Effect of Mechanical Vibrations During Transport Operations of Nilo Tilapia (Oreochromis niloticus)

Abstract

Oscillatory movements present in the transport of live fish may compromise the physiological stability and the future performance of the animals. Therefore, the objective of this research was to evaluate the effect of mechanical vibrations in the transport of Nile tilapia through vibration levels and shocks occurred in transport boxes previously installed in a truck. The research was carried out in a fish farming integrating company in the state of Ceará, Brazil, with the monitoring of 5 live fish loads. The transport truck used was of the open type, with capacity for five boxes of fiberglass with a useful volume of 2400 L, density of 236 kg m-3. The data were recorded through five dataloggers, to monitor the vibration level (m s-2) and the occurrence and amplitude of mechanical shocks on the roads. Hematological, metabolic and ionic responses of fish were evaluated as well as visual observations of physical injuries. The most intense shocks occurred with the truck between 60 and 80 km h-1, with vibrations 1.151 m s-2 in the transport box, as well as in the water 0.489 m s-2. Larger vibration levels occurred on the asphalt road, with an average value of 1.13 m s-2, while on the dirt road they registered an average of 0.57 m s-2. Vibratory and mechanical stimuli presented secondary responses to blood level stress with alterations in glycemia, hematocrit, hemoglobin and magnesium ions. Physical lesions with 34% severe and 21% moderate, showed an uncomfortable environmental condition to fish.

MS-222 and Propofol Sedation during and after the Simulated Transport of Nile tilapia (Oreochromis niloticus)

“…A naïve group was also included which did not receive any treatment during the experiment being maintained in the 500-L tanks. To simulate transport conditions, the plastic boxes were placed over a table vibrating at a mean 0.62 ± 0.24 m s −2 and producing a noise of 77.8 ± 0.47 dB, thus mimicking the conditions observed in the transport of live animals [ 35 , 36 , 37 ]. In addition, Nile tilapia were transport simulated for 6 h to mimic the common duration of short and regional transportation (range between 4 and 8 h, reviewed in [ 6 ]).…”

How should we monitor welfare in the ornamental fish trade?

“…81 There is little existing research documenting the effect of noise during the transport of ornamental fish, but oscillatory movements during transport have the potential to compromise fish health. 83 A multitude of sounds and vibrations are likely to be experienced by fish in the ornamental trade including engine noise, human speech and noise from aquarium filters as well as vibrations associated with noise. Aquarium filters mask auditory hearing of goldfish (Carassius auratus), specifically when filter frequency noises are at 15-19 dB (0.1-0.3kHz) and recommendations have been made for hobbyists to purchase quiet filter setups to improve welfare conditions within home aquaria.…”

“…For example, in zebrafish, sound exposure (112 dB re 1 µPa) altered group cohesion, swimming velocity and location of fish in the water column 81 . There is little existing research documenting the effect of noise during the transport of ornamental fish, but oscillatory movements during transport have the potential to compromise fish health 83 . A multitude of sounds and vibrations are likely to be experienced by fish in the ornamental trade including engine noise, human speech and noise from aquarium filters as well as vibrations associated with noise.…”

Congresso Internacional Educar na(s) Infância(s) : experiências, desafios e tensões/ Relatos

“…Em 2022 a Pallas lançou uma nova edição revisada da obra com o título Os príncipes do destino: Os odus de Ifá e suas extraordinárias histórias, lindamente ilustrada por Anna Cunha.46 Sobre a trajetória deAgenor Miranda Rocha, ver Sodré e Lima (1996), Rebouças Filho (1998 eBasso (2016).são…”