Results 1 to 10 of about 30,468 (298)

Using otoliths for fish stock discrimination: status and challenges [PDF]

Acta Ichthyologica et Piscatoria, 2021
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.
Aafaq Nazir, Mohammad Afzal Khan
doaj   +6 more sources

Parasites as Biological Tags for Stock Discrimination of Beaked Redfish (Sebastes mentella): Parasite Infra-Communities vs. Limited Resolution of Cytochrome Markers. [PDF]

PLoS ONE, 2016
The use of parasites as biological tags for discrimination of fish stocks has become a commonly used approach in fisheries management. Metazoan parasite community analysis and anisakid nematode population genetics based on a mitochondrial cytochrome ...
Regina Klapper, Judith Kochmann, Robert B O'Hara, Horst Karl, Thomas Kuhn   +4 more
doaj   +4 more sources

What does external morphometry tell us about stock discrimination of Sardina pilchardus stocks from Türkiye?

Oceanological and Hydrobiological Studies
The analysis of shape is a fundamental part of much biological research. Morphometrics, which incorporates concepts from biology, geometry, and statistics, is the study of the geometrical form of organisms.
Ozpicak Melek, Saygin Semra
doaj   +4 more sources

Stock discrimination of the bogue, Boops boops (Actinopterygii: Perciformes: Sparidae), from two Tunisian marine stations using the otolith shape [PDF]

Acta Ichthyologica et Piscatoria, 2020
Background. The bogue, Boops boops (Linnaeus, 1758), is the most common sparid fish in the Tunisian waters. Despite its economic importance, the stock discrimination of this species is poorly understood up to date.
M. Ben Labidi, M. Mejri, A.A.B. Shahin, P. Quignard J., M. Trabelsi, A.R. Ben Faleh   +5 more
doaj   +4 more sources

Diagnosing Discrimination: Stock Returns and CEO Gender [PDF]

SSRN Electronic Journal, 2006
A vast labor literature has found evidence of a “glass ceiling,” whereby women are under-represented among senior management. A key question remains the extent to which this reflects unobserved differences in productivity, preferences, prejudice, or systematically biased beliefs about the ability of female managers.
Justin Wolfers
openaire   +4 more sources

Discrimination of Schizothorax grahami (Regan, 1904) Stocks Based on Otolith Morphology

Fishes, 2023
Otoliths grow throughout a fish’s life and are important for identifying fish stocks and fish age. This study aims to differentiate different stocks of Schizothorax grahami (Regan, 1904) in the Chishui River, an upper reach of the Yangtze River, by ...
Yang Zhou, Li Xu, Zhongtang He, Weijie Cui, Qun Lu, Jianguang Qin, Shengqi Su, Tao He   +7 more
doaj   +2 more sources

Scale morphometry, geometry and ultrastructure of three Nemipterus species from the Egyptian part of the Red Sea [PDF]

Scientific Reports
The present investigation aimed to document and analyze the diversity of scale characteristics in three Nemipterus species; N. zysron (12.2–18.5 cm SL), N. randalli (13–18 cm SL), and N. japonicus (8.5–17.2 cm SL) collected from the Egyptian Red Sea near
Imam A. A. Mekkawy, Usama M. Mahmoud, Samia M. El-Mahdy, Ola I. Muhammad   +3 more
doaj   +2 more sources

Gill raker counting for approximating the ratio of river- and sea-spawning whitefish, Coregonus lavaretus (Actinopterygii: Salmoniformes: Salmonidae) in the Gulf of Bothnia, Baltic Sea [PDF]

Acta Ichthyologica et Piscatoria, 2015
Background. The ability to distinguish between stocks in mixed fisheries is a prerequisite for a sustainable fisheries management. In the Gulf of Bothnia the relative contribution of endangered river-spawning and sea-spawning whitefish, Coregonus ...
M. Himberg, M. Von Numers, A. Vasemägi, J. Heselius S., T. Wiklund, O. Lill J., H. Hägerstrand   +6 more
doaj   +3 more sources

Form identification of purple flying squid (Sthenoteuthis oualaniensis) based on gladius morphology

Frontiers in Marine Science, 2022
Stock structure information is an important part of bases for understanding the dynamics of cephalopod populations. Purpleback flying squid Sthenoteuthis oualaniensis is an abundant and highly productive species in tropical and subtropical waters of the ...
Kai Zhu, Kai Zhu, Dongming Lin, Dongming Lin, Dongming Lin, Dongming Lin, Xinjun Chen, Xinjun Chen, Xinjun Chen, Xinjun Chen, Kaida Xu, Kaida Xu   +11 more
doaj   +1 more source

Multivariate morphometric investigation to delineate species diversity and stock structure of mud crab Scylla sp. along the coastal regions of Bangladesh

Aquaculture and Fisheries, 2021
Despite the importance of mud crab species (genus Scylla) in both coastal aquaculture and artisanal fisheries, knowledge of the species diversity and stock structure of mud crab population for their sustainable management across the coastal region of ...
Md Asaduzzaman, Ismat Jahan, Aysha Rahi Noor, Md Moudud Islam, Md Moshiur Rahman   +4 more
doaj   +1 more source