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Acanthuriformes (Surgeonfishes) >
Siganidae (Rabbitfishes)
Etymology: Siganus: Latin, siganus = a fish, rabbit fish; by the similarity of the nose (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
সামুদ্রিক; ঈষৎ লোনা রীফ সংশ্লিষ্ট; মহাসাগরে বিচরনক্ষম (Ref. 51243); গভীরতার পরিসীমা 1 - 50 m (Ref. 9813). Tropical; 30°N - 35°S, 49°E - 174°W
Indo-West Pacific: Persian Gulf, Gulf of Oman, Pakistan, India, Sri Lanka, Burma, Thailand, Singapore, Malaysia, Indonesia, Papua New Guinea, Philippines, Cambodia, Viet Nam, south China, Taiwan and Western Australia. Also known from Ryukyu Islands; Palau and Yap in Micronesia (Ref. 1602) and Melanesia (Ref. 712).
Length at first maturity / আকৃতি / ওজন / Age
Maturity: Lm 11.6, range 12 - ? cm
Max length : 40.0 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 108696); common length : 20.0 cm TL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 9813)
পৃষ্ঠীয় কাঁটা (মোট ): 13; পৃষ্ঠীয় নরম পাখনা দন্ড (মোট ): 10; পায়ূ কাঁটা 7; পায়ূর নরম পাখনা্তুন্ড: 9; কশেরুকা : 23. This species is distinguished by the following characters: body compressed, moderately slender, its depth 2.3-2.8 in SL; last anal-fin spine 1.2-1.5 times in longest anal-fin spine (usually the third); soft parts of dorsal and anal fins low, longest dorsal-fin ray 0.7-1 times in longest dorsal-fin spine; caudal fin almost emarginate in specimens under 10 cm standard length, forked in larger fish; 16-26 (rarely 27) scale rows between lateral line and bases of leading dorsal-fin spines. Colour of body highly variable, greenish grey to yellow brown with numerous (100-200) pearly blue to whitish spots on nape and trunk, match-head size on lower sides; 2-3 rows between first spine of dorsal fin and lateral line (area of eye would cover about 6 spots in this region), and about 10 rows between highest point of lateral line and base of first anal-fin spine; when frightened or injured, sides mottled light and dark brown and cream, creating 6 or 7 regularly spaced, dark diagonal zones with paler zones of similar width between them; dark eye-sized spot usually just behind upper end of gill opening, and a narrow bar along upper edge of gill cover (Ref. 9813, 90102).
Adults inhabit inshore, algae reefs, estuaries and in large lagoons with algae-rubble habitats. Mainly common on rocky substrates (Ref. 48637). In contrast to S. fuscescens, this species seems to tolerate more turbid waters, occurring within the vicinity of river mouths especially around seagrass beds. Adults also occur several kilometers offshore in deep, clear waters. Juveniles form very large schools in shallow bays and coral reef flats; school size reduces with size, with adults occurring in groups of 20 individuals or so. Herbivorous, feed on benthic algae and to some extent on seagrass. Fished by trawling and seine netting; bycatch in traps set in deep water and marketed fresh in very large numbers (Ref. 9813). Consumed as food; and have poisonous spines (Ref. 4537).
Multiple spawner (Ref. 1753). Larger fish may spawn more than once in a spawning season (Ref. 1753). Spawn in group (Ref. 240).
Woodland, D.J., 1990. Revision of the fish family Siganidae with descriptions of two new species and comments on distribution and biology. Indo-Pac. Fish. (19):136 p. (Ref. 1419)
IUCN Red List Status (Ref. 130435)
Human uses
মৎস্য: বাণিজ্যিক; এ্যাকুয়াকালচার (জলজ পালন) : বাণিজ্যিক
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ইন্টারনেট সুত্র
Estimates based on models
Preferred temperature (Ref.
123201): 24.7 - 29.1, mean 28.3 °C (based on 1218 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01445 (0.01148 - 0.01820), b=2.98 (2.93 - 3.03), in cm total length, based on LWR estimates for this species (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 2.8 ±0.31 se; based on food items.
Generation time: 0.7 (0.4 - 2.6) years. Estimated as median ln(3)/K based on 14
growth studies.
স্থিতিস্থাপক (Ref.
120179): মাধ্যম , সর্বনিম্ন প্রজন দ্বিগুনের সময় ১.৪-৪.৪ বৎসর (K=1.5-2.0; tm=1; tmax=7.8).
Fishing Vulnerability (Ref.
59153): Low vulnerability (18 of 100).
Nutrients (Ref.
124155): Calcium = 62.1 [27.3, 253.1] mg/100g; Iron = 1.48 [0.59, 3.82] mg/100g; Protein = 19.6 [17.9, 21.4] %; Omega3 = 0.15 [0.05, 0.50] g/100g; Selenium = 64.9 [15.3, 215.3] μg/100g; VitaminA = 7.95 [1.29, 45.87] μg/100g; Zinc = 2.44 [0.87, 5.78] mg/100g (wet weight);
