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A non-invasive method based on head morphology to sex mature three-spined stickleback (Gasterosteus aculeatus L.) in rearing conditions

•We proposed a model to sex mature three-spined sticklebacks in rearing conditions.•Method is applicable outside of the breeding season.•Model is based on five distances of the fish’s head.•We can adjust the percentage of type-I errors according to the needs of users. A mathematical model to disting...

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Published in:Mathematical biosciences 2013-08, Vol.244 (2), p.148-153
Main Authors: de Kermoysan, Goulwen, Péry, Alexandre R.R., Porcher, Jean-Marc, Beaudouin, Rémy
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Language:English
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cited_by cdi_FETCH-LOGICAL-c423t-50656ae9ec1ec933bb109fd42b81e136aa615e92553634e8a624b7ff64cbfbb23
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container_end_page 153
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container_title Mathematical biosciences
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creator de Kermoysan, Goulwen
Péry, Alexandre R.R.
Porcher, Jean-Marc
Beaudouin, Rémy
description •We proposed a model to sex mature three-spined sticklebacks in rearing conditions.•Method is applicable outside of the breeding season.•Model is based on five distances of the fish’s head.•We can adjust the percentage of type-I errors according to the needs of users. A mathematical model to distinguish mature female and male three-spined sticklebacks Gasterosteus aculeatus L. 1758 is proposed. This method is based on sexual dimorphism in the head morphology. The discrimination was established on five distances of interest on the head, adjusted by the standard length of fish. The parameters were estimated based on a training set composed of 102 fish with an equilibrium sex ratio and validated on a test set composed of 69 fish. The model estimates the relationship between the percentage of fish that can be sexed with our model and the percentage of fish correctly sexed. For instance, to reach 1% of error in the sex determination, only 53% of the fish should be considered, whereas to reach 5% of error, 90% of the fish can be used. Compared to other available methods to sex G. aculeatus, the model is non invasive, not expensive, rapid, replicable, and can be calibrated outside of the breeding period.
doi_str_mv 10.1016/j.mbs.2013.05.001
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A mathematical model to distinguish mature female and male three-spined sticklebacks Gasterosteus aculeatus L. 1758 is proposed. This method is based on sexual dimorphism in the head morphology. The discrimination was established on five distances of interest on the head, adjusted by the standard length of fish. The parameters were estimated based on a training set composed of 102 fish with an equilibrium sex ratio and validated on a test set composed of 69 fish. The model estimates the relationship between the percentage of fish that can be sexed with our model and the percentage of fish correctly sexed. For instance, to reach 1% of error in the sex determination, only 53% of the fish should be considered, whereas to reach 5% of error, 90% of the fish can be used. 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subjects Animals
Ecotoxicology
Environmental Sciences
Female
Fish
Gasterosteus aculeatus
Head - anatomy & histology
Head - physiology
Head morphology
Life Sciences
Linear discriminant analysis
Male
Models, Biological
Sex Characteristics
Sexual dimorphism
Smegmamorpha - anatomy & histology
Smegmamorpha - physiology
Toxicology
title A non-invasive method based on head morphology to sex mature three-spined stickleback (Gasterosteus aculeatus L.) in rearing conditions
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