Commensalism between a liparid fish, Careproctus sp., and the lithodid box crab, Lopholithodes foraminatus

1973 ◽  
Vol 51 (5) ◽  
pp. 555-556 ◽  
Author(s):  
Alex E. Peden ◽  
Cathryn A. Corbett
Keyword(s):  
British Columbia ◽  
Host Specificity ◽  
Fish Eggs ◽  
Gill Cavity ◽  
Paralithodes Camtschatica

Fish eggs containing Careproctus embryos were found in the gill cavity of Lopholithodes foraminatus caught off British Columbia. Because the gills were collapsed and displaced, thus implying impaired respiration for the crab, we consider this fish–crab association to be commensal rather than symbiotic. The embryos are probably those of C. melanurus. Because of previous reports of other Careproctus sp. depositing eggs in king crabs (Paralithodes camtschatica), further investigations to indicate the host specificity of this liparid–lithodid relationship are needed.

HOST SPECIFICITY IN PISSODES STROBI (COLEOPTERA: CURCULIONIDAE): ROLES OF GEOGRAPHY, GENETICS, AND BEHAVIOR

2000 ◽  
Vol 132 (6) ◽  
pp. 811-823 ◽  
Author(s):  
Thomas W. Phillips ◽  
Gerald N. Lanier
Keyword(s):  
New York ◽  
British Columbia ◽  
Host Specificity ◽  
Sitka Spruce ◽  
Picea Sitchensis ◽  
Host Specialization ◽  
Pinus Monticola ◽  
White Pine ◽  
Eastern White Pine ◽  
Pissodes Strobi

AbstractHost specificity of Pissodes strobi (Peck) from different geographic regions and genetic divergence of local host-associated weevil populations were studied in a series of experiments. Pacific coast P. strobi reared from Sitka spruce, Picea sitchensis (Bong.) Carr (Pinaceae), were unable to successfully colonize either eastern white pine, Pinus strobus L. (Pinaceae), or western white pine, Pinus monticola Dougl. ex D. Don., in a forced-infestation study on interplanted trees in New York. Reproductively mature field-collected P. strobi from British Columbia did not oviposit on eastern white pine in New York, but field-collected New York weevils successfully reproduced in Sitka spruce leaders in British Columbia. Unacceptability of eastern white pine for western P. strobi was shown to be under genetic control, rather than influenced by prior host experience on Sitka spruce. Pissodes strobi originating from Sitka spruce but reared one generation in the laboratory on the exotic Norway spruce, Picea abies (L.) Karst., were also unable to utilize eastern white pine as a host in a forced-infestation experiment in the field. Population genetic studies using allozyme electrophoresis found that P. strobi populations occurring on different host species within 2 km of each other had significant differences in allele frequencies in three out of four cases. These results suggest that P. strobi can exist as small breeding populations that can facilitate host specialization. Applied research on host resistance against P. strobi could target mechanisms that prevent western P. strobi from utilizing nonhosts such as eastern and western white pines.

Fish Eggs as a Cause of Human Botulism Two Outbreaks in British Columbia Due to Types E and B Botulinus Toxins

1960 ◽  
Vol 106 (1) ◽  
pp. 5-19 ◽  
Author(s):  
C. E. Dolman ◽  
M. Tomsich ◽  
C. C. R. Campbell ◽  
W. B. Laing
Keyword(s):  
British Columbia ◽  
Fish Eggs

Predation on Fish Larvae and Eggs by the Hydromedusa Aequorea victoria at a Herring Spawning Ground in British Columbia

1989 ◽  
Vol 46 (8) ◽  
pp. 1415-1427 ◽  
Author(s):  
Jennifer E. Purcell
Keyword(s):  
British Columbia ◽  
Fish Larvae ◽  
Clupea Harengus ◽  
Gut Content Analysis ◽  
Gut Content ◽  
Fish Eggs ◽  
Aequorea Victoria ◽  
Clupea Harengus Pallasi ◽  
Pelagic Eggs ◽  
Eggs And Larvae

The importance of soft-bodied zooplankton as predators of fish eggs and larvae was examined during March–June, 1983 in Kulleet Bay, Vancouver Island, British Columbia. The diet of the jellyfish Aequorea victoria was evaluated by gut content analysis of individually collected specimens. Crustacean zooplankters were eaten in lesser proportion, and larvaceans, fish larvae, hydromedusae, and siphonophores were eaten in greater proportion than their presence in the environment. Numerous herring larvae (Clupea harengus pallasi) were consumed, as well as the larvae of fishes in several other families (primarily Pleuronectidae, Cottidae, Scorpaenidae, Stichaeidae, Pholidae, and Gadidae), and the pelagic eggs of flatfish (Family Pleuronectidae). When herring larvae hatched in mid-March, A. victoria medusae in the bay contained an average of 22 herring larvae each, comprising 48% of all ingested prey. The predation rates on herring and other fish larvae were calculated from the numbers of larvae in A. victoria, the digestion times, and the field densities of medusae and larvae. Accordingly, 4 newly-hatched herring larvae∙m−3∙d−1 (0.7%∙d−1) were consumed by A. victoria but few were eaten after April 5–6. Predation on other fish larvae was [Formula: see text] larvae∙m−3∙d−1 during April 5 to May 3, but was not detectable in samples collected during May 9 to June 7. Other soft-bodied predators (ctenophores, chaetognaths, siphonophores, and other hydromedusae) contained few fish larvae.

The Occurrence of the King Crab, Paralithodes camtschatica (Tilesius), and of Lithodes aequispina Benedict in British Columbia

1962 ◽  
Vol 19 (3) ◽  
pp. 401-408 ◽  
Author(s):  
T. H. Butler ◽  
Josephine F. L. Hart
Keyword(s):  
British Columbia ◽  
King Crab ◽  
Paralithodes Camtschatica

Locality records are given of the capture of a number of king crabs in British Columbia waters. The extension of the known range of Lithodes aequispina to southern British Columbia is also reported. As these two species can be easily confused, figures and anatomical comparisons are provided.

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