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Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Thayeriinae
Etymology: Hollandichthys: From the Netherlands or a person with Holland name/surname; taramandahy: The specific name is in reference to the drainage of the type locality. In Tupi Guarani language,
Taramandahy (=Tramandaí) means winding river, or where is about to harvest (related to fish harvesting). A noun in apposition.
Eponymy: Dr William Jacob Holland (1848–1932) was a Jamaican-born American Presbyterian minister, entomologist and palaeontologist. [...] (Ref. 128868), visit book page.
Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
; Γλυκού νερού βενθοπελαγικό. Tropical
South America: Rio Maquiné and rio Três Forquilhas, rio Tramandaí system in Rio Grande do Sul and rio Mampituba and Araranguá drainages in Santa Catarina, Brazil.
Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm ? range ? - ? cm
Max length : 8.8 cm SL αρσενικό/απροσδιόριστο; (Ref. 94715)
Σύντομη περιγραφή
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Μαλακές ραχιαίες ακτίνες (συνολικά) : 11; Σπόνδυλοι: 36 - 39. This species is distinguished from its congener Hollandichthys multifasciatus by having the following characters: a small, vertically expanded black spot present at base of median caudal-fin rays, clearly visible after fixation in formalin or alcohol (vs. black spot present on caudal fin; distinctive marks on adipose fin absent (vs. anterior portion of adipose fin black); humeral spot absent on specimens larger than 60.0 mm SL (vs. humeral spot always present; two black humeral spots present on small specimens of both species). Additional characters useful to diagnose H. taramandahy from H. multifasciatus include having 8-11 dorsal procurrent caudal-fin rays (vs. 10-15), 7-8 ventral procurrent caudal-fin rays (9-12), and shorter length of the penultimate branched anal-fin ray in adult males 9.0-12.3 in SL (vs. 11.1-20.8 in SL) (Ref. 94715).
Found in lateral puddles of rivers and very small tributaries with shallow and lentic black
waters, with mud and leaf on the bottom, and very dense riparian vegetation. Larger individuals measuring 7.0-8.0 cm SL were observed isolated and small specimens measuring 3.0-4.0 cm SL were encountered in groups of 3 to 6 fishes. Feeds on spiders, ants, beetles, and insect parts. Other fish collected along with this species include Astyanax laticeps, Astyanax sp., Cyanocharax itaime, Cyphocharax voga, Gymnotus sp., Hyphessobrycon luetkenii, Mimagoniates rheocharis, Phalloceros spiloura, and Steindachnerina biornata (Ref. 94715).
Κύκλος ζωής και συμπεριφορά ζευγαρώματος
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Bertaco, V.A. and L.R. Malabarba, 2013. A new species of the characid genus Hollandichthys Eigenmann from coastal rivers of southern Brazil (Teleostei: Characiformes) with a discussion on the diagnosis of the genus. Neotrop. Ichthyol. 11(4):767-778. (Ref. 94715)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
Απειλή για τον άνθρωπο
Harmless
Ανθρώπινες χρήσεις
αλιεία: παραδοσιακή αλιεία
Εργαλεία
Ειδικές εκθέσεις
Λήψη XML
Διαδικτυακές πηγές
Εκτιμήσεις βάσει μοντέλων
Δείκτης φυλογενετικής ποικιλότητας (Αναφ.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00417 - 0.02880), b=3.08 (2.86 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Αναφ.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Ελαστικότητα (Αναφ.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Ευπάθεια στην αλιεία (Ref.
59153): Low vulnerability (10 of 100).
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