AI Article Synopsis
- - The age and growth rate of the giant electric ray were analyzed through growth bands in the vertebrae of 245 specimens, revealing differences in size and age between sexes, and suggesting that band pairs form annually, probably in April.
- - Multiple models, including the von Bertalanffy growth function, were used to analyze age data from female specimens, indicating an average size of 81.87 cm total length and a growth rate of 0.17 years.
- - The study concluded that the giant electric ray is of moderate size and longevity, and is classified as a fast-growing elasmobranch species, with age estimation supported by biological indicators like birth date and growth band formation.
Article Abstract
The age and growth rate of the giant electric ray, , was estimated using growth bands deposited in the vertebral centra of 245 specimens. Differences in size and age distribution were found between the sexes, a pattern that suggests the annual deposition of band pairs, possibly occurring in April. Multimodel inference and back-calculation were performed to three age data sets of females considering their reproductive cycle and time of capture, among which the von Bertalanffy growth function was found to be the most appropriate ( = 81.87 cm TL, = 0.17 year). Our research supports the idea that age can be determined via biological features such as birth date and growth band periodicity. We concluded that is of a moderate body size, moderate longevity and is a fast-growing elasmobranch species.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8749751 | PMC |
| http://dx.doi.org/10.3390/ani12010019 | DOI Listing |
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