Estimation of Growth and Size at First Maturity under a Multimodel Approach of <i>Anadara tuberculosa</i> (Sowerby, 1833) on the Southeast Coast of the Gulf of California
2023
Gilberto Genaro Ortega-Lizárraga | Maleny Lizárraga-Rojas | Lorenia Guadalupe Gómez-Medina | Juan Eduardo Guzmán-Ibarra | Horacio A. Muñoz-Rubí | Jaime Edzael Mendivil-Mendoza | Eugenio Alberto Aragón-Noriega
The clam fishery in northwestern Mexico encompasses the mangrove cockle <i>Anadara tuberculosa</i>. It is extracted manually, at low tides and between the roots of mangroves. Biological samplings were carried out in Estero Las Lajitas, Sinaloa, from May 2021 to April 2022. A total of 661 <i>A. tuberculosa</i> organisms were analyzed, of which 126 were males, were 363 females and 172 were undifferentiated, yielding a statistically different overall sex ratio between females and males (1♀:0.3♂) (X<sup>2</sup> = 113.19; <i>p</i> < 0.05). The length–weight relationship showed a potential type (W = 0.0002L<sup>3.125</sup>) (95% CI 3.027–3.222 for <i>b</i>). To determine the growth of the species, five models were employed: von Bertalanffy, Gompertz, Logistic, Richards, and Gompertz using an oscillatory component (GO). The Akaike Corrected Information Index for Small Samples (AIC<sub>C</sub>) was used. The GO model yielded the lowest AIC<sub>C</sub> (L∞ = 80.98 mm 95% CI 77.59–84.36, k = 1.02 year<sup>−1</sup> 95% CI 0.89–1.16), a low growth oscillation intensity (C = 0.03), and slower growth in August (WP = 1.67). The Logistic and Gompertz models were used to calculate the size-at-maturity (L<sub>50%</sub>). Gompertz obtained the lowest AIC<sub>C</sub> with L<sub>50%</sub> = 32.53 mm (95% CI 30.67–34.31). Considering the lack of biological information and the parameters generated in the present investigation, as regards <i>A. tuberculosa</i> on the coast of Sinaloa, Mexico, its dissemination is essential for the adequate management of the fishery.
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