• Journal of Marine Life Science
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• v.9 no.1
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• pp.22-32
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• 2024

The purpose of this study was to determine the effect of external biologger attachment methods on the blood parameters and attachment efficiency of spotted sea bass Lateolabrax maculatus (mean body weight 2630.8 g). The fish were tagged using four different external attachment methods with dummy biologgers: no attachment (control), anchor attachment (AA), monofilament attachment (MA), and silicon tube attachment (SA), each with triplicates. Blood indices and biologger attachment efficiency were assessed on days 1, 7, 14, 28, 56, and 84 after attachment. The concentrations of hematocrit, Na⁺, Cl^-, glutamic pyruvic transaminase and total protein, and the activity of superoxide dismutase in blood were not affected by the external attachment method of biologger. The concentrations of glutamic oxaloacetic transaminase (day 1 of attachment), hemoglobin (day 56) and total cholesterol (day 56 and 84) in AA group, the concentrations of glucose and cortisol (day 14) and total cholesterol (day 84) in MA group showed significantly higher than those of control (p<0.05). During the experiment period, the SA group had no differences from the control in all blood properties. The biologger attachment efficiencies of the AA, MA, and SA groups after 84 days were 0.0%, 33.3%, and 100.0%, respectively. These results indicate that the optimum external biologger attachment method under our experimental conditions is SA type.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.54 no.1
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• pp.38-45
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• 2021

This study aimed to determine the effect of the pop-up satellite archival tag (PSAT) tagging method on the blood indices and PSAT attachment efficiency of yellowtail Seriola quinqueradiata (mean body weight 10.2 kg). Based on tagging method, the fishes were divided in four different groups: untagged (control), single anchor (SA), dual anchor (DA), and silicon tube (ST). The blood indices and PSAT attachment efficiency were investigated on days 1, 14, and 28 after tagging PSAT on the muscle below the dorsal fin for each tagging method in triplicates. After 28 days of tagging with PSAT, a significant increase was observed in plasma glucose level in the ST group and in total protein level in the DA and ST groups. The levels of glucose, total protein, and total cholesterol in the SA group after 28 days of tagging were significantly lower than in the control group. The efficiencies of PSAT attachment were 0% in the SA and DA groups on 14 days post-tagging, and 66.7% in the ST group on 28 days post-tagging. The study results indicate that the proper PSAT tagging method is the ST type. The information obtained in this study presents valuable data that provide the required PSAT operational tool for industrial development and ecological monitoring of yellowtail.