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Tetraodontiformes (Puffers and filefishes) >
Monacanthidae (Filefishes)
Etymology: Pervagor: Latin, pervagor = nomadic, itinerant.
Eponymy: Dr John ‘Jack’ Ernest Randall Jr. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated. Tropical; 30°N - 10°N
Western Indian Ocean: known only from the Red Sea and the Gulf of Aden.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.7 cm SL male/unsexed; (Ref. 527)
Dorsal spines (total): 1; Dorsal soft rays (total): 29 - 31; Anal spines: 0; Anal soft rays: 27 - 28; Vertebrae: 19. Head and body brown; relatively large, black branchial blotch from mid-gill slit to rear border of eye; dusky blotch around eye continued onto forehead and around spinous dorsal base; dark brown iris; pale dusky brown lips. Large pelvic fin rudiment, narrowly attached to posterior margin of ventral flap. Midbody scales with 1-7 spinules, not closely packed; elongate spinules on posterior half of body. Scale spinules on posterior half of body of male very prominent, scale ridge rugosities developing at about 55-65 mm SL.
Occurs in shallow coral reefs to depths of 10 m or more.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Hutchins, J.B., 1986. Review of the monacanthid fish genus Pervagor, with descriptions of two new species. Indo-Pac. Fish. (12):35 p. (Ref. 527)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
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Estimates based on models
Preferred temperature (Ref.
123201): 25.5 - 29.4, mean 27.9 °C (based on 120 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01995 (0.00956 - 0.04164), b=2.93 (2.76 - 3.10), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.9 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).