Issue
Junior synonym Cottus jaxartensis is a valid species according to Sideleva, 2021 (Ref. 129291) and Cottus nudus is a primary homonyn and permanently invalid (include in Ref. 129291 Quote).
Environment: milieu / climate zone / depth range / distribution range
экология
; пресноводный; солоноватоводный демерсальный; pH range: 7.0 - 7.5; dH range: 10 - ?; мигрирует в реке (Ref. 51243); пределы глубины 2 - 2 m (Ref. 58018). Subtropical; 1°C - 16°C (Ref. 45166); 70°N - 40°N, 6°W - 60°E
Europe: North Baltic in Scandinavia south to stream Maurine in southwesternmost of corner of Baltic basin (Germany); lower reaches of streams and rivers and along coast of Sweden, Finland, Russia southwest to Estonia; Danube (except upper tributaries Save and Arges), Elbe, Ems, Weser and Rhône drainages; tributaries of upper Rhine downriver (northward) to about Mannheim; a few of uppermost tributaries of River Tevere, central Italy; Adriatic drainages from Potenza in Italy to Zrmanja in Croatia, except Timavo spring. Locally introduced in Scheldt drainage in Belgium.
Length at first maturity / Size / Вес / Возраст
Maturity: Lm 4.2 range ? - ? cm
Max length : 18.0 cm TL самец/пол неопределен; (Ref. 556); common length : 10.0 cm TL самец/пол неопределен; (Ref. 556); наибольший возраст (опубликованны данные): 10 годы (Ref. 74370)
колючие лучи спинного плавника (общее число) : 6 - 8; членистые (мягкие) лучи спинного плавника (общее число) : 15 - 18; колючие лучи анального плавника: 0; членистые (мягкие) лучи анального плавника: 10 - 13; позвонки: 31 - 34. Caudal fin with 13 to 14 rays (Ref. 40476).
Occurs in cold, clear and fast-flowing water of small stream to medium-sized rivers as well as on gravel or rocky shores of cold lakes and in slightly brackish waters along eastern coast of Baltic coast (Ref. 59043). Feeds on small bottom invertebrates, mainly insects, crustaceans. Pink to yellow eggs are found in clumps attached to undersides of large stones (Ref. 41678). Contrary to statements in older literature, eggs and larvae of fishes are not a common food item (Ref. 45167).
Spawns once a year for several years in low productivity streams, but exhibits multiple spawning within a season in high productivity environments (Ref. 40290, 40754). Male protects several batches of eggs--deposited below a stone--for about 3 weeks. Larvae are not guarded and may occasionally been eaten (Ref. 45166). Also Ref. 26506.
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)
Статус Красного Списка МСОП (Ref. 130435: Version 2024-1)
Угроза для людей
Harmless
Использование человеком
рыболовство: интереса не представляет; наживка: occasionally
дополнительная информация
инструменты
Специальные отчеты
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ресурсы в Интернет
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00553 - 0.01575), b=3.18 (3.03 - 3.33), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 3.2 ±0.2 se; based on diet studies.
устойчивость к внешним воздействиям (Ref.
120179): средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (tm=1-3).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
