COBIA (Rachycentron canadum)

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The spawning season, late June through mid-August, was defined through observation of gonadaltissue. A disproportionate sex ratio for areas within Chesapeake Bay was noted, 74:26 and 28:72males to females, for eastern and western shore areas respectively. A possible relation betweenspawning and a high ratio of males to females was noted for eastern shore areas.51. Rodrigues, R.V., Pedron, J.S., Romano, L.A., Tesser, M.B. & Sampaio, L.A. (2015). Acuteresponses of juvenile cobia Rachycentron canadum (Linnaeus 1966) to acid stress. AquacultureResearch, 46(5), 1241-1247.Fish are potentially submitted to water acidification when reared in recirculating aquaculturesystems. This study evaluated the responses of juvenile cobia Rachycentron canadum after acuteexposure to acid water. Juvenile cobia (12.6 ± 0.5 g; 14.2 ± 0.2 cm) were acutely exposed to fourpH levels (7.9 (control), 6.5, 6.0, and 5.5). After 24 h of exposure to different pH values, fish weresampled for physiological and histopathological evaluation. Acid water affected physiologicalparameters and induced morphological histopathologies on gill and skin of juvenile cobia, and theseeffects were more conspicuous with decreasing pH values. Acid stress induced blood acidosis injuvenile cobia, coupled to a decrease in bicarbonate (HCO 3 - ) and saturated O 2 (sO 2 ) in fish blood.On the other hand, haematocrit, haemoglobin and glucose concentration increased their values (P
these three end points were estimated using the Trimmed Spearman Karber Method. Cobia ceasedto eat at 0.62 (0.56-0.70) ppm NH 3 -N and 76.1 (73.2-79.0) ppm NO 2 -N. Swimming behavior wasaffected at higher concentrations: 0.80 (0.74-0.85) ppm NH 3 -N and 88.8 (82.6-95.5) ppm NO 2 -N.Even higher concentrations were necessary to kill juvenile cobia, LC50-96 h for ammonia wasestimated at 1.13 (1.06-1.19) ppm NH 3 -N, and within the range of concentrations tested for nitrite itwas not possible to estimate the LC50-96 h, as only 30% of the individuals died at the highestconcentration after 96 h (210 ppm NO 2 -N). The results of the present experiments demonstrate thatammonia could be problematic at relatively low levels for the intensive rearing of juvenile cobia;however, it is unlikely that the high levels of nitrite needed to harm juvenile cobia would be reachedin a well designed and properly operating RAS.54. Rohit, P., & Bhat, U.S. (2012). Fishery and diet composition of the cobia Rachycentron canadum(Linnaeus, 1766) exploited along Karnataka coast. Indian Journal of Fisheries, 59(4), 61-65.The fishery and food of cobia, Rachycentron canadum caught off Karnataka, south-west coast ofIndia was studied during 2007-2010. An estimated 302 t was landed annually along this coast whichformed 0.1% of the total fish catch of the region. Peak landings were recorded during Octoberfollowed by April. Gillnets landed large sized cobia and contributed to the bulk of the catch (53%).Maximum catch by this gear was during September-October. Next dominant gear was trawl whichlanded fishes of all size groups with maximum catch during April-May. Trawl landings contributed45% of the total cobia landings. The fishery was comprised of fishes of length range 26 - 125 cmTL with the mean at 58 cm. Juveniles dominated the catch. Contents of 177 non-empty stomachswere analysed for the index of relative importance (IRI) and prey specific abundance (PSA). R.canadum was found to be nonselective generalist carnivore feeder, foraging on micronektonicpelagic or benthic organisms (crustaceans, fish and molluscs) available in the epipelagic waters.Teleost fish (55%), crustaceans (35%) and molluscs (10%) contributed to the diet. Decapterusrusselli (18.0%) and Encrasicholina devisi (10.0%) were the dominant finfish groups; Acetes sp.(21.1%) followed by crabs (Charybdis spp. and Portunus spp.) with an IRI of 12.9% were dominantamong crustaceans and squids (Loligo spp.) (5.8%) and octopus (4.1%) comprised the dominantmolluscans prey items.55. Shaffer, R.V. & Nakamura, E.L. (1989). Synopsis of biological data on the cobia Rachycentroncanadum Pisces: Rachycentridae. National Marine Fisheries Service. NOAA Technical ReportNMFS 82, FAO Fisheries Synopsis 153, 21pp.Information on the biology and fisheries of cobia, Rachycentron canadum, is compiled andreviewed in the FAO species synopsis style. Topics include taxonomy, morphology, distribution,reproduction, pre-adult and adult stages, food, growth, migration, population characteristics, andvarious aspects of exploitation. Data and information were obtained from unpublished as well aspublished sources.56. Shiau, C.Y., Lin, R.T., Li, Y.L. & Chiou, T.K. (2001). Characterization of chemical compositionof cage cultured cobia (Rachycentron canadum). 6th Asian Fisheries Forum Book of Abstracts.338.Cobia is an important offshore cage culture fish in Taiwan. The factors influencing its chemicalcompositions were investigated in this study. An extraordinary feature present in cobia was that itsmeat accumulated a high amount of fat. The fat content in the ventral meat was 2 times higher thanthat of dorsal meat in the same fish. There was remarkable variation in fat among different size offish. The amount was significantly and positively correlated with fish size. The predominant freeamino acids (FAA) were taurine (Tau), glycine, alanine and glutamic acid. The FAA tended todecrease gradually as fish size increased. A dipeptide, anserine (Ans), was detected in the meat ofcobia. Among ATP-related compounds (ARC), inosine monophosphate (IMP) was the mostpredominant compound. The amount of IMP in dark meat and viscera were much lower than that inordinary meat. Both ARC and IMP had no significant correlation with fish size. The wild cobia hadhigher moisture content than that of cultured fish; however, the fat in dorsal or ventral meat of theformer was significantly lower than the latter. The content of Tau in wild cobia was higher thancultured fish. Ans level was not significantly different between wild and cultured cobia. However,another dipeptide, carnosine was detected only in wild fish. The seasonal variations of fat and tastecompounds such as FAA and ARC showed that the cobia was probably tastier at August toDecember. This fish was more easily spoiled than other fish. The pH value in white muscle wasusually lower than 6.0, which is similar to that of pelagic fish. The drastic degradation of ATP andAMP occurred at the initial 3 hour of storage at 4 °C, and IMP accumulated. The rapid degradation16
Page 1 and 2: COBIA (Rachycentron canadum)A SELEC
Page 3 and 4: SUBJECT INDEXPage1. General biology
Page 6 and 7: discontinuous germinal epithelium,
Page 8 and 9: 15. Darden, T.L., Walker, M.J., Bre
Page 10 and 11: The partial toxicity tests of coppe
Page 12 and 13: 30. Franks, J.S., Warren, J.R. & Bu
Page 14 and 15: 37. Hou, Y., Feng, J., Ning, Z., Ma
Page 16 and 17: Cobia, Rachycentron canadum, is an
Page 20 and 21: of IMP to inosine and hypoxanthine
Page 22 and 23: frequency distributions of males an
Page 24 and 25: showed that cobia fed the diet cont
Page 26 and 27: subsp. damselae and may be useful i
Page 28 and 29: 83. George, P.V. & Nadakal, A.M. (1
Page 30 and 31: market-size cobia cultured in Erkan
Page 32 and 33: within 72 hours. This phospholipase
Page 34 and 35: Eight species of Hemiuroidea are re
Page 36 and 37: performance standards for antimicro
Page 38 and 39: Taiwan and China. Feed cost is the
Page 40 and 41: enefit the rural poor, whereas offs
Page 42 and 43: government, and research institutes
Page 44 and 45: 137. Kaiser, J.B. & Holt, G.J. (200
Page 46 and 47: (DHA) and vitamin E levels compared
Page 48 and 49: and simplify water management. In t
Page 50 and 51: growth rates (SGR) did not exceed t
Page 52 and 53: this paper. ANOVA showed that food
Page 54 and 55: 170. Weirich, C.R., Stokes, A.D., S
Page 56 and 57: fingerlings for grow-out. This stud
Page 58 and 59: The techniques of homology cloning
Page 60 and 61: 190. Zhang, H., Mao, L., Feng, J.,
Page 62 and 63: This suggests that the enrichment o
Page 64 and 65: formerly characterized elovl5 elong
Page 66 and 67: 208. Weirich, C.R., Stokes, A.D., S
Page 68 and 69:
trypsin activities of intestine of
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decreased gradually as fish body we
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BIA methodology can be utilized as
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cobia were 21.72 mg kg -1 , 22.38 m
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effects upon final product quality,
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than the optimal requirement of cob
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A 9-week feeding trial was conducte
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soybean meal in Cobia, Rachycentron
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261. Sun, L., Chen, H., Huang, L.,
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fishes and invertebrates. Here we i
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274. Watson, A.M., Buentello, A. &
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estimated to be 44.7 mg kg -1 based
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20% of alternative protein meal, ne
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levels of methionine (0.61%, 0.83%,
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298. Mach, D.T.N. & Nortvedt, R. (2
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acids (FFA), peroxide value (PV), t
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068Breitenbach, B.078Brenkert, K.01
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271Duncan, M.226Dung, L.Q.023DuPaul
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139, 149Kilduff, P.180Kim, I.H.088K
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265Myrseth, B.140Nabavi, S.M.B.001,
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244Shi, C.071Shi, G.218, 262, 287Sh
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291Xie, J.269, 270Xu, H.037, 190Xu,
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COBIA (Rachycentron canadum)

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