Mummichog

The South Carolina Department of Natural Resources published guides to many threatened animals living in the state. This guide gives information about the Mummichog, including description, status, habitat, conservation challenges & recommendations, and measures of success

Sailfin Molly

The South Carolina Department of Natural Resources published guides to many threatened animals living in the state. This guide gives information about the Sailfin Molly, including description, status, habitat, conservation challenges & recommendations, and measures of success

Age and Growth of King Mackerel, \u3cem\u3eScomberomorus cavalla\u3c/em\u3e, from the Atlantic Coast of the United States

Whole sagittae from 683 and sectioned sagittae from 773 adult (age\u3e 0 ; 437-1.310 mm FL), and lapilli from 29 larval (2-7 mm SL) and 69 young-of-the-year (79-320 mm FL) king mackerel, were examined. All fish were from waters off the Atlantic coast of the southeastern United States (Cape Canaveral, Florida to Cape Fear. North Carolina). Back-calculated lengths at ages and von Bertalanffy growth equations were calculated from both whole and sectioned sagittae. Ages determined from sectioned sagittae were significantly greater than ages determined from whole sagittae, and the magnitude of the difference increased with age (from sections). Rings on sectioned sagittae are considered to be true annual increments, forming during June-September. There was no clear pattern to ring formation on whole otoliths. The oldest fish examined was age 21. The daily nature of rings on lapilli of age 0 king mackerel was not validated, but if the marks are formed daily they suggest growth rates of approximately 0.47 mm/d for early larvae and 2.9 mm/d for fish 1-3 months of age

Contributions to the life history of Black Sea Bass, Centropristis striata, off the southeastern United States

Ages of black sea bass. Cenropristis striata, from the South Atlantic Bight were determined from otoliths. Analysis of marginal increments showed that annulus formation occurred in April and May. The von Bertalanffy growth equation derived from back-calculated mean standard lengths at age was It = 341 (1 - e-O.23f.l9(I+O.3010. where t is age in years and It = standard length at age. The oldest fish was age 10. Centropristi8 striata is a protogynous hermaphrodite that undergoes sex succession at ages 1 through 8. The process of sex succession is described from histological examination of the gonads. The major spawning period is from March to May, and a minor spawn occurs in September-October. Mature males and females were encountered at age 1. Fecundity estimates ranged from 17,000 in a 108 mm SL female to 1,050.000 in a 438 mm SL fish, and were significantly related to length, weight, and age. The instantaneous rate of total mortality of C. striata from catch curve analysis, ranged from 0.721 in 1978 to 1.320 in 1981 for commercial fish traps and 0.726 in 1979 to 1.430 in 1981 for hook-and-Iine gear. Petersen mark-recapture techniques were used to determine the population size of C. striata. on two shallow-water patch reefs. Conversions of these estimates to densities gave 14-125 individuals per hectare

South Carolina marine recreational fishery survey, 1990

One of the principal responsibilities of the Marine Resources Division is management of recreational fisheries. Effective management requires an extensive data base on both the resources and their usage. MRD's Fisheries Statistics Program is primarily responsible for the collection, compilation, analysis, and distribution of fishery-dependent information for the marine recreational fisheries. This report describes procedures and results of these surveys for 1990

Biology of the Whitebone Porgy, Calamus Leucosteus, in the South Atlantic bight

Whitebone porgy, Calamus leucosteus, were taken in trawl surveys over reef and non reef habitats in the South Atlantic Bight in depths of 11 to 88 m. Larger individuals were taken in greater depths. Twelve age groups can be identified with sectioned otoliths and nine using scales. Annulus formation for otoliths and scales occurs between June and July. Von Bertalanffy growth equations of Lt = 331 [1 - e-O.173' ,..,.6390IJ from otoliths and Lt = 362 [ 1- e-O.261111.0.3973] from scales suggest that attainment of maximum size for this species is similar to reports for other reef species. The fork length-weight relationship for C. leucosteus can be described by W= 0~00004 FL'·90? The whitebone porgy is a protogynous hermaphrodite; younger, smaller fish are predominately females, and older, large fish are mostly males. Sexual transition most commonly occurs between ages II-IV and fork lengths 18-25 em. Peak spawning occurs in May with total fecundity ranging from 30,400 to 1,587,400 eggs. The fecundity-weight relationship can be described by F = 10.29438 WI.6562. Regional landings data are not available for C. leucosteus; however, it was the third and fourth most abundant species by weight from trawler landings in South Carolina during 1979 and 1980

Contribution to the life history and reproductive biology of gag, mycteroperca microlepis (serrandidae), in the South Atlantic bight

The gag, Myceteroperca microlepis, is a demersal serranid found along the southeastern coast of the States and in the Gulf of Mexico. Throughout its range the gag is of both commercial and recreational importance. Because of its relatively slow growth rate and desirability, overfishing is of wide concern. The gag is a protogynous hermaphrodite, and suggested that sexual transformation occurs during the 10th or 11th year. Spawning occurs from January to March off the west coast of Florida , and the maximum reported age is 13 years in both the Gulf of Mexico and the South Atlantic Bight 1978 J. Microscopic examination of the gonads is necessary for definite sexual identification, but gonad morphology has not been specifically described. The purpose of this study is to provide new information on the age, growth. and reproductive biology of this important species, including a description of the morphology of gag ovaries and testes

Age and growth of king mackerel, Scomberomorus Cavalla, from the Atlantic coast of the United States.

Whole sagittae from 683 and sectioned sagittae from 773 "adult" (age> 0 ; 437-1.310 mm FL) and lapiUi from 29 larval (2-7 nun SL) and 69 young-of-the-year (79-320 mm FL) king mackerel. were examined. All fish were from waters off the Atlantic coast of the southeastern United States (Cape Canaveral, Florida to Cape Fear. North Carolina). Back-calculated lengths at ages and von Bertalanffy growth equations were calculated from both whole and sectioned sagittae. Ages determined from sectioned sagittae were significantly greater than ages determined from whole sagittae, and the magnitude of the difference increased with age (from sections). Rings on sectioned sagittae are considered to be true annual increments. fonning during June-September. There was no clear pattern to ring formation on whole otoliths. The oldest fish examined was age 21. The daily nature of rings on lapilli of age 0 king mackerel was not validated. but if the marks are formed daily they suggest growth rates of approximately 0.47 mm/d for early larvae and 2.9 mmld for fish 1-3 months of age

South Carolina marine recreational fishery survey, 1993

One of the principal responsibilities of the Marine Resources Division is management of recreational fisheries. Effective management requires an extensive data base on both the resources and their usage. MRD's Fisheries Statistics Program is primarily responsible for the collection, compilation, analysis, and distribution of fishery-dependent information for the marine recreational fisheries. This report describes procedures and results of these surveys for 1993