Data from: Assessing reproductive behavior important to fisheries management: a case study with red drum, Sciaenops ocellatus
Lowerre-Barbieri, Susan K., University of Florida
Burnsed, Sarah Lyle Walters
Bickford, Joel William, Florida Fish and Wildlife Conservation Commission
Published Dec 08, 2015 on Dryad.
Cite this dataset
Lowerre-Barbieri, Susan K.; Burnsed, Sarah Lyle Walters; Bickford, Joel William (2015). Data from: Assessing reproductive behavior important to fisheries management: a case study with red drum, Sciaenops ocellatus [Dataset]. Dryad. https://doi.org/10.5061/dryad.47bs5
Spawning site selection and reproductive timing affect stock productivity and structure in marine fishes but are poorly understood. Traditionally, stock assessments measure reproductive potential as spawning stock biomass or egg production and do not include other aspects of reproductive behavior. Red drum make an excellent case study to assess these other aspects, as (1) they are highly fecund, pelagic spawners, like most exploited marine fishes; (2) their life cycle is delineated between nursery (estuarine) and adult (coastal and offshore) habitat; and (3) they are managed at these two spatial scales. This study was conducted from August 2012 to December 2013 and integrates data from multiple methods and spatial scales. Aerial surveys were used for large-scale monitoring of aggregations off two known estuarine nursery areas, Tampa Bay and Charlotte Harbor, Florida, USA. Capture-based sampling in Tampa Bay coastal (n = 2581) and estuarine waters (n = 158) was used to assess reproductive state and to confirm coastal spawning. To assess spatial dynamics, we acoustically tagged two population components in the Tampa Bay system, subadults from the estuary (n = 20) and adults from the coastal spawning site (n = 60). Behavioral plasticity was seen in subadult recruitment to coastal habitat, with some subadults maturing and recruiting before or during the spawning season and others (14 of 20 acoustically tagged fish) recruiting at the end of the 2012 spawning season. Both adults and recruited subadults (n = 29) were consequently detected in the Charlotte Harbor array, 132 km to the south. Spawning-site fidelity to the Tampa Bay spawning site occurred at both the population and individual scales. Aggregations consistently occurred in Tampa Bay coastal waters during the spawning season, and approximately two-thirds of tagged adults returned in the 2013 spawning season. A similar proportion of subadults returned to the Tampa Bay spawning site, exhibiting natal homing. However, these first-time spawners arrived later than repeat spawners and were detected over shorter time periods. This study, and others like it, demonstrates how integrating data from individuals tracked over space and time with more traditional population-based sampling is changing our understanding of ecological processes that affect marine fish productivity and our ability to manage for sustainablity.
Mastertelemforpaper: data set includes all data used in the telemetry-based analyses
a. TL=total length at implantation; Surg_min=surgery time in minutes; age =is the age in years assigned based on fin rays for subadult red drum collected in the estuary; fishtype is a categorical variable to distinguish between subadults captured in the estuary (1) and adults captured in coastal waters; system is a categorical variable to assign if fish were detected in Tampa Bay estuary (100), Tampa Bay coastal (1), or Charlotte Harbor coastal (2); num_dates is the number of dates a fish was detected; FishID assigned consecutive numbers to make it easier to follow individual fish; period is a categorical variable to assign the 2012 reproductive period (1); 2013 non-reproductive period (2) and 2013 reproductive period.
Adultreprov2: Data set includes data from the 2007-2008 study (study 1) and fish collected by purse seine and sampled non-lethally in 2012 (study 2).
a. Sex is set up as a character variable (F=female) and numeric (sexx, 2=female); tl=total length; small is a size category (<850 mm TL=small); reproductive phases are based on Brown-Peterson et al. (2011). GSI=gonadosomatic index. Mature categorizes immature (1) and mature fish (2).
Aerial surveys 2012 2013
Aerial surveys 2012 2013: Data set includes the date, location, and method for identifying red drum spawning aggregations.
Subadults: data set includes biological data for subadults sampled in the estuary.
c. Parameters are the same as in the Adultreprov2 with the exception of total_weight which is measured in grams. Age is in years and based on fin rays.
Central western Florida estuarine and coastal waters