. Bulletin - Southern California Academy of Sciences. Science. SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 1. Sagittal otoliths of Gulf corvina. (top) Drawing of a whole otolith from an average age 5 yr individual, where the dashed line represents where a section was taken through the focus, (bottom) Transverse section of a sagittal otolith from a 749 mm, age 5 yr individual, where numbers demarcate annuli, core is marked, and there is an example of where interannular width measurements were taken. Reproductive Development and Sexual Maturity Standard histological techniques (Humason 1972) w
. Bulletin - Southern California Academy of Sciences. Science. SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. Fig. 1. Sagittal otoliths of Gulf corvina. (top) Drawing of a whole otolith from an average age 5 yr individual, where the dashed line represents where a section was taken through the focus, (bottom) Transverse section of a sagittal otolith from a 749 mm, age 5 yr individual, where numbers demarcate annuli, core is marked, and there is an example of where interannular width measurements were taken. Reproductive Development and Sexual Maturity Standard histological techniques (Humason 1972) were used to perform microscopic examinations of gonad tissues, which provided a means to distinguish sexually mature individuals from immature individuals that had never spawned before. Briefly, preserved samples of gonad tissues were taken from the central portion of one lobe, embedded in paraffin, sectioned transversely to 5-6 micron thickness, and stained with Haemotoxylin and Eosin Y. Classification of gonadal development stages followed Brown-Peterson et al. (2007). Sexually mature females were classified as containing oocytes in early to advanced (, hydrated) stages of vitellogenesis, whereas sexually mature males were identified by the presence of spermatozoa within spermatocysts, lobules, or fully developed sperm ducts. Diagnosis of sexual pattern followed criteria outlined for fishes. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles : Southern California Academy of Sciences
Size: 1550px × 1612px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
