Results 61 to 70 of about 8,237 (246)

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  

Antagonistic Rewiring and Turnover Patterns in a Neotropical Fish–Parasite Metanetwork

Freshwater Biology, Volume 70, Issue 7, July 2025.
ABSTRACT Integrating beta‐diversity and network analyses is an emerging approach for understanding the spatial structure of species communities. For instance, although the presence of hosts affects parasite species distribution, environmental factors can either restrict or promote the occurrence of certain parasite species by changing the abundance of ...
Ana Paula Lula Costa, Paulo R. Guimarães, Andre A. Padial   +2 more
wiley   +1 more source

Organização trófica da assembleia de peixes de uma lagoa costeira subtropical, Santa Catarina, Brasil [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas, Programa de Pós-graduação em Ecologia, Florianópolis, 2013O presente estudo teve como objetivo investigar a organização trófica da assembleia de peixes da ...
Sticca, Sarah Carvalho
core  

Shared and unique patterns of embryo development in extremophile poeciliids [PDF]

, 2011
Background: Closely related lineages of livebearing fishes have independently adapted to two extreme environmental factors: toxic hydrogen sulphide (H2S) and perpetual darkness.
Ingo Schlupp, Martin Plath, R. Brian Langerhans, Rüdiger Riesch, Vincent Laudet   +4 more
core   +4 more sources

Influência da luminosidade no crescimento de Jundiá (Rhamdia quelen) / Influence of luminosity on the growth of Jundiá (Rhamdia quelen)

Brazilian Journal of Development, 2022
Esta pesquisa foi realizada com objetivo de avaliar o efeito da luminosidade sobre o crescimento de juvenis de jundiá. Foram utilizados 225 peixes (70,53±3,68g), distribuídos em 15 caixas de 500 L, em um delineamento inteiramente casualizado, alimentados três vezes ao dia com ração comercial contendo 36% PB e granulometria 1,5 mm, durante 45 dias.
Jânderson Rocha Garcez, Leonardo Aluisio Baumgartner, Sara Ugulino Cardoso, Micáila Bolzon Gonzalez, Monica Regina de Matos, Weverson Ailton da Silva, Robie Allan Bombardelli   +6 more
openaire   +1 more source

Larger Fish Upstream: Testing the Drivers of Fish Longitudinal Size Distribution in a Stream

Freshwater Biology, Volume 70, Issue 7, July 2025.
ABSTRACT The “larger fish upstream pattern” (LFUP), where fish size increases from river mouths toward headwaters, is widely documented, but the drivers remain unclear. Here, we tested whether LFUP is related to species reproductive strategies or environmental factors (differential growth, predation, competition). Using historical data (1994–1998) from
Pedro Wolf, Piatã Marques, Rosana Mazzoni   +2 more
wiley   +1 more source

A new cave species of Rhamdia (Siluriformes: Heptapteridae) from Serra do Ramalho, northeastern Brazil, with notes on ecology and behavior

Neotropical Ichthyology
Rhamdia enfurnada, a new troglobitic (exclusively subterranean) catfish, is described from the Gruna do Enfurnado, Serra do Ramalho, southwestern Bahia State, middle São Francisco River basin.
Maria Elina Bichuette, Eleonora Trajano
doaj   +1 more source

Urophysial and pituitary extracts for spawning induction in teleosts Extratos urofisário e hipofisário para indução da desova em teleósteos

Ciência Rural, 2000
Several studies have suggested that the caudal neurosecretory system could act on fish reproduction. The aim of this study was to compare the effect of urophysial extract (UE) and carp pituitary homogenate (CPH) on the induction of spawning in Hoplias ...
Everton Rodolfo Behr, Bernardo Baldisserotto, Walter Garcia Parra, Deodoro Atlante Brandão, Zolst Herke   +4 more
doaj   +1 more source

Anestesia e toxicidade aguda do eugenol aplicado em juvenis de jundiá, Rhamdia quelen [PDF]

, 2014
TCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Agrárias. Curso de Engenharia de Aquicultura.Durante o período de estágio foram realizados três experimentos envolvendo o agente anestésico eugenol, que foram desenvolvidos no ...
Pallamin, Rafael Tanganelli
core  

Probiotic actions of Bacillus cereus var. toyoi and Saccharomyces boulardii in silver catfish (Rhamdia quelen) larvae culture

Revista Brasileira de Zootecnia, 2012
The objective of this study was to evaluate the use of Bacillus cereus var. toyoi and Saccharomyces boulardii as probiotics to improve Rhamdia quelen culture. Six hundred larvaes (0.16±0.07 g) were divided in three replicate tanks (25-L recirculation, 20
Diego Moreira de Souza, Gabriel Bernardes Martins, Sérgio Renato Noguez Piedras, Juvêncio Luís Osório Fernandes Pouey, Ricardo Berteaux Robaldo, Fabio Pereira Leivas Leite   +5 more
doaj   +1 more source