The health and welfare of layers under different cage conditions were compared. Three commercial layer farms in Beijing (A, B and C) with stocking densities of 411, 420 and 450 cm², respectively, were examined. The environmental parameters, atmospheric NH₃, CO₂ and H₂S concentrations, were measured ...

This experiment was conducted to evaluate the effects of stocking density on performance, carcass performance, immune organ indexes and meat quality of yellow-feathered broilers. A total of 1 440 twenty-one-day-old Suqin yellow-feathered broilers were randomly placed into 3 groups, 8 (LSD), 16...

To study and determine the key environmental parameter problem areas in the cascading cage-rearing meat duck house in summer, optimize the number and layout of fan operation, and realize precision environment control, a total of 23 measuring points were set in the 96 m (length)×17 m (width)×5.3 m...

An experiment was conducted to evaluate the effect of stocking density on growth performance, carcass yield, and immune status of a local chicken breed. In total, 840 one-day-old male Suqin yellow chickens were placed into 4-m² cages in groups of 50 (low), 70 (medium), or 90 (high) birds. Each...

The impacts of stocking density (5, 10, 15, 20, and 30 ind./ml) and alga species on larval growth, survival and metamorphosis were investigated in surf clam Mactra veneriformis at 22.8-24.6°C, salinity 24-25, and pH 7.82-8.36 from June to August in 2008. The results showed that the larvae had...

This paper summarizes the environmental stress factors that affect the physiological regulation of stress during the live transportation of aquatic animals, including tissue hypoxia stress, acid-base and ammonia stress, salt concentration and temperature stress, and density stress. Meanwhile, it...

African catfish (30.71±0.89 g) were stocked at four different densities of 35, 65, 95 and 125 kg m^-3 in 120 L aerated tanks for 60 days, with one and a half tanks of water being renewed daily. The effects of stocking density were examined in growth performance and welfare indicators, such as...

This study was conducted to enhance the viability and alleviate the oxidative stress response using MO for sea bass during live transport. Six experimental groups were designed, and the effects of the physiological responses of MO were evaluated in comparison with MS-222 and eugenol. The...

The yellowtail clownfish (Amphiprion clarkii) is a hermaphrodite fish, whose sex differentiation and gonad development are closely related to its social status. The kisspeptin/KissR system is regarded as a key factor mediating social stress on reproductive regulation. In order to understand the...

Background: The Amur tiger (Panthera tigris altaica) is the largest and one of the most endangered cats in the world. In wild and captive cats, communication is mainly dependent on olfaction. However, vocal communication also plays a key role between mother and cubs during the breeding period. How...