6 documents found, page 1 of 1
Composition of gastrointestinal content, protease and lipase activities in summ...
Almeida,Ana Paula Gottlieb; Zardo,Everton Luis; Toni,Candida; Behr,Everton Rodolfo; Silva,Leila Picolli da; Vieira,João Paes; Loro,Vania LúciaABSTRACT The aim of this study was to determine the composition of gastrointestinal content and protease and lipase activities in summer and winter as well as to evaluate the relationship between digestive enzyme activity and centesimal composition of gastrointestinal content and feeding habits of two omnivorous species, Rhamdia quelen (Quoy & Gaimard, 1824) and Pimelodus maculatus (LaCèpede, 1803), and of two ...
Population structure and reproductive biology of Loricariichthys melanocheilus ...
Zardo,Éverton Luís; Behr,Everton RodolfoThe objective of this study was to analyze population structure (spatial distribution, seasonal distribution and distribution by length classes, sex ratio and length-weight relationship) and aspects of the reproductive biology of Loricariichthys melanocheilus. Fish were sampled bimonthly using gillnets and trammel nets in lentic and lotic environments in the rio Ibicuí, between the years 2000 and 2001. Were col...
Gill rakers in six teleost species: influence of feeding habit and body size
Almeida,Ana Paula Gottlieb; Behr,Everton Rodolfo; Baldisserotto,BernardoThis study analyzed the structure of the gill rakers of Parapimelodus valenciennis and Parapimelodus nigribarbis (planktivorous), Serrasalmus maculatus and Hoplias malabaricus (piscivorous), Iheringichthys labrosus (benthophagous) and Hypostomus commersonii (detritivorous) and related it with the body size and feeding habits of these species. The species of Parapimelodus and H. commersonii showed long, filiform...
Morphometric parameters comparisons of the digestive tract of four teleosts wit...
Becker,Alexssandro Geferson; Gonçalves,Jamile Fabbrin; Garcia,Luciano Oliveira; Behr,Everton Rodolfo; Graça,Dominguita Luhers; Kurtz Filho,MárioThe present study compared some morphometric parameters of the digestive tract of four teleosts with different feeding habits: traira (Hoplias malabaricus, carnivore), silver catfish (Rhamdia quelen, omnivore), hassar (Hoplosternum littorale, omnivore), and grass carp (Ctenopharyngodon idella, herbivore). The digestive tract was removed from fish collected from nature and fixed for some morphometric analyses, s...
Ação do tempo e da forma de suplementação alimentar com Artemia franciscana sob...
Behr,Everton Rodolfo; Tronco,Ana Paula; Radünz Neto,JoãoO presente trabalho foi realizado com o objetivo de verificar o efeito da suplementação alimentar com Artemia franciscana no desempenho de larvas de jundiá (Rhamdia quelen). Os tratamentos foram: T1 - Suplementação com náuplios de Artemia durante 7 dias; T2 - Suplementação com cistos de Artemia durante 7 dias; T3 - Suplementação com náuplios de Artemia durante 3 dias; T4 - Suplementação com cistos de Artemia du...
Urophysial and pituitary extracts for spawning induction in teleosts
Behr,Everton Rodolfo; Baldisserotto,Bernardo; Parra,Walter Garcia; Brandão,Deodoro Atlante; Herke,ZolstSeveral 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 malabaricus, Rhamdia quelen and Cyprinus carpio. The amount of UE injected was 1.0 to 3.0mg/kg L.W. (single dose) and CPH 3.0 to 4.0mg/kg L.W. (two doses). The ap...