Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach

first_imgIn anticipation of the development of a new fishery for the ommastrephid squid Martialia hyadesi in the Scotia Sea, this paper presents a revision of annual consumption of the species by higher predators and provides a brief review of information about the life cycle and distribution of the species obtained from research fishing and commercial catches. This species is eaten by seals, whales and seabirds, the latter being the most reliable source of consumption data because comprehensive sampling can be carried out during their breeding seasons. A conservative estimate for total annual consumption of M. hyadesi by higher predators in the Scotia Sea is 245 000 tonnes, with an upper estimate of 550 000 tonnes if less reliable data are included. M. hyadesi spawns between autumn and mid-summer with peak hatching in winter/spring. Its life span has not been established. Data from the CCAMLR Convention Area suggest that M. hyadesi may live for two years, but this may vary. In common with other ommastrephids, the species is probably semelparous. It is proposed that the timing and catches of the fishery should be highly conservative and set taking into account the timing of breeding and consumption rates of the most sensitive of the dependent species. Most Antarctic predators which have been studied consume relatively small and immature specimens of M. hyadesi. Fishing for M. hyadesi after the chick-rearing period of the most sensitive predator (grey-headed albatross) would minimise competition locally and ensure that the fishery only exploited the stock after escapement from most higher predator species. It would also allow seabird predation of the stock to be monitored prior to the fishing season as a way of assessing numbers of pre-recruits. Closing the fishery before recruitment of the next generation of squid would ensure availability of prey to higher predators during the following chick-rearing period. Preliminary data from a squid jigger which undertook research fishing around South Georgia in June 1996 provided the basis for determining realistic potential catch rates.last_img read more

SU backup centers Witherspoon, Day look to fix struggles

first_imgSophomore center Briana Day has been one of Syracuse’s most consistent players this season. Her 10.4 rebounds per game are second in the conference. Her 46 blocks are best on the team.The only problem is that she can’t be counted on when she’s not in the game, and SU hasn’t found a backup center to fill the void when Day gets into foul trouble. Bria Day, her twin sister, and Amber Witherspoon have been brought off the bench in her place, but neither one has come anywhere close to providing a similar spark.“What you want to do is contribute and help the team win and when you’re not doing that, it’s challenging,” Bria Day said. “… I don’t want to go in and it not be the same level where it’s like I’m not helping my team, but hurting them.”And on a guard-heavy team, a drop-off in play in the paint could be devastating for the No. 25 Orange (11-5, 1-2 Atlantic Coast). Briana Day committed four fouls in a game just three times in 13 nonconference games. Yet in three ACC games against bigger, more skilled centers, she’s already been one foul from leaving the game twice and totaled three fouls in the other conference game. As a result, she’s averaging just 24.9 minutes per game this season. Neither Bria Day nor Witherspoon has been able to pick up the slack. In ACC play, the duo has combined for 2.3 turnovers and 2.3 rebounds in 11 minutes per game, putting a greater importance on Briana Day to stay out of foul trouble.AdvertisementThis is placeholder text“She has to (stay out of foul trouble) for us to be able to win,” SU head coach Quentin Hillsman said. “We play with four guards. She’s our only post player in there.”When Briana Day picked up her fourth foul against then-No. 4 Notre Dame on Jan. 4, the wheels fell off for the Orange. With 17 minutes to go in the game and SU down by five, she subbed out for seven minutes. In that time, the Fighting Irish stretched the lead to 12 points against the reserves with five layups in the paint.At one point, Hillsman even played 6-foot Taylor Ford, who has the third-most 3-point attempts on the team, at center. While he was going for a smaller lineup, it reflected SU’s struggle to find a reliable option to fill in for Briana Day. “If there’s a drop-off, I’m not playing my role correctly,” Witherspoon said.Instead of risking it with the backups four days later, Hillsman played Briana Day for the entire second half against then-No. 13 Duke after giving her just eight minutes in the first. At halftime, SU trailed by eight, but it came back and eventually tied the game with under a minute left in 74-72 loss.On a team that’s 0-5 against ranked opponents, and in a conference with six of them, backup center is a position that Syracuse can’t afford to continue struggling at.“Trying not to have a drop off is difficult because it’s like you have to go in and play to a certain level and standard,” Bria Day said. “I think that kind of motivates me to continue to work hard” Comments Published on January 13, 2015 at 12:05 am Contact Paul: [email protected] | @pschweds Facebook Twitter Google+last_img read more

Injury worries for Arsenal manager ahead of Reds clash

first_imgThe trio will be given until tomorrow to prove their fitness.Laurent Koscielny is definitely out.Both the Merseysiders and the Gunners have been inconsistent this season and John Giles says they suffer similar problems.last_img