Results 41 to 50 of about 8,683 (201)

Ossification of the cranium of Inpaichthys kerri (Characiformes: Acestrorhamphidae) with discussion of paedomorphic traits in the genus

Journal of Anatomy, EarlyView.
In this study, we present a detailed description of the cranial development of Inpaichthys kerri (Characiformes: Acestrorhamphidae), highlighting important topics such as pedomorphic characters and their relationship with ontogeny and phylogeny, as well as ossification sequences unique to the species. Abstract The study of development provides valuable
Yasmim De Santana Santos, Manoela M. F. Marinho   +1 more
wiley   +1 more source

Passage performance of long-distance upstream migrants at a large dam on the Paraná River and the compounding effects of entry and ascent

Neotropical Ichthyology
This paper presents results of a fishway evaluation performed at the Engenheiro Sérgio Motta Hydroelectric Power Plant (known as Porto Primavera) - CESP, Paraná River, Brazil.
Ricardo Luiz Wagner, Sergio Makrakis, Theodore Castro-Santos, Maristela Cavicchioli Makrakis, João Henrique Pinheiro Dias, René Fuster Belmont   +5 more
doaj   +1 more source

Cross-amplification of heterologous microsatellite markers in Piracanjuba

Ciência Rural, 2017
: Brycon orbignyanus, popularly known in Brazil as piracanjuba, is a fish with great economic value but whose natural population drastically decreased in number during the last years.
Pedro Luiz de Castro, Ricardo Pereira Ribeiro, Silvio Carlos Alves dos Santos, Elenice Souza dos Reis Goes, Felipe Pinheiro de Souza, Angela Rocio Poveda-Parra, Lauro Vargas, Angela Maria Urrea-Rojas, Nelson Mauricio Lopera-Barrero   +8 more
doaj   +1 more source

Ichthyological ecoregions of Argentina [PDF]

, 2002
The Argentine Republic is situated in the southernmost portion of the American continent, occupying over 2,785,600 km2 not including the Antarctic territory. The country ranges from subtropical areas (21º46’S) to subantarctic regions (55º03’S), extending
López, Hugo Luis, Montenegro, Marcelo J., Morgan, Cecilia C.   +2 more
core  

Electrified rhythms: How hydropower infrastructure transforms hydrosocial relations of riverine communities in the Lower Sogamoso River, Colombia

People and Nature, Volume 8, Issue 3, Page 782-796, March 2026.
Abstract Hydropower dams regulate water flows for millions of downstream inhabitants worldwide, altering water availability. Under a changing climate, flow control is often framed technically and politically as being essential for reducing drought and flood risks. However, it can also disrupt ecological flows, impact livelihoods and erode environmental
Laura Betancur‐Alarcón, Laura Pulgarín‐Morales, Camila Jiménez‐Saénz, Rossella Alba, Tobias Krueger   +4 more
wiley   +1 more source

New cases of supernumerary chromosomes in characiform fishes

Genetics and Molecular Biology, 1999
Supernumerary chromosomes were described for five species of Neotropical characiform fishes. These extra chromosomes were small, acrocentric and fully heterochromatic in Leporinus friderici from two different localities as well as in Leporinus sp., but ...
Paulo Cesar Venere, Carlos Suetoshi Miyazawa, Pedro Manoel Galetti Junior   +2 more
doaj   +1 more source

Review of river fisheries valuation in Central and South America [PDF]

, 2008
Unlike Africa and Asia, where a large part of the population are heavily dependent upon fishing for their livelihoods, fishing for a living in the interior of Central and South America (CSA) remains a marginal occupation for all but the most isolated of ...
Bennett, E., Thorpe, A.
core   +1 more source

Fine‐Scale Genomic Divergence in the Amazonian Pirarucu (Arapaima gigas) Highlights the Need for Local Management Strategies

Freshwater Biology, Volume 71, Issue 3, March 2026.
ABSTRACT Freshwater habitats face significant human disturbances globally, impacting food security and ecosystems. Protected areas can mitigate biodiversity loss, but limited data on population connectivity hinders conservation management. This study examines pirarucu (Arapaima gigas), a heavily exploited and threatened Amazonian fish, using genomic ...
Julia Tovar Verba, Ricardo J. Pereira, João V. Campos‐Silva, Izeni P. Farias, Tomas Hrbek, Carlos A. Peres, Joseph E. Hawes   +6 more
wiley   +1 more source

Paramphistomidae (Trematoda: Digenea) de peixes de água doce: dois novos gêneros da Colômbia e uma redescrição de Dadaytrema Oxycephala (Diesing, 1836) Travassos, 1934, da Amazônia [PDF]

Acta Amazonica, 1979
Resumo Dois novos gêneros e espécies de Paramphistomidae Fischoeder. 1901 (Trematoda: Digenea) dos tratos intestinais de peixes foram descritos, a saber: Colocladorchis ventrastomis a. gen., n. sp.
Vernon E. Thatcher
doaj   +1 more source

Role of glucose in enhancing life and potency of Cirrhinus mrigala spermatozoa during cryopreservation [PDF]

, 2015
Cryopreservation of fish gametes is an emerging technology and breeding with cryopreserved gametes is advancement in fish seed production. Success of cryopreservation is evaluated by the post - thaw motility of the spermatozoa, an for which energy is ...
Betsy, C. Judith, Kumar, J. Stephen Sampath, Rajagopalasamy, C. B. T.   +2 more
core   +2 more sources