|
|
|
|
|
| Garla,Ricardo C.; Gadig,Otto B. F.; Garcia Junior,José; Veras,Leonardo B.; Garrone-Neto,Domingos. |
| ABSTRACT The hunting tactics of lemon sharks, Negaprion brevirostris, are described from underwater and cliff-top observations in the Fernando de Noronha Archipelago, western equatorial Atlantic, Brazil. Two main tactics were observed in the shallow waters of sandy beaches and reefs environments: (i) “substrate inspection” of crevices and holes over rocky and reef bottoms, and (ii) “sardine blitz”, which refer to striking schools of fishes (mainly sardines) in the surf zone. The first tactic was restricted to juveniles up to 2 m of total length, whereas subadult and adult sharks with total length larger than 2 m displayed the second. As lemon sharks use waters less than 5 m depth to hunt, perform social behaviours and predator avoidance, results highlight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carcharhinidae; Elasmobranch; Foraging Behaviour; Predation; Predator-prey Interactions. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100206 |
| |
|
|
| Pimentel,Caio R.; Rocha,Luiz A.; Shepherd,Bart; Phelps,Tyler A. Y.; Joyeux,Jean-Christophe; Martins,Agnaldo S.; Stein,Carlos Eduardo; Teixeira,João B.; Gasparini,João Luiz; Reis-Filho,José Amorim; Garla,Ricardo C.; Francini-Filho,Ronaldo B.; Delfino,Stephanie D. T.; Mello,Thayná J.; Giarrizzo,Tommaso; Pinheiro,Hudson T.. |
| Abstract Although several studies on the ichthyofauna of the Fernando de Noronha Archipelago have been carried out, its mesophotic fish diversity has never been surveyed before. Here we used SCUBA and technical rebreather diving, baited remote underwater videos and remotely operated vehicle to record shallow (≤ 30 m depth) and mesophotic (31 to 150 m depth) fishes. Nineteen fish species belonging to 14 families are reported here as new records, representing an increase of 8.2% in marine fish richness for the region, which now has a total of 250 species and 77 families. These new records include four potential new species and highlight the importance of surveying mesophotic ecosystems, even in well studied sites. Our results also emphasize the need for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: BRUVS; Marine Protected Area; Oceanic Island; Rebreather; Remotely Operated Vehicle. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000400210 |
| |
|
|
|
