Ecology Summary - Stenella longirostris

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Ecology of Stenella longirostris

Main Ref.	Tan, J.M.L., 1995
Remarks	Reside in coastal waters (Ref. 97368). May seek shelter in shallow sandy bottoms to protect themselves from predators (Ref. 80498). Observed year-round during daytime in sheltered bays or within lagoons. Forming schools ranging in size from 15 to 30 individuals to as large as 100 to 140 individuals (Ref. 97372). Feeds predominantly at night on deeper, offshore waters (Ref. 122680) and rest during much of the day (Ref. 1394); on small (5 to 10 cm long) fishes, shrimps, and squid in deep offshore waters from the mesopelagic boundary. Follows the diel horizontal migration as well as the vertical migrations of its prey (Refs. 97368).

Main Ref.

Tan, J.M.L., 1995

Remarks

Reside in coastal waters (Ref. 97368). May seek shelter in shallow sandy bottoms to protect themselves from predators (Ref. 80498). Observed year-round during daytime in sheltered bays or within lagoons. Forming schools ranging in size from 15 to 30 individuals to as large as 100 to 140 individuals (Ref. 97372). Feeds predominantly at night on deeper, offshore waters (Ref. 122680) and rest during much of the day (Ref. 1394); on small (5 to 10 cm long) fishes, shrimps, and squid in deep offshore waters from the mesopelagic boundary. Follows the diel horizontal migration as well as the vertical migrations of its prey (Refs. 97368).

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 Stenella longirostris may be found.

Habitat

Substrate	Pelagic;
Substrate Ref.	Tan, J.M.L., 1995
Special habitats
Special habitats Ref.

Associations

Ref.	Tan, J.M.L., 1995
Associations	schooling;
Associated with
Association remarks	In Tahiti, French Polynesia, school sizes range from as small as 15 to 30 to as large as 100 to 140 individuals (Ref. 97372).
Parasitism

feeding

Feeding type	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Jefferson, T.A., S. Leatherwood and M.A. Webber, 1993
Feeding habit	hunting macrofauna (predator)
Feeding habit Ref.	Jefferson, T.A., S. Leatherwood and M.A. Webber, 1993

Trophic Level(s)

Estimation method	original sample		unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition	4.44	0.77			Troph of juv./adults.
From individual food items	4.50	0.88			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.	Dolar, M.L.L., W.A. Walker, G.L. Kooyman and W.F. Perrin, 2003

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