Midshipman fish
Midshipman fish | |
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Plainfin midshipman (Porichthys notatus) | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Batrachoidiformes |
Family: | Batrachoididae |
Subfamily: | Porichthyinae |
Genus: | Porichthys Girard 1854 |
Type species | |
Porichthys notatus Girard 1854[2]
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Species | |
A midshipman fish is any species of toadfish belonging to the genus Porichthys (in family Batrachoididae). Midshipman fish are distinguished by their photophores (organs which attract prey and after which they are named, being said to resemble the buttons of a naval uniform) and four lateral lines. Typical midshipman fishes, such as the plainfin midshipman (Porichthys notatus), are nocturnal and bury themselves in sand or mud in the intertidal zone during the day. At night they float just above the seabed. Some species have venomous dorsal spines and are capable of inflicting serious injuries if handled.[3]
Description
Male midshipman fish have two morphs: type I and type II. Type I and type II males have different reproductive strategies, and can be distinguished from each other based on physical characteristics. Type I males are eight times larger in body mass, and have much larger vocal organs. Type II males’ reproductive organs are seven times larger in size than those of type I males.[4] Female and type II male midshipman fish can be distinguished from each other by the female’s slightly larger size, and the type II male midshipman’s large reproductive organs.[5]
Species
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Atlantic_midshipman_%28_Porichthys_plectrodon_%29.jpg/300px-Atlantic_midshipman_%28_Porichthys_plectrodon_%29.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/4/49/Porichthys_plectrodon_photophores.jpg/230px-Porichthys_plectrodon_photophores.jpg)
Extant species
There are currently 14 recognized extant species in this genus:[6]
- Porichthys analis C. L. Hubbs & L. P. Schultz, 1939 (Darkedge midshipman)
- Porichthys bathoiketes C. R. Gilbert, 1968
- Porichthys ephippiatus H. J. Walker & Rosenblatt, 1988 (Saddle midshipman)
- Porichthys greenei C. H. Gilbert & Starks, 1904 (Greene's midshipman)
- Porichthys kymosemeum C. R. Gilbert, 1968
- Porichthys margaritatus (J. Richardson, 1844) (Daisy midshipman)
- Porichthys mimeticus H. J. Walker & Rosenblatt, 1988 (Mimetic midshipman)
- Porichthys myriaster C. L. Hubbs & L. P. Schultz, 1939 (Specklefin midshipman)
- Porichthys notatus Girard, 1854 (Plainfin midshipman)
- Porichthys oculellus H. J. Walker & Rosenblatt, 1988 (Smalleye midshipman)
- Porichthys oculofrenum C. R. Gilbert, 1968
- Porichthys pauciradiatus D. K. Caldwell & M. C. Caldwell, 1963
- Porichthys plectrodon D. S. Jordan & C. H. Gilbert, 1882 (Atlantic midshipman)
- Porichthys porosissimus (G. Cuvier, 1829)
Fossil species
- †Porichthys analis - Early Pliocene Onzole Formation, Ecuador[7]
- †Porichthys margaritatus - idem
- †Porichthys pedemontanus Robba 1970 - Tortonian Italy[8]
Biology
Reproduction and vocalization
Mating in midshipman fishes depends on auditory communication. Male midshipman fish produce several different vocalizations while females only make grunts in non-breeding situations.[4]
References
- ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera". Bulletins of American Paleontology. 364: 560. Archived from the original on 2011-07-23. Retrieved 2008-01-08.
- ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Porichthys". Catalog of Fishes. California Academy of Sciences. Retrieved 18 July 2018.
- ^ Lopes-Ferreira, Mônica; Ramos, Anderson Daniel; Martins, Itamar Alves; Lima, Carla; Conceição, Katia; Haddad, Vidal (August 2014). "Clinical manifestations and experimental studies on the spine extract of the toadfish Porichthys porosissimus". Toxicon. 86: 28–39. doi:10.1016/j.toxicon.2014.04.014. PMID 24814010.
- ^ a b Brantley, Richard K.; Bass, Andrew H. (26 April 2010). "Alternative Male Spawning Tactics and Acoustic Signals in the Plainfin Midshipman Fish Porichthys notatus Girard (Teleostei, Batrachoididae)". Ethology. 96 (3): 213–232. doi:10.1111/j.1439-0310.1994.tb01011.x.
- ^ Lee, Jonathan S. F.; Bass, Andrew H. (July 2006). "Dimorphic male midshipman fish: reduced sexual selection or sexual selection for reduced characters?". Behavioral Ecology. 17 (4): 670–675. doi:10.1093/beheco/ark015.
- ^ Froese, Rainer and Pauly, Daniel, eds. (2012). Species of Porichthys in FishBase. April 2012 version.
- ^ Onzole Formation at Fossilworks.org
- ^ Porichthys pedemontanus at Fossilworks.org
External links
Media related to Porichthys at Wikimedia CommonsError: "Q1909490" is not a valid Wikidata entity ID.