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Residency of the scalloped hammerhead shark (Sphyrna lewini) at Malpelo Island and evidence of migration to other islands in the Eastern Tropical Pacific
Sixty nine hammerhead sharks, Sphyrna lewini, were tagged at Malpelo Island (Colombia) with ultrasonic transmitters during March 2006, 2007 and 2008, as part of a study to understand their residency at the island and their horizontal and vertical movements. Five sharks visited Cocos Island, 627 km d...
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| Published in: | Environmental biology of fishes 2011-06, Vol.91 (2), p.165-176 |
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| Main Authors: | , , , , , |
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| cites | cdi_FETCH-LOGICAL-c459t-17bb5155a3ba031d02d7e34458f6bc946c9c6719f1a4a61312d3111dad4a2e913 |
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| container_title | Environmental biology of fishes |
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| creator | Bessudo, Sandra Soler, German Andres Klimley, A. Peter Ketchum, James T. Hearn, Alex Arauz, Randall |
| description | Sixty nine hammerhead sharks,
Sphyrna lewini,
were tagged at Malpelo Island (Colombia) with ultrasonic transmitters during March 2006, 2007 and 2008, as part of a study to understand their residency at the island and their horizontal and vertical movements. Five sharks visited Cocos Island, 627 km distant from Malpelo. One of the sharks that appeared at Cocos Island also visited the Galapagos Islands, 710 km from Cocos, a month later. There is connectivity of
Sphyrna lewini
between Malpelo, Cocos and the Galapagos Islands, but the frequency of movements between the islands appears to be relatively low ( |
| doi_str_mv | 10.1007/s10641-011-9769-3 |
| format | article |
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Sphyrna lewini,
were tagged at Malpelo Island (Colombia) with ultrasonic transmitters during March 2006, 2007 and 2008, as part of a study to understand their residency at the island and their horizontal and vertical movements. Five sharks visited Cocos Island, 627 km distant from Malpelo. One of the sharks that appeared at Cocos Island also visited the Galapagos Islands, 710 km from Cocos, a month later. There is connectivity of
Sphyrna lewini
between Malpelo, Cocos and the Galapagos Islands, but the frequency of movements between the islands appears to be relatively low (<7% of the tagged sharks). The most common depth at which the sharks swam coincided with the thermocline (
rs
= 0.72,
p
< 0.01). The depth of the thermocline varied depending on the time of the year. Nocturnal detections of the sharks were more frequent during the cold season than during the warm season (W = 60,
p
< 0.01). We also found that hammerheads spent significantly more time on the up-current side of the island (Kruskal-Wallis = 31.1008;
p
< 0.01). This study contributes to the knowledge of hammerhead sharks not only in Malpelo Island but also at a regional level in the Eastern Tropical Pacific.</description><identifier>ISSN: 0378-1909</identifier><identifier>EISSN: 1573-5133</identifier><identifier>DOI: 10.1007/s10641-011-9769-3</identifier><identifier>CODEN: EBFID3</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Agnatha. Pisces ; Animal and plant ecology ; Animal Systematics/Taxonomy/Biogeography ; Animal, plant and microbial ecology ; Animals ; Autoecology ; Biological and medical sciences ; Biomedical and Life Sciences ; Cold season ; Environment ; Freshwater & Marine Ecology ; Fundamental and applied biological sciences. Psychology ; Islands ; Life Sciences ; Nature Conservation ; Sea water ecosystems ; Sharks ; Synecology ; Tagging ; Thermocline ; Vertebrata ; Zoology</subject><ispartof>Environmental biology of fishes, 2011-06, Vol.91 (2), p.165-176</ispartof><rights>Springer Science+Business Media B.V. 2011</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c459t-17bb5155a3ba031d02d7e34458f6bc946c9c6719f1a4a61312d3111dad4a2e913</citedby><cites>FETCH-LOGICAL-c459t-17bb5155a3ba031d02d7e34458f6bc946c9c6719f1a4a61312d3111dad4a2e913</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24208868$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Bessudo, Sandra</creatorcontrib><creatorcontrib>Soler, German Andres</creatorcontrib><creatorcontrib>Klimley, A. Peter</creatorcontrib><creatorcontrib>Ketchum, James T.</creatorcontrib><creatorcontrib>Hearn, Alex</creatorcontrib><creatorcontrib>Arauz, Randall</creatorcontrib><title>Residency of the scalloped hammerhead shark (Sphyrna lewini) at Malpelo Island and evidence of migration to other islands in the Eastern Tropical Pacific</title><title>Environmental biology of fishes</title><addtitle>Environ Biol Fish</addtitle><description>Sixty nine hammerhead sharks,
Sphyrna lewini,
were tagged at Malpelo Island (Colombia) with ultrasonic transmitters during March 2006, 2007 and 2008, as part of a study to understand their residency at the island and their horizontal and vertical movements. Five sharks visited Cocos Island, 627 km distant from Malpelo. One of the sharks that appeared at Cocos Island also visited the Galapagos Islands, 710 km from Cocos, a month later. There is connectivity of
Sphyrna lewini
between Malpelo, Cocos and the Galapagos Islands, but the frequency of movements between the islands appears to be relatively low (<7% of the tagged sharks). The most common depth at which the sharks swam coincided with the thermocline (
rs
= 0.72,
p
< 0.01). The depth of the thermocline varied depending on the time of the year. Nocturnal detections of the sharks were more frequent during the cold season than during the warm season (W = 60,
p
< 0.01). We also found that hammerheads spent significantly more time on the up-current side of the island (Kruskal-Wallis = 31.1008;
p
< 0.01). This study contributes to the knowledge of hammerhead sharks not only in Malpelo Island but also at a regional level in the Eastern Tropical Pacific.</description><subject>Agnatha. Pisces</subject><subject>Animal and plant ecology</subject><subject>Animal Systematics/Taxonomy/Biogeography</subject><subject>Animal, plant and microbial ecology</subject><subject>Animals</subject><subject>Autoecology</subject><subject>Biological and medical sciences</subject><subject>Biomedical and Life Sciences</subject><subject>Cold season</subject><subject>Environment</subject><subject>Freshwater & Marine Ecology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Islands</subject><subject>Life Sciences</subject><subject>Nature Conservation</subject><subject>Sea water ecosystems</subject><subject>Sharks</subject><subject>Synecology</subject><subject>Tagging</subject><subject>Thermocline</subject><subject>Vertebrata</subject><subject>Zoology</subject><issn>0378-1909</issn><issn>1573-5133</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp1kc9u1DAQh60KJJbCA3CzKiHRQ4ontuP4iKr-k1oVQTlbs7bTuGTtYKet9lF4W5LdCk4crDn4m2_s-RHyAdgJMKY-F2CNgIoBVFo1uuIHZAVS8UoC56_IinHVVqCZfkPelvLAGNNKqBX5_c2X4Hy0W5o6OvWeFovDkEbvaI-bjc-9R0dLj_kn_fR97Lc5Ih38c4jhmOJEb3AY_ZDoVRkwOroc_7Qz-sW4CfcZp5AinRJNsz_TsCMLDXE37wzL5HOkdzmNYZ5Nv6INXbDvyOsOh-Lfv9RD8uP87O70srq-vbg6_XJdWSH1VIFaryVIiXyNjINjtVOeCyHbrllbLRqrbaNAd4ACG-BQOw4ADp3A2mvgh-Ro7x1z-vXoy2Qe0uP8yaGYtlFKSl6LGYI9ZHMqJfvOjDlsMG8NMLMEYPYBmDkAswRg-Nzz8UWMy067jNGG8rexFjVr26aduXrPlfkq3vv87wH_l_8B8RCWuQ</recordid><startdate>20110601</startdate><enddate>20110601</enddate><creator>Bessudo, Sandra</creator><creator>Soler, German Andres</creator><creator>Klimley, A. 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Peter ; Ketchum, James T. ; Hearn, Alex ; Arauz, Randall</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c459t-17bb5155a3ba031d02d7e34458f6bc946c9c6719f1a4a61312d3111dad4a2e913</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Agnatha. Pisces</topic><topic>Animal and plant ecology</topic><topic>Animal Systematics/Taxonomy/Biogeography</topic><topic>Animal, plant and microbial ecology</topic><topic>Animals</topic><topic>Autoecology</topic><topic>Biological and medical sciences</topic><topic>Biomedical and Life Sciences</topic><topic>Cold season</topic><topic>Environment</topic><topic>Freshwater & Marine Ecology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Islands</topic><topic>Life Sciences</topic><topic>Nature Conservation</topic><topic>Sea water ecosystems</topic><topic>Sharks</topic><topic>Synecology</topic><topic>Tagging</topic><topic>Thermocline</topic><topic>Vertebrata</topic><topic>Zoology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bessudo, Sandra</creatorcontrib><creatorcontrib>Soler, German Andres</creatorcontrib><creatorcontrib>Klimley, A. 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Peter</au><au>Ketchum, James T.</au><au>Hearn, Alex</au><au>Arauz, Randall</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Residency of the scalloped hammerhead shark (Sphyrna lewini) at Malpelo Island and evidence of migration to other islands in the Eastern Tropical Pacific</atitle><jtitle>Environmental biology of fishes</jtitle><stitle>Environ Biol Fish</stitle><date>2011-06-01</date><risdate>2011</risdate><volume>91</volume><issue>2</issue><spage>165</spage><epage>176</epage><pages>165-176</pages><issn>0378-1909</issn><eissn>1573-5133</eissn><coden>EBFID3</coden><abstract>Sixty nine hammerhead sharks,
Sphyrna lewini,
were tagged at Malpelo Island (Colombia) with ultrasonic transmitters during March 2006, 2007 and 2008, as part of a study to understand their residency at the island and their horizontal and vertical movements. Five sharks visited Cocos Island, 627 km distant from Malpelo. One of the sharks that appeared at Cocos Island also visited the Galapagos Islands, 710 km from Cocos, a month later. There is connectivity of
Sphyrna lewini
between Malpelo, Cocos and the Galapagos Islands, but the frequency of movements between the islands appears to be relatively low (<7% of the tagged sharks). The most common depth at which the sharks swam coincided with the thermocline (
rs
= 0.72,
p
< 0.01). The depth of the thermocline varied depending on the time of the year. Nocturnal detections of the sharks were more frequent during the cold season than during the warm season (W = 60,
p
< 0.01). We also found that hammerheads spent significantly more time on the up-current side of the island (Kruskal-Wallis = 31.1008;
p
< 0.01). This study contributes to the knowledge of hammerhead sharks not only in Malpelo Island but also at a regional level in the Eastern Tropical Pacific.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10641-011-9769-3</doi><tpages>12</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Environmental biology of fishes, 2011-06, Vol.91 (2), p.165-176 |
| issn | 0378-1909 1573-5133 |
| language | eng |
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| source | Springer Link |
| subjects | Agnatha. Pisces Animal and plant ecology Animal Systematics/Taxonomy/Biogeography Animal, plant and microbial ecology Animals Autoecology Biological and medical sciences Biomedical and Life Sciences Cold season Environment Freshwater & Marine Ecology Fundamental and applied biological sciences. Psychology Islands Life Sciences Nature Conservation Sea water ecosystems Sharks Synecology Tagging Thermocline Vertebrata Zoology |
| title | Residency of the scalloped hammerhead shark (Sphyrna lewini) at Malpelo Island and evidence of migration to other islands in the Eastern Tropical Pacific |
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