slugBehavior activities of Macrobrachium rosenbergii (De Man, 1879) in monosex and mixed populations, in the laboratory
Journal Title: Journal of Animal Behaviour and Biometeorology - Year 2018, Vol 6, Issue 2
Abstract
Monosex all-male populations for the commercial breeding of the freshwater prawn Macrobrachium rosenbergii have been used to lessen the specimens´ aggressiveness and size heterogeneousness. The species´s behavioral variation in mixed, monosex all-male and monosex all-female populations, during the 24-h light-dark period, is assessed. The focal method, with instantaneous report, was employed, featuring a 15-m window for each aquarium, distributed in 12 time shifts throughout the light-dark phase. Eight aquariums contained four prawns each (10 prawns/m2), totaling 96 prawns, monitored for 160 h, during 30 days. Exploring, burrowing, covering with earth, feeding, cleaning, inactivity, crawling, swimming, change and agonistic activity were analyzed. The animals showed a high rate of autogrooming and exploitation during the light and dark phases in three culture modalities, whereas burrowing occurred more frequently during the light period. Agonism was more frequent during the dark phase in all populations, although rates of monosex all-female culture were higher during the light and dark phases when compared to mixed and monosex all-male cultures. The authors recommend shelters and substrates for protection and improvement of the animals´ welfare, especially during the dark shift. Since agonism was more frequent for monosex all-female culture when compared to that in mixed or monosex all-male culture, such population composition is not recommended.
Authors and Affiliations
Daniele Bezerra dos Santos ▪ Lúcia Maria de Almeida ▪ Emerson Eduardo Silva de Moura ▪ Maria de Fátima Arruda ▪ Cibele Soares Pontes
slugGoats and sheep adapted to the tropics
This review aimed to discuss the relevant aspects concerning the evaluation of the adaptability of goats and sheep in tropics. Based on the results, the best breeds of goats and sheep adaptaded to the tropics, and mor...
slugGas emission in the poultry production
Among the greenhouse gases produced in broiler chicken production environments, ammonia stands out for being present in higher concentrations and for significantly affecting human and animal health. Thus, this review...
slugDetermination of physiological parameters and thermal gradients of Anglo-nubian goatling in Brazilian semiarid
The aim of this research was to evaluate the thermal gradients of Anglo nubian goatling fed artificially and maintained under the same environmental conditions in semiarid. Were used 22 goatling aged 90 days and in th...
slugThermal environment in growing and finishing pig facilities of different building typologies
The objective of this study was to evaluate the thermal comfort of growing and finishing pigs affected by the different constructive typologies of the installations regarding the floor and lateral partitions. Were eva...
slugDoes the blindness affect the behavioural activities of rabbit?
Blindness is a condition characterized by the limited or complete loss of a rabbit's eyesight. Rare is known about its effect on behavioural activities of rabbit. The aim of this study was to investigate the effect of...