Nawastuti D, Darwanto DH, Mulyo JH, Suadi. 2023. Consumer perceptions of stingrays in coastal areas of Indonesia. Biodiversitas 24: 6844-6851. Stingray populations harvested for food may pose risks ...to food security and conservation goals. The purpose of this research is (i) to determine the type of fish product based on how consumers obtain the product, (ii) to determine the gender of consumers based on the type of product, and (iii) ii) to determine the type of fish product for consumption purposes. Primary data were collected from Google Forms and followed by interviews with selected households. The number of respondents was 125 people from Java Island, Timor Island, Sumba Island, Adonara Island, Lembata Island, Bangka Belitung Island and Flores Island. The information obtained was investigated using Chi-square analysis to understand consumer preferences for fish consumption using an adaptation of SPSS 25 programming. The results of the research show that there are two relationships, namely (i) the type of fish product has a significant relation to fishing, the way consumers fish, the fishery products they buy and (ii) consumer gender has a significant relationship with product type because male consumers find it easier to get stingrays by fishing so they are easier to consume individually, in groups, or to sell. A proper understanding of gender differences in stingray consumption can help determine the sustainability of stingray fisheries in a region because it can be known exactly who can access sustainable food. Although there are several types of stingrays that are protected, other types of stingrays should not be consumed. The results we obtained can be useful for increasing public awareness regarding the use of fish catching and its impact on the carrying capacity of fisheries in Indonesia.
This study aimed to determine whether the long-term transport model of cururu stingray (Potamotrygon wallacei) could disturb the brain redox status and brain functions, including antioxidant ...defenses, signaling pathways activated by oxidative stress, and the physiological responses to transport-induced stress upon arrival and after its recovery; and also to identify how the addition of essential oil of Lippia alba (EOLA) in the water transport could influence on these changes. For this reason, the cururu stingrays were anesthetized with 200 mg/L eugenol and sampled by sectioning of the spinal cord before transport (n = 5), after 32 h-transport in the absence (n = 5) and presence of 10 μL/L of the EOLA (n = 5); and after recovery for 24 h and 48 h post-transport without and with EOLA (n = 5, each group) for blood and brain removal, totalizing 35 animals (four replicates). Transport triggered a rise in the levels of lactate in plasma and brain of cururu stingray on arrival. Besides, it increased the superoxide anion (O2•-) and hydrogen peroxide (H2O2) levels, and decreased the superoxide dismutase (SOD) 1 and 2, catalase, glutathione peroxidase (GPx) 1, and glutathione reductase (GR) activities, activated nuclear factor κB (NF-κB), led to glutathione oxidation, lipid peroxidation (measured through the thiobarbituric acid reactive substances (TBARS)), and elevated heat shock protein 70 (HSP70) levels in the cururu stingray brain. The addition of the EOLA to water protected brain against stress and oxidative stress on arrival, speeding up a process that could take until 48 h to occur in the absence of this additive. To reach this response, the EOLA decreased lactate levels in plasma and brain of cururu stingray, and also reduced O2•- and H2O2 levels, and NF-κB activation, increased SOD2, catalase, GPx1 and GR activities, decreased the ratio between oxidized and reduced glutathione, avoiding the increase in the TBARS levels in the brain tissue, and regulated the physiological responses to stress, as illustrated by low HSP70 levels found in it. These data make the addition of EOLA to the water even more recommended for long-term transport of cururu stingrays.
•Cururu stingray transport increases lactate in plasma and brain.•Transport triggers reactive oxygen species formation in brain.•The antioxidant defenses are deficient in the brain after transport.•Lippia alba essential oil decreases transport-induced oxidative stress.•Lippia alba regulates the physiological responses to stress.
Stingrays, including longheaded eagle ray(Aetobatus flagellum),have been the target of eradication activities as they are considered to prey on short-neck clams(Ruditapes philippinarum).However, ...stingrays play a critical role as a keystone species in tidal flat communities. To date, the assessment of stingray predation on short-neck clams has only been limited to laboratory experiments and gut content analyses. Therefore, to conserve both stingrays and short-neck clams, it is necessary to quantitatively evaluate the stingray predation on short-neck clams. In this study, we focused on the foraging pits made by stingrays on the Midorikawa River tidal flat in Ariake Bay, Kyushu, Japan. Moreover, we estimated the rate of stingray predation on short-neck clams and examined the magnitude of the effects of predation on the decline of short-neck clams using unmanned aerial vehicle and quantitative surveys. We found that the maximum rate of stingray predation on short-neck clams was 0.29% per day, which accounted for approximately 17.7% of the overall mortality rate of short-neck clams during the same month. Therefore, our findings suggest that stingray predation exerts only a limited effect on the decline of short-neck clam stocks in the study area.
Injuries from stingray fish are among the most common fish stings, and their frequency is increasing with the increase in global tourism. It most commonly causes injuries to the extremities and ...causes morbidity if not treated appropriately. Less commonly, life-threatening injuries can be observed due to injuries in the thorax and abdomen and damage to large vessels and vital organs. In addition to severe pain, tissue necrosis, and secondary infection after injury, systemic symptoms may occur. Since these injuries can occur in both fresh and salt water, it is possible to encounter such a case at any time. Flat spines are sharp, with backward barbs or serrations that make them difficult to extract once they penetrate tissue. After first aid, surgical extraction of the stingray spine with minimal damage is essential in addition to local and systemic treatments. In the literature, there are studies on envenomation and other systemic findings after stingray spine injuries, but few publications are available on the stingray spine extracted technique after injury. This case report presents a new and helpful technique for stingray spine extraction.
The diamond ray Gymnura natalensis is endemic to southern Africa where its preference for shallow coastal habitats makes it vulnerable to recreational shore-based angling. Although it makes up ...approximately 1% of the shore-based tag numbers, little is known about its movements, reproduction or population status in South Africa. This study used three independent long-term (34-41 years) datasets, including tagging by recreational anglers, competitive shore angling catches and shark net catches, to investigate the species' movements, catch composition and population status in South Africa. Of the 3 739 individuals tagged (1984-2018), only 30 (1%) were recaptured after an average of 487 days at liberty. The majority (60%) of the recaptures occurred within 10 km of the release site, while 7% had moved more than 1 000 km along the coast. The longest recorded movements (1 577 and 1 756 km) were undertaken by adult rays tagged in the Western Cape Province moving to KwaZulu-Natal Province (KZN). The competitive shore angling catch (1977-2018; n = 9 150) from KZN was dominated by adult rays caught north of Durban, while the shark net catch in KZN (1981-2018; n = 584) was dominated by juvenile rays primarily from the central beaches of Durban. All the datasets exhibited strong seasonal trends with most catches taking place in summer. A risk assessment confirmed a stable to increasing population trend over four generations, suggesting that the population sampled along the east coast of South Africa should be classified as Least Concern.
Background
The predictors of success of chronic total occlusion (CTO) percutaneous coronary intervention (PCI) through antegrade dissection and re‐entry (ADR) using the Stingray system (Stingray ADR) ...remain elusive, mainly owing to the lack of consecutive angiographic and procedural records of patients.
Objectives
This study aimed to identify indicators that can determine the success of CTO PCI performed using the Stingray ADR technique.
Methods
The clinical data of 115 patients who underwent CTO PCI through Stingray ADR at the same cardiac center were retrospectively and consecutively collected. Multivariate logistic regression analysis was performed to investigate the indicators of the success of ADR attempts.
Results
The technical success rate of Stingray ADR in CTO PCI was 72.2%. The overall technical success rate of CTO recanalization was 78.3% in all CTO PCIs having used Stingray Low Profile balloon. Vessel calcification (odds ratio OR: 4.03; 95% confidence interval CI: 1.49−11.88; p = 0.008), and retrograde puncture indicator (OR: 4.89; 95% CI: 1.51−17.11; p = 0.009) were identified as independent positive predictors. Blunt/no stump proximal to the occlusion segment (OR: 0.22; 95% CI: 0.06−0.64; p = 0.009), decision time before Stingray ADR (per 1 h increase) (OR: 0.54; 95% CI: 0.31−0.92; p = 0.026), operation duration of Stingray ADR (per 10 min increase) (OR: 0.62; 95% CI: 0.40−0.94; p = 0.028), and puncture site at the intraplaque region (OR: 0.24; 95% CI: 0.06−0.84; p = 0.026) were identified as the four negative independent predictors.
Conclusions
This study revealed independent predictors of the success of CTO PCI performed using the Stingray ADR technique. As for CTO characteristics, the presence of calcification in the CTO segment and a tapered stump proximal to the lesion site can facilitate successful Stingray ADR. As for the procedures, the success rate of Stingray ADR can be improved by initiating the technique decisively and promptly, operating the system quickly and accurately and creating a puncture in the distal cap region of CTO under retrograde guidance.
Abstract
The stingray, a seemingly harmless cartilaginous fish, is capable of causing painful injuries and envenomation in humans. There is no known peer reviewed case report involving dogs in a ...veterinary journal at the time of writing this case report. Poor management of the condition or overzealous attempts to remove embedded barbs has resulted in complications in humans. This case report presents an effective approach to the treatment of stingray envenomation in dogs which is likely to be reproducible in other domestic animals. Clearly elucidated are the principles behind antibiotic therapy in the treatment of stingray injuries and the benefit of lignocaine injection in cases of embedded stingers. There is a need for case reports to enhance clinical knowledge of stingray management in domestic animals. This case report, thus, serves as an impetus for future research in this area of veterinary medicine.
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