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suggest 1. species concepts that are consistent with the view that the yellow-legged gull L. michahellis represent a separate species; and (note: researchers use multiple lines of evidence to support a conclusion.) 2. a species concept that does NOT support that view (i.e., that supports the historical one- species classification). For each species concept, explain your reasoning in 1 or 2 sentences. Figures of the two bird species are posted in a sperate file on eClass.

suggest 1. species concepts that are consistent with the view that the yellow-legged gull L. michahellis represent a separate species; and (note: researchers use multiple lines of evidence to support a conclusion.) 2. a species concept that does NOT support that view (i.e., that supports the historical one- species classification). For each species concept, explain your reasoning in 1 or 2 sentences. Figures of the two bird species are posted in a sperate file on eClass.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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The yellow-legged gull (Larus michahellis) is a widespread species along the Atlantic coasts of France and the Iberian Peninsula, the Azores Islands, Madeira, the countries of the Mediterranean basin and the Black Sea. It was formerly considered as a subspecies of Herring Gull (L. argentatus), with which it coexists in some reproductive areas. Only recently L. michahellis has been recognized as a distinct species. Following detailed comparison of the two species, researchers found that the L. michahellis's restricted but dense head-streaking and advanced primary molt in late summer, are not compatible with L. argentatus. Larus michahellis has a proportionately longer, heavier bill and bulkier head and body than L. urgentutus. In addition, L. michahellis's yellow bill has a red gonydeal spot, both colors typically brighter than in L. urgentutus outside breeding season. They also have an orange-red to vermilion orbital ring and yellow legs. DNA research, however, suggests that the yellow-legged gull L. michahellis is actually closest to the great black-backed gull L. marinus and the Armenian gull L. armenicus comparing with L. urgentutus. Therefore, researchers concluded that these similar-looking yellow-legged gull should be recognized as a separate species. Based only on the evidence described above, suggest 1. species concepts that are consistent with the view that the yellow-legged gull L. michahellis represent a separate species; and (note: researchers use multiple lines of evidence to support a conclusion.) 2. a species concept that does NOT support that view (i.e., that supports the historical one- species classification). For each species concept, explain your reasoning in 1 or 2 sentences. Figures of the two bird species are posted in a sperate file on eClass.
Transcribed Image Text:The yellow-legged gull (Larus michahellis) is a widespread species along the Atlantic coasts of France and the Iberian Peninsula, the Azores Islands, Madeira, the countries of the Mediterranean basin and the Black Sea. It was formerly considered as a subspecies of Herring Gull (L. argentatus), with which it coexists in some reproductive areas. Only recently L. michahellis has been recognized as a distinct species. Following detailed comparison of the two species, researchers found that the L. michahellis's restricted but dense head-streaking and advanced primary molt in late summer, are not compatible with L. argentatus. Larus michahellis has a proportionately longer, heavier bill and bulkier head and body than L. urgentutus. In addition, L. michahellis's yellow bill has a red gonydeal spot, both colors typically brighter than in L. urgentutus outside breeding season. They also have an orange-red to vermilion orbital ring and yellow legs. DNA research, however, suggests that the yellow-legged gull L. michahellis is actually closest to the great black-backed gull L. marinus and the Armenian gull L. armenicus comparing with L. urgentutus. Therefore, researchers concluded that these similar-looking yellow-legged gull should be recognized as a separate species. Based only on the evidence described above, suggest 1. species concepts that are consistent with the view that the yellow-legged gull L. michahellis represent a separate species; and (note: researchers use multiple lines of evidence to support a conclusion.) 2. a species concept that does NOT support that view (i.e., that supports the historical one- species classification). For each species concept, explain your reasoning in 1 or 2 sentences. Figures of the two bird species are posted in a sperate file on eClass.
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