Distribution and abundance of Parastichopus parvimensis (Holothuroidea) in islands of the western coast of Baja California South, Mexico, during the reproductive period

Authors

  • María Georgina Gluyas-Millán Centro Regional de Investigación Pesquera-La Paz, INAPESCA-SAGARPA Carretera a Pichilingue km 1 s/n, La Paz, BCS, 23020, México
  • Casimiro Quiñónez-Velázquez Instituto Politécnico Nacional-CICIMAR, Avenida Instituto Politécnico Nacional s/n, Col. Playa Palo de Santa Rita, La Paz, BCS, 23096. México
  • Luis Vicente González-Ania Dirección General de Investigación Pesquera del Pacifico Norte, INAPESCA-SAGARPA, Pitágoras 1320, Col. Santa Cruz Atoyac, México, D.F. 03310. México
  • José R. Turrubiates-Morales Centro Regional de Investigación Pesquera-La Paz, INAPESCA-SAGARPA Carretera a Pichilingue km 1 s/n, La Paz, BCS, 23020, México

Keywords:

Distribution, density, Parastichopus parvimensis, warty sea cucumber, western coast of Baja California Sur.

Abstract

The distribution and abundance of the warty sea cucumber Parastichopus parvimensis in the islands Natividad (NI), Asunción (AI) and San Roque (SRI) on the western coast of Baja California Sur (BCS), Mexico, were examined based in independent data from commercial fishing in March and April 2009. The density was estimated from 345 sample units (SU = 10 m2 ) random selected between 2 and 30 m of depth. In NI, AI and SRI was found an average density and standard deviation (S) of 1.1 (1.02), 0.82 (1.06) and 0.83 (0.9) org/m2, and an average gutted weight of 158, 176, and 149g respectively. Changes in density were analyzed using a generalized linear model (GLM) with Gamma error structure, using the variables of depth and zone (islands) as well as the interaction effect, which was significant (p < 0.01). The analysis revealed a pattern of increasing density with the depth in SRI (p < 0.01) and non-significant in NI and AI. The variability of the density was high at all depths in NI (S = 10.2) and AI (S = 10.6), while SRI was only in >10 m depth (S = 9.0), but much less in water shallow (S = 2.7). The way in which the density varies on each island seems to be modulated by physical and biological characteristics related to the substrate, since 85% of the sampling units were associated with rocky substrate. We discuss possible factors that could influence the density changes with depth.

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Published

2017-01-03

How to Cite

Gluyas-Millán, M. G., Quiñónez-Velázquez, C., González-Ania, L. V., & Turrubiates-Morales, J. R. (2017). Distribution and abundance of Parastichopus parvimensis (Holothuroidea) in islands of the western coast of Baja California South, Mexico, during the reproductive period. HIDROBIOLÓGICA, 23(1), 9–16. Retrieved from https://hidrobiologica.izt.uam.mx/index.php/revHidro/article/view/618

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