Reproductive behavior, embryonic and early larval development of the red head goby, Elacatinus puncticulatus.
The goals of this study are to provide a technical foundation for the production of the red head goby Elacatinus puncticulatus by evaluating its reproductive behavior and its embryonic and early larval development. Five pairs were kept under controlled conditions for thirty days. Courtship behavior, spawning period and the number of eggs produced were recorded. For the evaluation of embryo development, eggs were sampled at 12, 18, 24, 48, 72, 96, 120, 144 and 168h post-fertilization(HPF). To test the influence of the incubation period on larval total length and height, eggs with six days (6D) of incubation and with seven days of incubation (7D) were subjected to flashlight illumination for 30min to induce larval hatching. Another experiment evaluated the difference in larval survival with three different diets: Euplotes sp. (EU); rotifers Brachionus rotundiformis and Brachionus plicatilis and Paramecium sp. (BP); plankton collected from the wild (WP). The males displayed a gray head and pale yellow and black body coloration. Females exhibited strong red and black colors until three days before spawning, which occurred at intervals of 7 to 10 days. The hatching rate was 98-99%. The larvae total mean lengths and heights were 3.05 and 2.95mm (p>0.05) and 0.37 and 0.48mm (p<0.05) for treatments 6D and 7D, respectively. However, both groups exhibited high mortality at 5 days post-hatch (DPH). No larvae from the EU group survived after 5 DPH. At 8 DPH, 4% survivorship was found in treatment BP and 2% in treatment WP.
Vero Beach Marine Laboratory, Florida Institute of Technology, 805 East 46th Place, Vero Beach, FL 32963, USA; Integrated Group of Aquaculture and Environmental Studies (GIA), Federal University of Paraná, Rua dos Funcionarios, 1540, Cabral, Curitiba, PR 800350-050, Brazil.
Ana Silvia
AS
Pedrazzani
Vero Beach Marine Laboratory, Florida Institute of Technology, 805 East 46th Place, Vero Beach, FL 32963, USA.
Nancy Kim
NK
Pham
Vero Beach Marine Laboratory, Florida Institute of Technology, 805 East 46th Place, Vero Beach, FL 32963, USA.
Junda
J
Lin
Integrated Group of Aquaculture and Environmental Studies (GIA), Federal University of Paraná, Rua dos Funcionarios, 1540, Cabral, Curitiba, PR 800350-050, Brazil. Electronic address: ostrensky@gia.org.br.
Antonio Ostrensky
AO
Neto
D000821:Animal Feed; D000818:Animals; D017756:Aquaculture / Q000379:methods; D001947:Breeding; D004032:Diet; D004625:Embryo, Nonmammalian; D047108:Embryonic Development; D005260:Female; D007185:Incubators; D007814:Larva / Q000254:growth & development; D008297:Male; D010473:Perciformes / Q000196:embryology / Q000254:growth & development / Q000502:physiology*; D012726:Sexual Behavior, Animal
Breeding; Marine fish; Ornamental; Rearing