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Adrianus Franciscus Johannes Marinus Maria "Ad" Konings [1] (born 11 January 1956 in Roosendaal, Netherlands) is an ichthyologist originally trained in medicine and biology. Konings is best known for his research on African rift lake cichlids. After studies in Amsterdam, he has spent most of his life in Rotterdam.
Konings started keeping cichlids when he was 14 years old in 1970. Soon he was breeding rare African cichlids and working as an assistant to the largest tropical fish dealer in the Netherlands.
From 1974-1980 he studied medical biology at the University of Amsterdam and was awarded his Ph.D. in 1980. He chose this field despite his love of ichthyology due to a fear that if he chose the latter field he would be unemployable. From 1980-1986. he did research on lysosomal enzymes at the Erasmus University in Rotterdam. Most of this was DNA-related work (molecular biology).
In 1986, Konings moved to St. Leon-Rot, Germany (near Heidelberg), where he started to write books and breed Lake Tanganyika cichlids. He also worked for 18 months at the University of Heidelberg Parasitology Department.
Konings and his future wife started their own publishing company, Cichlid Press, in 1991. Its first book was titled the Cichlids Yearbook, vol. 1. The business grew and now publishes a number of cichlid guidebooks by Konings and other authors; its publications are often regarded as the standard reference works on various classes of African cichlids. Amazon booksellers list 36 different books or publications under his name.
He is also a prolific photographer, and a recent Google image search under his name yielded 6,900 images.
Late in her career famed ichthyologist Ethelwynn Trewavas mentored Konings, providing feedback and suggestions for his research. When her eyesight failed late in her life she asked him to accept her stereo microscope as a gift from the prominent African cichlid expert of the mid-20th century to the man who succeeded her in describing a multitude of new cichlid species.
Konings also was mentored by prominent fish explorer and exporter Stuart Grant early in his career, and when Konings married his wife Gertrud (nḗe Dudin), also a biologist, in 1996 in Malawi Grant and his wife Esther were best man and maid of honor.
Konings moved to El Paso, Texas, in 1996, relocating Cichlid Press along with his family. In interviews he has described a love of the area's climate and landscape as the reason for the move. The Konings have taken up the study of cacti since their move, photographing every species and variety of cactus native to Texas. [2]
He occasionally leads expeditions to Lake Malawi and lectures extensively around the world.
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Two Lake Malawi cichlids have been named after him, namely Aulonocara koningsi by Patrick Tawil in 2003, and Placidochromis koningsi by Hanssens in 2004.
The electric yellow cichlid is a popular freshwater aquarium fish. It is a naturally occurring variant of Labidochromis caeruleus endemic to the central western coastal region of Nkhata Bay in Lake Malawi in East Africa. It is the most popular African cichlid amongst aquarium hobbyists. These fish are mouthbrooders; the female lays her eggs on the surface of rocks and then scoops them into her mouth where they brood for 18 days before being released.
Mbuna is the common name for a large group of African cichlids from Lake Malawi, and are members of the haplochromine family. The name mbuna means "rockfish" in the language of the Tonga people of Malawi. As the name implies, most mbuna are cichlids that live among the piles of rocks and along the rocky shores of Lake Malawi, as opposed to the utaka, cichlids that live in the open water or on sandy shores or soft substrates. Some species of mbuna are highly sexually dimorphic, although many are not. Almost all of the cichlid species of Lake Malawi, including mbuna and non mbuna such as the utaka, are believed to have descended from one or a very few species that became isolated in the lake. With rising water levels, new habitats could be colonized and the many isolated rocky outcrops allowed new mbuna species to form. Their striking colors, intriguing behavioral characteristics, and relative hardiness make them very popular despite their unique demands for the home aquarist.
Pseudotropheus is a genus of fishes in the family Cichlidae. These mbuna cichlids are endemic to Lake Malawi in Eastern Africa.
Aulonocara is a genus of haplochromine cichlids endemic to Lake Malawi in East Africa. All Aulonocara species are maternal mouth brooders. Particularly in the aquarium hobby, Aulonocara species are also known as peacock cichlids, aulonocaras or simply "peacocks". This genus is strongly sexually dichromic, even by haplochromine standards.
Julidochromis is a genus of cichlids in the subfamily Pseudocrenilabrinae. They are commonly called julies and are endemic to Lake Tanganyika in eastern Africa. This genus includes six formally described species, some with a number local variants of uncertain taxonomic status. Further taxonomic work is required to determine how many species exist; the closely related Chalinochromis with two more species is sometimes included here and this may be correct. Hybridization makes attempts to determine relationships with molecular phylogenetic methods difficult.
Maylandia or Metriaclima is a genus of haplochromine cichlids endemic to Lake Malawi in East Africa. They belong to the mbuna (rock-dwelling) haplochromines.
Cynotilapia is a genus of haplochromine cichlids. All fishes in these genus form part of the mbuna flock, the rock-dwelling fishes of Lake Malawi, in the rift valley of East Africa. All species are polygamous, maternal, ovophile mouthbrooders and carry their fry in this fashion for about 20–30 days.
Ethelwynn Trewavas was an ichthyologist at the British Museum of Natural History. She was known for her work on the families Cichlidae and Sciaenidae. She worked with Charles Tate Regan, another ichthyologist and taxonomist.
Diplotaxodon is a small genus of seven formally described, as well as a number of undescribed, deep-water species of cichlid fish endemic to Lake Malawi in east Africa. These fishes represent a remarkable adaptive radiation of offshore and deep-water adapted fish descended from ancestral shallow water forms. They include the dominant zooplankton-feeding fish of the offshore and deep-water regions of the lake, as well as a number of larger species that appear to feed on small pelagic fishes. Adult sizes range from 10 to 30 cm in total length, depending on species.
Rhamphochromis is a genus of East African haplochromine cichlids endemic to the Lake Malawi basin, also including Lake Malombe, Lake Chilingali, Chia Lagoon and upper Shire River. They mainly occur in offshore open waters, but a few species also near the coast. They are piscivores that typically feed on lake sardines and small utaka cichlids.
Copadichromis borleyi is a species of haplochromine cichlid fish endemic to Lake Malawi in East Africa. The species is popular in the fishkeeping hobby where it is frequently kept in aquariums. The species has numerous common names, including redfin and goldfin hap.
Pseudotropheus johannii or the bluegray mbuna is an African freshwater fish from the family Cichlidae.
Aulonocara auditor is a species of haplochromine cichlid endemic to Lake Malawi. It was known only from the holotype collected in northern Lake Malawi near Vua, Malawi. The IUCN state that this species may possibly be extinct due to beach seining within its limited range but there are claims that it was observed in 1989 and was quite numerous, although this was later retracted and it was stated that these observations referred to Aulonocara aquilonium. Following an examination of the holotype, this examination also suggests that A. auditor may not be a species of Aulonocara and that more material needs to be collected and studied.
The Chitande aulonocara is a species of haplochromine cichlid which is endemic to Lake Malawi, only occurring in the north-west of the Lake near Chitande Island. It occurs over habitats of mixed rock and sand and it feeds on benthic invertebrates. The males show territorial behaviour all year and defend their territories from other males. These territorial males are found in deeper areas around 15 metres (49 ft) while the non territorial males and the females are rarely seen below 3 metres (9.8 ft). Ripe females descend towards the males and spawning takes place in a cavity or, if the male's territory does not include a cavity, on the open sand. The specific name honours the British ichthyologist Ethelwynn Trewavas (1900–1993) of the British Museum who described a number of species of cichlid from Lake Malawi.
Aulonocara guentheri is a species of haplochromine cichlid endemic to Lake Malawi, where they are restricted to the south eastern arm, and Lake Malombe, meaning that as far as is known this fish is endemic to Malawi. It prefers shallow sandy habitat where it forages in small schools, males in breeding colours have been caught by fishermen in November and December suggesting that is when they breed. The specific name honours the German born British herpetologist and ichthyologist Albert Günther (1830-1914), who was one of the first scientists to recognise the diversity of te cichlids in Lake Malawi.
The sulfurhead aulonocara or sulfurhead peacock is a species of haplochromine cichlid which is endemic to Lake Malawi in the country of Malawi and has only been observed on West Reef and Eccles Reef. It is threatened by collection for the aquarium trade and this has caused a 70% reduction in numbers. In this mouthbrooding species, the eggs are cared for by the females only, and it is found over mixed sand and rocky areas where they hunt small invertebrates in the sand. It closely resembles the blue orchid aulonocara though it develops a yellow blaze across its dorsal In the past these two taxa have been considered to be subspecies. The specific name honours Hans-Joachim Mayland, an author on cichlids and a fishkeeper, brought the species to the attention of Ethelwynn Trewavas.
Microchromis zebroides is a species of cichlid endemic to Lake Malawi where it is only known to occur around Likoma Island where it prefers shallow, rocky areas. This species can reach a length of 8.6 centimetres (3.4 in) TL. This species can also be found in the aquarium trade where it is known as the Mini-zebra.
Nyassachromis purpurans is a species of cichlid endemic to Lake Malawi where it prefers areas with sandy substrates. This species can reach a length of 18 centimetres (7.1 in) TL. It can also be found in the aquarium trade.
Tropheops lucerna is a species of cichlid endemic to Lake Malawi where it is found at depths of 2 to 4 metres in beds of Vallisneria in bays. This species can reach a length of 13.5 centimetres (5.3 in) TL. It can also be found in the aquarium trade. It feeds by brushing loose strands of algae off of rocks, sand and the leaves of macrophytes.
Aulonocara koningsi is a species of haplochromine cichlid which is endemic to Lake Malawi. It is restricted to the waters around Mbenji Island and is therefore endemic to Malawi too. It is common in the restricted area in which it occurs but collection for the aquarium trade does not seem to have affected the population.
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