Boraras naevus

Boraras naevus Conway & Kottelat, 2011

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Boraras naevus
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> Cypriniformes (Carps) > Danionidae (Danios) > Rasborinae
Etymology: Boraras: A name for a fish used in Borneo = "boraras merah";  naevus: From the Latin naevus, a spot, a mark on skin, a blemish, in allusion to the large sexually dichromatic blotch on the side of the body. A noun in apposition (Ref. 87760).
More on authors: Conway & Kottelat.

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

; المياه العذبة محيطي. Tropical

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Asia: Thailand. Type locality, in a swampy area north of Surat Thani. The species is reported to have a wider distribution in the lower Tapi drainage, on the Gulf of Thailand slope of peninsular Thailand. It is suspected that most of its natural habitats (swamps) has been transformed into paddy fields. Additional populations, or another, similar species is known from the Andaman Sea slope of the Malay Peninsula near Trang (Ref. 87760).

الحجم / وزن / العمر

Maturity: Lm ?  range ? - ? cm
Max length : 1.3 cm SL ذكر/ مختلط الجنس; (Ref. 87760)

وصف مختصر الوصف الخارجي | قياسات المظهر الخارجي

Boraras naevus is distinguished from its congeners with a similar blotched color pattern (viz. B. maculatus and B. micros) by pronounced sexual dimorphism of the anteriormost blotch situated on the body side, which is a small circular marking of roughly orbit size or smaller in females and a large dorso-ventrally orientated oval-shaped marking larger than the orbit in males (vs. anteriormost blotch similar in size and shape in both sexes) and by its lower number of principal caudal-fin rays (9+8 vs. 9+9 in B. micros, 9–10+9 in B. maculatus). It is further distinguished from B. maculatus by its lower number of body scales in the midlateral row (24–26 vs. 26–29), and its lower number of pelvic-fin rays (i.5.i vs. i.6.i), and from B. micros by its higher number of body scales in the midlateral row (24–26 vs. 22–23), higher number of branched dorsal-fin rays (7 vs. 5–6), the presence of red and black pigment along the anterior edge of the dorsal and anal fins of males in life (vs. all fins transparent without red or black pigmentation in life in both sexes), the presence of infraorbital 4 (vs. infraorbital 4 absent), infraorbital 2 contacting both infraorbital 1 and infraorbital 3 (vs. infraorbital 2 greatly reduced in size, without contact with adjacent infraorbital bones), and the presence of the mesocoracoid (vs. mesocoracoid absent). Boraras naevus can be distinguished from the remaining species of Boraras (B. brigittae, B. merah and B. urophthalmoides) by the absence of a midlateral stripe (vs. broad, uninterrupted midlateral stripe from upper extremity of gill opening to middle of caudal-fin base in B. brigittae and B. urophthalmoides; or narrow, frequently interrupted midlateral stripe from above anal-fin origin to middle of caudal-fin base in B. merah) (Ref. 87760).

أحياء     المصطلحات (على سبيل المثال epibenthic)

Life cycle and mating behavior النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae

المرجع الرئيسي Upload your references | مراجع | المنظم | المتعاونين

Conway, K.W. and M. Kottelat, 2011. Boraras naevus, a new species of miniature and sexually dichromatic freshwater fish from peninsular Thailand (Ostariophysi: Cyprinidae). Zootaxa 3002:45-51. (Ref. 87760)

IUCN Red List Status (Ref. 125652)

  نقص البينات (DD) ; Date assessed: 30 January 2013

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان

  Harmless





استخدامات بشرية

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مزيد من المعلومات

دول
مناطق الفاو
النظام البيئي
الظهور
مقدمة
Stocks
البيئة
التغذية
عناصر الغذاء
استهلاك الأغذية
Ration
الأسماء الشائعة
مرادفات
الأيض
مفتريسات
علم السميات البيئية
التكاثر
النضج
وضع البيض
تجمعات وضع البيض
الخصوبة
بيض
تطور البيضة
العمر/ الحجم
نمو
الطول-الوزن
الطول-الطول
الطول- الترددات
قياسات المظهر الخارجي
الوصف الخارجي
Larvae
حركة انتقال اليرقات
توظيف
الوفرة
BRUVS
مراجع
الأستزراع المائي
ملف الأستزراع المائي
سلالات
جيني
تواتر الأليل
التوريث
الأمراض
معالجة
Nutrients
Mass conversion
المتعاونين
صور
Stamps, Coins Misc.
اصوات
التسمم باكل السمك
سرعة
نوع السباحة
منطقة الخياشيم
عظمة الأذن
دماغ
رؤية

أدوات

تقارير خاصة

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مصادر علي الأنترنت

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00354 - 0.01952), b=3.09 (2.89 - 3.29), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245).
مستوى غذائي (Ref. 69278):  2.8   ±0.4 se; based on size and trophs of closest relatives
المرونه
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .
Climate Vulnerability (Ref. 125649):   (0 of 100) .