نتایج جستجو برای: parrot cichlid
تعداد نتایج: 2978 فیلتر نتایج به سال:
Eight genomes of avian polyomaviruses (APVs) were recovered and sequenced from deceased Psittacula eupatria, Psittacula krameri, and Melopsittacus undulatus from various breeding facilities in Poland. Of these APV-positive samples, six had previously tested positive for beak and feather disease virus (BFDV) and/or parrot hepatitis B virus (PHBV).
avian chlamydiosis is one of the most important infectious diseases of birds. despite the rapid growth of exotic bird populations in iran, there is little or no information on the specific infections that these types of birds carry. in this study, conventional isolation methods were used in cell culture to study occurrence of infection in pet birds. samples from the conjunctiva, choana, and clo...
Evolutionary radiations are responsible for much of the variation in biodiversity across taxa. Cichlid fishes well known spectacular evolutionary radiations, as they have repeatedly evolved into large and phenotypically diverse arrays species. genomes carry signatures past events and, at same time, substrate ongoing evolution. We survey genome-wide data available literature covering 438 cichlid...
Cichlid fishes have evolved tremendous morphological and behavioral diversity in the waters of East Africa. Within each of the Great Lakes Tanganyika, Malawi, and Victoria, the phenomena of hybridization and retention of ancestral polymorphism explain allele sharing across species. Here, we explore the sharing of single nucleotide polymorphisms (SNPs) between the major East African cichlid asse...
It is still debated vigorously whether sexual selection can result in speciation without physical barriers to gene flow. In this study, we used field data and molecular methods to investigate the gold-normal color polymorphism in two endemic cichlid fish species of crater lake Xiloá, Nicaragua. We found significant assortative mating by color in both Amphilophus xiloaensis and A. sagittae. Focu...
Nicaraguan Midas cichlids from crater lakes have recently attracted attention as potential model systems for speciation research, but no attempt has been made to comprehensively reconstruct phylogenetic relationships of this highly diverse and recently evolved species complex. We present a first AFLP (2793 loci) and mtDNA based phylogenetic hypothesis including all described and several undescr...
Differences in brain region size among species are thought to arise late in development via adaptive control over neurogenesis, as cells of previously patterned compartments proliferate, die, and/or differentiate into neurons. Here we investigate comparative brain development in ecologically distinct cichlid fishes from Lake Malawi and demonstrate that brains vary among recently evolved lineage...
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