Contents 1 Description 2 Habitat and distribution 3 Habitat loss and threats 4 Reproduction and parental care 5 Genera 6 Notes 7 References 8 External links

Description[edit] Pipefishes look like straight-bodied seahorses with tiny mouths. The name is derived from the peculiar form of the snout, which is like a long tube, ending in a narrow and small mouth which opens upwards and is toothless. The body and tail are long, thin, and snake-like. They each have a highly modified skeleton formed into armored plating. This dermal skeleton has several longitudinal ridges, so a vertical section through the body looks angular, not round or oval as in the majority of other fishes.[1] A dorsal fin is always present, and is the principal (in some species, the only) organ of locomotion. The ventral fins are consistently absent, and the other fins may or may not be developed. The gill openings are extremely small and placed near the upper posterior angle of the gill cover.[1] Many are very weak swimmers in open water, moving slowly by means of rapid movements of the dorsal fin. Some species of pipefish have prehensile tails, as in seahorses. The majority of pipefishes have some form of a caudal fin (unlike seahorses), which can be used for locomotion.[1] See fish anatomy for fin descriptions. Some species of pipefish have more developed caudal fins, such as the group collectively known as flagtail pipefish, which are quite strong swimmers.[citation needed]

Habitat and distribution[edit] Most pipefishes are marine dwellers; only a few are freshwater species. They are abundant on coasts of the tropical and temperate zones. Most species of pipefish are usually 35–40 cm in length and generally inhabit sheltered areas in coral reefs or seagrass beds.

Habitat loss and threats[edit] Due to their lack of strong swimming ability pipefish are often found in shallow waters that are easily disturbed by industrial runoffs and human recreation. Shoreline are also affected by boats and drag line that move shoreline sediment. These disturbances cause a decrease in seagrasses and eelgrasses that are vital in pipefish habitats. Do to pipefish’s narrow distribution they are unable to adapt to new habitats. Another factor that affects pipefish populations is there use in Chinese medicine remedies. Syngnathidae in general are being used in medicine but pipefish are used for their high potentiates. Aquarium trade of pipefish has also increased in recent years. Local and national fishing restrictions have been put into affect to help protect this vulnerable order of fish. [2]

Reproduction and parental care[edit] Pipefishes, like their seahorse relatives, leave most of the parenting duties to the male, which provides all of the postzygotic care for its offspring, supplying them with nutrients and oxygen through a placenta-like connection.[3] It broods the offspring either on distinct region of its body or in a brood pouch. Brood pouches vary significantly among different species of pipefish, but all contain a small opening through which female eggs can be deposited. The location of the brood pouch can be along the entire underside of the pipefish or just at the base of the tail, as with seahorses.[4] Pipefish in the genus Syngnathus have a brood pouch with a ventral seam that can completely cover all of their eggs when sealed. In males without these pouches, eggs adhere to a strip of soft skin on the ventral surface of their bodies that does not contain any exterior covering.[5] The evolution of male brooding in pipefish is thought to be a result of the reproductive advantage granted to pipefish ancestors that learned to deposit their eggs onto the males, who could escape predation and protect them.[6] Furthermore, the ability to transfer immune information from both the mother (in the egg) and the father (in the pouch), unlike other mammals in which only the mother can transfer immune information, is believed to have an additive beneficial effect on offspring immunity.[6] Courtship between male and female pipefish involves lengthy and complicated shows of display. For example, in Syngnathus typhle, copulation is always preceded by a ritualized dance by both sexes. The dance involves very conspicuous wriggling and shaking motions, especially in comparison to the species' otherwise extremely secretive lifestyle. Under the threat or presence of a predator, pipefish are more reluctant to perform their dances. In addition, when risk of predation is high, they copulate less frequently, dance less per copulation, and females transfer more eggs per copulation. Although S. thyphle males normally prefer to mate with larger females, they mate randomly when potentially threatened by predators.[7] Furthermore, in Corythoichthys haematopterus, similar ritualized mating dances were hypothesized to aid in reproductive synchronization, by allowing the female to assess male willingness to spawn so her eggs aren't wasted.[8] During pipefish copulation, which signifies the termination of the courtship dance, the female transfers her eggs through a small ovipositor into the male brood pouch or onto the special patch of skin on the male’s ventral body surface. While the eggs are being transferred, the mating pair rises through the water until copulation is complete. At this point, the male assumes an S-shaped posture and fertilizes the eggs, all the while travelling back down the water column.[9] Males possessing brood pouches release their sperm directly into them; the pouches are then vigorously shaken. The ventral seams are not opened until weeks later when the male pipefish give birth.[5] A physical limit exists for the number of eggs a male pipefish can carry, so males are considered to be the limiting sex. Females can often produce more eggs than males can accommodate inside their brood pouches, resulting in more eggs than can be cared for. Other factors may restrict female reproductive success, including male pregnancy length and energy investment in progeny.[10] Because the pipefish embryos develop within the male, feeding on nutrients supplied by him, male pipefish invest more energy than females in each zygote. Additionally, they invest more energy per unit time than females throughout each breeding season.[11] As a result, some males may consume their embryos rather than continuing to rear them under situations in which their bodies are exhausted of resources, to regain energy. Pregnant male pipefish can absorb nutrients from their broods, in a manner very similar to filial cannibalism found in many other families of fish. The smallest eggs in a brood of various egg sizes usually have lower survival rates than larger ones, due to the larger eggs being competitively superior and more likely to develop into mature adults. In other instances, some pipefishes may consume the embryos of mates that seem less fit or desirable, as each male generally copulates with more than one female.[9] The subcaudal pouch of the male of the black-striped pipefish (Syngnathus abaster) Young are born free-swimming with relatively little or no yolk sac, and begin feeding immediately. From the time they hatch, they are independent of their parents, which at that time may view them as food. Some fry have short larval stages and live as plankton for a short while. Others are fully developed but miniature versions of their parents, assuming the same behaviors as their parents immediately. Pair bonding varies wildly between different species of pipefish. While some are monogamous or seasonally monogamous, others are not. Subcaudal pouch of Syngnathus acus, with the young ready to leave the pouch: One side of the membrane of the pouch is pushed aside to allow a view of its interior. Many species exhibit polyandry, a breeding system in which one female mates with two or more males. This tends to occur with greater frequency in internal-brooding species of pipefishes than with external-brooding ones due to limitation in male brood capacity.[12] Polyandrous species are also more likely to have females with complex sexual signals such as ornaments.[13] For example, the polyandrous Gulf pipefish (Syngnathus scovelli) displays considerable sexual dimorphic characteristics such as larger ornament area and number, and body size.[14]

Genera[edit] Subfamily Syngnathinae (pipefishes)[15] Genus Acentronura Kaup, 1853 Genus Amphelikturus Parr, 1930 Genus Anarchopterus Hubbs, 1935 Genus Apterygocampus Weber, 1913 Genus Bhanotia Hora, 1926 Genus Bryx Herald, 1940 Genus Bulbonaricus Herald in Schultz, Herald, Lachner, Welander and Woods, 1953 Genus Campichthys Whitley, 1931 Genus Choeroichthys Kaup, 1856 Genus Corythoichthys Kaup, 1853 Genus Cosmocampus Dawson, 1979 Genus Doryichthys Kaup, 1853 Genus Doryrhamphus Kaup, 1856 Genus Dunckerocampus Whitley, 1933 Genus Enneacampus Dawson, 1981 Genus Entelurus Duméril, 1870 Genus Festucalex Whitley, 1931 Genus Filicampus Whitley, 1948 Genus Halicampus Kaup, 1856 Genus Haliichthys Gray, 1859 Genus Heraldia Paxton, 1975 Genus Hippichthys Bleeker, 1849—river pipefishes Genus Hypselognathus Whitley, 1948 Genus Ichthyocampus Kaup, 1853 Genus Idiotropiscis Whitely, 1947 Genus Kaupus Whitley, 1951 Genus Kimblaeus Dawson, 1980 Genus Kyonemichthys Genus Leptoichthys Kaup, 1853 Genus Leptonotus Kaup, 1853 Genus Lissocampus Waite and Hale, 1921 Genus Maroubra Whitley, 1948 Genus Micrognathus Duncker, 1912 Genus Microphis Kaup, 1853—freshwater pipefishes Genus Minyichthys Herald and Randall, 1972 Genus Mitotichthys Whitley, 1948 Genus Nannocampus Günther, 1870 Genus Nerophis Rafinesque, 1810 Genus Notiocampus Dawson, 1979 Genus Penetopteryx Lunel, 1881 Genus Phoxocampus Dawson, 1977 Genus Phycodurus Gill, 1896 Genus Phyllopteryx Swainson, 1839 Genus Pseudophallus Herald, 1940—fluvial pipefishes Genus Pugnaso Whitley, 1948 Genus Siokunichthys Herald in Schultz, Herald, Lachner, Welander and Woods, 1953 Genus Solegnathus Swainson, 1839 Genus Stigmatopora Kaup, 1853 Genus Stipecampus Whitley, 1948 Genus Syngnathoides Bleeker, 1851 Genus Syngnathus Linnaeus, 1758 Genus Trachyrhamphus Kaup, 1853 Genus Urocampus Günther, 1870 Genus Vanacampus Whitley, 1951

Notes[edit] ^ a b c Chisholm, 1911, p. 634. ^ Red List Retrieved 2 December 2017.  Missing or empty |title= (help) ^ Jones AG, Rosenqvist G, Berglund A, Avise JC (1999). "The Genetic Mating System of a Sex-role-reversed Pipefish ( Syngnathus Typhle ): A Molecular Inquiry". Behavioral Ecology and Sociobiology. 46 (5): 357–65. doi:10.1007/s002650050630.  ^ Wilson AB, Ahnesjö I, Vincent AC, Meyer A (June 2003). "The dynamics of male brooding, mating patterns, and sex roles in pipefishes and seahorses (family Syngnathidae)". Evolution. 57 (6): 1374–86. doi:10.1111/j.0014-3820.2003.tb00345.x. PMID 12894945.  ^ a b A. G. Jones; J. C. Avise (2001). "Mating Systems and Sexual Selection in Male-Pregnant Pipefishes and Seahorses: Insights from Microsatellite -Based Studies of Maternity" (PDF). The Journal of Heredity. Retrieved 2013-09-15.  ^ a b Roth, Olivia; Klein, Verena; Beemelmanns, Anne; Scharsack, Jörn P.; Reusch, Thorsten B. H. (2012-12-01). "Male Pregnancy and Biparental Immune Priming". The American Naturalist. 180 (6): 802–814. doi:10.1086/668081. ISSN 0003-0147.  ^ Anders Berglund (July 1993). "Risky sex: male pipefishes mate at random in the presence of a predator". Animal Behaviour. 46 (1): 169–175. doi:10.1006/anbe.1993.1172. Retrieved 2013-09-15.  ^ Sogabe, A.; Yanagisawa, Y. (2007-08-01). "The function of daily greetings in a monogamous pipefish Corythoichthys haematopterus". Journal of Fish Biology. 71 (2): 585–595. doi:10.1111/j.1095-8649.2007.01523.x. ISSN 1095-8649.  ^ a b Sagebakken (2012). Parental care and brood reduction in a pipefish. Goteborg. ISBN 978-91-628-8532-8.  ^ Anders Berglund; Gunilla Rosenqvist; Ingrid Svensson (1989). "Reproductive Success of Females Limited by Males in Two Pipefish Species". The American Naturalist. Retrieved 2013-09-15.  ^ Anders Berglund; Gunilla Rosenqvist; Ingrid Svensson (1986-03-26). "Reversed sex roles and parental energy investment in zygotes of two pipefish (Syngnathidae) species" (PDF). Marine Ecology Progress Series. Retrieved 2013-09-15.  ^ Avise, John C.; Liu, Jin-Xian (2010-11-02). "Multiple mating and its relationship to alternative modes of gestation in male-pregnant versus female-pregnant fish species". Proceedings of the National Academy of Sciences. 107 (44): 18915–18920. doi:10.1073/pnas.1013786107. ISSN 0027-8424. PMID 20956296.  ^ Rosenqvist G, Berglund A (2011). "Sexual signals and mating patterns in Syngnathidae". J Fish Biol. 78 (6): 1647–61. doi:10.1111/j.1095-8649.2011.02972.x. PMID 21651521.  ^ Paczolt, Kimberly A.; Jones, Adam G. (2010-03-18). "Post-copulatory sexual selection and sexual conflict in the evolution of male pregnancy". Nature. 464 (7287): 401–404. doi:10.1038/nature08861. ISSN 0028-0836.  ^ "Syngnathinae ". World Register of Marine Species. Retrieved February 21, 2015. 

References[edit] Froese, Rainer, and Daniel Pauly, eds. (2004). "Syngnathidae" in FishBase. November 2004 version. Attribution  This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Pipe-fishes". Encyclopædia Britannica. 21 (11th ed.). Cambridge University Press. p. 634. 

External links[edit] Wikispecies has information related to Syngnathinae Pipefish at the Encyclopedia of Life PPPPipefish Flagtail Pipefish In The Home Aquarium Ichthyological Bulletin; No. 44: Review of the Indo-Pacific pipefish genus Doryrhamphus Kaup (Pisces: Syngnathidae) with descriptions of a new species and a new subspecies v t e Fish About fish Diversity Ethnoichthyology Evolution Diseases and parasites Fisheries Fishing Fish as food Fear of fish FishBase Fish kill Hypoxia in fish Ichthyology Anatomy and physiology Fish anatomy Fish physiology Estimating age Anguilliformity Bone dermal intramembranous ossification Cleithrum Chromatophore Fins dorsal fin Gill branchial arch gill raker gill slit pharyngeal arch pharyngeal slit pseudobranch Glossohyal Jaw hyomandibula pharyngeal jaw Leydig's organ Mauthner cell Meristics Operculum papillare Papilla Photophore Root effect Shark cartilage Scales ganoine Spiral valve Suckermouth Swim bladder physoclisti physostome Teeth pharyngeal teeth shark teeth Teleost leptins Digital Library Sensory systems Sensory systems in fish Ampullae of Lorenzini Barbel Hydrodynamic reception Electrocommunication Electroreception Jamming avoidance response Lateral line Otolith Passive electrolocation Capacity for pain Schreckstoff Surface wave detection Vision Weberian apparatus Reproduction Fish reproduction Bubble nest Clasper Egg case Fish development Ichthyoplankton Juvenile fish Life history theory Milt Mouthbrooder Polyandry in fish Pregnancy Roe Sequential hermaphroditism Spawning triggers Locomotion Fish locomotion Fin and flipper locomotion Amphibious fish Walking fish Flying fish Undulatory locomotion Tradeoffs for locomotion in air and water RoboTuna Other behaviour Aquatic predation Aquatic respiration Bait ball Bottom feeders Cleaner fish Diel vertical migration Electric fish Filter feeders Forage fish Migrating fish Paedophagy Predatory fish Salmon run Sardine run Scale eaters Schooling fish Sleep in fish Venomous fish Fish intelligence By habitat Cave Coastal Coldwater Coral reef Deep sea Demersal Euryhaline Freshwater Groundfish Pelagic Tropical Other types Bait Coarse Diversity Game Genetically modified Hallucinogenic Oily Poisonous Rough Whitefish Commercial Fish farming Carp Salmonids Tilapia Wild fisheries Predatory fish billfish mackerel salmon tuna Forage fish anchovy herring sardine sprats Demersal fish cod flatfish pollock Major groups Jawless fish hagfish lampreys Cartilaginous fish chimaeras sharks rays Bony fish spiny-finned fleshy-finned Lists Aquarium life Blind fish Fish common names Fish families Fish on stamps Glossary of ichthyology Large fish Threatened rays sharks Prehistoric fish more lists... Category Portal WikiProject Retrieved from "" Categories: SyngnathidaeHidden categories: Pages with citations lacking titlesPages with citations having bare URLsArticles with 'species' microformatsAll articles with unsourced statementsArticles with unsourced statements from April 2013Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource referenceWikipedia articles incorporating text from the 1911 Encyclopædia BritannicaEncyclopedia of Life ID different from Wikidata

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