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Margariscus margarita, Allegheny pearl dace : bait
> Cypriniformes (Carps) > Leuciscidae (Minnows) > Plagopterinae
Etymology: Margariscus:Greek, margariskos = pearl (Ref. 45335). Eponymy: These are not eponyms but relate to the meanings of ‘margarita’; pearl and daisy. The dragonfish was so-named due to having a “pearl-colored spot above the maxilla”. (Ref. 128868), visit book page. More on author: Cope.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione Ecologia
North America: Atlantic Slope of USA from Hudson River drainage in Vermont and New York, south to Potomac River drainage in Virginia; upper Ohio River drainages in south New York to West Virginia (Ref. 86798); Canada from British Columbia to Newfoundland and Nova Scotia (Ref. 52559), Northwest Territories, and Yukon Territory (Ref. 119194).
Lunghezza alla prima maturità / Dimensione / Peso / Età
Maturità: Lm9.4 range ? - ? cm Max length : 16.0 cm TL maschio/sesso non determinato; (Ref. 86798); common length : 9.3 cm TL maschio/sesso non determinato; (Ref. 12193); Età massima riportata: 4 anni (Ref. 12193)
Margariscus margarita is almost identical to Margariscus nachtriebi but can be distinguished from this species by having larger scales and usually 50-62 lateral scales (Ref. 86798). Body shape (shape guide): elongated.
Adults inhabit pools of upland creeks and small rivers, and also ponds and lakes. Usually found over sand or gravel (Ref. 86798). They feed on copepods, cladocerans, chironomids, beetles, filamentous algae, and Chara (Ref. 1998). Spawning occurs in spring (Ref. 1998).
Spawning occurs in shallow rivers with moderate current, on sand or gravel. Males maintained territories 20.3 cm wide (at least 1.83 m apart from each other). A ripe female is driven onto the territory. The male places his pectoral fin beneath the female's body anteriorly, and his caudal fin placed over the caudal peduncle of the female. The pair vibrates and the eggs are deposited. Females spawn with different males.
Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Dinamica della popolazione Parametri di crescita Età massima / dimensioni massime Rapporto lunghezza-peso. Lunghezza-lunghezza rel. Lunghezza-frequenze Conversione di massa Reclutamento Abbondanza
Ciclo di vita Riproduzione Maturità Maturità/Gli occhielli sono relativi. Fecondità Deposizione Aggregazioni riproduttive Uova Sviluppo delle uova Larve Dinamica popolazioni larvali
Fisiologia Composizione corporea Nutrienti Consumo di ossigeno Tipo di nuoto Velocità di nuoto Pigmenti visivi Suono del pesce Malattie e parassiti Tossicità (LC50)
Indice di diversità filogenetica (Fonte Biblio. 82804): PD50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00617 (0.00251 - 0.01514), b=3.05 (2.83 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Livello trofico (Fonte Biblio. 69278): 3.1 ±0.36 se; based on food items.
Resilienza (Fonte Biblio. 120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (tm=4).
Vulnerabilità della pesca (Ref. 59153): Low vulnerability (10 of 100). 🛈
