Foraging behavior of Brazilian cormorant, Nannopterum brasilianus (Suliformes: Phalacrocoracidae)

Gheler‐Costa, Carla; Comin, Fábio Henrique; Gilli, Letícia C.; Verdade, Luciano Martins

doi:10.3897/zoologia.35.e14664

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Behavior descriptions of N. brasilianus are scarce. Previous studies have been described some aspects related to maintenance (Branco et al 2009), foraging (Gheler-Costa et al 2018), agonistic (Oliveira & Costa 2003), play (Sazima 2008), feeding associations with piscivorous Revista Brasileira de Ornitologia 26(3): 196-201. September 2018ARTICLE birds (D'Angelo & Sazima 2013) and dolphins (Santos et al 2010, Espinoza-Rodríguez et al 2015, and diving behaviors (Quintana et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Behavior and seasonal abundance of Neotropic Cormorant Nannopterum brasilianus (Gmelin, 1789) in southeastern, Brazil

Silva

Cabral

Ferreira

2018

Rev. Bras. Ornitol.

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Th e Neotropic Cormorant Nannopterum brasilianus (Gmelin, 1789) is one of the most common and abundant species in Brazil's aquatic environments, but little is known about its natural history. Th is study elaborates and quantitatively evaluates the ethogram and seasonal abundance of this species at Lake Açu, in Rio de Janeiro, Brazil. Between August 2013 and July 2014, behaviors were registered by the ad libitum sampling method and quantifi ed by the continuous recording during 30-min sessions. Th e mean number of sighted individuals per month was 30.41 ± 4.79. Abundance was higher during the dry season (41.5 ± 5.36) compared to the rainy season (19.33 ± 4.81) (t = 3.07, P = 0.01). A total of 42 behaviors were described and grouped into fi ve behavioral categories: maintenance (83.59%), ingestion/excretion (10.67%), locomotion (3.48%), play (1.65%), and agonistic behavior (0.61%). Th e time spent in these categories did not vary signifi cantly between the morning and afternoon periods. Th is study can be used as a starting point for further ethological studies on the species.

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Section: Introductionmentioning

confidence: 99%

Behavior and seasonal abundance of Neotropic Cormorant Nannopterum brasilianus (Gmelin, 1789) in southeastern, Brazil

Silva

Cabral

Ferreira

2018

Rev. Bras. Ornitol.

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“…Ever since the preliminary field observations of Dewar (1924), and the classical laboratory works of Scholander (1940), the physiological ecology of diving avian species has garnered the interest of numerous researchers (Lawrence 1950; Kooyman et al 1973; Winkler and Cooper 1986; Hustler 1992; Ellis and Jehl Jr. 2003; Wilson et al 2005; Gheler-Costa et al 2018). Some of these investigators simply monitored and recorded free ranging activities (Dewar 1924; Storer 1969).…”

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confidence: 99%

Netgun Capture Technique for the Western Grebe Aechmophorus occidentalis

Dorado

2023

Waterbirds

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The use of a netgun combined with other techniques facilitated the live capture of the Western Grebe Aechmophorus occidentalis occupying a shallow water harbor, with boat traffic, and abundant underwater structure. Transportability and adaptability rendered the netgun an effective tool, in this constrained environment. Haul-out structures such as nests were absent and grebes remained either swimming or floating, throughout their duration. Therefore, in-water access was imperative. Upon capture, grebes were then kept in captivity, to conduct in-laboratory investigations. An undertaking such as this has not been reported before. No grebes were injured during this procedure and capture rate was considered good.

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Cervical anatomy and its relation to foraging habits in aquatic birds (Aves: Neornithes: Neoaves)

Buchmann,

Rodrigues

2024

The Anatomical Record

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Birds have extremely flexible necks, which help in their search for food. However, studies on the variation in bird cervical anatomy and its relationship with foraging are rare, despite the different habits presented between species. Here, we analyze the anatomy of the neck of aquatic birds and relate it to their foraging strategies. We dissected specimens representing four species of Charadriiformes, 11 species of Phaethoquornithes, and two specimens belonging to the outgroup Telluraves. We chose to emphasize Charadriiformes and Phaethoquornithes because they present several strategies that require cervical mobility and stability. We note that vertebral anatomy and dimensions vary, which affects the shape and size of the soft tissues attached throughout the neck. The synovial cartilage present in the articulatio intercorporalis represents an additional length in the neck, however, this is not longer than that observed in animals with intervertebral discs. Our analysis indicates that birds have a prevalence of dorsoventral movements in the middle of the neck and lateral and rotational movements near the base of the neck, while the region near the head presents a wide range of movement in all directions. Cervical ligaments and muscles throughout the neck provide stability in all segments, although the robustness of the soft tissues indicates that the most caudal portion of the neck is the most stable. The vertebral and soft tissue anatomy is consistent with the extensive mobility in pitching, yaw, and roll movements performed mainly by the head and first segment of the neck during the different foraging of the analyzed birds. Furthermore, the muscles closer to the skull are robust and allow the execution of a variety of habits to capture food in different species. The subsequent cervical segments present differences that explain their reduction in mobility, but they are equally stable.

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Foraging behavior of Brazilian cormorant, Nannopterum brasilianus (Suliformes: Phalacrocoracidae)

Cited by 5 publications

References 12 publications

Behavior and seasonal abundance of Neotropic Cormorant Nannopterum brasilianus (Gmelin, 1789) in southeastern, Brazil

Behavior and seasonal abundance of Neotropic Cormorant Nannopterum brasilianus (Gmelin, 1789) in southeastern, Brazil

Netgun Capture Technique for the Western Grebe Aechmophorus occidentalis

Cervical anatomy and its relation to foraging habits in aquatic birds (Aves: Neornithes: Neoaves)

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