Ecology Summary - Balaenoptera bonaerensis

Ecology Summary - Balaenoptera bonaerensis

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Ecology of Balaenoptera bonaerensis

Main Ref.	Rice, D.W., 1998
Remarks	Feeds mainly on krill offshore; and other prey items such as amphipods and fish. Their prey species varies geographically. Reports suggests a bimodal diurnal feeding rhythm with a primary peak in the early morning and a secondary one in the late evening. It takes 8 hours to digest their stomach contents (Ref. 79551).

Aquatic zones / Water bodies

	Marine - Neritic	Marine - Oceanic	Brackishwater	Freshwater
Marine zones / Brackish and freshwater bodies	supra-littoral zone littoral zone sublittoral zone	epipelagic mesopelagic epipelagic abyssopelagic hadopelagic	estuaries/lagoons/brackish seas mangroves marshes/swamps	rivers/streams lakes/ponds caves exclusively in caves

Highighted items on the list are where Balaenoptera bonaerensis may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.	Rice, D.W., 1998
Associations
Associated with
Association remarks
Parasitism

feeding

Feeding type	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Tamura, T. and K. Konishi, 2005
Feeding habit	hunting macrofauna (predator)
Feeding habit Ref.	Tamura, T. and K. Konishi, 2005

Trophic Level(s)

Estimation method	original sample		unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition	3.20	0.40			Troph of juv./adults.
From individual food items	3.89	0.65			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.	Tamura, T. and K. Konishi, 2005

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