CO2-Driven Ocean Acidification Disrupts the Filter Feeding Behavior in Chilean Gastropod and Bivalve Species from Different Geographic Localities

2014 ◽  
Vol 38 (4) ◽  
pp. 1163-1177 ◽  
Author(s):  
Cristian A. Vargas ◽  
Victor M. Aguilera ◽  
Valeska San Martín ◽  
Patricio H. Manríquez ◽  
Jorge M. Navarro ◽  
...  



Toxins ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 577
Author(s):  
Aurore Sauvey ◽  
Françoise Denis ◽  
Hélène Hégaret ◽  
Bertrand Le Roy ◽  
Christophe Lelong ◽  
...  

Among Pseudo-nitzschia species, some produce the neurotoxin domoic acid (DA), a source of serious health problems for marine organisms. Filter-feeding organisms—e.g., bivalves feeding on toxigenic Pseudo-nitzschia spp.—are the main vector of DA in humans. However, little is known about the interactions between bivalves and Pseudo-nitzschia. In this study, we examined the interactions between two juvenile bivalve species—oyster (Crassostrea gigas) and scallop (Pecten maximus)—and two toxic Pseudo-nitzschia species—P. australis and P. fraudulenta. We characterized the influence of (1) diet composition and the Pseudo-nitzschia DA content on the feeding rates of oysters and scallops, and (2) the presence of bivalves on Pseudo-nitzschia toxin production. Both bivalve species fed on P. australis and P. fraudulenta. However, they preferentially filtered the non-toxic Isochrysis galbana compared to Pseudo-nitzschia. The presence of the most toxic P. australis species resulted in a decreased clearance rate in C. gigas. The two bivalve species accumulated DA in their tissues (up to 0.35 × 10−3 and 5.1 × 10−3 µg g−1 for C. gigas and P. maximus, respectively). Most importantly, the presence of bivalves induced an increase in the cellular DA contents of both Pseudo-nitzschia species (up to 58-fold in P. fraudulenta in the presence of C. gigas). This is the first evidence of DA production by Pseudo-nitzschia species stimulated in the presence of filter-feeding bivalves. The results of this study highlight complex interactions that can influence toxin production by Pseudo-nitzschia and accumulation in bivalves. These results will help to better understand the biotic factors that drive DA production by Pseudo-nitzschia and bivalve contamination during Pseudo-nitzschia blooms.



2013 ◽  
Vol 8 (4) ◽  
pp. 159-165 ◽  
Author(s):  
Yuji Toba ◽  
Masanori Sato




Oecologia ◽  
2015 ◽  
Vol 180 (2) ◽  
pp. 453-462 ◽  
Author(s):  
Cristian Duarte ◽  
Jorge López ◽  
Samanta Benítez ◽  
Patricio H. Manríquez ◽  
Jorge M. Navarro ◽  
...  




1973 ◽  
Vol 30 (3) ◽  
pp. 451-454 ◽  
Author(s):  
J. S. Scott

Gut contents of northern sand lance (Ammodytes dubius) were identified, measured by volume, and compared to volumetric analyses of plankton hauls. A. dubius is a plankton feeder, copepods (mainly Calanus finmarchicus) constituting about 65% of its food by volume. It combines filter feeding with selective feeding on larger food items such as euphausiids and fish larvae.



1995 ◽  
Vol 69 (6) ◽  
pp. 1079-1083 ◽  
Author(s):  
Danita S. Brandt ◽  
David L. Meyer ◽  
Peter B. Lask

Recurring associations of the trilobite ichnogenus Rusophycus with various “worm” burrows suggest an interaction between the two tracemakers, specifically, capture of the worm by the trilobite. An exceptional ichnofossil from the Upper Ordovician of southwestern Ohio shows characters consistent with previously described “trilobite hunting burrows” from Cambrian and Silurian strata. Preserved in convex hyporelief is R. carleyi, attributable to the trilobite Isotelus, on which is superimposed the case of a worm burrow of the ichnogenus Palaeophycus. The cast of the worm burrow appears to have been truncated by the digging activities of the trilobite, suggesting its predation of the worm. The exquisite preservation of ventral axial morphology of the trilobite distinguishes this Rusophycus from simpler bilobate forms attributable to filter-feeding behavior. Congruency in the preservation of worm and trilobite trace supports the conclusion that both were created at the same time, as the trilobite exited the intrastratal burrow. This is the first report of a trilobite hunting burrow from the Ordovician, and the first evidence for predatory behavior for the trilobite genus Isotelus.



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