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Mostrando ítems 61-70 de 493
The decline of Falkland Islands penguins in the presence of a commercial fishing industry
(Sociedad de Biología de Chile, 2002)
A new species of Astyanax (Characiformes: Characidae) from Costa Rica and Panama, with a key to the lower Central American species of the genus
(2018-01-01)
Astyanax anai, a new species of characid fish, is described from the Sixaola River basin, eastern Costa Rica–western Panama, Central America. The new species can be distinguished from all other congeners by the following ...
Scale morphology of Prochilodus lineatus with emphasison the scale epithelium
(Instituto Internacional de Ecologia, 2013-8)
The fish body is entirely covered by a thin, smooth and glandular epidermis, closelyattached to the scales inserted on the dermis. The descriptive work on this tissue dates to twentyor thirty years ago, bears very little ...
Grass-dominated stream sites exhibit low fish species diversity and dominance by guppies: an assessment of two tropical pasture river basins
(Springer, 2009-10-01)
This study investigates whether (1) structural configuration (considering substrate composition, wood debris, marginal and riparian vegetation) of streams suggests habitat simplification on a basin scale and (2) fish ...
Importance of local and landscape variables on multiple facets of stream fish biodiversity in a Neotropical agroecosystem
(2020-01-01)
Few studies have considered the effects of environmental variables at different spatial scales on Neotropical stream biodiversity. Furthermore, scale-related studies mostly include only one facet of biodiversity. To determine ...
First record of chilodonella hexasticha (ciliophora: Chilodonellidae) in brazilian cultured fish: A morphological and pathological assessment
(2013-01-16)
Chilodonelids are small ciliated protozoans found worldwide and can be dangerous in culture conditions. This study presents morphometric data on the ciliate Chilodonella that is found in cultured Nile tilapia (Oreochromis ...
Triploid or hybrid tetra: Which is the ideal sterile host for surrogate technology?
(2018-03-01)
This work was aimed at developing an effective procedure to obtain sterile ideal host fish in mass scale with no endogenous germ cells in the germinal epithelium, owning permanent stem-cell niches able to be colonized by ...
Bite by moray eel
(Universidade Estadual Paulista (Unesp), Centro de Estudos de Venenos e Animais Peçonhentos (CEVAP), 2008-01-01)
Injuries caused by moray eels are not a common problem, but are distributed throughout the globe, affecting mainly fishermen while manipulating hooked or netted fish. on a lesser scale, scuba divers and snorkelers, practicing ...
TECHNICAL EFFICIENCY OF TILAPIA PRODUCTION IN ILHA SOLTEIRA, SP: A NONPARAMETRIC ANALYSIS
(Inst Zootecnia, 2015-01-01)
The objective of this study was to analyze the performance of tilapia production units using tank networks for fish production in the Ilha Solteira reservoir, SP. The degree of productive efficiency and the differential ...
Bite by moray eel
(2008-01-01)
Injuries caused by moray eels are not a common problem, but are distributed throughout the globe, affecting mainly fishermen while manipulating hooked or netted fish. On a lesser scale, scuba divers and snorkelers, practicing ...