Survival rates and physiological recovery responses in the lesser-spotted catshark (Scyliorhinus canicula) after bottom-trawling

Barragán-Méndez, Cristina; Ruíz-Jarabo, Ignacio; Fuentes, Juan; Mancera, Juan Miguel; Sobrino, Ignacio

doi:10.1016/j.cbpa.2019.03.016

Cited by 26 publications

(45 citation statements)

References 43 publications

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“…The stress response following air-exposure elicited an immediate increase in muscle lactate levels at 0 h, and in liver at 0 and 5 h (Figure 4). An increase in plasma lactate levels after air-exposure was previously observed in a complementary study (Barragán-Méndez et al, 2019). Gluconeogenic enzymes such as LDH, which converts lactate into pyruvic acid, and FBP, which converts 1,6-biphosphate to fructose 6-phosphate in gluconeogenesis, are shown in Table 3.…”

Section: Resultssupporting

confidence: 70%

“…Lesser spotted catshark adults of both sexes ( n = 46, 380.6 ± 12.0 g body weight and 50.7 ± 0.5 cm total length, mean ± SEM) were obtained by bottom trawling as described before (Barragán-Méndez et al, 2018, 2019) and maintained in the experimental fish facility of the Faculty of Marine and Environmental Sciences (Puerto Real, Cadiz, Spain) for 17 days until the start of the experiment. Fish were randomly divided into six tanks of 400 L (0.72 m 2 surface area, 0.56 m depth) covered by a fine-mesh tissue for shadowing the aquarium, at a stocking density of 7 or 8 fish per tank, as described for other demersal shark species (Wood et al, 2010; Deck et al, 2016).…”

Section: Methodsmentioning

confidence: 99%

“…Three tanks containing 7 or 8 fish each served as control and were left undisturbed, while fish of three tanks were exposed to air in order to elicit an acute stress response. Hereto, fish were caught by hand and placed in a dry tank for 18 min, being the average time catsharks are exposed to air during commercial fishing procedures (Barragán-Méndez et al, 2019), after which fish were allowed to recover in oxygen-saturated (>90% O 2 saturation) seawater (all environmental conditions were kept identical to those before the experiment) with fine bubbles from an air stone to ensure maximum gas exchange efficiency. Air-exposure procedures started at 08.30 h. Samples of 2 or 3 fish per tank (total per treatment was 7 or 8 fish) were collected immediately (0 h), 5 and 24 h after air exposure, respectively.…”

Section: Methodsmentioning

confidence: 99%

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Plasma 1α-Hydroxycorticosterone as Biomarker for Acute Stress in Catsharks (Scyliorhinus canicula)

et al. 2019

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Glucocorticoids are pleiotropic steroid hormones mediating redistribution of energy. They induce breakdown of glycogen stores and consequent plasma hyperglycaemia after stressful situations. Glucocorticoid actions in most vertebrate species are exerted by cortisol and corticosterone. However, 1α-hydroxycorticosterone is the dominant corticosteroid hormone in elasmobranchs, though its effects as a glucocorticoid are unknown. Here we demonstrate, by using ultra-performance liquid chromatography coupled to tandem mass spectrometry for the quantification of 1α-hydroxycorticosterone in plasma of the elasmobranch Scyliorhinus canicula, the response of this hormone to an acute-stress situation and for the first time its glucocorticoid action in elasmobranchs. After an acute air-exposure challenge, S. canicula increased plasma levels of 1α-hydroxycorticosterone altogether with enhanced glycolysis and gluconeogenesis pathways to fuel energy demanding tissues, such as white muscle, during the first hours after the stress situation. We foresee our study as a starting point to evaluate stress responses in elasmobranchs, as well as for future applications in the management of these key ecosystem species.

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Section: Resultssupporting

confidence: 70%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Plasma 1α-Hydroxycorticosterone as Biomarker for Acute Stress in Catsharks (Scyliorhinus canicula)

et al. 2019

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“…In our study, all deceased octopus were considered dead in less than 8 h after being introduced into the aquariums. Coinciding with other taxa, survivors (after an acute-stress situation such as being captured and exposed to air) seem to be recovered in a few hours (Barragán-Méndez et al, unpublished) (Bergmann et al, 2001; Costas et al, 2011; Skrzynska et al, 2018; Barragán-Méndez et al, 2019). In this sense, the analysis of certain physiological parameters seems to be a good proxy to evaluate recovery.…”

Section: Discussionmentioning

confidence: 99%

“…Animals were sampled (see description in see section “Sampling”) at times 0 h (immediately after capture and after air exposure) and after a few hours of being introduced into the aquaria. We aimed at the evaluation of the physiological recovery by conducting a time-course survey, assuming that acute-stress responses have been overcome when the physiological variables analyzed reach stable values over time, as described before in crustaceans (Barragán-Méndez et al, unpublished), elasmobranches (Barragán-Méndez et al, 2019), and teleosts (Skrzynska et al, 2018). In order to carry out this objective E. moschata ( n = 55) and E. cirrhosa ( n = 36) captured during 4 independent trawls for each species in March 2017 were randomly introduced into the recovery aquaria.…”

Section: Methodsmentioning

confidence: 99%

Acute-Stress Biomarkers in Three Octopodidae Species After Bottom Trawling

et al. 2019

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Several Octopodidae species have a great potential for the diversification of worldwide aquaculture. Unfortunately, the lack of stress-related biomarkers in this taxon results an obstacle for its maintenance in conditions where animal welfare is of paramount relevance. In this study, we made a first approach to uncover physiological responses related to fishing capture in Eledone moschata , Eledone cirrhosa , and Octopus vulgaris . Captured octopus from all three species were individually maintained in an aquaculture system onboard of oceanographic vessel in south-western waters of Europe. Haemolymph plasma and muscle were collected in animals at the moment of capture, and recovery was evaluated along a time-course of 48 h in Eledone spp., and 24 h for O. vulgaris . Survival rates of these species captured in spring and autumn were evaluated. Physiological parameters such as plasma pH, total CO 2 , peroxidase activity, lysozyme, hemocyanin, proteases, pro-phenoloxidase, anti-proteases, free amino acids, lactate and glucose levels, as well as muscle water percentage, free amino acids, lactate, glycogen and glucose values were analyzed. The immune system appears to be compromised in these species due to capture processes, while energy metabolites were mobilized to face the acute-stress situation, but recovery of all described parameters occurs within the first 24 h after capture. Moreover, this situation exerts hydric balance changes, as observed in the muscle water, being these responses depending on the species assessed. In conclusion, three Octopodidae species from south-western waters of Europe have been evaluated for stress-related biomarkers resulting in differentiated mechanisms between species. This study may pave the way to further study the physiology of stress in adult octopuses and develop new methodologies for their growth in aquaculture conditions.

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Environmental Implications of Discarding Fish in Northern Spanish Coastal Bottom Otter Trawl Fisheries

et al. 2020

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Overfishing contributes to the depletion of fish stocks. Among fishing practices, discarding fish is a waste of valuable resources and results in lost income that is associated with the impact on future stock growth. This practice depends on several factors, although the highest quantity of discards is produced in trawl fisheries. In this work, the impacts of a specific fraction of the Galician (northwest Spain) bottom trawl fishery were evaluated using the ecological footprint, focusing on the contribution of the discarding rate. The fishing grounds and carbon footprints were the categories that were selected for the analysis. The results showed that 11.6 global hectares per ton of catch were required for an average fishing trip, ranging between 2.2 and 27.1. Discards represented 55% of this value, while the carbon footprint only represented 11%.Therefore, measures are needed to reduce the significant impact of discards, especially in these fisheries. The findings indicate that the discard ban promoted by the Common Fisheries Policy could reduce the ecological footprint of these fisheries by 3.4 global hectares per ton of catch landed on average.

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Survival rates and physiological recovery responses in the lesser-spotted catshark (Scyliorhinus canicula) after bottom-trawling

Cited by 26 publications

References 43 publications

Plasma 1α-Hydroxycorticosterone as Biomarker for Acute Stress in Catsharks (Scyliorhinus canicula)

Plasma 1α-Hydroxycorticosterone as Biomarker for Acute Stress in Catsharks (Scyliorhinus canicula)

Acute-Stress Biomarkers in Three Octopodidae Species After Bottom Trawling

Environmental Implications of Discarding Fish in Northern Spanish Coastal Bottom Otter Trawl Fisheries

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