Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA
We assessed the seasonal co-occurrence of sea turtles and bottlenose dolphins Tursiops truncatus with commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA, from 41 aerial surveys conducted from 2004 to 2006. Generalized linear models w...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Inter-Research
2013-12-01
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| Series: | Endangered Species Research |
| Online Access: | https://www.int-res.com/abstracts/esr/v22/n3/p235-249/ |
| _version_ | 1798022064356982784 |
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| author | AG Hall J Braun McNeill PB Conn E Davenport AA Hohn |
| author_facet | AG Hall J Braun McNeill PB Conn E Davenport AA Hohn |
| author_sort | AG Hall |
| collection | DOAJ |
| description | We assessed the seasonal co-occurrence of sea turtles and bottlenose dolphins Tursiops truncatus with commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA, from 41 aerial surveys conducted from 2004 to 2006. Generalized linear models were used to examine the influence of several variables (month, year, habitat type [coastal and estuarine], sea surface temperature, and visibility conditions) on counts of turtles, dolphins, and gill nets. A total of 86 turtles, 1559 dolphins, and 378 gill nets were observed. Predicted counts of turtles and dolphins were highest concurrent with gill nets in spring and autumn in both habitats. Observed spatial overlap of dolphins and gill nets occurred throughout the estuary from spring to autumn, but was limited mainly to the eastern portion of the estuary in winter; spatial overlap of turtles and gill nets occurred predominantly in the eastern portion of the estuary in spring and autumn, and throughout the estuary in summer. During all seasons, dolphins (57 to 75%) and gill nets (80 to 88%) were predominantly observed in shallow (<2 m) waters of the estuary; turtles (75%) were seen most often in shallow estuarine waters in spring. Along the coast, observed spatial overlap of turtles and dolphins with gill nets occurred most often in the region extending from Cape Hatteras south to Ocracoke. These findings improve our knowledge of habitat use by these species, and may also help manage interactions. |
| first_indexed | 2024-04-11T17:23:47Z |
| format | Article |
| id | doaj.art-aa79b06121964a89b3eaed8b564239de |
| institution | Directory Open Access Journal |
| issn | 1863-5407 1613-4796 |
| language | English |
| last_indexed | 2024-04-11T17:23:47Z |
| publishDate | 2013-12-01 |
| publisher | Inter-Research |
| record_format | Article |
| series | Endangered Species Research |
| spelling | doaj.art-aa79b06121964a89b3eaed8b564239de2022-12-22T04:12:25ZengInter-ResearchEndangered Species Research1863-54071613-47962013-12-0122323524910.3354/esr00539Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USAAG Hall0J Braun McNeill1PB Conn2E Davenport3AA Hohn4National Marine Fisheries Service, Southeast Fisheries Science Center, Beaufort Laboratory, 101 Pivers Island Road, Beaufort, North Carolina 28516, USANational Marine Fisheries Service, Southeast Fisheries Science Center, Beaufort Laboratory, 101 Pivers Island Road, Beaufort, North Carolina 28516, USANational Marine Fisheries Service, Southeast Fisheries Science Center, Beaufort Laboratory, 101 Pivers Island Road, Beaufort, North Carolina 28516, USANational Ocean Service, National Center for Coastal Ocean Science, Center for Coastal Monitoring and Assessment, 1305 East-West Hwy, Silver Spring, Maryland 20910, USANational Marine Fisheries Service, Southeast Fisheries Science Center, Beaufort Laboratory, 101 Pivers Island Road, Beaufort, North Carolina 28516, USAWe assessed the seasonal co-occurrence of sea turtles and bottlenose dolphins Tursiops truncatus with commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA, from 41 aerial surveys conducted from 2004 to 2006. Generalized linear models were used to examine the influence of several variables (month, year, habitat type [coastal and estuarine], sea surface temperature, and visibility conditions) on counts of turtles, dolphins, and gill nets. A total of 86 turtles, 1559 dolphins, and 378 gill nets were observed. Predicted counts of turtles and dolphins were highest concurrent with gill nets in spring and autumn in both habitats. Observed spatial overlap of dolphins and gill nets occurred throughout the estuary from spring to autumn, but was limited mainly to the eastern portion of the estuary in winter; spatial overlap of turtles and gill nets occurred predominantly in the eastern portion of the estuary in spring and autumn, and throughout the estuary in summer. During all seasons, dolphins (57 to 75%) and gill nets (80 to 88%) were predominantly observed in shallow (<2 m) waters of the estuary; turtles (75%) were seen most often in shallow estuarine waters in spring. Along the coast, observed spatial overlap of turtles and dolphins with gill nets occurred most often in the region extending from Cape Hatteras south to Ocracoke. These findings improve our knowledge of habitat use by these species, and may also help manage interactions.https://www.int-res.com/abstracts/esr/v22/n3/p235-249/ |
| spellingShingle | AG Hall J Braun McNeill PB Conn E Davenport AA Hohn Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA Endangered Species Research |
| title | Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA |
| title_full | Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA |
| title_fullStr | Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA |
| title_full_unstemmed | Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA |
| title_short | Seasonal co-occurrence of sea turtles, bottlenose dolphins, and commercial gill nets in southern Pamlico and northern Core Sounds, and adjacent coastal waters of North Carolina, USA |
| title_sort | seasonal co occurrence of sea turtles bottlenose dolphins and commercial gill nets in southern pamlico and northern core sounds and adjacent coastal waters of north carolina usa |
| url | https://www.int-res.com/abstracts/esr/v22/n3/p235-249/ |
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