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| Title: | Some aspects of the ecology and biology of Empurau (Tor tambroides) and Semah (Tor douronensis) in Sarawak, Malaysia |
| Authors: | David Tinggi
Stephen Sungan
Nigel Salam
Culbert Sadi |
| Issue Date: | 2000 |
| Publisher: | Malaysian Fisheries Society |
| Citation: | Mahseer : the biology, culture and conservation supplementary volume : proceedings of the International Symposium on the Mahseer 29-30 March 2006 Kuala Lumpur, Malaysia, p. 3-10 |
| Series: | Occasional publication |
| Abstract: | Tor tambroides and T. douronensis are highly-valued indigenous riverine fish species in Sarawak, Malaysia. Degradation of the aquatic environment and exploitation had contributed to their diminishing populations. Other factors which could affect natural replenishment of the stocks are those associated with their biology and ecology. In the wild, both species prefer lotic environment with clean and highly oxygenated waters. They are therefore mostly found in the upper reaches of the rivers with the stony, pebbly or rocky bottoms. Their natural foods comprise mainly plant parts, aquatic invertebrates, insects and small prawns. The fecundity is generally low and variable, ranging from a few hundred to just a few thousand eggs. Both species require long incubation (about 3 days and 3 nights) and quiescent (6–7 days) periods; the larvae are negatively phototropic and exhibit grouping behaviour after hatching until yolk sac is absorbed. These aspects could affect their natural populations, unless certain environmental conditions are met. This paper attempts to shed light on some aspects of the ecology and biology of these two species, based on our observations and experiences. |
| License: | http://www.oceandocs.org/license |
| URI: | http://agris.upm.edu.my:8080/dspace/handle/0/23724 |
| ISBN: | 978-983-4382308 |
| Appears in Collections: | Publications
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