Reproductive performance of the Pacific red snapper Lutjanus peru supplemented with microalgae (Grammatophora sp.)

Sagittal otoliths from four populations of the Pacific deep slope red snapper Etelis carbunculus Cuvier were compared using Fourier descriptors and other shape indices, linear proportions, and dry weight. Otoliths from Hawaii, Vanuatu, Fiji and French Polynesia and a small number from the Commonwealth of the Northern Marianas Islands (NMI) were examined. Regional shape and weight characteristics were distinguishable, despite the wide range of individual variation and limited available size range from some regions. Size-specific differences in otolith shape were found for the four regions for which a sufficient sample was available. Otoliths from Hawaii, French Polynesia, and NMI showed a significant shape affinity. Otoliths from Fiji and Vanuatu were similarly shaped and were distinct from those from the other three regions. Interregional otolith shape affinities for the stocks examined parallel similarities in maximum size and growth rate from the literature, suggesting that growth rate may influence otolith shape. Observed trends in otolith weight as a function of fish length support growth-related regional differences in otolith shape.

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The Occurrence of Sarcotaces in Canada

Journal of the Fisheries Research Board of Canada ◽

10.1139/f47-040 ◽

1949 ◽

Vol 7c (9) ◽

pp. 505-512 ◽

Cited By ~ 2

Author(s):

E. Kuitunen-Ekbaum Ph.D.

Keyword(s):

Pacific Coast ◽

Abdominal Cavity ◽

Parasitic Copepod ◽

Red Snapper ◽

The Pacific

A parasitic copepod, encysted in the abdominal cavity and in the muscles of the red snapper, Sebastodes ruberrimus, caught off the Pacific Coast of Canada, has been identified as Sarcotaces arcticus. Each cyst contained one female and one male copepod and had an opening through the skin of the fish by which, no doubt, the nauplius larvae are discharged.

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Determination of Toxins Involved in Ciguatera Fish Poisoning in the Pacific by LC/MS

Journal of AOAC International ◽

10.5740/jaoacint.sgeyogi ◽

2014 ◽

Vol 97 (2) ◽

pp. 398-402 ◽

Cited By ~ 35

Author(s):

Kentaro Yogi ◽

Satsuki Sakugawa ◽

Naomasa Oshiro ◽

Tsuyoshi Ikehara ◽

Kiminori Sugiyama ◽

...

Keyword(s):

Red Snapper ◽

Mouse Bioassay ◽

Promising Alternative ◽

Ciguatera Fish Poisoning ◽

Representative Species ◽

Fish Poisoning ◽

The Pacific ◽

Species Specific ◽

Lutjanus Bohar

Abstract Ciguatera fish poisoning is the most extensive and difficult to control of the seafood poisonings. Tofacilitate monitoring of fish toxicity, toxin profiles were investigated by an LC/MS/MS method using 14reference toxins on eight representative species of fish collected in four different areas of the Pacific. Snappers and groupers from Okinawa contained ciguatoxin-1B (CTX1B) and two deoxy congeners at variablebut species-specific ratios, while red snapper, Lutjanus bohar, from Minamitorishima, and amberjack, Seriola dumerili, from Hawaii, contained both CTX1B-type and CTX3C-type toxins. Spotted knifejaw, Oplegnathus punctatus, from Okinawan waters, contained mainly CTX4A and CTX4B, but the same species caught at Miyazaki was contaminated primarily with the CTX3C-type toxins. Otherwise, the toxin profiles were consistently species-specific in fish collected from various locations around Okinawa over 20 years. The LC/MS/MSand mouse bioassay results agreed well, indicating the LC/MS/MS method is a promising alternative to themouse bioassay. Pure CTX1B and CTX3C were prepared for use in future LC/MS/MS analysis.

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