The bait purse-seine fishery for Atlantic menhaden, Brevoortia tyrannus, in the Virginia portion of Chesapeake bay.
Atlantic menhaden, Brevoortia tyrannus, are estuarine-dependent, marine migratory members of the herring family of fishes (Ahrenholz, 1991). They are of moderate size, with some specimens reaching over 300 mm in fork length and weighing up to 1.0-1.5 kg. Menhaden are ubiquitous, occurring in coastal waters of the U.S. Atlantic coast, and inhabiting most major estuarine systems. Spring through fall, menhaden form large near-surface schools, which are the targets of a large industrial fishery for fish meal, fish oil, and fish solubles (Smith, 1991).
Menhaden flesh is high in protein (Dubrow et al., 1976) and rich in marine oils and fatty acids (Joseph, 1985). Given these qualities and the ubiquitous nature of menhaden schools, it is not surprising that menhaden are a preferred bait for trap or pot fisheries for blue crab (Van Engel, 1962; Warner, 1976), American lobster (The Free Press, 2010), and crawfish (LSU AgCenter, 2008).
The purse-seine reduction fisheries for Atlantic menhaden are well-documented (Nicholson, 1975; Smith, 1991) and stock assessments are conducted regularly as prescribed in the Fishery Management Plan (FMP) for the species (ASMFC, 2001). During the early 1990's, the Atlantic Menhaden Advisory Committee (AMAC) of the Atlantic States Marine Fisheries Commission (ASMFC), which at the time was responsible for reviewing menhaden fishery-dependent data, was concerned that harvests of menhaden for bait were increasing, while landings for major segments of the bait fishery may have been undocumented. Beginning in 1994, the AMAC took steps to improve data collection of menhaden bait landings and age and size composition of the catch.
One substantial facet of the bait fishery that was suspected of under-reported landings was a directed purse-seine fishery for bait which developed during the 1970's among several vessels in the Virginia portion of Chesapeake Bay. These craft were smaller than the vessels in the industrial fishery, with commensurate reductions of gear and crew members. The vessels and their purse-seine gear are colloquially called "snapper rigs" in Tidewater Virginia. The origin of the term is ill-defined, but it probably reflects local slang. Small bluefish, Pomatomus saltatrix, are locally referred to as snappers, and some suggest that this scaling vernacular was likewise applied to the menhaden bait gear. One source (Castro et al., 2007) indicates that the term was coincidently adopted for bait vessels and purse-seine gear in Narragansett Bay, R.I. Regardless of the moniker's origin, by an unusual nuance in Virginia fisheries statutes, regulatory authority over the menhaden fisheries in the Old Dominion resides with the legislature in the Commonwealth's capital at Richmond, and not with the Virginia Marine Resources Commission (VMRC) in Newport News, which regulates all other marine fisheries resources. With VMRC lacking statutory authority to collect menhaden data, bait landings by snapper rigs consequently often went unreported.
In 1994 the AMAC formed a Bait Subcommittee to better substantiate menhaden bait landings along the U.S. eastern seaboard. AMAC members from the Beaufort Laboratory of the National Marine Fisheries Service, owing to decades of work with the reduction purse-seine fishery in Chesapeake Bay, were asked to document landings and age and size composition of the catch in Virginia's snapper rig bait fishery. In this report we describe our efforts to improve data collection for the menhaden purse-seine bait fishery in Chesapeake Bay. Herein, we: 1) characterize the bait purse-seine fishery for Atlantic menhaden in Virginia by describing the vessels, gear, and disposition of the catch, 2) describe catch and fishing effort, especially seasonality and areal distribution of the catch, using annual logbook data sets, and 3) describe the age and size composition of the catch through port samples, as well as the disposition of the catch.
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At the start of the 1995 fishing season, to better quantify menhaden bait landings in Virginia, we identified and solicited captains of menhaden bait vessels to voluntarily complete daily logbooks of fishing activity called Captain's Daily Fishing Reports, or CDFR's (Fig. 1); these are identical to CDFR's completed by reduction vessels where compliance in Virginia is 100% (Smith, 1999). For each purse-seine set, CDFR's enumerate time of set, an "at-sea" estimate of catch and fishing location, whether an aircraft was used to direct the set, distance from shore, and some weather variables. CDFR's were maintained onboard by vessel crews throughout the fishing season and were collected at season's end.
Between 1995-97 most, but not all, snapper rigs participated in the CDFR program; beginning in 1998 to the present, compliance by Virginia bait vessels has been 100%. In 2001, to ensure future compliance, Amendment 1 of ASMFC's FMP for Atlantic menhaden (ASMFC, 2001) specified mandatory reporting of landings by all menhaden bait purse-seine vessels preferably using CDFR forms. At a minimum, snapper rig captains complete a CDFR form if they make at least one purse-seine set during a given fishing day. Although not required by Amendment 1, some but not all snapper rig captains complete CDFR's for days when no sets are made, noting if they did not leave the dock or, if they left the dock, that they did not make a set on the fishing grounds.
Bait CDFR's were collated, key-entered, edited, and stored as annual data sets at the NMFS Beaufort Laboratory. Summary and statistical analyses were performed using SAS (SAS, 1995) programs. CDFR forms were relatively unaltered through 2004 (Fig. 1). In 2005 data fields were added to capture GPS coordinates of fishing locations; prior to this, fishing locations were identified by one of seven large fishing zones in the Virginia portion of Chesapeake Bay (Fig. 2) and by distance from nearest prominent geographic point. In 2009, the form was revamped again (Fig. 3) so that data were optically scanned directly into electronic files, vs. data-capture via the time-consuming key-entry process.
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Beginning in 1995, the menhaden port agent at Reedville, Va., was directed to acquire dockside samples of Atlantic menhaden from bait vessels, all of which operate from the Northern Neck region, near the menhaden reduction factory at Reedville. Sampling intensity, or target number of bait port samples for a fishing season, was about 40, based on a historical proportion of samples to landings in the reduction fishery.
Biological sampling of the bait fishery is similar to that of the reduction fishery and is based on a two-stage cluster design (Chester, 1984). The port agent randomly selects the bait vessels, and at dockside retrieves a bucket of fish (first cluster) from the top of the vessel's fish hold. The sample is assumed to represent fish from the last purse-seine set of the day, not the entire boat load or trip. The agent ascertains from the crew the location and date of the last set. From the bucket the agent randomly selects ten fish (second cluster), which are measured (fork length in mm), weighed (grams), and some scales are removed for aging. June and Roithmayr (1960) performed detailed examinations (validation and verification) of Atlantic menhaden scales and determined that rings on the scales are reliable age marks.
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Description of Virginia's Bait Purse-Seine Fishery for Atlantic Menhaden
During 1995-2009, a total of eight vessels participated in the bait purse-seine fishery in Northern Neck. Up to five vessels fished during 1999-2000, four during 2001-05, three during 2006-08, and four in 2009; only one vessel fished continuously through the entire time period. All but one or two of the vessels fished from the port of Reedville (Cockrell's Creek) near Smith Point at the mouth of the Potomac River (Fig. 2); landings also occurred near Weems along the north shore of the lower Rappahannock River.
Of the five vessels active in the bait fishery over the past 5 years, three were built for the menhaden reduction fishery. The Taylor's Creek (Fig. 4) and Hushpuppy (Fig. 5) originally fished on menhaden for reduction at Beaufort, N.C. They were "sound boats" making day-trips to fish in central North Carolina's coastal sounds and bays. The Hushpuppy was sold to a bait concern in Northern Neck in about 1988; the Taylor's Creek moved to Virginia in 1998. The Carter's Creek (Fig. 6) was originally the Absecon and fished in the reduction fishery during the 1950's and 1960's. In about 1978 she was converted to a clam dredger for the surf clam, Spisula solidissima, and ocean quohog, Artica islandica, fishery in the mid Atlantic, and also fished as a trawler for horseshoe crabs, Limulus polyphemus. She was retrofitted again in 2005 to purse seine menhaden for bait.
The Osprey (Fig. 7) was originally built as a shrimp trawler for the southeast U.S. coast, and was converted to a menhaden vessel in about 1996. The Indian Creek (Fig. 8) was a former military tugboat, and it was converted to a bait purse-seiner for the 2009 fishery. Four of the five vessels in the fishery during the past 5 years are less than 100 ft long. In the parlance of the menhaden fishery, maximum hold capacities of the four extant bait vessels in 2009 ranged from 250,000 to 550,000 "standard fish" (1,000 "standard fish" = 670 lb), or about 76-167 t. Snapper rig vessels have refrigerated fish holds; chilled seawater is sprayed atop the catch via baffles and recirculated through drains in the bottom of the hold.
Standard mesh size (bar length) for purse-seine gear in Chesapeake Bay is 7/8-in, which is the minimum allowed by Virginia law. During the initial decades of the snapper rig fishery, purse seines for bait were scaled-down versions of the larger nets used in the menhaden reduction fishery (which often approach 1,200 ft long and 80-90 ft deep). Bait purse seines are usually acquired as surplus nets from the reduction fishery; the bag or bunt section is moved from the middle of the net to the end, then tapered to accommodate the single purse boat method of setting the seine. As the bait fishery has evolved, dimensions of snapper rig nets now rival reduction nets in length and depth. Snapper rigs normally utilize one purse boat to set the net and employ 6 or 7 crew members, as well as a spotter pilot to locate schools of menhaden.
The menhaden purse-seine fishing season in Chesapeake Bay extends from the first Monday in May through the third Friday in November, regardless of the disposition of the catch. By choice, fishing is almost exclusively done during weekdays. Purse-seine fishing is mostly restricted to lower Chesapeake Bay proper, and is prohibited in most tributaries of the bay, except for the lower reaches of the Rappahannock and York rivers. One exception allows vessels under 70 gross tons (ostensibly bait vessels, but none in the extant snapper rig fleet qualify) to fish in a few additional tributaries of Northern Neck during the purse-seine season.
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CDFR information revealed that during 1995-2009, initial purse-seine sets for bait were made in early to mid May (Table 1); average date-of-first-set was 8 May. Final purse-seine sets for bait were made in early to mid November (Table 1); average date-of-last-set was 11 November. Assuming these mean start and finish dates, an average fishing season in the bait fishery extends about 27 weeks and consists of approximately 135 "weekday" fishing days.
Total Annual Landings
Because VMRC has no mandate to collect menhaden fishery statistics, bait landings in Virginia prior to about 1995 are somewhat suspect and may be underestimates, especially those from the snapper rig vessels. To better document landings we placed CDFR's onboard two of four bait vessels in 1995 and on two of three vessels in 1996 and 1997. From 1998 to present, all snapper rig vessels maintained CDFR's (Table 2).
Since daily trip tickets or reasonable facsimiles are not required of snapper rig vessels in Virginia, dockside measures of bait landings are unavailable. Nevertheless, summed at-sea estimates of daily purse-seine catches from CDFR's are considered reliable estimates of total daily catch because menhaden captains are particularly adept at estimating individual purse-seine catches. For example, Smith (1999) showed that for menhaden reduction vessels in Virginia, vessel-specific ratios of actual annual landings to annual CDFR estimates of catch ranged from 0.90 to 1.03 for the 20-vessel fleet in 1995. Thus, CDFR estimates of catch for the snapper rig fleet are considered reasonably accurate estimates of landings. CDFR catch estimates are couched in the vernacular of the menhaden industry, that is, in thousands of "standard fish," which were multiplied by 0.3039 to convert to metric tons (Smith, 1991).
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During the 1980's menhaden bait landings by snapper rigs were largely undocumented, but they were probably equivalent to Virginia's menhaden bait landings by all other fishing gears (mostly pound nets, gill nets, and haul seines) (Table 3). By the late 1990's menhaden bait landings by snapper rigs were five times greater than those of other gears combined. This contrast continues through present, and was most disparate in 2003 when landings by snapper rigs amounted to 20,879 t and bait by all other gears totaled 1,584 t.
Snapper rig landings for bait during 1989-92 were poorly documented, but averaged about 5,000 t annually (Table 3), probably from two or three active vessels. Beginning in the mid 1990's, landings increased and more than doubled to 11,190 t by 1995, then climbed to 17,640 t by 1998, most probably a reflection of more accurate data collection via the CDFR's. Landings declined to 12,763 t in 2000, then increased again over the next 3 years, peaking for the time series at 20,879 t in 2003. Landings in 2005 of 19,814 t rivaled those of 2003, however, landings in 2004 fell to 9,361 t, less than half of the previous year's total. By 2008, landings improved again to 13,213 t. Landings during 2007-09 averaged 12,799 t.
Snapper rig landings in Virginia contribute substantially to coastwide landings of Atlantic menhaden for bait (Table 3). During the 1990's, Virginia's snapper rig landings as a proportion of total coastwide landings of menhaden for bait grew from 11% in 1991 to 45% in 1998. No doubt much of this increase was because of better documentation of snapper rig landings. By 2003 snapper rig landings represented 62% of coastwide menhaden bait landings, although in recent years this percentage has declined to roughly 30%.
CDFR Compliance, Spotter Pilot Activity, and Fishing Days
Beginning in 1998 to the present, compliance for completing CDFR forms by snapper rig captains has been 100%, and captains provided between 318 and 482 CDFR forms annually (Table 2). Snapper rig captains utilized spotter pilots to assist them in locating fish schools and to direct setting the net for over 90% of the sets annually (Table 2). Captains of reduction vessels tend to use spotter pilots less frequently (83% of sets in the Atlantic fleet (Smith, 1999) and about 69% of sets in the Gulf fleet (Smith et al., 2002)), possibly because the larger and taller reduction vessels offer a higher vantage point to "self locate" fish schools.
Some, but not all, snapper rig captains completed CDFR's even on days when they did not fish, noting if they did not leave the dock, or that they went to sea but did not set; hence, one completed CDFR form may not equal a "trip" with sets. During 1995 to 2009 snapper rig vessels fished on average 69.2% (range: 58.1-82.7%) of the available fishing days (almost exclusively weekdays), while not leaving the dock 12.2% of available days, or not setting the net at sea on the remaining 18.6% of days. Assuming a hypothetical 135-day fishing "season" (weekdays) from early May through mid November, snapper rig vessels set on menhaden schools on about 94 (69.2%) of the available fishing days; they stayed at the dock about 16 days (12.2%) and did not set at sea on 25 days (18.6%). These estimates are comparable to the Atlantic menhaden reduction fleet which set on fish 67-83% of available fishing days (Smith, 1999), and the Gulf menhaden reduction fleet which set on fish 63-76% of the available fishing days (Smith et al., 2002).
Description of the Catch, Fishing Effort, and Disposition of the Catch
Nominal Fishing Effort, Median Catch, and Frequency Distribution of Catch
Nominal fishing effort, as reflected by number of purse-seine sets made by snapper rig vessels, ranged from 799 (2006) to 1,423 (2002) annually (Table 2). Median number of sets for bait per vessel per day was 3 or 4 sets (Table 2), which is about one less per day than vessels in the Atlantic and Gulf menhaden reduction fleets (Smith, 1999; Smith et al., 2002). Median catch size for bait ranged from 9 t (1999) to 15 t (2003) (Table 2); this is roughly half of median catch size in the Atlantic menhaden (15-30 t; Smith, 1999) and gulf menhaden (17-22 t; Smith et al., 2002) reduction fisheries. Catch-per-unit-effort for the snapper rig fleet during 1998-2009, as measured by total annual catch in metric tons divided by annual number of purse-seine sets, ranged 12-18 t/set. By comparison, CPUE's for sets by the purse-seine reduction fleet within Chesapeake Bay for the same period ranged from 22 to 31 t/set. (1)
The frequencies of catches per set by 10 t bins were calculated annually, then each bin was averaged over the 12-yr time series (1998-2009) (Table 4). Results indicated that on average 46% of sets were represented in the 0-10 t bin, while 88% of catches were represented in the first three catch intervals, that is, the 0-10, 11-20, and 21-30 t bins. By comparison, for the Atlantic menhaden reduction fishery in Chesapeake Bay about 30% of the sets accumulated in the 0-10 t interval, and about 80% of the catch occurred in the 0-10, 11-20, and 21-30 t bins (Smith, 1999).
Set Duration and Hour of Peak Catch
Average set duration, as measured by the time when the purse boat began setting the net until the time when the entire catch was pumped into the fish hold, varied narrowly over the period. Mean set time ranged from 36 to 47 min, and averaged 39 min over the entire time series; these values are equivalent to set times in the Atlantic menhaden reduction fishery (34-43 min; Smith, 1999), and slightly less than set times in the Gulf menhaden reduction fishery (41-48 min; Smith et al., 2002). On average, sets just after sunrise produced the best catches. Hourly mean catches were highest between 0600-0759 hr for 10 of the 12 analysis years (1998-2009).
Temporal and Areal Trends in Bait Catches
To discern seasonality of the bait catch, annual catches were summed by month, then averaged across fishing years 1998-2009 (Table 5). Peak removals occurred in August (3,401 t) and accounted for 22% of the annual harvest. Catches in July (3,089 t) closely followed those of August and represented 20% of the annual removals. Catches in June (2,469 t; 16%), September (2,321 t; 15%), and October (2,275 t; 15%) were similar and combined comprised 46% of the annual harvest. Catches in May (1,462 t) represented 9% of the total removals; however, on given years when presumably spring weather was fair and fish were abundant, removals in May (2005 when 2,539 t were caught) rivaled mean catches for June and July. Catches in November (418 t) amounted to only 3% of the total removals for the fishing season.
The CDFR Program for the reduction fishery was originally designed in the late 1970's as a joint state, Federal, and menhaden industry effort to provide better information on menhaden catch locations and fishing effort (Smith, 1999). The program obviously predates GPS navigation systems, as well as later versions of LORAN; nevertheless, GPS coordinates for purse-seine sets have been available since 2005.
For pre 2005 catch locations, program designers found it convenient to use a combination line-of-sight locales (tied to nearest geographic points) and distance-from-shore estimates. A catalog of fishing locations was adapted from a menhaden processor at Reedville (Standard Products of Virginia (2)). Individual fishing locations were subsumed into a larger grid of seven areas in the Virginia portion of Chesapeake Bay (Fig. 2). These areas have proven useful for describing trends of reduction catches in the bay (Smith, 1999) and are also used here.
For summary purposes lower Chesapeake Bay is divided into seven areas; a line running roughly from north to south at the center of the bay separates three paired east-west areas, and one area encompasses the southernmost portion of Virginia's Tidewater region (Fig. 2). Smith Point and Rappahannock River areas on the bay's western shore are nearest to the ports where snapper rig vessels are located, while the Pocomoke area is nearest along the eastern shore of the bay.
Annual catches in Chesapeake Bay were summed by fishing area, and then averaged across fishing years 1998-2009 (Table 6). A majority of catches over the time series occurred in the Smith Point area, the area closest to Reedville and the home port for most of the snapper rig fleet. Annual removals from this area averaged 9,564 t, and represented 62% of the annual catch.
The Rappahannock River area ranked second in terms of annual removals with an annual catch of 2,719 t, representing 18% of the harvest. The Pocomoke area ranked a close third where annual catch averaged 2,575 t, or 17% of the total catch. The Smith Point, Pocomoke, and Rappahannock River areas combined accounted for 97% of the bait removals by snapper rigs from the bay.
By comparison, these three areas accounted for 59% of the removals in Chesapeake Bay by the reduction fleet (Smith, 1999), which is composed of larger vessels that range farther and for longer periods of time in Chesapeake Bay and ocean waters than the snapper rig fleet. Snapper vessels rarely set beyond Chesapeake Bay because ocean waters are often too rough for the smaller bait boats, and because of the distance to the bay mouth (3-4 hr one way). A few sets along the ocean beaches of Virginia's Eastern Shore barrier islands in 2006 were an exception.
CDFR's also document menhaden for bait catches by distance from the shoreline. Annual catches by snapper rig vessels were summed by distance intervals from shore, then averaged across all fishing years. Catches in the fishing stratum >3.0 mi from shore dominated (43%) annual catches of Atlantic menhaden for bait, followed by the stratum 2.1-3 mi from shore (22%). The near-shore strata, [less than or equal to]1 mi (17%) and 1.1-2 mi (18%) from shore were nearly equivalent and combined represent 35% of the catch by distance from shore. A similar trend was observed in the reduction fishery for menhaden as 47% of the catch occurred beyond three miles from shore in Chesapeake Bay (Smith, 1999).
Since 2005, captains of snapper rig vessels have provided GPS coordinates of their purse-seine set location on CDFR forms. Locations of individual purse-seine sets for bait and the corresponding catch magnitudes for 2005, which are typical of 2006-09 also, are shown in Figure 9. Obviously, catches and effort are concentrated in the upper half of the Virginia portion of Chesapeake Bay.
Age and Size Composition of the Catch
Port samples acquired from menhaden bait purse-seine vessels in Chesapeake Bay over the 15-yr time series (1995-2009) revealed up to seven age classes in the catch, although only three of these were of major importance to the fishery (Table 7). Age-2 fish predominated in the catch, and on average accounted for 58.4% of the catch. Age-3 menhaden (23.7%) ranked a distant second in terms of numbers in the bait catch, although on one rare occasion (2002) they comprised a majority (55.5%) of the catch. Age-1 fish (12.5%) ranked third in importance, yet during given years they comprised up to 30-35% of the catch. Overall, age-1, -2, and -3 Atlantic menhaden accounted for almost 95% of the snapper rig catch. Mean fork lengths (mm) and weights (g) of Atlantic menhaden in the bait landings by year and age are shown in Tables 8 and 9, respectively.
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Similarly, the age composition of the catch of the reduction fishery (1995-2009) (3) is also comprised of age-0 through age-6 Atlantic menhaden, with mean catch over the period dominated by age-1 (20.4%) and age-2 (61.1%) categories. However, the bait fishery in Chesapeake Bay tends to harvest a slightly greater proportion of older, and presumably larger, menhaden; for example, the proportion of age-3 and age-4 fish in the bait fishery averaged 23.7% and 4.6%, respectively, whereas the same age classes in the reduction fishery averaged 15.1% and 2.5%, respectively.
Markets for Menhaden as Bait
We interviewed several wholesalers of menhaden for bait in Tidewater Virginia concerning outlets for their product. A consensus of responses indicated that a majority of menhaden landed for bait in Virginia is sold to blue crab pot fishermen in Virginia, Maryland, and the Carolinas. Smaller amounts are shipped to the U.S. Gulf coast for blue crab bait and seasonally for crawfish, Procambarus clarkia, bait. Minor amounts of menhaden bait from Virginia are sold in New England for lobster bait; lobster fishermen in New England prefer larger individual menhaden for their bait wells or bags; larger and older Atlantic menhaden are more readily available to bait fishing operations in New Jersey.
Limited amounts of menhaden landed for bait in Virginia are sold to sport fishermen for cut bait or chum; small quantities are also ground into a frozen chum product and marketed to anglers. When bait markets are "soft," that is, the markets are glutted with landings, or when menhaden in the catch are too small for the bait markets, snapper rig vessels will unload their catch at the menhaden factory in Reedville where it is reduced to fish meal and fish oil.
Bait dealers in Virginia blast freeze menhaden, then pack frozen fish in 50-lb cardboard flats. Fresh menhaden for bait is also sold in 65-lb bushel baskets. The practice of packing menhaden for bait in 100-lb wooden crates, or "fish boxes," has fallen from favor and is a rarity among contemporary bait wholesalers in Virginia.
Summary and Epilogue
Over the past 4 decades, the menhaden snapper rig fishery in the Virginia portion of Chesapeake Bay has become a major contributor to the bait landings on the U.S. East coast, and on given years represented over 50% of coastwide menhaden landings for bait. Menhaden landings by snapper rigs in Virginia are widely distributed to bait markets for blue crab fisheries in Chesapeake Bay, the Carolinas, and the U.S. Gulf coast. New vessels entering into the fishery in recent years attest to its vitality.
Recent bait-related management decisions in New England and New Jersey could have significant near-term implications for Virginia's snapper-rig fishery. Atlantic herring, Clupea harengus harengus, is one of the preferred baits for lobster pots in New England. For fishing years 2010-12, the New England Fishery Management Council (NEFMC) proposed reducing annual Atlantic herring catch quotas to about 106,000 t, down from about 194,000 t in 2009 (Federal Register, 2010). By some estimates (The Free Press, 2010) in 2010 the state of Maine alone would need to import 20,000 t of menhaden for lobster bait to offset the shortfall in herring bait.
In a related event in 2010, New Jersey moved to limit entry into its purse-seine fishery for bait (Cape May County Herald, 2010), fearing an influx of bait vessels from New England into Garden State waters. While heretofore only minor amounts of bait from Virginia reportedly enter New England bait markets, recent actions by the NEFMC and New Jersey suggest that landings of menhaden for bait in Virginia could become an even more important facet of bait landings for the U.S. East coast in the near future.
We wish to thank the captains of Virginia's snapper rig fleet for assiduously completing CDFR logbook forms beginning in the mid 1990's, even before compliance was made mandatory in 2001. Many individuals harvesting and handling menhaden for bait shared their knowledge of the bait fishery, especially Captains Fredrick Rodgers and Jimmy Kellum, and also Margaret Bevans Ransome of Bevans Oyster Co. At the NMFS Beaufort Laboratory, Ethel Hall "aged" port samples from the bait fishery, and James Waters, Michael Burton, and Patti Marraro reviewed initial drafts of the manuscript. Peter Himchak, Brandon Muffley, and Jeff Brust of the New Jersey Division of Fish and Wildlife compiled annual coastwide landings of menhaden for bait.
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The authors are with the Beaufort Laboratory, National Marine Fisheries Service, NOAA, 101 Pivers Island Road, Beaufort, NC 28516 (corresponding author: email@example.com).
(1) Unpublished data on file at NMFS Beaufort Laboratory.
(2) Mention of trade names or commercial firms does not imply endorsement by the National Marine Fisheries Service, NOAA.
(3) Unpublished data on file at NMFS Beaufort Laboratory.
Table 1.--First and last fishing days of Virginia's menhaden "snapper rig" bait fishery, 1995-2009. Year First fishing day Last fishing day 1995 May 4 Nov. 13 1996 May 20 Nov. 13 1997 May 5 Nov. 11 1998 May 6 Nov. 9 1999 May 7 Nov. 10 2000 May 1 Nov. 8 2001 May 8 Nov. 14 2002 May 6 Nov. 2 2003 May 20 Nov. 17 2004 May 6 Nov. 2 2005 May 2 Nov. 15 2006 May 9 Nov. 15 2007 May 11 Nov. 12 2008 May 5 Nov. 11 2009 May 11 Nov. 10 Table 2.--Virginia menhaden "snapper rig" fleet: Number of vessels, CDFR's, days with at least one set, number of sets, median catch, sets-day-vessel, and percent of spotter pilot-assisted sets during 1998-2009. Days with Vessels No. of [greater than or Total no. Year reporting CDFR's equal to] 1 set of sets 1998 5 327 271 1,016 1999 5 438 345 1,420 2000 5 402 270 1,084 2001 4 384 341 1,242 2002 4 399 360 1,423 2003 4 399 337 1,195 2004 4 466 345 1,303 2005 4 482 369 1,399 2006 4 369 235 799 2007 3 318 258 860 2008 3 319 251 857 2009 4 340 247 860 Sets/vessel/day Spotter Median catch (t) assisted Year for all vessels Median Max sets (%) 1998 11 3 10 95 1999 9 4 10 92 2000 11 3 8 93 2001 12 3 9 93 2002 11 4 9 99 2003 15 3 10 92 2004 12 3 10 90 2005 12 3 8 96 2006 11 3 8 92 2007 12 3 8 97 2008 14 3 8 99 2009 12 3 9 99 Table 3.--Virginia landings in metric tons of Atlantic menhaden for bait by "snapper rigs," all other gears, and state totals, as well as coastwide Atlantic menhaden for bait landings, 1981-2009. Virginia menhaden catch by Total (1) "snapper Virginia Total Atlantic rigs" (% of menhaden Virginia coast coastwide catch for menhaden menhaden landings for bait, all catch for catch for Year bait) other gears bait bait 1981 4,405 9,734 14,139 1982 9,988 9,988 1983 11,105 11,105 1984 6,589 6,589 1985 7,856 7,856 26,659 1986 4,484 4,484 27,961 1987 6,495 6,495 30,616 1988 5,433 5,433 36,237 1989 5,778 (19) 5,249 11,027 30,948 1990 5,495 (18) 2,772 8,266 30,685 1991 3,906 (11) 2,665 6,571 36,224 1992 5,065 (13) 2,299 7,364 38,721 1993 8,019 (19) 3,257 11,276 41,889 1994 10,978 (29) 2,570 13,547 37,369 1995 11,190 (26) 2,792 13,982 42,525 1996 11,994 (33) 2,449 14,443 36,735 1997 10,590 (26) 2,396 12,985 41,451 1998 17,640 (45) 1,809 19,449 39,194 1999 15,521 (43) 2,276 17,797 36,094 2000 12,763 (36) 2,861 15,624 35,050 2001 17,464 (48) 1,960 19,424 36,312 2002 18,957 (51) 1,762 20,719 36,834 2003 20,879 (62) 1,584 22,463 33,880 2004 17,740 (50) 2,802 20,542 35,515 2005 19,814 (51) 2,320 22,134 38,832 2006 9,361 (36) 1,693 11,054 26,311 2007 12,445 (29) 3,759 16,204 42,668 2008 13,213 (28) 3,254 16,467 46,674 2009 (2) 12,740 (33) 2,507 15,247 38,976 (1) Source: ASMFC (2010) for data through 2008. (2) Data are preliminary Table 4.--Frequency distribution of sets for Atlantic menhaden by Virginia "snapper rig" vessels by 10 t bins (bins are defined by their midpoints) averaged over 12 years, 1998-2009. Bin Mean midpoint no. of Cumulative Cumulative (t/set) sets no. of sets % 5 521 521 46 15 343 864 77 25 123 987 88 35 85 1,072 96 45 24 1,096 98 55 13 1,109 99 65 9 1,118 99 75 2 1,120 99 [greater than or equal to] 85 1 1,121 100 Table 5.--Virginia "snapper rig" vessels: Mean catch by month averaged over 12 years, 1998-2009, with percent and minimum and maximum values. Percent Mean of annual Minimum Maximum Month catch (t) mean catch catch (t) catch (t) May 1,462 9 803 2,539 June 2,469 16 1,311 3,660 July 3,089 20 1,916 4,025 Aug. 3,401 22 1,580 5,499 Sept. 2,321 15 1,186 3,553 Oct. 2,275 15 1,181 3,870 Nov. 418 3 17 849 Table 6.--Virginia "snapper rig" vessels: Mean catch by fishing area averaged over 12 years, 1998-2009, with percent, minimum, and maximum values. Mean % of annual Minimum Maximum Area catch (t) mean catch catch (t) catch (t) Smith Point 9,564 62 6,593 13,518 Pocomoke 2,575 17 593 4,630 Rappahannock River 2,719 18 359 4,566 Silver Beach 331 2 0 1,655 York River 50 <1 0 258 Cape Charles 170 1 0 579 Ocean View 26 <1 0 202 Table 7.--Percent age composition of Atlantic menhaden in the Virginia bait purse-seine catch by year, 1995-2009. Total no. Year Age-0 Age-1 Age-2 Age-3 Age-4 Age-5 Age-6 sampled 1995 0 35.4 35.4 27.1 2.1 0 0 96 1996 0 0.0 76.6 19.7 3.7 0 0 137 1997 0 9.6 44.8 34.6 8.8 1.5 0.7 136 1998 0 5.3 52.5 27.7 12.8 1.4 0.3 282 1999 0 4.0 72.2 17.7 5.4 0.7 0 299 2000 0.9 23.8 63.2 12.1 0 0 0 231 2001 0.4 4.4 68.0 25.5 1.4 0.3 0 275 2002 0 1.3 20.4 55.5 20.4 2.4 0 470 2003 0.6 9.4 75.4 13.3 1.3 0 0 309 2004 0 6.4 73.6 16.6 3.1 0.3 0 326 2005 0 0.6 51.9 44.7 2.5 0.3 0 318 2006 0 29.5 47.3 20.7 2.5 0 0 203 2007 0 27.5 68.7 2.7 1.1 0 0 374 2008 0 3.5 86.9 7.9 1.3 0.3 0 314 2009 0.2 27 39.3 30.4 3.1 0 0 481 Mean 0.1 12.5 58.4 23.7 4.6 0.5 0.1 Table 8.--Mean fork length (mm) of Atlantic menhaden in the Virginia bait purse-seine catch by age and year, 1995-2009. Year Age-0 Age-1 Age-2 Age-3 Age-4 Age-5 Age-6 1995 178 244 271 290 1996 259 291 300 1997 179 247 276 296 302 313 1998 158 233 285 308 317 317 1999 201 225 270 291 310 2000 144 193 257 276 2001 150 173 260 291 323 312 2002 189 247 278 288 271 2003 148 220 243 286 311 2004 191 233 261 295 297 2005 210 253 278 291 299 2006 202 242 274 300 2007 189 225 274 289 2008 205 240 259 290 300 2009 152 193 238 268 279 Mean 149 192 243 276 297 301 315 Table 9.--Mean weight (g) of Atlantic menhaden in the Virginia bait purse-seine catch by age and year, 1995-2009. Year Age-0 Age-1 Age-2 Age-3 Age-4 Age-5 Age-6 1995 92 252 335 417 1996 317 445 464 1997 108 270 370 463 472 531 1998 70 237 431 553 558 579 1999 142 199 343 430 519 2000 49 136 300 362 2001 59 93 309 429 573 564 2002 129 274 380 429 333 2003 56 223 281 469 593 2004 128 221 317 434 410 2005 154 279 360 402 453 2006 142 245 341 468 2007 115 191 319 358 2008 152 233 290 399 421 2009 60 122 227 311 339 Mean 56 129 256 367 452 466 555
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|Author:||Smith, Joseph W.; OBier, W. Bradley|
|Publication:||Marine Fisheries Review|
|Date:||Jan 1, 2011|
|Previous Article:||Papers in the Marine Fisheries Review 72(1-4), 2010.|
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