Shallow population histories in deep evolutionary lineages of marine fishes: insights from sardines and anchovies and lessons for conservation

Article Abstract:

Shallow population genetic architectures in deep evolutionary lineages of marine fish species were investigated by reviewing genetic evidence from allozyme and mitochondrial DNA datasets for anchovies and sardines. In addition, factors that influence mitochondrial DNA diversity were examined to gain a better understanding of population regulation in marine fishes. Results showed that regional populations of anchovies and sardines are attenuated by periodic extinctions and recolonizations, apparently resulting in low levels of nucleotide diversity and shallow population histories.

Biological diversity conservation, Biodiversity conservation, Sardines, Anchovies

---

Molecular insights into the population structures of cosmopolitan marine fishes

Article Abstract:

The population genetic structure of widely distributed pelagic marine fishes was investigated. The study focused on four marine fish species with circumtropical populations as well as four species of cosmopolitan temperate fishes with disjunct distributions. Results showed that continuously distributed marine fish species had population structures that are shallow but significant within an ocean basin. In contrast, greater intraspecific genetic divergence was found within discontinuously distributed marine fishes.

Molecular genetics

---

Mitochondrial DNA diversification and population structure in fishes from the Gulf of Mexico and western Atlantic

Article Abstract:

Spatial and temporal variation in restriction sites of mitochondrial DNA among seven species of marine fishes from the northern Gulf of Mexico and the southeast US Atlantic was investigated. The aim of the study was to find out whether population structure exists in species with an apparent large dispersal potential. Results showed that dispersal and gene flow in three sciaenids follow an isolation-by-distance model. Furthermore, population structuring was nonexistent in the three reef-associated species.

Gene frequency

Similar abstracts:

• Abstracts: Clustering of marine bacteria in seawater enrichments. Natural assemblages of marine bacteria exhibiting high-speed motility and large accelerations
• Abstracts: Biodegradation of free phytol by bacterial communities isolated from marine sediments under aerobic and denitrifying conditions
• Abstracts: A new sensitive, whole-cell hybridization technique for detection of bacteria involving a biotinylated oligonucleotide probe targeting rRNA and tyramide signal amplification
• Abstracts: Mannan-degrading enzymes from Cellulomonas fimi. Cellobiose dehydrogenase, an active agent in cellulose depolymerization
• Abstracts: Essential contribution of caspase 3/CPP32 to apoptosis and its associated nuclear changes. Apaf1 is required for mitochondrial pathways of apoptosis and brain development

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.