Email this article (Login required)
Email the author (Login required) Distribution, abundance, growth, and survival of juveniles of Penaeus (Farfantepenaeus) aztecus in Laguna Larga, in the southwest of the Gulf of Mexico
Submited: 2025-09-26 22:02:45 | Published: 2026-06-30 22:44:54
DOI: https://doi.org/10.3856/vol54-issue3-fulltext-3539
Abstract
The present study aimed to evaluate the distribution, abundance, growth, and survival of juvenile of the brown shrimp Penaeus (Farfantepenaeus) aztecus Ives, 1891 in Laguna Larga. The shrimps were collected by trawling on submerged vegetation with a Renfro-type net. Juveniles were fixed in 96% alcohol and transported to the laboratory, where they were measured and weighed. Temperature, salinity, dissolved oxygen, total dissolved solids, and pH were measured in situ. The highest values were as follows: dissolved oxygen 6.23 ± 0.45 mg L-1, pH 8.17 ± 0.09, temperature 30.79 ± 1.51°C, dissolved solids 87.43 ± 11.20 ppt, and salinity of 32.78 ± 1.43. A total of 1,739 juveniles were collected, with the highest number in August. Four to six age classes were obtained. The bent-line and Gompertz models provided the best fit to the growth data. The maximum length evaluated for juveniles was 65.79 ± 0.71 mm. The model of relationship temperature growth rate was 3.2 to 4.4 mm week-1. Growth patterns were positively allometric. Survival rate was 13.71%. According to the generalized linear model analysis, pH, temperature, and salinity were significantly related to species abundance across sampling months. The body growth rates of juveniles of this species were closely related to rising water temperatures. The highest mortality rates and, consequently, the lowest survival rates were observed in June and August, establishing a trade-off with growth, as these months saw a high rate of size increase.
