Geographic variation in at-sea movements, habitat use and diving behaviour of female Cape fur seals
Knowledge of animal foraging behaviour has implications for management and conservation. While Cape fur seals Arctocephalus pusillus pusillus comprise a major proportion of the southern African marine predator biomass, little is known about their at-sea movements. We investigated foraging distributi...
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| Veröffentlicht in: | Marine ecology. Progress series (Halstenbek) 2020-09, Vol.649, p.201-218 |
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| creator | Botha, J. A. Kirkman, S. P. Arnould, J. P. Y. Lombard, A. T. Hofmeyr, G. J. G. Meÿer, M. A. Kotze, P. G. H. Pistorius, P. A. |
| description | Knowledge of animal foraging behaviour has implications for management and conservation. While Cape fur seals Arctocephalus pusillus pusillus comprise a major proportion of the southern African marine predator biomass, little is known about their at-sea movements. We investigated foraging distribution, habitat use and diving behaviour for 35 adult female Cape fur seals from 3 breeding colonies experiencing contrasting oceanographic regimes. Animals from Black Rocks, the smallest and eastern-most colony, undertook shorter foraging trips and utilised shallower waters over the shelf. In comparison, animals from the larger west coast colonies, at Kleinsee and False Bay, travelled further and utilised deeper shelf and shelf-slope waters. However, across colonies, females typically preferred depths of |
| doi_str_mv | 10.3354/meps13446 |
| format | Article |
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A. ; Kirkman, S. P. ; Arnould, J. P. Y. ; Lombard, A. T. ; Hofmeyr, G. J. G. ; Meÿer, M. A. ; Kotze, P. G. H. ; Pistorius, P. A.</creator><creatorcontrib>Botha, J. A. ; Kirkman, S. P. ; Arnould, J. P. Y. ; Lombard, A. T. ; Hofmeyr, G. J. G. ; Meÿer, M. A. ; Kotze, P. G. H. ; Pistorius, P. A.</creatorcontrib><description>Knowledge of animal foraging behaviour has implications for management and conservation. While Cape fur seals Arctocephalus pusillus pusillus comprise a major proportion of the southern African marine predator biomass, little is known about their at-sea movements. We investigated foraging distribution, habitat use and diving behaviour for 35 adult female Cape fur seals from 3 breeding colonies experiencing contrasting oceanographic regimes. Animals from Black Rocks, the smallest and eastern-most colony, undertook shorter foraging trips and utilised shallower waters over the shelf. In comparison, animals from the larger west coast colonies, at Kleinsee and False Bay, travelled further and utilised deeper shelf and shelf-slope waters. However, across colonies, females typically preferred depths of <500 m and slopes of <5°. Kleinsee and False Bay seals selected sea surface temperatures within the range typically preferred by pelagic prey species such as round herring, sardine and anchovy (14−19°C). Black Rocks individuals showed bimodal preferences for colder (16°C) and warmer waters (>22°C). Dive behaviour was similar between Kleinsee and False Bay individuals (unavailable from Black Rocks), with both pelagic and benthic foraging evident. Diel patterns were apparent at both sites, as dive depth and benthic diving increased significantly during daylight hours, likely reflecting vertical movements of prey species. We provide the first assessment of Cape fur seal movement behaviour for the South African component of the population. Observed geographic differences likely reflect the availability of suitable habitat but may also indicate differences in foraging strategies and densitydependent effects throughout the range of this species.</description><identifier>ISSN: 0171-8630</identifier><identifier>EISSN: 1616-1599</identifier><identifier>DOI: 10.3354/meps13446</identifier><language>eng</language><publisher>Oldendorf: Inter-Research Science Center</publisher><subject>Animal behavior ; Animals ; Aquatic mammals ; Arctocephalus pusillus pusillus ; Benthos ; Breeding ; Capes (landforms) ; Colonies ; Diving ; Diving behavior ; Females ; Foraging ; Foraging behavior ; Foraging habitats ; Geographical variations ; Habitat selection ; Habitat utilization ; Habitats ; Marine fishes ; Marine mammals ; Predators ; Prey ; Rock ; Rocks ; Sea surface ; Sea surface temperature ; Seals ; Species</subject><ispartof>Marine ecology. Progress series (Halstenbek), 2020-09, Vol.649, p.201-218</ispartof><rights>Inter-Research 2020</rights><rights>Copyright Inter-Research Science Center 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c279t-812497e238221977d58d27be0d8dcabefe14feea4ed8d0171908dea96abd57723</citedby><cites>FETCH-LOGICAL-c279t-812497e238221977d58d27be0d8dcabefe14feea4ed8d0171908dea96abd57723</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/26938837$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/26938837$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,27901,27902,57992,58225</link.rule.ids></links><search><creatorcontrib>Botha, J. A.</creatorcontrib><creatorcontrib>Kirkman, S. P.</creatorcontrib><creatorcontrib>Arnould, J. P. Y.</creatorcontrib><creatorcontrib>Lombard, A. T.</creatorcontrib><creatorcontrib>Hofmeyr, G. J. G.</creatorcontrib><creatorcontrib>Meÿer, M. A.</creatorcontrib><creatorcontrib>Kotze, P. G. H.</creatorcontrib><creatorcontrib>Pistorius, P. A.</creatorcontrib><title>Geographic variation in at-sea movements, habitat use and diving behaviour of female Cape fur seals</title><title>Marine ecology. Progress series (Halstenbek)</title><description>Knowledge of animal foraging behaviour has implications for management and conservation. While Cape fur seals Arctocephalus pusillus pusillus comprise a major proportion of the southern African marine predator biomass, little is known about their at-sea movements. We investigated foraging distribution, habitat use and diving behaviour for 35 adult female Cape fur seals from 3 breeding colonies experiencing contrasting oceanographic regimes. Animals from Black Rocks, the smallest and eastern-most colony, undertook shorter foraging trips and utilised shallower waters over the shelf. In comparison, animals from the larger west coast colonies, at Kleinsee and False Bay, travelled further and utilised deeper shelf and shelf-slope waters. However, across colonies, females typically preferred depths of <500 m and slopes of <5°. Kleinsee and False Bay seals selected sea surface temperatures within the range typically preferred by pelagic prey species such as round herring, sardine and anchovy (14−19°C). Black Rocks individuals showed bimodal preferences for colder (16°C) and warmer waters (>22°C). Dive behaviour was similar between Kleinsee and False Bay individuals (unavailable from Black Rocks), with both pelagic and benthic foraging evident. Diel patterns were apparent at both sites, as dive depth and benthic diving increased significantly during daylight hours, likely reflecting vertical movements of prey species. We provide the first assessment of Cape fur seal movement behaviour for the South African component of the population. Observed geographic differences likely reflect the availability of suitable habitat but may also indicate differences in foraging strategies and densitydependent effects throughout the range of this species.</description><subject>Animal behavior</subject><subject>Animals</subject><subject>Aquatic mammals</subject><subject>Arctocephalus pusillus pusillus</subject><subject>Benthos</subject><subject>Breeding</subject><subject>Capes (landforms)</subject><subject>Colonies</subject><subject>Diving</subject><subject>Diving behavior</subject><subject>Females</subject><subject>Foraging</subject><subject>Foraging behavior</subject><subject>Foraging habitats</subject><subject>Geographical variations</subject><subject>Habitat selection</subject><subject>Habitat utilization</subject><subject>Habitats</subject><subject>Marine fishes</subject><subject>Marine mammals</subject><subject>Predators</subject><subject>Prey</subject><subject>Rock</subject><subject>Rocks</subject><subject>Sea surface</subject><subject>Sea surface temperature</subject><subject>Seals</subject><subject>Species</subject><issn>0171-8630</issn><issn>1616-1599</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNo9kEtLAzEUhYMoWKsLf4AQcCU4mtfksZSiVSi40fWQmdxpUzqTMUkH_PdOqXR14PBxzr0HoVtKnjgvxXMHQ6JcCHmGZlRSWdDSmHM0I1TRQktOLtFVSltCqBRKzlCzhLCOdtj4Bo82ept96LHvsc1FAou7MEIHfU6PeGNrn23G-wTY9g47P_p-jWvY2NGHfcShxS10dgd4YQfA7WRNEbt0jS7aSeDmX-fo--31a_FerD6XH4uXVdEwZXKhKRNGAeOaMWqUcqV2TNVAnHaNraEFKloAK2AyDv8Yoh1YI23tSqUYn6P7Y-4Qw88eUq6201n9VFkxIYTRipdqoh6OVBNDShHaaoi-s_G3oqQ6bFidNpzYuyO7TTnEE8ik4Vpzxf8Abchu4w</recordid><startdate>20200910</startdate><enddate>20200910</enddate><creator>Botha, J. A.</creator><creator>Kirkman, S. P.</creator><creator>Arnould, J. P. Y.</creator><creator>Lombard, A. T.</creator><creator>Hofmeyr, G. J. G.</creator><creator>Meÿer, M. A.</creator><creator>Kotze, P. G. H.</creator><creator>Pistorius, P. A.</creator><general>Inter-Research Science Center</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>7TN</scope><scope>7U7</scope><scope>C1K</scope><scope>F1W</scope><scope>M7N</scope></search><sort><creationdate>20200910</creationdate><title>Geographic variation in at-sea movements, habitat use and diving behaviour of female Cape fur seals</title><author>Botha, J. A. ; Kirkman, S. P. ; Arnould, J. P. Y. ; Lombard, A. T. ; Hofmeyr, G. J. G. ; Meÿer, M. A. ; Kotze, P. G. H. ; Pistorius, P. 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A.</creatorcontrib><creatorcontrib>Kirkman, S. P.</creatorcontrib><creatorcontrib>Arnould, J. P. Y.</creatorcontrib><creatorcontrib>Lombard, A. T.</creatorcontrib><creatorcontrib>Hofmeyr, G. J. G.</creatorcontrib><creatorcontrib>Meÿer, M. A.</creatorcontrib><creatorcontrib>Kotze, P. G. H.</creatorcontrib><creatorcontrib>Pistorius, P. A.</creatorcontrib><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Ecology Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><jtitle>Marine ecology. Progress series (Halstenbek)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Botha, J. A.</au><au>Kirkman, S. P.</au><au>Arnould, J. P. Y.</au><au>Lombard, A. T.</au><au>Hofmeyr, G. J. G.</au><au>Meÿer, M. A.</au><au>Kotze, P. G. H.</au><au>Pistorius, P. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Geographic variation in at-sea movements, habitat use and diving behaviour of female Cape fur seals</atitle><jtitle>Marine ecology. Progress series (Halstenbek)</jtitle><date>2020-09-10</date><risdate>2020</risdate><volume>649</volume><spage>201</spage><epage>218</epage><pages>201-218</pages><issn>0171-8630</issn><eissn>1616-1599</eissn><abstract>Knowledge of animal foraging behaviour has implications for management and conservation. While Cape fur seals Arctocephalus pusillus pusillus comprise a major proportion of the southern African marine predator biomass, little is known about their at-sea movements. We investigated foraging distribution, habitat use and diving behaviour for 35 adult female Cape fur seals from 3 breeding colonies experiencing contrasting oceanographic regimes. Animals from Black Rocks, the smallest and eastern-most colony, undertook shorter foraging trips and utilised shallower waters over the shelf. In comparison, animals from the larger west coast colonies, at Kleinsee and False Bay, travelled further and utilised deeper shelf and shelf-slope waters. However, across colonies, females typically preferred depths of <500 m and slopes of <5°. Kleinsee and False Bay seals selected sea surface temperatures within the range typically preferred by pelagic prey species such as round herring, sardine and anchovy (14−19°C). Black Rocks individuals showed bimodal preferences for colder (16°C) and warmer waters (>22°C). Dive behaviour was similar between Kleinsee and False Bay individuals (unavailable from Black Rocks), with both pelagic and benthic foraging evident. Diel patterns were apparent at both sites, as dive depth and benthic diving increased significantly during daylight hours, likely reflecting vertical movements of prey species. We provide the first assessment of Cape fur seal movement behaviour for the South African component of the population. Observed geographic differences likely reflect the availability of suitable habitat but may also indicate differences in foraging strategies and densitydependent effects throughout the range of this species.</abstract><cop>Oldendorf</cop><pub>Inter-Research Science Center</pub><doi>10.3354/meps13446</doi><tpages>18</tpages></addata></record> |
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| subjects | Animal behavior Animals Aquatic mammals Arctocephalus pusillus pusillus Benthos Breeding Capes (landforms) Colonies Diving Diving behavior Females Foraging Foraging behavior Foraging habitats Geographical variations Habitat selection Habitat utilization Habitats Marine fishes Marine mammals Predators Prey Rock Rocks Sea surface Sea surface temperature Seals Species |
| title | Geographic variation in at-sea movements, habitat use and diving behaviour of female Cape fur seals |
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