Ecology Summary - Auxis thazard

Língua:

Ref. principal	Collette, B.B. and C.E. Nauen, 1983
Notas	Epipelagic in neritic and oceanic waters (Ref. 9340). Feeds on small fish, squids, planktonic crustaceans (megalops), and stomatopod larvae (Ref. 5213). Because of their abundance, they are considered an important element of the food web, particularly as forage for other species of commercial interest. Preyed upon by larger fishes, including other tunas (Ref. 9987). Confined to oceanic salinities with strong schooling behavior. Though larvae have a high temperature tolerance (at least between 21.6 and 30.5°C), the widest among tuna species studied, their optimum temperature is between 27 and 27.9°C.

Ref. principal

Collette, B.B. and C.E. Nauen, 1983

Notas

Epipelagic in neritic and oceanic waters (Ref. 9340). Feeds on small fish, squids, planktonic crustaceans (megalops), and stomatopod larvae (Ref. 5213). Because of their abundance, they are considered an important element of the food web, particularly as forage for other species of commercial interest. Preyed upon by larger fishes, including other tunas (Ref. 9987). Confined to oceanic salinities with strong schooling behavior. Though larvae have a high temperature tolerance (at least between 21.6 and 30.5°C), the widest among tuna species studied, their optimum temperature is between 27 and 27.9°C.

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	Estuários/lagunas/áreas estuarinas mangroves marshes/swamps	rivers/streams lakes/ponds Grutas exclusivamente

Highighted items on the list are where Auxis thazard may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

Ref.
Associations
Associated with
Association remarks
Parasitism

Alimentação

Tipo de alimentação	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Uchida, R.N., 1981
Hábito alimentar	hunting macrofauna (predator)
Feeding habit Ref.	Collette, B.B. and C.E. Nauen, 1983

Trophic Level(s)

Estimation method	Amostra original		População virgem (não pescada)		Nota
Estimation method	Troph	s.e.	Troph	s.e.	Nota
Da composição da dieta	4.37	0.38	4.19	0.60	Troph of juv./adults from 2 studies.
Dos itens alimentares individuais	4.36	0.73			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.	Blaber, S.J.M., D.A. Milton, N.J.F. Rawlinson, G. Tiroba and P.V. Nichols, 1990

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