Classification / Names
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Cypriniformes (Carps) >
Nemacheilidae (Brook loaches)
Etymology: zonalternans: The specific name is derived from the Latin zonatus (girdle or a belt) and alterno, to be variegated or with two alternate colors..
More on author: Blyth.
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
; น้ำจืด สัตว์น้ำหน้าดิน; pH range: 6.8 - 7.8; dH range: 8 - 18. Tropical; 24°C - 26°C (Ref. 13614)
Asia: Salween River drainage in Thailand and Myanmar.
ขนาด / น้ำหนัก / Age
Maturity: Lm ? range ? - ? cm
Max length : 12.2 cm TL เพศผู้/กระเทย; (Ref. 125890); น้ำหนักสูงสุดที่มีการรายงาน: 21.48 g (Ref. 125890)
Paracanthocobitis zonalternans differs from all its congeners by combination of the following characters: lateral line incomplete, ending near insertion of dorsal fin; dorsal fin with 9½-10½ branched rays; presence of axillary pelvic lobe; series of black blotches, usually without black stripe but with faint dusky stripe, along side of body, usually ending near dorsal-fin insertion; circular black spot on upper margin of caudal-fin base; black pigment extending from lateral stripe onto pectoral-fin base; absence of marmorated pattern anterior to origin of dorsal fin; dorsal saddles short, rarely connecting to lateral blotches; and upper caudal fin with 8 (occasionally 7) branched rays (Ref. 117351).
Found in a variety of streams from river mainstreams to small brooks. Apparently avoids mountain streams with steep gradient and prefer shallow riffles over small pebbles above which its marmorated color pattern makes it inconspicuous from the surface. Also collected on a muddy to sandy substrate with a few stones and numerous gastropod shells in depths ranging from 0.05 to 0.5 m.
Life cycle and mating behavior
Maturities | การสืบพันธุ์ | Spawnings | Egg(s) | Fecundities | ตัวอ่อน
Singer, R.A., J.M. Pfeiffer and L.M. Page, 2017. A revision of the Paracanthocobitis zonalternans (Cypriniformes: Nemacheilidae) species complex with descriptions of three new species. Zootaxa 4324(1):85-107. (Ref. 117351)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00813 (0.00515 - 0.01282), b=3.01 (2.88 - 3.14), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
ระดับชั้นอาหาร (Ref.
69278): 2.7 ±0.3 se; based on size and trophs of closest relatives
ความสามารถในการกลับคืนสู่ปกติ (Ref.
120179): ขนาดกลาง, เวลาต่ำสุดที่จะทำให้ประชากรเพิ่มขึ้นเป็น 2 เท่าใช้เวลา 1.4 - 4.4 ปี (Assuming Fec < 1,000).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
