Aspectos ecológicos y morfológicos de luidia senegalensis (echinodermata: asteroidea) asociados a la captura incidental de la pesca de arrastre en el sur del Golfo de Morrosquillo, Caribe colombiano

Abstract

Luidia senegalensis, has been the subject of few studies in the colombian Caribbean, currently it is considered a threatened species in various areas of the Caribbean, Brazil and Colombia. For this reason, the objective was to evaluate the ecological and morphological aspects of the L. senegalensis populations incidentally captured by trawling in the southern Gulf of Morrosquillo. For this, samplings were carried out in the months of november 2019 and february 2020 in two sectors of the southern Gulf of Morrosquillo, in which three trawl trawls were carried out in each one taking into account two contrasting climatic seasons (dry and rain), the collected individuals were counted and measured in situ; Additionally, the substrate samples from the two sampling sites were analyzed, obtaining a bottom (muddy-sandy) for Punta Terraplén and (sandy) for Punta Bonita. The average density of L. senegalensis for Punta Terraplén was 0.010 ± 0.005 ind / m², this being higher than the density registered for the Punta Bonita sector, whose value was 0.008 ± 0.002 ind / m². The average of sizes for the largest radius (R) was 7.23 ± 1.63 cm in the rainy season, presenting maximum values of 10 cm and minimum of 2.8 cm and for the dry season there was an average of 7.09 ± 1.56 cm with a maximum value of 11.3 cm and a minimum of 5.3 cm. Punta Terraplén presented an average of sizes for a greater radius (R) equal to 7.31 ± 1.40 cm, this being greater than that registered in Punta Bonita 6.91 ± 1.48 cm. The ecological aspects studied in this research work generate information of great importance to have references associated with the ecology of this species and to be able to lay the foundations for new research.