Reproductive parameters of pacific pomfret Brama australis (Valenciennes 1836) in central Chile using histologic analysis

Elson Leal Faundez, Eduardo Díaz, Gabriel Claramunt

Submited: 2016-06-08 14:03:49 | Published: 2018-03-15 16:52:44

DOI: https://doi.org/10.3856/vol45-issue5-fulltext-25

Abstract


Reproductive traits of the Pacific pomfret (Brama australis) off Chile are described by means of histological gonad analysis. Specifically, this study explores the annual females reproductive cycle and sexual differences in size at maturity of this species using samples from the commercial fleet operating in the coastal zone near Lebu (37º37´ LS). Samples of two periods were analysed. First between October 2011 and May 2012 and then in October, November and December 2014. Results indicated that B. australis exhibited an asynchronous ovaric development, which is a characteristic feature of partial spawners. However, data did not allowed to conclusively establish a main spawning season and it is hypothesised that the reproductive activity occurs from March to October with a winter peak between June and August. In average, females mature at 37,7 cm of fork length (FL). The absence of immature individuals in the samples precluded the construction of a maturity ogive for males. Nevertheless, data suggests that males mature at smaller sizes compared to females. There were no evidence of recent (post-ovulatory follicles) or imminent (hydrated ovocites) reproductive activity in females. This is consistent with previous studies, then suggesting that the reproductive process of B. australis occurs rather off-shore, beyond the fishing zones from which samples were obtained.


Leal Faundez E, Díaz E, Claramunt G. Reproductive parameters of pacific pomfret Brama australis (Valenciennes 1836) in central Chile using histologic analysis. Lat. Am. J. Aquat. Res.. 2018;45(5): 1079-1084. Available from: doi:10.3856/vol45-issue5-fulltext-25 [Accessed 22 Jan. 2019].
Leal Faundez, E., Díaz, E., & Claramunt, G. (2018). Reproductive parameters of pacific pomfret Brama australis (Valenciennes 1836) in central Chile using histologic analysis. Latin American Journal of Aquatic Research, 45(5), 1079-1084. doi:http://dx.doi.org/10.3856/vol45-issue5-fulltext-25