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Post by Chee Yung on Oct 20, 2005 19:24:20 GMT 8
Good that you hooked a Tiger BT ;D You are right that many native species died due to the changing conditions ... So naturally we introduce the best fish for the present conditions... some fish change the conditions to suit themselves and should be carefully understood before introduction...carp, tilapia and many other cichlids do that. I dont read those foreign books that talk about our local species but I read how they understand their own local species... they have made mistakes and we should learn from them. I have seen how tilapia released by aquariums started destroying my favorite stream in Taiping by digging and increasing siltation. We should be aware of such things before introducing such fish. Many introduced plants have no natural enemies to control them and quickly become noxious weeds. Natives have their own control mechanism. Like it is said in Jurassic Park: Life finds a way... imagine the killer bee saga caused by african bees introduced to USA. Dont mess with foreign species! Well after all this talk, it is still considered bunkum, I have made my point and accept yours Cheers CY
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Post by Admin on Oct 20, 2005 19:33:16 GMT 8
Like it is said in Jurassic Park: Life finds a way... Totally agree with this CY. We could never have known if the Peacock Basses were not introduced into the reservoirs, what type of fish will claim dominance. I dont read those foreign books that talk about our local species but I read how they understand their own local species... they have made mistakes and we should learn from themAgreed CY. We should try to learn more about our own species. Then we can learn how best to help them not become extinct. There is a very limited supply of literature about local species by local experts. CY, With regards to the fish you had mentioned. I know haruans and lampans are native to Singapore . Are baungs, tapahs, temolehs, green arowanas, lampam jawas also native to Singapore? Green arowanas are very territorial. So they'll kill each other in the wild too. So naturally we introduce the best fish for the present conditions...Do we have a local species which we can re-introduce into the local waters and have them breed in sufficient numbers for sport fishing? If these species can be identified, it always worth the effort to give it a try.
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Post by Chee Yung on Oct 21, 2005 11:52:48 GMT 8
Billy, YH and everyone else ... Thanks for the feedback and I will look out for the right local species for the present waters. Off hand, I know the still water species namely marbled goby, haruans, sepat, terubol and some lampams will do well. Large riverine species like sebarau, kalui, patin, tapah, arowana and temoleh may do well in the deeper reservoirs and those with streams running into them. Jungle river species like kelah, kenderap, tengas and various shrimps including udang galah need plenty of oxygen rich cooler waters and may not thrive well in still/warm waters... Of course, those proposed species are still 'in theory' as I know they thrive and breed in local spring fed tin mining lakes in Taiping...dont know whether the water PH, temperature, food etc are the same here Any other suggestions will be good Cheers CY
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Post by Chee Yung on Oct 22, 2005 15:12:33 GMT 8
.... you are suffering from home sickness because some of the species are indigenous to Malaysia Here's my 2 cents worth:- 1. marbled goby, haruans, sepat, terubol and some lampams. Our reservoirs already have most of the above. We need volunteers to transplant the lampan and introduce Sepat though. 2. Sebarau, Kalui and Arowana already exist in our reservoirs. I hope to time the spawning and transfer some sebarau eggs. Patin and Tapah need big river to breed. We do not have the luxury. Tapah can be introduced in our reservoirs to control those red ear terrapin though but they will not breed. 3. kelah, kenderap, tengas and Udang Galah. Unless we can turn back the clock, some of these species were once inhabiting the kallang river which lead all the way to pierce reservoir. You can find Udang Galah in certain locations in Singapore but Kelah are long gone. Like I said before, it is not a matter of re-introducing our indigenous species. The water conditions and various factors must be conducive too. If you notice, our reservoirs at present are always full to the brim. PUB do not release water no more before the monsoon. This could be detrimental to its bio-diversity as most of its inhabitants need enviromental cues such as wet or dry season to spawn in order to ensure maximum survival rate of their fries. When we compromise this, their spawning will not be as successful and that is part of the reasons Sebarau and other species are declining. Believe me this is only tip of the iceberg. At the lowest form of organisms, the domino effect could upset the ecosystem. You will now notice LP water are always muddy. I suspect the cost of purifying water is quite low now that it is no longer a concer to the authorities. Sadly, Nature Society here focus on Aviary than fishes. If this conditition persists, the waters will be void of fishes. Or we may consider introducing hardy fishes like the Cichlid. Now we are going back to why we are looking at Teomensis.... YH Hmmm... You're partially right YH, I can't wait to visit the home streams next month ! However, most species that occur in Malaysia do exist here too ... so I'm not being 'unrealistic' .. I guess Thanks for the info regarding water conditions. I guess your sebarau game plan is a great start. The other possible species suggested by you are also good as many do breed in still waters... I never expect Kelah, tapah and oxygen rich riverine fish to be reintroduced here .. like you said, depending on water conditions. Other than the negative stagnant water problem, the lack of weed is also bad for the ecosystem. Nature Society is concerned mostly about birds, corals and butterflies but doesn't know much about fishing and water management. It is up to us to educate them We need to have a group who understands water conditions and how to maintain ideal water pH etc. if we get to adopt a waterbody. The temensis idea is a good one for sportfishing YH... no doubt about it .... I just think that hitting a large haruan on a sepat streamer pattern really rocks!! ;D Thanks again! cheers CY
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