Altolamprologus calvus
Scientific name | Altolamprologus calvus |
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Descriptor | Poll |
Year of description | 1978 |
IUCN category (World) | NT |
Family | Cichlidae |
Genus | Altolamprologus |
Introduction
Altolamprologus calvus is an endemic cichlid species of Lake Tanganyika. It is limited to the southwestern part of the lake, where it sometimes coexists with its congener, A. compressiceps. This fish, initially rare due to occupying a specific ecological niche, has seen its populations decline. It is considered nearly threatened by the IUCN.
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Who is it?
Morphology
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Average size8 cm
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Maximum size13 cm
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Longevity15 year
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ShapeOvoid
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Patternvertical stripes
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Average size8 cm
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Maximum size13 cm
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Longevity15 year
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ShapeOvoid
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Patternvertical stripes
How to recognize Altolamprologus calvus ?
Altolamprologus calvus measures around 8 cm. However, dominant males can reach up to a dozen centimeters.
The species Altolamprologus calvus and A. compressiceps are often confused. However, several characteristics allow for easy identification. A. calvus has a more pointed and slender head, while A. compressiceps has a broader head. A. calvus has a more elongated and streamlined body, while A. compressiceps has a stockier and laterally compressed body.
Sexual dimorphism
The adult male is larger than the female. The genital papilla of the female is often prominent in adulthood.
Behaviour & Life cycle
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dietcarnivorous
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Sociabilityliving as a couple or alone
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territorialYes
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Way of livingdiurnal
This species tends to be easily stressed: this uneasiness is characterized by the appearance of marked black bars on its whole body.
Altolamprologus calvus is a specialized carnivorous species that feeds on small aquatic invertebrates. Its unique shape allows it to hunt in narrow fissures in rocky areas. Males are territorial and protect their living area, especially from same-sex conspecifics.
Reproduction
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Reproductionovipare qui pond sur substrat caché
Altolamprologus calvus is an oviparous fish that lays its eggs on hidden substrates. The spawns, which are very difficult to discover in secluded areas, never seem to involve more than a dozen eggs.
Harmless species
This species does not pose a particular danger to humans in case of an encounter in its natural habitat. This discreet species is very shy.
Where to find it?
Conservation status of populations (IUCN)
Geographic distribution & Conservation
This species is present in the southwest zone of the lake. Although fairly common, this specialized fish is one of the first to disappear when the conditions do not meet its requirements.
When an area has been fished for this species, it takes several months, or even a year, before it reappears. This appears to be due to its low fertility rate. It is primarily threatened by environmental deterioration.
What is its habitat?
Natural environment characteristics
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Temperature23 - 29 °C
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pH (acidity)7.8 - 9
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gh (hardness)15 - 25
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FlowSlow and Stagnant
Biotope presentation
Altolamprologus calvus is a specialized species that is strictly adapted to a specific type of rocky habitat, primarily composed of debris with very few sandy areas.
This hypothesis is confirmed by the fact that it is not found on isolated rocky outcrops that it could reach by crossing sand barriers that other rock-dwelling fish could cross. It is often absent from areas where the rocks are smooth and support only a low biological coverage.
Species of the same biotope
Main recommendations for fishkeeping
Deontology
In order to preserve wildlife, if you acquire this animal, it must not be released into the wild. See also, the Fishipedia charter.
Fishipedia supports the practice of responsible and environmentally friendly aquarium keeping. We encourage maintenance if it is motivated by a desire to understand the biological functioning of living things and if it is done with respect for animal life.
We believe that aquaristics is an opening to the discovery of aquatic environments, especially freshwater, and that this knowledge is necessary to better protect and respect these environments. Logically, we refute the compulsive purchase of animals that would not find a sufficient and / or adapted place in the host aquarium.
Our recommendations
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Min volume250 liters
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Population min2
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Temperature23 - 29 °C
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pH (acidity)7.8 - 9
Characteristics
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Difficulty breedingmoderate
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Robustnesstolerant
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Behaviourpeaceful
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Availabilityoccasional
General reminders
It is strongly advised to read the complete dedicated file and to get information on the feedbacks of maintenance of the envisaged animal, this to avoid any potential conflict whose end result is generally the death of the individual (or the other inhabitants). It is important not to overload your aquarium to limit pollution. This will make maintenance easier.
In nature, animals are subject to weather conditions and live in waters with variable characteristics. The recommendations offered by our team for aquarium maintenance are a guidance and cannot be assimilated to scientific datas.
General reminder on maintenance datas
Le démarrage d'un aquarium est une partie primordiale pour l'équilibre et le bien-être des poissons. Lorsque l'on met en eau un aquarium, l'eau passe naturellement par un cycle biologique : le cycle de l'azote. Celui-ci dure environ trois semaines. Tous les 2 jours, nous vous conseillons de tester votre eau jusqu'à ce que le taux de nitrite soit à zéro pendant plusieurs jours d'affilée.
Pour accélérer ce cycle, vous pouvez utiliser un activateur de bactéries comme JBL Denitrol. Cette solution riche en bactéries vivantes et enzymes permet une mise en place rapide du cycle de l'azote. Les poissons peuvent alors être introduits plus rapidement.
Il est important de tester l'eau de son aquarium régulièrement pour maintenir un environnement sain pour les poissons et les autres habitants. Les tests d'eau permettent de mesurer les niveaux de différents paramètres tels que le pH, la dureté totale, ainsi que les taux de nitrates, de nitrites et d'ammoniaque.
Pour réaliser ces tests, vous pouvez utiliser des produits d'analyse spécialisés tels que JBL ProScan qui permet de réaliser un diagnostic de l'eau directement via un smartphone. Il existe également des coffrets de tests plus classiques de bandelettes, comme JBL PROAQUATEST.
En cas d’usage de l’eau du robinet, vous pouvez utiliser un conditionneur d’eau de type Biotopol de JBL pour éliminer les substances nocives comme le chlore, le cuivre, le plomb et le zinc. Les conditionneurs d'eau garantissent une meilleure santé aux poissons et une meilleure croissance des plantes.
Chlorine and chloramine are dangerous for the health of animals. Used to disinfect water, these agents are present in significant quantities in tap water. We recommend using an anti-chlorine agent every time you change the water. In addition to chlorine, treatments and medicines sold for aquarium use sometimes contain dangerous heavy metals in high doses.
Specific needs for Altolamprologus calvus
Altolamprologus calvus is a species which lives naturally at a temperature between 23 °C and 29 °C. For proper maintenance, the temperature should never exceed the 32°C for long periods. Nitrate levels should remain below 50mg/L. To keep the water clean and unpolluted, plan on changing 20% to 30% of the water volume each month.
The breeding of this species is accessible on condition of being well informed about its needs in aquarium . Any cohabitants must be chosen with care to avoid the loss of animals.
This species is generally available in specialized shops or from aquarium clubs. Specimens that have been bred for a long time are easier to breed, but special water parameters must be respected.
Cohabitation & Environment
In a community aquarium context, this species should be kept in a minimum volume of 250 liters.
Fearful by nature, it is advised not to let Altolamprologus calvus cohabit with large territorial species or with too aggressive fish. It can easily evolve with territorial neighbors with a peaceful temperament or with non-territorial species.
Be careful to plan an adequate space for each territorial species. Each species should have a surface and a decor allowing it to juxtapose its territory with that of its neighbors.
To best reproduce the biotope of this species, you can cover the bottom of the tank with sand and put a pile of stones to form caves.
Basic water maintenance
Altolamprologus calvus naturally living in basic water, the presence of limestone rocks such as millstone or travertine will improve its environment. It is also advisable to add sand with a contribution of specific salts to stabilize the pH, to be gauged according to the hardness of the water used.Tips for feeding
Altolamprologus calvus is carnivorous.
This species can eat dry food (flakes, pellets), fresh food and frozen food. To avoid deficiencies, it is recommended to vary the types of food.
You should not overfeed your residents to avoid polluting the water. For most species, it is better to feed a few small portions each day rather than one large meal.
Food recommendations from our partner JBL - Products PRONOVO
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Granules
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Flakes
Reproduction protocol
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Maintenance difficultymoderate
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egg-laying protectionYes
Reproduction of this species in an aquarium is considered moderate. Ideally, it takes place at a temperature of around 27 ° C for a pH of 8.5 .
Hybridization risks
In general, it is advised not to mix several species of the same genus or different varieties of the same species, to avoid the risks of hybridization.
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To go further
Sources & Contributions
Participation & Validation
The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.
Benoît Jonas
Robert Allgayer
Benoit Chartrer
Translation
Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.
In collaboration with : Fédération Française Aquariophilie