Results 71 to 80 of about 19,555 (242)
Redescription of Hypoptopoma inexspectata (Holmberg, 1883), with notes on its anatomy (Siluriformes: Loricariidae). [PDF]
, 2001 Hypoptopoma inexspectata is diagnosed and redescribed based on the examination of additional material and comparison with its congeners. This poorly known hypoptopomine species is distributed in the Paraguay and Paraná river draínages.
Aquino, Adriana E. +1 more
core +1 more source
Separability of drag and thrust in undulatory animals and machines [PDF]
, 2014 For nearly a century, researchers have tried to understand the swimming of aquatic animals in terms of a balance between the forward thrust from swimming movements and drag on the body.
Bale, Rahul +5 more
core +3 more sources
Selectivity of fish ladders: a bottleneck in Neotropical fish movement
Neotropical Ichthyology, 2007 Although dozens of fish ladders have been constructed at dams of Brazilian reservoirs, there are few studies evaluating their efficiency as a tool for the conservation of Neotropical ichthyofauna, especially for migratory species. Therefore, the present study evaluated the selectivity of the species that entered and ascended the fish ladder located ...
Agostinho, C S +4 more
openaire +4 more sources
Contributions to the cytogenetics of the Neotropical fish fauna [PDF]
Comparative Cytogenetics, 2017 Brazilian fish cytogenetics started as early as the seventies in three pioneering research groups, located at the Universidade Estadual Paulista (UNESP, Botucatu, SP), Universidade Federal de São Carlos (UFSCar, São Carlos, SP) and Universidade de São Paulo (USP, São Paulo, SP).
Bertollo,Luis Antônio Carlos +3 more
openaire +3 more sources
PLANTS, PEOPLE, PLANET, EarlyView.Biodiversity is threatened by human activities, with extinction debt accumulating rapidly. Many of these activities change the connectivity of populations, fragmenting existing population systems or bringing previously isolated populations or species into contact.
Zhiqin Long +7 more
wiley +1 more source
The cascudos of the genus Hypostomus Lacépède (Ostariophysi: Loricariidae) from the rio Iguaçu basin
Neotropical IchthyologyWe reviewed several large collections of the genus Hypostomus from the rio Iguaçu basin summing up to 793 specimens mainly from the Laboratório de Ictiologia do Departamento de Ecologia e Biologia Evolutiva from Universidade Federal de São Carlos, from ...
Julio César Garavello +2 more
doaj +1 more source
Wildlife Biology, EarlyView.To cope with highly stochastic and/or heterogeneous environmental conditions, animals must balance energy resource allocation across physiological processes. The digestive tract and brain exhibit structural variations under strong developmental and selective pressures that vary across environmental gradients both between and within species.
Yimei Yan +9 more
wiley +1 more source
Neotropical IchthyologyThe species of Charaxwere reviewed by Lucena (1987) who a little later (1989) added three new species to the genus. Examination of recently collected specimens from museum collections documented the more extensive geographic distribution for most species
Naércio A. Menezes +1 more
doaj +1 more source
A 12S rDNA barcode reference library for Neotropical electric fishes (Teleostei, Gymnotiformes) [PDF]
Metabarcoding and MetagenomicsDNA barcodes are instrumental for identifying species from tissues and environmental samples. Metabarcoding-based assessments of biodiversity depend on taxonomically accurate barcode sequence libraries that can be queried to determine which species are ...
Nicole D. Juby +2 more
doaj +3 more sources