his month (September 2011) we
welcome back for a second month, Adrian Taylor, member
of the Catfish
Study Group. This month
he takes a look at a small Sisorid catfish Glyptothorax
buchanani is a small to medium sized hillstream
catfish growing no more than 75mm SL from Metum, which
is a small swift affluent of the Mechem in Northern
Thailand. It was first described by Smith in 1945
and is like all Glyptothorax species in having
a '‘thoracic adhesive apparatus’, which
consists of many corrugated folds of skin, on the
ventral surface behind the mouth. Smith noted at the
time that this adhesive apparatus was roughly quadrangular
with an acute point anteriorly, and that unlike the
Glyptothorax species previously described,
Glyptothorax buchanani differed in the combination
of a short body, a moderately elongate caudal peduncle
and with the origin of the ventral fins being under
the last ray of the dorsal fin.
Care of Glyptothorax
buchanani is as the norm for hillstream catfishes.
An aquarium having a pH of between 6 and 7 a temperature
range between 20ºc and 25ºc, a sand substrate,
with a scattering of smooth rounded stones, pebbles
and small pieces of bogwood; heavily filtered as to
create a one directional flow of water as is possible,
along with a strong water changing regime, would go
towards making an ideal habitat for these attractive
but unusual hillstream catfish.
Smith named this
attractive catfish in honour of A. R. Buchanan of
the Borneo Company Ltd, who had collected for scientific
purposes many fishes of the Mechem river and its tributaries,
during the months of June, July, October and November
of 1935, something that no one had done before.
Asia:Chao Phraya basin, Thailand.
Thoracic adhesive apparatus,
which consist of many corrugated folds of skin, on
the ventral surface behind the mouth. Roughly
quadrangular with an acute point anteriorly.
short body, a moderately elongate
caudal peduncle and with the origin of the ventral
fins being under the last ray of the dorsal fin.
Pretty body colour of
dusky brown head region with three dark brown patches
on the dorsal and into the body, adipose fin with
dark brown patch leading into the body, caudal peduncle
with dark brown patch leading to half way into the
caudal on both lobes. Brown blotches near the tip
on both caudal lobes. Gold patch on the nape.
Care & Compatibility
Other Asian tank mates such
Rasboras, danios, devario's and puntius species.
No reports of
sexual differences. Although it is believed that the
females are more rotund ventrically than the males
when viewed from above.
Live foods such as white worms,
small earthworms and aquatic insect larvae like bloodworms
and similar chironomids, should make up the majority
of their weekly diet, as Glyptothorax buchanani
tends not to accept commercially prepared feeds such
as pellets and tablets; although they will eat frozen
food such as bloodworms.
finlike projection without rays, behind the rayed
dorsal fin. Caudal fin: The paired fins after
head and before anal fin. Caudal peduncle: The area between
the dorsal fin and the tail. Dorsal fin:The
primary rayed fin(s) on top of the body. Thoracic:Pertaining
to the chest area. Ventral fin: The paired fins, between
the pectorals and the anal fins.
With a carved breast-plate. buchanani: This
sp. of Glyptothorax was named in honour of
A. R. Buchanan, of the Borneo Co.Ltd., who in 1935,
made a small but valuable collection of fishes from
certain rivers of N.Thailand, from which collections
had not previously been made.