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> Carangaria/misc (Various families in series Carangaria) > Polynemidae (Threadfins)
Etymology: Polydactylus:Greek, poly = a lot of + greek, daktylos = finger (Ref. 45335). More on author: Valenciennes.
Окружающая среда: среда / климатическая зона / пределы глубины / диапазон распространения экология
морской; пресноводный; солоноватоводный ассоциированный с рифами; пределы глубины 1 - 50 m (Ref. 57343), usually 20 - 50 m (Ref. 9685). Tropical; 34°N - 23°S, 50°E - 148°W (Ref. 57343)
Indo-Pacific: mainly around oceanic islands. Known from Mauritius, Seychelles, Kenya and many islands of the northern Indian Ocean; then from Indonesia north to the Ryukyu, Ogasawara and Yaeyama islands and east to the Hawaiian Islands, French Polynesia and Pitcairn. Has not been collected in Australia (Ref. 57343).
Размер / Вес / Возраст
половая зрелость: Lm? range ? - ? cm Max length : 61.0 cm TL самец/пол неопределен; (Ref. 4887); наибольший вес (опубликованные данные): 3.2 kg (Ref. 4699)
колючие лучи спинного плавника (общее число) : 9; членистые (мягкие) лучи спинного плавника (общее число) : 13; колючие лучи анального плавника: 3; членистые (мягкие) лучи анального плавника: 11. Body uniformly golden silver; occasionally with several faint dark stripes along longitudinal scale rows above and below lateral line. Pectoral filaments 6 with tip of uppermost filament reaching to or slightly beyond level of posterior tip of upper part of pectoral fin (Ref. 41110). Body shape (shape guide): short and / or deep; Cross section: compressed.
This schooling species occurs along sandy and rocky shorelines and over sandy lagoon bottoms, often in zones of turbulence (Ref. 9685). Benthopelagic (Ref. 58302). Often encountered in river mouths or brackish mangrove estuaries. Feeds mainly on crustaceans (shrimps and crabs), polychaete worms, other benthic invertebrates; also on teleosts (Ref. 9685). A lunar spawning rhythm occurs close to shore (Ref. 9685). Sexual maturity in males occurs at 12 to 15 cm (Ref. 9685). Subsequently undergoes sex reversal passing through a hermaphroditic stage, and become female between 18 and 24 cm (Ref. 9685). The potential of this species for aquaculture has been studied (Ref. 9685).
Жизненный цикл и брачное поведение половая зрелость | размножение | нерест | икра | Плодовитость | личинки
Motomura, H., 2004. Threadfins of the world (Family Polynemidae). An annotated and illustrated catalogue of polynemid species known to date. FAO Spec. Cat. Fish. Purp. Rome: FAO. 3:117 p. (Ref. 57343)
Статус Красного Списка МСОП (Ref. 130435: Version 2025-2)
Физиология Состав тела Питательные вещества Потребление кислорода Тип плавания Скорость плавания Зрительные пигменты Звук рыбы Болезни и паразиты Токсичность (LC50s)
Предпочтительная температура (ссылка 123201): 24.1 - 29, mean 27.9 °C (based on 1038 cells).
Индекс филогенетического разнообразия (ссылка 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01820 (0.01035 - 0.03199), b=3.11 (2.96 - 3.26), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Трофический уровень (ссылка 69278): 3.4 ±0.49 se; based on food items.
устойчивость к внешним воздействиям (ссылка 120179): средний (среднего размера), минимальное время удвоения популяции 1.4-4.4 года (Preliminary K or Fecundity.).
