Consulta: subjectFacets:"Silverside fish"
Registros recuperados: 2
Data/hora: 14/06/2024 03:07:46

Anticholinesterase effect of eserine (physostigmine) in fish and crustacean species
Provedor de dados: 52
Autores: Monserrat,José M.; Bianchini,Adalto.
The kinetic characteristic (Km) of cholinesterase from the crab Chasmagnathus granulata, the shrimp Farfantepenaeus paulensis and the fish Odontesthes bonaeriensis were compared and correlated with the anticholinesterasic effect of eserine (physostigmine). For the crustaceans, the estimated Km values were about 5-8 times higher than that estimated for the fish (0.04 mM). In the crab and the shrimp, the concentration of eserine which inhibited 50% of cholinesterase activity (IC50) was estimated as 5.33x10-4 and 4.33x10-4 mM, respectively. In both cases, it was significantly higher (P &lt; 0.05) than that estimated for the fish larvae (7.43x10-5 mM). A high Km could reflect a lower affinity of the cholinesterase for its natural substrate, acetylcholine, or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eserine; Physostigmine; Acetylcholinesterase; Fish; Silverside fish; Crustacean.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000100009

The genus Basilichthys (Teleostei: Atherinopsidae) revisited along its Chilean distribution range (21° to 40° S) using variation in morphologyand mtDNA
Provedor de dados: 97
Autores: VÉLIZ,DAVID; CATALÁN,LAURA; PARDO,RODRIGO; ACUÑA,PATRICIO; DÍAZ,ANGIE; POULIN,ELIE; VILA,IRMA.
There is still doubt as to the number of species of the freshwater Chilean ichthyofauna, 64 % of which have conservation problems. One of the groups is that of the silversides of the genus Basilichthys. Three morphological species of this genus have been described in Chile with disjoint distributions: Basilichthys semotilus, B. microlepidotus and B. australis; the latter two overlap in distribution only in the Aconcagua River and are not easily distinguishable by morphological and meristic characters. In order to evaluate the efficacy of identification of these species by molecular techniques, we analyzed the sequence of 9 % of the mitochondrial DNA (Control Region and COI) of individuals from the Loa River (21°41' S) to the Valdivia River (39°50' S),...
Tipo: Journal article
Palavras-chave: COI; Control Region; Drainages; MtDNA; Silverside fish.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100004