Spectra fishing twine entanglement of a bottlenose dolphin: a case study and experimental modeling.

Autor: Barco SG; Virginia Aquarium Research & Conservation Division, Stranding Response Program, Virginia Beach, VA 23451, USA. sgbarco@virginiaaquarium.com, D'Eri LR, Woodward BL, Winn JP, Rotstein DS
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2010 Sep; Vol. 60 (9), pp. 1477-81. Date of Electronic Publication: 2010 May 31.
DOI: 10.1016/j.marpolbul.2010.05.005
Abstrakt: We report here the first documented case of a cetacean fatality from entanglement in recreational Spectra fishing twine. Spectra twine is a relatively new microfilament braided twine that is marketed to replace nylon monofilament twine in rod and reel fisheries. Following the case of this entangled bottlenose dolphin (Tursiops truncatus), we conducted tests with Spectra and comparable monofilament twines on Tursiops tissue from stranded animals to compare the abrasion properties of the twines. We found that Spectra twine was significantly more abrasive on bottlenose dolphin fluke tissue than a similar strength and diameter monofilament. With the same forces applied, the Spectra twine cut deeper than the monofilament, exhibiting a linear relationship with force applied where the monofilament appeared to reach a maximum depth of penetration of approximately 2 mm. These tests may explain why this bottlenose dolphin was so severely debilitated from carrying a relatively light load of twine over a short period of time (20 days). Future public and corporate outreach will be essential to minimize the effect that this increasingly popular fishing twine will have on non-target species.
(Copyright 2010 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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