Read the full paper: Thyme Essential Oil and Hyaluronic Acid as Natural Disinfectant Alternatives for Broiler Breeder Fertile Eggs: Effects on Eggshell Microbial Load, Embryonic Viability and Hatchability

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ABSTRACT. Egg hatchability in birds is a critical component of individual reproductive success and is associated with eggshell integrity. Contaminants, such as DDT, can influence eggshell thickness an...

Insects can experience a loss of fertility under acute heat stress, but impacts vary among species and depend on life stage and sex. We examined the effects of sublethal heat shocks on the fertility of three mosquito species (Aedes aegypti, Aedes notoscriptus and Culex quinquefasciatus) when males or females were exposed at the pupal and adult stages. Reproductive performance was assessed through egg-laying success, fecundity, egg hatchability and viable offspring production. Female heat shock had limited effects on fertility in all three species, though exposure of adult females to 41 {degrees}C for 1 hr reduced viable offspring production in Ae. notoscriptus. Male heat shock reduced egg hatchability in Cx. quinquefasciatus and viable offspring production in Ae. aegypti depending on the life stage exposed. We investigated several other aspects of heat shock exposure on Ae. aegypti fertility. In this species, male fertility partially recovered within 24-48 hours following heat shock exposure, while effects of heat shocks on female fertility occurred regardless of whether heat exposure occurred pre- or post-mating. In addition, maternal heat shock exposure enhanced offspring fecundity and viable offspring production under subsequent sublethal heat stress. Overall, our findings demonstrate that mosquito fertility is largely robust to short-term heat shocks, but there are also complex trait, sex, stage, temporal and species-specific effects, with implications for predicting mosquito population persistence and species persistence under future climate extremes.

Insects can experience a loss of fertility under acute heat stress, but impacts vary among species and depend on life stage and sex. We examined the effects of sublethal heat shocks on the fertility of three mosquito species (Aedes aegypti, Aedes notoscriptus and Culex quinquefasciatus) when males or females were exposed at the pupal and adult stages. Reproductive performance was assessed through egg-laying success, fecundity, egg hatchability and viable offspring production. Female heat shock had limited effects on fertility in all three species, though exposure of adult females to 41 {degrees}C for 1 hr reduced viable offspring production in Ae. notoscriptus. Male heat shock reduced egg hatchability in Cx. quinquefasciatus and viable offspring production in Ae. aegypti depending on the life stage exposed. We investigated several other aspects of heat shock exposure on Ae. aegypti fertility. In this species, male fertility partially recovered within 24-48 hours following heat shock exposure, while effects of heat shocks on female fertility occurred regardless of whether heat exposure occurred pre- or post-mating. In addition, maternal heat shock exposure enhanced offspring fecundity and viable offspring production under subsequent sublethal heat stress. Overall, our findings demonstrate that mosquito fertility is largely robust to short-term heat shocks, but there are also complex trait, sex, stage, temporal and species-specific effects, with implications for predicting mosquito population persistence and species persistence under future climate extremes.

All signs continue to point to a year-over-year expansion in U.S. chicken production. The USDA says 254.005 million broiler-type eggs were set into incubators, down 500,000 on the week, but up 1% on the year, with average hatchability 79.3% of all eggs. 195.709 million broiler-type chicks were placed into meat production, falling 1.419 million from […]

U.S. broiler chicken numbers continue to rise. The USDA says 256.077 million broiler-type eggs were set into incubation, up 317,000 on the week and 3% on the year. The average rate of hatchability did...

The USDA’s weekly broiler hatchery numbers were mixed. 250.244 million broiler-type eggs were set into incubators, 268,000 less than the previous week, but 1% more than a year ago, with average hatchability...

Cryptocaryon irritans is an obligate parasitic ciliate that significantly endangers marine fish. Hypoxia suppresses the development and hatchability of C. irritans during the tomont stage, which often...

This paper describes a study on the mechanisms of reproductive development in the cotton bollworm (Helicoverpa armigera). Cotton bollworm poses a serious threat to agricultural production as a polyph...

Research showed hatchability could be as low as 60% by 2050.

The 2026 broiler hatchery pace continues to run ahead of 2025, implying a year-to-year rise in chicken production. The USDA says 256.232 million broiler-type eggs were set into incubation, rising 1.994 million on the week and 2% on the year, with average hatchability holding at 79.2%. Placements of broiler-type chicks into incubation were 198.74 million […]

Hatchery numbers continue to imply increased chicken production in 2026. The USDA says 254 million broiler-type eggs were set into incubation, 501,000 less than the previous week, but up 1% from a year ago, with the average rate of hatchability at 79.2%. 198.899 million broiler-type chicks were placed into meat production, rising 480,000 on the […]

Broiler hatchery numbers continue to point towards year-to-year rise in production. The USDA says 256.679 million broiler-type eggs were set into incubation, 166,000 higher than the previous week and 2% more than a year ago, with average hatchability holding just about unchanged. 198.516 million broiler-type chicks were placed into meat production, down 290,000 on the […]

USDA data continues to point towards rising U.S. chicken production. 255.739 million broiler-type eggs were set into incubation last week, down 280,000 from the previous week, but up 2% from a year ago. Average hatchability was 79.3%. 198.455 million broiler-type chicks were placed into meat production, up 1.136 million on the week and 4% on […]

Chicken supplies will likely continue to grow in the coming weeks. The USDA says 255.581 million broiler-type eggs were set into incubators, surging 3.011 million on the week and 2% on the year. Average hatchability was 79.4%. 197.431 million broiler-type chicks were placed into meat production, 492,000 larger than the previous week and 3% above […]

Broiler hatchery numbers were up on the year, continuing to imply bigger chicken production in 2026. The USDA says 252.754 million broiler-type eggs were set into incubators last week, dropping 2.911 million from the previous week, but rising 2% from a year ago, with average hatchability of 79.3%. 196.42 million broiler-type chicks were placed into […]

Broiler numbers were mixed on the week, while holding onto the faster than a year ago pace. The USDA says 253.235 million broiler-type eggs were set into incubators, down 695,000 from the previous week, but up 1% on the year, with average hatchability of 78.5%. 194.897 million broiler-type chicks entered meat production, an increase of […]