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Hematology and plasma chemistry of wild shortnose sturgeon A cipenser brevirostrum from D elaware R iver, USA
Author(s) -
Matsche M. A.,
Rosemary K. M.,
Brundage H. M.,
O'Herron J. C.
Publication year - 2013
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.12050
Subject(s) - biology , zoology , acipenser , sturgeon , sodium , scorpaenidae , osmoregulation , hematology , fish <actinopterygii> , medicine , fishery , veterinary medicine , salinity , ecology , chemistry , immunology , organic chemistry
Summary The effects of gender, maturity, intersex condition and annual and seasonal variability were studied on hematology and plasma chemistry of wild shortnose sturgeon A cipenser brevirostrum from the D elaware R iver. A total of 68 fish were captured by gill net and examined in M ay‐ J une, and 61 additional fish were captured and examined in N ovember during 2006–2011. Total leukocyte counts ( WBC ), leukogram, PCV and the plasmatic concentrations of 13 biochemical analytes were measured from these fish using standard clinical methods. Season and gender had no effect on hematologic indices, but PCV was inversely related to maturity of fish (robust intervals: 27–40% in immature fish, 21–36% in mature fish). Significant annual variation was detected in eosinophil (annual range in robust interval: 0–1176 lower limit, 670–7882 upper limit) and monocyte (0–210 lower limit, 560–1980 upper limit) counts (cells  μ l −1 ). The lower limit of the robust interval varied annually by as much as 6% for sodium and 12% for chloride, while the upper limit of the robust interval varied annually by as much as 8% for sodium and 15% for chloride. Seasonal differences in mean sodium and chloride (6–7% higher in autumn) and proteins (5–13% higher in autumn) may reflect environmentally induced changes in osmoregulation, while aspartate aminotransferase was 38–55% higher in the spring. In females, calcium and total protein were highest in mature fish (robust intervals: 10.5–22.1 mg dl −1 C a 2+ , 4.1–6.9 g dl −1 TP ) compared to immature (7.3–16.9 mg dl −1 C a 2+ , 2.8–5.2 g dl −1 TP ) and developing fish (7.8–18.9 mg dl −1 C a 2+ , 3.2–5.6 g dl −1 TP ), indicating changes associated with vitellogenesis. Glucose was significantly higher in females (robust interval: 23–167 mg dl −1 ) than males (35–138 mg dl −1 ), possibly indicating gender‐based differences in energetic requirements. Intersex condition was associated with lowered glucose, potassium and creatinine phosphokinase. Reference intervals reported here are useful for evaluating the health and physiological condition of shortnose sturgeon.

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