Lepeophtheirus.sp: Sea Louse–The Race Rocks Taxonomy

parasite

Close up of parasitic sea lice on the head of a ling cod. Photos  by Dr. Armand Svoboda

lepeophtherius sp.

Lepeophtheirus.sp: Sea Louse-on the head of a ling cod — photo by Dr. A. Svoboda

Domain Eukarya
Kingdom Animalia
Phylum Arthropoda
Suphylum Crustacea
Class Maxillopoda
Order Siphonostomatoida
Family Caliguidae
Genus Lepeophtheirus
Species sp.
Common Name: Parasitic copepod

Other Members of the Phylum Arthropoda at Race Rocks.

taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams. Garry Fletcher

 

Ophiodon elongatus: Ling Cod-The Race Rocks Taxonomy


LIFE HISTORY:

Spawning takes place from December to March .Females deposit their eggs in a mass under the rocks in shallow water .The eggs vary around 3.5 millimeters in diameter when water hardened and have a tough membranous shell.The newly hatched young are 7 to 10 millimeters long and have blue eyes.The yolk sac is absorbed in about 10 days .After a few weeks growth, the young fish are attracted to lights at night .Females reach 1 meter at 10 to 14 years .Male seldom exceed 1 meter in 12 years.Newly maturing females produces (60,000)100,000 to 150,000 eggs. Large females may produce as many as 500,000 eggs.

HART, J.L, Pacific Fishes of Canada, FISHERIES RESEARCH BOARD OF CANADA. Ottawa, 1973

IMPORTANT NOTES:

-Lingcod have been over fished in British Columbia to the extent that there is now a closure on the fishing .They have been protected at Race Rocks since the fishing closure in 1990 .Divers see them frequently in water 6 to 12 meters depth.Their eggs masses appear on vertical rock walls in protected niches the adult fish patrols and defends the egg mass from predators. It will attack divers during incubation period in January and February.

 

LING COD CONSERVATION

Report from the Vancouver Aquarium on Link Cod Egg mass surveys. http://www.vanaqua.org/lingcodsurvey/

From DFO press July, 2002: “Lingcod Conservation Measures Strengthened”

VANCOUVER, BRITISH COLUMBIA–Fisheries and Oceans Canada announced today the expansion of management measures in the recreational fishery for the protection of lingcod in the Strait of Georgia.

A 2001 Pacific Scientific Advice Review Committee (PSARC) report on lingcod confirmed that, despite a variety of conservation measures in recent years, lingcod stocks in the Strait of Georgia remain at low levels. Fisheries and Oceans Canada had delayed opening the Strait of Georgia recreational lingcod fishery pending further analysis of the PSARC information and review of additional material received from the recreational community.

After careful consideration of all the information, the Department has decided to maintain the recreational closure for lingcod fishing in the Strait of Georgia (Areas 13 to 19, and Areas 28 and 29). If a lingcod is incidentally caught in these Areas, it should then be immediately released back into the water. The recreational lingcod fishery will continue in the North Coast and on the West Coast of Vancouver Island. Harvest by First Nations for food, social and ceremonial purposes will continue in the Strait of Georgia. The impact of this fishery is small.

Since 1990, the commercial lingcod fishery in the Strait of Georgia has been closed. In the recreational fishery, management measures have included an eight month winter closure (October to May) to protect nest guarding males, a size limit restriction (to allow a fish to reproduce prior to harvest), and daily and annual catch limits. However, until a sustained improvement is noted for these stocks of concern, the Department feels that additional measures are required.

Like rockfish, lingcod are believed to be fairly sedentary, livingmost of their lives in the same rocky area or subtidal reef. However, unlike rockfish, the mortality of lingcod in catch-and-release fisheries is low (less than 10 per cent).

As an important component of both the recreational and commercial groundfish fisheries, lingcod are also expected to benefit from the inshore rockfish conservation strategy that is being developedand implemented. Inshore rockfish conservation measures, such as fishing restrictions in selected areas on the coast, will assist with protecting and rebuilding both inshore rockfish and lingcod stocks. In addition, a stock assessment framework for lingcod will be developed, which will further our understanding of lingcod and their distribution.

Fisheries and Oceans Canada has made a commitment to ensure the sustainability of British Columbia’s inshore rockfish and lingcod fisheries for the benefit of Canadians today and in the future. With the cooperation of all harvesters, lingcod and inshore rockfish stocks can be protected and rebuilt.

FOR FURTHER INFORMATION CONTACT:
Fisheries and Oceans Canada, Pacific Region

FISH BASE reference

Dec-2002- Fariba Hussaini, (PC yr 29)

CLASSIFICATION
Domain Eukarya
Kingdom Animalia
Phylum Chordata
Class Actinopterigii
Order Scorpaeniformes
Family Hexagrammidae
Subfamily Ophiodontinae
Genus Ophiodon
Species elongatus
Common Name: Lingcod

Recreational lingcod fishing prohibited in Strait of Juan de Fuca

Saturday, June 01, 2002
Good Morning WEATHER: Sky Cloudy  Vis. 12 Miles  Wind West 11 Knots Rippled
Good Evening
TEMPERATURE: Max. 13.0 C  Min. 8.1 C Reset 10.0
MARINE LIFE: Another beautiful day here, with quite a lot of marine activity. The Glaucous Winged Gulls are actively mating and nesting, being very defensive of their nests. Crows are harassing the Gulls, Oystercatchers and and Pigeon Guillemots, in search of an unattended nest and egg. One of the pairs of Canadian Geese on the Island are nursing their five young Goslings, despite the Goslings rapidly increasing size the Geese continue to be very protective of their youngsters. Divers spotted some large Ling Cod** around the docks, along with a healthy stock of smaller fish.
HUMAN INTERACTION: A lot of fishing activity around the reserve today, around 10 to 12 vesels on the reserve boarder actively fishing. Problems with both vessels motoring too quickly through the reserve and fishermen disregarding the reserve limitations and fishing around West Race rocks. Four eco-tourism vessels moved through the park today.
**Good news for the Ling Cod!! This note was just received from the Sierra Club:
June 1, 2002 Victoria, BC: Despite intense pressure from sports-fishery lobbyists, local Fisheries and Oceans managers have decided that this year’s recreational fishery for lingcod in the Strait of Georgia will not go ahead today as scheduled. In an unprecedented, last-minute move, regional Fisheries and Oceans officials decided late Friday to issue a variation order to the B.C. tidal waters recreational fishery regulations, to prevent the recreational fishery for lingcod from proceeding. In an unprecedented, last-minute move, regional Fisheries and Oceans officials decided late Friday to issue a variation order to the B.C. tidal waters recreational fishery regulations, to prevent the recreational fishery for lingcod from proceeding. The lingcod season, which would have run from today to September 30, would have allowed anglers a daily bag limit of one lingcod, a possession limit of two, and an annual limit of 10.
The commercial harvest of Strait of Georgia lingcod was banned in 1990, after commercial landings had steadily declined to 44 tonnes after a peak catch of 3,300 tonnes in the 1930s. Fisheries and Oceans scientists estimate that only five per cent of the 1950s-era lingcod biomass is left in the Strait of Georgia. Against the advice of federal fisheries scientists, the recreational lingcod fishery was allowed to continue, however, and by 2001 the sports catch was believed to result in an annual harvest of at least 30 tonnes. Friday’s decision to suspend the fishery will prohibit recreational lingcod fishing throughout Johnstone Strait, the entire Strait of Georgia area, and most of Juan de Fuca Strait.
“We believe that the vast majority of anglers will support this decision,” said Terry Glavin, fisheries adviser to the Sierra Club. “While we are encouraged by reports that there may be localized revivals in lingcod stocks, a full closure is the only hope that these precious fish will gain the time they need to recover to their former abundance.”posted by at 5:49 AM