Teleostei (teleosts) >
Eupercaria/misc (Various families in series Eupercaria) >
Sciaenidae (Drums or croakers)
Etymology: Isopisthus: Greek, isos = equal + Greek, opisthe = behind (Ref. 45335).
More on author: Cuvier.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; brackish; demersal; depth range 1 - 45 m (Ref. 3702). Tropical; 10°N - 27°S, 83°W - 34°W
Western Atlantic: Costa Rica to southern Brazil.
Length at first maturity / Size / Weight / Age
Maturity: Lm 15.9 range ? - ? cm
Max length : 41.5 cm TL male/unsexed; (Ref. 122735); common length : 20.0 cm TL male/unsexed; (Ref. 3702); max. published weight: 740.00 g (Ref. 122735)
Dorsal spines (total): 8 - 9; Dorsal soft rays (total): 19 - 20; Anal spines: 2; Anal soft rays: 18 - 19. Silver grey, darker above. A diffuse black spot at pectoral-fin bases, fins pale to yellowish. Mouth large, strongly oblique, lower jaw projecting. Upper jaw with a pair of large canine-like teeth at tip. Chin without barbel or pores, lower margin of snout with 2 marginal pores. Two widely separated dorsal fins. Gas bladder with a pair of horn-like anterior appendages. Sagitta (large earstone) moderately thick and oval (Ref 51721).
Body shape (shape guide): fusiform / normal.
Found in shallow coastal waters over sandy mud or soft mud bottoms (Ref. 3702). Feeds mainly on small shrimps (Ref. 3702). Important food fish.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Cervigón, F., 1993. Los peces marinos de Venezuela. Volume 2. Fundación Científica Los Roques, Caracas,Venezuela. 497 p. (Ref. 9626)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Fisheries: minor commercial; bait: usually
Tools
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Estimates based on models
Preferred temperature (Ref.
123201): 24.8 - 27.9, mean 27.4 °C (based on 110 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00794 (0.00727 - 0.00867), b=3.07 (3.05 - 3.09), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trophic level (Ref.
69278): 4.0 ±0.4 se; based on diet studies.
Resilience (Ref.
120179): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (32 of 100).
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Nutrients (Ref.
124155): Calcium = 209 [116, 401] mg/100g; Iron = 1.19 [0.63, 2.15] mg/100g; Protein = 19.3 [18.1, 20.4] %; Omega3 = 0.269 [0.138, 0.466] g/100g; Selenium = 43.8 [22.6, 88.2] μg/100g; VitaminA = 23.3 [8.3, 72.3] μg/100g; Zinc = 1.4 [1.0, 2.0] mg/100g (wet weight);
