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North Atlantic haddock use magnetic compass to guide them（图）
North Atlantic haddock magnetic compass guide
2019/10/18
A new study has found that the larvae of haddock, a commercially important type of cod, have a magnetic compass to find their way at sea. Haddock larvae orient toward the northwest using Earth's magne...
Reproductive maturation and diel reproductive periodicity in western Gulf of Maine haddock
haddock Gulf of Maine diel reprodutcive periodicity reproductive maturation final oocyte maturation maturity index
2014/12/11
A new macroscopic ovarian reproductive maturity index for haddock, Melanogrammus aeglefinus L, was developed to improve field collection of reproductive stage data. The index was tested, validated and...
Differential Egg Mortality of Georges Bank Cod and Haddock Inferred from Two Independent Estimates of Seasonal Egg Production
Atlantic cod egg mortality Georges Bank haddock spawning pattern
2008/10/21
Georges Bank Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) stocks have undergone significant changes over the last 40 years with the reduction of older spawners and increased in...
Bernfeld-Haddock猜想的推广形式及其证明
Bernfeld--Haddock猜想 时滞微分方程 收敛性
2007/12/10
本文研究一类时滞微分方程解的收敛性,这类方程是Bernfeld 和Haddock所提出的关于一个非线性时滞微分方程的每个解收敛于常数的一个猜想中的方程的推广形式,并具有重要的实际应用背景.我们首先给出例子说明几篇现有文献关于此类方程及其它的几种推广形式的解的收敛性证明中存在的错误.然后,我们对这类方程解的收敛性在更弱的条件下给出了一个新的论证,修正并改进了已有的相应结论,也肯定了Bernfeld ...