Hi To all,
We at
http://www.iah.in have been following the E. Canarensis locally in India and had actually made a trip last May 2005 to collect some of these fishes from the wild.
Link :-
http://indianaquariumhobbyist.com/commu ... =17&page=1
http://indianaquariumhobbyist.com/commu ... tit&lid=32
The Survey had the following data & comments :-
1. Location One Netravati River Biotype:-
GPS Position:
N 12D 49.573M
E 75D 34.212M
Altitude - 460 feet above mean sea level.
pH = 6.5
Water Temparature - 32.6 Deg C at Noon.
TDS - 50 ppm
Conductivity- 94 microsiemens
Kh - 2 degrees
Gh - 2 degrees
Water Velocity: 1.1Km/Hr to 1.5Km/Hr
Water Depth: 2 feet To 4 feet
Lab Test Of Water Parameters Collected form this Location:-
pH - 6.58
Total Hardness as CaCO3 - 26
Iron as Fe - Nil
Chlorides as Cl - 9
Total dissolved Solid - 80
Calcium as Ca - 6
Copper as Cu - Nil
Manganese as Mn - Nil
Sulphate as SO4 - 13
Alkalinity Total (as CACO3) - 34
Magnesium as Mg - 2ppm
Carbonate as CaC03 - 26
Non Carbonate - Nil
Hydroxide Alkalinity as CaCO3 - Nil
Carbonate Alkalinity as CaCO3 - 12
BiCarbonate Alkalinity as CaCO3 - 22
P- Alkalinity as CaCO3 - 6
M.O. Alkalinity as CaCO3 - 28
Suspended Solids - 40
Conductivity - 76.4
2. Location On Kumardhara River Biotype :-
GPS Position:
N 12D 40.796M
E 75D 36.805M
Altitude - 493 Feet above Mean Sea Level.
pH = 6.5
Water Temparature - 33.1 Deg C at 1800 hrs.
TDS - 40 ppm
Conductivity- 85 microsiemens
Kh - 2 degrees
Gh - 2 degrees
Water Depth: 2 feet To 4 feet
pH - 6.76
Total Hardness as CaCO3 - 28
Iron as Fe - Nil
Chlorides as Cl - 5
Total dissolved Solids - 50
Calcium as Ca - 6
Copper as Cu - Nil
Manganese as Mn - Nil
Sulphate as SO4 - 6
Alkalinity Total (as CACO3) - 30
Magnesium as Mg - 3ppm
Carbonate as CaC03 - 28
Non Carbonate - Nil
Hydroxide Alkalinity as CaCO3 - Nil
Carbonate Alkalinity as CaCO3 - 6
BiCarbonate Alkalinity as CaCO3 - 24
P- Alkalinity as CaCO3 - 3
M.O. Alkalinity as CaCO3 - 27
Suspended Solids - 10
Conductivity - 74.2
There are numerous fish in the river but not in the large numbers that we
would like to see. Both these locations are between 75 - 100 kilometers from Mangalore where the rivers enter the sea. All fish photographed were juveniles. Adults were seen but very difficult to catch. The water depth in both these rivers was not in excess of 4 feet in the locations we found.
This puts ends to all speculation that these fish inhabit brackish waters.
What we feel is these fish inhibit and breed in the soft, oxygen rich slow
flowing waters well away from the sea and salt. During the monsoon these
rivers turn into torrents and these fish are washed closer to the coast and
what's trapped there near the coast have been collected previously.
We doubt these fish breed during the monsoons as the rivers are a raging
torrent and the waters would be at a TDS of practically ZERO.
The juveniles we sighted were about 4 months old. So the fish breed in
Dec-Jan when the water temparature in these parts should drop to about 25 Deg C or lower.
Maintaining these fish at the higher temparature of 33 Deg C and gradually
dropping the temparature to about 25 Deg or lower over a couple of weeks should trigger spawning.
Another option is to drop the temparature and raise it back again to 33 Deg C, if in case these juvenile fish are actually younger than 4-5 months, this would be the temparature variation say in Feb-March.
E.canarensis were found gazing on the algae on rocks. In all 3 biotopes they were seldom found alone. They were along with P.filamentosus, P.aurilius, P.mahecola. Sounded that they followed the barbs for safety and mostly found along the rocky banks. Also when stood with no movements they were pecking on our legs. What a moment it was to be pecked by one of the rarest cichlid in the world!
Also found a group of E.maculatus & E.suratensis in pure fresh water along
sandy banks along with a few panchax and barbs. But these guys were extremely brilliant. When we tried to chase them to our nets they were smart enough to take a diversion away from the net through narrow paths between rocks. ....and Pristolepis malabaricus too shared the waters with E.canarensis, but unlike them P.malabaricus were seen among roots and drift woods on the banks of the water hole. And the tiny puffers.
Also am happy to report successful spawining of E. Canarensis in captivity by one of our members "Tim" in US.
the details are at :-
1.
http://www.indianaquariumhobbyist.com/c ... 03&start=0
2.
http://www.petfrd.com/forum/showthread.php?t=19418
As per Tim the following triggered spawining:-
Yes they are fiercely protecting the spawn, the tank is large (220Gallon) but is overpopulated with 20 E. Canarensis and 7 Puntius Denisonii......I am a bit nervous keeping the spawn in the large tank with all the other fish......The Puntius Denisonii look ready to snack at any time .....but I am keeping them well fed and hopefully they will leave the spawn alone.....
tim
Here is a brief history:
I have a large (220 gallon) tank with 20 E. Canarensis and 7 Puntius Denisonii, the Canarensis are two groups the oldest is now two years old and the younger group is about a year and a half (I acquired them a year ago, and they were very small, presumably from the Dec 2004/Jan 2005 season.) A pair formed from the older group and had an earlier unsuccessful spawn about 6-8 weeks ago.
This time, the water temperature had been 78F for some time, and we had a week of warm weather which caused the temp to perk up to 83F, this was followed by some initial courtship behaviour. Noticing this I made two significant water changes (2x25%) and fed them heavily with Mysis…..the water changes were made on Thursday and Friday, by Saturday afternoon the Oviduct was visible on the female, and nest-building had begun in a manner very reminiscent of E. Macalatus. Sunday evening the spawn occurred late in the day.
I have many pictures which I will forward to you showing the sexual dimorphic colour patterns which are striking.
So hope this give all of you enough information on EC specially on the Biotype / water parameters & of course an insite to breeding them in captivity....
Best Of Luck!!!!
Regards
Sujoy
(member of iah.in & participated in the hunt for EC in India May 2005)
Source :-
http://www.iah.in