Diagnostic Description
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Inglês
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fornecido por Fishbase
This species is distinguished by the following characters: robust body; usually with 16 pectoral-fin rays; 25-29 longitudinal scales; 16 circumpeduncular scales; weakly ctenoid scales; adults with longer snout than eye diameter, shorter in juvenile; poorly developed adipose eyelid, forming narrow rim around eye; weak notch on anteroventral edge of preorbital; truncate caudal fin. Colour olive-brown dorsally, flanks and belly silvery to whitish; about 6 brownish stripes on flank formed by longitudinal marks on scales; fins yellowish white with dusky margins except caudal fin yellow and pectoral black dorsally and yellow ventrally (completely black in young) No axillary scale visible in the pectoral fins (Ref. 9812, 90102).
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Migration
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fornecido por Fishbase
Catadromous. Migrating from freshwater to the sea to spawn, e.g., European eels. Subdivision of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.
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- Estelita Emily Capuli
Morphology
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Dorsal spines (total): 4; Dorsal soft rays (total): 9 - 10; Analspines: 3; Analsoft rays: 7 - 9
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Trophic Strategy
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fornecido por Fishbase
Inhabits coastal waters (Ref. 9137) and coral reefs (Ref. 58534). Usually within tidal influence, but may enter fresh water, ascending 10 km into rivers (Ref. 40488). Form large schools, frequently in mangrove areas (Ref. 2334). Juveniles may be found in rice fields and mangroves (Ref. 9812).
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Biology
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Inhabit lagoons, reef flats, estuaries, and coastal creeks, in shallow coastal areas and protected sandy shores (Ref. 40488). Usually within tidal influence, but may enter fresh water, ascending 10 km into rivers (Ref. 40488). Form large schools, frequently in mangrove areas (Ref. 2334). Juveniles may be found in rice fields and mangroves and may be used as bait fish (Ref. 9812). Oviparous, eggs are pelagic and non-adhesive (Ref. 205). Feeds on phytoplankton, small algae and detritus organisms (Ref. 89972). Caught in cast nets, stakenets, beach seines, and gill nets; marketed fresh and salted; boiled (Thailand), canned or frozen (Australia). Roe also marketed salted and juveniles used as bait fish (Ref. 9812)..
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Importance
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fornecido por Fishbase
fisheries: commercial; aquaculture: commercial; aquarium: commercial; bait: occasionally
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分布
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Inglês
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fornecido por The Fish Database of Taiwan
分布於印度-太平洋區水域,由紅海、東非洲至土木土群島,北至日本南部,南至澳洲。臺灣北部及西部有分布。
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利用
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fornecido por The Fish Database of Taiwan
漁期全年皆有,主要為沿岸流刺網或待袋網等法捕獲,但產量不多,且因本種魚體型較小,又沒有烏魚有飽滿的卵,故經濟價值不像烏魚來的高,魚肉適合煮湯或紅燒皆不錯。
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描述
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fornecido por The Fish Database of Taiwan
體延長呈紡綞形,前部圓形而後部側扁,背無隆脊。頭短,圓筒形。吻短;唇薄,下唇有一高聳的小丘和一列絨毛狀唇齒,上唇有1-2列細唇齒。
眼圓,前側位;脂眼瞼不發達。口小,亞腹位;上頜骨末端彎曲向下且寬大略呈方形,末端遠於口角後緣;牙細弱或絨毛狀。鼻孔每側各一對。在稚魚期為圓鱗,隨著成長而變為具有多列錐型櫛刺的櫛鱗;頭部及體側的側線發達;側線數目8-10條;側線鱗25-29。鰓耙繁密細長,第一鰓弓下枝鰓耙40-67。背鰭兩個,第一背鰭硬棘IV,第二背鰭鰭條I,8;胸鰭上側位,具16鰭條,基部無藍斑駁或黑點,腋鱗發育不良或缺如;腹鰭腹位,具鰭條I,5,腋鱗發達;臀鰭具鰭條III,8;尾鰭幾近截平。幽門垂數可達23條。新鮮標本體背橄欖綠,體側銀白色或略黃,腹部漸次轉為白色;體側或有約6條由暗色鱗片組成之縱帶。除腹鰭為白色外,各鰭為淡黃色而帶暗色緣;有時尾鰭呈較深的黃色;幼魚胸鰭黑色。以前所記載之截尾鮻(/Liza
vaigiensis/)為本種之同種異名。
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棲地
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fornecido por The Fish Database of Taiwan
主要棲息於沿岸砂泥底質地形的海域,而河口區或紅樹林等半淡鹹水海域亦常見其蹤跡,亦常侵入河川下游。以底泥中有機碎屑或水層中的浮游生物為食,群棲性,常成群洄游,幼魚在受到驚嚇時,會有躍離水面的動作。
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Squaretail mullet
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Inglês
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fornecido por wikipedia EN
The squaretail mullet (Ellochelon vaigiensis), also known as the diamondscale mullet, is a species of grey mullet from the family Mugilidae. It is an Indo-Pacific species and is the only species in the monospecific genus Ellochelon.[2]
Description
The squaretail mullet is olive-brown on its back with silvery flanks and a white or yellowish belly. It has six longitudinal stripes along its sides which are formed by darker longitudinal markings on the scales which also have darkened edges creating a slight chequered appearance on the flanks. The iris has yellow patches. The fins have dark margins which contrasts with their mainly yellowish cast but the caudal fin is obviously yellow and in smaller specimens the pectoral fin is totally black but the lower part becomes yellowish in older fish.[2]
Distribution
The squaretail mullet occurs from the Red Sea and the coast of East Africa, as far south as Mozambique, eastwards through the Indo-pacific to New Caledonia and the Great Barrier Reef and north to southern Japan.[1]
Habitat and biology
The squaretail mullet can be found in lagoons, estuaries, sheltered sandy shorelines and coastal creeks and can enter freshwater, having been found up to 10 kilometres (6.2 mi) up rivers, although they normally do not move further inland than the influence of the tides. They can form large aggregations among mangroves and the juveniles are frequently recorded in rice paddies and mangroves.[2] They feed on phytoplankton, algae and detritus. Spawning is at sea,[3] and the eggs are pelagic and do not adhere to aobjects.[2]
Human utilisation
The smaller fish are caught for use as bait fish.[2] It is also locally exploited as a food fish being marketed fresh; its roe is also sold and eaten. It is fished for using beach seines, gillnets, cast nets and stake nets.[1]
References
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Squaretail mullet: Brief Summary
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Inglês
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fornecido por wikipedia EN
The squaretail mullet (Ellochelon vaigiensis), also known as the diamondscale mullet, is a species of grey mullet from the family Mugilidae. It is an Indo-Pacific species and is the only species in the monospecific genus Ellochelon.
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