Free Content Palaeoceanography and Speciation in the Spiny Lobster Genus Panulirus in the Indo-Pacific

 Download
(PDF 810.2kb)
 
Download Article:

Abstract:

The spiny lobster genus Panulirus is a relatively recent one, its some 20 species all having evolved from a common Pacific ancestral type within the past ca. 5 million years. This paper describes the distribution of six Indo-Pacific species of Panulirus in relation to the surface ocean current systems which are responsible for the dispersal and return of their long-lived phyllosoma larvae. Based on previous published works by the same author, a very lengthy larval duration is postulated, which enables phyllosoma larvae to survive during extensive circumoceanic gyral circulation routes. It is hypothesized that larvae of each species will only metamorphose into the settling puerulus stage when they encounter physical and/or chemical cues native to endemic environments. Likely mechanisms inducing speciation are discussed. Speciation appears to have been accelerated during intervals of climatic and oceanographic change such as occurred during the series of interglacial/glacial oscillations characteristic of the Pleistocene epoch. At such times, changes in ocean current systems would have altered the degree of larval interchange between distant populations of the same species, thereby altering rates of gene flow. Lowered sea levels prevailing during glacial periods are postulated to have impeded the exchange of thermocline water, disrupting the transport mechanisms for phyllosoma larvae both within and between the Indian and Pacific Ocean basins.

Document Type: Research Article

Publication date: September 1, 1992

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more