| 词条 | Leptasterias pusilla |
| 释义 |
| image = | name = Leptasterias pusilla | regnum = Animalia | phylum = Echinodermata | classis = Asteroidea | ordo = Forcipulatida | familia = Asteriidae | genus = Leptasterias | species = pusilla | binomial = Leptasterias pusilla | binomial_authority = (Fisher, 1930) }} Leptasterias pusilla is a small, six-rayed sea star. Description"A dainty little six-rayed seastar with a total arm spread usually under 2 cm."[1] Distribution"The genus Leptasterias originates in the Arctic,"[2] and within the United States, this species can be found in the middle intertidal zone of rocky shores of central California, including San Mateo, Santa Cruz, and Monterey counties. Leptasterias pusilla is "...generally believed to be the most abundant species in the subgenus [Hexasterias] along the North American Pacific coast from central California to southern Alaska."[3] BehaviorLeptasterias pusilla may be quite numerous in the middle intertidal zone of rocky shores, typically moving around on the top of rocks at night after hiding under them during the day.[1]DietPoikilotherms primarily feed on small gastropods, with only minimal metabolic rate fluctuations in response to changes in ambient temperature.[4]ReproductionThe Leptasterias pusilla "...breeding habits are famous." The mother keeps the eggs and larvae in brood clusters around her mouth area until the larvae reach adult form. "Ovigerous females may be found in January and February, with the minute offspring seen in tide pools during February and March."[1] See also
Further reading
Footnotes1. ^1 2 Ricketts, Edward, et al. (1985). Between Pacific tides. Stanford University Press, 60-61. {{ISBN|0-8047-2068-1}}. 2. ^Himmelman, J.H., et al. "Brooding behaviour of the northern sea star Leptasterias polaris." Marine Biology. 1982;68(3):235-240. 3. ^Hrincevich, Adam, et al. "Phylogenetic Analysis of Molecular Lineages in a Species-Rich Subgenus of Sea Stars (Leptasterias Subgenus Hexasterias)." Amer Zool. 2000;40:365–374. 4. ^Fuhrman, Geraldine. "Oxygen consumption of animals and tissues as a function of temperature." The Journal of General Physiology. 1958:715-722. External links
2 : Leptasterias|Animals described in 1930 |
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