Data for: Effects of climate-driven hydrological changes in reproduction of Amazonian floodplain fishes
Description
This is the dataset used by Röpke et al. (2022) in the study published at Journal of Applied Ecology to investigate: 1) whether the proportion of reproductive females could be negatively affected by long, drier low-water seasons and short, abrupt rising-water periods, and if such effects were stronger in fished species; 2) if the size to reach sexual maturity and the average body size of ripe females have decreased over recent years and if such changes were more evident in fished species; 3) whether changes in these parameters could be associated with a decrease in the abundance of larger adult females, and whether such a decrease was higher in fished species. The study was conducted in Lago Catalão, a floodplain lake in the Amazon, located at the confluence of Amazon and Negro rivers. The dataset includes data collected monthly from October 1999 until October 2018 from surveys using ten gillnets of several mesh sizes (see Röpke et al., 2017 Scientific Reports for further information). Each individual was identified to species level, sex and gonadal maturation were determined based on dissection, body size was taken in standard length (mm). Hydrological dataset was obtained from Manaus’s harbor and annual descriptors of flooding cycle follow the description of Röpke et al. (2017). Two set of datasets are available here as csv files. One, IR_Catalao2019_reproduction.csv used to test our first hypothesis, brings information on annual proportion of females in reproduction of 16 fish species (please see details in the published manuscript), Hydrological Year (Hydrol.Year), which represents roughly the year as starting in October and ending in March; the Gregorian calendar Year (Greg.Year); the annual number of females in reproduction (N_females); total number of adult females captured (Total); duration, in days, of the low water season (LowWat_Duration); duration, in days, of rising water season (Rising_Duration); minimum water of the year (minWaterLevel); velocity of the flooding (RisingIntensity); amplitude of variation in water level (Hyd.Cycl.Intensity); first axis of principal component analysis based on hydrologic attributes using 110 year of hydrologic data (PC1); species name; family and genus. The second dataset, IR_Catalao2019_L50.csv used to test the second and third hypothesis, brings information on standard length in millimeters (BodySize); sex of individuals only female (F) and immature (I) were considered in the study (Sex); rankings of gonadal development, 1- immature, 2-6 adult females with ovaries with different stages of development regarding the annual reproductive cycle (GonadMaurity), sexual maturity, scoring 0 for immature and 1 for mature females (SexMaturity); Gregorian calendar year (Year); the taxonomic categories family and genus; and fishing pressure (Fishing).