Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii (sharks and rays) > Carcharhiniformes
(Ground sharks) > Triakidae
(Houndsharks) > Galeorhininae
Etymology: Hemitriakis: Greek, hemi = half + Greek, triakis = three times (Ref. 45335); indroyonoi: Named for Dr. Indroyono Soesilo, who has provided a great deal of support for shark research in Indonesia and was a strong advocate for the production of the field guide to sharks and rays of
Indonesia (White et al., 2006).
Environment / Climate / Range
Marine; demersal. Tropical; 9°N - 8°N, 115°E - 117°E
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 90 - ? cm
Max length : 120 cm TL male/unsexed; (Ref. 80994); 115.2 cm TL (female)
Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri
Indian Ocean: known only from off the islands of Bali and Lombok in eastern Indonesia (Ref. 80994).
Presumably occurring on the outer continental shelf and upper slope. Females have litters of 6-11 where reproductive mode is viviparous, with histotrophy (no yolk-sac placenta); size at birth about 28- 30 cm TL (Ref. 80994).
White, W.T., L.J.V. Compagno and Dharmadi, 2009. Hemitriakis indroyonoi sp. nov., a new species of houndshark from Indonesia (Carcharhiniformes: Triakidae). Zootaxa 2110:41-57.
IUCN Red List Status (Ref. 90363)
Threat to humans
CountriesFAO areasEcosystemsOccurrencesIntroductionsStocksEcologyDietFood itemsFood consumptionRation
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
CollaboratorsPicturesStamps, CoinsSoundsCiguateraSpeedSwim. typeGill areaOtolithsBrainsVision
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00160 - 0.00946), b=3.09 (2.88 - 3.30), based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic Level (Ref. 69278
): 0.0 ±0.0 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Low, minimum population doubling time 4.5 - 14 years ().
Vulnerability (Ref. 59153
): High vulnerability (64 of 100) .