Otolith shape classification for fish stock discrimination

2014 ◽  
Author(s):  
Jose Antonio Soria ◽  
Kamal Nasreddine ◽  
Vicenc Parisi-Baradad ◽  
Lluis Ferrer-Arnau ◽  
Abdesslam Benzinou
Keyword(s):  
Fish Stock ◽  
Shape Classification ◽  
Otolith Shape ◽  
Stock Discrimination

Otolith shape analysis as a tool for stock discrimination of forkbeard (Phycis phycis) in the Northeast Atlantic

Hydrobiologia ◽  
2014 ◽  
Vol 728 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Ana Rita Vieira ◽  
Ana Neves ◽  
Vera Sequeira ◽  
Rafaela Barros Paiva ◽  
Leonel Serrano Gordo
Keyword(s):  
Shape Analysis ◽  
Otolith Shape ◽  
Otolith Shape Analysis ◽  
Northeast Atlantic ◽  
Stock Discrimination ◽  
Phycis Phycis

FISH OTOLITHS ANALYSIS BY PIXE: APPLICATION TO STOCK DISCRIMINATION

1995 ◽  
Vol 05 (02n03) ◽  
pp. 153-157
Author(s):  
NOBUAKI ARAI ◽  
NORIYUKI TAKAI ◽  
WATARU SAKAMOTO ◽  
KOJI YOSHIDA ◽  
KUNIKO MAEDA
Keyword(s):  
Calcium Concentration ◽  
Lake Biwa ◽  
Sea Bream ◽  
Fish Stock ◽  
Red Sea Bream ◽  
Pixe Analysis ◽  
Trace Elemental Analysis ◽  
Stock Discrimination ◽  
Trace Elemental ◽  
Fish Otoliths

Fish otoliths are continuously dsposited from fish birth to its death along with encoding environmental information. In order to decode the information, PIXE was adopted as trace elemental analysis of the otoliths. Strontium to calcium concentration ratios of red sea bream otoliths varied among rearing stations. The Sr/Ca ratios of Lake Biwa catfishes also varied between male and female and among fishing grounds. The PIXE analysis was applied to the fish stock discrimination.

scholarly journals Fin spine metals by LA-ICP-MS as a method for fish stock discrimination of Genidens barbus in anthropized estuaries

2020 ◽  
Vol 230 ◽  
pp. 105625 ◽  
Author(s):  
Esteban Avigliano ◽  
Nathan Miller ◽  
Barbara Maichak de Carvalho ◽  
Sofía Córdoba Gironde ◽  
Andrea Tombari ◽  
...  
Keyword(s):  
Fish Stock ◽  
Stock Discrimination ◽  
Icp Ms

Usefulness of Fourier Analysis of Otolith Shape for Atlantic Mackerel (Scomber scombrus) Stock Discrimination

1991 ◽  
Vol 48 (2) ◽  
pp. 296-302 ◽  
Author(s):  
Martin Castonguay ◽  
Patrick Simard ◽  
Pierre Gagnon
Keyword(s):  
Stock Structure ◽  
Discriminant Functions ◽  
Position Effects ◽  
Northwest Atlantic ◽  
Otolith Shape ◽  
Atlantic Mackerel ◽  
Scomber Scombrus ◽  
The North ◽  
Stock Discrimination ◽  
The North Sea

We compared shapes of Atlantic mackerel (Scomber scombrus) sagittae between the two contingents (i.e. spawning groups) from the Northwest Atlantic and between the stocks from the Northwest Atlantic and the North Sea to evaluate whether otolith shape could differentiate between the two contingents in a mixed fishery. We quantified shapes with the Fourier series, an objective and rapid method which decomposes a shape's outline into a series of sinusoids. To determine a correct way to compare contingents/stocks, we first assessed four intracontingent effects on otolith shapes. Age and year-class effects were significant, while sex and bilateral position effects were not. This temporal instability in shapes indicates that confounding effects of age and year-class on otolith shapes need to be assessed carefully before drawing conclusions on stock structure. It also shows that comparative studies of otolith shapes with Fourier descriptors are not useful for mackerel contingent discrimination. The power of discriminant functions to correctly classify test mackerel samples separated by age and sampling year, on the basis of otolith shape, was better for comparisons between the stocks than for those between the contingents.

scholarly journals Using otoliths for fish stock discrimination: status and challenges

2021 ◽  
Vol 51 (2) ◽  
pp. 199-218
Author(s):  
Aafaq Nazir ◽  
Mohammad Afzal Khan
Keyword(s):  
Abiotic Factors ◽  
Fish Population ◽  
Interactive Effects ◽  
Conservation Strategies ◽  
Fish Stock ◽  
Otolith Chemistry ◽  
Research Areas ◽  
Stock Discrimination ◽  
Factors Influencing ◽  
Complementary Approach

Otoliths are calcified structures and the information contained within their chemistry or shape can be used to infer life history events, migration patterns, and stock structure of a fish population. Understanding how otolith chemistry is affected by temperature, salinity, interactive effects of abiotic factors, ontogeny, physiology, etc. is essential for the reconstruction of the environment that affected the fish. Otolith shape is also affected by environmental conditions in addition to the genotype. The applications of otolith chemistry and shape for stock discrimination have increased in recent years because of the advancements in analytical methods and the related software. The stock identification methods sometimes provide variable results but if we use complementary approach the information generated could be more reliable which can be used to prepare effective management and conservation strategies. It appears warranted to generate more information on the factors influencing otolith chemistry and shape especially when two or more factors exert synergetic influence. Therefore, the objectives of this review paper were to provide comprehensive information on various factors influencing the otolith chemistry and shape, and the utility of otolith chemistry and shape for fish stock discrimination with an emphasis towards the research areas needing additional studies.

Sign in / Sign up

Export Citation Format

Share Document