38 MARCH 2022 • WORLD AQUACULTURE • WWW.WA S .ORG FIGURE 12. Histological description of normal or lordosis deformed largemouth bass larvae (21 DPH). Larvae without any deformities showing normal ontogenetic pattern of the haemal vertebrae (a, b). Larvae with lordosis and curved musculature (c, d, e), which was sometimes accompanied with an enlarged notochord and vertebrate (c, e). The start of curved musculature varied from right below the swim bladder and stomach to midway down the trunk region. ah = arche haemal; an = arche neural; da = dorsal aorta; hk = head kidney; n = notochord; sb = swim bladder; sc = spinal cord; sem = skeletal epaxial muscle; sto = stomach; sc = scales; ver = vertebra. 50x magnification; H&E staining. Photos by Nicholas Romano. FIGURE 13. Histological description of normal (a, b) or lordosis-deformed largemouth bass larvae (c, d) (21 DPH). Larvae without any deformities showing normal swim bladder inflation that had a long oval shape (a, b), whereas the deformed larvae appeared to have abnormally inflated swim bladders characterized by being more circular/smaller that sometimes appeared to push on the vertebrate of the larvae (d). hk = head kidney; int = intestine; lip = lipid; n = notochord; sb = swim bladder; sc = spinal cord; sto = stomach. 50x magnification; H&E staining. Photos by Nicholas Romano.
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