Food sources and trophic relationships of three decapod crustaceans: insights from gut contents and stable isotope analyses

2015 ◽  
Vol 47 (9) ◽  
pp. 2888-2898 ◽  
Author(s):  
Zhigang Mao ◽  
Xiaohong Gu ◽  
Qingfei Zeng
Keyword(s):  
Stable Isotope ◽  
Trophic Relationships ◽  
Food Sources ◽  
Gut Contents ◽  
Decapod Crustaceans ◽  
Stable Isotope Analyses ◽  
Isotope Analyses

Gut contents and stable isotope analyses of the Antarctic fish, Notothenia coriiceps (Richardson), from two macroalgal communities

2010 ◽  
Vol 23 (2) ◽  
pp. 107-116 ◽  
Author(s):  
Jill P. Zamzow ◽  
Craig F. Aumack ◽  
Charles D. Amsler ◽  
James B. McClintock ◽  
Margaret O. Amsler ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Analysis ◽  
Antarctic Fish ◽  
Geographic Location ◽  
Trophic Relationships ◽  
Gut Contents ◽  
Amphipod Species ◽  
Stable Isotope Analyses ◽  
Notothenia Coriiceps ◽  
Isotope Analyses

AbstractGut contents studies have shown that Notothenia coriiceps, a prevalent shallow water fish species along the western Antarctic Peninsula, has a highly variable diet. This variability, coupled with small home ranges, suggest that microhabitat may play a role in determining the chief prey items of N. coriiceps. We trapped fish from three sites comprised of two different algal microhabitats around Palmer Station, Antarctica and investigated their diets via gut contents and stable isotope analyses. Gut contents analysis revealed that amphipods were the primary prey item at all three sites, but the distribution of amphipod species eaten varied between sites. Other important prey classes were snails, limpets, algae and fish. Overall, the gut content data suggested that algal microhabitat was less important than geographic location in determining diet. On the other hand, stable isotope analysis indicated that fish from the Palmaria decipiens site were more enriched in both carbon and nitrogen than fish from Desmarestia menziesii sites. Hence, it would appear that in the longer term, algal microhabitat may influence fish diets and trophic relationships.

Production sources and food web of a macrophyte-dominated region in Lake Taihu, based on gut contents and stable isotope analyses

2014 ◽  
Vol 40 (3) ◽  
pp. 656-665 ◽  
Author(s):  
ZhiGang Mao ◽  
XiaoHong Gu ◽  
QingFei Zeng ◽  
XianKun Gu ◽  
XuGuang Li ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Lake Taihu ◽  
Gut Contents ◽  
Stable Isotope Analyses ◽  
Isotope Analyses

scholarly journals Trophic Niche Dynamics and Diet Partitioning of King Crab Lithodes santolla in Chile’s Sub-Antarctic Water

Diversity ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 56
Author(s):  
Claudia Andrade ◽  
Cristóbal Rivera ◽  
Erik Daza ◽  
Eduardo Almonacid ◽  
Fernanda Ovando ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Trophic Position ◽  
Trophic Relationships ◽  
Diet Shift ◽  
Isotopic Niche ◽  
King Crab ◽  
Stable Isotope Analyses ◽  
Niche Variation ◽  
Isotope Analyses ◽  
Cape Horn

The southern king crab Lithodes santolla is one of the most economically important fishery species in the southern waters of the Atlantic and Pacific Oceans. A combination of stomach content and stable isotope analyses was used to reveal the potential dietary characteristics, isotopic niche, overlap among maturity stages and sexes, and trophic relationships of an L. santolla population in the Nassau Bay, Cape Horn region. Stable isotope analyses indicated that L. santolla assimilated energy from a basal carbon source, the giant kelp Macrocystis pyrifera, forming the trophic baseline of the benthic food web. Moreover, the trophic position of L. santolla varied among late juveniles and adults, suggesting that the southern king crab does undergo an ontogenetic diet shift. L. santolla exhibited intraspecific isotopic niche variation, reflecting niche differentiation which allows the species to partition resources. The trophic relationships of L. santolla with the associated fauna suggested some potential interactions for food resources/habitat use when they are limited. This study is the first attempt to characterize the trophic dynamics of the southern king crab in the Cape Horn area and, by generating more data, contributes to the conservation of the king crab population and the long-term management of local fisheries that rely on this resource.

Trophic analyses of opportunistic polychaetes (Ophryotrocha cyclops) at salmonid aquaculture sites

2015 ◽  
Vol 95 (4) ◽  
pp. 713-722 ◽  
Author(s):  
Flora Salvo ◽  
Dounia Hamoutene ◽  
Suzanne C. Dufour
Keyword(s):  
Stable Isotope ◽  
Trace Element ◽  
Trace Element Analysis ◽  
Food Sources ◽  
Spatial And Temporal Variation ◽  
Element Analysis ◽  
Associated Bacteria ◽  
Stable Isotope Analyses ◽  
Isotope Analyses

A new species of dorvilleid polychaete,Ophryotrocha cyclops, has been observed on the rocky seafloor underneath deep salmonid aquaculture sites on the south coast of Newfoundland, Canada. The distribution of these opportunistic worms is likely related to organic matter accumulation on the seafloor, and this species may have a role in remediation processes. To better understand the functional role ofO. cyclopsat aquaculture sites, it is important to know what they feed upon. Here, stable isotope analyses (δ13C, δ15N and δ34S) and trace element analyses were performed on dorvilleids and their potential food sources at three aquaculture sites. Stable isotope analyses revealed spatial and temporal variation in the isotopic carbon signature ofO. cyclops, highlighting possible differences in the food sources of individual dorvilleids within and between sites. The isotopic composition of dorvilleids was closest to that of fish pellets; the presence of abundant lipid droplets in gut epithelial cells ofO. cyclopssuggests the assimilation of fish pellet-derived lipids. Trace element analysis indicated thatO. cyclopsdoes not concentrate the aquaculture tracers Zn or Cu to a large extent. However, concentrations of sulphur were high inO. cyclopscompared with other sources. Taken together, results show thatO. cyclopsmost likely consume both fish pellets and flocculent matter-associated bacteria. As such, they are involved in sulphur cycling and fish pellet degradation at aquaculture sites.

Trophic Relationships between Two Gastropods and Seaweeds in Subtropical Rocky Reefs Based on Stable Isotope Analyses

2016 ◽  
Vol 35 (1) ◽  
pp. 191-197 ◽  
Author(s):  
Alejandra Piñón-Gimate ◽  
Mercedes M. Gómez-Valdez ◽  
Alejandra Mazariegos-Villarreal ◽  
Elisa Serviere-Zaragoza
Keyword(s):  
Stable Isotope ◽  
Trophic Relationships ◽  
Stable Isotope Analyses ◽  
Rocky Reefs ◽  
Isotope Analyses
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