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Fig. 7 in Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 7. Percentages of immature (white) and mature-resting females (black) per size classes (total length, mm) for Mycteroperca marginata individuals collected in the study area. n = 111.

Fig. 6 in Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 6. Percentage of mature resting females for specimens of the dusky grouper (Mycteroperca marginata) collected in the study area by total length classes, fitted to a logistic function. L50 = 451.3 mm. n = 111.

Fig. 4 in Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 4. von Bertalanffy growth curve fitted to age-at-length data for dusky grouper specimens (Mycteroperca marginata) collected in the study area (K = 0.069 e L = 1249 mm). n = 108.

Fig. 2 in Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 2. Transverse section of an otolith of a 4+ year-old dusky grouper (Mycteroperca marginata) collected in the study area. The photograph was taken under a stereomicroscope (20x) and reflected light, and shows a clear differentiation between opaque (white) and translucent (dark) growth bands.

Fig. 1. A in Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 1. A) Patos Lagoon (10.360 km2) in southern Brazil and B) the 4.5 km long pair of rocky jetties that connect the estuarine zone of Patos Lagoon to the Atlantic Ocean. C) A detail of the west jetty and its large pieces of rock (nearly 10 ton each), located in the municipality of Rio Grande (Rio Grande do Sul state) in southern Brazil.

Fig. 5 in Age, growth, and reproductive aspects of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 5. Ovary sections of the dusky grouper (Mycteroperca marginata) collected in the study area. A) Immature gonad showing several primary germ cells (PGC) and oogonia. B) Resting gonad with small previtellogenic oocytes in chromatin nucleolus stage (CN) and in perinucleolar stage (PN).

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Fig, 14 - Mycteroperca fusca, 327 mm. SL, Grand Canary Island, syntype of Serranus simanyi STEINDACHNER, 1891; NMW 39457-1. Drawn by E. HEEMSTRA. in A Taxonomic Revision Of The Eastern Atlantic Groupers (Pisces : Serranidae)

Fig, 14 - Mycteroperca fusca, 327 mm. SL, Grand Canary Island, syntype of Serranus simanyi STEINDACHNER, 1891; NMW 39457-1. Drawn by E. HEEMSTRA.

Fig. 4 in Diet and feeding strategy of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 4. Feeding strategy diagram for individuals of three size classes (A: <400 mm TL; B: 400-500 mm TL; C:>500 mm TL) of the dusky grouper Mycteroperca marginata. Prey-specific abundance plotted against frequency of occurrence of food items in the diet of the dusky grouper. The inserted boxed (A) represents a conceptual diagram of a resource niche width characterized by a high between-phenotype component (sensu Amundsen et al., 1996) to niche width contribution. The number of individuals analyzed in each size class is 29, 34 and 15, respectively.

Fig. 3 in Diet and feeding strategy of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 3. Average values (±SD) of prey's size (mm, TL) and biomass (g) in the stomach content of three size classes (<400 mm TL; 400-500 mm TL;>500 mm TL) of the dusky grouper Mycteroperca marginata. The number of individuals analyzed in each size class is 29, 34 and 15, respectively.

Fig. 1 in Diet and feeding strategy of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 1. Patos Lagoon (10.360 km2) in southern Brazil (A) and the 4.5 km long pair of jetties that connects the estuarine zone of the lagoon with the Atlantic Ocean (B), detail of the west jetty and their large pieces of rock nearly 10 ton each (C). These rocky jetties are located in the Rio Grande City (Rio Grande do Sul State) in southern Brazil.

Fig. 2 in Diet and feeding strategy of the dusky grouper Mycteroperca marginata (Actinopterygii: Epinephelidae) in a man-made rocky habitat in southern Brazil

Fig. 2. Components (%N, %W, %F) of the Index of Relative Importance (%IRI) for each of the five major categories of food found in the stomach content of three size classes (A: <400 mm TL; B: 400-500 mm TL; C:>500 mm TL) of the dusky grouper Mycteroperca marginata. The number of individuals analyzed in each size class is 29, 34 and 15, respectively. Mollusks did not occur in the larger size class (> 500 mm TL).

Fig. 16 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 16. Variation of the gonadosomatic index (GSI) for females of Mycteroperca bonaci. Bar indicates standard deviation values.

Fig. 10 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 10. Transverse section of the gonad of Mycteroperca bonaci showing oocytes with eroded nucleus and cytoplasm fragmented in transitional individual. Fragmented oocytes (FO). Stain: Gommory.

Fig. 5 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 5. Transverse section of an early maturation ovary of Mycteroperca bonaci. Gonadal wall (GW), ovarian lamellae (OL), and oocytes in the late perinucleolus stage (*). Stain: H.E.

Fig. 8 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 8. Transverse section of a resting ovary of Mycteroperca bonaci. Gonadal wall (GW). Stain: H. E.

Fig. 2 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 2. Size distribution of absolute frequency (columns) and relative cumulated frequency (line) for total sampled of black grouper Mycteroperca bonaci.

Fig. 1 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 1. Sampling area (adapted from the Nautical Charts no. 50 and 60 of Diretoria de Hidrografia e Navegação – Brazilian Navy). Upper right: details of the North area, 1 – Sirius Bank, 2 – Guará Bank, 3 – Aracati Bank. Bottom right: details of the South area.

Fig. 9 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 9. Development of spermatid crypts (SC) in the estroma of Mycteroperca bonaci in transition period. Presence of countless oocytes with their nucleus erode and the fragmented cytoplasm (*). Stain: H. E.

Fig. 4 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 4. Size distribution of absolute frequency (columns) and relative cumulated frequency (line) for black grouper Mycteroperca bonaci caught in South area.

Fig. 19 in Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil

Fig. 19. Monthly catch of the Mycteroperca bonaci for the states of Rio Grande do Norte (North area) and Pernambuco (South Area) from Northeast Fisheries Statistics Bulletin (IBAMA). RN: Rio Grande do Norte/year, PE: Pernambuco/year.