| Autor: |
Evans, JoyceJ., Klesius, PhillipH., Shelby, RichardA., Xu, De-Hai |
| Zdroj: |
Transactions of the American Fisheries Society; November 2008, Vol. 137 Issue: 6 p1667-1673, 7p |
| Abstrakt: |
AbstractIn the summer and fall of 2000, a high prevalence of ulcerative skin lesions in Atlantic menhaden Brevoortia tyrannusfrom inland bays of Delaware and Maryland caused public and governmental concern. The relationship between the frequency of skin ulceration and total plasma immunoglobulin (Ig) levels was investigated for Atlantic menhaden from these inland bays in 2000 and 2001. Total plasma Ig levels were determined using goat anti-menhaden Ig in an enzyme-linked immunosorbent assay. Total plasma Ig levels were higher in nonulcerated fish (7.4 ± 0.02 mg/mL [mean ± SE]; n= 543) than in skin-ulcerated ones (4.2 ± 0.42; n= 120). Skin ulcers were less frequent among small fish (67-80 mm fork length; 6%) than in medium (81-105 mm; 21%) or large fish (106-190 mm; 27%). Nonulcerated large fish had higher total plasma Ig levels (8.5 ± 0.44 mg/mL) than nonulcerated small fish (6.1 ± 0.28) but not medium fish (7.9 ± 0.42). The total plasma Ig levels were higher in all sizes of fish in 2001 (8.9 ± 0.26) than in 2000 (3.6 ± 0.18). Conversely, the frequency of ulceration in fish sampled for Ig was lower in 2001 (8%) than in 2000 (33%). Although these findings suggest a possible association between lower mean total plasma Ig levels and higher frequency of skin ulceration, a cause-and-effect relationship was not established. |
| Databáze: |
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