2 publications sur les Cichla
Posté : 10 oct. 2010 09:32
Hello!
J'avais oublié d'en parler mais voici 2 publications concernant le genre Cichla:
Dans un prochain volume de Neotropical Ichthyology:
Feeding dynamics of Cichla kelberi Kullander & Ferreira, 2006
introduced into an artificial lake in southeastern Brazil
Gilberto Aparecido Villares Junior and Leandro Muller Gomiero
The objective of this study was to characterize the seasonally of the diet of Cichla kelberi in an artificial lake in Leme-SP,
determining the food items and their relation to the sex and gonadal maturity of the fish sampled. The diet of C. kelberi presents
a dynamic in three different periods: winter months were characterized by low feeding activity and a high concentration of
undetermined fish; increase in feeding activity occurred in the spring, with Tilapia sp. being the dominant food item; and a
high rate of cannibalism was observed in the summer and early fall. The plasticity in the composition of the diet was marked by
quantity of prey available during the different periods of the year, and the reproductive period.
http://www.scielo.br/pdf/ni/2010nahead/aop1010.pdf
dans Molecular Phylogenetics and Evolution
Population genetic structure of Cichla pleiozona (Perciformes: Cichlidae) in the
Upper Madera basin (Bolivian Amazon): Sex-biased dispersal?
F.M. Carvajal-Vallejos, F. Duponchelle, J.P. Torrico Ballivian, Nicolas Hubert, J. Nuñez Rodríguez, P. Berrebi, S. Sirvas Cornejo, J.-F. Renno
This study investigates the population structure of the Tucunaré (Cichla pleiozona) in the Bolivian Amazon
(Upper Madera) by using nuclear (EPIC-PCR, 67 individuals) and mitochondrial (Control Region, 41 published
and 76 new sequences) DNA analyses, in relation with ecological (water quality: muddy, clear and
mix) and geographic factors. Our analyses of both markers showed the highest diversity in clear waters
(Yata, Middle and Upper Iténez), and the existence of two populations in muddy waters (Sécure and
Ichilo) and one in mix waters (Manuripi). On the other hand, mitochondrial analyses identified three
populations in clear waters where nuclear analyses identified a panmictic population. The highest diversity
observed in the Yata-Iténez system suggests that an aquatic refuge occurred during the past in this
area. The possible explanations for the observed discrepancy between nuclear and mitochondrial markers
are discussed, and a sex-biased dispersal seems to be the most plausible hypothesis in the light of the
available information and field observations.
http://www.sciencedirect.com/science?_o ... rticle.pdf
A++
Yann
J'avais oublié d'en parler mais voici 2 publications concernant le genre Cichla:
Dans un prochain volume de Neotropical Ichthyology:
Feeding dynamics of Cichla kelberi Kullander & Ferreira, 2006
introduced into an artificial lake in southeastern Brazil
Gilberto Aparecido Villares Junior and Leandro Muller Gomiero
The objective of this study was to characterize the seasonally of the diet of Cichla kelberi in an artificial lake in Leme-SP,
determining the food items and their relation to the sex and gonadal maturity of the fish sampled. The diet of C. kelberi presents
a dynamic in three different periods: winter months were characterized by low feeding activity and a high concentration of
undetermined fish; increase in feeding activity occurred in the spring, with Tilapia sp. being the dominant food item; and a
high rate of cannibalism was observed in the summer and early fall. The plasticity in the composition of the diet was marked by
quantity of prey available during the different periods of the year, and the reproductive period.
http://www.scielo.br/pdf/ni/2010nahead/aop1010.pdf
dans Molecular Phylogenetics and Evolution
Population genetic structure of Cichla pleiozona (Perciformes: Cichlidae) in the
Upper Madera basin (Bolivian Amazon): Sex-biased dispersal?
F.M. Carvajal-Vallejos, F. Duponchelle, J.P. Torrico Ballivian, Nicolas Hubert, J. Nuñez Rodríguez, P. Berrebi, S. Sirvas Cornejo, J.-F. Renno
This study investigates the population structure of the Tucunaré (Cichla pleiozona) in the Bolivian Amazon
(Upper Madera) by using nuclear (EPIC-PCR, 67 individuals) and mitochondrial (Control Region, 41 published
and 76 new sequences) DNA analyses, in relation with ecological (water quality: muddy, clear and
mix) and geographic factors. Our analyses of both markers showed the highest diversity in clear waters
(Yata, Middle and Upper Iténez), and the existence of two populations in muddy waters (Sécure and
Ichilo) and one in mix waters (Manuripi). On the other hand, mitochondrial analyses identified three
populations in clear waters where nuclear analyses identified a panmictic population. The highest diversity
observed in the Yata-Iténez system suggests that an aquatic refuge occurred during the past in this
area. The possible explanations for the observed discrepancy between nuclear and mitochondrial markers
are discussed, and a sex-biased dispersal seems to be the most plausible hypothesis in the light of the
available information and field observations.
http://www.sciencedirect.com/science?_o ... rticle.pdf
A++
Yann