Diet of Double-Crested Cormorants (Phalacrocorax Auritus) Wintering on the Central Texas Coast

Withers, Kim; Brooks, Tammy S.

doi:10.1894/0038-4909(2004)049<0048:dodcpa>2.0.co;2

Cited by 4 publications

(2 citation statements)

References 16 publications

(12 reference statements)

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“…Juveniles appear to sight-select microzooplankton and dinoflagellates as prey and also consume macrodetritus (Gavoni et al, 1983; Stoeker and Gavoni, 1984). In addition to supporting a large commercial fishery, menhaden form an important trophic step from plankton to higher-level predators: large fish, seabirds, and marine mammals (Scharf and Schlict, 2000;Withers and Brooks, 2004;Vaughan et al, 2011).…”

Section: Habitatsmentioning

confidence: 99%

An Overview of the Northern Gulf of Mexico Ecosystem

Spies¹,

Senner

Robbins

2016

goms

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The Gulf of Mexico is a large marine ecosystem (LME) bordered by the southern United States, Mexico, and Cuba. This general overview of its northern portion covers physiography, significant oceanographic features, the influence of major rivers and freshwater, biological productivity, and food web characteristics. It then describes the pelagic and benthic components of the major habitats: oceanic (continental slope and abyssal plain), continental shelf and bays, estuaries, and marshes, with descriptions of prominent processes and some dominant organisms. For each habitat several species from a variety of trophic levels are introduced and their general role in the ecosystem discussed. In 2010 the northern portion of the Gulf was the site of the largest U.S. marine oil spill in history and is now the focus of an unprecedented restoration effort. Successful restoration of the northern Gulf will depend on an integrated view of this LME and the forces that maintain and change it. This introduction to the northern Gulf marine ecosystem should be useful for policy makers, informing decisions on proposed restoration actions.

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Section: Habitatsmentioning

confidence: 99%

An Overview of the Northern Gulf of Mexico Ecosystem

Spies¹,

Senner

Robbins

2016

goms

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“…Chapter 3 45 Sex differences in mercury concentrations in piscivorous birds might relate to exposure differences. Male cormorants are heavier and structurally larger than females Chapter 2) and had larger fish in their stomach than did females Withers & Brooks 2004). Larger fish often have higher concentrations of mercury than smaller fish (Weiner et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Parasitism and contaminants : relationships and underlying mechanisms for a model endohelminth-bird association

Robinson¹

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Quantifying the Trophic Importance of Gulf Menhaden within the Northern Gulf of Mexico Ecosystem

Sagarese

Nuttall

Geers³

et al. 2016

Mar Coast Fish

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The Gulf Menhaden Brevoortia patronus is frequently cited as playing a predominant role in the trophic structure and function of the northern Gulf of Mexico (GOM) marine ecosystem, yet much work remains in quantifying its ecological importance. We performed a meta‐analysis of diet studies to quantify the trophic role of Gulf Menhaden within this ecosystem. Of the 568 references consulted, 136 identified predator–prey interactions involving Gulf Menhaden, menhaden Brevoortia spp., or unidentified clupeid prey items. Overall, 79 species were reported to consume menhaden, and no significant difference was detected between the Atlantic Ocean and the GOM in the mean occurrence of Brevoortia spp. in predator stomachs. We employed a probabilistic approach using maximum likelihood estimation to quantify trophic interactions within the northern GOM, with a focus on the trophic role of Gulf Menhaden. The estimated contribution of identifiable menhaden to the diets of all predators generally ranged between 2% and 3%; the largest dietary contribution was identified for Blacktip Sharks Carcharhinus limbatus (8%), and lower estimates (<2%) were obtained for oceanic species, including sharks, billfishes, and tunas. When diet compositions were adjusted for unidentified prey by using the proportion of fish species biomass in the ecosystem, five predator groups showed a relatively large dependence on menhaden prey: juvenile King Mackerel Scomberomorus cavalla, juvenile Spanish Mackerel Scomberomorus maculatus, adult Spanish Mackerel, Red Drum Sciaenops ocellatus, and Blacktip Sharks. The quantification of trophic linkages and key predators identified herein will be fundamental to future modeling efforts focused on the northern GOM ecosystem.Received March 24, 2015; accepted September 3, 2015

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Diet of Double-Crested Cormorants (Phalacrocorax Auritus) Wintering on the Central Texas Coast

Cited by 4 publications

References 16 publications

An Overview of the Northern Gulf of Mexico Ecosystem

An Overview of the Northern Gulf of Mexico Ecosystem

Parasitism and contaminants : relationships and underlying mechanisms for a model endohelminth-bird association

Quantifying the Trophic Importance of Gulf Menhaden within the Northern Gulf of Mexico Ecosystem

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