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Fig. 8 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 8: (a) Most basal region of the accessory gland with the duct being covered with a muscle coat containing circular (cm) and longitudinal (lm) muscle fibres (bar: 1 mm). (b) Typical appearance of a single cell within the tissue of the accessory gland (bar: 10 µm). (c) Basal part of the gland's epithelium with a basal membrane (bm) demarcating the epithelium from the coelom (bar: 10 µm). Additional abbreviations: nl…nucleolus, tr…tracheole.

Fig. 9 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 9: Ultrastructure of the apical part of an accessory gland cell with its typical arrangement of the microvilli and the three-layer cuticula (bar: 5 µm). (b) More detailed view on the apical part (bar: 3 µm). (c) Basal part of an accessory gland cell with an extensive formation of extracellular spaces (bar: 5 µm). Additional abbreviation: cb: cell border.

Fig. 7 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 7: (a) Detailed cellular structure of the glandular region II of the ductus receptaculi (bar: 10 µm). (b) End apparatus of a glandular cell within region II of the ductus (bar: 3 µm). (c) Cellular ultra-structure of region III of the ductus (bar: 10 µm). Additional abbreviations: cfc…cuticula-forming cell, ecs…extracellular space, ed…efferent ductule, ep…epithelium, mc…muscle coat, mit…mitochondrium, n..nucleus, ves…vesicle.

Fig. 5 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 5: Detailed views of some essential structures within the reproductive system of female Teleogryllus. (a) Different cross sections of the ductus receptaculi exhibiting a typical one-layer epithelium being demarcated from the glandular lumen by a more or less thick cuticular intima (bar: 0.5 mm). (b) Cross sections through the middle region of the ductus receptaculi with its glandular charcteristics (bar: 0.5 mm). Abbreviations: see Fig. 4, additional abbreviation: m…muscle tissue.

Fig. 6 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 6: Detailed morphology and histology of selected reproductive structures. (a) Internal surface of the receptaculum seminis with its numerous spines (sp; bar: 10 µm). (b) Cuticular process in the receptaculum (bar: 10 µm). (c) Detailed view on the terminal papilla (tp) and the orifice of the median oviduct (mo; bar: 0.1 mm). (d) Ultrastructure of region I of the ductus receptaculi (bar: 5 µm). (e) Cross section through region II of the ductus (bar: 30 µm). Additional abbreviations: ci…cuticular intima, gc…glandular cell, lu…lumen, ml…muscle layer, mv…microvilli.

Fig. 4 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 4: (a) Median histological section through the terminal segments of the female abdomen with its essential reproductive structures (bar: 0.5 mm). (b) Cross section through the 7th abdominal segment providing a detailed insight into the arrangement of several ductal structures (bar: 0.5 mm). Abbreviations: ag…accessory gland, dr2…ductus receptaculi, region II, dr3…ductus receptaculi, region III, ft…fatty tissue, gt…gut, lo…lateral oviduct, mo…median oviduct, op…ovipositor, rs…receptaculum seminis, sgp…subgenital plate, tp…terminal papilla.

Fig. 2 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 2: (a) Median section through those abdominal segments containing the reproductive system. The accessory glands positioned more laterally are not visible in this view (bar: 2 mm). (b) Illustration exhibiting the organ arrangement of the reproductive system in orthopteran insects (bar: 2 mm).

Fig. 1 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 1: (a) Female of the black field cricket Teleogryllus commodus WALKER 1869, lateral view (bar: 1 cm). (b) Ventral view of the female with the typical segmental organization of the abdomen (bar: 1 cm). (c) Terminal segments of the abdomen with a window cut into segment 7 (bar: 5 mm).

Fig. 3 in Morphology and histology of the reproductive system in females of the black field cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): a drawing study

Fig. 3: (a) Morphological organization of the receptacular complex in female Telegryllus (bar: 0.5 mm). (b) Cross sections through the morphologically distinguishable regions of the ductus receptaculi (bar: 0.1 mm). (c) External shape of an accessory gland occurring in females of the black field cricket (bar: 2 mm). (d) Cross sections through the apical region III and the middle region II (bars: 0.5 mm).

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Fig. 1 in Dependence of the sperm number on the adult age of the male black field cricket Teleogryllus commodus W ALKER (Insecta: Orthoptera)

Fig. 1: Shape and morphology of the spermatophore (total length: ca. 5 mm) separated from males of the black field cricket Teleogryllus commodus.

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Fig. 2 in Dependence of the sperm number on the adult age of the male black field cricket Teleogryllus commodus W ALKER (Insecta: Orthoptera)

Fig. 2: Results of sperm quantification of male crickets belonging to different age categories: (a) Age-dependence of the percentage of filled/unfilled spermatophores (N = 80); (b) Age-dependence of the number of sperm per spermatophore (N = 80). The asterisk indicates a significant difference (p <0.05) between adjacent mean values.

Fig. 3 in Life Time Egg Production in Females of the Cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): Experimental Results and Theoretical Predictions

Fig. 3: Total fecundity of female Teleogryllus commodus WALKER for different environmental temperatures (20 °C, 23 °C, 25 °C, and 30 °C). Asterisks indicate significant differences between neighbouring points (p <0.01).

Fig. 5 in Life Time Egg Production in Females of the Cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): Experimental Results and Theoretical Predictions

Fig. 5: Preliminary results obtained from the computer program CRICKTHERM. Dependence of fecundity on (A) temperature, (B) photoperiod, (C) protein content in food, (D) population density (individuals per square metre).

Fig. 4 in Life Time Egg Production in Females of the Cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): Experimental Results and Theoretical Predictions

Fig. 4: Results concerning the investigation of ovary weights and their dependence on environmental temperature. A) Scheme showing the preparation procedure necessary for the dissection of the ovaries. B) Graph illustrating the dependence of ovary weight in grams on environmental temperature. Ovary weights from 5-day old females (pre-oviposition period) and 10-day old females (oviposition period) have been compared. Points and error bars denote mean values and standard deviations (asterisks mark significant differences between neighbouring points, p <0.01).

Fig. 2 in Life Time Egg Production in Females of the Cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): Experimental Results and Theoretical Predictions

Fig. 2: Dependence of daily cricket fecundity on environmental temperature. (A) 20 °C, (B) 23 °C, (C) 25 °C, (D) 30 °C. Black lines represent mean values, whereas dashed lines mark the standard deviations. The thick grey lines show the respective out put produced by CRICKTHERM and should give an impression about the validity of the used model.

Fig. 1 in Life Time Egg Production in Females of the Cricket Teleogryllus commodus WALKER 1869 (Insecta: Orthoptera): Experimental Results and Theoretical Predictions

Fig. 1: Window design and function of the computer program CRICKTHERM calculating the fecundity of female crickets as a function of various environmental parameters. (A) Entrance window, (B) Input window including animal information and input parameters, (C) Output window presenting the fecundity-time-relationship as a line plot as well as specific output parameter, (D) Alternative output window presenting fecundity data as mean values and standard deviations.