scholarly journals Interannual variability in density, timing and survival of Alaskan red king crab Paralithodes camtschatica larvae

1989 ◽  
Vol 54 ◽  
pp. 51-59 ◽  
Author(s):  
SM Shirley ◽  
TC Shirley
Keyword(s):  
Interannual Variability ◽  
Red King Crab ◽  
King Crab ◽  
Paralithodes Camtschatica

Infestation by Brood Symbionts and Their Impact on Egg Mortality of the Red King Crab, Paralithodes camtschatica, in Alaska: Geographic and Temporal Variation

1991 ◽  
Vol 48 (4) ◽  
pp. 559-568 ◽  
Author(s):  
Armand M. Kuris ◽  
S. Forrest Blau ◽  
A. J. Paul ◽  
Jeffrey D. Shields ◽  
Daniel E. Wickham
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Temporal Variation ◽  
Seasonal Pattern ◽  
Red King Crab ◽  
King Crab ◽  
Egg Masses ◽  
Egg Mortality ◽  
Paralithodes Camtschatica

Egg masses of 772 red king crab, Paralithodes camtschatica, were sampled to determine the prevalence, intensity, and patterns of cooccurrence of brood symbionts from 28 Alaskan localities. Carcinonemertes regicides and three other undescribed nemertean egg predators were recovered from many localities, as were an undescribed turbellarian and an amphipod, Ischyrocerus sp. A widespread outbreak of nemerteans occurred in the 1983–84 and 1984–85 red king crab brooding seasons. At some locations, nearly all of the eggs were consumed in the 1983–84 brood season. Feeding of C. regicides on eggs was documented in vitro and these worms caused substantial egg mortality at many locations. The amphipod was also an egg predator and may have had a significant impact at three locations. The turbellarian did not kill eggs. From the seasonal pattern of C. regicides infestation at Kachemak Bay, we postulate an abbreviated life cycle and autoinfection for C. regicides. Such life history features may have contributed to the peak intensities observed late in the 1983–84 and 1984–85 brooding seasons. At some localities, heavy brood mortality may reduce or eliminate recruitment of some year classes to the fishery.

Behavioral Ecology of Podding Red King Crab, Paralithodes camtschatica

1990 ◽  
Vol 47 (10) ◽  
pp. 1944-1958 ◽  
Author(s):  
C. Braxton Dew
Keyword(s):  
Behavioral Ecology ◽  
Diel Activity ◽  
Red King Crab ◽  
Probability Models ◽  
Sea Stars ◽  
Homing Behavior ◽  
King Crab ◽  
Frequency Distributions ◽  
Nocturnal Foraging ◽  
Paralithodes Camtschatica

Diel activity cycles and foraging dynamics for two pods of 500–800 juvenile red king crab, Paralithodes camtschatica, were monitored for 196 d. (Nov. 1987–June 1988) and 148 d. (Oct. 1988–Feb. 1989) in Womans Bay, Kodiak, Alaska, using SCUBA. Nocturnal foraging and homing behavior of podding red king crab were documented for the first time. Variation in time of pod dispersal into a nightly foraging aggregation was explained (R2 = 0.72) by changes in water temperature, crab weight, and time of sunset. A trend of increased foraging time and movement to deeper, cooler water was apparent after mid-April, as water temperatures reached 4 °C and began a sustained summer increase. Molting occurred only at night, and seasonal variations in molting rate were estimated using molting probability models based on length-frequency distributions. Average pod movement was counter to the direction of strongest water currents, and homing behavior suggested some affinity for a low-light environment in man-made niches. Items most frequently eaten were sea stars (Evasterias troschelii) and macrophytes (Laminaria sp. and Ulva sp.). I discuss the inception of podding as a discontinuity in behavior, perhaps reflecting a break in the fractal continuum of niche availability within red king crab habitat.

Temperature-Dependent Growth of Juvenile Red King Crab (Paralithodes camtschatica) and its Effects on Size-at-Age and Subsequent Recruitment in the Eastern Bering Sea

1990 ◽  
Vol 47 (7) ◽  
pp. 1307-1317 ◽  
Author(s):  
Bradley G. Stevens
Keyword(s):  
Bering Sea ◽  
Published Data ◽  
Red King Crab ◽  
Sea Temperature ◽  
King Crab ◽  
Recruitment Failure ◽  
Eastern Bering Sea ◽  
Paralithodes Camtschatica ◽  
Size Interval ◽  
Size At Age

A temperature-based growth relationship was derived for juvenile red king crab (Paralithodes camtschatica) from published data. Growth of annual cohorts of crab was simulated at various locations in Bristol Bay, AK, using long-term water temperature observations, and the resulting mean sizes were compared with those observed by the annual National Marine Fisheries Service eastern Bering Sea crab survey. Results indicate that mean age-at-recruitment is 3–5 yr greater than previously estimated, and has decreased from 9.5 to 7.5 yr over the past decade as a result of increasing sea temperature. Single year-classes require 3–5 yr for complete recruitment to the 'mature' size interval, and recruitment in any year may consist of crabs from four to five year-classes. The high landings and subsequent crash of the Bering Sea red king crab population during the late 1970's probably originated from one or more adjacent strong year-classes in the late 1960's which recruited over a period of several years, followed by a period of recruitment failure and high mortality. Future stock–recruitment studies should account for the effects of multi-year recruitment and year-class overlap.

Carcinonemertes regicides n.sp. (Nemertea), a symbiotic egg predator from the red king crab, Paralithodes camtschatica (Decapoda: Anomura), in Alaska

1989 ◽  
Vol 67 (4) ◽  
pp. 923-930 ◽  
Author(s):  
Jeffrey D. Shields ◽  
Daniel E. Wickham ◽  
Armand M. Kuris
Keyword(s):  
New Species ◽  
Decapod Crustacean ◽  
Red King Crab ◽  
Symbiotic Relationship ◽  
Adult Size ◽  
King Crab ◽  
Flame Cell ◽  
Cell Pattern ◽  
The Family ◽  
Paralithodes Camtschatica

A symbiotic nemertean worm, Carcinonemertes regicides n.sp., found on red king crabs, Paralithodes camtschatica, is described and compared with other members of the genus Carcinonemertes. The family Carcinonemertidae Humes, 1942 is emended to include this species and to include known but as yet undescribed members. The following familial characters are considered diagnostic: (i) symbiotic relationship with a decapod crustacean, (ii) short proboscis, (iii) absence of cerebral organs, (iv) presence of Takakura's duct, and (v) a hoplonemertean larva. The new species of Carcinonemertes has a relatively large basis and stylet, a large anterior proboscis chamber, and a newly described flame cell pattern of 2[(1 + 1 + 1 + 1)]. In addition, at maturity it is the smallest member of the genus (typical adult size is 2.0 mm in length), and female worms bear ovarian pores before oviposition. The above characters distinguish this species from others in the genus.

Phosphatases and phosphodiesterases isolated from the red king crab (Paralithodes camtschatica) hepatopancreas

2008 ◽  
Vol 44 (1) ◽  
pp. 93-97 ◽  
Author(s):  
N. I. Menzorova ◽  
A. D. Ivleva ◽  
Yu. T. Sibirtsev ◽  
V. A. Rasskazov
Keyword(s):  
Red King Crab ◽  
King Crab ◽  
Paralithodes Camtschatica

Ribonuclease from the hepatopancreas of the red king crab Paralithodes camtschatica

2009 ◽  
Vol 45 (4) ◽  
pp. 369-373 ◽  
Author(s):  
N. I. Menzorova ◽  
Ju. T. Sibirtsev ◽  
V. A. Rasskazov
Keyword(s):  
Red King Crab ◽  
King Crab ◽  
Paralithodes Camtschatica
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