scholarly journals A Waterborne Behavioral Cue for the Actinotroch Larva of Phoronis pallida (Phoronida) Produced by Upogebia pugettensis (Decapoda: Thalassinidea)

2004 ◽  
Vol 207 (2) ◽  
pp. 103-115 ◽  
Author(s):  
Scott Santagata
Keyword(s):  
Upogebia Pugettensis ◽  
Behavioral Cue

Population Structure and Energetics of the Bopyrid Isopod Parasite Orthione Griffenis in Mud Shrimp Upogebia Pugettensis

2008 ◽  
Vol 28 (2) ◽  
pp. 228-233 ◽  
Author(s):  
Andrew E. Smith ◽  
Brett R. Dumbauld ◽  
John W. Chapman
Keyword(s):  
Population Structure ◽  
Upogebia Pugettensis ◽  
Mud Shrimp

Burrow distribution of thalassinidean shrimp on a Fraser Delta tidal flat, British Columbia

1987 ◽  
Vol 61 (2) ◽  
pp. 315-332 ◽  
Author(s):  
David D. Swinbanks ◽  
John L. Luternauer
Keyword(s):  
Substrate Surface ◽  
Textural Properties ◽  
High Water ◽  
Tidal Flats ◽  
Continuous Exposure ◽  
Burrow Density ◽  
In Situ Experiments ◽  
Upogebia Pugettensis ◽  
Sandy Sediments

Burrows of the thalassinidean shrimp Callianassa californiensis and Upogebia pugettensis, which resemble the trace fossils Thalassinoides and Ophiomorpha, respectively, occur on the southern tidal flats at the western front of the Fraser Delta. Burrow densities for both shrimp species are highest at lower intertidal levels immediately inshore of an extensive bed of Zostera marina eelgrass, but the high-density shrimp populations are segregated: the highest densities of C. californiensis burrows (350–450 burrow openings/m2) occur in a strip of clean sandy sediments, whereas U. pugettensis burrows are most abundant (30–80 burrow openings/m2) in a patch of muddy sands and sandy muds. On the tidal flats of the Fraser Delta as a whole, however, textural properties of the sediment show no consistent correlation with the burrow density of either shrimp.In the eelgrass bed, eelgrass root mats appear to markedly restrict the density of C. californiensis burrows. Towards the shore, the well-lined dwelling burrows of U. pugettensis occur no higher than mean sea level where maximum continuous exposure is ≤0.5 days. In contrast, C. californiensis, which has an unlined feeding burrow and a higher tolerance for anoxia, is present up to the margin of the local salt marsh which lies near the mean higher high water level where the flats can be exposed continuously up to 5 days.In situ experiments indicate that C. californiensis extrudes 18 ± 9 ml of wet sediment/shrimp/ day onto the substrate surface, while U. pugettensis seldom forms a mound around its burrow entrance. Burial of filter-feeding postlarval U. pugettensis under the mounds produced by C. californiensis may increase postlarval mortality and reduce adult populations of U. pugettensis in areas of high C. californiensis burrow density.The results of this study suggest that in distinguishing Ophiomorpha from Thalassinoides more emphasis should be placed on the presence of an extensive burrow lining in Ophiomorpha than on the presence of a knobby burrow exterior, because the former characteristic has a more profound bearing on burrow function, physiology of the occupant organism, and, consequently, burrow distribution.

Lactate formation in Callianassa californiensis and Upogebia pugettensis (Crustacea: Thalassinidea)

1979 ◽  
Vol 50 (3) ◽  
pp. 249-253 ◽  
Author(s):  
A. W. Pritchard ◽  
S. Eddy
Keyword(s):  
Upogebia Pugettensis ◽  
Lactate Formation

Physiological consequences of parasite infection in the burrowing mud shrimp, Upogebia pugettensis, a widespread ecosystem engineer

2012 ◽  
Vol 63 (1) ◽  
pp. 60 ◽  
Author(s):  
Michele Repetto ◽  
Blaine D. Griffen
Keyword(s):  
Ecosystem Engineer ◽  
Parasite Infection ◽  
Negative Effects ◽  
Previous Theory ◽  
North West ◽  
Mixed Support ◽  
The Pacific ◽  
Upogebia Pugettensis ◽  
Energetic State ◽  
Mud Shrimp

The burrowing mud shrimp, Upogebia pugettensis, is an important ecosystem engineer throughout bays and estuaries along the Pacific coast of North America. Populations of U. pugettensis have recently declined throughout its range. A likely reason for this decline is the arrival of an invasive bopyrid isopod parasite, Orthione griffenis, which has colonised the system and increased in prevalence. We tested the following three hypotheses regarding this host–parasite system: (1) parasite infection is correlated with the volume of water processed by the host; (2) infection negatively affects host’s energetic state; and (3) infection causes feminisation in male hosts. We used several physiological and morphological measures to quantify the effects of this parasite infection on U. pugettensis. The parasite appears to have different physiological effects on male and female hosts. Our study provides mixed support for the previous theory that predicted the mechanistic interactions between this host and its new parasite. Recent examples from other systems have demonstrated that invasive parasites can have far-reaching influences when they infect ecosystem engineers. Given the negative effects of O. griffenis on U. pugettensis, this invasive parasite may have similarly large impacts on Pacific North-west estuaries throughout its invaded range.

scholarly journals Social Responses to Expressive Suppression: The Role of Personality Judgments

2021 ◽  
Author(s):  
Allison Mary Tackman ◽  
Sanjay Srivastava
Keyword(s):  
Social Consequences ◽  
Expressive Suppression ◽  
Social Responses ◽  
Expressive Behavior ◽  
Emotional Context ◽  
The Social ◽  
Film Clips ◽  
Personality Judgments ◽  
Behavioral Cue

Why do people who suppress their emotion-expressive behavior have difficulty forming close, supportive relationships? Previous studies have found that suppression disrupts the dynamics of social interactions and existing relationships. We evaluated a complementary hypothesis: that suppression functions as a behavioral cue leading others to form negative personality impressions of suppressors, even at zero-acquaintance. In 2 studies, participants reported personality judgments and other impressions of targets who either suppressed or expressed their emotion-expressive behavior in response to amusing or sad film clips. In findings replicated across studies, targets who suppressed either amusement or sadness were judged as less extraverted, less agreeable, and more interpersonally avoidant and anxious than targets who expressed emotions, and participants were less interested in affiliating with suppressors compared with expressers. Effects were amplified when targets suppressed amusement (compared with sadness) and when participants knew the emotional context (compared with when they did not) and, thus, could form expectations about what emotions targets should be showing. Extraversion and agreeableness judgments mediated the effect of suppression on participants’ disinterest in affiliating. In Study 2, which extended Study 1 in several ways, effects were pronounced for the enthusiasm aspect of extraversion and the compassion aspect of agreeableness. We also found evidence that judgments of suppressors do not simply fall between neutral and fully expressing targets; rather, judgments of suppressors are qualitatively different. We discuss implications for understanding the social consequences of emotion regulation—in particular, how beyond disrupting relationships, suppression may prevent some relationships from even forming in the first place.

scholarly journals Systematics of the genus Scleroplax Rathbun, 1893 (Crustacea: Brachyura: Pinnotheridae)

Zootaxa ◽  
2006 ◽  
Vol 1344 (1) ◽  
pp. 33 ◽  
Author(s):  
ERNESTO CAMPOS
Keyword(s):  
Taxonomic Status ◽  
Host Record ◽  
Baja California Sur ◽  
Monotypic Genus ◽  
New Host ◽  
The Third ◽  
Neotrypaea Californiensis ◽  
New Host Record ◽  
Urechis Caupo ◽  
Upogebia Pugettensis

The taxonomic status of the monotypic genus Scleroplax Rathbun, 1893, is evaluated and separated from other genera of the Pinnixa White, 1846, complex. Distinguishing characters of Scleroplax are a hard, subheptagonal and dorsally, highly convex carapace, and a third maxilliped with a propodus that extends to the end of the dactylus. The genera Scleroplax, Pinnixa, Austinixa Heard & Manning, 1997, Glassella Campos & Wicksten, 1997, Indopinnixa Manning & Morton, 1987, and Tetrias Rathbun, 1898, share a carapace than is wider than long and a distinct lateral exopod lobe on the third maxilliped, all of which may represent monophyletic characters. Updated information on the distribution and hosts of S. granulata Rathbun, 1893, indicate that the species now ranges from Vancouver Island, British Columbia, Canada to El Coyote estuary, Punta Abreojos, Baja California Sur, México. It inhabits burrows of the echiuroid Urechis caupo Fisher & MacGinitie, 1928, and the mud shrimps Neotrypaea californiensis (Dana, 1854), N. gigas (Dana, 1852) (new host record), Upogebia pugettensis (Dana, 1852), and occasionally U. macginiteorum Williams, 1986 (new host record).

Population Structure and Energetics of the Bopyrid Isopod Parasite Orthione griffenis in Mud Shrimp Upogebia pugettensis

2008 ◽  
Vol 28 (2) ◽  
pp. 228-233 ◽  
Author(s):  
Andrew E. Smith ◽  
John W. Chapman ◽  
Brett R. Dumbauld
Keyword(s):  
Population Structure ◽  
Upogebia Pugettensis ◽  
Mud Shrimp
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