Norman Halden from the University of Manitoba developed the technique offish otolith
microchemistry and the Yukon Research Centre, Access Consulting Group, and Na-cho Nyak Dun First Nation applied it on fish from the Keno Hill mining district.
The results of this study indicate that the sagittal otolith
is the most appropriate structure for determining the age of American shad.
Previous work has validated daily otolith
increment deposition in the Tidewater Goby (Hellmair 2010), and increments were assumed to be daily in the Arrow Goby.
collection, dating to the 1960s, had been sitting in an old Sand Point hangar belonging to the National Oceanic and Atmospheric Administration (NO).
However, testing that involved counting the rings of the fish's otolith
- essentially an ear bone - puts the age of Liebman's fish at 64.
If readers disagreed on age of an otolith
, the otolith
was later re-read by both observers together.
may identify the species of fish to which it belonged - should the fish itself no longer be available for examination.
In other studies with other fishes, vertebrae and otolith
age readings gave similar results for the age of burbot, Lota lota, and thus both the structures were recommended for age and validation studies of the fish (Guinn & Hallberg, 1990).
Subsequently, a small granule of chalk may have formed in the canal, an otolith
, and when you move your head this grain of chalk takes a few seconds to fall.
Dr Jayabalan will throw light on fisheries statistics, and concept of stock and population, maturation and spawning in fish and identification of maturity stages of fish (macroscopic scale/histology), estimation of gonado-somatic index (GSI) and length at first maturity while Laith Jawad will talk on principles of taxonomy of fishes, use of otolith
and scale morphology in fish identification.
Founded in London in 2002 by artists and cultural theorists Kodwo Eshun and Anjalika Sagar, the Otolith
Group (a 2010 Turner Prize nominee) examines the nature of human memory and perception through a mesmerizing array of films, texts, and media-related activities.
Angela de la Cruz and The Otolith
Group were the other artists in the running for the award.