爹地和媽咪對於幼雛索食的反應

Elizabeth A. Krebs 在『行為生態學和社會生物學』裡頭提到
幼雛在巢中的索食狀況與父母的反應，觀察樣本為紅草，蠻有趣的，各位有空可以瞧瞧

以下為該書本段之摘要

Abstract:

Altricial nestlings solicit food by begging and engaging in scramble competition. Solicitation displays can thus signal both hunger and competitive ability. I examined nestling solicitation and parental responses in crimson rosellas (Platycercus elegans), a species in which parents engage in complex patterns of food allocation and appear to control the distribution of food. By manipulating the hunger of individual chicks and entire broods, I assessed how chick behaviours and parental food allocation varied with hatching rank, level of hunger, and intensity of nestling competition. Last-hatched chicks begged more than first-hatched chicks irrespective of individual hunger levels. The two parents combined fed individually hungry chicks more, but mothers and fathers varied in their responses to begging chicks: fathers fed last-hatched chicks in proportion to their begging intensity, whereas mothers fed chicks equally. Since fathers generally allocate more food to first-hatched chicks, fathers appear to use begging rates to adjust food allocation to non-preferred chicks within the brood. When I manipulated brood hunger levels, begging rates increased for first- and last-hatched chicks suggesting that chick begging rates are sensitive to the level of competition. This study shows that begging by rosella chicks does not correlate with hunger in a straightforward way and that the primary patterns of food allocation by parents are not influenced by chick begging. Thus the benefits of increased begging may be limited for nestlings in this species.
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個人心得：

上文裡頭提到，很多種鳥的小BB，在索食上經常會有許多戰略與對策來對付牠們的爹地和媽咪與兄弟姊妹，而小鸚鵡粉可愛喔，大致上，他們索食只有兩種方式，一種是鬼吼鬼叫，一種是擺動牠們的小雞翅
因為戰略和對策對鸚鵡爹地和媽咪通常無用
也就是說鸚鵡爹地和媽咪是公平的溜
只有鸚鵡爹地有時比較『笨』一點，牠們會餵第一隻出生的小鸚鵡多一些，而媽咪會特別注意較小的小BB
而且鸚鵡媽咪是比較公平的，不會因為那隻小鸚鵡插隊滾到前面來，或那隻叫最大聲就特地餵那隻特別多，或小雞翅抖得特別用力就特地餵比較頻繁

基本上這份報告用了許多項作平均分析
爹地和媽咪的鳥性
小鸚鵡的飢餓程度
小鸚鵡的位置
小鸚鵡的索食程度

以上

P.S：上文所提之鸚鵡是紅草