Teleost
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Teleostei
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The Teleosts are by far the largest infraclass, the Teleostei, in the class Actinopterygii, the ray-finned fishes. The name is derived from Greek (teleios, "complete" + osteon, "bone"). This diverse group, which arose in the Triassic period,[1] includes 26,840 extant species in about 40 orders and 448 families; most living fishes are members of this group.[3] The other two infraclasses are the Holostei (bowfins and garfish) and the paraphyletic Chondrostei (sturgeons and reedfish).[4]
Contents
Diversity
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With over 25,000 species of teleosts, few groups of vertebrates have undergone such an extensive radiation. These fish are found in almost every aquatic environment and have developed specialisations to feed in a variety of ways as carnivores, herbivores, filter feeders and parasites.[5] The longest teleost is the giant oarfish, with fish of 7.6 m (25 ft) and more having been reported,[6] but this is dwarfed by the extinct Leedsichthys, one individual of which has been estimated to have a length of 27.6 m (91 ft).[7] The heaviest teleost is believed to be the ocean sunfish, with a specimen landed in 2003 having an estimated weight of 2.3 metric tons,[8] while the smallest fully mature adult is the male anglerfish Photocorynus spiniceps which can measure just 6.2 mm (0.24 in).[6]
Open water fish are usually streamlined like torpedoes to minimise turbulence as they move through the water. Reef fish live in a complex, relatively confined underwater landscape and for them, manoeuvrability is more important than speed and many such have developed bodies which optimize their ability to dart and change direction. Many have laterally compressed bodies allowing them to fit into fissures and swim through narrow gaps; some use their pectoral fins for locomotion and others undulate their dorsal and anal fins.[9] Some fish have grown dermal appendages for camouflage; the prickly leather-jacket is almost invisible among the seaweed it resembles and the tassled scorpionfish invisibly lurks on the seabed ready to ambush prey. Some like the foureye butterflyfish have eyespots to startle or deceive, while others such as lionfish have aposometic coloring to warn that they are toxic or have venomous spines.[10]
Some teleosts are migratory; certain fresh water species move within river systems on an annual basis; other species are anadromous, spending their lives at sea and moving inland to spawn, salmon and striped bass being examples. Others, exemplified by the eel, are catadromous, doing the reverse.[11] The fresh water European eel (Anguilla anguilla) migrates across the Atlantic Ocean as an adult to breed in floating seaweed in the Sargasso Sea. The adults spawn here then die, but the developing young are swept by the Gulf Stream towards Europe. By the time they arrive they are small fish and enter estuaries and ascend rivers, overcoming obstacles in their path to reach the streams and ponds where they spend their adult lives.[12]
Some teleosts are parasites. Remoras have their front dorsal fins modified into large suckers with which they cling onto a host animal such as a whale, turtle, shark or ray, but this is probably a commensal rather than parasitic arrangement because both remora and host benefit from the removal of ectoparasites and loose flakes of skin.[13] More harmful are the catfish that enter the gill chambers of fish and feed on their blood and tissues. The cuckoo catfish introduces its eggs into the buccal cavity of a mouth-brooding cichlid and its developing larvae are cared for by their host, consuming their host's young in the process.[14] The snubnosed eel, though usually a scavenger, sometimes bores into the flesh of a fish, and has been found inside the heart of a shortfin mako shark.[15]
Teleosts such as carp (Cyprinidae) developed some unique adaptations. One is the Weberian apparatus, an arrangement of bones (Weberian ossicles) connecting the swim bladder to the inner ear. This enhances their hearing, as sound waves make the bladder vibrate, and the bones transport the vibrations to the inner ear. They also developed a chemical alarm system; when a fish is injured, the warning substance gets in the water, alarming nearby fish.[16]
Some species, such as electric eels can produce powerful electric currents, strong enough to stun prey. Other fish such as knifefish generate weak oscillating electric fields to detect their prey; they swim with straight backs to avoid distorting their electric fields. These currents are produced by modified muscle or nerve cells.[16]
Flatfish are demersal fish that show a greater degree of asymmetry than any other vertebrates. The larvae are at first bilaterally symmetrical but they undergo metamorphosis during the course of their development, with one eye migrating to the other side of the head, and they simultaneously start swimming on their side. This has the advantage that when they lie on the seabed, both eyes are on top, giving them a broad field of view. The upper side is usually speckled and mottled for camouflage, while the underside is pale.[17]
Evolution and phylogeny
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External relationships
The oldest teleost fossils date back to the late Triassic, evolving from fish related to the bowfins in the clade Holostei. During the Mesozoic and Cenozoic they diversified, and as a result, 96% of all known fish species are teleosts. The cladogram shows the relationship of the teleosts to other bony fish,[18] and to the terrestrial vertebrates (tetrapods) that evolved from a related group of fish.[19][20] The former "Chondrostei" is seen to be paraphyletic. Approximate dates are from Near et al, 2012.[18]
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Internal relationships
The phylogeny of the teleosts has been subject to long debate, without consensus on either their phylogeny or the timing of the emergence of the major groups before the application of modern DNA-based cladistic analysis. Near et al (2012) explored the phylogeny and divergence times of every major lineage, analysing the DNA sequences of 9 unlinked genes in 232 species. They obtained well-resolved phylogenies with strongly supported node values. They calibrated the branching times in this tree against 36 reliable measurements of absolute time from the fossil record.[18] The teleosts are divided into the major clades shown on the cladogram, with dates, following Near et al.[18]
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Distribution
Teleosts are found world-wide and in most aquatic environments, including warm and cold seas, flowing and still freshwater, even, in the case of the desert pupfish, isolated and sometimes hot and saline bodies of water in deserts.[21][22] Teleost diversity becomes low at extremely high latitudes; at Franz Josef Land, up to 82°N, ice cover and water temperatures below zero Celsius for a large part of the year limit the number of species; 75% are endemic to the Arctic.[23]
Of the major groups of teleosts, the Elopomorpha (eels), Clupeomorpha (herrings) and Percomorpha (perches, tunas and many others) all have a worldwide distribution and are mainly marine; the Ostariophysi (carps and catfishes) and Osteoglossomorpha (elephantfishes) are worldwide but mainly freshwater, the latter mainly in the tropics; and the Atherinomorpha (guppies, etc) have a worldwide distribution, both fresh and salt, but are surface-dwellers. In contrast, the Esociformes (pikes) are limited to freshwater in the Northern hemisphere, while the Salmoniformes (salmon, trout) are found in both Northern and Southern temperate zones in freshwater, some species migrating to and from the sea. The Paracanthopterygii (cods, etc) are Northern hemisphere fish, with both salt and freshwater species.[22]
Teleosts including the brown trout and the scaly osman are found in mountain lakes in Kashmir at altitudes as high as 3819 metres.[24] Teleosts are found at extreme depths in the oceans; the hadal snailfish has been seen at a depth of 7700 metres, and a related species has been seen at 8145 metres.[25][26]
Anatomy
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The defining features of the teleosts are mobile premaxilla, elongated ural neural arches at the caudal fin and unpaired basibranchial toothplates.[27] The mobile premaxilla is unattached to the braincase; it plays a role in protruding the mouth and creating a circular opening. This lowers the pressure inside the mouth, sucking the prey inside. The lower jaw and maxilla are then pulled back to close the mouth, and the fish is able to grasp the prey. By contrast, mere closure of the jaws would risks pushing food out of the mouth. In more advanced teleosts, the premaxilla is enlarged and has teeth, while the maxilla is toothless. The maxilla functions to push the both the premaxilla and the lower jaw forward. To open the mouth, an adductor muscle pulls back the top of the maxilla, pushing the lower jaw forward. In addition, the maxilla rotates slightly, which pushes forward a bony process that interlocks with the premaxilla.[28]
The pharyngeal jaws of teleosts are composed of five branchial arches. The first three arches are include a single basibranchial surrounded by two hypobranchials, ceratobranchials, epibranchials and pharyngobranchials. The median basibranchial is covered by a toothplate. The fourth arch is composed of pairs of ceratobranchials and epibranchials and possibly some pharyngobranchials and a basibranchial. The base of the lower pharyngeal jaws is formed by the 5th ceratobranchials while the 2nd, 3rd and 4th pharyngobranchials create the base of the upper. In lower teleosts, the pharyngeal jaws consist of well-separated thin parts that attach to the neurocranium, pectoral girdle, and hyoid bar. Their function is limited to merely transporting food and they rely mostly on lower pharyngeal jaw activity. In more advanced teleosts. the jaws are more powerful with left and right ceratobranchials fusing to become one lower jaw. The pharyngobranchials fuse to create to create two large upper jaws that articulate with the neurocranium. They have also developed a muscle that allows the pharyngeal jaws to have a role in chewing food in addition to transporting it.[29]
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1. operculum 2. lateral line 3. dorsal fin 4. adipose fin
5. caudal peduncle 6. caudal fin, 7. anal fin, 8. photophores
9. pelvic fins, 10. pectoral fins
The caudal fin is homocercal, meaning the upper and lower lobes are about equal in size. The spine ends at the caudal peduncle, distinguishing this group from those in which the spine extends into the upper lobe of the caudal fin, such as most fish from the Paleozoic.[28] The neural arches are elongated and fused to form uroneurals which provide support for this upper lobe.[28] In general, teleosts tend to be quicker and more flexible then more basal bony fishes. Their skeletal structure has evolved towards greater lightness. While teleost bones are well calcified, they are constructed from a scaffolding of struts, rather than the dense cancellous bones of holostean fish. In addition, the lower jaw of the teleost is reduced to just three bones; the dentary, the angular bone and the articular bone.[30]
Physiology
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Respiration
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The major means of respiration in teleosts, as in some other fish, is the transfer of gases over the surface of the gills as water is drawn in through the mouth and pumped out through the gills. Apart from the swimbladder, which contains a small amount of air, the body does not have oxygen reserves, and respiration needs to be continuous over the fish's life. Some teleosts exploit habitats where the oxygen availability is low, such as stagnant water or wet mud; they have developed accessory tissues and organs to support gas exchange in these habitats.[31]
Several genera of teleosts have independently developed air-breathing capabilities, and some have become amphibious. Some combtooth blennies emerge to feed on land, and like freshwater eels are able to absorb oxygen through damp skin. Mudskippers can remain out of water for considerable periods, exchanging gases through skin and mucous membranes in the mouth and pharynx. Swamp eels have similar well-vascularised mouth-linings, and can remain out of water for days and even aestivate in mud.[32] The anabantoids have developed an accessory breathing structure known as the labyrinth organ on the first gill arch and this is used for respiration in air, and airbreathing catfish have a similar suprabranchial organ. Certain other catfish, such as the Loricariidae, are able to respire through air held in their digestive tracts.[33]
Sensory systems
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Teleosts possess highly developed sense organs. Nearly all daylight fish have color vision at least as good as a human's. Many fish also have chemoreceptors responsible for acute senses of taste and smell. Most fish have sensitive receptors that form the lateral line system, which detects gentle currents and vibrations, and senses the motion of nearby fish and prey.[34] Fish sense sounds in a variety of ways, using the lateral line, the swim bladder and in some species the Weberian organ. Fish orient themselves using landmarks, and may use mental maps based on multiple landmarks or symbols. Experiments with mazes show that fish possess spatial memory and visual discrimination.[35]
Osmoregulation
The skin of a teleost is largely impermeable to water and the main interface between the fish's body and its surroundings is the gills. In freshwater, teleost fish gain water across their gills by osmosis while in seawater, they lose it. Similarly, salts diffuse outwards across the gills in freshwater and inwards in salt water. The European flounder spends most of its life in the sea but often migrates into estuaries and rivers. In the sea it can gain in an hour, Na+ ions equivalent to 40% of its total free sodium content, with 75% of this entering through the gills and the remainder through drinking. By contrast, in rivers there is an exchange of just 2% of the body Na+ content per hour. As well as being able to selectively limit salt and water exchanged by diffusion, there is an active mechanism across the gills for the elimination of salt in sea water and its uptake in fresh water.[36]
Thermoregulation
Fish are cold-blooded and in general, their body temperature is the same as that of their surroundings. They gain and lose heat through their skin and during respiration and are able to regulate their circulation in response to changes in water temperature by increasing or reducing the blood flow to the gills. Metabolic heat generated in the muscles or gut is quickly dissipated through the gills, with blood being diverted away from the gills during exposure to cold.[37] Because of their relative inability to control their blood temperature, most teleosts can only survive in a small range of water temperatures.[38]
Tuna and other fast-swimming ocean-going fish maintain their muscles at higher temperatures than their environment for efficient locomotion.[39] Tuna achieve muscle temperatures 10°C (19°F) or even higher above the surroundings by having a counterflow system in which the metabolic heat produced by the muscles and present in the venous blood, pre-warms the arterial blood before it reaches the muscles. Other adaptations of tuna for speed include a streamlined, spindle-shaped body, fins designed to reduce drag,[39][40] and muscles with a raised myoglobin content, which gives these a reddish color and makes for a more efficient use of oxygen.[41] In polar regions and in the deep ocean, where the temperature is a few degrees above zero, some large fish, such as the swordfish, marlin and tuna, have a heating mechanism which raises the temperature of the brain and eye, giving them significantly better vision than their cold-blooded prey.[42]
Buoyancy
The body of a teleost is denser than water, so fish must compensate for the difference or they will sink. Many teleosts have a swim bladder that adjusts their buoyancy through manipulation of gases to allow them to stay at the current water depth, or ascend or descend without having to waste energy in swimming. In the more primitive groups like some minnows, the swim bladder is open to the esophagus and doubles as a lung. It is often absent in fast swimming fishes such as the tuna and mackerel. In fish where the swim bladder is closed, the gas content is controlled through the rete mirabilis, a network of blood vessels serving as a countercurrent gas exchanger between the swim bladder and the blood.[43] The "Chondrostei" such as sturgeons also have a swim bladder, but this appears to have evolved separately: other Actinopterygii such as the bowfin and the bichir do not have one, so swim bladders appear to have arisen twice, and the teleost swim bladder is not homologous with the chondrostean one.[44]
Locomotion
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A typical teleost fish has a streamlined body for rapid swimming, and locomotion is generally provided by a lateral undulation of the hindmost part of the trunk and the tail, propelling the fish through the water.[45] There are many exceptions to this method of locomotion, especially where speed is not the main objective; among rocks and on coral reefs, slow swimming with great manoeuvrability may be a desirable attribute.[46] Living among seagrasses and algae, the seahorse adopts an upright posture and moves by fluttering its pectoral fins, and the closely-related pipefish moves by rippling its elongated dorsal fin. Gobies "hop" along the substrate, propping themselves up and propelling themselves with their pectoral fins. In some species, a pelvic sucker allows them to climb, and the Hawaiian freshwater goby climbs waterfalls while migrating.[47] Gurnards have three pairs of free rays on their pectoral fins which have a sensory function but on which they can walk along the substrate.[48] Flying fish launch themselves into the air and can glide on their enlarged pectoral fins for hundreds of metres.[49]
Reproduction and lifecycle
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Most teleost species have external fertilisation; both eggs and sperm are released in the open for fertilisation. internal fertilisation, which is more typically for Chondrichthyes and many vertebrates, occurs in 500–600 species of teleosts. This involves the male inseminating the female with an intromittent organ.[50] There are two major reproductive strategies of teleosts; semelparity and iteroparity. In the former, a individual breeds once after reaching maturity and then dies. This is because, the physiological changes that come with reproduction eventually lead to death.[51] Salmon (Oncorhynchus) are well known for this. These species hatch in fresh water and then travel to sea for up to 4 years before travelling back to their place of birth where they spawn and die. Semelparity is also known to occur in some eels and smelts. The majority of teleost species, however, have iteroparity, where mature individuals can breed multiple times in their life.[52]
Sex identity and determination
The majority (88%) of teleost species are gonochoristic, having individuals that remain either male or female throughout their adult lives. The sex of an individual can be determined genetically as in birds and mammals, or enviromentally as in reptiles. In some teleosts, both genetics and the environment play a role in determining sex.[53] For species whose sex is determined by genetics, it can come in three forms. In monofactorial sex determination, a single-locus determines sex inheritance. Both the XY sex-determination system and ZW sex-determination system exist in teleost species. Some species, such as the southern platyfish (Xiphophorus maculatus), have both systems and a male can be determined by XY or ZZ depending on the population.[54] Multifactorial sex determination occurs in numerous neotropical species and involves both XY and ZW systems. Multifactorial systems, involve rearrangements of sex chromosomes and autosomes. For example the darter characine (Apareiodon affinis) has a ZW multifactorial system where the female is determined by ZW1W2 and the male by ZZ. Hoplias malabaricus has a XY multifactorial system where females are determined by X1X1X2X2 and the male by X1X2Y.[55] Some teleosts, such as zebrafish (Danio rerio) have a polyfactorial system, where there are several genes which play a role in determining sex.[56] Environment-dependent sex determination has been documented in at least 70 species of teleost. temperature is the main factor but PH levels, growth rate, density and social environment may also play a role. For the Atlantic silverside (Menidia menidia), spawning in colder waters creates more females, while warmer waters create more males.[57]
Hermaphroditism
Some teleost species are hermaphroditic, which can come in two forms; simultaneous and sequential. In the former, both spermatozoa and egg gamete are present in the gonads. Simultaneous hermaphroditism typically occurs in species that live in the ocean deeps, where potenial mates are sparsely dispersed.[58][59] Self-fertilisation is rare and has only been recorded in two species the Kryptolebias marmoratus and Kryptolebias hermaphroditus.[59] With sequential hermaphroditism, individuals may function as one sex early in their adult life and switch later in life. Species with this condition include parrotfish, wrasses, sea basses, flatheads, sea breams and lightfishes.[58] Protandry is when an individual starts out male and becomes female while the reverse is protogyny, the latter is more common. Changing sex can occur in various contexts. In the bluestreak cleaner wrasse (Labroides dimidiatus), where males have harems of up to ten females, if the male is removed the largest and most dominant female will develop male-like behaviour and eventually testes. If she is removed, the next ranking female takes her place. In the species Anthias squamipinnis, where individuals gather into large groups and females greatly outnumber males, if a certain number of males are removed from a group, the same number of females will change sex and replace them. In clownfish, individuals live in groups and only the two largest in a group breed; the largest female and the largest male. If the female dies, the male will switch sexes and the next largest male will take his place.[60]
Mating tactics
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There are several different mating system among teleosts. Some species are promiscuous, where both males and females breed with multiple partners and there are no obvious mate choices. This has been recorded in Baltic herring, guppies, Nassau groupers, humbug damselfish (Dascyllus melanurus), cichlids and creole wrasses. Polygamy, where one sex has multiple partners can come in many forms. Polyandry consists of one adult female breeding with multiple males, who only breed with that female. This is rare among teleosts, and fish in general. One notable examples are the clownfish. In addition, it may also exist to an extent among anglerfish, where some females have more than one male attached to them. Polygyny, where one male breeds with multiple females, is much more common. This is recorded in sculpins, sunfish, darters, damselfish and cichlids where multiple females may visit a territorial male that will guard and take care of eggs and young. Polygyny may also involve a male guarding a harem of several females. This occurs in coral reef species, such as damselfishes, wrasses, parrotfishes, surgeonfishes, triggerfishes and tilefishes. Lek breeding, where males congregate to display to females, has been recorded in at least one species Cyrtocara eucinostomus. Lek-like breeding system have also been recorded in several other species. In monogamous species, males and female may form pair bonds and breed exclusively with their partners. This occurs in North American freshwater catfishes, many butterflyfishes, sea horses and several other species.[61] Courtship in teleosts plays a role in species recoginition, strengthening pair bonds, spawning site position and gamete release synchronization. This includes colour changes, sound production and visual displays (fin erection, rapid swimming, breaching), which is often done by the male. Courtship may be done by female to overcome a territorial male that would otherwise drive her away.[62]
Sexual dimorphism exists in some species. Individuals of one sex, usually males will developed secondary sexual characteristics that increase their chances of reproductive success. In dolphinfish (Coryphaena), males have larger and blunter heads than females. In several minnow species, male develop swollen heads and small bumps known as breeding tubercles during the breeding season.[63] The male green humphead parrotfish (Bolbometopon muricatum) has a more well-developed forehead with "ossified ridge" which plays a role in ritualised headbutting.[64] Dimorphism can also take the form of colouration differences. Again, it is usually the males that are brightly coloured; in killifishes, rainbowfishes and wrasses the colours are permanent while in species like minnows, sticklebacks, darters and sunfishes, the colour changes with seasons. These colourations can be very conspicuous to predators which shows that the drive to reproductive can be stronger than predation avoidance.[63]
Males have have been unable to successfully court a female may try to achieve reproductive success in other ways. In sunfish species like the bluegill (Lepomis macrochirus) where larger, older males known as parental males which have successfully courted a female and construct nests for the eggs they fertilise, smaller satellite males will mimic female behaviour and colouration to access a nest so they can fertilise the eggs. Other males, known as sneaker males, lurk nearby and then quickly dash to the nest and fertilise on the run. These males are smaller than satellite males. Sneaker males also exist in Oncorhynchus salmon, where small males that where unable to establish a position near a female will dash in while the large dominant male is spawning with the female.[65]
Spawning sites and parental care
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Development
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Shoaling and schooling
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Many teleosts form shoals, which serve multiple purposes in different species. Schooling is sometimes an antipredator adaptation, offering improved vigilance against predators. It is often more efficient to gather food by working as a group, and individual fish optimise their strategies by choosing to join or leave a shoal. When a predator has been noticed, prey fish respond defensively, resulting in collective shoal behaviors such as synchronised movements. Responses do not consist only of attempting to hide or flee; antipredator tactics include for example scattering and reassembling. Fish also aggregate in shoals to spawn.[66]
Importance to humans
Teleost fishes are economically important in different ways. They are captured for food around the world. They provide a large proportion of the fish caught for sport.[67]
A small number of productive species including carp, salmon,[68] tilapia and catfish are farmed commercially, producing millions of tons of protein-rich food per year. Production is expected to increase sharply so that by 2030, perhaps 62 percent of food fish will be farmed.[69]
Some smaller and more colorful species serve as aquarium specimens and pets. Wolf fish are used in the leather industry. Isinglass is made from thread fish and drum fish.[67]
A few teleosts are dangerous. Some like the electric eel and the electric catfish can give a severe electric shock. Others such as the Piranha and barracuda have a powerful bite and have sometimes attacked human bathers.[67]
Medaka and zebrafish are used as research models for studies in genetics and developmental biology; the zebrafish is the most commonly used laboratory vertebrate.[67]
In art
Teleost fishes have been frequent subjects in art, reflecting their economic importance, for at least 14,000 years. Fish patterns were common in Ancient Egypt, acquiring mythological significance in Ancient Greece and Rome, and from there into Christianity as a religious symbol. Fishes became common in Renaissance art, with still life paintings reaching a peak of popularity in the Netherlands in the 17th century. Fish imagery however remained frequent into the 20th century, different artists such as Klee, Magritte, Matisse and Picasso expressing radically different themes from attractive to violent. In contrast, artists in China and Japan use fish images symbolically.[70]
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Wall painting of fishing, Tomb of Menna the scribe, Thebes, Ancient Egypt, c. 1422–1411 BC
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Italian Renaissance: Fish, Antonio Tanari, c. 1610–1630, in the Medici Villa, Poggio a Caiano
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Dutch Golden Age painting: Fish Still Life with Stormy Seas, Willem Ormea and Abraham Willaerts, 1636
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Mandarin Fish by Bian Shoumin, Qing Dynasty, 18th century
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Fish Magic, Paul Klee, oil and watercolour varnished, 1925
Notes
- ↑ Thus the former "Chondrostei" is not a clade, but is broken up.
References
- ↑ 1.0 1.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ "The Paleobiology Database." The Paleobiology Database. N.p., n.d. Web. 14 June 2013. <http://paleodb.org/?a=basicTaxonInfo&taxon_no=202677>.
- ↑ Miller, Stephen, and John P. Harley. Zoology, Seventh Edition, pg 297. McGraw-Hill Higher Education. New York, 2007.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 16.0 16.1 Helfman, Collete, Facey and Bowen pp. 268–74
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 18.0 18.1 18.2 18.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Dudek and ICF International (2012). Desert Renewable Energy Conservation Plan (DRECP) Baseline Biology Report. California Energy Commission.
- ↑ 22.0 22.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Morelle, Rebecca. 'Deepest ever' living fish filmed BBC News 2008
- ↑ Morelle, Rebecca. New record for deepest fish BBC News 19 Dec 2014
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 28.0 28.1 28.2 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 39.0 39.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Wotton and Smith p. 56.
- ↑ Wotton and Smith p. 55.
- ↑ Helfman, Collete, Facey and Bowen p. 457
- ↑ Wotton and Smith p. 53.
- ↑ Wotton and Smith p. 71–80.
- ↑ Wotton and Smith p. 81–82.
- ↑ Wotton and Smith p. 82–83.
- ↑ Wotton and Smith p. 83–85.
- ↑ 58.0 58.1 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 59.0 59.1 Wotton and Smith p. 54.
- ↑ Helfman, Collete, Facey and Bowen p. 458
- ↑ Helfman, Collete, Facey and Bowen p. 457
- ↑ Helfman, Collete, Facey and Bowen p. 465
- ↑ 63.0 63.1 Helfman, Collete, Facey and Bowen p. 463
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Helfman, Collete, Facey and Bowen p. 473
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ 67.0 67.1 67.2 67.3 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
Bibliography
- Lua error in package.lua at line 80: module 'strict' not found.
| About fish |
 |
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|---|---|---|---|---|---|
| Anatomy and physiology |
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| Sensory systems |
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| Reproduction | |||||
| Locomotion | |||||
| Other behaviour |
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| Habitats | |||||
| Other types | |||||
| Commercial |
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| Major groups | |||||
| Lists | |||||
