Editing Little penguin (section)

===Prey availability===
Rising ocean temperatures have seen a trend towards earlier onset of breeding in '' Eudyptula minor'' which does not always align with the availability of their prey. This is because higher sea surface temperatures are associated with early onset of nesting, but also associated with lower nutrients and oxygen availability.<ref name="Dann"/> During the breeding season, parents are restricted to a short foraging area close to their nest and are therefore vulnerable to small regional changes.<ref>(Cullen, J. M., Chambers, L. E., Coutin, P. C., & Dann, P. (2009). Predicting onset and success of breeding in little penguins Eudyptula minor from ocean temperatures. Marine Ecology Progress Series, 378, 269–278.)</ref> La Niña events increasing the sea surface temperature along the New Zealand coastline cause prey such as schooling fish and krill to either become more regionally scarce or migrate to new habitats.<ref name="Flemming"/> Graham's Gudgeon once dominated the diet of the Oamaru colony of ''Eudyptula minor'', however in 1995 the availability of the species dropped from 20% in December to 0% in January the following year. Penguins were able to successfully adapt their diet to consist of [[slender sprat]] and [[Lagodon|pigfish]].<ref name ="Agnew">Agnew, P., Lalas, C., Wright, J., & Dawson, S. (2015). Variation in breeding success and survival of little penguins Eudyptula minor in response to environmental variation. Marine Ecology Progress Series, 541, 219–229.</ref>