Bivalvia |
Pectinida |
Pectinidae
Environment: milieu / climate zone / пределы глубины / distribution range
экология
; пределы глубины 0 - 80 m (ссылка 348), usually 0 - 30 m (ссылка 348). Tropical
Indo-West Pacific.
Length at first maturity / Size / Weight / Возраст
половая зрелость: Lm ? range ? - ? cm Max length : 14.0 cm ShL самец/пол неопределен; (ссылка 348); common length : 11.0 cm SL самец/пол неопределен; (ссылка 348)
Shell thin, medium to large sized (commonly exceeding to 10 cm in length), laterally compressed, almost circular in outline, gaping anteriorly and posteriorly. Both valves somewhat convex, the right (lower) valve only a little more inflated and larger than the left (upper) valve. Ears small, subequal in size and shape, with the right anterior ear faintly sinuated at anteroventral margin and devoid of ctenolium. Surface of left valve with 2 broad and very shallow depressed areas radiating from the umbo to anteroventral and radial lines. Interior of both valves with distinct radial ribs, usually in pairs, much narrower than the flat interspaces and becoming obsolete on umbonal area. Right valve with 42 to 54 internal radial ribs (46 to 54 in the typical subspecies A. japonicum, and 42 to 48 in the southern A. japonicum balloti). Colour: outside of left valve reddish brown, with variable shades along the concentric growth marks; outer colour pattern of subspecies balloti also with small, yellowish and dark brown spots along radial lines on umbonal area and often with a few irregular, larger dark spots towards periphery. Interior of left valve glossy to pale yellow externally and internally; subspecies balloti with an additional external brown scattering along some concentric growth marks.
On sandy to muddy bottoms of lagoons, often associated with brown seaweeds. Sublittoral mainly from shallow waters to about 30 m, but also deeper to more than 80 m. Can actively swim by clapping the valves when disturbed, with a speed of about 2 knots and for a distance of some 10 m (Ref. 348).
Life cycle and mating behavior
половая зрелость | размножение | нерест | Eggs | Fecundity | Larvae
Sexes separate. Spawning occurs in the cool season, from June to November. Growth is relatively rapid (about 7 to 8 cm in the first year), but the number of individuals reaching a 3 or 4 years age is small, because of a high rate of natural mortality.
Основная ссылка
ссылки | координатор | соавторы
Poutiers, J.M. 1998 Bivalves. Acephala, Lamellibranchia, Pelecypoda. p. 123-362. In Carpenter, K. E. and V. H. Niem. 1998. FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 1. Seaweeds, corals, bivalves, and gastropods. Rome, FAO. (ссылка 348)
Статус Красного Списка МСОП
(ссылка 130435: Version 2025-1)
Статус СИТЕС (ссылка 108899)
Not Evaluated
CMS (ссылка 116361)
Not Evaluated
Угроза для людей
Harmless
Использование человеком
рыболовство: коммерческий
| FishSource |
инструменты
дополнительная информация
Trophic EcologyFood items (preys)
состав пищи
потребление пищи
хищники
Population dynamicsрост
Max. ages / sizes
Length-weight rel.
Length-length rel.
Размерный состав
Mass conversion
численность
Life cycleразмножениеполовая зрелостьFecundityнерестEggsРазвитие икрыLarvae PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
ресурсы в Интернет
Estimates based on models
Preferred temperature
(Ref.
115969): 18.7 - 29, mean 27.6 (based on 1304 cells).
Fishing Vulnerability
Low vulnerability (10 of 100).
