By John Frederick Walker
In a undeniable 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 large sable antelope of Angola, an imposing, coal-black quadruped with breathtaking curved horns over 5 ft lengthy. it's a captivating and tragic story of exploration and experience, politics and struggle, the brutal realities of existence in Africa this present day and the sour offerings of conflicting conservation strategies.
A yes Curve of Horn strains the sable's emergence as a hugely sought-after common heritage prize prior to the 1st global struggle, and follows its fight to outlive in a struggle region fought over by means of the troops of part a dozen international locations, 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 lower than the thrall of the beast, and the way their activities could form the destiny of the enormous sable antelope and the heritage of the war-torn state that's its basically domestic.
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Extra resources for A Certain Curve of Horn: The Hundred-Year Quest for the Giant Sable Antelope of Angola
Interpretation of the species-aggregated CPUE as an index of community biomass rests on the assumption that catchability (a coefficient specifying the proportionality between CPUE and abundance) is constant across species and over time. The former is unrealistic because, among other things, the species have different depth distributions and hence different vulnerability to longline gear2. The evolution of tuna longline fisheries in all oceans3 has seen changes in fishing strategies (and hence catchability) as different species have been targeted.
1e). Moreover, under constant darkness mns flies maintained a rhythmic modulation of locomotor activity with a period of ,24 h (Fig. 1f; see also Supplementary Fig. 1 for activity profiles of individual flies). Thus, the mns mutation affects the amount but not the circadian regulation of sleep. We next examined the response of mns flies to sleep deprivation. When sleep deprived, wild-type flies show an increase in sleep duration and intensity, just as mammals do30, suggesting that sleep serves some function that is homeostatically regulated2.
Oceanogr. 11, 143–155 (2002). 5. Hampton, J. & Fournier, D. Mar. Freshwat. Res. 52, 937–963 (2001). 6. Maunder, M. N. & Watters, G. Inter-Am. Trop. Tuna Comm. Bull. 23, 433–582 (2003). 7. Hampton, J. & Kleiber, P. Stock Assessment of Yellowfin Tuna in the Western and Central Pacific Ocean (16th Meeting of the Standing Committee on Tuna and Billfish, Secretariat of the Pacific Community, Noumea, New Caledonia, 2003). pdf 8. , Kurota, H. & Maunder, M. N. Stock Assessment of Bigeye Tuna in the Western and Central Pacific Ocean, with Comparisons to the Entire Pacific Ocean (16th Meeting of the Standing Committee on Tuna and Billfish, Secretariat of the Pacific Community, Noumea, New Caledonia, 2003).
A Certain Curve of Horn: The Hundred-Year Quest for the Giant Sable Antelope of Angola by John Frederick Walker