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Prionurus Biafraensis
''Prionurus biafraensis'', the Biafra doctorfish, is a species of marine ray-finned fish belonging to the family Acanthuridae, the surgeonfishes, unicornfishes and tangs. This fish is found in the eastern Atlantic Ocean. Taxonomy ''Prionurus biafraensis'' was first formally described as ''Xesurus biafraensis'' in 1962 by the French zoologists Jacques Blache and Martial Rossignol with its type locality given as Pointe de Prayao, on São Tomé Island in the Gulf of Guinea. The genus ''Prionurus'' is the only genus in the tribe Prionurini which is one of three tribes in the subfamily Acanthurinae which is one of two subfamiles in the family Acanthuridae. Etymology ''Prionurus biafrensis'' has a specific name, ''biafrensis'' which means "of Biafra", a reference to the type locality being in the Bight of Biafra in the Gulf of Guinea. Description ''Prionurus biafrensis'' has a deep, oblong and compressed body with its deepest part fitting into its standard length 1.8 times. The sn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacques Blache
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Acanthurinae
''Acanthurinae'' is a subfamily of marine ray-finned fishes belonging to the Family (biology), family Acanthuridae, found in the Indo-Pacific and the tropical Atlantic. These fishes commonly have the English names surgeonfishes or tangs. Taxonomy Acanthurinae is the nominate subfamily of the family Acanthuridae which was proposed by the French zoologist Charles Lucien Bonaparte in 1835. The 5th edition of ''Fishes of the World'' recognises 3 Tribe (biology), tribes within the subfamily, the Acanthurini, Prionurini and Zebrasomoni. The other subfamily in the Acanthuridae is the monogeneric Nasinae. Tribes and genera Acanthurinae is subdivided into the following tribes and genera: ''FishBase'' list 57 species in the subfamily, with ''Acanthurus'' containing 40 species being the most speciose genus. Characteristics Acanthurini surgeonfishes are characterised by having 3 spines in the anal fin. They also have one or more mobile and flexible spine on the caudal peduncle, this spin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pointe-Noire
Pointe-Noire (; , with the letter d following French spelling standards) is the second largest city in the Republic of the Congo, following the capital of Brazzaville, and an autonomous department and a commune since the 2002 Constitution. Before this date it was the capital of the Kouilou region (now a separate department). It is situated on a headland between Pointe-Noire Bay and the Atlantic Ocean. Pointe-Noire is the main commercial centre of the country and had a population of 1,420,612 inhabitants in 2023. The coat of arms The coat of arms of the city of Pointe-Noire is: ''"Gold at the point of sand accompanied by two silver oars, the handle gules, laid in chevron poured, the tip and oars moving from a sea of azure wavy three streams of silver"'' Administration Pointe-Noire is a commune divided into six urban boroughs (''arrondissements''): * Lumumba, the oldest area. It is the administrative and commercial centre. * Mvoumvou * Tié-Tié * Loandjili * Mongo-Mp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Lopez
Cape Lopez () is a headland on the coast of Gabon, west central Africa. The westernmost point of Gabon, it separates the Gulf of Guinea from the South Atlantic Ocean. Cape Lopez is the northernmost point of a low, wooded island between two mouths of the Ogooué River. There is an oil terminal at the southeast side of the cape, and the seaport of Port-Gentil lies about 10 km southeast of the cape. A lighthouse has existed on the Cape since 1897; the current tower was built in 1911, but has been inactive for many years and is in danger of collapsing from erosion Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, tran .... It is named after the Portuguese explorer Lopes Gonçalves, who reached it circa 1474. In 1602, the Dutch explorer and writer Pieter de Marees published some images of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Total Length
Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including 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 hypural plate. This measurement excludes the length of the 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 bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes ( lampreys) and usually Elasmobranchii (shark Sharks are a group of elasmobranch cartilaginous fish characterized by a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish ( Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish ( Chondrichthyes) and jawless fish ( Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caudal Peduncle
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are predominantl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found in most fish, in mammals such as whales, and in extinct ancient marine reptiles such as ichthyosaurs. Most have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of whales to identify individuals in the field. The bones or cartilages that support the dorsal fin in fish are called pterygiophores. Functions The main purpose of the dorsal fin is usually to stabilize the animal against rolling and to assist in sudden turns. Some species have further adapted their dorsal fins to other uses. The sunfish uses the dorsal fin (and the anal fin Fins are moving appendages protruding from the body of fish that interact with water to ge ... [...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] |
Bight Of Biafra
The Bight of Biafra, also known as the Bight of Bonny, is a bight off the west- central African coast, in the easternmost part of the Gulf of Guinea. This "bight" has also sometimes been erroneously referred to as the "Bight of Africa" because it is at this point where the direction of the Western coastline of the African continent most prominently changes from a North/ South orientation to an East/ West orientation. Geography The Bight of Biafra, between Cape Formosa and Cape Lopez, is the most eastern part of the Gulf of Guinea; it contains the islands Bioko (part of Equatorial Guinea), São Tomé and Príncipe. The name Biafra – as indicating the country – fell into disuse in the later part of the 19th century A 1710 map indicates that the region known as "Biafar" was located in present-day Cameroon. The Bight of Biafra extends east from the River Delta of the Niger in the north until it reaches Cape Lopez in Gabon. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Name (zoology)
In zoological nomenclature, the specific name (also specific epithet, species epithet, or epitheton) is the second part (the second name) within the scientific name of a species (a binomen). The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description. For example, the scientific name for humans is ''Homo sapiens'', which is the species name, consisting of two names: ''Homo'' is the " generic name" (the name of the genus) and ''sapiens'' is the "specific name". Etymology Historically, ''specific name'' referred to the combination of what are now called the generic and specific names. Carl Linnaeus, who formalized binomial nomenclature, made explicit distinctions between specific, generic, and trivial names. The generic name was that of the genus, the first in the binomial, the trivial name was the second name in the binomial, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subfamily
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zoological subfamily names with "-inae". Detarioideae is an example of a botanical subfamily. Detarioideae is a subdivision of the family Fabaceae (legumes), containing 84 genera. Stevardiinae is an example of a zoological subfamily. Stevardiinae is a large subdivision of the family Characidae, a diverse clade In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach t ... of freshwater fish. See also * International Code of Nomenclature for algae, fungi, and plants * International Code of Zoological Nomenclature * Rank (botany) * Rank (zoolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
