بينات المظهر الخارجي للـ Oreochromis lidole
مفاتيح التعريف
Abnormalities
المرجع الرئيسي Trewavas, E., 1983
المظهر يشير الى ذكر; أنثى
Bones in OsteoBase

Sex attributes

أعضاء متخصصه genital papilla with tassels (m)
مظاهر مختلقة different morphology during breeding season only
الوان مختلفة different colors during breeding season only
ملاحظات Ripe male black (Ref. 2, 4967, 6150, 40193) with white margin to dorsal and often also caudal and anal fins (Ref. 2). Female or juvenile color dark grey (Ref. 2, 6150).

الخصائص الوصفية للصغار والبالغين

ملامح مذهلة none
شكل الجسم الجانبي fusiform / normal
المقطع العرضي compressed
شكل ظهر الراس clearly convex
نوع العيون more or less normal
نوع الفم/ الخطم more or less normal
موقع الفم terminal
Type of scales cycloid scales
التشخيص

Diagnosis: breeding male black; length of head 34.4-42.4% SL; length of lower jaw 31.3-40.0% head length (Ref. 2). Teeth of jaw in 3-4, rarely 5 rows (Ref. 2,6150). Lower pharyngeal bone with restricted toothed area; median length of bone 33.0-40.7 % length of head and 1.3-1.5 times its own width; blade 1.9-3.9 times median length of toothed area (Ref. 2).

Description: lower outline of body flat (Ref. 2781). Deepest part of body generally in front of anterior end of dorsal fin (Ref. 2781, 52161, 55427). Head large (Ref. 2781, 4967, 6150, 55079). Relative size of head increases with growth (Ref. 2). Jaws large (Ref. 2781, 55079). Small jaw teeth (Ref. 2) in narrow bands (Ref. 2, 2781, 4967). Reduced dentition, 3-5 regular rows of teeth (Ref. 55079). 2-3 series of scales on cheek, occasionally a few small scales of a 4th row (Ref. 54852). Lower pharyngeal bone long-bladed (Ref. 55079), slender (Ref. 6150), with concave sides (Ref. 2781, 52161, 55427), supporting a small toothed area (Ref. 2781, 6150, 54852, 55079) with very fine teeth (Ref. 54852). Scaly coating of caudal fin rarely obscuring outlines of rays (Ref. 55427).

Coloration: ripe male black (Ref. 2, 87, 2781, 4967, 6150, 40193) with white margin to dorsal (Ref. 2, 2781) and often also caudal and anal fins (Ref. 2). Males lose their black coloration in a few seconds on being alarmed, turning a pale grey, often with iridescent greenish or coppery areas on the flanks or head (Ref. 40193). Non-breeding fishes are silver-grey to fawn-grey, darker on the dorsum, with black vertical bars of uneven length from the dorsum to mid-flanks, but these may be dimmed (Ref. 2). Small specimens and females with 5 dark blotches, vertically drawn out, along the side and some with 2 fainter on the caudal peduncle; vaguer markings in a more dorsal row; females without marginal dorsal band; caudal fin clear in small specimens (Ref. 54852). Juveniles are shallow-bodied with a flat belly, possess a Tilapia-mark which is often dumbell-shaped and usually surrounded with yellow pigment, and have a blue sheen and fairly definite vertical black stripes on the body (Ref. 2781).

سهل التعريف

Meristic characteristics of Oreochromis lidole

الخطوط الجانبية 1 متقطع: No
Scales on lateral line 32 - 35
Pored lateral line scales
Scales in lateral series
Scale rows above lateral line 4 - 5
Scale rows below lateral line
Scales around caudal peduncle 20
Barbels 0
الشقوق الخيشومية ( القروش/ اسماك الري) absent
Gill rakers
على الطرف السفلي 17 - 22
على الطرف العلوي 2 - 4
المجموع
فقرات
قبل الشرج
المجموع 30 - 32

زعانف

الزعنفة الظهرية

السمات extending over most of the back length
عدد الزعانف 1
Finlets No. Dorsal   0
Ventral  0
ادوات اللأشواك 14 - 17
مجموع الأشعة اللينة 10 - 11
Adipose fin absent

الزعنفة الذيلية

السمات more or less truncate; more or less normal

الزعنفة الشرجية

عدد الزعانف 1
ادوات اللأشواك 3 - 3
مجموع الأشعة اللينة 8 - 10

Paired fins

Pectoral السمات  more or less normal
اشواك     
اشعة لينة   
Pelvics السمات  more or less normal
الموقع    thoracic  beneath origin of D1
اشواك     
اشعة لينة   
العودة الي البحث
التعليقات و التصحيح
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