Seasonal Values of Selected Blood Parameters of Farm-Raised Channel Catfish (<i>Ictalurus Punctatus</i>) in the Mississippi Delta

Leard, A. Timothy; Wagner, Bruce A.; Camp, K. L.; Wise, David J.; Gao, Xio Dan

doi:10.1177/104063879801000406

Cited by 14 publications

(16 citation statements)

References 19 publications

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“…In a previous study of channel catfish in the Mississippi Delta (Leard et al 1998), hematocrit, calcium, and pH levels of healthy channel catfish sampled in May and June were comparable to the initial levels found in this study. The results of this study support the previous findings of Bosworth et al (2003), who demonstrated that susceptible families of hybrid catfish had significantly greater gill damage than did susceptible families of channel catfish and blue catfish.…”

Section: Discussionsupporting

confidence: 85%

The Effects of Proliferative Gill Disease on the Blood Physiology of Channel Catfish, Blue Catfish, and Channel Catfish × Blue Catfish Hybrid Fingerlings

et al. 2010

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This study was conducted to gain a better understanding of the effect of exposure to the myxozoan Henneguya ictaluri (the agent of proliferative gill disease [PGD]) on host physiology by measuring the variation in selected blood characteristics in three differently affected host taxa (channel catfish Ictalurus punctatus, blue catfish I. furcatus, and blue catfish 3 channel catfish hybrid fingerlings). Forty-five fish of each host taxon were exposed to PGD, and 10 fish of each host taxon were sampled at 24, 96, and 168 h. Fish were weighed, blood was collected and analyzed for a suite of physiological variables, and wet mount preparations of gill clips were examined grossly for the presence of cartilage breaks. The results of this study are consistent with the current knowledge regarding H. ictaluri infections in blue catfish, channel catfish, and blue catfish 3 channel catfish hybrids. Chondrocytic lysis was observed in channel catfish and hybrid catfish at 96 and 168 h but was not observed in blue catfish. There was an observed reduction in oxygen partial pressure (pO 2 ) and an increase in carbon dioxide partial pressure (pCO 2 ) at 96 h in the blood of channel catfish and hybrid catfish, but these changes were not exhibited by blue catfish. For all species, pH decreased as lactate concentrations increased. The lack of physiological changes and the absence of H. ictaluri sporozoites and DNA in gill tissue lead us to speculate that H. ictaluri is unable to establish infection in blue catfish. Current research investigating the mechanisms of infection and portals of parasite entry into blue catfish, channel catfish, and blue catfish 3 channel catfish hybrids is underway to better elucidate the defenses employed by blue catfish against H. ictaluri.

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Section: Discussionsupporting

confidence: 85%

The Effects of Proliferative Gill Disease on the Blood Physiology of Channel Catfish, Blue Catfish, and Channel Catfish × Blue Catfish Hybrid Fingerlings

et al. 2010

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“…Leard et al (1998) found such changes in farm-raised T IV. Cells of lymphoid lineage in organs of control group and groups sampled on day 7 and 14 after bleeding (mean ..).…”

Section: Discussionmentioning

confidence: 85%

Composition of main haematopoietic compartments in normal and bled channel catfish

Fijan

2002

Journal of Fish Biology

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Differential cell counts showed that the head and trunk kidney of control and bled channel catfish Ictalurus punctatus had myeloid characteristics. They contained lymphoid and granuloid cells, thrombocytes, erythroid and agranular cells in decreasing order of abundance (%). Among the blast and precursor cells, the most numerous erythroid ones were followed by granuloid, lymphoid and agranular ones. The main changes after blood withdrawal were the decrease of thrombocytes and the increase of precursor cells in both kidney parts. In the group examined 7 days after bleeding the head kidney had a higher percentage of erythroid cells and lymphocyte precursors than the trunk kidney while the latter had more granuloid cells and their precursors. Basophils were present (c. 1%) in both regions of the kidney of all groups. The spleen was predominantly a lymphatic organ. It contained c. 80% lymphoid cells, a higher incidence of granulated lymphocytes than in kidneys, 15% thrombocytes and 1·4% agranular cells. Blood withdrawal caused an increase of thrombocytes, a decrease of lymphoid cells and an increase of erythroid precursors in the spleen. The last probably stemmed from the circulation. While haematocrit values failed to indicate the anaemic state in the bled groups, the differential red blood cell count showed dramatic differences between the control and bled groups as well as between the two groups in different stages of recuperation from the blood loss.

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“…Catfish (Bentinck-Smith et al, 1987;Leard, Wagner, Camp, Wise, & Gao, 2011). Channel Catfish exhibit primary and secondary stress responses when subjected to a rapid increase in environmental temperature from 28 to 36°C.…”

Section: Implications Of Thermal Stress On Channel Catfish Ecology mentioning

confidence: 99%

Effects of acute thermal stress on acid–base regulation, haematology, ion‐osmoregulation and aerobic metabolism in Channel Catfish ( Ictalurus punctatus )

et al. 2019

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The Channel Catfish Ictalurus punctatus is an important ecological, recreational and aquaculture species. In both natural and pond culture systems, Channel Catfish are periodically exposed to acute increase in temperature, especially in the summer, which may induce a stress response. With the effects of global climate change, the impact of rising temperatures on aquatic systems is expected to be exacerbated in the future. Hence, there is the need to understand the physiological mechanisms controlling the thermal stress response in fish. Acid–base, haematological, osmotic and metabolic regulations were investigated following acute temperature increase from 28°C to either 32°C or 36°C at a rate of 2°C/hr to assess the physiological response of Channel Catfish to temperature increase. Blood was sampled 1 hr after treatment temperatures were reached. When temperature increased from 28 to 32°C, blood bicarbonate (HCO3-) decreased while cortisol, partial pressure of carbon dioxide (pCO2) and glucose increased. When temperature increased from 28 to 36°C, blood pH, HCO3-, chloride, total proteins and mean corpuscular haemoglobin concentration decreased while cortisol, pCO2, haematocrit, haemoglobin, glucose, lactate, mean corpuscular volume and mean corpuscular haemoglobin all increased. The changes observed are characteristic of acute stress responses in fish and suggest that acute temperature increases to both 32 and 36°C are physiologically stressful to Channel Catfish.

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Seasonal Values of Selected Blood Parameters of Farm-Raised Channel Catfish (Ictalurus Punctatus) in the Mississippi Delta

Cited by 14 publications

References 19 publications

The Effects of Proliferative Gill Disease on the Blood Physiology of Channel Catfish, Blue Catfish, and Channel Catfish × Blue Catfish Hybrid Fingerlings

The Effects of Proliferative Gill Disease on the Blood Physiology of Channel Catfish, Blue Catfish, and Channel Catfish × Blue Catfish Hybrid Fingerlings

Composition of main haematopoietic compartments in normal and bled channel catfish

Effects of acute thermal stress on acid–base regulation, haematology, ion‐osmoregulation and aerobic metabolism in Channel Catfish ( Ictalurus punctatus )

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