Accession Number : ADA173781


Title :   Species Profiles: Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (South Florida): Gray, Lane, Mutton and Yellowtail Snappers.


Descriptive Note : Biological rept.,


Corporate Author : UNIVERSITY OF WEST FLORIDA PENSACOLA DEPT OF BIOLOGY


Personal Author(s) : Bortone,Stephen A ; Williams,James L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a173781.pdf


Report Date : Jun 1986


Pagination or Media Count : 26


Abstract : These four snapper species have similar morphologies as well as life history and environmental requirements. With some exceptions they are restricted to tropical and subtropical coastal areas of the western Atlantic. Adults often associate with coral reef and other hard-bottom communities. Juveniles and pre-adults usually inhabit shallow, inshore areas and are often found in seagrass beds. Reproduction usually takes place offshore in the warmer months of the year. Fecundity is positively related to female body size, but there is substantial variation both within and among the species. Juveniles obtain adult body proportions at about 50 mm SL. Approximately total maximum lengths of adults are 900 mm for gray snapper, Otoliths are the most preferred body part used to determine age. Most snappers attain sexual maturity after 3-5 years at a size range of 180-350 mm FL. Males mature at a smaller size than females. Recent catches of gray and lane snappers have been increasing, whereas mutton and yellowtail snappers show no clear trends. Sport fishing probably has a substantial impact on the stocks of all four species. All four snappers feed predominantly on small benthic fishes and crustaceans, but yellowtail snapper feed on more pelagic animals. Upper water temperature tolerance limits are 27.2-32.5 C and lower limits are 11-14 C.


Descriptors :   *FISHES , TEMPERATURE , COASTAL REGIONS , GROWTH(GENERAL) , MARINE BIOLOGY , LIFE CYCLES , ATLANTIC OCEAN , SALINITY , FLORIDA , CORAL REEFS , INHABITANTS , MORPHOLOGY(BIOLOGY)


Subject Categories : Biology


Distribution Statement : APPROVED FOR PUBLIC RELEASE