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Teleostei (teleosts) > Perciformes/Cottoidei (Sculpins) > Cottidae (Sculpins)
Etymology: Cottus: Greek, kottos = a fish (Ref. 45335); transsilvaniae: Named for Transsilvania, the Latin name of Transylvania.
More on authors: Freyhof, Kottelat & Nolte.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic. Temperate

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Europe: Danube basin in Romania. Found only in the upper river Arges. May occur in other tributaries of lower Danube.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 9.7 cm SL male/unsexed; (Ref. 55856)

Short description Identification keys | Morphology | Morphometrics

Anal soft rays: 12 - 13. Can be distinguished from other species of Cottus in the Danube drainage by the combination of the following characters: dorsal head length 19-20% SL; 12-13 1/2 anal-fin rays; 18-19 1/2 rays in second dorsal fin; predorsal length 29-30% SL; distance from tip of snout to origin of second dorsal fin 47-50% SL; no distinct transverse bands on pelvic fin; no prickling on body (Ref. 55856).

Recorded from a cold and fast-flowing stream (Ref. 59043).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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Freyhof, J., M. Kottelat and A. Nolte, 2005. Taxonomic diversity of European Cottus with description of eight new species (Teleostei: Cottidae). Ichthyol. Explor. Freshwat. 16(2):107-172. (Ref. 55856)

IUCN Red List Status (Ref. 130435: Version 2024-2)

Endangered (EN) (B1ab(iii)); Date assessed: 14 July 2023

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00955 (0.00344 - 0.02648), b=3.09 (2.85 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Cottus transsilvaniae Freyhof, Kottelat & Nolte, 2005