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Fig. 4 in Reproductive biology of pacu Piaractus mesopotamicus (Holmberg, 1887) (Teleostei: Characidae) in the Cuiabá River Basin, Mato Grosso, Brazil

Fig. 4. Monthly variation of the gonadosomatic index (GSI) of P. mesopotamicus females and males in the headwaters (a,b) and the flood area (c,d), respectively, between August 2006 and July 2007.

Fig. 6 in Reproductive biology of pacu Piaractus mesopotamicus (Holmberg, 1887) (Teleostei: Characidae) in the Cuiabá River Basin, Mato Grosso, Brazil

Fig. 6. Variation in the stomachsomatic index (IS) of P. mesopotamicus females and males (a, b) and hepatosomatic index (IH) of females and males(c, d), respectively, according to the stages of gonadal maturation between August 2006 and July 2007.

Fig. 1 in Reproductive biology of pacu Piaractus mesopotamicus (Holmberg, 1887) (Teleostei: Characidae) in the Cuiabá River Basin, Mato Grosso, Brazil

Fig. 1. Geographic location of the sites sampled in the Cuiabá River basin, Mato Grosso State, Brazil.

Fig. 3 in Reproductive biology of pacu Piaractus mesopotamicus (Holmberg, 1887) (Teleostei: Characidae) in the Cuiabá River Basin, Mato Grosso, Brazil

Fig. 3. Relative frequency of P. mesopotamicus females in the headwaters - Rosário Oeste, MT (a) and in the flood area - Poconé, MT (b) according to the stages of gonadal maturation (MG; MA; SP and RE) between August 2006 and July 2007.

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Figure 6 in Reproductive biology of Elops lacerta (Elopiformes: Elopidae) in the Gulf of Guinea, Côte d'Ivoire, West Africa

Figure 6. – Size at first sexual maturity (FL50) of males and females Elops lacerta caught from January 2019 to December 2020.

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FIGURE 1 in Reproductive biology of Parona signata (Actinopterygii: Carangidae), a valuable economic resource, in the coastal area of Mar del Plata, Buenos Aires, Argentina

FIGURE 1 | Monthly variation of the gonadosomatic index (GSI) of females (black continuous line), standard deviation (dashed lines) and temperature (in Celsius degrees) (gray continuous line) based on an annual cycle.

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FIGURE 3 in Reproductive biology of Parona signata (Actinopterygii: Carangidae), a valuable economic resource, in the coastal area of Mar del Plata, Buenos Aires, Argentina

FIGURE 3 | Photomicrographs of Parona signata. A: primary growth oocytes (P); B: cortical alveoli oocytes (CA); C: yolked oocytes (YO) and a post-ovulatory follicle (large arrow); D: details of a yolked oocyte (r: radiate zone; g: granulosa cells; t: theca cells); E: hydrated oocyte (arrow); F: details of a post-ovulatory follicle (arrow); G: primary growth oocytes in an adult ovary (notice the thick wall of the ovary – OW); H: atresic follicle (arrow).

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FIGURE 2 in Reproductive biology of Parona signata (Actinopterygii: Carangidae), a valuable economic resource, in the coastal area of Mar del Plata, Buenos Aires, Argentina

FIGURE 2 | Monthly relative frequency of the different gonadal development stages observed in females of Parona signata on the annual cycle.

Fig. 11 in Reproductive biology of Cetengraulis edentulus (Cuvier, 1829), the major fishery resource in Guanabara Bay, Brazil

Fig. 11. Relation between the oocytes mean diameter with the gonadosomatic index (A) and with the condition factor (B) of Cetengraulis edentulus in Guanabara Bay. Lines represent the generalized additive models selected by the Akaike information criterion.

Fig. 10 in Reproductive biology of Cetengraulis edentulus (Cuvier, 1829), the major fishery resource in Guanabara Bay, Brazil

Fig. 10. Relation between fecundity with total length (A) and fullness index (B) and between fecundity residuals (after controlling for the length effect) with gonadosomatic index (C) for Cetengraulis edentulus in Guanabara Bay. Lines represent the generalized additive models selected by the Akaike information criterion.

Fig. 7 in Reproductive biology of Cetengraulis edentulus (Cuvier, 1829), the major fishery resource in Guanabara Bay, Brazil

Fig. 7. Mean values (± standard error) of the condition factor among months and seasons (black square = females; white circle = males) of Cetengraulis edentulus in Guanabara Bay.

Fig. 4 in Reproductive biology of Cetengraulis edentulus (Cuvier, 1829), the major fishery resource in Guanabara Bay, Brazil

Fig. 4. Mean values (± standard error) of gonadosomatic index (GSI) among months and seasons (black square = females; white circle = males) of Cetengraulis edentulus in Guanabara Bay.

Fig. 6 in Reproductive biology of Cetengraulis edentulus (Cuvier, 1829), the major fishery resource in Guanabara Bay, Brazil

Fig. 6. Variation of the index of reproductive activity (IRA) for female Cetengraulis edentulus among months and seasons in Guanabara Bay.

Fig. 3 in Reproductive biology of Cetengraulis edentulus (Cuvier, 1829), the major fishery resource in Guanabara Bay, Brazil

Fig. 3. Seasonal variation in percent (%) frequency of occurrence of gonad maturation stages (GMS) for females (white column) and males (black column) of Cetengraulis edentulus in Guanabara Bay.

Fig. 7 in Morphology of the female reproductive system and physiological age-grading of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of water hyacinth

Fig. 7. Number of eggs ovulated by adult females of Megamelus scutellaris correlated by a) age (days) and b) collar length (mm). The solid line represents the linear relationship between variables and the dashed lines is the 95% confidence interval (n = 15; P = 0.001 and r = 0.778).

Fig. 6. The 3 in Morphology of the female reproductive system and physiological age-grading of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of water hyacinth

Fig. 6. The 3 parous classes of Megamelus scutellaris. The P1 class (a and b) is characterized by the presence of follicular relics, which may not be present in some or all ovarioles, may be light in coloration and may or may not encircle the base of the ovariole. The follicular relics do not occur at high enough densities to cause an expansion or bulging. The collar may or may not be visible and does not extend past the follicular relic accumulation area. In the P2 class (c and d) follicular relics are present in all ovarioles and at high enough densities to cause bulging. They are distinctly yellow in coloration and relatively darker in comparison to those found in the P1 class. The collar is easily seen and typically extends past the follicular accumulation area. In the P3 class (e and f) follicular relics are variable, may or may not be in high enough densities to cause bulging, and typically completely encircle the base. The collar length easily surpasses the follicular relic accumulation area.

Fig. 4 in Morphology of the female reproductive system and physiological age-grading of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of water hyacinth

Fig. 4. Follicular relic formation and appearance in the distal area of an ovariole and anterior lateral oviduct (loa) with the germinal vesicle (gv), oocyte with yolk (oy), follicular epithelium (fe) beginning to slough off into the ovariole base (as shown by the arrow), follicular relics (fr), and collar in Megamelus scutellaris. Note the granular appearance of follicular relics having a high enough density to begin to expand or bulge the sides of the lateral oviduct.

Fig. 2 in Morphology of the female reproductive system and physiological age-grading of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of water hyacinth

Fig. 2. Photomicrographs of the female reproductive system of Megamelus scutellaris showing a) distal portion of the ovary showing the distal lateral oviduct (lop), common oviduct (co), bursa copulatrix (b), and spermatheca/spermathecal gland (spt and sptg, respectively), and b) close-up of ovariole morphology (b) showing the anterior lateral oviduct (loa), germarium (g), vitellarium (v), and terminal filament (tf).

Fig. 1 in Morphology of the female reproductive system and physiological age-grading of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of water hyacinth

Fig. 1. Photomicrograph of the female reproductive system of Megamelus scutellaris showing ovaries (ov), common oviduct (c), anterior and posterior portions of the lateral oviduct (loa and lop, respectively), and overall structure of a follicle including the germinal vesicle (gv) and oocyte with yolk (oy).

Fig. 3 in Morphology of the female reproductive system and physiological age-grading of Megamelus scutellaris (Hemiptera: Delphacidae), a biological control agent of water hyacinth

Fig. 3. Photomicrographs of the female reproductive system of Megamelus scutellaris showing a) close-up of the distal portion of an ovariole showing the anterior lateral oviduct (loa), follicular epithelium (fe), ovariole sheath (os), germinal vesicle (gv), oocyte with yolk (oy), and collar (c), and b) distal portion of an ovariole showing a newly ovulated egg (e) into the anterior lateral oviduct (loa), ovary (ov), ovariole (lov), and the collar (c).