General ichthyology

Дата канвертавання17.04.2016
Памер44.85 Kb.

Md.Ariful Alam


Dept. of Fisheries Biology and Genetics










Ichthyology (from Greek, ikhthus, "fish"; and logos, "study") is the branch of zoology devoted to the study of fish. This includes skeletal fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). While a majority of species have probably been discovered and described, approximately 250 new species are officially described by science each year. According to FishBase, 31,500 species of fish had been described by January 2010. There are more fish species than the combined total of all other vertebrates: mammals, amphibians, reptiles and birds.

Fig. Percentage composition by groups of the some 41,600 species of recent vertebrates

Course Description

Study of fishes which include following areas-

  • Classification

  • Anatomy

  • Evolution and genetics

  • Natural history and ecology

  • Physiology and biochemistry

  • Conservation


(Anatomy, from the Greek anatome, meaning "to cut" or "dissect," is the study of pieces)

The branch of science concerned with the bodily structure of humans, animals, and other organisms, esp. as revealed by dissection is called anatomy.

Fish anatomy includes the study of the structure of fishes from microscopic, histological, embryological and comparative points of view.

Course Goals of Ichthyology

Ichthyology encompasses species diversity, natural history, and ecological and evolutionary relationships of fishes.  This course will consist of three major parts: (1) comparative anatomy and physiology of fishes; (2) phylogenetic systematics and a survey of evolutionary lineages of fishes; (3) ecology and conservation of fishes.  More than 24,000 species of fishes have been described from every conceivable aquatic habitat, making it the largest group of vertebrates known.  In this course we will learn about the major evolutionary lineages of fishes, and survey major families of fishes.  We will highlight the remarkable adaptations of fishes through comparative study among evolutionary lineages.  Students will learn about evolutionary processes that shape species diversity, causes of decline and extinction, and ecology and conservation of fishes through examples from the primary literature. 





Enhance understanding of fish biodiversity; pose relevant questions about the production, maintenance, and degradation of fish biodiversity; and seek answers in a foundation built on evolutionary and ecological relationships of fishes.


Course Objectives:

This course provides a general overview of the biology of fishes, including aspects of their evolution, taxonomy, anatomy, physiology, behavior, natural history, ecology, management, and conservation. Each student who completes this course satisfactorily will be understood the concepts and supporting facts associated with the following subjects:

  • Major features of fish external and internal anatomy

  • Modes of fish locomotion

  • How fish sense their environment

  • have a broad understanding of the biology of fishes;

  • be able to identify major taxonomic groups of fishes;

  • be able to identify most local fishes; and

  • Understanding of basic anatomy and physiology of fishes

  • Understanding of the evolution, systematics, and zoogeography of major groups of fishes

Expected Course Outcomes:

  • Demonstrate knowledge concerning the science of ichthyology and its history

  • Demonstrate knowledge in jawless, cartilaginous and bony fish diversity and natural history

  • To describe the form, function, and ontogeny of fishes

  • To understand and describe the taxonomy, phylogeny, and evolution of fishes

  • To understand and describe how fishes are distributed throughout the world and among different habitats

  • To develop skills in fish collection and identification

  • To understand fish diversity from the large variety of body shapes

  • To understand and describe the behavior and ecology of fishes

  • To understand systematic and speciation and different taxonomic methods used in ichthyology

  • To understand how evolution and zoogeography have shaped natural selection of major groups of fishes


Fishes are poikilothermic and cold blooded animals, typically with backbones, gills for respiration, locomotion by paired and unpaired fins and are primarily dependent on water as a medium in which to live.

eg. Rui, catla etc.

Modes of Reproduction: 

  • Ovopartity-- Lay undeveloped eggs, External fertilization (90% of bony fish), Internal fertilization (some sharks and rays)

  • Ovoviviparity- Internal development- without direct maternal nourishment-Advanced at birth (most sharks + rays)-Larval birth (some scorpeaniforms-rockfish)

  • Viviparity- Internal development- direct nourishment from mother-Fully advanced at birth (some sharks, surf perches)

History of Ichthyology


Ichthyology which is the focus of this OPEFE website was confronted with many inadequate descriptions and figures of fishes printed during the over 200 years since records were first kept. The first original observations may be attributed to Pierre Belon (1517-1575) in De aquatilibus libri duo; Hyppolyto Salviana (1514-1572) in Aquatilium animalium histoae...; and Gulielmus Rondelet (1507-1566) in libri de piscibus marinis, whose works are almost entirely limited to Mediterrean and European fishes.The next century, Guilielmus Piso (1611-1678) and George Marcgrav (1610-1644) accompanied Prince Moritz of Nassau (1604-1679) to Brazil in 1637-1644 approximately 100 species of fish. It was about this time John Ray (see above) and Francis Willoughby (1635-1672) and ichthyology flourished.


A Swede by the name of Peter Artedi (1705-1735) surfaced from the University of Uppsala, Sweden. His earliest investigation were more important than others before him. There are those who consider him the father of ichthyology. In 1728 Karl (Latinized as Carolus) Linnaeus visited this university. Linneaus inquired as to who was engaged in the study of natural history and he was then referred to Artedi. That is how they met and became friends. Each helping the other not only in personal money needs but even making an agreement that the survivor would publish the works of the one deceased. Artedi drowned in 1735 in Holland. Linnaeus true to his word published Artedi Ichthyologia in 1738. Artedi method was that he believed that a genus represented a group of species which agreed with each other in general but which differed in minor characters. Having established the generic concept, Artedi proceeded to group the genera into "maniples." This is the same family concept used today. The maniples were arranged into natural orders, and these into a class, representing the whole group of fishes. In all Artedi recognized 47 genera and 230 species. The only weakness in this rating was below the genus. He retained the polynomial scheme of nomenclature. There is no doubt Artedi greatly influenced Linnaeus.


Many more ichthyologic works would follow Artedi and Linnaeus. Some of those names include, Otto Fabricus (1744-1822), Petrus Forskål (1736-1763), Petrus Pallas (1741-1811), Antione Risso (1777-1845), Thomas Pennant (1726-1798), Wlhelm G. Tilesius (1769-1857), Georg Wilhelm Steller (1709-1746). Constantine Samuel Rafinesque (1783-1840), had the dubious distinction of having described and published non-existent animals. This as a result of a friend suggesting the famed bird painter Audobon meet Rafinesque since both shared a passion for natural history. This was during the summer and Rafinesque having impressed Audobon with his knowledge of natural history was invited to spend the night in Audobon's cabin. During the night, Audobon awoke to a commotion in the naturalist room. To his astonishment he saw his guest, running naked, holding the handle of Audobon's favorite Cremona (a violin), the body of which was battered to pieces in attempting to kill bats for examination. Audobon as earlier stated was a noted artist and famous for painting birds. He used this skill to create non-existent animals by placing the head of one and then painting onto the body of another. Perhaps revenge in his heart Audobon gave these paintings to Rafinesque and the naturalist immediately set out in describing these new species. Ten of these were actually published in Ichthyologia Ohiensis.

Marc Elieser Bloch (1723-1799), Bernhard G.E. Lacepède (1756-1825), Georges L. C. F.D. Cuvier (1769-1832) and Achille Valenciennes (1794-1865). The first ichthyologist to publish an actual description can be traced to an American named LeSueur (1821). The species described was Mollinesia latipinna, commonly called the sail-fin Mollie. In those days there was a lot of carelessness in describing and naming new species. Many of the plates used as illustrations contained many errors in spelling, etc. Because the egregious mistake in spelling of Mollinesia was in dispute (the plate illustration had the name misspelled as Molinesia) it took three ichthyologist in the future to investigate and correct the nomenclature error.


The last attempt to write a series of volumes on the fishes of the world was by Albert C.L.G. Günther (1830-1914). This work was entitled Catalogue of the Fishes of the British Museum. It was published in eight volumes from 1859-1870. To many species were being discovered and the task became more complicated. More work than one person could accomplish. The local fauna was by and large greater than what was once thought and could not be worked into the treatise on fishes of the world. The next serious attempt was made by Johann Baptis von Spix (1781-1826) and Louis Aggassiz (1807-1873). This work pertained to Brazilian local fauna and related fishes. Johann Müller (1801-1858) and Friedrich G. J. Henle (1807-1885) produced the first authoritative work on sharks (Systematische Beschriebungen der Plagiostomen) in 1841. Peter Bleeker (1819-1878) published 500 separate contributions, chiefly on the fishes of the tropical Indo-Pacific. His book which was not only fully illustrated, it was one of the best 9 volumes from previous works of other authors. The book name is Atlas Ichthyologique des Indes Orientales Néerlandaises, 1862-1877. The literature from that work is the most accurate and comparable to many literature found today.


Cuba also had a notable ichthyologist by the name of Felipe Poey y Aloy (1799-1891). He labored for over a 50 years on the local fish and fauna. Japan also produced other ichthyologic works by Coenraad Jacob Temminck (1770-1858) and Herman Schlegel (1804-1844). Their work catalogued the fauna and fishes of the Japanese island. There were other ichthyologists from other lands (way to many to list here), but some other notable ones include; Franz Steindachner (1834-1919), George Boulenger (1858-1937), Robert Collett (1842-1913), Carlos Berg (1843-1902), Francis Day (1829-1889), and Leon Louis Vaillant (1834-1915).


American Ichthyology is dated from the feeble beginnings of Rafinesque and from Samuel Latham Mitchill (1764-1831). His work pertained to the treatise on the fishes of New York. Shortly after that Charles Alexander LeSueur (1778-1846) reported on the Great Lakes and Ohio basin. He was an artist and naturalist. Other American ichthyologist surfaced during that period; Jared Potter Kirtland (1793-1877) on Ohio fishes; James Ellsworth DeKay (1792-1851) on the New York fauna; John Richardson (1787-1865), published Fauna boreali-Americana in 1836. Massachusetts also produced an ichthyologist named David Humphreys Storer (1804-1891) who focused his work on the fishes from that state. South Carolina fishes were examined and written about by John Edwards Holbrook (1796-1871).


In 1846, The Smithsonian Institution was created in the city of Washington, D. C. This institution was under the direction of the United States government. This gave a permanent residence to the United States National Museum where specimens could stored and later reviewed by people interested in North American fauna and the fauna found in the world. The U.S. National Museum, Division of Fishes is so large that very little space is available for its multitude of specimen jars exceeding 300,000. This collection belongs to the people of the United States and is available only those students qualified in ichthyologic studies. This collection is very similar to a book library where the student can research past observations and record new ones. The institution is assisted by the U.S. Fish and Wildlife Commission who has a history of systematic ichthyologic leadership in investigations over a century old. Noteworthy contributions can be traced to G. Brown Goode (1851-1896) and his Oceanic Ichthyology; David Starr Jordan (1851-1931) in collaboration with Charles Henry Gilbert (1859-1928) and Barton Warren Evermann (1853-1932) were responsible for publishing over 100 citations on American fishes. Henry W. Fowler (1878-?), Academy of National Sciences in Philadelphia, did many citations on Philippine collections using his on ship called Albatross. Furthermore, Fowler in 1945 and Bailey & Miller in 1950 examined the work by LeSeur amended the name to Mollienesia which closely followed the name of the man it was supposed to honor, LeSueur. This was the first time an examination of ichthyologic review was ever done in order to correct an egregious error in a citation. A volume of fishes in Peru was provided by Samuel Frederick Hildebrand (1883-1949) and that on freshwater fishes of Thailand (then Siam) by Hugh McCormick Smith (1865-1941).

Louis Agassiz (1807-1873) in 1850 wrote a monograph on the fishes of Lake Superior and trained one of his students, Charles Frederic Girard (1822-1895), in ichthyology. Many fish collections and preservations were completed during the United States Pacific Railway surveys which were brought back to Washington. Here Spencer Fullerton Baird (1823-1887) published the survey fauna (mostly from the Western United States) with the assistance of Girard. Baird was one of the secretaries to the Smithsonian Institution during this time. Also engaged in these earlier explorations were James Wood Milner (1841-1879), Marshall McDonald (1835-1895), William O. Ayers (1817-1891), William Neale Lockington (184?-1902), and George Suckley (1830-1869) among others.


Certain American educational institutions (latter half of nineteenth century and early twentieth century) later arose into centers of leadership in the study of fishes and exploration. Harvard University had Samuel Garman (1843-1927). Garmon was a student of Agassiz and he made valuable contributions on the sharks and the deep-sea fishes collected by Albatross. Indiana University became another important research center for fishes under the leadership of David Starr Jordan during the 1880's. He would be then followed by the man whom many would call "the father of characid studies," Carl Eigenmann.


Carl H. Eigenmann (1863-1927) took over and became famous for his valuable contributions on South American fishes. Jordan had trained Eigenmann and inspired his very active ichthyologic career. Eigenmann collaborated in many of Jordan's works and Jordan would later appoint Eigenmann as professor of zoology at Indiana University. Upon Eigenmann's death his successor (Fernandus Payne) praised Eigenmann's researches by stating in his opinion "place him (Eigenmann) in the first rank of ichthyologists of all time." Jordan praised Eigenmann by saying "one of the most eminent workers in the field of systematic zoology and one of the ablest of natural history teachers, withal the most tireless of explorers." Jordan in the meantime left Indiana and took over as first president of Stanford University, California. His leadership in establishing a fish center there is still strong today. When he left Indiana he took with him Charles Henry Gilbert (1859-1928). At Stanford he gathered two important men, John Otterbein Snyder (1867-1943) and Edwin Chapin Starks (1867-1932). For half a century Standford University was the main center for training students in ichthyology. Charles Henry Gilbert was known for his methodical handling of American fishes. His work was primarily on salmon and to apply statistical methods to fishery research. This earned him the title of "the father of modern fisheries biological research in America."


Seth John Meeks (1859-1914) was another of Jordan's students and like Eigenmann revised many early group and regional papers. He largely focused his attention on freshwater fishes of Middle America. Many more followed Jordan's lead and most were his students. George Brown Goode (1851-1896) played an important role in pure and applied ichthyology in the United States. His ichthyology overlapped Jordan, but the two did not publish together. However, they did cooperate effectively. Much of his work was focused on fisheries biology, particularly that of certain commercially important fishes. His research of deep-sea fishes was firmly established since Jordan had no interest in them. Tarleton H. Bean (1846-1916) was an associate of Goode and helped lay out the rational inclusion of deep-sea fishes in the Fishes of North and Middle America. Later Bean's brother Barton A. Bean (1860-1947) followed him as Curator of Fishes in the National Museum. However his reign seemed to be (quoting from Carl L. Hubbs) "less productive and less illustratrious scientific life (during slightly more than the last decade of the nineteenth century and the first two decades of the twentieth)."


Louis Agassiz while in San Francisco picked up another fellow by the name of Samuel Garman (1843-1927) from what was then called "the Wild West." Agassiz trained Garman in ichthyology (both Garman and Jordan were fellow students under Agassiz at Penikese). In addition to publishing a considerable number of minor papers, Garman monographed the "Discoboli" (Cyclopteidae and Liparididae) in 1892, and the Cyprinodontes in 1895. Garmon's work methodical in his attention to the anatomical detail. However, he was never admired nor a member of the Jordan clique. Garmon was indeed a recluse, locking himself into his ill-lit quarters at MCZ. The period 1875-1900 knowledge of fish fauna of the Pacific Coast of the United States flourished. Several incidental studies were conducted by Louis and Alexander Agassiz, Gill, William O. Ayres, James Grahm Cooper (1830-1902), William Gibbons (1812-1897), and a few other lessor known figures. Much of the work reached a standstill during the Pacific Railroad Survey of the 1850's. That is until Jordan and Gilbert carried out their survey in 1880. The collected from British Columbia to San Diego, chiefly fish markets, which then, especially in California, contained a wide variety of inshore fishes.


This were quickly returned to their hotel room where they prepared the fishes for shipment in preservative. Many quick descriptions were done this way with prompt publication following their discovery. These were published in short papers in the Proceedings of the United States National Museum for 1880 and 1881. Never mind, that expediency for correct descriptions was the norm and this would later create problems for ichthyologists to follow. In one situation on a trip to Matzatlán and on two trips to Panamá, in 1881 and 1882, Gilbert made large fish collections that were destroyed by fire. This before a monograph on The Fishes of the Pacific Coast of Tropical America could be written!

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