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Apistogramma
''Apistogramma'' is a large genus of freshwater fish in the family (biology), family Cichlidae native to South America, but also commonly kept in Freshwater aquarium, aquariums. They are dwarf cichlids that mostly feed on tiny animals and have breeding behaviors that vary depending on the exact species. Range, conservation status and habitat ''Apistogramma'' are exclusively found in tropical and subtropical South America in the lowlands east of the Andes. The highest Species richness, richness is in the western Amazon Basin and Orinoco Basin, but there are also species in the Guianan Shield, eastern Amazon Basin, rivers flowing into the Atlantic in northern Brazil (Tocantins River, Tocantins–Araguaia River, Araguaia to Parnaíba River, Parnaíba) and the Río de la Plata Basin.Kullander, S.O., and E.J.G. Ferreira (2005). Two new species of Apistogramma Regan (Teleostei: Cichlidae) from the rio Trombetas, Pará State, Brazil. Neotrop. ichthyol. 3(3). Although a few species are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apistogramma Agassizii
''Apistogramma agassizii'', commonly known as Agassiz's dwarf cichlid, is a species of cichlid found in the Marañón River, Marañón and Ucayali River in Peru, some tributaries of the Amazon River, as well as downstream to the estuary in the Atlantic. It is named after the Swiss-American Zoology, zoologist and geologist Louis Agassiz (1807–1873). Description ''Apistogramma agassiziii'' is a small, Sexual dimorphism, sexual dimorphic, and territorial fish. The males are larger, more colorful, and have more prolonged fins compared to females of the species. Body color and fin length are important characteristics during courtship and mating in the breeding seasons where larger males are more likely to control better quality territory and have more access to food. The larger and more colorful males are preferred by buyers of ornamental fish. Both males and females undergo four developmental phases of gonad maturation: immature, developing, spawning capable, and regressing. Matu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apistogramma Hongsloi
''Apistogramma hongsloi'' is a species of dwarf cichlid fish, native to the Orinoco basin in South America. They are often kept in the aquariums and prefer to have soft, acidic water. Characteristics It is one of the more colorful ''Apistogramma'' species in some of its color forms, which are the result of selective breeding by aquarists. The male has brighter colors than the female. The wild forms are infrequently seen in the aquarium trade, as they are not as colorful as the selectively bred strains. The wild forms are dark yellowish-brown in the dry season, but in the rainy season where they breed, their colors become brighter, including the red spot at the base of the tail. Range and habitat This dwarf cichlid is found in the Orinoco basin in South America: along the middle Orinoco River, in the Vichada River drainage and the middle Meta River. They typically live in small, slow-moving spring-fed streams that receive plenty of sunlight, have a pH below 5 and a temperature be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apistogramma Cacatuoides
''Apistogramma cacatuoides'' or the cockatoo dwarf cichlid is a South American cichlid and the ''Apistogramma'' species most commonly bred in captivity. Characteristics The male cockatoo dwarf cichlid reaches a body length of 8 centimetres. The female is considerably smaller, reaching only 5 centimetres. The body shape is long and of middle height and the mouth is rather big with thick lips. The male is more colorful than the female, usually with red/orange dorsal and caudal fins. The leading 3 or 4 hard lepidotrichia, rays are elongated, and the ventral fins are clear. In color, the female is quite dull but with a clear black line running along her flanks. Her background color is a pale yellow, but this will become vibrant when mating or brood protecting. In addition, she lacks the elongated dorsal rays of the male and her ventral fins show a black leading edge. There are several color forms which naturally occur in the wild; these include blues, yellows and some reds. Becaus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apistogramma Macmasteri
''Apistogramma macmasteri'' is a dwarf cichlid in the tribe Geophagini, one of the tribes of the subfamily of American cichlids, the Cichlinae. It is a freshwater fish that lives in the rivers Guaytiquía and Metica in the Meta River system. The Meta river system is a part of the Orinoco basin in Colombia. They live in areas with soft sandy bottom and plenty of dead roots and branches in the water. Plants are uncommon in areas where ''Apistogramma macmasteri'' is found. They grow up to in total length. Fish keepers have selectively bred variants with brighter colors than those found in the wild. It is possible that some of these are crossbred with '' Apistogramma viejita''. The author, Sven O. Kullander honoured the cichlid aquarist Mark McMaster with the specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cichlidae
Cichlids () are a large, diverse, and widespread family of percomorph fish in the family Cichlidae, order Cichliformes. At least 1,760 species have been scientifically described, making it one of the largest vertebrate families, with only the Cyprinidae being more speciose. New species are discovered annually, and many species remain undescribed. The actual number of species is therefore unknown, with estimates varying between 2,000 and 3,000. They are native to the Neotropics, Africa (including Madagascar), the Middle East, and the Indian subcontinent, although some species have been introduced worldwide. Many cichlids, particularly tilapia, are important food fishes, while others, such as the '' Cichla'' species, are valued game fish. The family also includes many popular freshwater aquarium fish kept by hobbyists, including the angelfish, oscars, and discus. Cichlids have the largest number of endangered species among vertebrate families, most in the haplochrom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwarf Cichlid
Dwarf cichlid is a term used by fishkeeping hobbyists to describe an arbitrary assemblage of small-sized fish from the family Cichlidae. Although the grouping is widely used in the aquarium industry and hobby, the grouping has no taxonomic or ecological basis and is poorly defined.Linke H, Staeck L (1994) ''American cichlids I: Dwarf Cichlids. A handbook for their identification, care and breeding.'' Tetra Press. Germany. Though dwarf cichlids are by definition small-sized cichlids, there is no accepted maximum length of a dwarf-sized cichlid. Some authors suggest a maximum of 10 centimetres (3.9 in.), while other suggest a maximum length of 12 centimetres (4.7 in.).Richter H-J (1989) ''Complete Book of Dwarf Cichlids.'' Tropical Fish Hobbyist, USA The term is most frequently used to describe small South American or West African species which are suitable for soft, acidic ( pH 4 to 7) densely planted aquariums, however, some aquarists and authors include within this "dwarf cichli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Tate Regan
Charles Tate Regan (1 February 1878 – 12 January 1943) was a British ichthyology, ichthyologist, working mainly around the beginning of the 20th century. He did extensive work on fish classification schemes. Born in Sherborne, Dorset, he was educated at Derby School and Queens' College, Cambridge and in 1901 joined the staff of the Natural History Museum, London, Natural History Museum, where he became Keeper of Zoology, and later director of the entire museum, in which role he served from 1927 to 1938. Regan was elected Fellow of the Royal Society in 1917. Regan mentored a number of scientists, among them Ethelwynn Trewavas, who continued his work at the British Natural History Museum. Taxon described by him *See :Taxa named by Charles Tate Regan Among the species he described is the Siamese fighting fish (''Betta splendens''). In turn, a number of fish species have been named ''regani'' in his honour: Taxon named in his honor *A Thorny Catfish ''Anadoras regani'' (Stein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Least Concern
A least-concern species is a species that has been evaluated and categorized by the International Union for Conservation of Nature (IUCN) as not being a focus of wildlife conservation because the specific species is still plentiful in the wild. They do not qualify as threatened, near threatened, or (before 2001) conservation dependent. Species cannot be assigned the "Least Concern" category unless they have had their population status evaluated. That is, adequate information is needed to make a direct, or indirect, assessment of its risk of extinction based on its distribution or population status. Evaluation Since 2001 the category has had the abbreviation "LC", following the IUCN 2001 Categories & Criteria (version 3.1). Before 2001 "least concern" was a subcategory of the " Lower Risk" category and assigned the code "LR/lc" or lc. Around 20% of least concern taxa (3261 of 15,636) in the IUCN database still use the code "LR/lc", which indicates they have not been re- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selectively Bred
Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together. Domesticated animals are known as breeds, normally bred by a professional breeder, while domesticated plants are known as varieties, cultigens, cultivars, or breeds. Two purebred animals of different breeds produce a crossbreed, and crossbred plants are called hybrids. Flowers, vegetables and fruit-trees may be bred by amateurs and commercial or non-commercial professionals: major crops are usually the provenance of the professionals. In animal breeding artificial selection is often combined with techniques such as inbreeding, linebreeding, and outcrossing. In plant breeding, similar methods are used. Charles Darwin discussed how selective breeding had been success ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexually Dimorphic
Sexual dimorphism is the condition where sexes of the same species exhibit different Morphology (biology), morphological characteristics, including characteristics not directly involved in reproduction. The condition occurs in most dioecy, dioecious species, which consist of most animals and some plants. Differences may include secondary sex characteristics, size, weight, color, markings, or behavioral or cognitive traits. Male-male reproductive competition has evolved a diverse array of sexually dimorphic traits. Aggressive utility traits such as "battle" teeth and blunt heads reinforced as battering rams are used as weapons in aggressive interactions between rivals. Passive displays such as ornamental feathering or song-calling have also evolved mainly through sexual selection. These differences may be subtle or exaggerated and may be subjected to sexual selection and natural selection. The opposite of dimorphism is ''monomorphism'', when both biological sexes are phenotype, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Length
Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the Glossary of ichthyology#H, hypural plate. This measurement excludes the length of the caudal fin, caudal (tail) fin. Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. Standard length measurements are used with Teleostei (most Actinopterygii, bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes (lampreys) and usually Elasmobranchii (shark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaf Litter
Plant litter (also leaf litter, tree litter, soil litter, litterfall, or duff) is dead plant material (such as leaves, bark, needles, twigs, and cladodes) that has fallen to the ground. This detritus or dead organic material and its constituent nutrients are added to the top layer of soil, commonly known as the litter layer or O-horizon ("O" for "organic"). Litter is an important factor in ecosystem dynamics, as it is indicative of ecological productivity and may be useful in predicting regional nutrient cycling and soil fertility. Characteristics and variability Litterfall is characterized as fresh, undecomposed, and easily recognizable (by species and type) plant debris. This can be anything from leaves, cones, needles, twigs, bark, seeds/nuts, logs, or reproductive organs (e.g. the stamen of flowering plants). Items larger than 2 cm diameter are referred to as coarse litter, while anything smaller is referred to as fine litter or litter. The type of litterfall is m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
