|
|
|
Cyprinds
/ Danios / Giant Danio
Giant Danio
Danio aequipinnatus | Pictures
Synonyms: Danio
alburnus, D. aurolineatus, D. malabaricus, Perilampus aurolineatus, P. malabaricus
Physical description: An elongated fish with one pair of barbels.
The body is laterally compressed and
the mouth is up-turned.
The back is gray-yellow to gray-green while the flanks are bluish-green.
This area is marked with various yellow
spots and stripes.
The outer parts of the fins are transparent, while their may have a green or pink tinge.
Size/Length: To 4.8" (12 cm)
Similar species: Bengal Danio ( D.
devario ), Queen Danio (
D. regina )
Habitat: Inhabits still and slow-moving rivers on the western coasts of Sri Lanka and India.
S: All
Aquarium: A school can be kept in a tank measuring 36" (91 cm) with a volume of 30 gallons
(114 L), although they would prefer a longer tank (48").
Leave open swimming areas and plant the corners
with robust plants.
Use a tight-fitting cover.
Water chemistry: pH 6-8 (7.0), 2-20 dH (8), 70-75°F (21-24°C)
Social behavior: An active, schooling fish that should only be combined with species that can tolerate
its activity.
Pairs form bonds, although they are not as strong as those of
Brachydanio species.
Suggested companions: Loaches, Epalzeorhynchus
, Loricarids, Armored Catfish (
Corydoras ), Danios, Gouramis, Acaras, Eartheaters,
larger barbs.
FOOD: Flakes; live; insect larvae, crustaceans, worms, insects.
Sexual differences: Males are smaller, slimmer, and more colorful.
Breeding techniques: Use water with a temperature from 77-82°F (25-28°C).
Add the female a day prior to adding
the male.
Spawning is initiated by the morning sun,.
10-20 eggs are laid at each pairing until 300-1000
eggs have been scattered among plants.
Throughout the spawning the parents should be fed with whiteworms so
they do not consume their spawn.
The young hatch in two days and are free-swimming five to seven days later.
Start
feeding with powdered dry foods and small live foods.
Breeding potential: 5.
The Giant Danio is easy to breed in a large breeding tank.
Remarks: A few color varieties are known.
Fish are mature from 2.8" (7 cm) in length.
Difficulty of care: 2.
A robust species.
Recent articles about fish
Overfishing may hurt Amazon forest trees
(2/5/2008) Overfishing is reducing the effectiveness of seed dispersal by fish in the Brazilian Pantanal, reports Nature. The research suggests that fishing practices can affect forest health.
Scientists find fish that literally lives in trees
(10/17/2007) Scientists have found a fish that literally lives in trees, according to research published in The American Naturalist and highlighted in New Scientist Magazine.
Piranhas originated when Amazon was flooded by seawater
(12/4/2007) South America's piranha family of fish -- notorious as eaters of flesh -- can be traced back to a single ancestor which dispersed when the Amazon was flooded by seawater some five million years ago, report researchers from the Institut de Recherche Pour le Developpement (IRD). Today piranhas are exclusively freshwater fish found from the Orinoco River basin in Venezuela to the Parana in Argentina.
How to save the world's oceans from overfishing
(7/8/2007) Global fishing stocks are in trouble. After expanding from 18 millions tons in 1950 to around 94 million tons in 2000, annual world fish catch has leveled off and may even be declining. Scientists estimate that the number of large predatory fish in the oceans has fallen by 90 percent since the 1950s, while about one-quarter of the world's fisheries are overexploited, depleted, or recovering from depletion. Despite these dire trends, the situation is changing. Today some of the world's largest environmental groups are focused on addressing the health of marine life and oceans, while sustainable fisheries management is at the top of the agenda for intergovenmental bodies. At the forefront of these efforts is Mike Sutton, director of the Monterey Bay Aquarium's conservation program: the Center for the Future of the Oceans. The aquarium, which has long been recognized as one of the world's most important marine research facilities, is pioneering new strategies for protecting the planet's oceans. Sutton says the approach has four parts: establishing new marine protected areas, pushing for ocean policy reform, promoting sustainable seafood, and protecting wildlife and marine ecosystems.
|
|
|
