Scientia Marina, Vol 64, No 3 (2000)

Egg and early larval development of laboratory reared goldblotch grouper, Epinephelus costae (Steindachner, 1878) (Pisces, Serranidae)


https://doi.org/10.3989/scimar.2000.64n3341

Branko Glamuzina
Institute of Oceanography and Fisheries, Laboratory of ecology and aquaculture, Croatia

Niksa Glavic
Institute of Oceanography and Fisheries, Laboratory of ecology and aquaculture, Croatia

Pero Tutman
Institute of Oceanography and Fisheries, Laboratory of ecology and aquaculture, Croatia

Valter Kozul
Institute of Oceanography and Fisheries, Laboratory of ecology and aquaculture, Croatia

Bosko Skaramuca
Institute of Oceanography and Fisheries, Laboratory of ecology and aquaculture, Croatia

Abstract


The embryonic and early larval development of the laboratory-reared goldblotch grouper, Epinephelus costae (Steindachner, 1878), are described and illustrated. The eggs, with a mean diameter of 926±19 µm and a range from 890-950 µm, were spherical and transparent with transparent chorion. Embryonic development lasted 24 hours at 25.5°C. Newly-hatched larvae were 1.762±0.047 mm in length. Absorption of the yolk sac was complete after the third day, when larvae reached 2.95±0.231 mm in total length. The mouth opened 60 hours after hatching, and was in function after 80 hours, with an opening diameter ranging from 280-320 µm. Larvae had two fields of intensive pigmentation, one above the intestine, and the other between the anus and the end of the notochord.

Keywords


goldblotch grouper; Epinephelus costae; egg and embryonic development; characteristics of larvae; pigmentation

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