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Ammocrypta beanii és una espècie de peix de la família dels pèrcids i de l'ordre dels perciformes present a Amèrica del Nord.[2] Els mascles poden assolir els 7,2 cm de longitud total.[2]
Ammocrypta beanii és una espècie de peix de la família dels pèrcids i de l'ordre dels perciformes present a Amèrica del Nord. Els mascles poden assolir els 7,2 cm de longitud total.
The naked sand darter (Ammocrypta beanii) is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches.[2] It is found in the south-eastern United States.
The naked sand darter is a small fish ranging in size from 40 to 50 mm long, the maximum being around 64 mm. Being a long thin darter, it is devoid of scales with the exception of a few rows above and below the lateral line and sometimes the caudal peduncle. Slightly transparent in life with a yellow color and iridescent operculum, the naked sand darter blends in with its habitat. It has darker bands in the dorsal, anal, and caudal fins with a whitish base and tip. Males of breeding size with have a dark spot at the front of the dorsal fin. Unlike similar darters, it does not have an opercular spine.[3]
Larvae of small fish are the primary source of food for naked sand darters. They also feed on smaller crustaceans like copepods or clam larvae depending on their size. Naked sand darters feed continuously throughout the day, but stop at night. They also feed less in winter and summer months then pick back up before and after breeding season.[3]
Naked sand darters prefer the sandy bottoms of clean, freshwater rivers and streams.[2] They can be found about 1 m deep on the bottom, digging into the sand to wait for prey to swim by.[1]
They can be found exclusively along the Gulf of Mexico in the rivers and drainages of eastern Louisiana to as far east as the Mobile Bay drainage in Alabama.[1] Naked sand darters have been found as far north as West Tennessee.[3]
Breeding season is from March or April until September or October when water temperatures are between 17 and 29 °C. Males develop tubercles on their anal and pelvic fins to aid in fighting for females. Females can produce from 12–122 eggs at a time and reach sexual maturity after a year. They only live 24 to 30 months.[2]
The naked sand darter was first formally described in 1877 by the American ichthyologist David Starr Jordan (1851-1931) with the type locality given as the Natalbany River, near Tickfaw, Louisiana.[4] It is the type species of the genus Ammocrypta, which Jordan also originally described.[5] The genus name, Ammocrypta, comes from the Greek word ammos meaning sand and the Greek kryptos meaning hidden. The specific name, beanii, comes from the first collector of the species, Tarleton H. Bean (1846-1915).[6]
The naked sand darter (Ammocrypta beanii) is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is found in the south-eastern United States.
Ammocrypta beanii es una especie de peces de la familia Percidae en el orden de los Perciformes.
Los machos pueden llegar alcanzar los 7,2 cm de longitud total.[1]
Se encuentran en Norteamérica.
Ammocrypta beanii Ammocrypta generoko animalia da. Arrainen barruko Percidae familian sailkatzen da.
Ammocrypta beanii Ammocrypta generoko animalia da. Arrainen barruko Percidae familian sailkatzen da.
Ammocrypta beanii est une espèce de poisson du genre Ammocrypta et de la famille des Percidae. Elle est originaire du centre et du sud-est des États-Unis.
Elle a été décrite scientifiquement pour la première fois par le naturaliste américain David Starr Jordan en 1877. Son nom spécifique est un hommage à Tarleton Hoffman Bean, ichtyologiste américain.
Ammocrypta beanii est une espèce de poisson du genre Ammocrypta et de la famille des Percidae. Elle est originaire du centre et du sud-est des États-Unis.
Ammocrypta beanii is een straalvinnige vissensoort uit de familie van de echte baarzen (Percidae).[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1877 door Jordan.
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比恩氏鏢鱸為輻鰭魚綱鱸形目鱸亞目河鱸科的其中一種，分布於美國密西西比河流域，體長可達7.2公分，棲息在沙底質的溪流中，屬肉食性。
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