dcsimg

Trophic Strategy

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Occurs in highly turbid waters (Ref. 43081).
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Susan M. Luna
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Morphology

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Dorsal spines (total): 10; Dorsal soft rays (total): 13 - 14; Analspines: 3; Analsoft rays: 8
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Diagnostic Description

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Dorsal profile of head steeply sloped. Preorbital width equal to eye diameter or larger. Preopercular notch and knob poorly developed. Scale rows on back parallel to lateral line. Center of each scale often with a reddish-brown spot, giving an overall appearance of series of horizontal lines on side of body. Generally yellow with a bronze to silvery sheen, shading to silvery white on belly and underside of the head. A large black blotch mainly above the lateral line below the anterior dorsal-fin rays.
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Diseases and Parasites

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Baldness disease in Snapper. Parasitic infestations (protozoa, worms, etc.)
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Recorder
Allan Palacio
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Diseases and Parasites

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Haliotrema Infection 2. Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites

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Haliotrema Infection 1. Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites

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Trichodinosis. Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites

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Vibriosis Disease (general). Bacterial diseases
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Migration

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Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.
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Susan M. Luna
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Biology

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Adults probably frequent coral reef areas; juveniles found in mangrove estuaries (Ref. 30573). Feed on fishes and benthic invertebrates including shrimps, crabs and cephalopods. In Hong Kong live fish markets (Ref. 27253).
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Importance

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fisheries: commercial; aquaculture: commercial; gamefish: yes
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分布

provided by The Fish Database of Taiwan
分布於印度-西太平洋區。西起非洲東起,東至斐濟群島,南自澳洲,北迄琉球群島。台灣南部及西部海域均有產。
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臺灣魚類資料庫
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利用

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一般以一支釣、流刺網等漁法捕獲。煎食或紅燒皆宜。
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描述

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體長橢圓形,背緣和腹緣圓鈍,背緣稍呈弧狀彎曲。兩眼間隔平坦。上頜兩側具細尖齒,排列疏鬆,前端具犬齒2顆;下頜為疏鬆尖錐齒,前端無犬齒;鋤骨齒帶三角形,其後方無突出部;腭骨亦具絨毛狀齒;舌面無齒。體被中大櫛鱗,頰部及鰓蓋具多列鱗;背鰭、臀鰭和尾鰭基部大部分亦被細鱗;側線完全,側線鱗列數42-43;側線上方的鱗片排列自始至終與側線平行,側線下方亦然。背鰭軟硬鰭條部間無顯著深刻;臀鰭基底短而與背鰭軟條部相對;背鰭硬棘X,軟條13-14;臀鰭硬棘III,軟條8;胸鰭長而略等於頭長;尾鰭近截形,微凹。體背灰褐色,體側黃色,腹部銀白。體側鱗片中央具一小黑點,各黑點相連成點帶而與側線平行;體側在背鰭軟條部起點的下方具一大黑斑,黑斑2/3為側線上方。各鰭黃色。
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棲地

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棲息於沿岸礁區,水深1-80公尺處。幼魚有時可發現於紅樹林區、河口。主要攝食蟹類、蝦類及其它底棲甲殼類。
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Lutjanus johnii

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Lutjanus johnii, John's snapper, the golden snapper, big-scaled bream, fingermark bream, fingermark seaperch, John's sea-perch, or spotted-scale sea perch, is a species of marine ray-finned fish, a snapper belonging to the family Lutjanidae. It is native to the western Pacific and Indian Oceans.

Taxonomy

Lutjanus johnii was first formally described in 1792 as Anthias johnii by the German naturalist Marcus Elieser Bloch with the type locality given as Surat where the Tapti River estuary meets the Gulf of Khambhat in the Arabian Sea.[3] The specific name, johnii, honours the German naturalist Christoph Samuel John (1747–1813), who was a missionary in India from 1771 until his death and who collected specimens for Bloch at the Danish colony of Tranquebar.[4]

Description

Hamilton 38 (cropped).jpg

Lutjanus johnii has a moderatel deep body in which its standard length is 2,4 to 2.9 its depth at the deepest point. It has a steeply sloped forehead and the incision and know on the preoperculum are weakly developed The vomerine teeth are arranged in a crescent shaped patch with no rearwards extension although there is a patch of granular teeth on the tongue.[5] The dorsal fin has 10 spines and 13-14 soft rays while the anal fin has 3 spines and 8 soft rays.[2] The soft part of the dorsal fin and the anal fin have a rounded shape. The pectoral fins have 16 or 17 rays and the caudal fin is truncate or weakly emarginate.[5] This fish attains a maximum total length of 97 cm (38 in), although 50 cm (20 in) is more typical, and the maximum published weight is 10.5 kg (23 lb).[2] The overall colour is yellow, with a sheen of bronze or silvery, becoming silvery-white on the abdomen. There is a rusty spot at the centre of each scale creating the appearance of horizontal lines along the flanks. There is a sizeable black blotch below the front of the soft rayed part of the dorsal fin which is mostly above the lateral line,[2] although this may be absent in adults.[5]

Distribution and habitat

Lutjanus johnii has a wide Indo-Pacific distribution. It occurs from the eastern African coast where it ranges from the southern Red Sea to South Africa, across the Indian Ocean into the Pacific as far as Fiji. It is found as far north as the Ryukyu Islands of southern Japan and south to northern Australia. It has a depth range of 0.1 to 80 m (3.9 in to 262 ft 5.6 in).[1] The adult fish are thought to be inhabitants of coral reefs while the juveniles use the shelter of mangroves.[2]

Biology

Lutjanus johnii is a predatory species which preys on fishes and benthic invertebrates such as crustaceans and cephalopods. Spawning has been observed during September in the Andaman Sea. It is more numerous over deep reefs than it is over reefs in shallower waters. In Australian waters L. johnii is one of the dominant, large snappers in the nearshore fish fauna of reefs. The large adults school in turbid waters around hard substrates in silty and sandy coastal and offshore areas.[1]

Fisheries

Lutjanus johnii is frequently recorded in markets throughout its range and is caught using handlines, bottom longlines, traps and bottom trawls. The catch is sold fresh or dried salted.[1] it is a popular game fish for recreational anglers in Australia.[6]

References

  1. ^ a b c d Russell, B.; Smith-Vaniz, W.F.; Lawrence, A.; Carpenter, K.E. (2016). "Lutjanus johnii". IUCN Red List of Threatened Species. 2016: e.T172495A1343500. doi:10.2305/IUCN.UK.2016-3.RLTS.T172495A1343500.en. Retrieved 20 November 2021.
  2. ^ a b c d e Froese, Rainer; Pauly, Daniel (eds.) (2021). "Lutjanus johnii" in FishBase. February 2021 version.
  3. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Lutjanus". Catalog of Fishes. California Academy of Sciences. Retrieved 15 June 2021.
  4. ^ Christopher Scharpf and Kenneth J. Lazara, eds. (5 January 2021). "Order LUTJANIFORMES: Families HAEMULIDAE and LUTJANIDAE". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 12 June 2021.
  5. ^ a b c Gerald R. Allen (1985). FAO species catalogue Vol.6. Snappers of the world An annotated and illustrated catalogue of lutjanid species known to date (PDF). FAO Rome. pp. 94–95. ISBN 92-5-102321-2.
  6. ^ "Fingermark". Fishing Cairns. Retrieved 15 June 2021.

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Lutjanus johnii: Brief Summary

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Lutjanus johnii, John's snapper, the golden snapper, big-scaled bream, fingermark bream, fingermark seaperch, John's sea-perch, or spotted-scale sea perch, is a species of marine ray-finned fish, a snapper belonging to the family Lutjanidae. It is native to the western Pacific and Indian Oceans.

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Description

provided by World Register of Marine Species
Adults probably frequent coral reef areas. Juveniles found in mangrove estuaries. Feeds on fishes and benthic invertebrates including shrimps, crabs and cephalopods.

Reference

Froese, R. & D. Pauly (Editors). (2023). FishBase. World Wide Web electronic publication. version (02/2023).

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