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The African jewelfish needs slightly acidic water (generally pH 6.0–7.8) and warm water (72–82 °F or 22–28 °C) in order to thrive in captivity. [3] Because of the aggressive territorial behavior, it is often recommended keeping the species alone, but in large aquariums they can be kept with Congo tetras, Synodontis catfish and other robust species. [3]
In cichlid fish, it may be used to manage conflict within the group. Displaced aggression is experienced by humans and animals. Displaced aggression can also be known as triggered displaced aggression which is defined by a person being triggered, or provoked, by another to cause a display of negative emotion. [3]
Sexual dimorphism is limited, though male jewel cichlids are typically more brightly coloured and in some species have more pointed anal, ventral and dorsal fins. In some species, such as Hemichromis cristatus, the females can have coloring as bright as the males. Like most cichlids, jewel cichlids have highly developed brood care.
Usually, the female lays about 400 eggs on a stone and the male immediately fertilizes them. [5] At a temperature of 25.5 °C, after 48 hours they hatch. [ 5 ] After five and a half days, the fry swims freely and are led mainly by the female, while the male is mainly engaged in the defense of the territory.
The males of the Astatotilapia burtoni come in two phenotypes that are reversible. The males can readily switch between being territorial and non-territorial based on the social environment they are in: dominant, territorial males possess bright coloration, aggressive behavior while defending territory, and an active role in sexually reproducing with the females; subordinate and non ...
Domestic cat showing signs of aggression: Symptoms: Frantic scratching, biting or grooming of tail and lower back; aggression towards other animals, humans and itself; and a rippling or rolling of the dorsal lumbar skin. Usual onset: Around 9–12 months, or when the cat reaches maturity. Duration
Males of this species spawn with more than one female at a time, and do so in or near the females' shells. [3] Eggs are laid inside the shell, and take approximately three days to hatch. The fry are free swimming in one week. [7] It is possible to feed the fry with a turkey baster containing baby brine shrimp. [8]
The tank should be decorated with rocks to form caves and passageways as shelter; like many other Rift Valley cichlids, they tend to be territorial and somewhat aggressive. It is therefore best to keep them with other cichlids to defuse their rowdy behavior. Fry can stay with the parents and should be fed protein-rich foods such as baby brine ...