English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The views and opinions expressed or implied in this article are those of the author (or authors) and do not necessarily reflect the position of the National Marine Fisheries Service, NOAA. Abstract—The Atlantic croaker (Micropogonias undulatus) is an important commercial species in the Gulf of Mexico, but this stock has been reduced historically as bycatch in other fisheries. Sagittal otoliths (N=190) were removed from larval and early juvenile Atlantic croaker collected within a Louisiana tidal pass over a 2-year period, from October 2006 through March 2007 and from September 2007 through March 2008. Standard length (SL) at age in days after hatching (dah), over both years, was fitted with a LairdGompertz growth model, and similar models were fitted separately to year and season to determine whether different spawning subgroups existed. In both years, the maximum growth rate occurred 20 days earlier in spring than in fall. Otolith microstructure measurements were used to determine the age (~40 dph) at which larvae encountered differing water mass characteristics of the coastal boundary zone (the offshore to inshore recruitment corridor). Growth rates increased after fish encountered lower-salinity (<20) waters of the coastal boundary zone and estuary of Bayou Tartellan, LA. Temporal variability in spawning of Atlantic croaker, determined with age–length keys, revealed that the highest frequency of hatch dates occurred during November in 2006 and 2007. The Atlantic croaker (Micropogonias undulatus) in the western Atlantic range from the Gulf of Maine to the northern Gulf of Mexico (GOM). That range potentially may extend into the southern GOM, the Lesser Antilles, and southern Caribbean and from Brazil through southern Argentina (Smith, 1997). The status of the Atlantic croaker stock is unknown (NMFS, 2009), although it is expected to be below maximum sustainable yield. The amount of Atlantic croaker harvested commercially has been cyclic, ranging from 1100 metric tons (t) per year to more than 15,000 t per year; annual levels recently were estimated at approximately 9000 t, with a value of approximately $8 million (NMFS, 2012). These fluctuations reflect the high variability in recruitment patterns driven by both small and large spatial and temporal scales of environmental conditions, such as wind field patterns, storm frequency, salinity, temperature, hypoxic zones, and local hydrographic features (Norcross, 1983; Norcross and Austin, 1988; Able, 2005; Eby et al., 2005; Montane and Austin, 2005). The commercial stock is further affected by the amount of Atlantic croaker that is caught as bycatch, principally through shrimp trawling—an amount that is calculated to be 60–80% of the catch by weight (NMFS, 2012). The amount of Atlantic croaker caught annually as bycatch can total from 100,000 to 400,000 t, and data from the 1990s indicated that Atlantic croaker may have made up almost 73% of the total bycatch of short-lived demersal species (NMFS, 2009, 2012). The results of analysis of samples collected during 1986–2006 by Southeast Area Monitoring and Assessment Program crews show that the Atlantic croaker, which was classified as a bycatch species, to be the dominant species by weight at depths less than 30 m off the Louisiana coast (Helies and Jamison1). At depths

fishery bulletin

Age, growth, and recruitment of larval and early juvenile Atlantic croaker (Micropogonias undulatus), determined from analysis of otolith microstructure