Hematological response of Amazonian ornamental Peckoltia oligospila subjected to stress by transportation

ABSTRACT The objective of this work was to evaluate the hematological responses of bola-pleco (Peckoltia oligospila) undergoing the stress of transportation. Variations on blood parameters were analyzed at 0, 6, 24, 48, 72 and 96h after transportation. Responses to stress were detected from 0 to 6h after the transportation of fish, however, most parameters returned to baselines values within 24h of transportation. The moment of 0h was the most critical, presenting higher values of glycemia, erythroblasts and erythrocytes. Late secondary responses were observed to total plasmatic protein, mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) at 6h, returning to baselines values after this time. Leukocyte number was not affected by stress of transportation. The stress by transportation was not severe to influence the health of P. oligospila, indicating that fish is resistant to stress if compared to other species. However, we recommended no stressful procedures for at least 24 hours for recovery, in order to ensure health and survival of fish.

摘要 本研究旨在评估经受运输应激的寡斑梳钩鲶（bola-pleco，Peckoltia oligospila）的血液学应激响应。本研究于运输后0、6、24、48、72及96小时对其血液参数的变化展开分析。运输后0至6小时可检测到该鱼种的应激反应，但多数血液参数于运输后24小时内即可恢复至基线水平。运输后0小时为应激反应最显著的时间节点，此时血糖、成红细胞及红细胞计数均处于较高水平。血浆总蛋白、平均红细胞体积（mean corpuscular volume, MCV）及平均红细胞血红蛋白量（mean corpuscular hemoglobin, MCH）则于运输后6小时呈现迟发性继发应激反应，并于该时间点后恢复至基线水平。白细胞计数未受本次运输应激的影响。本次运输应激未对寡斑梳钩鲶的健康造成显著不良影响，表明相较于其他鱼类物种，该鱼种具备较强的应激耐受能力。但为保障该鱼种的健康与存活率，本研究建议至少在运输后24小时内避免开展任何可引发应激的操作，以确保其充分恢复。