostrata</i>) in cold water

Folkow, Lars P.; Blix, A. S.

doi:10.1111/j.1748-1716.1992.tb09402.x

Cited by 125 publications

(77 citation statements)

References 21 publications

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“…Diet studies and diving experiments (Blix and Folkow, 1995;Haug et al, 2002) indicate that minke whales primarily feed in the upper 100 m of the water column. Measurements of dive duration have indicated that minke whales usually stay submerged in dives lasting between 4 and 6 min (Folkow and Blix, 1993). Harp seals use the entire water column but are obviously short-duration divers that normally stay submerged for less than 10 min which would leave very little time at depth if the animal chose to dive as deep as 300 m (Nordøy et al, 2008).…”

Section: Discussion Possible Mechanisms In Predation and Competitionmentioning

confidence: 99%

A review of the battle for food in the Barents Sea: cod vs. marine mammals

et al. 2015

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Cod, harp seal and minke whale are the main top predators in the Barents Sea ecosystem. In the last decade, the abundance of cod has increased considerably, and is at a record high level. In spite of this, the growth and condition of cod has remained rather stable, although some decrease is seen in size at age of large, mature cod. During the same period, the abundance of harp seals has declined whereas the minke whale stock has been at a stable level. The body condition (blubber thickness) of these two mammal stocks has, however, decreased, with the strongest decrease observed for harp seals. A possible hypothesis for explaining this is that cod outperform the marine mammal stocks in the competition for food. The main advantages for cod are most likely larger availability of food (mainly capelin) during winter-spring than for marine mammals, as well as a wider range of prey species being available to cod than to marine mammals. Harp seals are more dependent on prey items found close to the ice edge than the other two predator stocks are, which could partly explain why the performance of harp seals is worse than that of the two other main top predators in the area.

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Section: Discussion Possible Mechanisms In Predation and Competitionmentioning

confidence: 99%

A review of the battle for food in the Barents Sea: cod vs. marine mammals

et al. 2015

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“…Other studies on common minke whales (B. acutrostrata) in the Northern Hemisphere have shown a tendency for a diurnal feeding activity (Haug et al, 1997;Lindstrøm et al, 1998). In the eastern North Atlantic and western North Pacific, they might not feed at night (Folkow and Blix, 1993;Haug et al, 1997;Tamura, MS 1998). The diurnal pattern seems to be similar to that found in North Atlantic fin whales (Vikingsson 1997).…”

Section: The Diurnal Feeding Rhythmmentioning

confidence: 99%

Feeding Habits and Prey Consumption of Antarctic Minke Whale (Balaenoptera bonaerensis) in the Southern Ocean

Tamura¹,

Konishi²

2009

J. Northw. Atl. Fish. Sci.

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The Antarctic minke whale (Balaenoptera bonaerensis) is the most abundant baleen whale species in the Southern Ocean. Quantitative information on prey consumption of whales is useful to understand their feeding ecology and role in the ecosystem. The purposes of this study are 1) to investigate the feeding habit of Antarctic minke whales based on information on prey species, freshness and diurnal change in stomach contents, and 2) to estimate the amount of prey consumed by whales. Estimates are made for whales of different sexual maturity classes as it is expected that the energy requirements vary among them. The analysis is based on the data from whales taken by JARPA (Japanese Whale Research Program under Special Permit in the Antarctic) in a longitudinal sector between 35º E and 145º W, and south of 60º S. Sampling was conducted in the austral summer seasons from 1987/1988 to 2004/2005, mainly in the months from December to March. Daily prey consumption by the whales in each sexual maturity class was estimated using energy-requirement and energy deposition. The whales feed mainly before 05:00 h, which suggest that they cease to feed early in the day. Daily prey consumptions were estimated to be 83.7-325.5 kg, equivalent to 2.7-4.0% of body weight. The mean prey consumptions per capita during feeding season were 7.5 and 16.4 t for immature and mature male, 12.5 and 39.1 t for immature and mature female, respectively. In Area IV (70°-130°E), total prey consumptions of krill by Antarctic minke whales in 1999/2000 and 2001/2002 seasons were estimated to be 0.9 and 1.1 million t, respectively. In Area V (130° E-170° W including the Ross Sea), these estimates in 2000/2001 and 2002/2003 seasons were 3.9 and 4.1 million t, respectively. The estimations of feeding impact on krill resources by Antarctic minke whales in Areas IV and V were from 2.7 to 3.2%, and from 18.2 to 18.9% of krill biomasses, respectively. These results on prey consumption are important input data for the development of ecosystem modeling in the Southern Ocean.

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“…Recent studies in Norway have further developed this work as a part of extensive research into the role of marine mammals in Norwegian waters (e.g. Markussen et al, 1992;Folkow and Blix, 1992;Haug et al, 1996;Nordøy et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Seasonal Abundance of and Estimated Food Consumption by Cetaceans in Icelandic and Adjacent Waters

Sigurjónsson¹,

Víkingsson²

1997

J. Northw. Atl. Fish. Sci.

120

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The consumption of fish, cephalopods and planktonic crustaceans by cetaceans in Icelandic and adjacent waters was estimated. The estimates were based on (i) abundance estimates from recent sighting surveys 89,95); (ii) seasonal variation in abund a n c e e s t i m a t e d f r o m s i g h t i n g s a n d / o r c a t c h d a t a f r o m w h a l i n g v e s s e l s ; a n d (iii) consumption rates calculated from the estimated biomass of cetaceans in the area throughout the year. A large number of assumptions had to be made, and these calculations were mainly intended to give an idea of the possible magnitude of consumption as well as to be a guidance for further research in this field. The total food consumption was estimated as 6.3 million tons in a smaller area defined as Icelandic and adjacent waters, and 8.8 million tons in the larger area north of 60 o N. Considering total consumption, fin whales (Balaenoptera physalus) and minke whales (B. acutorostrata) were the largest consumers in the area, followed by long-finned pilot whales (Globicephala melas) and northern bottlenose whales (Hyperoodon ampullatus). Crustaceans comprise around 50% of the total consumption within the study area while finfish and cephalopods comprised 27% and 22%, respectively, in the large area. Minke whales were the largest consumers of finfish, consuming more than 1 million tons of fish in Icelandic and adjacent waters.

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Metabolic rates of minke whales (Balaenoptera acutorostrata) in cold water

Cited by 125 publications

References 21 publications

A review of the battle for food in the Barents Sea: cod vs. marine mammals

A review of the battle for food in the Barents Sea: cod vs. marine mammals

Feeding Habits and Prey Consumption of Antarctic Minke Whale (Balaenoptera bonaerensis) in the Southern Ocean

Seasonal Abundance of and Estimated Food Consumption by Cetaceans in Icelandic and Adjacent Waters

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