SIGANUS DOLIATUS - (GUERIN-MENEVILLE, 1829-38)
Actinopterygii (Gigaclass) > Actinopteri (Class) > Teleostei (Subclass) > Acanthuriformes (Order) > Siganidae (Family) > Siganus (Genus)
Picot à lignes bleues, Vrai picot, Sigan barré, Amphacanthe cerclé, Picot cerclé, Barhead spinefoot, Barred rabbitfish, Barred spinefoot, Two barred rabbitfish, Pencil-streaked spinefoot Pencil-straeked rabbitfish, Pez conejo rayado, 大瓮篮子鱼,
Description
Épines dorsales (Total) : 13; Rayons mous dorsaux (Total) : 10; Épines anales : 7; Rayons mous anaux : 9; Rayons nageoires pectorales : 16-19; Rangées d'écailles au-dessus de la ligne latérale : 18-26; Hauteur du corps : 1.8-2.4 en SL, hauteur de la tête : 3.3-3.7 en SL; Angle pré-operculaire : 97°-110°. Taille maximum : 25.0 cm SL; Généralement : 20.0 cm TL. Profondeur : 2 - 15 m.
Couleur
Le corps est bleu sur le dessus, blanc argenté sur le dessous; une bande marron traverse le corps depuis la nuque en passant par l'oeil au menton, une autre part de la base des 4ème-5èmes épines dorsales jusque sous la nageoire pectorale.
Etymologie
Siganus : transformation en Latin du mot arabe, sijān = poisson lapin. Nom donné en référence à son museau semblable aux lapins.
doliatus : du Latin, dolia, dolium = tonne, tonneau large et renflé + du suffixe Latin, -atus = suffixe adjectival qui sert à construire des adjectifs sur une base nominale indiquant la possession d'une chose ou sa qualité. Ici le mot désigne des lignes transversales ou des cercles irréguliers colorés.
Description originale : Siganus doliatus Guérin-Méneville, 1829-38 - Localité type : côtes de l'île Buru ou Bourou, voisine de la Nouvelle-Guinée, Indonésie et île de Vanikoro, archipel des îles Santa Cruz, Sud-Ouest du Pacifique.
Distribution
Sud-Est de l'océan Indien, Océan Pacifique Ouest : Indonésie, à l'Est, Tonga, au Sud, du Nord de l'Australie et Nouvelle-Calédonie.
Biologie
Se rencontre parmi les récifs coralliens et les herbiers, le plus souvent en couples. Se nourrit d'algues. Les épines des nageoires dorsale, anale et ventrales sont dotées de glandes à venin.
Espèce ressemblante
Siganus virgatus (Valenciennes, 1835) - Présent dans l'Ouest de l'Indo-Pacifique : Inde, Myanmar (ex-Birmanie) et Sri Lanka, à l'Est, Philippines, au Nord, îles Ryukyu (Japon), au Sud, Nord de l'Australie. Apparemment s'hybride parfois avec Siganus doliatus dans la région Indo-Malaise.
Synonymes
Amphacanthus doliatus (Guérin-Méneville, 1829-38)
Teuthis doliata (Guérin-Méneville, 1829-38)
Teuthis doliatus (Guérin-Méneville, 1829-38)
---------------------------
Description
Dorsal spines (total): 13; Dorsal soft rays (total): 10; Anal spines: 7; Anal soft rays: 9; Scale rows above lateral line: 18-26. Body depth: 1.8-2.4, head 3.3-3.7 times in SL. Dorsal profile of head convex; Anterior nostril with a prominent rim or short tube, a little higher and pointed posteriorly. A forward-directed spine in front of dorsal fin, imbedded in nape; Fourth to eighth dorsal-fin spine longest: 1.1-1.4 times the length of last dorsal-fin spine; Longest anal-fin spine typically the last, but subequal to second to fourth anal-fin spines which may be occasionally fractionally longer; Soft parts of dorsal and anal fins moderately high, longest dorsal-fin ray: 1-1.4 times the longest dorsal-fin spine; Caudal fin emarginate in juveniles to moderately forked in adults. Scales minute; Cheeks fully covered with strong scales. Max. length: 25.0 cm SL; Common length: 20.0 cm TL. Depth range: 1 - 15 m.
Color
Body blue above to silvery white below, decorated with about 30 yellow bar, variously joined below base of dorsal fin but free ends tapering away just above midventral line of body. A seal brown band diagonally from nape through eye to ocular, another from base of 4th to 5th dorsal spines to just below base of pectoral fin. Below eye, ocular band usually containing a pair of dark blue line running from orbit to corner of mouth. At death the brown color of the ocular and shoulder band fades, but the yellow areas contained within the bands become dark orange-brown which is much darker than other yellow markings of head and sides.
Etymology
Siganus: Latin transformation of the Arabic word, sijān = a fish, rabbit fish. Referring to the similarity of the nose.
doliatus: from Latin, dolia, dolium = a wide and rounded + from Latin suffix, -atus = used to form adjectives from nouns indicating the possession of a thing or a quality.
Original description: Siganus doliatus Guérin-Méneville, 1829-38 - Type locality: coast of Buru Island, near New Guinea, Indonesia; Vanikoro Island, Santa Cruz Islands, southwestern Pacific.
Distribution
Biology
Inhabits coral-rich areas of lagoons and seaward reefs. Juveniles form schools. Pairs form at 7 cm; But these pairs continue to form loose schools, sometimes with juvenile scarids, to feed in areas being flooded by the tide. At 20 cm, isolated pairs in deep water lagoons or on drop-offs at reef-edges feed on benthic seaweeds. Anterolateral glandular grooves with venom gland. Individuals mature at about two years of age. Individuals spawn in groups at dusk usually around the first quarter moon during warmer months.
Similar species
Siganus virgatus (Valenciennes, 1835) - Reported from Indo-West Pacific: India, Myanmar and Sri Lanka east to Philippines, north to Ryukyu Islands (Japan), south to northern Australia. Apparently hybridizes at times with Siganus doliatus in the Indo-Malayan region.
Picot à lignes bleues, Vrai picot, Sigan barré, Amphacanthe cerclé, Picot cerclé, Barhead spinefoot, Barred rabbitfish, Barred spinefoot, Two barred rabbitfish, Pencil-streaked spinefoot Pencil-straeked rabbitfish, Pez conejo rayado, 大瓮篮子鱼,
Description
Épines dorsales (Total) : 13; Rayons mous dorsaux (Total) : 10; Épines anales : 7; Rayons mous anaux : 9; Rayons nageoires pectorales : 16-19; Rangées d'écailles au-dessus de la ligne latérale : 18-26; Hauteur du corps : 1.8-2.4 en SL, hauteur de la tête : 3.3-3.7 en SL; Angle pré-operculaire : 97°-110°. Taille maximum : 25.0 cm SL; Généralement : 20.0 cm TL. Profondeur : 2 - 15 m.
Couleur
Le corps est bleu sur le dessus, blanc argenté sur le dessous; une bande marron traverse le corps depuis la nuque en passant par l'oeil au menton, une autre part de la base des 4ème-5èmes épines dorsales jusque sous la nageoire pectorale.
Etymologie
Siganus : transformation en Latin du mot arabe, sijān = poisson lapin. Nom donné en référence à son museau semblable aux lapins.
doliatus : du Latin, dolia, dolium = tonne, tonneau large et renflé + du suffixe Latin, -atus = suffixe adjectival qui sert à construire des adjectifs sur une base nominale indiquant la possession d'une chose ou sa qualité. Ici le mot désigne des lignes transversales ou des cercles irréguliers colorés.
Description originale : Siganus doliatus Guérin-Méneville, 1829-38 - Localité type : côtes de l'île Buru ou Bourou, voisine de la Nouvelle-Guinée, Indonésie et île de Vanikoro, archipel des îles Santa Cruz, Sud-Ouest du Pacifique.
Distribution
Sud-Est de l'océan Indien, Océan Pacifique Ouest : Indonésie, à l'Est, Tonga, au Sud, du Nord de l'Australie et Nouvelle-Calédonie.
Biologie
Se rencontre parmi les récifs coralliens et les herbiers, le plus souvent en couples. Se nourrit d'algues. Les épines des nageoires dorsale, anale et ventrales sont dotées de glandes à venin.
Espèce ressemblante
Siganus virgatus (Valenciennes, 1835) - Présent dans l'Ouest de l'Indo-Pacifique : Inde, Myanmar (ex-Birmanie) et Sri Lanka, à l'Est, Philippines, au Nord, îles Ryukyu (Japon), au Sud, Nord de l'Australie. Apparemment s'hybride parfois avec Siganus doliatus dans la région Indo-Malaise.
Synonymes
Amphacanthus doliatus (Guérin-Méneville, 1829-38)
Teuthis doliata (Guérin-Méneville, 1829-38)
Teuthis doliatus (Guérin-Méneville, 1829-38)
---------------------------
Description
Dorsal spines (total): 13; Dorsal soft rays (total): 10; Anal spines: 7; Anal soft rays: 9; Scale rows above lateral line: 18-26. Body depth: 1.8-2.4, head 3.3-3.7 times in SL. Dorsal profile of head convex; Anterior nostril with a prominent rim or short tube, a little higher and pointed posteriorly. A forward-directed spine in front of dorsal fin, imbedded in nape; Fourth to eighth dorsal-fin spine longest: 1.1-1.4 times the length of last dorsal-fin spine; Longest anal-fin spine typically the last, but subequal to second to fourth anal-fin spines which may be occasionally fractionally longer; Soft parts of dorsal and anal fins moderately high, longest dorsal-fin ray: 1-1.4 times the longest dorsal-fin spine; Caudal fin emarginate in juveniles to moderately forked in adults. Scales minute; Cheeks fully covered with strong scales. Max. length: 25.0 cm SL; Common length: 20.0 cm TL. Depth range: 1 - 15 m.
Color
Body blue above to silvery white below, decorated with about 30 yellow bar, variously joined below base of dorsal fin but free ends tapering away just above midventral line of body. A seal brown band diagonally from nape through eye to ocular, another from base of 4th to 5th dorsal spines to just below base of pectoral fin. Below eye, ocular band usually containing a pair of dark blue line running from orbit to corner of mouth. At death the brown color of the ocular and shoulder band fades, but the yellow areas contained within the bands become dark orange-brown which is much darker than other yellow markings of head and sides.
Etymology
Siganus: Latin transformation of the Arabic word, sijān = a fish, rabbit fish. Referring to the similarity of the nose.
doliatus: from Latin, dolia, dolium = a wide and rounded + from Latin suffix, -atus = used to form adjectives from nouns indicating the possession of a thing or a quality.
Original description: Siganus doliatus Guérin-Méneville, 1829-38 - Type locality: coast of Buru Island, near New Guinea, Indonesia; Vanikoro Island, Santa Cruz Islands, southwestern Pacific.
Distribution
Southeastern Indian Ocean, western Pacific: Indonesia east to Tonga, south to northern Australia and New Caledonia.
Biology
Inhabits coral-rich areas of lagoons and seaward reefs. Juveniles form schools. Pairs form at 7 cm; But these pairs continue to form loose schools, sometimes with juvenile scarids, to feed in areas being flooded by the tide. At 20 cm, isolated pairs in deep water lagoons or on drop-offs at reef-edges feed on benthic seaweeds. Anterolateral glandular grooves with venom gland. Individuals mature at about two years of age. Individuals spawn in groups at dusk usually around the first quarter moon during warmer months.
Similar species
Siganus virgatus (Valenciennes, 1835) - Reported from Indo-West Pacific: India, Myanmar and Sri Lanka east to Philippines, north to Ryukyu Islands (Japan), south to northern Australia. Apparently hybridizes at times with Siganus doliatus in the Indo-Malayan region.