Irish weather experts are predicting the high-pressure conditions to continue right up until next weekend. Temperatures peak on Saturday, when the mercury is expected to shoot up to 21C, according to Met Eireann.The forecaster said: “Saturday will be dry and warm in most areas with sunny spells. “In the northwest, it will be cloudier with rain developing later in the day.“Maximum temperatures 16 to 21C, warmest in the east and south.“Winds mostly moderate southwesterly, but fresh to strong in Connacht and Ulster.”However, there is the possibility of rain. “Mostly cloudy, with scattered outbreaks of rain and drizzle, persistent in places on Sunday.“However, there will be good dry periods in the south and southeast and somewhat clearer conditions will develop in the north, extending slowly southwards later Sunday and Sunday night.“Relatively cool in most areas on Sunday, with maximum temperatures of 14 to 16C, but it will be mild and humid in the south and southeast, with temperatures of 17 to 20C.“Winds will be mostly light, westerly.“Sunday night will be mainly dry, with just a few spots of light rain or drizzle at first, mainly in parts of the south. “Mist and fog patches will form in light winds. Min. 5 to 9C generally, but milder in the south.”Sunny spells with scattered showers for Donegal this weekend was last modified: September 14th, 2019 by Staff WriterShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window)
Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin
Understanding the mechanisms that link prey availability to predator behaviour and population change is central to projecting how a species may respond to future environmental pressures. We documented the behavioural responses and breeding investment of macaroni penguins Eudyptes chrysolophus across five breeding seasons where local prey density changed by five-fold; from very low to highly abundant. When prey availability was low, foraging trips were significantly longer and extended overnight. Birds also foraged farther from the colony, potentially in order to reach more distant foraging grounds and allow for increased search times. These extended foraging trips were also linked to a marked decrease in fledgling weights, most likely associated with reduced rates of provisioning. Furthermore, by comparing our results with previous work on this population, it appears that lowered first-year survival rates associated, at least partially, with fledging masses were also evident for this cohort. This study integrates a unique set of prey density, predator behaviour and predator breeding investment data to highlight a possible behavioural mechanism linking perturbations in prey availability to population demography.