Biología reproductiva de <i>Lutjanus guttatus</i> (Perciformes: Lutjanidae) en el Parque Nacional Natural Utría, Pacífico colombian

Abstract

Reproductive biology of Lutjanus guttatus (Perciformes: Lutjanidae) in Utría National Park, Colombian Pacific. Protected areas are important for natural population conservation since they work as refuge, feeding and breeding areas, where specimens should be exempt from human pressure. The generation of better criteria for management decisions and conservation of fishery resources, is based on the reproductive aspects of species that support fishing activities, since this information is related to the abundance, size and frequency of capture. With this aim, the reproductive biology of the spotted snapper Lutjanus guttatus was studied from April 2008 and February 2009 at the Utría National Park, Colombian Pacific. For this, we analyzed the volume of catch, size structure, sex ratio, fecundity, maturity size, breeding areas and seasons (n=278), of daily landings of 21 units of artisanal fisheries in ten fishing grounds in the Park. Form all landings, we evaluated a total of 4 319 individuals belonging to 84 species. Based on the number of individuals, Lutjanus guttatus ranked third in catches representing 6.4% (278 individuals), and 16th with 1.8% (95.79kg), based on catch biomass. The average weight was 0.34kg ±0.25kg, while 29cm±6.4cm for total length. The total length-weight relationship had the best fit (Kruskal-Wallis, p<0.05, n=272) with the equation P T =0.00000885* L T 3.09 . The occurrence of mature fish and high condition factors suggested a spawning season in June, September and October in sandy and rocky shores. This species showed an asynchronical gonadal development, with a mean sexual maturity size estimated in 23.5cm total length, and an absolute fecundity of 156 253.11 oocytes (mode of 4µm diameter). We concluded that L. guttatus medium sizes observed indicated a fishing pressure on small size specimens (the minimum size being 18cm); thus, we recommend the implementation of minimum catch sizes based on the criterion of size at maturity LT 100 (25.5cm) and to apply seasonal fishing closures during the highest reproductive activity (June-October). However, it is necessary to obtain additional biological information with multi-year monitoring to improve fisheries management criteria in the area. Rev. Biol. Trop. 61 (2): 829-840. Epub 2013 June 01.

Parental contribution in a cultivated stock for the spotted rose snapper Lutjanus guttatus (Steindachner, 1869) estimated by newly developed microsatellite markers

“…The spotted rose snapper, Lutjanus guttatus (Steindachner, 1869), is a demersal marine finfish with a wide distribution range along the eastern Pacific Ocean from the Gulf of California in Mexico to Ecuador (Fischer et al, 1995). It is a valuable fishing resource in the region (Herrera-Ulloa et al, 2010;Sarabia-Méndez et al, 2010;Correa-Herrera & Jiménez-Segura, 2013), with a high potential for aquaculture (Ibarra-Castro et al, 2013). Lutjanus guttatus is a batch spawner with asynchronous ovarian development during a long reproductive season comprising peak spawning periods in April, August and October _________________ Corresponding editor: Fernando Vega (Arellano-Martínez et al, 2001;Sarabia-Méndez et al, 2010).…”

Reproductive cycle of the female Anisotremus scapularis (Tschudi, 1846) on the marine coast of Callao, basic knowledge to go towards its aquaculture

“…Subsequently, a significant reduction of this index was observed during the winter season. The reduction in the hepatosomatic indices is observed at the end of the spawning period, has been described in other fish species with an asynchronous spawning strategy (Rinchard et al, 1993;Arellano-Martıńez et al, 2001;Ruiz-Ramıŕez et al, 2012;Correa-Herrera and Jimeńez-Segura, 2013). In A. scapularis, the HSI presented a seasonal modulation equivalent to the seasonal modulation observed for GSI.…”

Evaluación del estado de los recursos hidrobiológicos en áreas marinas protegidas del Pacífico de Colombia

“…Los casos más extremos son los de las especies T. albacares (capturada con línea de mano) y, E. quinquefasciatus (capturada con espinel) en el PNN Uramba, C. caninus (capturado con trasmallo monofilamento fondera) en el PNN Sanquianga, y L. guttatus (capturado con línea de mano) en el PNN Utría, ya que durante el año evaluado, el 100 % de los individuos fueron capturados por debajo de la TMM reportada en la literatura, lo cual en teoría, indica un alto riesgo de sobrepesca en relación al crecimiento (Pauly, 1983) y atenta contra la renovación poblacional de estas especies (Martínez-Viloria et al, 2011). Considerando que los caladeros donde se ejerce la actividad de pesca en las AMPs se ubican en zonas de poca profundidad (hasta unos 30 m) (DTPA-PNN, 2018), incluso en estuarios y bocanas de ríos donde habitan individuos jóvenes, es muy probable que la actividad de pesca artesanal por si misma esté generando una fuerte presión dentro de las poblaciones al estar concentrando sus capturas sobre tallas pequeñas (Correa-Herrera & Jiménez-Segura, 2012). Sin embargo, Sluka & Sullivan (1998), exponen que la suma de las presiones que enfrentan las especies en el medio marino como el aumento del esfuerzo, la pesca no regulada y los cambios ambientales, son un factor determinante que incide de manera crítica sobre los indicadores y producen cambios en la estructura de las poblaciones de las especies, y como consecuencia el reclutamiento disminuye, generando perdidas genéticas y a su vez que el tamaño de los individuos sea menor.…”