Age, growth, and reproductive biology of the Atlantic spadefish Chaetodipterus faber in southern Brazil

Age and reproduction of the southern king croaker Menticirrhus americanus in subtropical South Atlantic environments

“…Moreover, this is a characteristic of species with split spawning that invest a great amount of energy in gonadal development. A similar observation was made by other authors (Santos et al 2017, Maciel et al 2018, Soeth et al 2018. Spatially, in this study, younger individuals were dominant (1-2 years) at P1.…”

“…Intraspecific biological parameters (e.g. age and reproduction) help understand the habitat use of a species (Vaz-dos-Santos et al 2007, Soeth et al 2018 and provide important information for decision-making in the implementation of management and conservation plans. Identifying the reproductive period and the first maturity of a fish population helps establish data-based management decisions such as defining closed seasons and determining the mesh sizes that may have a negative impact on the fish populations (Santos et al 2015).…”

Sagitta otolith of three demersal species in a tropical environment

“…On the other hand, the aspect ratio of the otoliths from C. nobilis increased until specimens were 20 cm TL long and kept stable onwards. Note that the length at first maturity for this species is about 21 cm TL in a neighboring area (da Silva et al, 2019). Here, again, a change in habitat for juveniles and adults may be occurring.…”

“…These structures assist the hearing and perception of the external environment (Ladich & Schulz-Mirbach, 2016). Otoliths are excellent tools for various studies of fish populations such as: habitat use and connectivity between populations using the chemistry of the otolith (Carvalho et al, 2017;Maciel et al, 2020), environmental stress indicated by the deposition of vaterita (Carvalho et al, 2019a;Holmberg et al, 2019), and age and growth (Soeth et al, 2018;Maciel et al, 2018).…”

“…Several studies have described the morphology and morphometry of otoliths of species important for artisanal and recreational fisheries in southeastern-southern Brazil (Siliprandi et al, 2014;Brenha-Nunes et al, 2016;Maciel et al, 2019;Dal Negro et al, 2021). Conversely, few studies have been conducted in northeastern Brazil, making it impossible future studies of connectivity or fishing stocks for species with wide distribution along the Brazilian coast (Freire et al, 2017;Assis et al, 2020;Bot et al, 2020).…”