Prevalence and Abundance of Cyamid "Whale Lice" (Cyamus ceti) on Subsistence Harvested Bowhead Whales (Balaena mysticetus)

We present findings on the prevalence and abundance of cyamid ectoparasites (Cyamus ceti) or "whale lice" on bowhead whales (Balaena mysticetus) harvested for subsistence in the Bering, Chukchi, and Beaufort Seas from 1973 to 2015. Cyamids were present on 20% of the 673 whales that were ex...

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Veröffentlicht in:Arctic 2016-12, Vol.69 (4), p.331-340
Hauptverfasser: Von Duyke, Andrew L., Stimmelmayr, Raphaela, Sheffield, Gay, Sformo, Todd, Suydam, Robert, Givens, Geof H., George, John C.
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container_end_page 340
container_issue 4
container_start_page 331
container_title Arctic
container_volume 69
creator Von Duyke, Andrew L.
Stimmelmayr, Raphaela
Sheffield, Gay
Sformo, Todd
Suydam, Robert
Givens, Geof H.
George, John C.
description We present findings on the prevalence and abundance of cyamid ectoparasites (Cyamus ceti) or "whale lice" on bowhead whales (Balaena mysticetus) harvested for subsistence in the Bering, Chukchi, and Beaufort Seas from 1973 to 2015. Cyamids were present on 20% of the 673 whales that were examined for cyamid ectoparasites. Logistic regression was used to determine factors associated with cyamid prevalence. The probability of cyamid presence increased with age, length, and improving body condition, but decreased over the past 35 years. Cyamid presence was also more probable on whales harvested in the spring than on those harvested in the fall. When present, cyamid abundance was typically low (< 10 per whale). Case histories provide ancillary information about the relationships between abundance of cyamids and their bowhead hosts. Environmental change and increasing anthropogenic disturbances are expected to occur in the Arctic regions inhabited by bowheads. We recommend continued monitoring of subsistence harvested whales for cyamids, as well as further investigations into the roles of environmental and anthropogenic variables in cyamid prevalence and abundance, as part of a comprehensive program of Arctic ecosystem assessment. Nous présentons nos constatations en matière de prévalence et d'abondance de l'ectoparasite cyamidae (Cyamus ceti) ou « pou des baleines » se trouvant sur la baleine boréale (Balaena mysticetus) capturée à des fins de subsistance dans la mer de Béring, la mer des Tchouktches et la mer de Beaufort entre 1973 et 2015. Les cyamidae étaient présents sur 20 % des 673 baleines qui ont été examinées dans le but d'y trouver des ectoparasites cyamidae. La régression logistique a servi à déterminer les facteurs liés à la prévalence de cyamidae. La probabilité de la présence de cyamidae augmentait en fonction de l'âge, de la longueur et de l'amélioration de l'état corporel, mais elle a diminué au cours des 35 dernières années. De plus, la présence de cyamidae était également plus probable chez les baleines capturées au printemps que chez les baleines capturées à l'automne. Lorsque présents, les cyamidae étaient généralement de faible abondance (< 10 par baleine). Les cas types fournissent des renseignements supplémentaires sur les relations entre l'abondance de cyamidae et les baleines hôtes. Des changements environnementaux et de plus grandes perturbations anthropiques sont attendus dans les régions arctiques où évolue la baleine boréale. Nous r
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Cyamids were present on 20% of the 673 whales that were examined for cyamid ectoparasites. Logistic regression was used to determine factors associated with cyamid prevalence. The probability of cyamid presence increased with age, length, and improving body condition, but decreased over the past 35 years. Cyamid presence was also more probable on whales harvested in the spring than on those harvested in the fall. When present, cyamid abundance was typically low (&lt; 10 per whale). Case histories provide ancillary information about the relationships between abundance of cyamids and their bowhead hosts. Environmental change and increasing anthropogenic disturbances are expected to occur in the Arctic regions inhabited by bowheads. We recommend continued monitoring of subsistence harvested whales for cyamids, as well as further investigations into the roles of environmental and anthropogenic variables in cyamid prevalence and abundance, as part of a comprehensive program of Arctic ecosystem assessment. Nous présentons nos constatations en matière de prévalence et d'abondance de l'ectoparasite cyamidae (Cyamus ceti) ou « pou des baleines » se trouvant sur la baleine boréale (Balaena mysticetus) capturée à des fins de subsistance dans la mer de Béring, la mer des Tchouktches et la mer de Beaufort entre 1973 et 2015. Les cyamidae étaient présents sur 20 % des 673 baleines qui ont été examinées dans le but d'y trouver des ectoparasites cyamidae. La régression logistique a servi à déterminer les facteurs liés à la prévalence de cyamidae. La probabilité de la présence de cyamidae augmentait en fonction de l'âge, de la longueur et de l'amélioration de l'état corporel, mais elle a diminué au cours des 35 dernières années. De plus, la présence de cyamidae était également plus probable chez les baleines capturées au printemps que chez les baleines capturées à l'automne. Lorsque présents, les cyamidae étaient généralement de faible abondance (&lt; 10 par baleine). Les cas types fournissent des renseignements supplémentaires sur les relations entre l'abondance de cyamidae et les baleines hôtes. Des changements environnementaux et de plus grandes perturbations anthropiques sont attendus dans les régions arctiques où évolue la baleine boréale. Nous recommandons la surveillance continue des baleines attrapées à des fins de subsistance pour en détecter les cyamidae. Nous recommandons également des études plus approfondies afin de déterminer le rôle des variables environnementales et anthropiques en matière de prévalence et d'abondance des cyamidae, dans le cadre d'un programme exhaustif d'évaluation de l'écosystème arctique.</description><identifier>ISSN: 0004-0843</identifier><identifier>EISSN: 1923-1245</identifier><identifier>DOI: 10.14430/arctic4593</identifier><language>eng</language><publisher>Calgary: Arctic Institute of North America</publisher><subject>Animal behavior ; Anthropogenic factors ; Aquatic mammals ; Arctic zone ; Balaena mysticetus ; Biometrics ; Body condition ; Cooperation ; Cyamus ceti ; Ecology ; Ecosystem assessment ; Ectoparasites ; Environmental changes ; Fisheries ; Genitalia ; Lice ; Modeling ; Moorings ; Parasites ; Physiology ; Scars ; Skin ; Variables ; Whales ; Whales &amp; whaling ; Whaling ; Wildlife management</subject><ispartof>Arctic, 2016-12, Vol.69 (4), p.331-340</ispartof><rights>Copyright Canada 2016 Arctic Institute of North America</rights><rights>Copyright Arctic Institute of North America Dec 2016</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c316t-e514f412b1297c924d8a311780258d6d59b0985749c1074a6f0bae7714889d5d3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/24878031$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/24878031$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,27924,27925,58017,58250</link.rule.ids></links><search><creatorcontrib>Von Duyke, Andrew L.</creatorcontrib><creatorcontrib>Stimmelmayr, Raphaela</creatorcontrib><creatorcontrib>Sheffield, Gay</creatorcontrib><creatorcontrib>Sformo, Todd</creatorcontrib><creatorcontrib>Suydam, Robert</creatorcontrib><creatorcontrib>Givens, Geof H.</creatorcontrib><creatorcontrib>George, John C.</creatorcontrib><title>Prevalence and Abundance of Cyamid "Whale Lice" (Cyamus ceti) on Subsistence Harvested Bowhead Whales (Balaena mysticetus)</title><title>Arctic</title><description>We present findings on the prevalence and abundance of cyamid ectoparasites (Cyamus ceti) or "whale lice" on bowhead whales (Balaena mysticetus) harvested for subsistence in the Bering, Chukchi, and Beaufort Seas from 1973 to 2015. Cyamids were present on 20% of the 673 whales that were examined for cyamid ectoparasites. Logistic regression was used to determine factors associated with cyamid prevalence. The probability of cyamid presence increased with age, length, and improving body condition, but decreased over the past 35 years. Cyamid presence was also more probable on whales harvested in the spring than on those harvested in the fall. When present, cyamid abundance was typically low (&lt; 10 per whale). Case histories provide ancillary information about the relationships between abundance of cyamids and their bowhead hosts. Environmental change and increasing anthropogenic disturbances are expected to occur in the Arctic regions inhabited by bowheads. We recommend continued monitoring of subsistence harvested whales for cyamids, as well as further investigations into the roles of environmental and anthropogenic variables in cyamid prevalence and abundance, as part of a comprehensive program of Arctic ecosystem assessment. Nous présentons nos constatations en matière de prévalence et d'abondance de l'ectoparasite cyamidae (Cyamus ceti) ou « pou des baleines » se trouvant sur la baleine boréale (Balaena mysticetus) capturée à des fins de subsistance dans la mer de Béring, la mer des Tchouktches et la mer de Beaufort entre 1973 et 2015. Les cyamidae étaient présents sur 20 % des 673 baleines qui ont été examinées dans le but d'y trouver des ectoparasites cyamidae. La régression logistique a servi à déterminer les facteurs liés à la prévalence de cyamidae. La probabilité de la présence de cyamidae augmentait en fonction de l'âge, de la longueur et de l'amélioration de l'état corporel, mais elle a diminué au cours des 35 dernières années. De plus, la présence de cyamidae était également plus probable chez les baleines capturées au printemps que chez les baleines capturées à l'automne. Lorsque présents, les cyamidae étaient généralement de faible abondance (&lt; 10 par baleine). Les cas types fournissent des renseignements supplémentaires sur les relations entre l'abondance de cyamidae et les baleines hôtes. Des changements environnementaux et de plus grandes perturbations anthropiques sont attendus dans les régions arctiques où évolue la baleine boréale. Nous recommandons la surveillance continue des baleines attrapées à des fins de subsistance pour en détecter les cyamidae. Nous recommandons également des études plus approfondies afin de déterminer le rôle des variables environnementales et anthropiques en matière de prévalence et d'abondance des cyamidae, dans le cadre d'un programme exhaustif d'évaluation de l'écosystème arctique.</description><subject>Animal behavior</subject><subject>Anthropogenic factors</subject><subject>Aquatic mammals</subject><subject>Arctic zone</subject><subject>Balaena mysticetus</subject><subject>Biometrics</subject><subject>Body condition</subject><subject>Cooperation</subject><subject>Cyamus ceti</subject><subject>Ecology</subject><subject>Ecosystem assessment</subject><subject>Ectoparasites</subject><subject>Environmental changes</subject><subject>Fisheries</subject><subject>Genitalia</subject><subject>Lice</subject><subject>Modeling</subject><subject>Moorings</subject><subject>Parasites</subject><subject>Physiology</subject><subject>Scars</subject><subject>Skin</subject><subject>Variables</subject><subject>Whales</subject><subject>Whales &amp; 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Cyamids were present on 20% of the 673 whales that were examined for cyamid ectoparasites. Logistic regression was used to determine factors associated with cyamid prevalence. The probability of cyamid presence increased with age, length, and improving body condition, but decreased over the past 35 years. Cyamid presence was also more probable on whales harvested in the spring than on those harvested in the fall. When present, cyamid abundance was typically low (&lt; 10 per whale). Case histories provide ancillary information about the relationships between abundance of cyamids and their bowhead hosts. Environmental change and increasing anthropogenic disturbances are expected to occur in the Arctic regions inhabited by bowheads. We recommend continued monitoring of subsistence harvested whales for cyamids, as well as further investigations into the roles of environmental and anthropogenic variables in cyamid prevalence and abundance, as part of a comprehensive program of Arctic ecosystem assessment. Nous présentons nos constatations en matière de prévalence et d'abondance de l'ectoparasite cyamidae (Cyamus ceti) ou « pou des baleines » se trouvant sur la baleine boréale (Balaena mysticetus) capturée à des fins de subsistance dans la mer de Béring, la mer des Tchouktches et la mer de Beaufort entre 1973 et 2015. Les cyamidae étaient présents sur 20 % des 673 baleines qui ont été examinées dans le but d'y trouver des ectoparasites cyamidae. La régression logistique a servi à déterminer les facteurs liés à la prévalence de cyamidae. La probabilité de la présence de cyamidae augmentait en fonction de l'âge, de la longueur et de l'amélioration de l'état corporel, mais elle a diminué au cours des 35 dernières années. De plus, la présence de cyamidae était également plus probable chez les baleines capturées au printemps que chez les baleines capturées à l'automne. Lorsque présents, les cyamidae étaient généralement de faible abondance (&lt; 10 par baleine). Les cas types fournissent des renseignements supplémentaires sur les relations entre l'abondance de cyamidae et les baleines hôtes. Des changements environnementaux et de plus grandes perturbations anthropiques sont attendus dans les régions arctiques où évolue la baleine boréale. Nous recommandons la surveillance continue des baleines attrapées à des fins de subsistance pour en détecter les cyamidae. Nous recommandons également des études plus approfondies afin de déterminer le rôle des variables environnementales et anthropiques en matière de prévalence et d'abondance des cyamidae, dans le cadre d'un programme exhaustif d'évaluation de l'écosystème arctique.</abstract><cop>Calgary</cop><pub>Arctic Institute of North America</pub><doi>10.14430/arctic4593</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record>
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subjects Animal behavior
Anthropogenic factors
Aquatic mammals
Arctic zone
Balaena mysticetus
Biometrics
Body condition
Cooperation
Cyamus ceti
Ecology
Ecosystem assessment
Ectoparasites
Environmental changes
Fisheries
Genitalia
Lice
Modeling
Moorings
Parasites
Physiology
Scars
Skin
Variables
Whales
Whales & whaling
Whaling
Wildlife management
title Prevalence and Abundance of Cyamid "Whale Lice" (Cyamus ceti) on Subsistence Harvested Bowhead Whales (Balaena mysticetus)
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