EFFECTS OF THREE KINDS OF SUGAR SYRUPS ON COLONY DEVELOPMENT OF BUMBLE BEE (BOMBUS TERRESTRIS L.)

摘要

Przetestowano wp?yw podkarmiania trzema rodzajami syropów na rozwój rodzin trzmiela Bombus terrestris dalmatinus, wyprowadzonych od 60 matek. Rodziny podzielono losowo na trzy grupy i karmiono: syropem kukurydzianym o wysokiej zawarto?ci fruktozy (HFCS - 42-45% fruktozy, 50-54% glukozy), syropem sacharozowym (SS - 99% sacharozy) oraz przemys?owym syropem dla pszczó? (BFSS - 37-40% fruktozy, 27-30% glukozy, 30-36% sacharozy). Rodziny karmione by?y równie? takim samym ?wie?ym py?kiem i utrzymywane w standardowych warunkach laboratoryjnych (temperatura: 28±1℃, wilgotno?? wzgl?dna: 60±5%). Rodziny by?y karmione do woli py?kiem oraz syropami (stosunek wody do cukru wynosi? w przybli?eniu 1:1). W czasie okresowych obserwacji rodzin odnotowano parametry rozwoju ka?dej z nich. Zmierzono tak?e tygodniowe spo?ycie syropu, ca?kowite spo?ycie syropu oraz ca?kowite spo?ycie py?ku przez ka?d? z rodzin. Najwy?sze wspó?czynniki: sk?adania jaj, wyprowadzania robotnic i osi?gania wielko?ci handlowej (odpowiednio 90, 75 i 50%) stwierdzono w grupie rodzin podkarmianych BFSS. Jednak bior?c pod uwag? zbadane parametry rodziny nie stwierdzono istotnych ró?nic mi?dzy grupami karmionymi ró?nymi rodzajami syropów. Do momentu osi?gni?cia wielko?ci handlowej (50-60 robotnic) spo?ycie syropu na rodzin? waha?o si? od 461 do 546 ml, a py?ku - od 164 do 190 g.%The effects of three kinds of sugar syrups on colony development were studied. Weekly sugar syrup consumption of the Bombus terrestris dalmatinus colonies were investigated. A total of 60 queens were separately placed in standard nest boxes and randomly divided into three groups. We tested high fructose com syrup (HFCS - fructose 42-45%, glucose 50-54%), sucrose syrup (SS - sucrose 99%), and industrial bee feeding sugar syrup (BFSS - fructose 37-40%, glucose 27-30%, sucrose 30-36%). All queens and colonies were fed with the same fresh pollen and reared under standard laboratory conditions (28 ± 1℃, 60 ± 5% RH). Pollen and sugar syrups (approximately 1:1 watensugar) were provided ad libitum. Colony development traits, weekly syrup consumption, total syrup consumption, and total pollen consumption of each colony were recorded during periodic observations. The highest egg laying rate, colony production rate and saleable colony production rate (90, 75, and 50%, respectively) were found in the BFSS treatment. However, no significant difference was found among treatments in terms of examined colony characteristics. Until the colonies were large enough for sale (50-60 workers), the consumption of sugar syrup and pollen per one colony varied from 461 to 546 ml and from 164 to 190 g, respectively.