Observations of redfish (Sebastes spp.) escaping a T90 mesh codend

Article Multidisciplinary Sciences

Developing a full-scale shaking codend to reduce the capture of small fish

Vang Y. Nguyen et al.

Summary: To reduce the retention of undersized redfish in the trawl fishery, a shaking codend was developed in Canada. The shaking codend uses a mechanical stimulating device to create a shaking motion, stimulating fish movement and increasing the escape of small redfish. The movement and fishing characteristics of the shaking codend were tested and showed promising results in reducing the capture of small redfish.

PLOS ONE (2023)

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Article Fisheries

Northwest Atlantic redfish science priorities for managing an enigmatic species complex

Noel G. Cadigan et al.

CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES (2022)

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Article Engineering, Marine

Hydrodynamic Performance of Full-Scale T0 and T90 Codends with and without a Codend Cover

Zhaohai Cheng et al.

Summary: This study investigated and compared the hydrodynamic performance of different-sized codends and explored the impact of small-mesh covers using flume tank testing. The results showed that flow velocity decreased along the length of the codend, with T0 codend exhibiting a more pronounced effect. Increasing the mesh size of T90 codends did not significantly affect flow velocity. A new parameter, mesh circularity, was introduced to describe mesh opening. The results provide fundamental knowledge for understanding and improving selectivity of trawls in marine fisheries, especially regarding the masking effects of the cover net on the codend.

JOURNAL OF MARINE SCIENCE AND ENGINEERING (2022)

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Article Environmental Sciences

Juvenile redfish (Sebastes spp.) behavior in response to Nordmore grid systems in the offshore northern shrimp (Pandalus borealis) fishery of Eastern Canada

Tomas Araya-Schmidt et al.

Summary: This study investigated the behavior of juvenile redfish in response to bycatch reduction devices (BRDs) called Nordmore grids. It found that over half of the redfish passed through the bar spacings of the grids and were retained. The results of the study suggest that the duration of time in front of the grid and the upward or steady grid reactions of the redfish significantly affected their retention.

FRONTIERS IN MARINE SCIENCE (2022)

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Letter Fisheries

Response to comments on 'Increased catches of snow crab (Chionoecetes opilio) with luminescent-netting pots at long soak times' by Mullowney et al. 2021

Shannon M. Bayse et al.

FISHERIES RESEARCH (2021)

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Article Fisheries

Investigating the performance of a roller footgear in the offshore shrimp fishery of Eastern Canada using underwater video

T. Araya-Schmidt et al.

Summary: This study evaluated the performance of roller footgear in reducing negative benthic impacts and fuel usage compared to non-rolling rockhopper footgear in the Northern shrimp fishery. Results showed that footgear sections rotated at low rates, with significantly longer rotation times on mixed and soft seabeds compared to hard seabeds. The findings suggest that roller footgear may not be rotating as quickly as expected, providing valuable insights for further development of innovative footgear to minimize seabed impact.

FISHERIES RESEARCH (2021)

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Article Fisheries