Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican Pacific
The present study analyzed the growth pattern of the stingray <i>Urotrygon chilensis</i> caught as bycatch by the shrimp fishery in the southeastern Mexican Pacific. From January to December 2012, the thoracic vertebrae of 491 females and 205 males were collected. Female ages ranged from...
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2025-05-01
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| author | Ana Bricia Guzmán-Castellanos Enrique Morales-Bojórquez Hugo Aguirre-Villaseñor Javier Tovar-Ávila |
| author_facet | Ana Bricia Guzmán-Castellanos Enrique Morales-Bojórquez Hugo Aguirre-Villaseñor Javier Tovar-Ávila |
| author_sort | Ana Bricia Guzmán-Castellanos |
| collection | DOAJ |
| description | The present study analyzed the growth pattern of the stingray <i>Urotrygon chilensis</i> caught as bycatch by the shrimp fishery in the southeastern Mexican Pacific. From January to December 2012, the thoracic vertebrae of 491 females and 205 males were collected. Female ages ranged from 0 to 14 years, whereas male ages ranged from 0 to 12 years. The marginal increment and edge analyses suggested the annual formation of growth bands in the vertebrae. The size-at-age data were analyzed using the multimodel inference approach; six candidate growth models were compared, including models with a theoretical age-at-zero total length, mean size-at-birth, and generalized models. Based on Akaike’s information criterion, the best statistical fit to the size-at-age data was the two-phase Gompertz growth model (k = −0.13, G = 1.59, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>L</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></semantics></math></inline-formula> = 10.40) for males and the two-parameter Gompertz growth model (k = 1.42, α = 0.15, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>L</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></semantics></math></inline-formula> = 10.90) for females. In this study, we compare the growth parameters among batoid species, finding that <i>U. chilensis</i> has a relatively short lifespan, slower growth, and that females are larger than males. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-05-01 |
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| spelling | doaj-art-be489a2d97284df2b213c30ec0c81f512025-08-20T03:47:57ZengMDPI AGFishes2410-38882025-05-0110523210.3390/fishes10050232Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican PacificAna Bricia Guzmán-Castellanos0Enrique Morales-Bojórquez1Hugo Aguirre-Villaseñor2Javier Tovar-Ávila3Biology and Conservation of Chondrichthyans, Chondrolab, Department of Marine Sciences and Natural Resources, Universidad de Valparaíso, Av. Borgoño #16344, Viña del Mar 2520000, ChileDirección de Investigación Pesquera en el Pacífico, Instituto Mexicano de Investigación en Pesca y Acuacultura Sustentables, Avenida México 190 del Carmen, Coyoacán, Ciudad de Mexico 04100, MexicoCentro Regional de Investigación Acuícola y Pesquera-Mazatlán, Instituto Mexicano de Investigación en Pesca y Acuacultura Sustentable, Ave. Camarón Sábalo S/N, Estero del Yugo, Mazatlán 82000, MexicoCentro Regional de Investigación Acuícola y Pesquera-Bahía Banderas, Instituto Mexicano de Investigación en Pesca y Acuacultura Sustentables, Calle Tortuga 1, La Cruz de Huanacaxtle 63732, MexicoThe present study analyzed the growth pattern of the stingray <i>Urotrygon chilensis</i> caught as bycatch by the shrimp fishery in the southeastern Mexican Pacific. From January to December 2012, the thoracic vertebrae of 491 females and 205 males were collected. Female ages ranged from 0 to 14 years, whereas male ages ranged from 0 to 12 years. The marginal increment and edge analyses suggested the annual formation of growth bands in the vertebrae. The size-at-age data were analyzed using the multimodel inference approach; six candidate growth models were compared, including models with a theoretical age-at-zero total length, mean size-at-birth, and generalized models. Based on Akaike’s information criterion, the best statistical fit to the size-at-age data was the two-phase Gompertz growth model (k = −0.13, G = 1.59, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>L</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></semantics></math></inline-formula> = 10.40) for males and the two-parameter Gompertz growth model (k = 1.42, α = 0.15, <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mrow><mi>L</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></semantics></math></inline-formula> = 10.90) for females. In this study, we compare the growth parameters among batoid species, finding that <i>U. chilensis</i> has a relatively short lifespan, slower growth, and that females are larger than males.https://www.mdpi.com/2410-3888/10/5/232batoidsbycatchvertebra growth bandssize-at-ageGompertz growth model |
| spellingShingle | Ana Bricia Guzmán-Castellanos Enrique Morales-Bojórquez Hugo Aguirre-Villaseñor Javier Tovar-Ávila Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican Pacific Fishes batoids bycatch vertebra growth bands size-at-age Gompertz growth model |
| title | Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican Pacific |
| title_full | Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican Pacific |
| title_fullStr | Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican Pacific |
| title_full_unstemmed | Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican Pacific |
| title_short | Model Selection Applied to Growth of the Stingray <i>Urotrygon chilensis</i> (Günther, 1872) in the Southeastern Mexican Pacific |
| title_sort | model selection applied to growth of the stingray i urotrygon chilensis i gunther 1872 in the southeastern mexican pacific |
| topic | batoids bycatch vertebra growth bands size-at-age Gompertz growth model |
| url | https://www.mdpi.com/2410-3888/10/5/232 |
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