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AMAZONAS 42 COVER STORY Pterophyllum altum: H.-G. EVERS
O. KLAWONN Group of tank-bred Pterophyllum altum, whose parents were wild-caughts from the Río Inirida—the so-called Siegrist strain. Right: P. altum from the Río Atabapo at the around four years. This form exhibits a lot of red on the back. B. KAHL; INSET: S. FORKEL by Simon Forkel For more than four years I have been intensively involved in the breeding of Pterophyllum altum, the Altum Angel. I began with captive-bred stock before I ventured to breed wild-caughts. Not only water and food quality, but also the conditions under which the fry are reared, are keys to successful breeding of this coveted species. My first tank-bred Pterophyllum altum originated from Switzerland. They were bred by Adolf Siegrist, who had been breeding these majestic fish since 1993. I found these fish particularly pleasing, as they had a high body form, a lot of red on the head and back regions, and long fins. I subsequently obtained tank-breds from Horst Linke, who had reared very large numbers over a period of many years. Since 1994 I have been working professionally in the aquarium hobby, and I have also been able to obtain wild-caught fish from my wholesalers. I was thus fortunate enough to obtain healthy imports from Colombia and Venezuela, which has become very difficult in recent years. According to the exporters, these fish originated from the Río Orinoco, the Río Inirida, and the Río Atabapo, the type locality of this species. I noticed that Pterophyllum altum from the Río Orinoco exhibited a greater blue component, with red dots on the head and back regions; that specimens from the Río Inirida had more red spots on the head and back regions; and that those from the Río Atabapo had a very large amount of red all over the head and back regions. Two specimens demonstrated this particularly clearly. Luckily, they were a pair! So I had sufficient broodstock to start breeding Pterophyllum altum. My first success was with 18-month-old specimens from the Siegrist strain, and shortly thereafter with fish of the Linke strain as well. Since then I have also crossed the two strains. I also persuaded a wild-caught male from the Río Atabapo to spawn with a female of the Siegrist strain. Recently I also managed to mate a female from the Río Orinoco with a male of the Linke strain. But crossing Pterophyllum altum with P. scalare was never part of my plan. My favorites are the wild-caughts from the Río Atabapo, as they exhibit a very large red component, and the wild-caughts from the Río Inrida.* Spawning at low pressure When an 18-month-old pair formed from a group of tank-breds of the Siegrist strain, I placed them in a tank measuring 48 x 24 x 24 inches (120 the King of the Río Orinoco AMAZONAS 43
Page 1: FRESHWATER AQUARIUMS & TROPICAL DIS
Page 4 and 5: EDITORIAL AMAZONAS 4 Dear Reader, A
Page 6 and 7: AQUATIC AMAZONAS 6 NOTEBOOK by Dr.
Page 8 and 9: AMAZONAS 8 TM Top: Xingu version of
Page 10 and 11: AQUATIC AMAZONAS 10 NOTEBOOK A new
Page 12 and 13: AQUATIC AMAZONAS 12 NOTEBOOK the mi
Page 14 and 15: AQUATIC AMAZONAS 14 Right: Preserve
Page 16 and 17: AMAZONAS 16 AQUATIC Peckoltia otali
Page 18 and 19: AQUATIC AMAZONAS 18 NOTEBOOK artic
Page 20 and 21: 20 Does size matter to you ? We bet
Page 22 and 23: AMAZONAS 22 Revolutionary Lighting
Page 24 and 25: AMAZONAS 24 COVER STORY Pterophyllu
Page 26 and 27: AMAZONAS 26 Pterophyllum altum from
Page 28 and 29: AMAZONAS 28 base of the dorsal fin.
Page 30 and 31: AMAZONAS 30 scientific literature.
Page 32 and 33: AMAZONAS AMAZONAS 32 A life with an
Page 34 and 35: AMAZONAS 34 Above, left to right: O
Page 36 and 37: AMAZONAS 36 tions to produce good f
Page 38 and 39: AMAZONAS 38 Unfortunately, the tank
Page 40 and 41: AMAZONAS 40 some of the young in ou
Page 44 and 45: AMAZONAS 44 Wild-caught pair from t
Page 46 and 47: AMAZONAS 46 Above: The young are fe
Page 48 and 49: AMAZONAS 48 COVER STORY Angelfish:
Page 50 and 51: AMAZONAS 50 Despite this preservati
Page 52 and 53: AMAZONAS 52 Stephens really hits ho
Page 54 and 55: AMAZONAS 54 Some of the latest exam
Page 56 and 57: AMAZONAS 56 Slavkov’s Bulgarian G
Page 58 and 59: FISHKEEPING BASICS Common health pr
Page 60 and 61: AMAZONAS 60 Inspired by Mother Natu
Page 62 and 63: AMAZONAS 62 Avoiding trouble As lon
Page 64 and 65: AMAZONAS 64 their introduction befo
Page 66 and 67: AMAZONAS 66 FISH ROOM TOUR article
Page 68 and 69: AMAZONAS 68 A female Aulonocara jac
Page 70 and 71: AMAZONAS 70 Pairs of shell-dwelling
Page 72 and 73: AMAZONAS 72 Above: Pseudomugil gert
Page 74 and 75: AMAZONAS 74 HUSBANDRY & BREEDING Wi
Page 76 and 77: AMAZONAS 76 Above, left to right: I
Page 78 and 79: AMAZONAS 78 HUSBANDRY Chilatherina
Page 80 and 81: AMAZONAS 80 The next morning, thoug
Page 82 and 83: AMAZONAS 82 From Thailand New Snake
Page 84 and 85: AMAZONAS 84 It wasn’t long before
Page 86 and 87: AMAZONAS 86 Above: The young of Cha
Page 88 and 89: 88 UNITED STATES Arizona Aqua Touch
Page 90 and 91: AMAZONAS 90 SPECIES SNAPSHOTS ➊ T
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AMAZONAS 92 SPECIES SNAPSHOTS Hypop
Page 94 and 95:
SOCIETY AMAZONAS 94 CONNECTIONS U.S
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24/7 VISIT OFTEN: • Web-Special A
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AMAZONAS 98 UNDERWATER EYE Mustard
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