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Lake Taal's freshwater sardines Sardinella tawilis (Herre): Evolutionary insights based on morphological, molecular, and geological data

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日付
2005
著者
Pagulayan, Roberto C.
Page views
1,037
ASFA keyword
lakes ASFA
freshwater fishes ASFA
evolution ASFA
morphometry ASFA
meristic counts ASFA
isoenzymes ASFA
mtDNA ASFA
Taxonomic term
Sardinella tawilis GBIF
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Sardines (family Clupeidae or herrings) are mostly marine species. In the Philippines, Lake Taal is the habitat of Sardinella tawilis (local name tawilis ), the only local endemic sardine species known to be fully adapted to a freshwater environment. Its evolutionary history is thus of great interest. So far, analyses of morphometric, meristic, isozyme, and mtDNA data point to the marine species Sardinella albella as the closest marine relative. Furthermore, mitochondrial DNA data revealed restricted substitution that may indicate either the beginning of a genetic differentiation of two tawilis sub-populations or the ghost of polymorphism past strengthened by genetic drift. Sardinella tawilis is believed to have emigrated from Balayan Bay to Lake Taal when it was formed in the course of volcanic eruptions some 240 years ago. The data do not, so far, support this contention. An alternative explanation on the speciation of this species is presented here.
URI
http://hdl.handle.net/10862/6115
Suggested Citation
Pagulayan, R. C. (2005). Lake Taal's freshwater sardines Sardinella tawilis (Herre): Evolutionary insights based on morphological, molecular, and geological data. In M. L. Cuvin-Aralar, R. S. Punongbayan, A. Santos-Borja, L. V. Castillo, E. V. Manalili, & M. M. Mendoza (Eds.), Proceedings of the First National Congress on Philippine Lakes (pp. 40-43). Southeast Asian Regional Center for Graduate Study and Research in Agriculture (SEARCA).
Type
Conference paper
ISSN
1656-8099
Collections
  • LakeCon2003 [49]

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