LIVEBEARERS T Phallichthys tico - - a dainty new ... - Aqualog

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Aqualognews NUMBER 94 12 is a great shame, as cultivated forms teach us the mechanisms of evolution. They demonstrate – within a much reduced time-frame - in what directions an animal species can develop, where its genetic potential lies. At the same time the cultivated forms of ornamental fishes are still very young; the first importation of angelfishes to Germany took place in 1909, but the first cultivated forms didn’t appear until considerably later. The jaguar angelfish Although as far as we know this cultivated form has not previously been portrayed in the literature using photos taken in life, it has nevertheless been known for quite some time.The strain that Aquarium Glaser is now offering under the name “Jaguar Angelfish” originates from two specimens that were discovered by chance and purchased at a fish-club auction in autumn 2009. These specimens were passed to a professional breeder who has now bred Jaguar angelfish them successfully, a good year later. Because it was necessary to pair the two original specimens with other angelfishes, at present only about 50% of the offspring turn out to be “jaguar”.Only the future can tell whether it will be possible to produce a strain of jaguar angelfish that breeds true.
Aqualognews NUMBER 94 13 Phallichthys tico - - a dainty new livebearer by Sarah Nieten The long copulatory organ in males is the reason for the genus name: the word Phallichthys means “penis fish”! T Phallichtys tico,male. Photos: Frank Schäfer he mating and reproductive habits of their study subjects have always been of particular interest to zoologists. Think what you will about zoologists: the size of the gonopodium (the term for the copulatory organ in male livebearing toothcarps, formed by the modification of the anal fin) is an important indicator of mating behavior without the need to observe the fishes for a long period of time. All a matter of length Livebearing toothcarps with a short gonopodium – these include the extensive Molly assemblage, to which the Guppy also belongs - as a rule have a highly differentiated and complicated courtship LIVEBEARERS behavior. In these species the female decides with which male she will mate and thus makes an active mate choice. By contrast, in species with a long gonopo-
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LIVEBEARERS T Phallichthys tico - - a dainty new ... - Aqualog

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