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Rodriguez-Santiago M.A.,Autonomous University of Baja California | Rosales-Casian J.A.,Research Center Cientifica Educacion Superior Of Ensenada Bc
Helgoland Marine Research | Year: 2011

The metazoan parasite fauna of Caulolatilus princeps from northern Baja California, Mexico is quantitatively described for the first time. Further, the ecological aspects of prevalence, abundance, and intensity of infection are examined through an annual cycle. Six parasite species were recorded; 2 ectoparasites (1 monogenean and 1 copepod) and 4 endoparasites (2 digeneans and 2 nematodes). The digeneans Choanodera caulolatili and Bianium plicitum, the nematodes Anisakis sp. and Hysterothylacium sp., and the copepod Hatschekia sp. set new geographical and host records. The highest values of prevalence and abundance were in Anisakis sp. (prevalence = 93.3%, abundance = 12.4 ± 4.7 ind/host) and in Hysterothylacium sp. (prevalence = 86.6%, abundance = 16.5 ± 3.4 ind/host). The mean intensity of infection showed maximum values in summer (August = 14.2) and minimums in winter (February = 4.2). The mean intensity was higher in Hatschekia sp. (20.3 ± 7.8) followed by Hysterothylacium sp. (18.6 ± 1.4) and Anisakis sp. (12.9 ± 2.2). Larval stages of Anisakis and Hysterothylacium were particularly important due to their high abundance and prevalence, because they represent a human health risk (anisakiasis). In addition, the relationships between the metazoan parasites of C. princeps and host size and weight, fish condition and water temperature (bottom) are discussed. © 2010 Springer-Verlag and AWI. Source


Rodriguez-Santiago M.A.,National Autonomous University of Mexico | Rodriguez-Santiago M.A.,Autonomous University of Baja California | Rosales-Casian J.A.,Research Center Cientifica Educacion Superior Of Ensenada Bc | Grano-Maldonado M.I.,Autonomous University of Sinaloa
Helgoland Marine Research | Year: 2014

A parasite assemblage of Sebastes miniatus from northwestern Baja California, México, was composed of a total of 12 species: five ectoparasites (two monogeneans and three parasitic copepods) and seven endoparasites (two digeneans, one cestode, three nematodes, and one acanthocephala). Five of these parasites constituted new genera records to the genus Sebastes, and nine were new geographic records. The most abundant species were the endoparasites Parabothriocephalus sagitticeps, Hysterothylacium sp., and Anisakis sp., and the specific richness ranged from 1 to 8 parasite species per host. The most important parasite species in terms of prevalence were Microcotyle sebastis (93 %) and Anisakis sp. (92 %). The mean abundance of parasites found in S. miniatus showed significant variations over the year, with maximum values (31.7 individuals/host) in August, and minimum (0.39 individuals/host) in February. P. sagitticeps showed the highest mean intensity of infection (190.4 parasites/host), followed by Anisakis sp. (127.2 parasites/host) and Hysterothylacium sp. (46.6 parasites/host). The presence of larval stages of the nematodes Anisakis, Pseudoterranova, and Hysterothylacium is particularly important due to their high abundance and prevalence and because they may represent a human health risk (anisakiasis). Rockfishes (family Scorpaenidae) of the genus Sebastes constitute one of the most important groundfish resources in the American and Mexican northern Pacific Ocean, both for recreational and for the commercial fisheries of California and Baja California. These rockfish species makes up a substantial part of the Mexican cuisine. © 2014 Springer-Verlag Berlin Heidelberg and AWI. Source


Garcia-Nava H.,Autonomous University of Baja California | Ocampo-Torres F.J.,Research Center Cientifica Educacion Superior Of Ensenada Bc | Hwang P.A.,U.S. Navy
Boundary-Layer Meteorology | Year: 2015

In a previous study it was found that airborne and buoy-based measurements of wind stress made in the Gulf of Tehuantepc, México failed to agree. Here we revisit the issue and analyze data from both platforms in the context of flux-sampling strategies and find that there is now good agreement between wind-stress estimates from both experiments. The sampling strategies used for airborne and buoy-based sampling capture most of the contributing scales to the momentum flux and, correspondingly, the systematic errors for both stress estimates are low. On the other hand, the random error is much larger for the airborne measurements as compared with that for the buoy-based estimates. Increasing the averaging period for the aircraft-based estimates reduces the random error and brings the stress estimates into a better agreement with those from the buoy data. Since there is a good agreement between stress estimates, the apparent underestimation found earlier seems to be coincidental and caused by the interpolation method employed by the source paper. © 2015, Springer Science+Business Media Dordrecht. Source


Rosales-Casian J.A.,Research Center Cientifica Educacion Superior Of Ensenada Bc
California Cooperative Oceanic Fisheries Investigations Reports | Year: 2013

I report here on several unusual catches that may reflect on El Niño conditions off northern Baja California. Eleven finescale triggerfish, Balistes polylepis, were captured in waters off San Martin Island on July 30-31, 2011. This island is located (lat 30 °29'29.50"N, long 116 °6'52.02"W) close to San Quintín Bay in the northern Pacific off Baja California, Mexico, a temperate area influenced by strong upwelling. I also report on the catch of a roosterfish, Nematistius pectoralis, at Todos Santos Bay, Ensenada (close to El Sauzal port) (lat 31 °53'38.22"N, long 116 °41'58.36"W), on September 8, 2012. Both the triggerfish and roosterfish are tropical species, and their presence may be associated with the El Niño of 2009-10 and a weak El Niño in 2012, respectively. These occurrences constitute the first record both for finescale triggerfish in the San Quintín area and for roosterfish at Todos Santos Bay. Source


Caamal-Monsreal C.,National Autonomous University of Mexico | Uriarte I.,Austral University of Chile | Farias A.,Austral University of Chile | Diaz F.,Research Center Cientifica Educacion Superior Of Ensenada Bc | And 3 more authors.
Aquaculture | Year: 2016

Octopus maya is one of the most promising candidates for octopus aquaculture due to its holobenthic development. The objectives of this study were to investigate: i) whether the time required for embryonic development of this species can be reduced; ii) whether high or low temperatures affect the size and physiological characteristics of embryos; iii) whether temperature affects the time taken to reach stage XX, using thermal time; and iv) the effects of incubation temperature on hatchling performance, measured as survival after 10 d fasting. Eggs were acclimated at 18, 22, 26 and 30°C. Embryos incubated at 30°C reached stage XX 50 d before embryos incubated at 18°C. A mean value of 596 degrees day-1 was obtained for embryos incubated at 22 and 26°C where embryo development was optimum. Principal component analysis showed that arm length was the morphological characteristic that separated embryos incubated at 22°C from the rest of the treatments. Embryos in stage XIX and incubated at 26°C had a higher metabolic rate than embryos maintained at other experimental temperatures. The best hatchling performance was obtained with embryos incubated at 22°C. Results indicated that the optimal temperature for O. maya incubation is in the range of 22-26°C. Statement of relevance: Octopus maya is one of the most promising species for octopus aquaculture due its holobenthic development. This study will be useful when design production facilities because it gives key information to obtain the hatchlings with the best performance. © 2015 Elsevier B.V. Source

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