Diverse early life-History strategies in migratory Amazonian catfish

The results indicate that juveniles exhibit diverse rearing strategies, rearing in both upstream and estuary environments, which contrasts with the prevailing understanding that juveniles rear in the estuary before migrating upstream; however, this contrasts with some fisheries data that has indicated the presence of alternate spawning and rearing life-histories.

bt.hegg.2015

Format

The data frame 21,007 × 8 contains the following columns:

fish_id	character	fish identifier
distance	numeric	distance from the core to the edge of otolith (um)
sr8786	numeric	otolith 87Sr/86Sr (permil)
corrected_sr8786	numeric	corrected otolith 87Sr/86Sr (permil)
sample_loc	character	location of capture
species	character	amazonian catfish studied
total_length	numeric	fish total length (cm)
weight	numeric	fish body weight (kg)

Details

The dataset contains 87Sr/86Sr values in otoliths of 24 individual Amazonian catfish (16 Brachyplatystoma rousseauxii,5 Brachyplatystoma vaillanti, and 3 Brachyplatystoma filamentosum) from Amazon River basin.

Instrument: LA-MC-ICP-MS (laser ablation multi-collector inductively coupled plasma mass spectrometry)

Beam diameter: 40um

Scan speed: 30um/s

Source

Hegg, J. C. Giarrizzo, T. & Kennedy, B. P. (2015). Diverse early life-history strategies in migratory Amazonian catfish: implications for conservation and management. PloS One, 10(7), e0129697. https://doi.org/10.1371/journal.pone.0129697

Traversing the paper's information via Semantic Scholar ID 20c2e268fbda558db03869110cfc11faf41931f3 using S2miner package

Author

Liuyong Ding, ly_ding@126.com

Concepts

otolith, stable isotope, Sr8786

Examples

### copy data into 'dat'
dat <- bt.hegg.2015
tibble::tibble(dat)
#> # A tibble: 21,007 × 8
#>    fish_id   distance sr8786 corrected_sr8786 sample_loc species                   total_length weight
#>    <chr>        <dbl>  <dbl>            <dbl> <chr>      <chr>                            <int>  <dbl>
#>  1 BR12_2012    2437.  0.709            0.709 Belem      Brachyplatystoma roussea…           75      8
#>  2 BR12_2012    2434.  0.710            0.710 Belem      Brachyplatystoma roussea…           75      8
#>  3 BR12_2012    2431.  0.710            0.710 Belem      Brachyplatystoma roussea…           75      8
#>  4 BR12_2012    2429.  0.710            0.710 Belem      Brachyplatystoma roussea…           75      8
#>  5 BR12_2012    2426.  0.709            0.709 Belem      Brachyplatystoma roussea…           75      8
#>  6 BR12_2012    2424.  0.709            0.709 Belem      Brachyplatystoma roussea…           75      8
#>  7 BR12_2012    2421.  0.710            0.710 Belem      Brachyplatystoma roussea…           75      8
#>  8 BR12_2012    2418.  0.709            0.709 Belem      Brachyplatystoma roussea…           75      8
#>  9 BR12_2012    2416.  0.710            0.710 Belem      Brachyplatystoma roussea…           75      8
#> 10 BR12_2012    2413.  0.709            0.709 Belem      Brachyplatystoma roussea…           75      8
#> # ℹ 20,997 more rows

if (FALSE) {
library(dplyr)
library(ggplot2)

### Sr stable isotope
ggplot(data = dat, aes(distance, sr8786)) +
  geom_line(aes(colour = species, group = fish_id), show.legend = F, na.rm = T) +
  facet_grid(species ~. ,scales = "free_y")+
  labs(
    x = expression(paste("Distance from the core to the edge of otolith (", mu, "m)",
                         sep = "")),
    y = expression(paste(
      {}^"87",
      "Sr/",
      {}^"86",
      "Sr"
    ))
  ) +
  theme_bw() +
  theme(
    panel.grid.major = element_blank(), panel.grid.minor = element_blank(),
    panel.background = element_blank(), axis.line = element_line(colour = "black"),
    text = element_text(size = 10), legend.title = element_blank(),
    plot.title = element_text(face = "bold")
  )
}