Overview

Comprehensive Description

Biology

A little-known tropical shark found on the uppermost insular slopes (Ref. 13563) at depths of 250-475 m (Ref.58048). Feeds on cephalopods (Ref. 244). Viviparous, placental (Ref. 50449). Caught irregularly by the small-scale demersal longline fisheries operating in deepwater. Utilized for its meat and fins, but of limited value due to its small size (Ref.58048).
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Distribution

Range Description

Recorded from the Eastern Indian in northwestern Australia from off Shark Bay (Western Australia) to off Darwin (Northern Territory) and the West Pacific from off tropical Queensland (between Townsville and Cairns) and Vanuatu.
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Western Central Pacific: Australia (including Western Australia, Ref. 6871), Vanuatu, and the Philippines (Ref. 47737),
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Indo-West Pacific.
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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Analspines: 0; Analsoft rays: 0
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Size

Maximum size: 750 mm TL
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Max. size

75.0 cm TL (male/unsexed; (Ref. 244))
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Recorded in tropical waters on the continental slope at depths of 250 to 475 m. Maximum size at least 75 cm total length (TL). Born at about 25 cm TL and males mature at about 45 cm TL. The species is viviparous with a yolk-sac placenta with litters of 4 to 5 young. Diet consists mainly of cephalopods. Nothing else known of its biology.

Systems
  • Marine
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Environment

bathydemersal; marine; depth range 250 - 475 m (Ref. 6871)
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Depth range based on 9 specimens in 1 taxon.
Water temperature and chemistry ranges based on 7 samples.

Environmental ranges
  Depth range (m): 71 - 559
  Temperature range (°C): 6.985 - 24.491
  Nitrate (umol/L): 1.862 - 31.805
  Salinity (PPS): 34.471 - 34.998
  Oxygen (ml/l): 2.162 - 4.483
  Phosphate (umol/l): 0.273 - 2.220
  Silicate (umol/l): 4.732 - 54.593

Graphical representation

Depth range (m): 71 - 559

Temperature range (°C): 6.985 - 24.491

Nitrate (umol/L): 1.862 - 31.805

Salinity (PPS): 34.471 - 34.998

Oxygen (ml/l): 2.162 - 4.483

Phosphate (umol/l): 0.273 - 2.220

Silicate (umol/l): 4.732 - 54.593
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 250 - 475m.
From 250 to 475 meters.

Habitat: bathydemersal. Found on the uppermost insular slopes. Feeds on cephalopods. Viviparous (with a yolk-sac placenta), with 4 or 5 young per litter. Size at birth near 23 cm (full-term fetuses). Males mature at about 45 cm (Ref. 6871).
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Trophic Strategy

A little-known tropical shark found on the uppermost insular slopes. Feeds on cephalopods.
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Life History and Behavior

Life Cycle

Viviparous, placental (Ref. 50449). With 4 or 5 young per litter (Ref. 244). Size at birth near 23 cm (full-term fetuses) (Ref. 244). Distinct pairing with embrace (Ref. 205).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Iago garricki

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2003

Assessor/s
Kyne, P.M. & Cavanagh, R.D. (SSG Australia & Oceania Regional Workshop, March 2003)

Reviewer/s
Shark Specialist Group Australia & Oceania Regional Group (Shark Red List Authority)

Contributor/s

Justification
A small houndshark reported from northwestern Western Australia, Queensland and Vanuatu. Recorded from the continental slope at depths of 250 to 475 m. The species produces small litters of 4 to 5 young, but little else is known of its biology. It is of minor interest to fisheries although it is likely to be taken as bycatch in the small Australian Commonwealth managed North West Slope Trawl Fishery. More information is needed on its biology and abundance, particularly as it seems to be naturally rare.
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Population

Population
No information available on populations.

Population Trend
Unknown
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Threats

Major Threats
Iago garricki is of minor interest to fisheries (Compagno and Niem 1999). It is likely to be taken as bycatch in the Australian Commonwealth managed North West Slope Trawl Fishery which operates at depths of >200 m off northwestern Western Australia. This fishery is small and no actual data on bycatch levels are available (Harris and Ward 1999).
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There are currently no conservation measures in place for this species.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: minor commercial; price category: high; price reliability: very questionable: based on ex-vessel price for species in this family
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Wikipedia

Longnose houndshark

The longnose houndshark, Iago garricki, is a hound shark of the family Triakidae found in the western Pacific off northern Australia and Vanuatu between latitudes 9° S and 26° S, at depths of between 250 and 475 m. Its length is up to 75 cm.

References[edit]

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