Syngnathus


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Syngnathus

 

(pipefish), a genus offish of the family Syngna-thidae, of the order Solenichthyes. The fish have slender, elongated (up to 40 cm), six- or seven-sided bodies, covered completely with an armor of bony plates. The snout is elongated in the form of a pipe, and the mouth is small and toothless. The gills resemble tuftlike swellings and are covered with a large opercular bone. There are no pelvic fins, and the caudal fin is very small. The male has a brood pouch on either his abdomen or caudal shaft, into which the female deposits her roe during reproduction. The roe develops in isolation from the external environment; it receives oxygen from the blood vessels of the membrane of the brood pouch. After the fry hatch from the roe, the membrane is sloughed off. Upon hatching, the fry remain for some time in the brood pouch. There are approximately 50 known species distributed in tropical, subtropical, and temperate seas. In the USSR approximately ten species are found in the Black, Caspian, Baltic, and Japan seas. Species of this genus have no commercial value.

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Mechanical properties of the dorsal fin muscle of seahorse (Hippocampus) and pipefish (Syngnathus).
Considerable confusion surrounds the status of the Texas pipefish, Syngnathus affinis Gunther 1870.
When trying to acclimatize mullets, six species of gobinid fish, an atherinid (the sand smelt, Atherina boyeri), and the striped pipefish (Syngnathus nigrolineatus) were accidentally released; only three gobinids and the sand smelt later became very abundant.
Polygynandry in the dusky pipefish Syngnathus floridae revealed by microsatellite DNA markers.
2.8 1.3 Neogobius fluviatilis 3.4 0.7 5.6 1.4 Neogobius melanostomus 6.9 1.6 Mesogobius batrachocephalus 3.4 1.2 Proterorhinus semilunaris 3.4 0.3 2.8 0.2 Perca fluviatilis 24.1 25.0 11.1 7.6 Sander lucioperca 8.3 3.5 Syngnathus abaster 2.8 0.2 Unidentified fish remains Frogs 3.4 0.9 Length groups (cm) Prey items > 59 (n = 17) All lengths (n = 82) %FO %IRI %FO %IRI Fish 100.0 100.0 98.8 99.9 Rutilus rutilus 11.8 4.1 22.0 25.9 Scardinius erythrophthalmus 11.0 5.3 Abramis brama 5.9 3.3 4.9 3.5 Blicca bjoerkna 5.9 0.9 13.4 7.8 Alburnus alburnus 3.7 0.4 Tinca tinca 5.9 0.9 2.4 0.3 Carassius gibelio 35.3 69.4 17.1 34.7 Hypophthalmichthys sp.
Reproductive aspects of the Gulf pipefish, Syngnathus scovelli (Teleostei: Syngnathidae), from southeastern Brazil.
Black Rockfish, Bay Pipefish (Syngnathus leptorhynchus), Shiner Surfperch (Cymatogaster aggregata), and Tubesnout (Aulorhynchus flavidus) comprised the majority (74.3%) of the total number captured.
Concentrated spermatozoa were obtained from a lancelet (Branchiostoma belcheri) and 35 fish species (Deania calcea, Chimaera phantasma, Sardinops melanostictus, Engraulis japonica, Osmerus eperlanus mordax, Spirinchus lanceolatus, Hypomesus pretiosus japonicus, Hypomesus transpacificus nipponensis, Plecoglossus altivelis altivelis, Salangichthys microdon, Oncorhynchus mykiss, Hypoptychus dybowskii, Aulichthys japonicus, Gasterosteus aculeatus, Syngnathus schlegeli, Hexagrammos agrammus, Hexagrammos octogrammus, Hexagrammos otakii, Pseudoblennius cottoides, Rhinogobius sp.
Syngnathus abaster###9###2.78-10.60###TL###0.08-0.78###0.0015###2.859###0.739
Nunca se ha estudiado la morfologia de la cauda del pez aguja de rio de rayas negras (Syngnathus abaster).