caa a22 4500 477116787 CHVBK 20180405111624.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF00005035 doi (NATIONALLICENCE)springer-10.1007/BF00005035 Reproductive styles of shallow-water groupers (Pisces: Serranidae) in the eastern Gulf of Mexico and the consequences of fishing spawning aggregations [Elektronische Daten] [Felicia Coleman, Christopher Koenig, L. Collins] Synopsis: Seasonal and spatial aspects of spawning for three commercially important grouper species in the northeastern Gulf of Mexico are detailed. These species — all of which are protogynous hermaphrodites - spawn in deep water (> 25 m for red grouper,> 40 m for gag and scamp), making it difficult to observe spawning behaviors without ROV or submersible support. They respond to intense fishing pressure in ways that are directly related to their respective reproductive styles. Species that aggregate appear to be more susceptible to such pressures than those that do not, as evidenced by marked skewing of sex ratios in favor of females. Gag, Mycteroperca microlepis, have suffered a drop in the proportion of males from 17% to 1% in the last 20 years; scamp, Mycteroperca phenax, have dropped from 36% to 18%; and red grouper, Epinephelus morio, which do not aggregate, have shown little change in the sex ratio over the past 25-30 years. Kluwer Academic Publishers, 1996 Sex ratio nationallicence Protogyny nationallicence Sex change nationallicence Spawning nationallicence Selective fishing pressure nationallicence Coleman Felicia FSU/NMFS Institute for Fishery Resource Ecology, Department of Biological Science, Florida State University, 32306-2043, Tallahassee, FL, U.S.A. aut Koenig Christopher FSU/NMFS Institute for Fishery Resource Ecology, Department of Biological Science, Florida State University, 32306-2043, Tallahassee, FL, U.S.A. aut Collins L. National Marine Fisheries Service, 3500 Delwood Beach Road, 32408-7499, Panama City, FL, U.S.A. aut Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl 47/2(1996-10-01), 129-141 0378-1909 47:2<129 1996 47 10641 https://doi.org/10.1007/BF00005035 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00005035 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Coleman Felicia FSU/NMFS Institute for Fishery Resource Ecology, Department of Biological Science, Florida State University, 32306-2043, Tallahassee, FL, U.S.A aut NATIONALLICENCE 700 1- Koenig Christopher FSU/NMFS Institute for Fishery Resource Ecology, Department of Biological Science, Florida State University, 32306-2043, Tallahassee, FL, U.S.A aut NATIONALLICENCE 700 1- Collins L. National Marine Fisheries Service, 3500 Delwood Beach Road, 32408-7499, Panama City, FL, U.S.A aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl/ 47/2(1996-10-01), 129-141 0378-1909 47:2<129 1996 47 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer