Dean whybird

Calibration models were built up over consecutive years — by using a subset of the samples and used to predict the age of the remaining samples and samples from the following year.

Results suggest that when seasonal temporal variability is incorporated into the calibration model, FT-NIR has the ability to predict barramundi age validation R 2 ranged from 0. These models were also able to predict the age of otoliths from and , which were retrieved from long-term storage validation R 2 ranged from 0.

The results from this study have shown the potential for barramundi from the southern Gulf of Carpentaria to be aged quickly and accurately by using FT-NIR. Advances in the aquatic sciences. Shopping Cart: empty. Search our journals. Previous Next Contents Vol 72 9. Abstract Phenotypic plasticity is an important driver of species resilience. Often mediated by epigenetic changes, phenotypic plasticity enables individual genotypes to express variable phenotypes in response to environmental change.

Barramundi Lates calcarifer is a protandrous male-first sequential hermaphrodite that exhibit plasticity in length-at-sex change between geographic regions. However, region-specific relationships between length, sex and DNAm in sequential hermaphrodites were previously unreported.

To investigate these relationships, here we compare DNAm in four conserved vertebrate sex-determining genes in male and female barramundi of differing lengths from three regions of northern Australia.

Despite a strong association between increasing length and male-to-female sex change, the data reveal that DNAm becomes more sex-specific rather than more female-specific with length. Significant differences in DNAm between males and females of similar lengths suggest that female-specific DNAm arises rapidly during sex change, rather than gradually with growth.