Ecology Summary - Thunnus maccoyii

ภาษา:

นิเวศวิทยาของ Thunnus maccoyii

อ้างอิงหลัก	Collette, B.B. and C.E. Nauen, 1983
ข้อสังเกต	In adults, seasonal migrations are observed between the warm water western and northwestern Australian spawning grounds and cold water feeding grounds off Tasmania and New Zealand (at temperatures of 13° to 15°C). The migration pattern of these tuna is revealed by the capture of progressively larger fish along the migration route (Ref. 6390). Juveniles 6-8 cm long have been collected on the North West Shelf of Austrlia and larger juveniles (20-60 cm FL) have been caught on the continental shelf further south (22-34°S) (Ref. 30319). Young fish are generally closely associated with coastal and continental shelf waters, although some immature fish, from 3 years of age, move away from the shelf to feed in the waters of the West Wind Drift (40-45°S) of the Southern Ocean (Ref. 30318). They are caught by longline as far away as South Africa (Ref. 6390). By maturity, most southern bluefin tuna lead an oceanic, pelagic existence (Ref. 6390). Feed on fish and benthic invertebrates (Ref. 168).

อ้างอิงหลัก

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

ข้อสังเกต

In adults, seasonal migrations are observed between the warm water western and northwestern Australian spawning grounds and cold water feeding grounds off Tasmania and New Zealand (at temperatures of 13° to 15°C). The migration pattern of these tuna is revealed by the capture of progressively larger fish along the migration route (Ref. 6390). Juveniles 6-8 cm long have been collected on the North West Shelf of Austrlia and larger juveniles (20-60 cm FL) have been caught on the continental shelf further south (22-34°S) (Ref. 30319). Young fish are generally closely associated with coastal and continental shelf waters, although some immature fish, from 3 years of age, move away from the shelf to feed in the waters of the West Wind Drift (40-45°S) of the Southern Ocean (Ref. 30318). They are caught by longline as far away as South Africa (Ref. 6390). By maturity, most southern bluefin tuna lead an oceanic, pelagic existence (Ref. 6390). Feed on fish and benthic invertebrates (Ref. 168).

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	ปากแม่น้ำ/บึงน้ำกร่อย/ทะเลน้ำกร่อย mangroves marshes/swamps	rivers/streams lakes/ponds ถ้ำ อย่างเดียว,โดยเฉพาะ

Highighted items on the list are where Thunnus maccoyii may be found.

Habitat

Substrate
Substrate Ref.
Special habitats
Special habitats Ref.

Associations

อ้างอิง
Associations
Associated with
Association remarks
Parasitism

การให้อาหาร

วิธีการให้อาหาร	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Collette, B.B. and C.E. Nauen, 1983
นิสัยในการกินอาหาร	hunting macrofauna (predator)
Feeding habit Ref.	Collette, B.B. and C.E. Nauen, 1983

Trophic Level(s)

Estimation method	ตัวอย่างดั้งเดิม		ประชากรที่ยังไม่มีการทำการประมง		ข้อสังเกต
Estimation method	Troph	s.e.	Troph	s.e.	ข้อสังเกต
จากส่วนประกอบของอาหาร
จากรายการอาหารของสัตว์แต่ละชนิด	3.93	0.53			Trophic level estimated from a number of food items using a randomized resampling routine.
อ้างอิง

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