New publication: Underwater noise and whales in South African waters
Dear MARMAM Colleagues On behalf on my co-authors, I am excited to announce the publication of our latest paper that investigated the sources of underwater noise and the effects of underwater noise on the probability of detecting whale calls off the west coast of South Africa: Shabangu FW, Yemane D, Best G, and Estabrook BJ (2022). Acoustic detectability of whales amidst underwater noise off the west coast of South Africa. Marine Pollution Bulletin 184: 114122. https://doi.org/10.1016/j.marpolbul.2022.114122 Abstract Anthropogenic underwater noise has been shown to negatively affect marine organisms globally; yet little to no noise research has been conducted in most African waters including South Africa's. This study aimed to quantitatively describe sources of underwater noise and effects of underwater noise on the acoustic detectability of Antarctic blue, fin, minke, humpback, and sperm whales off South Africa's west coast. Noise from vessel traffic (<35 km to the location of recorders) dominated the soundscape below 500 Hz while wind-generated noise increased with wind speed above 5 m s-1 and dominated the soundscape above 500 Hz. Acoustic detectability of humpback, minke and sperm whales decreased with increasing ambient noise levels whereas blue and fin whale acoustic detectability increased with the ambient noise levels. We provide baseline information on underwater noise sources and the effects of underwater noise on whale acoustic detectability off the west coast of South Africa. This paper is open access and can be freely downloaded at: https://authors.elsevier.com/sd/article/S0025-326X(22)00804-9. Please feel free to contact me if you have questions or comments on the paper. Kind regards,Fannie _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Fannie W. Shabangu, PhD (he/him) Marine BiologistDepartment of Forestry, Fisheries and the Environment Cape Town, South Africa Mobile: +27 74 220 0210 Tel: +27 21 402 3553E-mail addresses: fshabangu@dffe.gov.za; fannie.shabangu@yahoo.com Research Fellow Mammal Research InstituteWhale Unit University of PretoriaHatfield, South Africa
Dear MARMAM Colleagues On behalf on my co-authors, I am excited to announce the publication of our latest paper that investigated Molecular detection of Vibrio paraheamolyticus in a sperm whale: Abstract On 25 August 2021, a single female sperm whale (Physeter macrocephalus) was found stranded dead in Playa Tuxpan, Veracruz, Mexico. Skin biopsies were obtained and screened for the detection of various potentially pathogenic bacterial genera, using conventional polymerase chain reaction and sequencing of the positive amplicons. We recorded, for the first time, the presence of Vibrio paraheamolyticus in skin samples from P. macrocephalus in the Gulf of Mexico. Additionally, we discuss 29 records reporting strandings of sperm whales from six states of the Mexican Republic. Most of the records are concentrated in the Pacific Ocean. Our findings increase the inventory of bacteria reported in P. macrocephalus worldwide, summarising the knowledge of stranding events in sperm whale populations in Mexico. https://link.springer.com/article/10.1007/s11259-022-10007-8 [https://media.springernature.com/w200/springer-static/cover/journal/11259.jpg]<https://link.springer.com/article/10.1007/s11259-022-10007-8> Molecular detection of Vibrio paraheamolyticus in a sperm whale (Physeter macrocephalus) stranding in northern Veracruz, Mexico | SpringerLink - link.springer.com<https://link.springer.com/article/10.1007/s11259-022-10007-8> On 25 August 2021, a single female sperm whale (Physeter macrocephalus) was found stranded dead in Playa Tuxpan, Veracruz, Mexico. Skin biopsies were obtained and screened for the detection of various potentially pathogenic bacterial genera, using conventional polymerase chain reaction and sequencing of the positive amplicons. We recorded, for the first time, the presence of Vibrio ... link.springer.com Please feel free to contact me if you have questions or comments on the paper. Kind regards, Arturo, Ph. D. [cid:3ac42a47-4cc8-45f1-98bf-d04c38cb02ec]
participants (2)
-
Fannie Shabangu -
Serrano Solis Arturo