| 词条 | Argyropelecus sladeni |
| 释义 |
| name = Sladen's hatchetfish | image = | status = LC | status_system = iucn3.1 | status_ref = [1] | regnum = Animalia | phylum = Chordata | classis = Actinopterygii | ordo = Stomiiformes | familia = Sternoptychidae | subfamilia = Sternoptychinae | genus = Argyropelecus | species = A. sladeni | binomial = Argyropelecus sladeni | binomial_authority = Regan, 1908 [2] }} Argyropelecus sladeni (Sladen's hatchetfish) is a species of ray-finned fish in the family Sternoptychidae, found in the tropical and subtropical Atlantic, Indian and Pacific Oceans. This small fish lives in the mesopelagic zone by day and makes a daily vertical migration to the epipelagic zone at night. DescriptionArgyropelecus sladeni is a small, deep-bodied hachetfish with an abdominal keel and a maximum standard length of about {{convert|60|mm|in|1|abbr=on}}. The mouth is of medium size, the tubular eyes point upwards, the dorsal fin has nine soft rays and is three times as long as it is high, and the adipose dorsal fin has a long base. The pectoral fins have 10 to 11 soft rays, the pelvic fins have 6 and the anal fin is in two parts, with seven soft rays in the front part and five behind. The upper pre-opercular spine is long and slopes upwards and backwards, while the lower one slopes downwards. There are two diagonally orientated post-abdominal spines, one blunt and forward pointing and the other backward pointing. The dorsal surface of the fish is dark, the flanks are silvery and there are photophores (luminous spots) on the operculum and belly.[3]Distribution and habitatThis species has a circumglobal distribution in tropical and subtropical seas. The fish make daily vertical migrations; during the day their depth range is {{convert|350|to|600|m|ft|-2|abbr=on}} while at night it is {{convert|100|to|375|m|ft|-2|abbr=on}}.[3] During the day, trawls at depths between {{convert|300|and|400|m|ft|-2|abbr=on}} produce the highest catches and at night the greatest abundance of fish is in the depth range {{convert|0|to|200|m|ft|-2|abbr=on}}.[5] EcologyA. sladeni feed on planktonic organisms, krill, amphipods, copepods and ostracods.[4] The species is oviparous and both eggs and larvae drift as part of the plankton.[1]StatusA common fish, A. sladeni is abundant in many parts of its wide range. No specific threats have been identified and the International Union for Conservation of Nature has rated its conservation status as being of "least concern".[1] References1. ^1 2 {{cite journal | author = Harold, A. | title = Argyropelecus sladeni | journal = IUCN Red List of Threatened Species | volume= 2015 | page = e.T21132859A21913749 | year = 2015 | doi = 10.2305/IUCN.UK.2015-4.RLTS.T21132859A21913749.en }} {{Taxonbar|from=Q2145852}}2. ^{{cite WoRMS |author=Bailly, Nicolas |year=2015 |title=Argyropelecus sladeni Regan, 1908 |id=158837 |accessdate=18 February 2016 }} 3. ^1 {{cite book|author1=McEachran, John|author2=Fechhelm, Janice D.|title=Fishes of the Gulf of Mexico, Vol. 1: Myxiniformes to Gasterosteiformes|url=https://books.google.com/books?id=jZtrYzge92YC&pg=RA2-PA433 |year= 2013 |publisher=University of Texas Press|isbn=978-0-292-75705-9 |page=433}} 4. ^1 {{cite journal |author1=Kinzer, J. |author2=Schulz, K. |year=1988 |title=Vertical distribution and feeding patterns of midwater fish in the central equatorial Atlantic II. Sternoptychidae |journal=Marine Biology |volume=99 |issue=2 |pages=261–269 |doi=10.1007/BF00391989 }} 4 : Sternoptychidae|Fish described in 1908|Bioluminescent fish|Taxa named by Charles Tate Regan |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。