Spatiotemporal variation in life history traits of three small fishes in streams of south‐eastern Brazil

Lourenço, Luzia S.; Souza, Ursulla Pereira; Fernandes, Izaías Médice; Petrere, Miguel

doi:10.1111/fme.12114

Cited by 8 publications

(5 citation statements)

References 52 publications

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“…Based on the L50, the total length ranged from 2.05 cm to 4.2 cm for individuals of Astyanax sp. congeneric species, from 4.1 cm to 4.5 cm for P. stramineus, from 2.79 cm to 3.75 cm to P. argentea and higher than 3.2 cm for S. hetero don (Gomiero et al, 2007;Castro et al, 2010;Gonçalves et al, 2011;Lourenço et al, 2015).…”

Section: Suitability Curves and Regression Models For Fish Densitymentioning

confidence: 89%

Physical habitat simulation for small-sized characid fish species from tropical rivers in Brazil

et al. 2018

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Physical habitat simulation (PHABSIM) is an important step of the instream flow incremental methodology (IFIM), which is applied to establish environmental flow regimes. This study applied the PHABSIM in two reaches of the Velhas river basin, whose long-term discharges are similar but are under different degrees of impact. Suitability curves were obtained for fish species using traditional methods (Astyanax sp., Piabarchus stramineus, Piabina argentea and Serrapinnus heterodon) and generalized additive models for fish density (Astyanax sp., P. argentea and S. heterodon). The results of habitat use depended on the method for curves generation. Applying the suitability curves by traditional methods, different discharge scenarios were simulated. The flow increasing from a dry scenario to a discharge of 1 year of return promotes a possible habitat increase for all species. However, the same hydrological flow percentiles produce different habitat proportions in different rivers. This work demonstrates that regardless of how suitability curves for the Neotropical species are generated, caution should be taken when applying them. However, the PHABSIM method allows more complex analyses than the traditional approaches based on minimal flow estimations, which is usually applied in South America.

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Section: Suitability Curves and Regression Models For Fish Densitymentioning

confidence: 89%

Physical habitat simulation for small-sized characid fish species from tropical rivers in Brazil

et al. 2018

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“…This might be due to the warmwater environment in the SA, which consists of seawater with high temperature and salinity, whereas the water system in NA is coastal water with low salinity and high‐nutrient salt (Beardsley et al 1985; Chern and Wang 1990; Ichikawa and Chaen 2000). The water temperature difference is a known driver of geographical variation in fish maturation rates (Farley et al 2014; Lourenco et al 2015; Wang et al 2008), as ectotherms tend to grow faster and mature earlier at warmer temperatures than at cooler temperatures (Angilletta et al 2004; Brunel and Dickey‐Collas 2010; Matta et al 2016). Our results also suggested that SST significantly affected the maturity schedules in female Hairtail (Table 4).…”

Section: Discussionmentioning

confidence: 99%

Maturity of Hairtail Varies with Latitude and Environment in the East China Sea

et al. 2020

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Early maturity of economically important fish has become a global issue, which might affect the reproductive potential of fish stocks. We used the samples that were collected in a fisheries-independent survey in the East China Sea annually around the end of August from 2002 to 2017 to investigate the maturation progress of female Hairtail Trichiurus japonicus in response to (1) spatial variation, (2) environmental variation, and (3) CPUE. The preliminary analysis indicated that the gonads of Hairtail in the southern area and the northern area began to develop at similar anal length (around 140-150 mm), but the development was faster in the southern area than in the northern area. The proportion of matured fish was significantly higher in the southern area than in the northern area in the group of fish with 170-210 mm anal length. Based on generalized additive models, we found that temperature and CPUE could affect the maturation schedules of female Hairtail in the East China Sea. The relationship between sea surface temperature and the probability of maturity was close to an s-curve, while the stock density had an approximately negative effect on the degree of precocious puberty.

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“…The presence of young fish in the lift may be due to the attraction of this waterfall at its entrance or these animals may be carrying out a migration of the regional colonization to the dam's upstream and not a reproductive migration. Increasing regional temperature and rainfall during the study period may have influenced the gonads maturation, as these factors are environmental variables that influence individuals, so that conditions in the spawning season are conducive to offspring survival and growth (Lourenço et al, 2015, Vazzoler, 1996.…”

Section: Discussionmentioning

confidence: 99%

Reproductive biology of pequira Bryconamericus stramineus (Eigenmann, 1908) in Funil Reservoir-MG, Brazil

et al. 2019

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In order to evaluate aspects of reproductive biology of the “pequira” ( Bryconamericus stramineus) in the elevator of the Funil Dam - MG, fish capture was carried out from November 2008 to January 2009 and 317 individuals were collected. The mean standard length (SL) of the population was 4.96 cm and mean weight 1.80 g. The females had SL of 5.0 cm, while males had a SL of 4.6 cm. A sex ratio of 2.20: 1 (females: male) was observed. Our results show that 73% of the individuals analyzed were considered adults. The species presented low fecundity, mean of 470.9 oocytes per female and a mean diameter of 221.08 μm, with an increase in oocyte diameter over the evaluation period. The length of the first gonadal maturation was estimated at 5.0 cm. The results obtained in this work suggest that the reproductive cycle of the species occurs in the analyzed period. Although this species does not have migratory reproductive habits, the presence of adults in the reproductive stage was observed in the transposition area, which suggests a search for new environments for spawning.

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Spatiotemporal variation in life history traits of three small fishes in streams of south‐eastern Brazil

Cited by 8 publications

References 52 publications

Physical habitat simulation for small-sized characid fish species from tropical rivers in Brazil

Physical habitat simulation for small-sized characid fish species from tropical rivers in Brazil

Maturity of Hairtail Varies with Latitude and Environment in the East China Sea

Reproductive biology of pequira Bryconamericus stramineus (Eigenmann, 1908) in Funil Reservoir-MG, Brazil

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