Common names from other countries
Classification / Names / Names
俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS
Environment: milieu / climate zone / depth range / distribution range
生態學
大洋性; 海洋洄游的 (Ref. 75906); 深度上下限 0 - 4330 m (Ref. 116169). ; 90°N - 90°S, 180°W - 180°E
Atlantic Ocean and Indo-Pacific: Stenella longirostris longirostris: Around oceanic islands in the tropical Atlantic, Indian, Western and Central Pacific east to about 145°W. Tropical, subtropical.
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm 164.1, range 152 - 182 cm Max length : 240 cm TL 雄魚/尚未辨別雌雄; (Ref. 1394); 200 cm TL (female); 最大體重: 77.0 kg (Ref. 1394)
Spinner dolphins have various forms depending on their geographical locations. Commonly, these are small and slender animals that have a relatively long slender beak. It has a tripartite coloration which consists of a dark grey dorsal cape, lighter grey lateral field and a white or very light ventral field. A dark band runs from the eye to the flipper, bordered above by a thin line. It has a clearly discernible contrast of cape with the lateral field and a smooth curve on the ventral margin of cape over the eye. The ventral white field extends dorsal variably nearly to level of eye; margin speckled; genital and axillary areas confluent. It also has a high to medium contrast between flipper band and gular region wherein variable spots are visible. Its flippers are dark or speckled. In adult males the dorsal fin is falcate to triangular and has a small to medium protuberant ventral keel.
Dolphins are directly caught for use as shark-bait in Sta. Ana and Aparri, Philippines (Ref. 77119). Reside in coastal waters (Ref. 97368). May seek shelter in shallow sandy bottoms to protect themselves from predators (Ref. 80498). Observed year-round during daytime in sheltered bays or within lagoons. Forming schools ranging in size from 15 to 30 individuals to as large as 100 to 140 individuals (Ref. 97372). Feeds predominantly at night on deeper, offshore waters (Ref. 122680) and rest during much of the day (Ref. 1394); on small (5 to 10 cm long) fishes, shrimps, and squid in deep offshore waters from the mesopelagic boundary. Follows the diel horizontal migration as well as the vertical migrations of its prey (Refs. 97368).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Sexual maturity attained between 4 to 7 years (females, 165-170 cm) and 7 to 10 years (males, 160-180 cm). Promiscuous, with observable courtship display. Gestation period averages 10 months, produces only one calf. Born at 3-year intervals, calves are nursed for at least a year and weaned between 1 to 3 years (Ref. 80521).
主要參考資料
參考文獻 | 合作者 | 合作者
Tan, J.M.L. 1995. (Ref. 936)
IUCN 瀕危狀態 (Ref. 130435)
無危 (LC) ; Date assessed: 20 February 2018
CITES狀態 (Ref. 108899)
人類使用
漁業: 商業性
FAO - 漁業: landings, 魚種描繪 | FishSource | 周邊海洋
工具
網路資源
Estimates based on models
Preferred temperature
(Ref.
115969): 2.6 - 14.4, mean 4.8 (based on 3285 cells).
回復力
高度, 族群倍增時間少於 15個月 (K=0.41-0.54; tm=5).
瀕危性
High to very high vulnerability (75 of 100).
價格種類
Unknown.
