Resource utilization of puffer fish in a subtropical bay as revealed by stable isotope analysis and food web modeling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F19%3A00509649" target="_blank" >RIV/60077344:_____/19:00509649 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.int-res.com/abstracts/meps/v626/p161-175/" target="_blank" >https://www.int-res.com/abstracts/meps/v626/p161-175/</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3354/meps13045" target="_blank" >10.3354/meps13045</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Resource utilization of puffer fish in a subtropical bay as revealed by stable isotope analysis and food web modeling

Popis výsledku v původním jazyce

Estuaries often comprise a habitat mosaic, the connectivity of which depends in part on mobile organisms that move in between habitats for feeding and breeding. We assessed resource utilization by 2 co-existing puffer fish species, Sphoeroides testudineus and Sphoeroides greeleyi, in mangroves, saltmarshes and shallow subtidal channels of a subtropical bay. We hypothesized that puffer fish migrate into mangroves mainly to feed and that the coexistence of the 2 species may be explained by differences in resource utilization and/or by a differential preference for different foraging grounds. We combined a stable isotope approach with an Ecopath model that contrasted detritus-driven and herbivory-driven foodweb scenarios. The most parsimonious foodweb scenario involved the feeding of puffer fish on benthic invertebrates associated with Spartina marshes. This emphasizes the importance of saltmarshes as feeding grounds for both puffer fish species, independently of where they were sampled. Small differences in isotopic signatures between S. greeleyi and S. testudineus indicated major resource overlap, but also some degree of food partitioning probably through the selection of differently sized prey. The smaller S. greeleyi consistently had a slightly higher trophic level than the larger S. testudineus. S. testudineus had larger isotopic niche sizes as a consequence of greater inter-individual variation in resource use. Our results emphasize the importance of considering multiple habitats and foodweb scenarios when investigating resource use and species interactions in estuarine ecosystems.

Název v anglickém jazyce

Resource utilization of puffer fish in a subtropical bay as revealed by stable isotope analysis and food web modeling

Popis výsledku anglicky

Estuaries often comprise a habitat mosaic, the connectivity of which depends in part on mobile organisms that move in between habitats for feeding and breeding. We assessed resource utilization by 2 co-existing puffer fish species, Sphoeroides testudineus and Sphoeroides greeleyi, in mangroves, saltmarshes and shallow subtidal channels of a subtropical bay. We hypothesized that puffer fish migrate into mangroves mainly to feed and that the coexistence of the 2 species may be explained by differences in resource utilization and/or by a differential preference for different foraging grounds. We combined a stable isotope approach with an Ecopath model that contrasted detritus-driven and herbivory-driven foodweb scenarios. The most parsimonious foodweb scenario involved the feeding of puffer fish on benthic invertebrates associated with Spartina marshes. This emphasizes the importance of saltmarshes as feeding grounds for both puffer fish species, independently of where they were sampled. Small differences in isotopic signatures between S. greeleyi and S. testudineus indicated major resource overlap, but also some degree of food partitioning probably through the selection of differently sized prey. The smaller S. greeleyi consistently had a slightly higher trophic level than the larger S. testudineus. S. testudineus had larger isotopic niche sizes as a consequence of greater inter-individual variation in resource use. Our results emphasize the importance of considering multiple habitats and foodweb scenarios when investigating resource use and species interactions in estuarine ecosystems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Marine Ecology-Progress Series

ISSN

0171-8630

e-ISSN

1616-1599

Svazek periodika

626

Číslo periodika v rámci svazku

SEP

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

15

Strana od-do

161-175

Kód UT WoS článku

000485739800013

EID výsledku v databázi Scopus

2-s2.0-85072193027