A Certain Curve of Horn: The Hundred-Year Quest for the by John Frederick Walker

By John Frederick Walker

In a definite Curve of Horn, veteran journalist John Frederick Walker tells the tale of 1 of the main respected and endangered of the regal beasts of Africa: the enormous sable antelope of Angola, an imposing, coal-black quadruped with breathtaking curved horns over 5 toes lengthy. it truly is a captivating and tragic story of exploration and experience, politics and battle, the brutal realities of lifestyles in Africa this day and the sour offerings of conflicting conservation strategies.

A convinced Curve of Horn strains the sable's emergence as a hugely sought-after ordinary heritage prize earlier than the 1st international warfare, and follows its fight to outlive in a conflict area fought over through the troops of part a dozen countries, and its transformation right into a political image and conservation icon. As he follows the path of this mysterious animal, Walker interweaves the tales of the adventurers, scientists, and warriors who've come less than the thrall of the beast, and the way their activities might form the destiny of the large sable antelope and the background of the war-torn country that's its in simple terms domestic.

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And because it is rarely known what phenotypic characteristics the various DNA differences may determine, it is possible that such DNA “evidence” may simply reflect the morphological characteristics on which the original subspecies status was based. Noticeably absent from most new species proposals is whether or not the long-standing prerequisite for species status—that of being a reproductively isolated population—has been met. Can the proposed new species and its close relatives cross-breed and produce viable fertile offspring?

Can the proposed new species and its close relatives cross-breed and produce viable fertile offspring? If so, they are at best subspecies or races and should remain so. ” Given this fact, plus the apparent lack of any universally agreedupon genetic threshold beyond which a new taxon is justified, personal opinion and judgment will probably dominate this area for some time to come. For this book we have adopted the same policy for proposed new taxon acceptance as that for proposed nomenclature changes by attempting to be consistent whenever possible with recently published books that address California amphibians and reptiles and briefly commenting on the opinion(s) that support such changes.

Among all states, California led the way in protecting vanishing species with its passage of this state’s 1970 Endangered Species Act, which prohibited the importation, taking, possession, and sale of endangered and threatened species. An endangered species is one that is in danger of extinction throughout all or a significant part of its range. In this book a federal-listed endangered species is designated by FE and a state-endangered species by SE. A threatened species is one that is likely to become an endangered species throughout all or a significant portion of its range within the foreseeable future.

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