Amyloid‐like renal lesions in a roughtail stingray Dasyatis centroura (Mitchill 1815)
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Abstract Gill net stingray isrectangular,has amash size (6 inches) The same size on all nets, Long nets each piece is 50 m and the 3 m. It isthe development ofinformationtechnologygear, newgearincreasedin the study area.This study aims to determine: 1) Specifications and construction gill net stingray, 2) fishing method, 3) fhising ground, 4the number and type of the catch.The method usediswas asurvey methodwithdirect observationof fishing gearusedfishingstingraysandfollowdirectlythe operation offishing gearstingrays, conducting interviewswithfishermenandowners offishing gearstingraysandlearnin depthin order to knowin detailabout thecircumstancesandissues facingstingrayfishinggear.The results, gill net stingray consisting of 70 pieces, 8 catch stingray species in the waters of West Sumatra isstingray fire ( Dasyatis Benetti ), Star stingray ( Himantura Gerrardi ), eagle stingray( Aetobatus Narinari ), stingray mud( Dasyatis Thetidis ), stingray katuko( Neotrygon Kuhlii ), bound stingray ( Aetomylaeus Nichofii ), bat stingray(Gymnura Altavela ), black stingray ( Himantura Pastinacoides ). Keywords : Gill net stingray fish, Stingray fish,Sasak
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Abstract The taxonomic status of the southern African stingray usually referred to Dasyatis pastinaca was investigated. Morphological comparisons were made between specimens of the European Dasyatis pastinaca (Linnaeus 1758), Dasyatis marmorata (Steindachner 1892) from Senegal (Senegambia), and the blue stingray from South Africa and Namibia. The earliest name for blue stingrays is the generally overlooked Trigon chrysonotus Smith, 1828 from South Africa, which is revived, redescribed and has a neotype designated for it. The southern African blue stingray is a separate species from D. pastinaca and differs in coloration, disc length and vertebral and radial counts. However, the southern African blue stingray is considered conspecific with D. marmorata but differs slightly in snout angle and snout-to-vent length. These two are tentatively ranked as subspecies, Dasyatis chrysonota chrysonota (Smith 1828) for the blue stingray of South Africa, Namibia and Angola and D. c. marmorata (Steindachner 1892) for the Senegal blue stingray. Nominal records of blue stingrays exist from Tunisia, Spanish Sahara (Morocco) and Mauritania, tropical West Africa from Liberia to Nigeria, and off Congo, but their status is uncertain. It is uncertain if the known differences between the Senegal and southern African blue stingrays are representative of a north–south clinal gradation, or if there are two or more discrete populations of blue stingrays in the northern and southern hemispheres.
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We report on an injury caused by the bite of a South American freshwater stingray. Although wide excision is the therapy of choice, prolonged healing must be expected. We give some information on the mode of injury and biological data regarding the genus protamotrygon. This stingray may also be bred in aquariums.
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SummaryThe habits of stingrays, stinging action, types of caudal appendages and the structure of the venom apparatus of stingrays are described and the results of experimental studies on stingray venom, the clinical characteristics of stingray wounds and their treatment are briefly discussed.
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A descriptive analysis and review of the world's salient scientific literature on stingray injuries was conducted in light of recent high-profile cases of fatal and near-fatal thoracic stingray injuries to guide clinicians in evaluating and managing stingray injuries. Data was extracted from observational and longitudinal studies over the period, 1950-2006, to permit (1) a stratification of stingray injuries as bites, penetrating lacerations with and without envenoming, and combinations of deeply penetrating and envenoming wounds; and (2) an assessment of new management strategies for thoracoabdominal penetrating trauma and non-healing, necrotic stingray wounds. Unlike their Chondrichthyes classmates, the sharks, stingrays are docile and non-aggressive; and will not attack with their spined tails, unless provoked. Although some occupations are predisposed to stingray injuries, most stingray injuries can be avoided by observing seafloors and adopting simple practices when wading, swimming, diving, or fishing in temperate oceans and some tropical freshwater river systems. All stingray injuries should be managed initially with wound irrigation to dislodge retained spine fragments and envenoming tissues and warm water immersion to inactivate heat-labile toxins.
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