Shannon M. Bayse

Memorial University of Newfoundland · Centre for Sustainable Aquatic Resources (CSAR)

Catch rates were compared between gillnets with and without bait in the Greenland halibut Reinhardtius hippoglossoides (Walbaum) fishery off Baffin Island, Canada. Two different types of baiting techniques were compared: bait bags where squid were placed into 2‐mm mesh bags, and tied bait where squid were tied into meshes. Both types of baited gill...

Luminescent netting increases the catch rate of snow crabs (Chionoecetes opilio) over short soak times (1 d), however the commercial fishery often requires longer soak periods, up to 1 week. Building on previous research, this study investigated the catch efficiency and size selectivity of pots with luminescent netting over long soak times (144-336...

The size selectivity of four codends were compared in the Gulf of St. Lawrence, Canada redfish fishery, including the regulated diamond mesh codend with a mesh opening of 90 mm (T0) and three experimental codends of different mesh openings (90, 100, 110 mm) in which the netting is turned 90° to the direction of tow (T90). Results for the regulated...

Temperature fluctuations and climate change impacts may substantially affect spawning success of fish, especially migratory species with a limited spawning window. Factors affecting American shad (Alosa sapidissima) spawning success and survival were investigated at different temperatures and periods (peak- and late-spawning periods) during the Con...

The hydrodynamic performance of one full-scale T0 (mesh size 90 mm) and three T90 (mesh size 90, 100, and 110 mm) codends was investigated and compared using flume tank testing, with and without a small-mesh cover. We evaluated how flow velocity, mesh circularity, and drag changed in each codend at five different towing speeds (0.5–0.9 m/s). The re...

The offshore Northern shrimp (Pandalus borealis) fishery in Eastern Canada is currently harvested by factory freezer vessels using bottom trawls. This fishery is a major contributor to the regions' economy, however, bottom trawling typically is associated with negative benthic impacts. We evaluated the at-sea engineering performance of a roller foo...

In response to concerns over the mortality of discards and other negative environmental impacts of otter trawling for penaeids, the utility of bottom-set gillnets deployed by artisanal vessels to target Penaeus monodon, Meta-penaeus affinis and other retained species by-product was assessed in the Sea of Oman. Two gillnets (each comprising several...

The size selectivity and usability of three codends were quantified and compared for the first time in the inshore Northern shrimp (Pandalus borealis) trawl fishery of Iceland using the covered codend method: a conventional diamond-mesh codend (T0), conventional square-mesh codend (T45), and a 90 • turned mesh codend (T90) constructed of four panel...

Iranian coastal fishers targeting narrow-barred Spanish mackerel ( Scomberomorus commerson ) recently replaced their historical multifilament gillnets with those made from monofilament, evoking management concerns over potential increases in catch-per-unit-of-effort. During 20 fishing days, we compared catches from replicate surface-set gillnets th...

Juvenile American shad (Alosa sapidissima) experience a wide range of temperatures in rivers before migrating to the ocean. Temperatures in these freshwater environments can vary greatly spatially, seasonally, year-to-year, and can be impacted by anthropogenic factors such as power plant discharge or climate change. Currently, there is uncertainty...

The choice of fishing gear and catching strategy should be taken into consideration in the management of fish stocks. Here, paired fishing trials in a pelagic recreational fishery compared the catch composition, catch rate and size selectivity between handline and trolling fishing methods in Iranian coastal waters of the Gulf of Oman. Total catch r...

The size selectivity and usability of two diamond mesh codends, a traditional two-panel codend versus an experimental four-panel ultra-cross knotless mesh codend, were compared using the covered codend method in the Iceland redfish (Sebastes norvegicus and S. viviparous) fishery. Results showed that there was no significant difference in size selec...

In this study, we investigated luminescent netting as a means to improve the catch rates of snow crabs Chionoecetes opilio. A laboratory experiment was conducted to investigate the intensity and duration of luminescence using time‐lapse photography. We exposed experimental traps to five different treatments of UV light to excite the luminescent fib...

How seasonal effects, such as temperature increases and reduced lipid content affect the ability of anadromous fish to traverse high-velocity barriers and sprint swimming is poorly understood. Here we evaluate American shad (Alosa sapidissima) swimming performance in a flume against high flow velocities (2.5-3.7 m·s−1) during the upstream migration...

Snow crab (Chionoecetes opilio) has become an important species for the Norwegian seafood industry since its first commercial harvest in 2012. However, periodically catch rates can be low, causing a financial strain on the fishery. Thus, improving the catch rate of existing pot designs has the potential to significantly improve the profitability of...

Lipid content forms the most important energy reserve in anadromous fish and can limit survival, migration and reproductive success. A fat meter was evaluated and compared with a traditional extractive method of measuring available lipid for migrating American shad Alosa sapidissima in the Connecticut River, U.S.A. The fat meter gives rapid (< 10 s...

A species separation grid was tested for a squid trawl to reduce finfish bycatch in the Nantucket Sound longfin inshore squid (Doryteuthis pealeii) fishery in southern New England, USA. The experimental trawl with a grid significantly reduces bycatch of summer flounder (Paralichthys dentatus) (76.4%, p < .001), black sea bass (Centropristis striata...

Small-mesh otter trawls, which use 76 mm or less codend mesh sizes, are considered "exempt" gears in some fishery management plans in the US. In New England, small-mesh trawls are utilized to capture small-bodied Northern shrimp (Pandalus borealis), silver hake (Merluccius bilinearis), and longfin inshore squid (Doryteuthis pealeii), which are too...

The effectiveness of a trawl configured with drop-chain groundgear to capture target species and release bycatch was evaluated with underwater video recordings in the Nantucket Sound squid fishery off Cape Cod, MA. Entrance into trawl or escape underneath the fishing line was quantified for targeted longfin inshore squid (Doryteuthis pealeii), and...

Underwater video recordings in the mouth of a squid trawl were used to evaluate the effectiveness of a trawl configured with drop-chain groundgear to catch longfin inshore squid (Doryteuthis pealeii) and reduce bycatch of finfish in the Nantucket Sound squid fishery off Cape Cod, Massachusetts, USA. Entrance through the trawl mouth or escape undern...

In an effort to improve the selectivity of beam trawls targeting flatfish, codend size selectivity of three flatfish and two roundfish species were compared testing 80 mm diamond-shaped mesh (T0), versus 80 mm mesh turned 90⁰ (T90). The results demonstrate that the T90 codend significantly increased size selectivity for the two roundfish investigat...

Underwater video recording of the behavior of longfin inshore squid (Doryteuthis pealeii) in response to a Nordmøre-style finfish bycatch reduction grid installed in the extension of a trawl was made during experimental fishing in Nantucket Sound off Cape Cod, Massachusetts, USA. Swimming and jetting behavior, time in trawl extension, position, and...

Small mesh trawls targeting silver hake (Merluccius bilinearis) in the Northeast U.S. are managed as exemptions to the Northeast Multispecies Management Plan and the gear must meet the requirement that bycatch of regulated groundfish species does not exceed 5% of the total catch. At present, either a raised-footrope or sweepless trawl in conjunctio...

In the Northwest Atlantic Ocean, longfin inshore squid (Doryteuthis pealeii) are captured by otter trawls in a relatively stable fishery in terms of squid populations. However, this fishery does have high bycatch amounts of unwanted fish species due to the small mesh sizes used. Bycatch reduction devices (grids, large-mesh panels, etc.) are used in...

Pop-up satellite archival tags (PSATs) were deployed on 19 sailfish Istiophorus platypterus captured in the southern Gulf of Mexico and Florida Straits between 2005 and 2007 on commercial pelagic longline gear (n = 18) and recreational rod-and-reel gear (n = 1). The data from three tags indicated mortality events and were excluded from subsequent a...

The pelagic longline fishery off Cape Hattaras in the western North Atlantic Ocean, which targets swordfish (Xiphias gladius, Linnaeus 1758) and tunas (Thunnus spp.), has a high frequency of interactions with marine mammals, particularly pilot whales (Globicephala spp.). The typical hooks used in the this fishery are size 16/0 ‘‘strong’’ hooks that...

A total of 19 pop-up satellite archival tags (PSATs) were deployed on sailfish in the southern Gulf of Mexico between 2005 and 2007 aboard a commercial pelagic longline vessel (n = 18) and a recreational rod-and-reel vessel (n = 1). All PSATs were programmed to collect pressure (depth), temperature, and light-level data for 10 days at approximat...