AGE AND GROWTH OF Poeciliopsis gracilis IN THE AMATE AMARILLO MICRORESERVOIR, MORELOS
AGE AND GROWTH OF Poeciliopsis gracilis IN THE AMATE AMARILLO MICRORESERVOIR, MORELOS
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DOI: https://doi.org/10.22533/at.ed.1594462420054
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Abstract:
The age and growth of Poeciliopsis gracilis were obtained in Amate amarillo microreservoir, Morelos, which is an artificial, shallow, productive system, in which rainwater is collected for later use for irrigation, watering and aquaculture purposes among others. The work was carried out from September 2018 to August 2019, during which 639 organisms were collected. The sex ratio favored females over males throughout the study (M:M; 4.2:1). The length-weight relationship for the population, females and males, showed positive allometric growth, that is, greater growth in weight than in length. Le Cren's relative condition factor (Kr) presented values above 1 throughout the study, indicating that the organisms are in good condition. The age of 365 organisms was determined by reading the circullis of 1090 scales, of which the maximum age recorded was 4 months and the minimum age was 12 days. It was observed that growth marks were deposited every 3 days and the species has a longevity of approximately two years. The values of the asymptotic length (L∞) of the von Bertalanffy growth model for the population, females and males were overestimated. For the Gompertz model, the value of L∞ for the population, females and males was 10.07, 8.48 and 3.89 cm respectively and this better represented the observed data. The aquatic system has warm waters (average 24°C), slightly alkaline (pH > 7.2), well oxygenated (greater than 5 mg L-1), hard waters and highly productive for the growth of organisms
- José Luis Gómez-Márquez
- Aida Victoria Muñoz-Ruiz
- José Luis Guzmán-Santiago
- Roberto Trejo-Albarrán
- María del Carmen Alejo-Plata