@conference {58003, title = {Assessing the effect of aquatic noise on fish behavior and physiology: a meta-analysis approach}, booktitle = {Fourth International Conference on the Effects of Noise on Aquatic Life}, year = {2016}, publisher = {Acoustical Society of America}, organization = {Acoustical Society of America}, address = {Dublin, Ireland}, abstract = {

Due to the extreme distance that sounds can travel through water, many marine species rely on the soundscape for auditory information regarding predator or prey locations, communication, and habitat selection. These species not only take advantage of the prevailing sounds but also contribute to the soundscape through their own vocalizations. Certain sounds have been shown to have negative effects on marine species, resulting in disrupted communication and unbalanced predator-prey interactions. Unfortunately, the vast majority of soundscape studies are biased towards marine mammals, and only recently has attention been directed towards the potential repercussions for fishes. In an attempt to determine the implications that changes to the soundscape may have on the fishes, a meta-analysis was conducted focusing primarily on the role that anthropogenic noises may play in altering fish behavior and physiology. The review identified 3,174 potentially relevant papers of which were 27 used. The analysis indicates that anthropogenic noise has an adverse effect on marine and freshwater fish behavior and physiology. These findings suggest that although certain species may be more susceptible to anthropogenic noise than others, the vast majority of fish have the potential to be negatively affected by noise pollution.

}, doi = {10.1121/2.0000291}, url = {http://asa.scitation.org/doi/abs/10.1121/2.0000291}, author = {Cox, Kieran D. and Brennan, Lawrence P. and Dudas, Sarah E. and Juanes, Francis} } @article {57416, title = {Nonintrusive methods for biomass estimation in aquaculture with emphasis on fish: a review}, year = {2019}, abstract = {

Fish biomass estimation is one of the most common and important practices in aquaculture. The regular acquisition of fish biomass information has been identi- fied as an urgent need for managers to optimize daily feeding, control stocking densities and ultimately determine the optimal time for harvesting. However, it is difficult to estimate fish biomass without human intervention because fishes are sensitive and move freely in an environment where visibility, lighting and stability are uncontrollable. Until now, fish biomass estimation has been mostly based on manual sampling, which is usually invasive, time-consuming and laborious. Therefore, it is imperative and highly desirable to develop a noninvasive, rapid and cost-effective means. Machine vision, acoustics, environmental DNA and resistivity counter provide the possibility of developing nonintrusive, faster and cheaper methods for in situ estimation of fish biomass. This article summarizes the development of these nonintrusive methods for fish biomass estimation over the past three decades and presents their basic concepts and principles. The strengths and weaknesses of each method are analysed and future research direc- tions are also presented. Studies show that the applications of information tech- nology such as advanced sensors and communication technologies have great significance to accelerate the development of new means and techniques for more effective biomass estimation. However, the accuracy and intelligence still need to be improved to meet intensive aquaculture requirements. Through close coopera- tion between fisheries experts and engineers, the precision and the level of intelli- gence for fish biomass estimation will be further improved based on the above methods.

}, keywords = {acoustics, aquaculture, environmental DNA, fish biomass estimation, machine vision, resistivity counter}, doi = {10.1111/raq.12388}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/raq.12388}, author = {Li, Daoliang and Hao, Yinfeng and Duan, Yanqing} } @article {57397, title = {Multi-method assessment of whale shark (Rhincodon typus) residency, distribution, and dispersal behavior at an aggregation site in the Red Sea}, year = {2019}, abstract = {

Whale sharks (Rhincodon typus) are typically dispersed throughout their circumtropical range, but the species is also known to aggregate in specific coastal areas. Accurate site descriptions associated with these aggregations are essential for the conservation of R. typus, an Endangered species. Although aggregations have become valuable hubs for research, most site descriptions rely heavily on sightings data. In the present study, visual census, passive acoustic monitoring, and long range satellite telemetry were combined to track the movements of R. typus from Shib Habil, a reef-associated aggregation site in the Red Sea. An array of 63 receiver stations was used to record the presence of 84 acoustically tagged sharks (35 females, 37 males, 12 undetermined) from April 2010 to May 2016. Over the same period, identification photos were taken for 76 of these tagged individuals and 38 were fitted with satellite transmitters. In total of 37,461 acoustic detections, 210 visual encounters, and 33 satellite tracks were analyzed to describe the sharks\’ movement ecology. The results demonstrate that the aggregation is seasonal, mostly concentrated on the exposed side of Shib Habil, and seems to attract sharks of both sexes in roughly equal numbers. The combined methodologies also tracked 15 interannual homing-migrations, demonstrating that many sharks leave the area before returning in later years. When compared to acoustic studies from other aggregations, these results demonstrate that R. typus exhibits diverse, site-specific ecologies across its range. Sightings-independent data from acoustic telemetry and other sources are an effective means of validating more common visual surveys.

}, doi = {10.1371/journal.pone.0222285}, url = {http://dx.plos.org/10.1371/journal.pone.0222285}, author = {Cochran, Jesse E. M. and Braun, Camrin D. and Cagua, E. Fernando and Campbell, Michael F. and Hardenstine, Royale S. and Kattan, Alexander and Priest, Mark A. and Sinclair-Taylor, Tane H. and Skomal, Gregory B. and Sultan, Sahar and Sun, Lu and Thorrold, Simon R. and Berumen, Michael L.}, editor = {Mourier, Johann} }