Ages of yellowfin grouper (n = 306) from the southeastern United States coast from 1979-2014 were determined using sectioned sagittal otoliths. Opaque zones were annular, forming January-June (peaking in February-March). Yellowfin grouper ranged in age from 3 to 31 years; the largest fish measured 1,000 mm fork length (FL). Body size relationships for yellowfin grouper were: W = 1.22 × 10(-5) F...

In the south Sumatra region of Indonesia, tiger grouper, Epinephelus fuscoguttatus, and humpbuck grouper, Cromileptes altivelis, are commercially important fish species. Recently, however, mass mortalities of the two species have occurred in the region and the cause of these mortalities has not been clarified. We surveyed the distribution of fish viruses including viral nervous necrosis virus (...

Reef fish spawning aggregations have gained distinction in terms of their importance in species conservation and their socio-economic contribution to many Caribbean, tropical western Atlantic, and Gulf of Mexico fishing communities. With the near extinction of many spawning aggregations of large grouper and snapper throughout the Caribbean, Gulf, and tropical western Atlantic, it is essential t...

The grouper species peacock hind (Cephalopholis argus) (Serranidae: Epinephelinae), a reef fish predator that is native over most of the IndoPacific region, was introduced to the Main Hawaiian Islands (MHI) in 1956 as part of an introduction program of snapper and grouper species intended to enhance nearshore fisheries (Randall, 1987). Today, this non-native predator occupies a dominant positio...

In order to develop excellent germplasm resources for giant grouper (Epinephelus lanceolatus), cryopreservation of giant grouper sperm was examined in the present study. Firstly, 13 kinds of sperm dilution (ELS1-3, EM1-2, TS-2, MPRS, ELRS0-6) were prepared with physiological salt, sucrose, glucose and fetal bovine serum. The physiological parameters of ELRS3 (ratio of fast motion, ratio of slow...

The whitespotted grouper Epinephelus coeruleopunctatus is one of the commercial marine fish species occurred in the coastal waters of Padang city, Indonesia. The population of the whitespotted grouper has been declining over last decade. Unfortunately, there was a lack of information on the biology of this species was available. Hence, the objectives of the present research were to examine the ...

Grouper (Epinephelus spp.) is a group of fish species with great economic importance in Asian countries. A novel hybrid grouper, generated by us and called the Hulong grouper (Hyb), has better growth performance than its parents, E. fuscoguttatus (Efu, ♀) and E. lanceolatus (Ela, ♂). We previously reported that the GH/IGF (growth hormone/insulin-like growth factor) system in the brain and liver...

We investigated the androgenic effects of 17α- methyltestosterone (MT) on gonadal sex reversal in juvenile red spotted grouper Epinephelus akaara. The fish were immersed in 17α-MT at 1 and 5 mg/L. Treatment method of 17α-MT was once weekly for 4 and 8 weeks. Fish were sampled at 12 months after end of the treatment period in order to histological analysis. At the initiation of an experiment (70...

The insulin-like growth factor type 1 receptor (IGF-IR) belongs to the tyrosine kinase (TK) receptor family. Besides being mitogenic, IGF-IR plays a crucial role in cell survival, transformation and maintenance of the malignant phenotype. In this study, we cloned the cDNA from the hypothalamus of the orange-spotted grouper (Epinephelus coioides) using reverse transcription PCR (RT-PCR) and the ...

Ann-Chang Cheng, Chia-Yung Chen, Chyng-Hwa Liou, and Ching-Fong Chang (2006) Effects of dietary protein and lipids on blood parameters and superoxide anion production in the grouper, Epinephelus coioides (Serranidae: Epinephelinae). Zoological Studies 45(4): xxx-xxx. The objectives of this study were to investigate the effects of dietary lipid and protein levels on blood parameters, body compos...