Evolution Illuminated: Salmon and Their Relatives
Evolution Illuminated
Salmon and Their Relatives
$134.99
In Stock,
All photographs are by Andrew Hendry.
) |
) |
) |
| Sockeye salmon ascending Hansen Creek, Lake Aleknagik, Alaska. Salmon in small streams such as these are often subject to intense predation by bears and have evolved smaller body sizes as a result. | Chinook salmon in its ocean-going form. All Pacific salmon species are bright silver in the ocean and only develop their secondary sexual characteristics and breeding coloration after returning to fresh water. | Male sockeye salmon in the crystal clear water of a tributary to Knutson Bay, Iliamna Lake, Alaska. |
) |
) |
) |
| Female sockeye salmon in Hansen Creek, Lake Aleknagik, Alaska. Salmon in small streams such as these are often subject to intense predation by bears and have evolved smaller body sizes as a result. | Sockeye salmon trapped by receding water in a side channel to the Tazimina River, Iliamna Lake, Alaska. | Male sockeye salmon displaying to each other at a beach spawning site in Lake Nerka, Alaska. Male salmon spawning on beaches have deeper bodies than those spawning in streams, a difference that appears to reflect sexual selection favoring deeper bodies in both environments but natural selection favoring shallower bodies in streams. |
) |
) |
) |
| Male and female sockeye salmon spawning on a beach in Iliamna Lake, Alaska. This beach site has very large gravels, which have led to the evolution of larger egg sizes in this population. | Mature sockeye salmon exploring a pond at the head of Pick Creek, Lake Nerka, Alaska. | Sockeye salmon spawning in Pedro Ponds, Iliamna Lake, Alaska. This site has very small gravels, which has led the evolution smaller egg sizes in this population. |
) |
) |
) |
| Sockeye salmon ascending Hansen Creek, Lake Aleknagik, Alaska. Salmon in small streams such as these are often subject to intense predation by bears and have evolved smaller body sizes as a result. | Male Atlantic salmon from the Nivelle River in southern France. | Sockeye salmon captured in a gill net fishery while on its return to spawn in fresh water. |
) |
) |
) |
| Sockeye salmon ascending Hansen Creek, Lake Aleknagik, Alaska. Salmon in small streams such as these are often subject to intense predation by bears and have evolved smaller body sizes as a result. | Male chinook salmon in Kulik Lake, Alaska. | Sockeye salmon spawning in a pond at the head of Hansen Creek, Lake Aleknagik, Alaska. Females compete for territories at spawning sites and males compete for access to females. |
) |
) |
) |
| Arctic charr from Lake Nerka, Alaska. | Sockeye salmon trapped by receding waters in a side channel to the Tazimina River, Iliamna Lake, Alaska. | Chum salmon fry emerging from the gravel in Kennedy Creek Washington. |
) |
) |
) |
| Rainbow trout above the nest of chinook salmon. Rainbow trout and other fishes prey heavily on the eggs laid by spawning salmon. | Chinook salmon spawning in a spring-fed tributary to the Waitaki River, New Zealand. Chinook salmon were introduced to New Zealand in the early 1900s and have shown adaptive divergence in response to natural selection. | Male and female chum salmon from Pick Creek, Lake Nerka, Alaska. |
