Variación fenotípica de la langosta espinosa Panulirus argus (Decapoda: Paniluridae) en el Caribe Suroccidental

Abstract

Phenotypic variation of Panulirus argus (Decapoda: Paniluridae) in Southwest Caribbean. The spiny lobster Panulirus argus is an important fishery species in the Western Central Atlantic. Changes in the dispersion range through its life cycle and heterogeneous habitats, suggest that P. argus exhibit phenotypic plasticity. However, the morphometric variation of this species is unknown so far, although this information is relevant in evolutionary studies as well as to solve questions of fishery interest. Thus, the aim of this study was to determine whether P. argus exhibit phenotypic variation between sexes, among five geographic origins and three oceanographic conditions of Southwest Caribbean (Colombian archipelago San Andrés, Providencia y Santa Catalina). A total of 193 P. argus adults were submitted to geometric morphometrics using six landmarks that delimit one half of the sternal plate. The differences in sternal plate size were compared with KruskalWallis and Mann-Whitney Tests. The allometric effect was estimated using Multivariate Regression Analysis, the model of allometric slopes was tested by Multivariate analysis of covariance and the sternal plate shape differences was explored using non-parametric comparisons of Euclidian distances and Neighbour Joinnig trees. The results showed that the morphometric variation of sternal plate of this spiny lobster varied according to the gender since the sexual size and shape dimorphisms were significant. In both sexes, the sternal plate shape differed among oceanographic scenarios as it was evidenced by significant differences among Euclidian distances, and the tendency to cluster by North, Centre and South sections of San Andrés archipelago. Additionally, the morphometric variation resulting from phenotypic plasticity to variable ecological contexts may explain the phenotypic differences among genetically similar populations. This information permits to define management units, support the selection of regulatory policies of this fishery and complement the genetic analysis of the species in this Caribbean region. Rev. Biol. Trop. 64 (3): 975-990. Epub 2016 September 01.

Variabilidad fenotípica en la población de la jaiba invasora Charybdis hellerii (Milne-Edwards, 1867) (Decapoda: Portunidae) en el margen continental del Caribe colombiano

“…La morfometría geométrica se ha utilizado en varias especies de crustáceos para estudiar estructuras como el caparazón en Maguimithrax spinosissimus (Lamark, 1818) (Martínez-Campos et al, 2016) y Licarsinus depurator (Linneaus, 1758) (Rufino et al, 2004), los própodos en Hepatus pudibundus (Herbst, 1785) (Marochi et al, 2015) y la placa esternal en Panulirus argus (Laitrelle, 1804) (Bolaños-Cubillos et al, 2016). En general, se sabe que la fluctuación de las condiciones ambientales a las que los organismos son sometidos en sus primeras etapas de vida induce la variabilidad fenotípica, pues los cambios más importantes del fenotipo ocurren en estas etapas tempranas.…”

Geometric Morphometric Analysis of the Chinese Mitten Crab Eriocheir sinensis: A Potential Approach for Geographical Origin Authentication

“…Geometric morphometric analysis has been widely used to determine the geographical origin of a wide range of wild aquatic animals, including fishes (Walker 1997;Sidlauskas et al 2011), gastropods (Márquez et al 2015), prawns (Zimmermann et al 2012;Torres et al 2014b), and crabs (Torres et al 2014a;Bolaños-Cubillos et al 2016;Metri et al 2016). Apart from the above, these techniques have also been applied for shape variation, sex difference determination, and morphological resilience of cultured fish (Oponda et al 2017;Balazadeh and Litvak 2018) and shrimp (Accioly et al 2013).…”