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bekateen wrote: 19 Jan 2023, 23:37 The lanceolata are finally starting to macho up!

bekateen wrote: 27 Nov 2022, 08:36What I just got home with are:

• 6
  Ancistrus sp. Rio Nanay
  (one male 14cm SL and over 18cm TL... huge!)

Cheers, Eric

Ancistrus cf_leucostictus

Ancistrus leucostictus

• As a side comment on SL, there was a 2019 Zootaxa review of this species by De Souza et al. which has a photo of
  Ancistrus leucostictus
  AUM 48162. The photo's caption reads "185.3 mm SL" for the specimen shown. But if you use the 1 cm scale bar of the photo to estimate the same specimen's SL, you obtain about 85 mm SL; and in the species text narrative (page 24, inside the "Specimens examined" paragraph), this same museum sample contains no specimen larger than 87.8 mm SL. I think it's pretty clear that the "185.3 mm SL" is a typographical error. So when I say Peruvian fish are 4 cm larger than the described populations, I'm going off the SL of my big male at about 140 mm SL as shown in my photo here.

bekateen wrote: 22 Jul 2021, 23:57

bekateen wrote: 19 Jul 2021, 02:55 We returned to the same spot off the Nanay this afternoon. Hugely successful... but you'll have to wait till at least tomorrow for pictures. Among today's catch:

• one big
  Limatulichthys griseus
  (also about 8-10 cm SL) and 2 or 3 smaller individuals.

Wow, did I underestimate this! 15.06 cm SL!

bekateen wrote: 14 Apr 2023, 17:45
After reading a Facebook post by Junior Chuctaya and a reply from Emanuel Neuhaus, I learned that this Peruvian Ancistrus is part of a study and as of now it's being investigated as

Ancistrus cf_leucostictus

.

These Peruvian fish are far-flung from the type locality of

Ancistrus leucostictus

sensu stricto, and the SL of the Peruvian fish is at least 4 cm longer than the max SL recorded for the Guyana populations. Molecular data is going to be important to unite or split the Peru and Guyana populations.

I've had some of these for 16 months now and I'm kinda surprised they haven't yet bred. Patience....

Cheers, Eric

Ochmacanthus reinhardtii

Tatia dunni

Thalassophryne amazonica

The present work corresponds to a fish inventory, carried out between August and September 2019, in three sampling sites in the Pintuyacu stream, a tributary of the Itaya River basin, in the Peruvian Amazon. Based on 504 individuals analyzed, 117 species were identified, corresponding to 33 families and 8 orders. The most diverse order was Characiformes (65 species, 55.6%), followed by Siluriformes (31 species, 26.5%). At the Characidae family level, it presents the highest species richness with 24 species (20.5%). The most abundant species were Stethaprion erythrops (13.1%, 66 individuals), Knodus smithi (13.1%, 66 individuals) and Bujurquina peregrinabunda (6.2%, 31 individuals). Species for ornamental and consumer use were recorded. No threatened species were recorded and most were classified as Least Concern (LC), according to IUCN criteria. The present study is the first to present a list of the ichthyofauna present in the Pintuyacu stream and consequently the first inventory published for the Itaya River basin. Which highlights the need to continue carrying out ichthyological inventories, with the aim of enriching the knowledge of the freshwater ichthyofauna of the country and the Amazon region, as well as applying necessary measures for the conservation of our ichthyological
resources.

• KEYWORDS: Conservation, taxonomic composition, Amazon Basin, inventory, freshwater fishes

RESUMEN
El presente trabajo corresponde a un inventario de peces, realizado entre agosto y setiembre del 2019, en tres sitios de muestreo en la quebrada Pintuyacu, tributario de la cuenca del rı́o Itaya, en la Amazonı́a peruana. En base a 504 individuos analizados, se identificaron 117 especies, correspondientes a 33 familias y 8 órdenes. El orden más diverso fue Characiformes (65 especies, 55.6%), seguido de Siluriformes (31 especies, 26.5%). A nivel de familia Characidae presento la mayor riqueza de especies con 24 especies (20.5%). Las especies más abundantes fueron Stethaprion erythrops (13.1%, 66 individuos), Knodus smithi (13.1%, 66 individuos) y Bujurquina peregrinabunda (6.2%, 31 individuos). Se registraron especies de uso ornamental y de consumo. No se registraron especies amenazadas y la mayorı́a se clasificaron en preocupación menor (LC), según los criterios de la IUCN. El presente estudio es el primero en presentar una lista de la ictiofauna presente en la quebrada Pintuyacu y consecuentemente el primer inventario publicado para la cuenca del rı́o Itaya. Lo cual pone en evidencia la necesidad de continuar realizando inventarios ictiológicos, con la finalidad de enriquecer el conocimiento de la ictiofauna de agua dulce del paı́s y de la región amazónica, ası́ como aplicar medidas necesarias para la conservación de nuestros recursos ictiológicos.

• PALABRAS CLAVE: Conservación, composición taxonómica, cuenca del Amazonas, inventario, peces de agua dulce