@article{oai:ir.kagoshima-u.ac.jp:00010778,
 author = {中村, 薫},
 journal = {鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University},
 month = {2016-10-31},
 note = {It has been commonly known that the feeding habits of decapods are affected by inevitable
moltings for their developments. In this report, the quantitative methods were applied to
feeding experiments of individual crayfish, Procambarus clarkii, for the purpose to clarify the
relation of feeds to the molting cycle. Some kinds of pellets were prepared, especially such
pellets as containing much cellulose (90%) or oil (14.1%) were used for the examinations of nutritional consideration. Such item as the body weights at different stages on the molting
cycle, the diurnal amount of consumed pellets, and in some cases the amount of feces were weighed. After that, the feed conversion factor of each molting cycle, the amount of consumed pellets during one cycle/ (the body wt. of postmolt-the body wt. of  intermolt), was
calculated. Further, the values of the molting power were introduced here as the indicatives
of the degrees of water absorption at the molting time, which were calculated as (the body wt. of
postmolt-the body wt. of premolt)×100/ the body wt. of premolt.
As results, the diurnal amount of consumed pellets showed a distinct variation following the
lapse of molting stages. Its pattern had the 1st maximum, which is also the greatest value,
at the short postmolt period and the 2nd maxima were recognized in some cases before the
next molting. Such greatest values correspond to the 2-3% of their body weights, and the
summed feeds of the diurnal amounts during one molting cycle occupy about 23% of the body
weight of intermolt. Considering with the experimental results of cellulose feeding, it suggested
that the internal factor(s) of a feed-control mechanism if existed in the crayfish might participate
primarily with the hemolymph concentration(s)of absorbed nutritive(s) rather than the physical factor as the capacity of the digestive tract, that is the stomach and intestinal volume. In
addition, as the pellets of much contained oil gave comparatively a high efficiency to the molting power and the feed conversion factor, it seems that lipid may propose a physiological interest
for the nutritional approach to the molting development., 1. 個別飼育法でペレット飼料を給餌し,アメリカザリガニの日間摂餌量を求め摂食と脱皮成長との関係を調べた。
2. 日間摂餌量は脱皮周期上の位置により著しい変動を示した。そのパターンは脱皮後期に最大値をもつ極大点を示すこと,第2極大期を次回脱皮の前に経る場合もあること,等が明らかにされた。
3. 最大日間摂餌量はその体重の2-3%程に当たること,脱皮の1周期上の積算摂餌量は個体の大きさに関らず脱皮間期体重の約23%を占めることが算出された。
4. セルロース給餌との比較実験の結果,摂食の制御機序には胃の容積と云った機械的要因よりも血リンパの栄養分が第一義的に関与する可能性の高いことが示唆された。
5. 脂質高含有飼料の栄養試験により当該飼料は脱皮周期へは促進的効果を示さないが,脱皮時の吸水作用を高め且つ飼料係数を小さくする働きを窺わせ,脱皮成長に対して効率の
良い飼料になり得る可能性を示した。},
 pages = {225--238},
 title = {ザリガニの脱皮に伴なう摂餌量の変動に関する定量的解析},
 volume = {29},
 year = {}
}