Version 1
: Received: 23 July 2024 / Approved: 25 July 2024 / Online: 26 July 2024 (09:05:33 CEST)
How to cite:
Moreira, I.; Gordo, L. S.; Neves, A.; Vieira, A. R.; Silva, M. I.; Assis, C.; Robalo, J. I.; Francisco, S. M.; Sequeira, V. Age, Growth, and Reproduction of the Axillary Seabream Pagellus acarne from the Portuguese Atlantic West Coast. Preprints2024, 2024072078. https://doi.org/10.20944/preprints202407.2078.v1
Moreira, I.; Gordo, L. S.; Neves, A.; Vieira, A. R.; Silva, M. I.; Assis, C.; Robalo, J. I.; Francisco, S. M.; Sequeira, V. Age, Growth, and Reproduction of the Axillary Seabream Pagellus acarne from the Portuguese Atlantic West Coast. Preprints 2024, 2024072078. https://doi.org/10.20944/preprints202407.2078.v1
Moreira, I.; Gordo, L. S.; Neves, A.; Vieira, A. R.; Silva, M. I.; Assis, C.; Robalo, J. I.; Francisco, S. M.; Sequeira, V. Age, Growth, and Reproduction of the Axillary Seabream Pagellus acarne from the Portuguese Atlantic West Coast. Preprints2024, 2024072078. https://doi.org/10.20944/preprints202407.2078.v1
APA Style
Moreira, I., Gordo, L. S., Neves, A., Vieira, A. R., Silva, M. I., Assis, C., Robalo, J. I., Francisco, S. M., & Sequeira, V. (2024). Age, Growth, and Reproduction of the Axillary Seabream Pagellus acarne from the Portuguese Atlantic West Coast. Preprints. https://doi.org/10.20944/preprints202407.2078.v1
Chicago/Turabian Style
Moreira, I., Sara Maria Francisco and Vera Sequeira. 2024 "Age, Growth, and Reproduction of the Axillary Seabream Pagellus acarne from the Portuguese Atlantic West Coast" Preprints. https://doi.org/10.20944/preprints202407.2078.v1
Abstract
The Axillary Seabream Pagellus acarne is of economic importance for recreational and commercial fisheries in the Atlantic and the Mediterranean, but a decline in total landings has been observed and raised some concern. Although biological information on the species has been provided for the Atlantic and Mediterranean, in the Portuguese continental slope data is restricted to the southern part of the country, which points to the relevance of the present work. A total of 520 individuals, between 7.8 cm and 39.9 cm TL, were monthly collected from September 2020 to August 2022 from commercial landings of fishing vessels operating off mainland Portugal, and used to study age and growth, the reproductive strategy and the annual sexual cycle. Age varied between 0 years (7.8 cm TL) and 15 years (34.2 cm TL) and the von Bertalanffy growth parameters were estimated from whole-otolith readings (L∞ = 35.2 cm, k = 0.133 yr–1 and t 0 = –2.78 yr). Pagellus acarne proved to be a protandric hermaphrodite species with males prevailing until 28.0 cm TL and females between 28.0 cm and 34.0 cm TL with a brief sex change phase. Females presented asynchronous oocyte development with a batch spawning pattern. The spawning season occurred from April to October with a spawning peak between June and August aas shown by histological analysis of the gonads and high levels of GSI during the period.
Keywords
small scale fishery; otolith; von Bertalanffy; histology; reproductive strategy; Portugal
Subject
Biology and Life Sciences, Aquatic Science
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
