Evaluación por métodos científicos del bienestar de los animales acuáticos

Håstein, Tore; Scarfe, A. David; Lund, Vonne

doi:10.20506/rst.24.2.1590

Cited by 59 publications

(13 citation statements)

References 65 publications

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“…The fish physiological response to these acute handling stressors is altered by previous long-term holding conditions (83). Crowding procedures are improved by efforts of reducing their duration and severity, in order to avoid additional suffering, stress, injuries, and mortality (5,9,84,85). Considering the extremely high level and duration of crowding adopted during massive capture on farm A, that handling qualifies as unacceptable in terms of fish welfare, according to classification proposed by Noble et al (26).…”

Section: Discussionmentioning

confidence: 99%

“…Methods of asphyxiation, decapitation with adherence of organs, and the pre-slaughter or slaughter with ice slurry observed in this work do not promote instant unconsciousness. Therefore, these methods cannot be considered humane (5,9,15). Including, there was resistance to allow the monitoring of these practices in at least six properties visited during the construction of this protocol.…”

Section: Discussionmentioning

confidence: 99%

“…For example, the physical manipulation required for fish classification and biometrics management causes physical and psychological stress (8). In addition, water quality and associated environmental factors are areas of great attention by fish stress researchers, with water dissolved oxygen and carbon, pH and temperature and light regimes as the most critical environmental factors for maintaining fish homeostasis (9). Furthermore, there is a strong association between water quality and stocking density in fish farming systems, which is another important critical welfare point in aquaculture.…”

Section: Introductionmentioning

confidence: 99%

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Tilapia On-Farm Welfare Assessment Protocol for Semi-intensive Production Systems

Pedrazzani

Quintiliano²,

Bolfe³

et al. 2020

Front. Vet. Sci.

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The aim of this study was to develop and test a tilapia on-farm welfare assessment protocol, based on Brazilian semi-intensive production systems. The study included two mains steps: the elaboration of tilapia welfare protocol and its on-field feasibility test. The protocol, including the potential indicators organized into health, environmental, nutritional, and behavioral categories, was tested on three farms. Skin, eyes, gills, jaws, fins, and vertebral spine were individually examined in 139 individual tilapias. Water physicochemical parameters and production system were considered. The overall nutritional status of individuals was assessed through body condition factor, feed conversion ratio, feed crude protein ratio, and feed ingestion behavior. During massive capture, signals of stress, level of crowding, and duration of air exposure were registered. Time required for loss of consciousness was evaluated by clinical reflexes and other behaviors during slaughter. Eye, jaw, and gill scores were different across farms (Kruskal-Wallis test, p = 0.011; 0.015; 0.043, respectively), showing good discrimination power. Critical welfare points were extremely low dissolved oxygen in water, fin and skin lesions, prolonged air exposure during pre-slaughter handling and non-humane slaughter techniques, as decapitation or asphyxia. The protocol presents practical viability and it is an initial step for the development of a tilapia welfare strategy, where the prioritization of critical welfare points, implementation of corrective actions and monitoring of the results is part of a permanent welfare management system.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tilapia On-Farm Welfare Assessment Protocol for Semi-intensive Production Systems

Pedrazzani

Quintiliano²,

Bolfe³

et al. 2020

Front. Vet. Sci.

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“…At the end of the fifth week, changes in the average weight of Beluga sturgeon juveniles reared at different densities were investigated ( which can affect the health and finally the growth of fish (Wedemeyer Barton & McLeay 1990;Ellis et al, 2002;Wedemeyer, 1997;Hastein et al, 2005;Sloman, 2002).…”

Section: Growth Performancementioning

confidence: 99%

Effect of different stocking densities on hematological parameters and growth performance of great sturgeon (Huso huso)

Samani

Jafaryan

2017

I J Aqua Anim Health

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A 5-week study was conducted to determine the effects of different stocking density on hematological parameters and growth performance of great sturgeon. Fish were cultured in duplicates of fiberglass tanks under stocking densities of 50, 75, 100 and 125 fish/m3 as T1, T2, T3 and T4 respectively. Based on the results, significant increase (p<0.05) in total body weight and total length were related to low density group. The lowest mean body weight (103.26 g) and length (29.65 cm) were recorded in T4. At the end of the experiment, Results of hematological analysis showed changes in the stocking density had non-significant impact on values of WBC and MCH (p>0.05). The highest mean corpuscular hemoglobin concentration (MCHC) was also recorded in T4. The highest level of hemoglobin, hematocrit (7.25 g dL-1 and 22.2%) were significantly associated with T1 (p<0.05).

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“…While farm animals are already widely acknowledged as sentient beings (Carenzi and Verga 2009), the sentience of other species such as fishes and insects is debated. Although fishes are unlikely to experience the same complexity of emotions as human beings, still several studies suggest that there is anatomical, physiological, and behavioural evidence for fish sentience (Ashley 2007;Hastein et al 2005). The increasing demand for proteins suggests that also alternative protein sources to traditional animal products will have to be exploited more in the future, and insects represent such a potential novel protein source (Boland et al 2013;Rumpold and Schlüter 2013).…”

Section: Introductionmentioning

confidence: 99%

Framework for integrating animal welfare into life cycle sustainability assessment

Scherer

Tomasik²,

Rueda³

et al. 2017

Int J Life Cycle Assess

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Purpose This study seeks to provide a framework for integrating animal welfare as a fourth pillar into a life cycle sustainability assessment and presents three alternative animal welfare indicators. Methods Animal welfare is assessed during farm life and during slaughter. The indicators differ in how they value premature death. All three consider (1) the life quality of an animal such as space allowance, (2) the slaughter age either as life duration or life fraction, and (3) the number of animals affected for providing a product unit, e.g. 1 Mcal. One of the indicators additionally takes into account a moral value denoting their intelligence and self-awareness. The framework allows for comparisons across studies and products and for applications at large spatial scales. To illustrate the framework, eight products were analysed and compared: beef, pork, poultry, milk, eggs, salmon, shrimps, and, as a novel protein source, insects.Results and discussion Insects are granted to live longer fractions of their normal life spans, and their life quality is less compromised due to a lower assumed sentience. Still, they perform worst according to all three indicators, as their small body sizes only yield low product quantities. Therefore, we discourage from eating insects. In contrast, milk is the product that reduces animal welfare the least according to two of the three indicators and it performs relatively better than other animal products in most categories. The difference in animal welfare is mostly larger for different animal products than for different production systems of the same product. This implies that, besides less consumption of animal-based products, a shift to other animal products can significantly improve animal welfare. Conclusions While the animal welfare assessment is simplified, it allows for a direct integration into life cycle sustainability assessment. There is a trade-off between applicability and indicator complexity, but even a simple estimate of animal welfare is much better than ignoring the issue, as is the common practice in life cycle sustainability assessments. Future research should be directed towards elaborating the life quality criterion and extending the product coverage.

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Evaluación por métodos científicos del bienestar de los animales acuáticos

Cited by 59 publications

References 65 publications

Tilapia On-Farm Welfare Assessment Protocol for Semi-intensive Production Systems

Tilapia On-Farm Welfare Assessment Protocol for Semi-intensive Production Systems

Effect of different stocking densities on hematological parameters and growth performance of great sturgeon (Huso huso)

Framework for integrating animal welfare into life cycle sustainability assessment

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