Leptasterias aequalis: Difference between revisions
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Many sea-stars broadcast spawn their embryos, where fertilization occurs in the water column, however Leptasterias species brood their embryos locally. The stars form mating aggregations and the female sits on her brood for a period of 6–8 weeks while the embryos develop underneath. Eventually the embryos fully metamorphose into juvenile sea-stars and walk away, and thus can only locally disperse. Larger females produce larger embryos of great quality, however, as larger broods are produced a considerable proportion of them are lost.<ref>{{Cite journal|title=Variability in broods of the seastar Leptasterias aequalis|last=Bingham|first=Brian|journal=Canadian Journal of Zoology|date=2004|volume=82|issue=3|pages=457–463|doi=10.1139/z04-009|url=https://digitalcommons.iwu.edu/cgi/viewcontent.cgi?article=1009&context=bio_scholarship}}</ref> |
Many sea-stars broadcast spawn their embryos, where fertilization occurs in the water column, however Leptasterias species brood their embryos locally. The stars form mating aggregations and the female sits on her brood for a period of 6–8 weeks while the embryos develop underneath. Eventually the embryos fully metamorphose into juvenile sea-stars and walk away, and thus can only locally disperse. Larger females produce larger embryos of great quality, however, as larger broods are produced a considerable proportion of them are lost.<ref>{{Cite journal|title=Variability in broods of the seastar Leptasterias aequalis|last=Bingham|first=Brian|journal=Canadian Journal of Zoology|date=2004|volume=82|issue=3|pages=457–463|doi=10.1139/z04-009|url=https://digitalcommons.iwu.edu/cgi/viewcontent.cgi?article=1009&context=bio_scholarship}}</ref> |
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==External links== |
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* CalPhoto image 2: [http://calphotos.berkeley.edu/cgi/img_query?enlarge=0000+0000+0900+0098] |
* CalPhoto image 2: [http://calphotos.berkeley.edu/cgi/img_query?enlarge=0000+0000+0900+0098] |
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Revision as of 12:42, 9 November 2020
| Leptasterias aequalis | |
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| Species: | L. aequalis
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| Leptasterias aequalis (Stimpson, 1862)
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Leptasterias aequalis, common names little six-rayed seastar or six-armed star, is a species of starfish.
This is a small species, with a total width of only about 5 centimetres (2.0 in). The coloration is extremely variable.
This seastar is found in the eastern Pacific Ocean, from Washington to Southern California. It lives on rocky shores, in the mid intertidal zone.
Many sea-stars broadcast spawn their embryos, where fertilization occurs in the water column, however Leptasterias species brood their embryos locally. The stars form mating aggregations and the female sits on her brood for a period of 6–8 weeks while the embryos develop underneath. Eventually the embryos fully metamorphose into juvenile sea-stars and walk away, and thus can only locally disperse. Larger females produce larger embryos of great quality, however, as larger broods are produced a considerable proportion of them are lost.[1]
References
- ^ Bingham, Brian (2004). "Variability in broods of the seastar Leptasterias aequalis". Canadian Journal of Zoology. 82 (3): 457–463. doi:10.1139/z04-009.
External links
 | This article about a starfish is a stub. You can help Wikipedia by expanding it. |