Consulta: creatorFacets:"Veras,Leonardo B."
Registros recuperados: 2
Data/hora: 10/06/2024 13:37:48

Hunting tactics of the lemon shark, Negaprion brevirostris, in shallow waters of an oceanic insular area in the western equatorial Atlantic
Provedor de dados: Neotropical Ichthyology
Autores: 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

Evasive mating behaviour by female nurse sharks, Ginglymostoma cirratum (Bonnaterre, 1788), in an equatorial insular breeding ground
Provedor de dados: Neotropical Ichthyology
Autores: Afonso,André S.; Cantareli,Carlos V.; Levy,Rafael P.; Veras,Leonardo B.
ABSTRACT Mating events and aggregations of vulnerable nurse sharks Ginglymostoma cirratum were recorded in the insular protected area of Fernando de Noronha (FEN), Brazil, between April and August 2015. Female sharks were observed clustering in groups of up to 14 individuals in shallow water adjacent to the shore. Several evasive mating behaviours in the presence of males were noticed, including shoreward movement, positioning ventral side up at the sea surface with emerged pectoral and pelvic fins, body rolling and caudal fin thrashing. Fresh bite marks indicative of male courtship and coupling attempts were visible in female's pectoral and caudal fins. Altogether, the observed behaviours match previous reports of non-cooperative female nurse sharks...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bite marks; Copulation; Fernando de Noronha; Marine protected areas; Reproductive aggregations.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400207