Ecology Summary - Hyporhamphus quoyi

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Main Ref.	Nakamura, Y., M. Horinouchi, T. Nakai and M. Sano, 2003
Remarks	Inhabits more turbid and estuarine situations than does Hyporhamphus dussumieri and is not found in oceanic islands (Ref. 9843). May enter rivers (Ref. 559). Found in medium to large-sized rivers of the lower Mekong (Ref. 12975); also inhabits coral reefs (Ref. 58534). Occurs in schools (Ref. 3132). Showed an ontogenetic trophic shift the smallest individuals are carnivores that pass through a brief period as omnivores before achieving the adult trophic habit of herbivory (Ref. 57260).

Main Ref.

Nakamura, Y., M. Horinouchi, T. Nakai and M. Sano, 2003

Remarks

Inhabits more turbid and estuarine situations than does Hyporhamphus dussumieri and is not found in oceanic islands (Ref. 9843). May enter rivers (Ref. 559). Found in medium to large-sized rivers of the lower Mekong (Ref. 12975); also inhabits coral reefs (Ref. 58534). Occurs in schools (Ref. 3132). Showed an ontogenetic trophic shift the smallest individuals are carnivores that pass through a brief period as omnivores before achieving the adult trophic habit of herbivory (Ref. 57260).

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 Hyporhamphus quoyi may be found.

Habitat

Substrate
Substrate Ref.
Special habitats	Beds: sea grass; Coral Reefs;
Special habitats Ref.	Nguyen, N.T. and V.Q. Nguyen, 2006

Associations

Ref.	Allen, G.R. and R. Swainston, 1988
Associations	schooling;
Associated with
Association remarks
Parasitism

Feeding

Feeding type	mainly animals (troph. 2.8 and up)
Feeding type Ref.	Weliange, W.S. and U.S. Amarasinghe, 2007
Feeding habit	variable
Feeding habit Ref.	Weliange, W.S. and U.S. Amarasinghe, 2007

Trophic Level(s)

Estimation method	Original sample		Unfished population		Remark
Estimation method	Troph	s.e.	Troph	s.e.	Remark
From diet composition	3.02	0.00	3.01	0.21	Troph of juv./adults from 2 studies.
From individual food items	2.86	0.31			Trophic level estimated from a number of food items using a randomized resampling routine.
Ref.	Weliange, W.S. and U.S. Amarasinghe, 2007

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