Classification / Names
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Gobiiformes (Gobies) >
Gobiidae (Gobies) > Gobionellinae
Etymology: Economidichthys: Greek, oikonomos = manager of a household, steward (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
; น้ำจืด สัตว์น้ำหน้าดิน; ระดับความลึก ? - 15 m (Ref. 59043). Temperate; 39°N - 38°N
Europe: endemic to the oligotrophic Lake Trichonis, western Greece.
Length at first maturity / ขนาด / น้ำหนัก / Age
Maturity: Lm 1.8 range ? - ? cm
Max length : 3.0 cm TL เพศผู้/กระเทย; (Ref. 12215); 2.7 cm TL (female); อายุสูงสุดที่ได้รายงาน: 1.75 ปี (Ref. 59043)
Short description
เครื่องมือที่ใช้ในการแยกชนิดสัตว์,สิ่งมีชีวิตออกจากกัน | สัณฐานวิทยา | ความยาวต่างๆ
เงี่ยงครีบก้น: 1; ก้านครีบอ่อนที่ก้น: 9 - 11; สัตว์มีกระดูกสันหลัง: 30 - 31. Body pale, with long vertical stripes in both sexes, some over 2/3 body depth; perianal organ small, less than half length of pelvic disc; pelvic anterior membrane depth about half pelvic spine length in ventral midline; body with well spaced scales in single series along lateral midline, and otherwise naked except on caudal peduncle and side of anterior abdomen; typical D2 I/10-11; interorbit with two transverse rows of sensory papillae.
With a mature female at 18 mm SL, this is the smallest European freshwater fish; 2.1 mm at hatching its larvae are the smallest free-living European vertebrates. Found in areas covered by aquatic vegetation, in reed stands; in sheltered bays down to 15 m (Ref. 59043); at the mouth of tributary streams and has been observed in small shoals near the surface, over open areas of gravel or stones (Ref. 26100). Feeds on invertebrates, mainly on cladocerans and larvae of mussel Dreissena polymorpha during the spawning season. Spawns after first winter, from February to May, with eggs (0.7 x 0.6 mm) deposited in a cavity (usually inside standing, broken reeds); these are cleaned and guarded by the male. A single nest may occupy up to 2000 eggs spawned by several females; with females spawning at least twice during the season. Eggs hatch in about a day, the larvae living on the surface layer, near shore, and after yolk absorption, live in deeper layers or near bottom, moving upward at night. Maximum known age is 21 months. Land reclamation, lake level fluctuations resulting to water abstraction and pollution threaten survival of this species (Ref. 59043).
Life cycle and mating behavior
Maturities | การสืบพันธุ์ | Spawnings | Egg(s) | Fecundities | ตัวอ่อน
Eggs are spawned in a cavity; they are cleaned and guarded by the male (Ref. 59043). A single nest is usually occupied by up to 2000 eggs spawned by several females. Females spawn at least twice during a season (Ref. 59043).
Miller, P.J., 1990. The endurance of endemism: the Mediterranean freshwater gobies and their prospects for survival. J. Fish Biol. 37(Suppl.A):145-156. (Ref. 12215)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
เครื่องมือ
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00442 - 0.02163), b=3.05 (2.86 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ระดับชั้นอาหาร (Ref.
69278): 3.5 ±0.37 se; based on food items.
Generation time: 0.7 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
ความสามารถในการกลับคืนสู่ปกติ (Ref.
120179): ความสูง, เวลาต่ำสุดที่จะทำให้ประชากรเพิ่มขึ้นเป็น 2 เท่าใช้เวลาน้อยกว่า 15 เดือน (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
