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Short-Term Fidelity, Habitat Use and Vertical Movement Behavior of the Black Rockfish Sebastes schlegelii as Determined by Acoustic Telemetry.

Zhang Y, Xu Q, Alós J, Liu H, Xu Q, Yang H - PLoS ONE (2015)

Bottom Line: The preference of this species for the artificial reefs that were recently deployed in the study area suggests that artificial seascapes may be effective management tools to attract individuals.The vertical movement of tagged S. schlegelii was mostly characterized by bottom dwelling behavior, and there was high individual variability in the vertical migration pattern.Our results have important implications for S. schlegelii catchability, the implementation of marine protected areas, and the identification of key species habitats, and our study provides novel information for future studies on the sustainability of this important marine resource in eastern China.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China.

ABSTRACT
The recent miniaturization of acoustic tracking devices has allowed fishery managers and scientists to collect spatial and temporal data for sustainable fishery management. The spatial and temporal dimensions of fish behavior (movement and/or vertical migrations) are particularly relevant for rockfishes (Sebastes spp.) because most rockfish species are long-lived and have high site fidelity, increasing their vulnerability to overexploitation. In this study, we describe the short-term (with a tracking period of up to 46 d) spatial behavior, as determined by acoustic tracking, of the black rockfish Sebastes schlegelii, a species subject to overexploitation in the Yellow Sea of China. The average residence index (the ratio of detected days to the total period from release to the last detection) in the study area was 0.92 ± 0.13, and most of the tagged fish were detected by only one region of the acoustic receiver array, suggesting relatively high site fidelity to the study area. Acoustic tracking also suggested that this species is more frequently detected during the day than at night in our study area. However, the diel detection periodicity (24 h) was only evident for certain periods of the tracking time, as revealed by a continuous wavelet transform. The habitat selection index of tagged S. schlegelii suggested that S. schlegelii preferred natural reefs, mixed sand/artificial reef bottoms and mixed bottoms of boulder, cobble, gravel and artificial reefs. The preference of this species for the artificial reefs that were recently deployed in the study area suggests that artificial seascapes may be effective management tools to attract individuals. The vertical movement of tagged S. schlegelii was mostly characterized by bottom dwelling behavior, and there was high individual variability in the vertical migration pattern. Our results have important implications for S. schlegelii catchability, the implementation of marine protected areas, and the identification of key species habitats, and our study provides novel information for future studies on the sustainability of this important marine resource in eastern China.

No MeSH data available.


Chronograms of the hourly detections (pooled from all receivers) of the six tagged S. schlegelii.
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pone.0134381.g002: Chronograms of the hourly detections (pooled from all receivers) of the six tagged S. schlegelii.

Mentions: A total of 36,389 acoustic detections were collected from the six tagged fish in our acoustic tracking experiment at Ping Island (Fig 2). The mean (± s.d.) number of detections of each fish was 6065 ± 4241 and ranged from a minimum of 791 (ID: 333) to a maximum of 11201 (ID: 326). The fish were detected by at least one (ID: 332) and a maximum of 3 receivers (ID: 329, 330, 333 and 334), and fish 326 was detected by two receivers (Fig 3). The total DD of the tagged fish ranged from 19 to 46 days, with an average of 28.67 ± 10.97 days. One fish (ID: 332) was detected in varying hourly detections throughout the entire study period (1 August to 15 September), a total of 46 days (Fig 2). Another fish (ID: 330) was detected for 38 days but was lost from 30 Aug to 7 Sep, with a total period of 46 days. Fishes 329 and 334 were detected before 31 Aug for 30 days and 21 days, with total periods of 31 days and 30 days respectively. Fishes 326 and 333 were detected continuously until 19 August, a total of 19 days. The residence index of tagged fish in the whole receiver array ranged from 0.70 to 1.00, with an average of 0.92 ± 0.13 (Table 1). Four of six tagged fish were detected in only one region of the study area and exhibited different degrees of site fidelity in their particular region (Table 1). Fish 326 was mainly detected in the NE region (R08), fish 329, 330 and 333 were only detected in the SW region (R01, R02 and R03), and fish 332 was only detected in the E region (R07), the deepest position of the acoustic array (Fig 1 (H)).


Short-Term Fidelity, Habitat Use and Vertical Movement Behavior of the Black Rockfish Sebastes schlegelii as Determined by Acoustic Telemetry.

Zhang Y, Xu Q, Alós J, Liu H, Xu Q, Yang H - PLoS ONE (2015)

Chronograms of the hourly detections (pooled from all receivers) of the six tagged S. schlegelii.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4556453&req=5

pone.0134381.g002: Chronograms of the hourly detections (pooled from all receivers) of the six tagged S. schlegelii.
Mentions: A total of 36,389 acoustic detections were collected from the six tagged fish in our acoustic tracking experiment at Ping Island (Fig 2). The mean (± s.d.) number of detections of each fish was 6065 ± 4241 and ranged from a minimum of 791 (ID: 333) to a maximum of 11201 (ID: 326). The fish were detected by at least one (ID: 332) and a maximum of 3 receivers (ID: 329, 330, 333 and 334), and fish 326 was detected by two receivers (Fig 3). The total DD of the tagged fish ranged from 19 to 46 days, with an average of 28.67 ± 10.97 days. One fish (ID: 332) was detected in varying hourly detections throughout the entire study period (1 August to 15 September), a total of 46 days (Fig 2). Another fish (ID: 330) was detected for 38 days but was lost from 30 Aug to 7 Sep, with a total period of 46 days. Fishes 329 and 334 were detected before 31 Aug for 30 days and 21 days, with total periods of 31 days and 30 days respectively. Fishes 326 and 333 were detected continuously until 19 August, a total of 19 days. The residence index of tagged fish in the whole receiver array ranged from 0.70 to 1.00, with an average of 0.92 ± 0.13 (Table 1). Four of six tagged fish were detected in only one region of the study area and exhibited different degrees of site fidelity in their particular region (Table 1). Fish 326 was mainly detected in the NE region (R08), fish 329, 330 and 333 were only detected in the SW region (R01, R02 and R03), and fish 332 was only detected in the E region (R07), the deepest position of the acoustic array (Fig 1 (H)).

Bottom Line: The preference of this species for the artificial reefs that were recently deployed in the study area suggests that artificial seascapes may be effective management tools to attract individuals.The vertical movement of tagged S. schlegelii was mostly characterized by bottom dwelling behavior, and there was high individual variability in the vertical migration pattern.Our results have important implications for S. schlegelii catchability, the implementation of marine protected areas, and the identification of key species habitats, and our study provides novel information for future studies on the sustainability of this important marine resource in eastern China.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China.

ABSTRACT
The recent miniaturization of acoustic tracking devices has allowed fishery managers and scientists to collect spatial and temporal data for sustainable fishery management. The spatial and temporal dimensions of fish behavior (movement and/or vertical migrations) are particularly relevant for rockfishes (Sebastes spp.) because most rockfish species are long-lived and have high site fidelity, increasing their vulnerability to overexploitation. In this study, we describe the short-term (with a tracking period of up to 46 d) spatial behavior, as determined by acoustic tracking, of the black rockfish Sebastes schlegelii, a species subject to overexploitation in the Yellow Sea of China. The average residence index (the ratio of detected days to the total period from release to the last detection) in the study area was 0.92 ± 0.13, and most of the tagged fish were detected by only one region of the acoustic receiver array, suggesting relatively high site fidelity to the study area. Acoustic tracking also suggested that this species is more frequently detected during the day than at night in our study area. However, the diel detection periodicity (24 h) was only evident for certain periods of the tracking time, as revealed by a continuous wavelet transform. The habitat selection index of tagged S. schlegelii suggested that S. schlegelii preferred natural reefs, mixed sand/artificial reef bottoms and mixed bottoms of boulder, cobble, gravel and artificial reefs. The preference of this species for the artificial reefs that were recently deployed in the study area suggests that artificial seascapes may be effective management tools to attract individuals. The vertical movement of tagged S. schlegelii was mostly characterized by bottom dwelling behavior, and there was high individual variability in the vertical migration pattern. Our results have important implications for S. schlegelii catchability, the implementation of marine protected areas, and the identification of key species habitats, and our study provides novel information for future studies on the sustainability of this important marine resource in eastern China.

No MeSH data available.