Publicaties | Kaarten

nieuwe zoekopdracht

[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina
Growth, mortality, reproduction and feeding of knobbed porgy, Calamus nodosus, along the southeastern United States coast
Horvath, M.L.; Grimes, C.B.; Huntsman, G.R. (1990). Growth, mortality, reproduction and feeding of knobbed porgy, Calamus nodosus, along the southeastern United States coast. Bull. Mar. Sci. 46(3): 677-687
In: Bulletin of Marine Science. University of Miami Press: Coral Gables. ISSN 0007-4977; e-ISSN 1553-6955
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Aquatic organisms > Food organisms
    Diets
    Feeding
    Fishery sciences > Biology > Fishery biology
    Population characteristics > Population structure > Age composition
    Population characteristics > Population structure > Sex ratio
    Population functions > Growth
    Population functions > Mortality
    Population functions > Recruitment
    Recreation > Fishing > Sport fishing
    Reproduction > Sexual reproduction
    Sex reversal
    Calamus nodosus Randall & Caldwell, 1966 [WoRMS]; Sparidae Rafinesque, 1818 [WoRMS]
    Marien/Kust
Auteurs  Top 
  • Horvath, M.L.
  • Grimes, C.B.
  • Huntsman, G.R.
Abstract
    The authors studied age, growth, mortality, age/size composition, reproduction and feeding of knobbed porgy caught off North Carolina and South Carolina from 1972 to 1978. Maximum age determined from scales was 17 yr for a 460 mm TL specimen. Annual increments in back-calculated length were 194 mm the first year, 57 mm the second year, and 42, 34 and 25 mm for years 3-5. Annual growth for ages 6-10 and 11-16 yr averaged 13 and 12 mm. The von Bertalanffy growth model fitted to these data is given. Sex ratio at size and age data indicated that knobbed porgy are protogynous hermaphrodites, changing sex when they are 300-500 mm TL. Females were significantly predominant in the sample population (59%). Monthly mean gonosomatic indices suggest that fish spawn in May and June. Limited diet data showed that knobbed porgy are benthic carnivores preying primarily on mollusks, crabs, polychaetes and sea urchins, which they crush with their strong jaw and pharyngeal teeth.
Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ.