Morphometry and allometry of Hexaplex nigritus (Gastropoda: Muricidae) from a coastal lagoon of the Gulf of California

Celeste Osiris Montoya Ponce; Andrés Martín Góngora Gómez; Yuniria Lizeth Guerrero Beltrán; Carlos Humberto Sepúlveda; Lizeth Carolina Villanueva Fonseca; Brenda Paulina Villanueva Fonseca; María Isabel Sotelo Gonzalez; Juan Antonio Hernández Sepúlveda; Tomás E. Isola; Víctor Manuel Peinado-Guevara; Manuel García Ulloa

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Morphometry and allometry of Hexaplex nigritus (Gastropoda: Muricidae) from a coastal lagoon of the Gulf of California

Montoya-Ponce, Celeste Osiris ^[1] ; Góngora-Gómez, Andrés Martín ^[1] ; Guerrero-Beltrán, Yuniria Lizeth ^[1] ; Sepúlveda, Carlos Humberto ^[1] ; Villanueva-Fonseca, Lizeth Carolina ^[2] ; Villanueva-Fonseca, Brenda Paulina ^[2] ; Sotelo Gonzalez, Maria Isabel ^[3] ; Hernández-Sepúlveda, Juan Antonio ^[1] ; Isola, Tomás E. ^[4] ; Peinado-Guevara, Víctor Manuel ^[3] ; García-Ulloa, Manuel ^[1]
1. [1] Instituto Politécnico Nacional
  
  Instituto Politécnico Nacional
  
  México
2. [2] Universidad Autónoma de Occidente
  
  Universidad Autónoma de Occidente
  
  Colombia
3. [3] Universidad Autónoma de Sinaloa
  
  Universidad Autónoma de Sinaloa
  
  México
4. [4] Universidad Nacional de la Patagonia
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Localización: Latin American Journal of Aquatic Research, ISSN-e 0718-560X, ISSN 0716-1069, Vol. 54, Nº. 1, 2026, págs. 85-98
Idioma: inglés
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Resumen
- Although muricid snails are an important ecological and fisheries resource in northwest Mexico, information on their allometry and morphometry is scarce. For one year (February 2022-January 2023), 30 specimens of the “Chinese black” snail, Hexaplex nigritus (shell height = 101.4 ± 13.7 mm, total snail weight = 192.3 ± 89.1 g) were monthly collected from a coastal lagoon of the southeastern Gulf of California. The biometrics of shells (height SH, length SL, width SW, and shell opening width WSO) and operculum (height OH, length OL, and width OW) and weight variables (total snail weight TWS, total hell weight TSW, total tissue weight TTW, total gonad weight TGW, and total operculum weight TOW) of sampled snails were morphometrically analyzed. All biometric indicators of the snail shell and operculum showed significant differences (P < 0.05) monthly and presented linear and positive equations in all associations. The SH/SL relationship represents the most appropriate tool to describe the relative growth of this gastropod (coefficient of determination, R2 = 0.80), considering an empty shell; meanwhile, TWS/SL better describes the shell/weight interaction (R2 = 0.80) for live snails. The water temperature showed a positive correlation with the biometric indicators. The measurements obtained from the shell dimensions of this gastropod indicate that the sampled population consisted of adult snails. These data are fundamental for the management and conservation of this muricid species in the study area, providing valuable information for planning sustainable management strategies.