رده بندی / Names
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Cichliformes (Cichlids, convict blennies) >
Cichlidae (Cichlids) > Cichlasomatinae
Etymology: Krobia: Vernacular name of different fishes in Surinam (Ref. 45335); petitella: Named from the Latin petitus, reaching out for or inclining towards, in reference to the lateral band spots lying adjacent to the upper lateral line anteriorly and intercepting posteriorly. An adjective in feminine form.
Environment: milieu / climate zone / depth range / distribution range
بوم شناسي
; آب شيرين موجوداتی که در محدوده وسیعی از آبهای آزاد از نزدیک بستر و یا روی کف بستر، در قسمت های میان آبی تا سطح آب و در برخی گونه ها با قابلیت پرواز، زندگی و تغذیه می کنند.; pH range: 4.2 - 7.1. Tropical; 25°C - 33°C (Ref. 93940)
South America: Berbice River drainage in Guyana.
Size / Weight / سن
Maturity: Lm ? range ? - ? cm
Max length : 10.2 cm SL جنس نر / بدون خواص جنسي; (Ref. 93940)
توصيف مختصر
كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
خارهاي باله پشتي (کل) : 12 - 14; شعاع نرم باله پشتي (کل) : 9 - 11; خارهاي باله مخرجي: 3; شعاع نرم باله مخرجي: 7 - 8; مهره ها: 24 - 25. This species differs from all its congeners (Krobia guianensis Regan, K. itanyi Puyo and K. xinguensis Kullander) as well as the closely related ‘Aequidens’ potaroensis and ‘A’. paloemeuensis by tubed scales of the upper lateral line extending caudally into a line bisecting the lateral band blotches posterior to the mid-lateral spot. It can be further distinguished by the anterior lateral band spots lying immediately ventral to the upper lateral line, instead of being separated from the upper lateral line by a complete row of scales in all other species. It also possesses a unique lateral coloration pattern formed by the combination of six vertical bars and four lateral band spots (vs. 5 bars/3 or 4 spots in K. itanyi, 5/5 in K. guianensis, 7/6 in K. xinguensis, 6/6 in ‘Aequidens’ potaroensis, 5/5 in ‘A’. paloemeuensis). It can be further diagnosed by the combination of the following characters: separation of the caudal spot on the dorsal caudal fin lobe from the lower lateral line by one scale length; lacking a lateral band spot in bar 2; presence of two distinct interorbital stripes and a prominent preorbital stripe; significantly longer snout and longer fins than K. guianensis on average; lateral band extending to the posterior base of the dorsal fin; and lacking anterolateral spots on the lower jaw and a lateral band blotch located in the second vertical bar as seen in K. xinguensis in addition to having a longer snout and shallower body than K. xinguensis on average. It differs from ‘Aequidens’ potaroensis and ‘A.’ paloemeuensis by lacking lateral band spots on the caudal peduncle; and from ‘A.’ potaroensis by having a significantly deeper head, body and caudal peduncle as well as longer fins on average (Ref. 93940).
Collected from a black water river with pH ranging from 4.2-7.1, conductivity of 2.0-39.0 μS , temperature of 25.0-33.3°C, current velocity typically ranging from 0.1-0.3 m/s, dissolved oxygen of 5.1-6.7 mg/L and Secchi depth 0.7-1.0 m (Ref. 93940).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)
Steele, S.E., E. Liverpool and H. López-Fernández, 2013. Krobia petitella, a new species of cichlid fish from the Berbice River in Guyama (Teleostei: Cichlidae). Zootaxa 3693(2):152-162. (Ref. 93940)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2024-2)
خطر برای انسان ها
Harmless
استفاده انسانی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02291 (0.01064 - 0.04934), b=3.07 (2.89 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
جهندگی (Ref.
120179): زياد, كمينه زمان لازم براي دو برابر شدن جمعيت ، كمتر از 15 ماه (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
