Growth and reproduction of the dolphinfish (<i>Coryphaena equiselis</i> and <i>Coryphaena hippurus</i>) in the Canary Islands, Central-East Atlantic (preliminary results)

Evaluación de la pesca del pez delfín Coryphaena hippurus (Perciformes: Coryphaenidae) en el Pacífico de Panamá

“…Martinez-Ortiz and Zuniga-Flores (2012) recently reported K values of 0.37 and 0.38 for males and females, respectively. Our study shows K values between 0.25-1.18, which is consistent for species with a high growth rate (Uchiyama et al, 1986;Patterson & Martinez, 1991;Castro et al, 1999;Lasso & Zapata, 1999). The growth efficiency calculated in this study was 4.61, which is within the range reported for Coryphaena hippurus (3.95-4.70), and similar (2011).…”

“…The growth efficiency calculated in this study was 4.61, which is within the range reported for Coryphaena hippurus (3.95-4.70), and similar (2011). This high growth rate also reflects the fast maturity of the species (Pew, 1957;Hinton, 1962;Castro et al, 1999), which allows them to reach commercial sizes and weights in a short period of time.…”

“…Coastal distribution and abundance seems to be strongly related to surface temperature and distance from temperature fronts (Farrel, Boustany, Halpin, & Hammond, 2014;Furukawa et al, 2014). The dolphinfish has a high growth rate and fast sexual maturity (Alemany & Massuti, 1998;Castro, Santiago, Hernandez-Garcia, & Pla, 1999), which may be associated with physiological adaptations for a pelagic predator (Benetti, Brill, & Kraul, 1995). The dolphinfish is a general predator that feeds on fish, crab, and squid; this species expends a lot of energy seeking and catching prey in the epipelagic zone, and it consumes ~5.6% of its body mass in food each day (Olson & Galván-Magaña, 2002;Aguilar-Palomino et al, 1998).…”

Reproductive biology of dolphinfish, <em>Coryphaena hippurus</em> (Actinopterygii: Coryphaenidae), in Saint Peter and Saint Paul Archipelago, Brazil

“…Castro et al (1999) obtained in the Canary Islands a sex ratio equal to 1.0 male:1.4 females for dolphinfish, with females predominating in size intervals lower than 85 cm FL, while in size intervals larger than 90 cm FL the males predominated. However, in a similar study conducted for Coryphaena equiselis the authors concluded that, although the sex ratio was also 1.0 male:1.4 females, for both the adults and the period in which the highest values of GSI were shown, the sex ratio found was 1 male:1 female.…”

“…Castro et al (1999) reported values of gonadosomatic index (GSI) with a peak in June for both sexes in the Canary Islands, coinciding with the summer in that region. Schwenke and Buckel (2008) reported that the highest values of GSI occurred in May for males and females in North Carolina.…”