Published March 23, 2017
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Tab. 2 in Hunting tactics of the lemon shark, Negaprion brevirostris, in shallow waters of an oceanic insular area in the western equatorial Atlantic
Authors/Creators
- 1. Departamento de Botânica, Ecologia e Zoologia, Universidade Federal do Rio Grande do Norte, 59078 - 970 Natal, RN, Brazil & Laboratório de Pesquisa de Elasmobrânquios e Nécton Marinho, UNESP - Universidade Estadual Paulista, 11330 - 900 São Vicente, SP, Brazil
- 2. Laboratório de Pesquisa de Elasmobrânquios e Nécton Marinho, UNESP - Universidade Estadual Paulista, 11330 - 900 São Vicente, SP, Brazil
- 3. Recursos Pesqueiros, Instituto Federal do Rio Grande do Norte, 59500 - 000 Macau, RN, Brazil
- 4. Museu dos Tubarões, 53990 - 000 Fernando de Noronha, PE, Brazil
- 5. Laboratório de Pesquisa de Elasmobrânquios e Nécton Marinho, UNESP - Universidade Estadual Paulista, 11330 - 900 São Vicente, SP, Brazil & Curso de Engenharia de Pesca, UNESP - Universidade Estadual Paulista, 11900 - 000 Registro, SP, Brazil
Description
Tab. 2. Ethogram of snorkeling (S) and cliff-top (C) observed behaviours of Negaprion brevirostris in Fernando de Noronha Archipelago, Brazil (see Fig. 1 for location of sites).
| Behaviour category | Size class, sites observed | No., type and duration of observations | Behaviour description | Habitat type/ Depth |
|---|---|---|---|---|
| Substrate inspection | Juveniles and subadults less than 2 m TL, sites 1 and 2 | 89 (S), mean duration 8.5 seg (4-15 seg) | A shark approached a hole or crevice poking the substrate with its rostrum. The shark inclined the body forward and introduced its head and/or anterior part of the body in the hole performing abrupt lateral undulations to adjust the anterior part of the body to the hole and keep the body in position. | Reef flat and front reef, 0.5 to 1.5 m |
| Sardine blitz | Juveniles and subadults less than 2 m TL, sites 1 and 2 | 47 (S, C), mean duration 15.1 seg (4-30 seg) | One or more sharks approached the sardine schools exhibiting usual “patrolling behaviour” and when at a distance of less than 2 m, suddenly stroked the fishes with short bursts of speed towards a small part of the school. | Reef and rocky flats, sandy bottom with sparse reefs and rocks, 0.5 to 1.5 m |
| Sand hunting | Subadults larger than 2 TL and adults, sites 3 and 4 | 12 (C), mean duration 37.7min (17-38min) | Sharks larger than 2 m TL were initially observed performing “patrolling behaviour” at the deeper near-shore section of the beach (~ 1.5 m depth), immediately beyond the surf zone. Similar to the “sardine blitz” described above, but sharks only attacked the schools of sardines in the swash zone (0.3-1 m depth) immediately after the waves have broken. | Sandy beach, 0.3 to 1.5 m |
Notes
Published as part of Garla, Ricardo C., Gadig, Otto B. F., Junior, José Garcia, Veras, Leonardo B. & Garrone-Neto, Domingos, 2017, Neotropical Ichthyology 15 (1) on page e 160119, DOI: 10.1590/1982-0224-20160119, http://zenodo.org/record/20126939
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Related works
- Is part of
- Journal article: 10.1590/1982-0224-20160119 (DOI)
- Journal article: urn:lsid:plazi.org:pub:FFF17465FFB85C1EBB53AD47FFF4FFE7 (LSID)
- Journal article: http://zenodo.org/record/20126939 (URL)
- Journal article: http://publication.plazi.org/id/FFF17465FFB85C1EBB53AD47FFF4FFE7 (URL)