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Plecoglossus altivelis (Temminck & Schlegel, 1846)

Ayu sweetfish
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Image of Plecoglossus altivelis (Ayu sweetfish)
Plecoglossus altivelis
Picture by Islam, Md. S.

Классификация / Names народные названия | синонимы | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

лучеперые рыбы > Osmeriformes (Smelts) > Plecoglossidae (Ayu fish)
Etymology: Plecoglossus: Greek, pleko, plekein = to fold + Greek, glossa = tongue (Ref. 45335).  More on authors: Temminck & Schlegel.

Issue
All subspecies of Plecoglossus altivelis (Temminck & Schlegel, 1846) are synonymised under the species in Eschmeyer (CofF ver. Jul. 2010: Ref. 84883). Please send references, or more studies are needed.

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

; морской; пресноводный; солоноватоводный демерсальный; амфидромный (Ref. 51243); пределы глубины 10 - ? m.   Subtropical; 44°N - 23°N

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | Faunafri

Northwest Pacific: western Hokkaido in Japan southward to the Korean Peninsula, Taiwan and China.

Length at first maturity / Size / Вес / Возраст

Maturity: Lm 20.0, range 30 - 40 cm
Max length : 70.0 cm TL самец/пол неопределен; (Ref. 12218); common length : 15.0 cm SL самец/пол неопределен; (Ref. 35840); наибольший возраст (опубликованны данные): 3 годы (Ref. 12218)

Краткое описание морфология | морфометрия

колючие лучи спинного плавника (общее число): 0; членистые (мягкие) лучи спинного плавника (общее число): 10-11; членистые (мягкие) лучи анального плавника: 14 - 15; позвонки: 60 - 63. Pyloric caeca 350-400.

биология     глоссарий (например epibenthic)

Typical amphidromous fish; appears in near shore from late autumn to spring (Ref. 11230). Found in lakes and rivers, preferring clean river water and can be found the entire river long, from the head to the mouth (Ref. 12218). Ascends the river during March when the temperature is around 10°C (Ref. 12218). Adults spawn in the spring, in the lower reaches of rivers. After spawning, some adults die while others return to the sea. Larvae enter the sea immediately after hatching and remain there during winter, feeding on plankton. In springtime, the young (5-7 cm TL) move upstream to the middle reaches of rivers to feed on algae. Fish (about 6-9 cm) start schooling at the river mouth and are insectivores and eat algae off small pebbles (Ref. 12218); this is assisted by small leaf-like teeth which are loosely attached to the jaw with two ligaments (Ref. 45181). Those that are ready to spawn (about 20 cm TL) move downstream to the lower reaches of the river. Spawning adults from the sea migrate upstream to the lower reaches as well. Some fish spawn two or three years in succession, others only once (Ref. 9987 & 559). River forms live usually only one year whereas lake forms can live two or three years (Ref. 12218). Reaches maturity at 30-40 cm (Ref. 12218). Highly esteemed food fish. Marketed fresh and consumed fresh, fried and broiled (Ref. 9987).

Life cycle and mating behavior половая зрелость | размножение | нерест | икра | Fecundity | личинки

During spawning some fish go up the river and some fish spawn on the river shoreline above pebbles. Spawns at night and excavates a 10cm (diameter or depth?) pit. Eggs are around 1 mm in size and adhere to the sand or pebbles for 14 to 20 days before hatching. This fish is semelparous and releases eggs many times over a short period each time releasing ~10,000 eggs. Sometimes females that want to spawn but cannot, save their strength, and go to a deep stagnant pool. These females wait until spring before going up the river with young fish. After hatching, the larvae are 6 mm and flow with the water current eating plankton. Juvenile fish will come again to the river in spring. These live in schools. When schools of Plecoglossus altivelis return to their river they guard their territory and eat food (Ref. 12218). Reproductive mode varies between semelparity and iteroparity. Large females spawn once, while smaller females spawn twice during a two-week interval (Ref. 76896).

Основная ссылка Upload your references | ссылки | координатор | соавторы

Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text). (Ref. 559)

Статус Красного Списка МСОП (Ref. 119314)

  Нехватка данных (DD) ; Date assessed: 03 September 2010

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

  Harmless





Использование человеком

рыболовство: важный объект промысла; аквакультура (рыбоводство): коммерческий; объект спортивного рыболовства: да
FAO(аквакультура (рыбоводство): production; рыболовство: production, Видовой профиль; publication : search) | FishSource | Sea Around Us

дополнительная информация

народные названия
синонимы
обмен веществ
хищники
экотоксикология
размножение
половая зрелость
нерест
Spawning aggregation
Fecundity
икра
Развитие икры
ссылки
аквакультура (рыбоводство)
особенности рыбоводства
степень растяжения
генетика
частоты аллелей
наследуемость
болезни
обработка
Mass conversion
соавторы
изображения
Stamps, Coins Misc.
звуки
Ciguatera
скорость
тип плавания
жаберная область
Otoliths
мозг
зрение

инструменты

Специальные отчеты

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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 13 - 22.6, mean 19.7 (based on 42 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 1.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00427 (0.00168 - 0.01086), b=3.06 (2.84 - 3.28), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.8   ±0.16 se; Based on food items.
устойчивость к внешним воздействиям (Ref. 69278):  высокий, минимальное время удвоения популяции до 15 месяцев (tm=1; tmax=3; Fec=50,000-100,000).
Уязвимость (Ref. 59153):  Low to moderate vulnerability (30 of 100) .
Категория цены (Ref. 80766):   Unknown.