Nothobranchius derhami

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Nothobranchius derhami Valdesalici & Amato, 2019

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drawing shows typical species in Nothobranchiidae.

Classification / Names ຊື່ສາມັນ | ຄຳສັບຄ້າຍຄືກັນ | Catalog of Fishes(ຕະກຸນ, ຊະນິດ) | ITIS | CoL | WoRMS | Cloffa

> Cyprinodontiformes (Rivulines, killifishes and live bearers) > Nothobranchiidae (African rivulines)
Etymology: Nothobranchius: Greek, nothos = false + Greek, brangchia = gill (Ref. 45335);  derhami: The specific name epithet is given in honour of Patrick de Rham, Lausanne, Swiss, who first discovered the new species on the 7th of July 1985 in a grassy swamp situated near Ahero on the east side of the Nakuru to Kisumu road and for his contribution on observing in the field part of the life cycle of this species; a noun in genitive (Ref. 123202).

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

; ນ້ຳຈືດ ກ່ຽວກັບ (ຢູ່)ເທິງຊັ້ນພື້ນດິນໃນທະເລເປີດ; pH range: 7.6 - 7.6. Tropical; 25°C - 31°C (Ref. 123202)

ການແຜ່ກະຈາຍ ປະເທດ | ເຂດ FAO | ລະບົບນິເວດ | ການປະກົດຕົວ | Point map | ການແນະນຳ | Faunafri

Africa: seasonal pools from Nyando River system, Lake Victoria basin, in Kenya (Ref. 123202).

ຂະໜາດ / ນ້ຳໜັກ / Age

Maturity: Lm ?  range ? - ? cm
Max length : 3.8 cm SL ຕົວຜູ້/ບໍ່ມີເພດ; (Ref. 123202)

Short description ສະລີລະວິທະຍາ | ການວັດແທກຮູບຮ່າງລັກສະນະພາຍນອກຂອງດິນ,ສັດ,ປາ…

ຄີ (ໜາມ)ແຂງຢູ່ຫຼັງປາ (ທັງໝົດ): 0; ຄີຫຼັງຂອງປາ (ຄີອ່ອນ) (ທັງໝົດ): 15-17; ຄີ(ໜາມ) ແຂງຢູ່ຄີກົ້ນປາ ກຸ່ມປາກະດູກແຂງ ຄວາມຖີ່ຂອງກຸ່ມຖ່າຍທອດພັນ ປາທີ່ມີການເຄື່ອນຍ້າຍຈາກທະເລໄປຫານ້ຳຈືດ ແລະນ້ຳຈືດຫາທະເລ ປາທີ່ມີການເຄື່ອນຍ້າຍຈາກທະເລແລະໄປໄຂ່ຢູ່ນ້ຳຈືດ ຄີກົ້ນຂອງປາ ສັດທີ່ມີກະດູກສັນຫັຼງ ການຖ່າຍທອດທາງກຳມະພັນຈາກພໍ່ແມ່ຫາລູກ 0; ຄີກົ້ນຂອງປາ: 15 - 17; ສັດທີ່ມີກະດູກສັນຫຼັງ: 27. Diagnosis: Nothobranchius derhami belongs to the N. ugandensis species group presenting the following combination of characters in males: body colouration light blue with red to red-brown scale margins; frontal part of headred-brown and throat light blue or red, caudal fin uniform red; anal fin light blue or yellow with red-brown spotted pattern (Ref. 123150). It differs from all members of the N. ugandensis species group by a dorsal fin with a slender light blue subdistal band and a narrow black distal band; an anal fin with broad subdistal zone cream to yellow, with narrow red-brown to black distal band; and a smaller suborbital depth, 16-18% of head length vs. 19-28% (Ref. 123150). Males from Nothobranchius derhami are distinguished from the similar N. ugandensis by lower jaw light blue vs. lower jaw red in red morph or grey brown in yellow morph of N. ugandensis, upper lip and snout red vs. grey brown on yellow morph, the body sides with red irregular vertical stripes vs. without red pattern in yellow morph, by dorsal fin with subdistal blue stripe and broad black rim vs. without defined subdistal stripe and rim, by anal fin with spots vs. without spots or if present reduced to a few dots, and caudal fin plain red vs. yellowish with a black marginal stripe and with or without dark dots in the yellow morph, red anteriorly, orange posteriorly and with a black margin in some of the red morph (Ref. 123202). Males of N. derhami are distinguished from the congener, nearest in distribution, N. robustus, by light blue with posterior margin of the scale red creating a banded pattern on flank vs. intense plain red colouration on whole flank, or at least on posterior half portion, by light blue proximal portion with a pattern of red spots on dorsal, anal and pelvic fin vs. fins completely red (Ref. 123202).

ຊີວະສາດ     ຄຳແປສັບ (ຕ.ຢ. epibenthic)

Found in seasonal pools less than 1 m deep and with aquatic vegetation; the water was light clay grey and turbid, with a pH of 7.6 and temperature ranging from 25-31°C depending on the position in the water column (Ref. 123202).

Life cycle and mating behavior ການຈະເລີນເຕັມໄວ | ການສືບພັນ | ການວາງໄຂ່ | ໄຂ່ | ຄວາມດົກຂອງໄຂ່ປາ | ຕົວອ່ອນ

Main reference Upload your references | ເອກະສານອ້າງອີງ | ຜູ້ປະສານງານ | ຜູ້ຮ່ວມມື

Valdesalici, S. and G. Amato, 2019. Nothobranchius derhami (Cyprinodontiformes: Nothobranchiidae), a new species of seasonal killifish from western Kenya. Aqua, Int. J. Ichthyol., 25(3):111-124. (Ref. 123202)

IUCN Red List Status (Ref. 130435)

  Endangered (EN) (B1ab(iii)+2ab(iii)); Date assessed: 18 May 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
ຊັ້ນເຂດຮ້ອນ (Ref. 69278):  3.2   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).