Intake of different food sources in the first zoeae stages of Macrobrachium tenellum (Decapoda: Palaemonidae)

Abstract

The objective of this work was to assess the acceptance of live and inert food by Macrobrachium tenellum during the early larval stages. The larvae were obtained by collecting wild ovigerous females in the Ameca River in the State of Jalisco, Mexico. Eight treatments (diets) were used to feed the larvae: D1, control (fasting); D2, micro-pulverized food (Purina®); D3, living, newly hatched nauplii of Artemia franciscana (INVE®, Salt Lake City, Utah, USA); D4, commercial paste containing microalgae (Instant Algae Rotifer Diet®); D5, water extracted from a biofloc system; D6, cooked egg yolk; D7, newly hatched and frozen nauplii of A. franciscana (INVE®, Salt Lake City, Utah, USA); D8, nutritional supplement for shrimp larvae (Epifeed LH1®). Treatments D2, D5, D6 and D8 showed traces of food in the digestive system. The larvae did not consume D3 and D7 treatments. The diets that had more acceptance were micro-pulverized food, a nutritional supplement for shrimp larvae Epifeed® LH1, cooked egg yolk, and biofloc water.

Survival of the prawn Macrobrachium tenellum (Smith, 1871) in confinement with the native fish Dormitator latifrons (Richardson, 1844)

“…In T3 we observed a significantly lesser survival rate in the prawns; as mentioned before, this was probably caused by depredation from the fish, but it's important to not discard cannibalism. Even after not finding statistical differences in the survival for the use of shelter, the state of the art about this topic suggest it's extremely important to provide shelter when shrimps are about the average size of T3 (Ponce-Palafox et al, 2006;Espinosa-Chaurand et al, 2011;Vargas-Ceballos et al, 2020). This study is the first report of polyculture of M. tenellum with the native fish D. latifrons, and assays with other fishes are scarce.…”

“…Macrobrachium tenellum is a tropical species of prawn with gastronomic importance and great market value in Mexico, Guatemala and El Salvador, when is commonly referred as river shrimp (Vargas-Ceballos et al, 2020). This species is found in abundance in natural populations mainly near coastal areas; has a high tolerance to temperature, salinity and dissolved oxygen fluctuation and is not an aggressive species (Espinosa-Chaurand et al, 2011).…”