Johnius pacificus Hardenberg, 1941

Pacific croaker
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Johnius pacificus   AquaMaps   Data sources: GBIF OBIS
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Johnius pacificus
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drawing shows typical fish in this Family.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 辐鳍鱼纲 (条鳍鱼) > Perciformes (Perch-likes) 鱸形目 (Perch-likes) > Sciaenidae (Drums or croakers) 石首魚科 (Drums or croakers)

Environment: milieu / climate zone / depth range / distribution range 生态学

; 海洋; 淡水; 半咸淡水 底中水层性.   熱帶

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Western Central Pacific: northern (=Pacific) coasts of New Guinea.
中西太平洋: 新幾內亞的海岸北部。

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 14.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 9772); common length : 10.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 9772)

简单描述 型态特徵 | 形态测量图

背棘 (总数): 11; 背的软条 (总数): 25-29; 臀棘 2; 臀鳍软条: 7. Eye small, 11 to 16 % of head length; snout bluntly rounded; no barbel on chin; teeth differentiated into large and small in both jaws; gill rakers slender, about half the length of gill filaments at angle of arch, 10 to 13 on lower limb. Second anal spine long, stiff, 45 to 54 % of head length. Scales on head and throat cycloid (smooth). Swim bladder hammer-shaped, with about 12 pairs of arborescent appendages along its sides, the first entering head and sending a palmate branch to the front of the pectoral arch. Sagitta (large earstone) with a tadpole-shaped impression, the head of which has its long axis lying obliquely to that of sagitta and the tail expanded and deepened as a hallow cone connected with the head by a narrow groove.
眼小的,11 到 16% 头长; 吻钝地圆的; 没有在下巴上的触须; 齿分化成大而小的双颚内; 鳃耙细长的, 大约一半鳃丝的长度在突出部位上弓,10 到 13 在下肢上。 第二臀鳍棘长的, 硬,45 到 54% 头长。 在头部与咽喉上的鳞片圆形的.(平滑的) 泳鳔锤型, 有大约 12 对树枝状的附肢沿着进入头部而且送胸弓的手掌形分支到前面的它的侧边,第一个。 矢耳石 (大的 earstone) 具有一个蝌蚪-形状的印象, 头那一个有它的矢耳石与尾部斜向到那的长轴扩大而且加深作为一个与一个狭窄凹槽的头部相连的圣锥体。

生物学特性     字汇 (例如 epibenthic)

Inhabits estuaries and rivers (Ref. 9772).

栖息于河口与河。 (参考文献 9772)

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼

中西太平洋: 新幾內亞的海岸北部。

主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

Sasaki, K., 2001. Sciaenidae. Croakers (drums). p.3117-3174. In K.E. Carpenter and V.H. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 5. Bony fishes part 3 (Menidae to Pomacentridae). Rome, FAO. pp. 2791-3380. (Ref. 9772)

世界自然保护联盟红皮书 (Ref. 119314)

  不评价 

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的





人类利用

渔业: 没有兴趣
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网络资源

Aquatic Commons | BHL | Cloffa | Websites from users | 核实 FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(基因组, 核苷酸) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | SeaLifeBase | 树状分类阶层 | Wikipedia(转至, 搜寻) | World Records Freshwater Fishing | Zoobank | 动物学的记录

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 28.3 - 29, mean 28.8 (based on 52 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00473 - 0.02021), b=3.07 (2.91 - 3.23), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
营养阶层 (Ref. 69278):  3.4   ±0.5 se; Based on size and trophs of closest relatives
回复力 (Ref. 69278):  高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
脆弱性 (Ref. 59153):  Low vulnerability (15 of 100) .