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Percopsiformes (Trout-perches, pirate perches and cavefishes) >
Amblyopsidae (Cavefishes)
Etymology: agassizii: Named after the great naturalist Louis Agassiz (Ref. 10294).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce demersal. Temperate; 39°N - 35°N
North America: portions of Tennessee, Kentucky, Illinois and Missouri, U.S.A.
Tamanho / Peso / Idade
Maturity: Lm ?  range ? - ? cm
Max length : 9.0 cm TL macho/indeterminado; (Ref. 10294); common length : 5.3 cm TL macho/indeterminado; (Ref. 12193); idade máx. registrada: 3.00 anos (Ref. 10294)
Descrição suscinta
Morfologia | Morfometria
Raios dorsais (total): 9-11; Raios anais : 9 - 11; Vértebras: 33 - 35. Scales minute and embedded. Pelvic fins absent. Branched caudal fin rays 11-17; branchiostegal rays 6. Triads of sensory papillae occur midlaterally and scattered clusters of neuromasts are present on the head. Coloration uniform dark gray to back with paler venter.
Adults occur in springs and caves (but almost always near surface). They live underground but emerge above ground in springs (Ref. 5723). Active in springs at night and usually retreat underground during the day. The few individuals which venture into the spring portions of their habitat may show strong rheotaxis for half to one-minute periods but usually show strong thigmotaxis and hide under rocks or debris (Ref. 34868). Feed at night on amphipods, midge larvae, tiny worms and micro-crustaceans. Fecundity averages about 100 eggs per female (Ref. 10294). Eggs are carried in gill chambers of females (Ref. 205).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Incubates eggs in gill chamber of females (Ref. 205).
Etnier, D.A. and W.C. Starnes, 1993. The fishes of Tennessee. The University of Tennessee Press, Knoxville, Tennessee, USA. (pls. check date). (Ref. 10294)
Status na Lista Vermelha da UICN (Ref. 130435)
Ameaça para os humanos
Harmless
Uso pelos humanos
Mais informação
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Estimates based on models
Índice de diversidade filogenética (Ref.
82804): PD
50 = 1.0088 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 3.3 ±0.44 se; based on food items.
Generation time: 1.6 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Resiliência (Ref.
120179): Elevada, tempo mínimo de duplicação da população menor que 15 meses (K=0.67; tm=1; tmax=3; Fec = 100).
Fishing Vulnerability (Ref.
59153): Low vulnerability (21 of 100).