分類 / 名前
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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Geophaginae
Etymology: Geophagus: Greek, gea = the earth + Greek, phagein = to eat (Ref. 45335); pirangaensis: Name 'pirangaensis' from the type locality of the new species, Piranga River.
環境:環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: Brazil.
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm
Max length : 11.8 cm SL オス/雌雄の選別がない; (Ref. 138566)
簡単な記述
検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 14 - 15; 背鰭 (合計) : 10 - 11; 肛門の骨: 3; 臀鰭: 7 - 8; 脊つい: 28. This species is distinguished from its congeners by the following set of characters: presence of clear, rounded spots in the posterior most dorsal-fin rays of fixed adult specimens; snout 46.22%-52.74% HL; terminal mouth; head 94.08%-101.15% HL; caudal fin with a rounded distal margin; 25 or 26 longitudinal scales in the E0 series; dark and rounded mid-lateral spot of live specimens; 14 or 15 spines on the dorsal fin; small bright spots in the central region of the bluish spots on the caudal fin of living specimens absent; small bluish spots in the opercular region of living specimens; bluish dots on the most anterior soft rays of the anal fin of living specimens absent; denticles on gill rakers of the first branchial arch present; and bluish and longitudinal lines in the basal region of the caudal fin of living specimens absent (Ref.138566).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
This species occurs in backwaters and shallow areas 50-70 m wide, bordered by dense riparian forest and characterized by muddy, sandy, and rocky substrates (Ref. 138566).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Assis, C.E.D., J.A. Dergam, A.F. Cunha, V.N. Machado, T. Hrbek, N.M.D.F. Vicente, V.D. Queiroz and E. Henschel, 2026. A new endemic pearl cichlid of the 'Geophagus' brasiliensis (Cichliformes: Cichlidae) species group from the Piranga River, upper Doce River basin, southeastern Brazil. J. Fish Biol. 1-14. (Ref. 138566)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
水産業: 興味がない
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.02042 (0.00914 - 0.04559), b=3.02 (2.84 - 3.20), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
栄養段階 (参照 69278) |
2.4 ±0.1 se; based on size and trophs of closest relatives |
回復力 (参照 120179) |
高い, 15か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.). |
漁業の脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |