Roa jayakari (Norman, 1939)

Panda, Biswajit, Mohanty, Swarup Ranjan & Mohapatra, Anil, 2018, First report of Roa jayakari (Norman, 1939) (Perciformes: Chaetodontidae) from Odisha coast, India, Records of the Zoological Survey of India 118 (3) : -

Roa jayakari (Norman, 1939)

Indian golden-barred butterflyfish

1939. Coradion jayakari, Norman ; Fishes. The John Murray Expedition 1933-34. Scientific Reports, John Murray Expedition v. 7 (no. 1): 1-116.

1939. Chaetodon jayakari, Norman ; Fishes. The John Murray Expedition 1933-34. Scientific Reports, John Murray Expedition v. 7 (no. 1): 1-116.

Material examined: 2 specimens; Standard Length (SL): 81- 77 mm; Collection Site: Chandipur Coast (21°30 ʹ - 21°43 ʹ N; 87°13 ʹ - 87°24 ʹ E), Odisha, Date of collection :

14. 02. 2017; Registration No. MARC /ZSI/F 4646 .

Meristic Formula: D: XI, 22; A: III, 18; P: 15; V: I, 5.

Characters: The details of morphometric measurements were presented in Table 1. The body is disc shaped and strongly compressed (depth 66.93-70.76% in SL). Body and head covered with large ctenoid scales gradually become smaller towards the snout. Head profile concave; Head length (HL) 48.38 – 49.23% in SL; snout moderately long, snout length 21.87-23.33% in head length; eye diameter slightly greater than length of snout, 31.25-

33.33% in head length; interorbital space small with

21.87-23.33% in HL; origin of dorsal fin above posterior end of head, the fin base long, the base of spinous section almost horizontal curving gradually downward and the posterior margin of fin vertical, 4 th dorsal spine length

30.64-30.76% in SL. Anal fin with 3 spines and 18 soft rays; 2 nd anal spine length 40.62-43.33% in HL. Pectoral fin rays 15, its length 32.30-33.87% in SL; ventral fin with single spine and 5 rays. Lateral line with 19-20 scales in an almost straight line, gradually become downward. Caudal fin truncated.

There are three vertical dark brown bands with golden tint altered with whitish inter spaces. The first band is narrow and extends from anterior tip of dorsal fin along the eye to the jaw; second band broadest and extends from 3 rd and 5 th dorsal spines to the abdomen, third band extends below the last three dorsal spines towards caudal peduncle. All fin spines are white in colour, two broad white bands present on the body. Caudal fin clear with pale yellow colour; pelvic fin rays are brown to dusky. Pelvic fin is blackish in colour. A black, round ocellus with white border is present in between the second and seventh soft dorsal fin ( Figure 1 ).

Morphometric characters Roa jayakari (Norman, 1939)

Total length (mm) 77-81

Standard length 62-65

Body depth 41.5-46

Head length 30-32

Pre dorsal length 33.5-34

Pre pectoral length 31-33

Pre pelvic length 31-33

Pre anal length 46-50

4 th Dorsal spine height 19-20

2nd anal spine height 13

Pectoral length 21

Pelvic spine length 16.5-17

Soft pelvic length 19-21

Head depth 24-25

Head width 11

Eye diameter 10

Pre orbital length 9

Post orbital length 8

Inter orbital space 7

Upper jaw length 5-5.5

Lower jaw length 5

Maxillary width 6-6.5

Snout length 7 Distribution: Roa jayakari (Norman, 1939) distribution ranges from Red Sea, Gulf of Aden, Gulf of Oman, southern Arabian coast, and west coast of India ( Burgess, 1978). From Indian waters this species is reported from Visakhapatnam coast, Andhra Pradesh, ( Behera et al., 2015; Krishna et al., 2016) Gulf of Mannar, Tamil Nadu ( Padate et al., 2014), Kerala ( George and Dayanandan, 1966).

Figures

Figure 1. Roa jayakari (Norman, 1939) collected from Chandipur coast.