Biología reproductiva y relación peso-longitud de Sciaena deliciosa “lorna” de agosto 2022 a marzo 2023 proveniente de Puerto Salaverry y Puerto Malabrigo, La Libertad, Perú.
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Date
2023
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Universidad Nacional de Trujillo
Abstract
El objetivo principal fue determinar las características de la biología reproductiva y relación peso- longitud de Sciaena deliciosa. Se examinaron 285 individuos provenientes de la pesca artesanal en 2 desembarcaderos de la Región La Libertad, de Agosto 2022 a Marzo 2023. Se obtuvieron datos de peso y longitud total, peso gonadal, estadio de madurez gonadal y sexo. La proporción sexual global se ajustó a la relación 1M: 1H, en todos los meses estudiados. La proporción sexual a talla se ajustó a un modelo polimonial de 3º, el porcentaje de hembras y machos se encuentran en 50% en el rango de tallas de 18, 25, 34 y 35 cm. El IGS muestra que la especie tuvo pulsos reproductivos en las estaciones de primavera – Verano. En las variaciones de madurez sexual para ambos sexos, se encontró una predominancia de estadios IV y V, en los meses de Agosto y de Octubre a Marzo. Se elaboraron las escalas de madurez sexual macroscópica y microscópica, identificándose 6 estadios para ambos sexos. Se calculó la relación longitud peso mediante una regresión potencial en donde se obtuvo un crecimiento cercano a la isometría. El factor de condición de Fulton y Ricker para hembras y machos fue cercanos a 1. Finalmente, considerando su importancia en el sector pesquero, realizar esta investigación permitió conocer el estado actual de la lorna, y recomendar lineamientos de gestión para una explotación sostenible del recurso
The main objective was to determine the characteristics of the reproductive biology and the weight-length relationship of Scieaena deliciosa. A total of 285 individuals from artisanal fisheries at 2 landing sites in the La Libertad region were examined from August 2022 to March 2023. Data were obtained on total weight and length, gonadal weight, gonadal maturity stage and sex. The total sex ratio was adjusted to the ratio 1M: 1H, in all months studied. The sex/length ratio was adjusted to a 3º polymorphic model, the percentage of females and males was 50% in the size range of 18, 25, 34 and 35 cm. The IGS shows that the species had reproductive pulses in the spring-summer seasons. In the variations of sexual maturity for both sexes, a predominance of stages IV and V was found, in the months of August and from October to March. Macroscopic and microscopic sexual maturity scales were elaborated, identifying 6 stages for both sexes. The length-weight relationship was calculated by means of a potential regression where a growth close to isometry was obtained. The Fulton and Ricker condition factor for females and males was close to 1. Finally, considering its importance in the fishing sector, this research allowed us to know the current state of the lorna, and to recommend management guidelines for a sustainable exploitation of the resource.
The main objective was to determine the characteristics of the reproductive biology and the weight-length relationship of Scieaena deliciosa. A total of 285 individuals from artisanal fisheries at 2 landing sites in the La Libertad region were examined from August 2022 to March 2023. Data were obtained on total weight and length, gonadal weight, gonadal maturity stage and sex. The total sex ratio was adjusted to the ratio 1M: 1H, in all months studied. The sex/length ratio was adjusted to a 3º polymorphic model, the percentage of females and males was 50% in the size range of 18, 25, 34 and 35 cm. The IGS shows that the species had reproductive pulses in the spring-summer seasons. In the variations of sexual maturity for both sexes, a predominance of stages IV and V was found, in the months of August and from October to March. Macroscopic and microscopic sexual maturity scales were elaborated, identifying 6 stages for both sexes. The length-weight relationship was calculated by means of a potential regression where a growth close to isometry was obtained. The Fulton and Ricker condition factor for females and males was close to 1. Finally, considering its importance in the fishing sector, this research allowed us to know the current state of the lorna, and to recommend management guidelines for a sustainable exploitation of the resource.
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NATURAL SCIENCES