Classification / Names
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Perciformes/Percoidei (Perchs) >
Percidae (Perches) > Percinae
Etymology: Gymnocephalus: Greek, gymnos = naked + Greek, kephale = head (Ref. 45335); ambriaelacus: The specific name name is the Latin translation "of the lake of the Ammer region", "ambriae" being the genitive of the latinized Celtic word for Ammer region, i. e. ambro, and "lacus" being the genitive of lacus, the Latin word for lake. Lake Ammersee is known historically as "Ambriae Lacus" (Graesse 1909). A noun
in apposition.
Environment: milieu / climate zone / rango de profundidad / distribution range
Ecología
; agua dulce bentopelágico. Temperate
Europe: endemic to Lake Ammersee, upper Danube basin in southern Germany.
Tamaño / Peso / Age
Madurez: Lm ? range ? - ? cm
Max length : 11.7 cm SL macho / no sexado; (Ref. 84545)
Short description
Claves de identificación | Morfología | Morfometría
Espinas dorsales (total) : 14 - 16; Radios blandos dorsales (total) : 10 - 12; Espinas anales: 2; Radios blandos anales: 5 - 6. Distinguished from Gymnocephalus cernua by having smaller angle between the posterior dorsal fin margin and the caudal peduncle (90-110° vs. 113-154°), larger eye diameter (10.2-12.3 % SL vs. 7.9-10.5 % SL) and an irregular pattern of large dorsolateral dark blotches vs. a pattern of small dots. Differs from Gymnocephalus cernua by having a deeper body (26.1-33.6 % SL vs. 20.1-30.7 % SL), longer base of the spinous part of the dorsal fin (36.1-41.9 % SL vs. 28.8-39.6 % SL) and higher mean and modal number of dorsal fin spines (modal 15 vs 14). Diagnosed from Gymnocephalus baloni by the combination of the following characters: larger eye diameter (10.2-12.3 % SL vs. 8.2-10.5 % SL), smaller caudal peduncle depth (7.7-8.9 % SL vs. 7.4-10.1 % SL), higher mean and modal number of pectoral fin rays (15 vs. 13) and a steeper convex dorsal profile of the snout (Ref. 84545).
Body shape (shape guide): fusiform / normal.
Ripe females were collected in shallow water between 3-5 m depth in May and spawned immediately in captivity (Ref. 84545). Eggs, measuring ~1 mm in diameter, were observed on the bottom and were only weakly adhesive, but some of them were floating (Ref. 84545).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Geiger, M.F. and U.K. Schliewen, 2010. Gymnocephalus ambriaelacus, a new species of ruffe from Lake Ammersee, southern Germany (Teleostei, Perciformes, Percidae). Spixiana 33(1):119-137. (Ref. 84545)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Referencia
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01047 (0.00465 - 0.02359), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Referencia
69278): 3.4 ±0.4 se; based on size and trophs of closest relatives
Resiliencia (Referencia
120179): Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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