Comparative and Functional Analysis of Exosomal microRNAs During Semelparous Reproduction in Ayu Fish ().

As a life history strategy, some semelparous organisms, such as the ayu fish (), reproduce only once in their lifetime and then die. They invest heavily in their single reproductive event, producing many offspring. However, the regulatory mechanisms that trigger mortality after reproduction are not well understood.

Characterization and localization of cyclin B3 transcript in both oocyte and spermatocyte of the rainbow trout ().

B-type cyclins are regulatory subunits with distinct roles in the cell cycle. To date, at least three subtypes of B-type cyclins (B1, B2, and B3) have been identified in vertebrates. Previously, we reported the characterization and expression profiles of cyclin B1 and B2 during gametogenesis in the rainbow trout ().

Construction of a Genomic Bacterial Artificial Chromosome (BAC) Library for the Prawn Macrobrachium rosenbergii and Initial Analysis of ZW Chromosome-Derived BAC Inserts.

Knowledge on sex determination has proven valuable for commercial production of the prawn Macrobrachium rosenbergii due to sex dimorphism of the male and female individuals. Previous studies indicated that prawn sex is determined by a ZW-ZZ chromosomal system, but no genomic information is available for the sex chromosome. Herein, we constructed a genomic bacterial artificial chromosome (BAC) library and identified the ZW-derived BAC clones for initial analysis of the sex chromosomal DNA sequence.