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Hemitrygon laosensis (Roberts & Karnasuta, 1987)

Mekong stingray
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Image of Hemitrygon laosensis (Mekong stingray)
Hemitrygon laosensis
Picture by Warren, T.


Thailand country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: minor commercial | Ref: Wongrat, P., 1998
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Reported from Mekong river (Chiang Rai), Nong Khai and Loei (Ref. 37773) and Chao Phraya basin (Ref. 9840). Found in Chiang Kham dist. Chieng Rai province (Ref. 33021). Caught with seines or hook and lines and sold fresh in local markets (Ref. 32457). Museum: Mekong river Chiang Kham district, Chieng Rai province, Thailand, BMNH 1985.9.26.1-2 (Ref. 31982). Also Ref. 9840, 11430, 26636, 43281.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/th.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Wongrat, P., 1998
National Database:

Common names from other countries

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | ITIS | CoL | WoRMS | Cloffa

Пластиножаберные (акулы и скаты) (sharks and rays) > Myliobatiformes (Stingrays) > Dasyatidae (Stingrays) > Dasyatinae
Etymology:   More on authors: Roberts & Karnasuta.

Environment: milieu / climate zone / depth range / distribution range экология

; пресноводный демерсальный; мигрирует в реке (Ref. 51243).   Tropical

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | Faunafri

Southeast Asia: endemic to the Mekong River (Cambodia and Thailand); introduced to Chao Phraya River (Thailand).

Size / Вес / Возраст

Maturity: Lm ?  range ? - ? cm
Max length : 62.0 cm WD самец/пол неопределен; (Ref. 27732); наибольший вес (опубликованные данные): 6.0 kg (Ref. 27732)

Краткое описание определительные ключи | морфология | морфометрия

колючие лучи спинного плавника (общее число) : 0; колючие лучи анального плавника: 0. Distinguished from the other stingray species in the Mekong basin by the presence of a ventral and a dorsal skin folds on the tail and the bright orange color of the ventral surface of the disc. The middle disc is whitish with scattered large orange spots. The dorsal surface of the disc is brown (Ref. 27732). Disc longer than wide; tail longer than body (Ref. 12693). Lacking caudal fin; with long whip-like tail (Ref. 43281).

биология     глоссарий (например epibenthic)

Obligate freshwater stingray that occurs over sandy substrate in large rivers. Feeds on bottom-dwelling invertebrates (Ref. 12693). Ovoviviparous (Ref. 50449). Marketed fresh (Ref. 32457).

Life cycle and mating behavior Maturities | размножение | Spawnings | Egg(s) | Fecundities | личинки

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). Distinct pairing with embrace (Ref. 205).

Основная ссылка Upload your references | ссылки | координатор : McEachran, John | соавторы

Last, P.R. and L.J.V. Compagno, 1999. Dasyatididae. Stingrays. p. 1479-1505. In K.E. Carpenter and V.H. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Vol. 3. Batoid fishes, chimaeras and bony fishes part 1 (Elopidae to Linophrynidae). FAO, Rome. (Ref. 9840)

Статус Красного Списка МСОП (Ref. 130435)

  Под угрозой исчезновения (EN) (A2bcd); Date assessed: 25 January 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

  Harmless




Использование человеком

рыболовство: не имеет хозяйственного значения
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дополнительная информация

Trophic ecology
пищевые объекты
Diet compositions
Food consumptions
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хищники
Ecology
экология
Home ranges
Population dynamics
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Max. ages / sizes
Length-weight rel.
Length-length rel.
Размерный состав
Mass conversions
Recruitments
Abundances
Life cycle
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Maturities
Fecundities
Spawnings
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Egg(s)
Egg developments
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Distribution
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регионы FAO
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интродукции
BRUVS - Videos
Anatomy
Gill areas
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Otoliths
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Body compositions
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Visual pigment(s)
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Toxicities (LC50s)
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World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00265 - 0.01571), b=3.06 (2.86 - 3.26), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.5   ±0.37 se; based on food items.
устойчивость к внешним воздействиям (Ref. 120179):  очень низкий, минимальное время удвоения популяции более 14 лет (Assuming Fec<10).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).
Категория цены (Ref. 80766):   Low.