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  • Articles  (378)
  • Fisheries  (375)
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  • Tehran, Iran  (171)
  • 101
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    Survey on stocks of Caspian Sea mullets (Liza aurata; Liza saliens ) in Iranian coastal waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25737 | 18721 | 2018-10-13 06:22:04 | 25737 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to determine growth parameters, catch and fishing effort trends, stock assessment of Caspian Sea mullets in the Iranian coastal waters of Caspian Sea in the fishing season of 2013-2014. For gathering of data on biometry and catch statistics, 5 mobile working group in the regions of Anzali, Kiashahr, Noshahr, Babolsar and Torkmen were involved from the start to the end of fishing season.Gathered data Were entered to the computer. For data analysis, common methods were undertaken for estimation of growth parameters, mortality rates, biomass and Maximum Sustainable yield (MSY) as well. According to the result, the number of beach seines cooperatives was 124 and fishing efforts were 44688 beach seining haul. The catch per unit of effort CPUE) was calculated 53 kg/haul during this fishing season. The total catches of Caspian Sea mullets (including illegal fishing estimated as 2373 mt. Growth parameters of golden gray mullet (Liza aurata) were estimated as K=0.16/yr, L_∞=57.4 cm, t_0=-0.45/yr. Based on catch-at-age data, in the fishing season of 2013-2014, the total biomass, from the biomass-based cohort analysis were estimated 12473.3. mt. Based on these results, the fishing mortality rate in fishing season of 2013-2014 were 0.575/yr. In this survey, the Maximum sustainable yield were estimated as 2558.6 mt respectively. Generally from three Northern Province’s cooperatives 3406 samples collected. Results of biometry of golden gray mullet (Liza auratus) showed that the mean length and weight and age of this species were 32.3±6.1 cm and 383.5±74.823.4 g and 1.2±5.6 y respectively and leaping gray mullet (Liza saliens) showed that the mean length and weight and age of this species were 24.8±3.3 cm and 119±25.5 g and 2.5±0.6 y respectively. The biometric results showed that, 97.5% of the samples belonged to golden gray mullet and population of leaping gray mullet was sever declined. Also, the fishing of the mullet was increased over the last year by 10.3 % from 2151 tons to 2373 tons per year during 1391-92 and 1392-93, respectively .
    Keywords: Fisheries ; Iran ; Caspian Sea ; Anzali ; Kiashahr ; Noshahr ; Babolsar ; Torkmen ; Iranian waters of the Caspian Sea ; Mullets ; Caspian Sea mullets ; Liza aurata ; Growth ; Mortality ; Parameters ; Biomass ; Biometry
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  • 102
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    Supply and protected different population of Litopenaeus vannamei subadult zero foster (F0) from difference provinces Iran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25754 | 18721 | 2018-10-13 07:36:51 | 25754 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Nowadays, Litopenaeus vannamei are the most important species of farmed penaeidae shrimp in the world that is rapidly replacing native species in areas aquaculture. Due to demand increase for this species culture, shrimp displacement to different areas may be associated with some potential pathogens transferred to new areas farmed. Therefore, in this study were prepared bi-osecurity conditions for specific disease-free production of L. vannamei. Thereafter, three populations (Molokaei, High health and mix of Molokaei and High health) of the shrimp various reserves were detected base on origin and genetic indexes such as: observed heterozygosity, expected heterozygosity, allele frequency, coefficient inbreeding, genetic differentiation, genetic distance and genetic identity. On the other hand, epidemiological studies indicate non pathogens (viral, bacterial, fungal and parasitic) recognition of different populations selected in the quarantine salon. The bioassay results showed that the average weight and length of the populations of High health and Mix significantly greater than was a population of Molokaei. The shrimp populations were stocked in fiberglass tank (five ton) and were kept separated in the quarantine salon. During maintenance shrimp of populations in the quarantine salon were evaluated living and non-living pathogens with PCR, microbiology and biochemical methods. There is not any pathogens detection from shrimp populations stocking in the quarantine salon, so the shrimps were carried over to pond for broodstock culture of specific pathogenic free.
    Keywords: Fisheries ; Iran ; Litopenaeus vannamei ; Specific pathogenic free ; Bi-osecurity ; Population
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  • 103
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    Biomass estimation of demersal resources in the Persian Gulf and Oman Sea by swept area method (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25752 | 18721 | 2018-10-13 06:16:11 | 25752 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Regarding to monitor of demersal resources in the Persian Gulf and Oman Sea, and also biomass and CPUA estimation of them, ten research cruises were carried out by using R/V Ferdows-1 equipped with bottom trawl, covering the area from 49º 00´ E in the west (north-west Persian Gulf) to 61º 25´ E in the east (borderline with Pakistan) from 2012 to 2014 The study area was stratified into 17 strata (A to Q) of which 10 strata (A to J) were in the Persian Gulf and 7 strata (K to Q) were in the Oman Sea, covering the depths of 10-50 m in the Persian Gulf and 10-100 m in the Oman Sea. A total of 316 stations were randomly selected and the biomass and CPUA were estimated by swept area method during this three years period, the strat A and B weren’t covered. The comparison between two regions indicated that the percentage of density of demersal fishes in the Persian Gulf during years 2012, 2013 and 2014 were 1.0, 1.4 and 1.6 times more than the Oman Sea and totally 50-60% of total biomass was found for the Persian Gulf. Also a comparison among 17 strata the highest biomass was found for K region (Sirik to Jask) in the Oman Sea in 2012 & 2014; and C region (Genaveh to Bordkhoon) in 2013 in the Persian Gulf. The same comparison was done for CPUA of commercial, non-commercial and total in both water bodies and it was found that in years 2012 to 2014 the region K (Sirik to Jask) in the Oman Sea and Stratum Q (Bersi to Gwatr) had the highest value of CPUA. On the contrary, the stratum M (Biahi to Galak estuary) showed the lowest value of biomass for both commercial and non-commercial fishes. With review the mean CPUA in different depth layers for years 2012, 2013 and 2014, it was concluded that in the Oman Sea with increasing the depth, the mean CPUA is decreased and the lowest CPUA belongs to depths of 30-50 m The comparison between commercial and non-commercial groups in both ecosystems, it concluded that the density of commercial species were higher than non-commercial ones; and for years 2009, 2010 and 2011 the commercial species consist of 63.4, 65.0 and 59.7 % of total biomass. In all years the Persian Gulf indicated higher values than the Oman Sea. The most abundant fishes were Rays, Ribbon fishes, Carangids, Grunts, Japanese threadfin bream, Lizardfish and Barracuda for both Persian Gulf and Oman Sea.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Oman Sea ; Commercial fishes ; Non-commercial fishes ; Biomass ; CPUA ; Species ; Estimation ; Method ; Area ; Demersal resources
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  • 104
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    Supply and protected different population of Litopenaeus vannamei subadult zero foster (F_0) from difference provinces Iran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25762 | 18721 | 2018-10-13 07:57:25 | 25762 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Nowadays, Litopenaeus vannamei are the most important species of farmed penaeidae shrimp in the world that is rapidly replacing native species in areas aquaculture. Due to demand increase for this species culture, shrimp displacement to different areas may be associated with some potential pathogens transferred to new areas farmed. Therefore, in this study were prepared bi-osecurity conditions for specific disease-free production of L. vannamei. Thereafter, three populations (Molokaei, High health and mix of Molokaei and High health) of the shrimp various reserves were detected base on origin and genetic indexes such as: observed heterozygosity, expected heterozygosity, allele frequency, coefficient inbreeding, genetic differentiation, genetic distance and genetic identity. On the other hand, epidemiological studies indicate non pathogens (viral, bacterial, fungal and parasitic) recognition of different populations selected in the quarantine salon. The bioassay results showed that the average weight and length of the populations of High health and Mix significantly greater than was a population of Molokaei. The shrimp populations were stocked in fiberglass tank (five ton) and were kept separated in the quarantine salon. During maintenance shrimp of populations in the quarantine salon were evaluated living and non-living pathogens with PCR, microbiology and biochemical methods. There is not any pathogens detection from shrimp populations stocking in the quarantine salon, so the shrimps were carried over to pond for broodstock culture of specific pathogenic free.
    Keywords: Aquaculture ; Fisheries ; Iran ; Litopenaeus vannamei ; Specific pathogenic free ; Bi-osecurit ; Population
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  • 105
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    Monitoring (biology and catch) of kilka in Iranian commercial catch regions (2002-2005) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25084 | 18721 | 2018-08-22 07:18:57 | 25084 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Through most of the last century, three endemic kilka species supported major commercial species in the Caspian Sea. It is clear that catches and abundance of all species have changed. Recent changes in the Caspian Sea ecosystem have occurred as a consequence of ecological change caused by the invasive ctenophore (Mnemiopsis leidyi). In this investigation which had been done in commercial catch regions during 2002-2004, in addition of biological characteristics survey such as species composition, length, weight, age, sex ratios and maturity stages; catch and catch per unit effort also were analyzed. During the years 2002-2004 the annual catches of kilka varied between 15000-25000 mt and CPUE varied between 1.077-1.474 mt (vessel×night). The frequency of anchovy kilka declined from 69.5% in 2002 to 26.9% in 2004. During the years 2002, 2003 and 2004 the frequency of common kilka were 30.4%, 48.9% and 71.9%, respectively. During this period the frequency of bigeye kilka was negligible. The average fork length of anchovy kilka increased from 100.4 mm in 2002 to 105.0 mm in 2004 and the average weight were 6.4 g and 8.4 g, respectively. The average fork length of common kilka increased from 87.0 mm in 2002 to 93.8 mm in 2004 and the average weight were 5.2 g and 7.4 g, respectively. Anchovy kilka spawn in spring and autumn but mass spawning anchovy occurred in autumn. Spawning of common kilka occurred in spring and early summer. In the age compositions of anchovy kilka, age 3 was the largest age group during 2002 and 2003 (55.3% and 52.1%, respectively). In 2004, age 4 predominated (42.5%). For common kilka, ages 3 and 4 predominated (representing 67.2, 62.0 and 69.1% of catches, respectively). According to CPUE and biological characteristics, after the appearance of ctenophore in the Caspian Sea, the abundance and biomass of bigeye and anchovy kilka collapsed.
    Keywords: Biology ; Fisheries ; Iran ; Caspian Sea ; kilka ; Species ; Ecosystem ; Mnemiopsis leidyi ; Survey ; Length ; Age ; Sex ratios ; Weight ; Maturity ; CPUE ; Anchovy Kilka ; Spawning ; Bigeye kilka
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  • 106
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    Stock assessment of bonyfishes in the Iranian coastal water of the Caspian Sea (2004-2005) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25094 | 18721 | 2018-08-23 05:31:17 | 25094 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: For gathering of data on biometry and catch statistics, 5 mobile working group in the regions of Anzali, Kiashahr , Noshahr , Babolsar and Torkmen were involved from the start (2004.10.23) to the end of fishing season (2005.04.10). Gathered data were entered to the computer based on species. For data analysis different methods were undertaken such as Bertallanfy equation for growth parameter Beverton and Holt for total mortality rates, pauly's imperical model for natural mortality rate and cohort Analysis for biomass estimation. Total catch with taking into account of poaching, was estimated 15140 tons reported by scientific committee of catch and fishing harbor relief of Iranian Fishery Company. The total recorded catch of beach seine cooperatives was 10644 tons that comprise 70.2% of the total catch. Total catch of Caspian Kutum was estimated 6612 tons that had 1856 tons (22%) decrease with comparison of the last year. Biomass of Caspian kutum in Iranian coastal Water of the Caspian Sea in 2003-2004 estimated about 20400 tons. The total catch of golden gray mullet was estimated 4425.6 tons that constitute 29.2% of total catch of bony fishes. Biomass of this species was estimated 12200 tons and based on this amount of biomass, Maximum Sustainable Yield (MSY) was calculated as 3577 tons. Long nose mullet comprised only 1.4% of the mullet catch. The catch of common carp in 2004-2005 fishing season continued its increasing trend and caught in amount of 3087 tons by beach seine cooperatives that had 2.2 fold increase in comparison of previous fishing season. Most of the catch occurred in Golestan province and was immature and undersize and the length frequency modes showed moving towards bigger size and older age groups in comparison of previous fishing season. The catch of pick perch in 2003-2004 decreased with comparison of the last year and estimated about 22.5 tons. Most of the catch of pick perch was immature and undersize. Approximately all of the catch is due to releasing of fingerling of this species by Fishery Company especially in Guilan province. Total catch of bream was estimated 27.4 tons and most of which was immature and undersize. Population of asp is critically endangered and the catch of this species is very low (500 kg). Restocking of this species must be considered by Iranian fishing company.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Anzali ; Kiashahr ; Noshahr ; Babolsar ; Torkmen
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  • 107
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    Comprehensive study on probability of controlling Caspian Sea invasive Ctenophora Activity 4: The laboratory study on probability of controlling Mnemiopsis leidyi by use of Beroe ovata (reproduction study of B. ovata in the Caspian Sea water) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25096 | 18721 | 2018-08-23 05:35:57 | 25096 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In 1999 Mnemiopsis leidyi was introduced to the Caspian Sea from the Black Sea with ballast waters from the ships. The comprehensive study on probability of controlling Caspian Sea invasive Ctenophora planned after a remarkable of decreeing in Kilka fish catches stocks and fisheris community problems. This study focus on reproduction experiments of Beroe ovata as the best candidate for control of Mnemiopsis population size in the Caspian Sea that was performed in Turkey and Iran during 2002-2003. At 2002, 87 specimens of B. ovata, 10-50 mm transferred to Caspian sea ecology research center from Marmareh sea where acclimated with Caspian sea water gradually. At 2003, experiments were performed near to Black sea (at Sinop) with freshly collected Beroe ovata, 40-65 mm size in three salinity level treatment, the Black sea water 18 , Mixed water 15 and Caspian water 12 . 130 individuals of Beroe ovata were brought from Sinop (Turkey) to Iran during 2003. A number of Beroe specimens were sent to Guilan province for reproduction studies and another part were sent to Mazandaran province for both reproduction and mesocosem studies. For control we had 1 Beroe, length 30 mm in the Black Sea water that was alive during of study in Iran. The Jars were examined each day for ova and larvae and they were collected and put into glass container of Caspian water for hatching and developing survey, some of them were left without any handling for larvae developing. Also in another experiment the eggs collected from jars were placed in the same three treatments for studying of growth and survival. The results were unsuccessful on propagation experiments at 2002 since the spawning and hatching rates were very low (20 ova) and, none of the larvae developed into adults in Caspian Sea water. The spawning was more in Marmareh sea water with 138 ova where only 7 larvae was hatched. Results showed that Beroe specimens is able to survive and reproduce in Caspian water but was not as well as Black Sea also the Beroe larvae growth rate is low in the Caspian Sea water. Maximum fecundity of Beroe individual was 2212 and 235 ovae in Caspian Sea water in site Sinop and Iran respectively. Results showed 34-100% eggs in Caspian Sea water were destroyed and did not develop. In Iran we obtained only one larvae with 5 mm length, other larvae were at different stages of development but most of them were 1.2 2 mm. The results of mesocosm survey showed most of ova and larvae have been obtained from the tanks where individuals B. ovata were with Mnemiopsis. Fecundity of Beroe in the control with Black Sea water were between 17 to 1879 with average of 828 ± 112 ova. The poor results of B. ovata reproduction obtained in this survey in Caspian Sea may be due to transportation and acclimation stress and low salinity of Caspian Sea water.
    Keywords: Ecology ; Fisheries ; Iran ; Caspian Sea ; Mnemiopsis leidyi ; Beroe ovata ; Survival ; Growth ; Comprehensive ; Laboratory
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  • 108
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    Study of the fluctuations in the sturgeon populations in the coastal water of the Caspian Sea (Golestan Province) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25100 | 18721 | 2018-08-23 05:41:22 | 25100 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study the frequency of the sturgeon population in the lower depth (〈10m) of the south Caspian Sea in four area are investigated. Absolut frequency and CPUE are studied per seasons in four regions during 2003-2005. The number of total catch of the sturgeon during 2003-2005 was 568 that 262 and 306 respectively were caught in 2003-2004 and 2004-2005. Persian Sturgeon (Acipenser persicus) was the most dominant species in the catch and other species suches Stellate Sturgeon (A.stellatus) spine Sturgeon (A.undiventris). Persian Sturgeon (A.gouldenstadti) and Great Sturgeon (Huso huso) were more frequent respectively. Most of the Persian Sturgeon were caught at the TAZEABAD, MIAN GHALEA, KHAJANAFAC and TORKMAN fishery stations respectively. Most of catch in 2003-2004 has been in 2 meter depth of water where as it was in 10 meter depth in during 2004-2005. Persian Sturgeon has the highest CPUE value in 2003-2005. The CPUE value for Persian Sturgeon, 0.69, 0.58, 0.28, 0.21 Stellate Sturgeon, Spine Sturgeon, Russian Sturgeon and Great sturgeon, 0.03 were respectively. Fluctuation of length size of Persian Sturgeon in 2003-2005 were between 10 to 140 centimeter. Significant different for mean length Persian Sturgeon between (2003-2004) and (2004-2005) were found tukey test p〈0.05 but there were not found for mean length Stellate Sturgeon at this tim.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Golestan province ; Fluctuations ; Sturgeon ; Population ; CPUE ; Acipenser persicus ; A.stellatus ; A.undiventris ; A.gouldenstadti ; Fishery ; Persian sturgeon ; Stellate Sturgeon ; Spine Sturgeon ; Russian sturgeon ; Great sturgeon
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  • 109
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    Monitoring green tiger prawn stock in Bushehr Province waters (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25102 | 18721 | 2018-08-23 05:24:59 | 25102 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The results of 30 months of trawl sampling on P. semisulcatus, De Hann 1848, obtained through operational phase of MONITORING GREEN TIGER PRAWN RESOURCES project, along with results of another available 28 months of the data of the same structure prior to this, has formed an invaluable time series of data as a proper basis for the further analysis. The survey area is located at North-west of the Persian Gulf from Bahrekan to Dayer waters. The ultimate goal of this study is to come to a better understanding of behavioral pattern of Green Tiger Prawn in its exploited phase after recruitment to the fishery. In this study, the confirmation of the life cycle of P. semisulcatus, to the general life pattern of Penaeidae shrimps was observed. Of the peculiarities of this pattern are the yearly bi-modal spawning and two corresponding peaks of recruitment. There exist two spring and autumn generations, which the major spawning in autumn produces the main recruitment in summer and the autumn generations stem from spring spawning. The spatial and temporal distribution of shrimp is highly variable by month and year. Depending on the year, higher shrimp densities are often found in early summer between Lavar and Rostami and/or Rostami to Bushehr and extend north and south in August. This result can be used in better design of sampling scheme for nursery studies. The main recruitment, which the fishery is depended upon, is in July to August and a second one occurs December-February. The timing and strength of both recruitments vary inter-annually. The proportion of prerecruits in southern area is always higher and the modes more prolonged than in northern area. The period of major recruitment starts earlier and lasts longer in the south than the north. A consistent pattern is not seen for the secondary recruitment, which, usually occurs in December-January. It is hypothesized that 1- the secondary recruitment might occur in Kuwait and/or Saudi Arabia waters, 2- insufficient number of spawners in spring or 3- high mortality in summer could cause the weakness of secondary recruitment. The spatial distribution of the mature female shrimps in spawning months indicates that the northern part of study area is an aggregation ground. It is also found that this aggregation grounds are close to two main fresh water sources (Helleh and Mond rivers), and these phenomena can be somehow related. The average length at 50% maturity varies inter- annually and is estimated to be 15.3 Cm. Length-frequency distribution of shrimps by sex reveals 1 to 3 modes depending on the month and year. In southern part a more complicated and less consistent pattern of recruitment and growth between years was observed. There is multiple or/and continuous recruitment especially during summer months. The von Bertalanffy growth parameters were estimated. The Findings are used to design new sampling schemes to cover the whole life cycle of this species enabling one to explain the variations in their response to the environment and fishery. The results of this study, lead us in building appropriate assessment and management models.
    Keywords: Fisheries ; Iran ; Bushehr ; Penaeidae ; P. semisulcatus ; Monitoring ; Green Tiger Prawn
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  • 110
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    Cryopreservation of sperm in Acipenser nudiventris, Huso huso, Acipenser stellatus and Acipenser persicus in the breeding season (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25097 | 18721 | 2018-08-22 07:19:46 | 25097 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Considering decrease in total catch of sturgeon & threat of extinction in their stocks, special measures might be adopted. Sperm cryopreservation is one of the suitable methods to prepare bank of frozen gamete for future use in artificial breeding in order to prohibit extinction of sturgeon stocks. This study carried out on 27 male sturgeon during 2001-2004. The investigated sturgeon include 12 male Persian sturgeon (Acipenser persicus), 7 male Acipenser stellatus, 5 male Acipenser nudiventris and 3 male Huso huso. Sperm Collected from spawners in Shahid Beheshti & Shahid Marjani sturgeon rearing & propagation Complex in Rasht & Gorgan. The Sperm which was collected from Shahid Marjani propagation complex placed in the sealed Vessels & transferred by coleman in near zero temperature to cryopreservation laboratory of international sturgeon research institute for further investigation. In this study, the sperm was diluted in ratio 1:1 in two culture media containing dimethyl sulfoxide & glycerol (BC) and the samples stored in 1 ml insulin syringe & 0.5 ml Piot. The diluted sperm froze in a special temperature by automated freezer model 5300 (France IMV). Three phases applied to freeze the samples which are as follow: 1- Begin to freeze from +50c to -100c (30c /min) 2- From 10 0c to 70 0c (20 0c /min) 3- From 70 0c to 130 0c (25 0c /min) after freezing, the samples placed in liquid nitrogen containers with 196 0c temperature. For thawing, the sperm samples took out of liquid nitrogen & placed in water 40 0c. Then motility percent & the sperm quality investigated under 400x microscope. According to the results the mean motility percentage of fresh sperm in Persian sturgeon, Acipenser Stellatus, Acipenser nudiventris and Huso huso was 84, 73.75, 67.5 and 76.66, respectively. The mean percentage of motility in frozen sperm which placed in media containing dimethyl sulfoxide was 32, 37.5, 40 and 20%, respectively. Also, the frozen samples that preserved in BC media (Biociphus) showed 5.2, 75.25, 4.11 and 2.66% motility, respectively. In blank group, the mean fertilization percent of eggs was 90, 72, 71.25 and 90%, respectively. In the treatment group applying frozen sperm in culture media containing dimetlylsulfoxide, the mean fertilization rate was 30, 6.5, 25.39 and 4.75%. Furthermore, no fertilization (0.0%) observed using frozen sperm stored in Biociphus culture media containing glycerol. There was no significant difference in fertilization percent comparing the two storage places (syringe & Piot). According to investigations the culture media containing dimethyl sulfoxide, is a suitable diluter for sturgeon sperm. So, the Cryopreservation technique can be used to preserve the sturgeon sperm for future fertilization & through this way we can prevent extinction of sturgeon stocks.
    Keywords: Biology ; Fisheries ; Iran ; Rasht ; Gorgan ; Cryopreservation ; Sperm ; Acipenser nudiventris ; Huso huso ; Acipenser stellatus ; Acipenser persicus ; Breeding ; Sturgeon ; Temperature ; Motility ; Fertilization ; Spermatozoa ; Freezing
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  • 111
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    Variations in sturgeon populations in the coastal waters of the Caspian Sea (Guilan province) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25106 | 18721 | 2018-08-23 05:36:01 | 25106 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The present study was conducted from autumn 2003 to summer 2005 with the objective to estimate distribution and relative abundance in different species of sturgeons as a function of seasons, and regions in the west coast of the Caspian Sea (Guilan province).Gillnets with a different mesh sizes (26, 33, 40, 60, 100, and 150 mm) were set up at different depths(2, 5, and 10 m) for 24 h. Data on variations in catch, catch per unit effort(CPUE) and length and age composition of sturgeon species were analyzed statistically. Data on CPUE in each region and depth and mean estimates of length and age in fish were reported for each season and each year of the study period. CPUE during 2004-2005 was 1.32 fish which was 30.1% lower than CPUE (1.89 fish) recorded in 2003-2004.CPUE for all species except A. nudiventris decreased during 2004-2005 as compared to that in 2003-2004. Acipenser persicus caught during 2003-2004 and 2004-2005 ranged from 15 to 45 cm in length and comprised 91.1 and 97.1% respectively of the total sturgeon catch. These fish belonged to the one year age class. Mean length recorded in sturgeon fish caught in 2004-2005 decreased as compared to that recorded in 2003-2004. Significant differences were recorded in total length of fish caught in 2003-2004 and 2004-2005. Results obtained from the present study reveal that the abundance of fish increased from west to east indicating a direct relationship between the general currents found in the Caspian Sea and the higher density of nutrients in the eastern region.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Guilan Province ; Stock ; Sturgeons ; Gillnets ; CPUE ; Fish ; Species ; A. nudiventris ; Acipenser persicus ; Length ; Nutrients ; Costal waters
    Repository Name: AquaDocs
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    Designing and establishment of ISO/IEC17025 in the research centers affiliated to IFRO the first phase: the Persian Gulf Ecological Research Center, Caspian Sea Ecology Research Center and Iran Shrimp Research Center (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25307 | 18721 | 2018-09-09 06:48:34 | 25307 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The plan entitled "designing and establishment of ISO/IEC17025 in laboratories of three research centers affiliated to Iran Fisheries Research Organization" was carried out in the frame of three projects from March 2008 for about three years. Among the laboratories of The Persian Gulf ecological research center, the Caspian Sea ecological research center and the national shrimp research center 7, 5 and 3 laboratories were selected for accreditation, respectively. The quality manuals of the test laboratories were written following the requirements of ISO/IEC 17025. During the establishment of the system standardization of the test methods, calibration of the equipment, test methods validation and update and improvement of physical conditions of the laboratories were performed. The technical and quality management competence of the laboratories affiliated to the Persian Gulf ecological research center were evaluated by the auditors from DGA (the German Accreditation System for Testing Laboratories), which is signatory of ILAC (International Laboratory Accreditation Co-operation). But in the case of the two other centers, the laboratories were accredited by Iran Accreditation System (IAS). The laboratories officially accredited, after the successful completion of the accreditation process (including implementation of corrective actions for the detected non-conformities). Production of reliable results of the test methods from national and international scientific organizations' point of view as well as facilitation in development of bilateral and multilateral relations with them can be considered as the advantages of the system establishment. Moreover, exchange of the relevant scientific information and experiences among the researchers will be facilitated.
    Keywords: Management ; Iran ; Persian Gulf ; Caspian Sea ; Bandar Abbas ; Sari ; Bushehr ; ISO/IEC17025 ; Shrimp ; Standardization ; Laboratories ; Fisheries ; Iran Shrimp Research Center ; Caspian Sea Ecology Research Center ; Persian Gulf Ecological Research Center
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  • 113
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    Status of lanternfish stocks & exploitation in the Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25313 | 18721 | 2018-09-08 16:46:10 | 25313 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The fishing data of 1814 hauls during 393 fishing day s activity (2008-2010) in the Oman Sea were collected from F/V Fanoos-2, Fanoos-3, Fanoos-3 and Fanoos-4. It was found that the total mean CPUE of pelagic fishes were 1903 kg/h of which 1bout 1115 kg/h (58%) belong to lantern fishes and the others belong to hairtail, bigeye croaker and threadfin bream with a total CPUE of 788 kg/h considered as by-catch. Also, the maximum CPUE of lanternfish were in months January to March with values of 2473, 2160, 2784 and 2198 kg/h. A comparison between years 2008, 2009 and 2010 show that the CPUE of lanternfish were 1356, 1148 and 936 kg/h, and for by-catches were estimated 1034, 854 & 581 kg/h, respectively; in which it shows a descending trend. The distribution pattern maps for different seasons were prepared and it was found that the density is decreased from spring to winter with a descending trend of CPUE from 4900 to 2500 kg/h. The catch statistics show that the fishing season including towing depth, position of fishing ground and engine power are the main parameters affecting on amount of catch. Also a comparison between different vessels show that the highest amount of catch belonged to F/V Fanoos-2 with a CPUE of 2233 kg/h higher than the F/V Fanoos-3 with a CPUE of 1893 kg/h; and this value was estimated 1111 & 772 kg/h for vessels Fanoos-5 and Fanoos-6 as the lowest ones. On the other hand, the feeding regime of Pennahia anea was studied. A total of 188 specimens were seasonally collected; and different food indices such as VI, FI, FP, GaSI and food frequency were calculated. The annual mean GaSI was 1.1; and the average VI was 78.7% and the food preference was identified as Fishes (77%, main food), Crustaceans (19%, minor food) and Molluscs (4%). The Trichiurs lepturus (hairtails) were identified as the other main predator including Purple-back flying squid. The aging of Benthosema pterotum was done using sagitta otolith and the mean age was found about 349 days and it was proved that they have a short life span with less than one year old. The growth rate (mmd-1) of lanternfish has negative correlation with increase of body size and body weight.
    Keywords: Fisheries ; Iran ; Oman Sea ; Lanternfish ; Fishing ; CPUE ; Pelagic fishes ; Depth ; Pennahia anea ; Specimens ; Molluscs ; Trichiurs lepturus ; Hairtails ; Benthosema pterotum
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    Review of management and monitoring of two crop shrimp production of Indian white shrimp Fenneropenaeus indicus in intensive culture system in Guatr Shrimp Farm, Sistan & Baloochestan Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25312 | 18721 | 2018-09-11 09:00:21 | 25312 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In line with the implementation of two Crop shrimp culture in year in Gwater shrimp Farming Site credits UNDP aims to increase production of crops per year, reducing the days of culture in the second crop using the nursery pond, control feed conversion ratio (FCR) and production management, Farming of Indian white Shrimp P.indicus in 4 private farm was done in 2008. Surveillance and monitoring of these farms, the possible obstacles to the harmful effects of management strengths and weaknesses and develop in the future was done in corporation of Offshore Fisheries Research Center of Chabahar and fisheries of Sistan and Balouchestan. First crop was successful, but the shrimp of Nursery pond and second crop due to the occurrence of white spot disease (WSSV) disease and casualties were died and did not actually do the work. The average minimum and maximum feed conversion in Culture period 1.46 and 1.96 respectively, in C2 _31 and C2 _ 14 farms were observed. Maximum production was 41,376 kg in farm C2 _31. The rainfall on 14 August severe flooding and water supplying cussed suddenly fall down of Inland channel water salinity at day 16-20 the August to 4-5 PPT and the PH go up to 8.8-9. After 2 days the white spot disease in South of site was confirmed and was transferred immediately to the north of site. (The pilots farm) The important thing was that the farm under two crop system as a last resort so that all First crop harvest but shrimp in Nursery pond were infected and with veterinary supervision of all infected ponds were then killed. The results showed that shrimp farming can be done in two periods in year with a predetermined .In this study the only factor that could have adverse effects on the project was Feed supply problems during the growing period and the consequences that it caused low average body weight and final harvested Shrimp resulted to delay in daily growth.
    Keywords: Aquaculture ; Iran ; Sistan and Baloochestan ; Chabahar ; Gwater ; Intensive culture ; Indian white shrimp ; Fenerropenaeus indicus ; UNDP ; Crap culture ; Culture ; FCR ; P.indicus ; Fisheries ; White Spot Disease
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  • 115
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    Stock assessment of the bony fishes of Golestan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25120 | 18721 | 2018-08-26 13:27:08 | 25120 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Total catches of bony fishes in the coastal of south Caspian Sea have been ended to 1554 ton in 1382. The catch of common carp Cyprinus carpio as a one of important commercial species has been lower than others species such as mahisephid, kolmeie and kafal. From commercial catch point of view, the catch of kolmeie is not very important, so that its catch was included only 2% of total bony fish catch in three provinces which are located in south of Caspian sea . In spite of lower common carp catch, in comparison with total bony fish catch in Golestan province more thanb70% catch was belong to Common carp. The higher catch kolmeie among three provinces was related to Guilan with 46% of total catches. Seasonal changes of common carp catch showed maximum and minimum catch were in April 83 and December 82 respectively. The most of (CPUE) was in April 83 and September, October 82. The trend of kolmeie catch showed low fluctuation. Three age groups were specified in kolmeie age composition high and low percent observed in 2 and 3 age groups respectively. Result of biometric information common carp showed most of catch was under standard fisheries catch.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Golestan province ; Stock assessment ; Bony fishes ; Common carp ; Cyprinus carpio ; Species ; CPUE ; Biometric ; Fisheries
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    The biological study of Coregonus lavaretus of the lake of Karaj Dam (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25139 | 18721 | 2018-08-26 16:57:20 | 25139 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Coregonus lavaretus is one the important species of coregonidae family. It has adipose fin and the tail fin has a deep notch. The fish is special for fresh and cold north waters and are mainly found in north hemisphere and north of Europe, Asia and America. It feeds aquatic invertebrate and zooplanktons. The mentioned species has tasteful meat and supplies the major part of fish consumption. The big fishes meat is tasteful, low fat and has a cucumber like odorous characteristics and is mostly consumed in dried and smoked forms. Since this fish is important in inland fisheries and is releasable and developing in water sources of lakes behind dams has been considered and respect to purity of water resources behind dams. In the lake of Karaj dam has been considered as the only habitat and considered to have to low biological information from October to late march 2001 for 6 months totally 82 samples were caught and studied and through this way lack of fishing in the region by determining 11 stations, the samples were collected and grown, relation between length and weight, age and length, propagation, nutrition and fertility parameters were evaluated. Most of caught fishes are 4 to 5 year olds and 3 and 4 year olds. The 4 year olds males were majority and 5 and 6 year olds females formed the dominant group. Correlation relation between age and total length in both sexes (male and female) was very significant at 1% level, of course in females the correlation was around 100%. The weight and total length in males and females that was caught both had high correlation at 1%level; of course this correlation in females had been very stronger than males. % level related to gonad weight and sexual evolution stages of females. Gonad had correlation at 5 the most absolute fecundity had belonged to 5 year old female with 19120 ovules and the lowest to 4 year old breeder. With 11496 ovules the most relative fecundity was 62.13% and belonged to 5 year old breeder and the lowest was 36.06% belonged to 4 year old breeder by increasing the quantity of ovules in breeders the sixth stage of sexual evolution the fecundity rate has been directly increased as well. % of Gonad weight was the most effective factor on absolute fecundity and according to (R2) more than 90 variations of breeders; absolute fecundity is claimable by their gonad weight. Among all traits, affecting gonad weight fecundity the breeders sexual evolution stage has been recognized the most effective factor on fish ovules diameter. Generally in oligotrophic aquatic resources they become mature before the age of 3 and in utroph aquatic resources and full of edible zooplanktons they become mature with 2 years of age. In respect to nutrition this fish eats a broad range of zooplanktons separated from surface to bed of water of dam lake and no kind of selection was seen there so that in different ecological condition it can differ appropriately to kind of foods available in different seasons so that in cold months (December to March) the food diet of this fish varies toward eating water bed living things such as tobifex.
    Keywords: Biology ; Iran ; Karaj Dam ; Coregonus lavaretus ; Species ; Coregonidae ; Aquatic ; Zooplanktons ; Fishes ; Fisheries ; Samples ; Gonad ; Evolution ; Fecundity ; Breeders ; Zooplanktons
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    Stock assessment of zobaidy, Pampus argenteus, in the north of Persian Gulf (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25157 | 18721 | 2018-08-26 17:12:28 | 25157 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The project “Stock Assessment of Zobaidy, Pampus argenteus, in the North of Persian Gulf” started in April 2003 and completed by the end of April 2006 as a cooperative research project to assess the valuable stock of zobaidy shared between Kuwait and Iran in the North of Persian Gulf. The main objectives were to investigate and determine the basic biological parameters, the standing biomass, seasonal abundance, and the impact of regional fishery activities. These studies are necessary to recommend practical management policies and measures for long-term sustainability of the zobaidy stock. The sampling of fisheries data (catch, effort, fish length distributions, and biological data) was started in May 2003 and ended December 2006. Monthly length frequencies data were collected from both the drift gill net and shrimp trawl fisheries. Age determination was based on otolith sectioning, polishing, etching, and staining method. The age groups ranged from 0 to 10 yrs but the dominant age groups were 1-3 years and the estimated parameters for both sexes were L_∞ = 32.0-36.0 cm FL and K = 0.26-0.30 yr^-1, females grow faster than males. Sea survey on board of two dhow boats was carried out using swept area method. Higher abundance was always obtained in Kuwait Bay rather than the other areas surveyed in Kuwait and Khuzestan waters. The total estimated stock biomass in the surveyed areas varied from 42 t in January 2004 to 2,633 t in November 2004, while the Iranian biomass varied from as low as 19 t in October 2005 to 295 t in November 2003. The data indicated that Ras Al-Gaid, Bubiyan Island is the main nursery area in Kuwait waters, while Lifah, Busaif, and Bahrakan are important nursery areas in the Khuzestan waters. Kuwait Bay and Khor Musa are considered important spawning grounds and should be protected. Yield per recruit analysis showed that higher yield could be gained with increasing fish effort, which is not recommended under the present status of high exploitation rate. In contrast, virtual population analysis indicated that future catches will reduce if the fishery continues with present level fishing effort. A reduction of 50% would be required to maintain the present level of catches as well as to enhance the stock biomass. Formulation of a joint advisory management committee would be advisable approach to manage and monitor the zobaidy stock in the region. This will need commitment from the three countries in the region for data collection on regular basis on length frequency, statistics, and biological data. Copepods with high occurence of 64% - 88% is considered as the main item in the Pomfret fish, while jelly fish and other decapods crustaceans are considered as minor items. Observation of pre- flexion stage larvae of pampus genus among the specimens collected from Khuzestan coast water could be considered as an evidence for the spawning of this fish in this region. The occurrence of pampus larvae in Khuzestan coast during the months of June to October has been reported for several times. Examination of 101 specimens (38 from Kuwait, 63 from Iran) for molecular survey does not show any significant differences between Kuwait and Iran water stocks for this fish, so it is possible to hypothesize a unit population for zobidy stock in Persian Gulf and Oman Sea as whole.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Kuwait Bay ; Khuzestan Province ; Pampus argenteus ; Zobaidy ; Stock assessment ; Growth ; Food ; Molecular study ; Biomass ; Fishery ; Sampling ; Survey ; Population
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    Production of fish cheeses from silver carp by acid coagulation (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25162 | 18721 | 2018-08-26 17:33:11 | 25162 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Fish and fishery products have high nutrition value particularly omega-3 fatty acids. It is expected that the estimated production in 2030 will be 150 to 160 million tones but estimated demand will be 183 million tons. Processing of fish especially (culture fish) is one of the way attentions of people to fish and fishery products. Fish Finger, Fish Berger, Cracker, Fish Ball are the most important of fishery products. In this research was studied production of fish cheese from Silver carp (Hypophthalmichthys molitrix) from sarcoplasmic proteins. After primary preparation of fish (beheading, cutting, filleting and deboning) minced fish was washed with salt solution (0.01, and 0.04 mol) and were isolated sarcoplasmic proteins. Acetic acid (%5) and centrifuge were used for sedimentation and extraction of these proteins. Fifteen formulas were worked for preparing of fish cheese. Minced fish, sedimented protein and fish cheese were examinated for proximal parameters (protein, ash. moisture, carbohydrate and lipid) and microbial and chemical spoilage factors (Total Viable Count, Mold and Yeast, Total Volatile Nitrogen, and Peroxide Value). The shelf life and organoleptic characterization of fish cheese were also surveyed. The results indicated that mean of protein, lipid, ash, moisture and carbohydrate in fish cheese were %14/86, %28/01, %3/46, %48/27, %4/78 respectively. The best formula was treatment of 13 with %18/26 of protein. TVN and PV, in fish cheese, were at standard level but after 30 days stored in 4o C, PV value ere slowly increased. Microbial parameters, in product, (in zero time) were log 3 and 4 but after 30 days were log 4 and 5. Organoleptic factors such as odor, frangibility, taste in fish cheese in zero and 30 days were good and medium respectively. Cost of fish cheese was varied between 2000 to 27000 Rails. As fish cheese is prepared from sarcoplasmic proteins and was not any use from fish tissue, therefore it can be produced as secondary products in processing plants and can be introduced to people as new fish product.
    Keywords: Fisheries ; Iran ; Fish cheese ; Sarcoplasmic protein ; Silver carp ; Acid coagulation ; Hypophthalmichthys molitrix
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    Extraction of fatty acid Omega-3 from kilka oil (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25167 | 18721 | 2018-08-26 17:40:46 | 25167 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Kilka fish oil has omega-3 fatty acids and these acids have inhibitory on coronary disease. Unfortunately, any study about improvement use from Kilka oil. In this study, extraction of omega-3 fatty acids from Kilka oil was evaluated in bench scale. Extraction and purification of raw and refinery Kilka oil were done in three temperatures (1 ºC, -5 ºC and -10 ºC) by urea complex method. The results showed that the maximum extraction of fatty acids were in 1oC. Mean of omega-3 extraction in refinery and raw fish oil were29.28% and 26.05% respectively and after extraction and purification were increased to 79.8% and 68.9% and pure maximum of fatty acids were also 80.5% and 69.29%.respectively. The statistical analysis showed that value of omega-3, before and after extraction and purification, have been significant different (p〈0.04 for raw and p〈0.03 for refinery fish oil). Value of C18:3, C20:3 and C22:6 in refinery oil, after extraction and purification, were increased from 2.37%, 6.94%, 19.55% to 7.31%, 18.83% and 53.47% respectively. Value of saturated fatty acids and undesirable menstruated fatty acids with long chain including C16:0, and C18:1, after purification, were decreased from 22.4% and 28.1% to 3.5% and 5.5%respectively. The conclusion showed that fatty acids purification by area complex has had successful and have potential in pilot scales.
    Keywords: Fisheries ; Iran ; Oil fish ; Kilka ; Extraction ; Omega-3 ; Urea complex ; Fatty acid ; Temperature
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    Determination of pollution condition in Babolroud River from viewpoint of pesticides and agrochemicals fertilizers (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25474 | 18721 | 2018-10-02 10:41:14 | 25474 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Babolroud River is one of the important rivers for fisheries and environmental aspect that locared in center part of Mazandaran province. The river has a span of 92 km starting from Albourz mountainous and end up at the southern part of Caspian Sea. This study was done for five months (3rd Feb. through 5th July, 2008) for the better understanding of pollution situation such as organophosphorous, organochlorine pesticides and agrochemical fertilizer that drainage from paddy fields and horticultures to the river. A total of three main sites for pesticides and plus five sub-sites for drainage were selected for observation in three different regions of the river (mountainous, plain and estuary). The organochlorine and organophosphorous pesticides measured by GC (ECD and TSD detectors) with US-EPA (508) and AOAC procedure and agrochemical fertilizer parameters were measured by ASTM method. The maximum concentrations of aldrin, lindane, heptachlor epoxyde, DDE and β- BHC (period 1), δ- BHC and endrin (peiod 2), heptachlor and DDT (period 3), α- BHC (period 3 & 4), dieldrin (period 4) were 6.02, 0.85, 0.51, 0.50, 0.22, 0.35, 0.23, 0.50, 0.46, 0.19 and 0.16 µg/l, respectively. The maximum concentrations of four components of organophosphorous such as Diazinon and Chlorpyrifos (period 1), Malathion (period 2), Azinphos methyl (period 3) were 1.36, 0.46, 0.44 and 2.56 µg/l, respectively. The maximum amounts of tree components of parameters of agrochemichals fertilizers indictor such as total nitrogen (period 2, sub-site 5), total phosphorus and orthophosphate (period 4, sub-site 5) and organo-phosphorus (period 3, sub-site 4) were 5990, 1290, 1220 and 336 µg/l, respectively. The maximum concentrations of organochlorine pesticides components in sediments of the river such as lindane (period 2, site 2), δ- BHC (period 1 site 3), α- endosulfan (period 1, site 2), endrin and heptachlor epoxide (period 2, site 2) and DDE (period 2, site 1) were 0.99 0.54, 0.29, 0.19 and 0.19 µg/l, respectively. The maximum concentrations of organochlorine pesticides components in fish tissue of the river such as endosulfan sulfate, lindane, endrin, δ- BHC and DDE were 0.32, 0.29 0.27, 0.25 and 0.21 µg/l, respectively.
    Keywords: Pollution ; Iran ; Caspian Sea ; Albourz mountainous ; Mazandaran province ; Babolroud River ; Organochlorine ; Organophosphorus Pesticids ; Pollutants ; River Fish ; Sediments ; Pesticides ; Fertilizers ; Fisheries ; α- endosulfan
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    Feasibility study of developing puffed snack from trimmed part of silver carp (Hypophthalmichthys molitrix) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25491 | 18721 | 2018-10-05 06:56:40 | 25491 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Incorporation of silver carp (Hypophthalmichthys molitrix) meat in extruded puffed corn-fish snack was studied. Fish protein concentrate (FPC) was produced by liquid-solid extraction. Ethanol and isopropanol were used as the solvents. FPC extraction efficiency of 19.5% and 9.5% (w/w) were obtained based on fish meat and whole fish respectively. Protein content of isopropanol extracted FPC (93.3%±0.4) significantly (P〈0.05) was higher than ethanol extracted (92.5%±0.3) FPC. On the contrary fat contents were 0.17%±0.4 and 0.65%±0.11 respectively. Puffed corn-fish snack with 2 and 4% FPC as well as 5, 10, 15, and 20% minced fish meat in corn grits was extruded by a single screw extruder. The best formula was evaluated at 15% fish meat and 85% corn grits in the snack base, considering higher protein content, higher consumer acceptability, higher expansion ratio and lower fish smell. Six month storage stability “same as control” was obtained considering chemical, microbial and sensory evaluation according to standard of Institute of Standards and Industrial Research of Iran; when Metalized Biaxillary-Oriented Poly Propylene was used as the packaging material. Incorporation of abdominal muscles (8% of whole fish body which obtained from trimming of fish fillets) on corn-fish snack was not feasible due to low-protein (11.7±0.1 i.e. 34% less than fish meat) and high-fat (14.2±0.1 i.e. 550% higher than fish meat) contents.
    Keywords: Aquaculture ; Fisheries ; Iran ; Snack ; Fish ; Silver carp ; Fish Protein Concentrate ; Extrusion ; Feasibility ; Hypophthalmichthys molitrix
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    Evaluation the tilapia meat freshness during storage in ice and refrigerator by Quality Index Method (QIM) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25500 | 18721 | 2018-10-05 07:49:32 | 25500 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study, measurement of freshness fish tilapia species) Nile Tilapia (Oreochromis niloticus) by Quality Index method in whole fish in the 4 treatments and fillets in 6 treatments intended purpose of this research is to measure the qualitative factors (sensory , chemical and microbiological evaluation) and the ratio of 3 to 1 (Ice- fish) ice cover was (mean temperature in fish during the study period between 0.1±0.05 to 0.2±0.1 °C) were kept at cool temperatures for 10 days for the measure fillet Recently, 100 fish (50 pieces, 50 pieces of black and red) and washed her head and tail, the skin and the fillet 30 for each treatment in each treatment 3 Normal packing, vacuum and modified atmosphere (Tilapia fillets treated for red and black tilapia fillets 3 treatment) with an average weight of 114.5±22.50 grams packed and refrigerated at 3°C was maintained. The results showed maximum retention time for fish stomachs empty and whole fish respectively was 9 and 7 days. Also for tilapia fillet freshness in 3 different packaging and stored at -3°C, showed fillet packaged in MAP, has the most lasting, and results by the analysis Statistical was significant .
    Keywords: Fisheries ; Iran ; Tilapia ; Freshness ; MAP ; Modified atmosphere packaging ; Packaging ; QIM ; Quality index method ; Oreochromis niloticus ; Nile Tilapia ; Evaluation ; Meat ; Quality
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    Road-map of aquatic-food processing development of I.R. of IRAN (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25497 | 18721 | 2018-10-05 07:12:46 | 25497 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Scientific and practical planning for achieving the lofty goals of the Islamic Republic of Iran in the framework of development plan of 1404 is the requirement to achieve sustainable development. Establishing roadmap of industries and products was considered by the scientific and technology office of the deputy president, in order to achieve the abovementioned objectives and in line with the national scientific comprehensive map. Therefore, present study was conducted as the roadmap of national aquatic-food processing development using available approved documents e.g. Iran perspective of 1404, fifth developing plan of I.R. of Iran, developing plan of Iranian fisheries organization in 1400 and the available approved statistical data. Current perspective of the aquatic-food processing is presented at the first chapter of the study. The second chapter reviewed the problems and obstacles. Third chapter tabulated the published studies and researches in fish handling and processing so far. Finally fourth chapter recommends executive and research projects considering quantitative and qualitative objectives of Iran 1400 plan as well as fifth developing plan of Shilat-Iran (Iranian fisheries organization). Authors hope the study to be useful in the national planning of I. R. of Iran in the future.
    Keywords: Fisheries ; Management ; Iran ; Road-map ; Aquatic ; Fisheries
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    An investigation of annual discards of the trawlers and gillnet in Khuzestan coastal water, northwest Persian Gulf (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25532 | 18721 | 2018-10-05 15:42:41 | 25532 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The main objective of this study was to describe and estimate the seasonal pattern of discarded fish in the waters of the Persian Gulf coast in Khuzestan. Data were collected from the fishing dhow with Khuzestan Fisheries partnership in fishing areas of Lifeh, Boseif, Khure-mussa and Bahrakan from October 2011 to September 2012. Discarded fish samples were included 109 species from 67 families, nearly 40 percent commercial and 60 percent of non-commercial species. Rayfish and catfish have been observed in most fishing nets. Average sizes of most species particularly bony fish were under 15 cm. The amount of discarded fish per unit of fishing effort was not significantly different between seasons. The highest portion of the catch belongs to rayfishes. Total discarded fishes of gillnets were estimated 3162 tones. Total weight of commercial fishes with small size in discarded fish was estimated 225 tones. The rate and ratio of discarded fish in total catch of gillnet was estimated 0.23 and 0.31 respectively. Chondrichthyes with 12 species and 60% of gillnet catch has the highest percentage of discarded fish of gillnet. High number of commercial species with small size could be due to nursery role of Khuzestan coastal waters. Trawl net has more impact on type and amount of discarded fish than moving gill net. According to different aquatic groups, the highest percentage of protein (77.84±2.088) in Perciformes belongs to Eupleurogrammus muticus and the lowest percentage (40.40±0.322) belongs to Liza klunzingeri, the most percentage of lipid was in Liza klunzingeri (33.78±0.277) and the lowest percentage was in Grammoplites suppositus (3.34±0.025), the highest and lowest percentage of ash (minerals) were in Cynoglossus arel and Acanthocephola abbreviate (28.14±.377) and oligo duvauceli (0.7±0.02) respectively. Therefore discarded fish have great potential in fulfilling nutritional requirements as fresh food (minimally processed) and with nutritional additives in forms of fish powder and fish oil and it can play an effective role in aquaculture development in the region.
    Keywords: Fisheries ; Iran ; Persian Gulf ; Khuzestan coasts ; Discarded ; Species composition ; Fishing ; Net ; Carcass ; Eupleurogrammus muticus ; Liza klunzingeri ; Oligo duvauceli ; Cynoglossus arel ; Acanthocephola abbreviate ; Grammoplites suppositus
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    A survey on black mouth Croaker (Atrobucca nibe) resources in the north-west of Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25531 | 18721 | 2018-10-05 15:27:32 | 25531 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Blackmouth croackers (Atrobucca nibe) resources are the most important commercial stocks in the north-west of Oman Sea, exploited as lantern fisheries by catch with trawlers vessel. At least 50 specimens were sampled monthly from September 2012 to July 2014. Results showed blackmouth croacker have several small peak in gonado-somatic index, but the most frequency of adults occurred in May. The female: male ratio was calculated 1:0.8 and the LM_50 was estimated at 35 cm. The mean of absolute and relative fecundity were estimated 92988 and 223 respectively. LM_50 and LC_50 were calculated and the results showed this species mainly caught before length of maturity, and the mass populations have not sufficient opportunity to reproduction. The mean of egg diameter for black mouth croaker were calculated at 533±103. Linear model of Fecundity= 9597.6TL-233880 was calculated for length-fecundity relationship . Results of feeding showed lantern fishes (65%), shrimps (11%), Japanese threadfin bream (13%) and the other fishes (11%) were the main feeding regime of black mouth croaker. This species was carnivore, the food prefect mainly consisted of lantern fishes (57.7%) and shrimps (28.2%). The vacuity index (87.7 %) indicated this spices was low appetite fish. Total length range was 18 to 47.5 cm with mean length of 28.7 cm, and the class of 23-24 cm was the most frequent length in fishing ground. The length-weight relationships in A. nibe were calculated for female and male W= 0.0121L2.9385 and W= 0.0075L3.0737 respectively, both have isometric growth. Growth parameters of L_∞ and K were estimated 50 cm and 0.2 y^-1 respectively. Parameters of t0, Tmax and Ǿ were calculated -0.7 year, 14 year and 2.69 respectively. This species have two recruitment period, and the peak of recruitment was occurred in May with 23.14 percent. Total mortality , natural mortality and fishing mortality rates were calculated 0.53 y^-1, 0.46 y^-1 and 0.07 y^-1 respectively. Due to the calculated exploitation rate (0.13), it is appreciated the improvement of black-mouth croaker in the Oman Sea. Base on seasonal and monthly CPUE it was resulted the peak of fishing density were occurred in the winter. Results showed the main distribution of black-mouth croaker concentrated on the continental slope in 200 m depth, but these stocks move to deeper waters (more than 200m) in warm season and extend to shallow waters (less than 200m) in winter.
    Keywords: Biology ; Fisheries ; Iran ; Oman Sea ; Atrobucca nibe ; Reproduction ; Feeding ; Growth Parameters ; Mortality rates ; Exploitation rate ; Distribution ; Survey ; Black mouth Croaker
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  • 126
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    Survey on stocks of Caspian Sea mullets (Liza aurata; Liza saliens) in Iranian coastal waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25565 | 18721 | 2018-10-05 16:56:00 | 25565 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to determine growth parameters, catch and fishing effort trends, stock assessment and Acceptable Biological Catch (ABC) of Caspian Sea mullets in the Iranian coastal waters of Caspian Sea in the fishing season of 2012-2013. For gathering of data on biometry and catch statistics, 5 mobile working group in the regions of Anzali, Kiashahr, Nowshahr, Babolsar and Torkmen were involved from the start to the end of fishing season.Gathered data Were entered to the computer. For data analysis, common methods were undertaken for estimation of growth parameters, mortality rates, biomass and Maximum Sustainable yield (MSY) and Acceptable Biological Catch (ABC) as well. According to the result, the number of beach seines cooperatives was 124 and fishing efforts were 45260 beach seining haul. The catch per unit of effort CPUE) was calculated 37 kg/haul during this fishing season. The total catches of Caspian Sea mullets (including illegal fishing estimated as 2151 mt. Growth parameters of golden gray mullet (Liza aurata) were estimated as K=0.12 /yr, L_∞=59.24 cm, t_0 = - 1.31 /yr. Based on catch-at-age data, in the fishing season of 2012-2013 , the total biomass, from the biomass-based cohort analysis were estimated 11321.6 mt. The reference points of F0.1 and F30% were estimated 0.3 /yr . based on these results , the fishing mortality rate in fishing season of 20122013 were very closed to these reference points. In this survey , the Maximum sustainable yield and Acceptable biological catch were estimated as 2207.7 and 1981.4 mt respectively .Results of biometry of leaping gray mullet (Liza saliens) showed that the mean length and weight of this species were 28.8 ± 3.4 cm and 230.5±74.8 g respectively. Based on these results and due to decline of golden gray mullet stocks, it is recommanded to reduce fishing effort and harvest keep to the level of MSY and ABC .The study of spawing condition of golden gray mullet in new situation of this species is also recommanded.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Anzali ; Kiashahr ; Nowshahr ; Babolsar ; Torkmen ; Mullet ; Growth parameters ; Biomass ; Acceptable biological catch ; Survey ; Stocks ; Liza aurata ; Liza saliens ; Mortality rates ; CPUE ; Illegal fishing ; Golden gray mullet ; Spawning
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    Investigation on the effects of different batters on quality of breaded kilka (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25584 | 18721 | 2018-10-07 11:23:15 | 25584 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The aim of this study was investigated to produce of new product using by Caspian Sea Anchovy (Kilka) with different sensory and textural properties .To achievement this purpose, breaded kilka was coated ( row and fried) using with common and Tempora batter. For determination of quality assessment and shelf life, samples were stored at freezer (-18°C). Results showed that frying of Breaded kilka affect total fat content and moisture, so that significant reduction in moisture value and increase in fat content of fried kilka was found in compared with raw breaded kilka (p〈0.05). Protein content of both treatments in compared with fresh fish meat was significantly different. Comparison of four treatments showed that a significant increase in the amount of peroxide, thiobarbituric acid and free fatty acids in fried kilka samples which indicates high fat oxidation during the frying process. Also total count of microrganisms and Coliforms was reduced after frying process. According to ICMSE Standard, all of samples had a high quality at processing time. According to the results, using of Tempora batter improved sensory properties of breaded kilka. Difference of taste, tenderness and adhesiveness of two types of batter in products was significant (p〈 0.05) as the sensory properties of breaded kilka with Tempora batter in compared with common batter were high in different phase of storage. with due attention to progressing of oxidative deterioration in breaded kilka at forth months after production and decreased of sensory properties, we found that the shelf life of row , fried breaded kilka was 3 month at frozen condition (-18°C).
    Keywords: Ecology ; Fisheries ; Iran ; Breaded Kilka ; Tempora batter ; Heating process ; Nutritional value ; Chemical and microbial quality ; Sensory evaluation ; Shelf life ; Investigation ; Quality
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    Providing brood stocks of Caspian trout (Salmo trutta caspius) from Mazandaran Rivers and production of one hundred thousand fries (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25602 | 18721 | 2018-10-07 16:25:19 | 25602 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Caspian trout (Salmo trutta caspius) is one of valuable fishes of the Caspian sea for people living in the Northern coastal area of Iran. Since fish stock and natural resources protection is one the Iranian fisheries research objectives, the most activity on Caspian trout rehabilitation was focused on releasing thousands of smolts in the rivers discharge to Caspian Sea. Catch statistics of this species has declined over last decades thus this study on quality of provided brood stocks and producing fries with suitable quality can help rehabilitation and rearing of this valuable species. Several rivers were considered for providing brooders to keep genetic resources variety of sea stocks. In spawning season 25 (9 male, 16 female) and 30 (5 male, 25 female) brooders were collected from fishermen in Mazandaran rivers and Gyilan coasts provinces respectively. After propagation and larvae rearing, 11500 (10-15 g.) and 50000 (less than 10 g.) juveniles were released in Gyilan and Mazandaran rivers respectively.
    Keywords: Aquaculture ; Management ; Iran ; Caspian Sea ; Mazandaran Province ; Guilan Province ; Caspian trout ; Salmo trutta caspius ; Brood stocks ; Rehabilitation ; Fisheries ; Species ; Rearing ; Genetic ; Propagation ; Juvenile
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    Determination of gill-net selectivity for Narrow-barred Spanish mackerel (Scomberomorus commerson) using morphometric parameters in the coast of Hormozgan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25786 | 18721 | 2018-10-13 08:38:39 | 25786 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this research, size selectivity for narrow-barred Spanish mackerel (Scomberomorus commerson) and other species such as Indo-Pacific king mackerel (Scomberomorus guttatus), Longtail tuna (Thunnus tonggol),Kawakawa (Euthynnus affinis), Talang queenfish (Scomberoides commersonnianus) and John's snapper (Lutjanus johnii) were investigated in mesh sizes of surface, mid-water and bottom drift nets in coastal waters of Bandar Abbas and in the western part of Hormozgan province (fishing ports of Gong and Bustaneh), as well as of catch composition from the fisheries. The data required for the relevant analysis was collected for the years 2012-2014. In order to determine the size selectivity of the investigated species, cumulative probability distributions of retention girth (operculum and maximum girth) at length was used. The results indicated that there is a linear relationship between length (fork length or total length) and transvers morphometric parameters in six positions of girth at fish species. Seven types of gillnets with stretched mesh sizes of 70, 76, 79, 101, 114, 132 and 165 mm and different technical characteristics were investigated for size selectivity of S. commerson, in which the optimal length were 38, 44, 49, 63, 74, 86 and 100 cm FL in the respective meshes. The capture processes of S. commerson was mostly in wedging in the all mesh sizes, whereas in the other species, depending on the morphology of fish, the retention method was different. The comparison of length frequency distribution of kingfish with mean length at maturity (Lm50%) indicated that, depending on mesh size, the frequency of the immature fish in the catch was between 4 and 100%. On the basis of optimal length at mesh size, the minimum legal mesh size of kingfish was estimated as 162 mm. Size selectivity curve was also represented for other species, which depending on fish morphology the model was inadequate in fitting the data. The results from the catch composition showed that the species diversity is different by fishing method. In mesh sizes of 70, 76 and 79 mm, the kingfish was captured in target and bycatch species depending on time by the surface drift gillnet fishery operated by the fishing boats. In this type of gillnet fishery, bycatch accounted for more than half of the total catch in which some of the species was important economically. Catch composition in gillnet fishery operated by dhows was different depending on fishing method. At the first step, it is necessary to impose a ban on gillnets with mesh sizes of 70, 76 and 79 mm in second half of the year. In the next step, for establishing the regulation on minimum legal mesh size of kingfish, it needs to do further study in seas trails aimed at determine the appropriate mesh size. Also, in the multispecies fishery, it is necessary to do a research for optimization of mesh sizes of gillnets and to implement minimum legal mesh size for the main target species.
    Keywords: Fisheries ; Iran ; Hormozgan provivce ; Size selectivity ; Narrow-barred Spanish mackerel ; Optimal length ; Morphometric ; Parameters ; Bycatch ; Scomberomorus commerson ; Gillnet
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    Pelagic shark/swordfish drift gill net fishery: management information document (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/242 | 8 | 2020-08-24 03:42:30 | 242 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-27
    Description: In 1977 a new fishery began to develop off the coast ofsouthern California. Long gill nets, drifted near the surface in the deep offshore waters, were being used successfully in landing pelagic sharks, primarily threshers. Recent increases in the retail demand for fish had led wholesale buyers to look for new sources of fish protein. Shark meat looked promising to many buyers. Aided by the public's rekindled fascination for sharks, the timing seemed favorable for introducing sharks as food. Word spread that wholesalers were willing to pay a good price for sharks. This created what appeared to many commercial fishermen to be the beginning of a bonanza.The new shark fishery grew rapidly. The number of vesselsengaged in offshore drift gill net operations grew from about 15 in 1977 to approximately 230 by 1984.Fishery biologists have expressed concern over the rapidexpansion of the commercial shark fleet. Historically, sharkfisheries have tended to decline after their initial success, due principally to slow growth and reproductive rates which seem to characterize sharks as a group. Perhaps the new thresher shark fishery might also be subject to a similar decline.Biologists were not the only ones who looked on the newindustry with concern. Among sport fishermen and conservation groups, rumors of marlin, whales, and seals taken by the hundreds became commonplace.Concern spread among the traditional swordfish harpoonfleet that landings by drift gill nets might glut the swordfish markets, driving prices down to the point that harpooners could no longer compete. Some harpooners voiced fears that drift gill nets might even overfish the swordfish stocks, causing serious declines in the availability of fish.Some conservation groups sought to ban the use of all gillnets, feeling that gill nets are inherently indiscriminant in what they catch and that the benefits derived from their use is always over-shadowed by the waste of marine life resulting from their use.In September of 1980, the Legislature enacted Assembly Bill2564 (Kapiloff), which directed the Department of Fish and Game to conduct a study of the drift gill net shark fishery. The purpose of the study was to determine what impact the use of drift gill nets might have on existing fisheries or upon other members of the local marine community such as whales, dolphins, and seals. The final report of that study "Pelagic Shark/Swordfish Drift Gill Net Fishery Management Information Document" was sent to the California Legislature in January 1983.In September 1982, the Legislature enacted Senate Bill 1573(Beverly), directing the Department of Fish and Game to continue monitoring the drift gill net fishery. It also directed, that a further study be conducted on the status of the thresher shark and swordfish resources off California and on the effects of the fishery on other resources. A report on this study would be prepared and delivered to the Legislature on or before January 1, 1985. The study was conducted. This is the report on that work. (77pp.)
    Keywords: Management ; Fisheries ; Biology
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    Status of the spawning biomass of the Pacific sardine, 1981-82 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/288 | 8 | 2010-12-14 15:34:09 | 288 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: State law requires that the population of Pacificsardines, Sardinops sagax caeruleus, must reach aminimum spawning biomass of 20,000 short tons beforeinitiation of a fishery. Data from ichthyoplanktonsurveys, the anchovy live bait fishery, sea surveycruises, the mackerel purse seine fishery, and a brownpelican food study are discussed concerning evidenceof an increase in population size. The spawningbiomass of the northern stock of sardines appears tobe remaining well below 20,000 tons. (9pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific sardines ; Sardinops sagax caeruleus
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    Status of the spawning biomass of the Pacific sardine, 1982-83 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/286 | 8 | 2010-12-14 15:34:03 | 286 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: State law provides for the initiation of a fishery forPacific sardines, Sardinops sagax caeruleus, when thespawning biomass of sardines reaches 20,000 short tons.Data from ichthyoplankton surveys, sea survey cruises,the mackerel fishery sampling program, and the live baitmonitoring program are discussed with regard to an increasein population size. It appears that the spawningbiomass of the northern stock of Pacific sardines remainsbelow 20,000 tons. (7pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific sardines ; Sardinops sagax caeruleus
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  • 133
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    Status of the spawning biomass of the Pacific sardine, 1983-84 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/321 | 8 | 2011-09-29 22:14:42 | 321 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: State law provides for the initiation of a fishery for Pacific sardines, Sardinops sagax caeruleus, when the spawning biomass of sardines reaches 20,000 short tons. Data from ichthyoplankton surveys, sea survey cruises, the mackerel fishery sampling program, and the live-bait fishery monitoring program are discussed with regard to an increase in population size. It appears that the spawning biomass of the northern stock of Pacific sardines remains below 20,000 tons. Legislation passed in 1983 which affects the incidental take and commercial use of sardines is also discussed. (9pp.)
    Keywords: Management ; Fisheries ; Pacific sardine ; Sardinops sagax caeruleus
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    Status of the spawning biomass of the Pacific sardine, 1984-85 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/325 | 8 | 2011-09-29 22:15:06 | 325 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: State law provides for the initiation of a 1000-ton fishery for Pacific sardines, Sardinops sagax, when the spawning biomass of sardines reaches 20 000 short tons.Data from ichthyoplankton surveys, an aerial spotter index, sea survey cruises, the mackerel fishery, and the live bait fishery are discussed as indicators of the relative abundance of sardines compared to previous years. It appears the spawning biomass of the northern subpopulation of Pacific sardine remains below 20 000 tons. A proposedsurvey plan is described for determining the relative magnitude of the sardine spawning biomass on an annual basis. Legislation is discussed which was passed in 1984 and pertains to the sardine resource. (23pp.)
    Keywords: Management ; Fisheries ; Pacific sardines ; Sardinops sagax
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    Mendocino Power Plant site ecological study annual report; July 1, 1971 to December 31, 1972 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/290 | 8 | 2011-09-29 22:17:20 | 290 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: This report is the first annual report submitted in partialfulfillment of Research Contract No. S-1902 between the Department of Fish and Game and the Pacific Gas and Electric Company. Through this contract the Department of Fish and Game is to conduct a preoperational ecological study to establish a base line inventory of the marine biota with special reference to fish and to abalone,including food chains.This first annual report covers all work from September 1971 through December 1972.This annual report covers the first 18 month period of the project from July 1, 1971 through December 31, 1972. The report includes results (discussion and tables) of our subtidal, intertidal, sportfishery, fish collection, fish food habit, and plankton studies. The quarterly reportfor October 1 to December 31, 1972 is included herein and these data are incorporated in this annual report. (86pp.)
    Keywords: Ecology ; Fisheries ; Biology ; Mendocino Power Plant ; California ; environmental impact
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    Cruise Report 71-KB-10: Big game fish investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/567 | 8 | 2011-09-29 21:53:45 | 567 | California Department of Fish and Game
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    Publication Date: 2021-06-30
    Description: (1p.)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; Pacific bonito ; Sarda chiliensis ; Pacific mackerel ; Scomber japonicus ; California
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    Cruise Report 71-KB-16: Big game fish investigation (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/572 | 8 | 2011-09-29 21:53:58 | 572 | California Department of Fish and Game
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    Publication Date: 2021-06-30
    Description: (1p.)
    Keywords: Biology ; R/V Kelp Bass ; California ; cruise report ; Pacific bonito ; Sarda chiliensis ; Pacific mackerel ; Scomber japonicus ; Jack mackerel ; Trachurus symmetricus
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    Cruise Report 71-KB-5: Pelagic Fish Program (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/562 | 8 | 2011-09-29 21:53:22 | 562 | California Department of Fish and Game
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    Publication Date: 2021-06-30
    Description: (1p.)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; San Pedro Bay ; sardine ; Engraulis spp. ; spawning
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    Cruise Report 72-KB-7: Big game fish investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/584 | 8 | 2011-09-29 21:50:24 | 584 | California Department of Fish and Game
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    Publication Date: 2021-06-30
    Description: (1p.)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; Redondo Beach ; California ; Pacific bonito ; Sarda chiliensis
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  • 140
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    Cruise report 73-KB-1: Big game fish investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/609 | 8 | 2011-09-29 21:48:57 | 609 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Document has 1 page.
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; Southern California ; Pacific bonito ; Sarda chiliensis ; white seabass ; Cynoscion nobilis ; California barracuda ; Sphyraena argentea ; Jack mackerel ; Trachurus symmetricus ; Pacific mackerel ; Scomber japonicus
    Repository Name: AquaDocs
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  • 141
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    Cruise Report 71-KB-19: Jack mackerel tagging program (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/575 | 8 | 2011-09-29 21:54:26 | 575 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-30
    Description: (1p.)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; Southern California ; jack mackerel ; Trachurus symmetricus ; Pacific mackerel ; Scomber japonicus ; cruise report
    Repository Name: AquaDocs
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  • 142
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    Cruise Report 72-KB-31: Big game fish investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/607 | 8 | 2011-09-29 21:48:50 | 607 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Document has 3 pages.
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; California ; Pacific bonito ; Sarda chiliensis ; California barracuda ; Sphyraena argentea ; white seabass ; Cynoscion nobilis ; Jack mackerel ; Trachurus symmetricus
    Repository Name: AquaDocs
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  • 143
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    Cruise Report 73-KB-33: Abalone-Lobster Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/636 | 8 | 2011-09-29 21:46:10 | 636 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: 2pp.
    Description: 2 pp.
    Keywords: Fisheries ; Biology ; Green abalone ; Haliotis fulgens ; Spiny lobster ; Panuliris interruptus ; Santa Catalina Island ; California
    Repository Name: AquaDocs
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  • 144
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    Cruise Report 73-KB-27: Big game fish investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/631 | 8 | 2011-09-29 21:46:15 | 631 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Document has 1 page
    Description: 1 p.
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; Pacific bonito ; Sarda chiliensis ; California barracuda ; Sphyraena argentea ; Pacific mackerel ; Scomber japonicus ; Jack mackerel ; Trachurus symmetricus
    Repository Name: AquaDocs
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  • 145
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    Cruise Report 74-KB-5: Abalone and Lobster Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/657 | 8 | 2011-09-29 21:43:49 | 657 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Document has 8pp.
    Keywords: Ecology ; Management ; Fisheries ; Biology ; Anacapa Island ; Santa Cruz Island ; California ; Pink abalone ; Haliotis corrugata ; White abalone ; Haliotis sorenseni ; Spiny lobster ; Panulirus interruptus
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  • 146
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    The status of the northern Anchovy resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/661 | 8 | 2011-09-29 21:43:43 | 661 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The northern anchovy, Engraulis mordax, has been thesubject of increasing exploitation during the last 60 years.Concentrated studies of its biology and population dynamicshas yielded population estimates of 5 to 8 million metrictons or about 5 to 10 times that existing during 1950-51.Continuing cooperative study programs between the State ofCalifornia, the Federal Government and the government ofMexico are recommended. (15pp.)
    Keywords: Management ; Fisheries ; Biology ; Northern anchovy ; Engraulis mordax
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  • 147
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    Status of the Jack Mackerel resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/667 | 8 | 2011-09-29 21:43:27 | 667 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The jack mackerel, Trachurus symmetricus, resource off thewest coast of North America is known to be large and widelydistributed. The spawning biomass is estimated to be 2.1 to 4.8 million tons based upon abundance of jack mackerel eggs collected at sea. The distribution extends from the Gulf of Alaska to the Gulf of Tehuantepec, off the coast of southern Mexico, and as far as 1,500 miles seaward. Within this range lies an area of maximum density which extends from Point Conception to central Baja California.Jack mackerel biological data has not been processed veryrapidly due to higher priorities for analysis of sardine andPacific mackerel data, and the apparent healthy condition ofthis resource. The California Department of Fish and Gameinitiated several projects in 1972 to resolve unanswered biological questions. (14pp.)
    Keywords: Management ; Fisheries ; Biology ; Jack mackerel ; Trachurus symmetricus
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  • 148
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    The status of the Pacific mackerel resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/668 | 8 | 2011-09-29 21:43:29 | 668 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Recent developments in management, biological knowledge,and history of the Pacific mackerel, Scomber japonicus, resource and its fishery in California and Mexico are reviewed. Currently the resource is extremely depleted, and commercial fishing has been curtailed. The 1970 year class was successful, and eventual rehabilitation of the fishery is anticipated. (15pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific mackerel ; Scomber japonicus
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  • 149
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    Mariculture in California (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/673 | 8 | 2011-09-29 21:42:47 | 673 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Mariculture in California is currently under developmentby several private concerns, universities, and by theCalifornia Department of Fish and Game. At present, mostof these efforts classify as research and development witha few in the pilot production phase.The Department of Fish and Game is presently conductingresearch in the culture of mortality resistant strains ofPacific oyster, Crassostrea virginica, the red abalone,Haliotis rufescens, and the spot prawn, Pandalus platyceros. (18pp.)
    Keywords: Management ; Fisheries ; Aquaculture ; Biology ; Mariculture ; California ; Pacific oyster ; Crassostrea virginica ; red abalone ; Haliotis rufescens ; spot prawn ; Pandalus platyceros
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  • 150
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    The status of the California yellowtail resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/671 | 8 | 2011-09-29 21:42:53 | 671 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The California yellowtail, Seriola dorsalis, is a highlyfavored sport fish and a minor commercial species. Since1954 commercial landings have been limited by demand, and thesport catch has been about three times the number of fishcaught by commercial fishermen.Recreational fishing for yellowtail in southernCalifornia waters is almost entirely dependent on annualmigrants from central and northern Baja California. The resource is presently healthy but reduced catches off California could be the result of an expanded catch off Mexico. (19pp.)
    Keywords: Management ; Fisheries ; Biology ; California yellowtail ; Seriola dorsalis ; California
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  • 151
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    Average lunar monthly catch of sardines in California for the 1954-55 through 1961-62 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/679 | 8 | 2011-09-29 21:41:50 | 679 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The catch per unit of effort of the sardine along thecoast of California has been published for the period 1932 to 1953. This paper continues the catch per unit of effort study through the 1961-62 season. Although the catch per unit of effort varied greatly during this later period, it never reached the high levels reported during the 1940's or decreased below the values reported for the disastrous seasons of 1952-53 and 1953-54. Mortalities and year class strengths are briefly discussed. (45pp.)
    Keywords: Fisheries ; Biology ; sardine ; California
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  • 152
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    California's Pacific bonito resource, its status and management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/704 | 8 | 2011-09-29 21:40:10 | 704 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Pacific bonito, Sarda chiliensis, have become increasinglyimportant to California's sport and commercial fishermen sincethe early 1960's, but are now showing signs of decline. Recentinvestigations have revealed much about the bonito's lifehistory and population dynamics.These recent discoveries have been brought together into a document which will serve as a guide to future managementactions. Document has 44 pages.
    Keywords: Management ; Fisheries ; Biology ; California ; Pacific bonito ; Sarda chiliensis
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  • 153
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    The Southern California Jack Mackerel fishery and age composition of the catch for the 1947-48 through 1956-57 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/676 | 8 | 2011-09-29 21:42:22 | 676 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The southern California commercial catch of jack mackerel experienced a tremendous expansion during the 1947-48 season. Landings ranged from a high of 158.7 million pounds landed during 1952-53 t o a low of 14.0 million pounds landed during 1954-55.The 1947 year class contributed 296,718 thousand fish and 167,997 thousand pounds. (49pp.)
    Keywords: Management ; Fisheries ; Biology ; Southern California ; Jack Mackerel ; Trachurus symmetricus
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  • 154
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    The Southern California jack mackerel fishery and age composition of the catch for the 1957-58 through 1961-62 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/677 | 8 | 2011-09-29 21:42:28 | 677 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Approximately 29.7,25.9, 50.9, 64.6, and 102.9 millionpounds were landed for the 1957-58 through 1961-62 seasons.The 1957, 1958, 1959, and 1960 year classes each contributedover 100 million fish to the fishery over the fiveseasons. The 1958 year class also contributed 112 millionpounds landed. (27pp.)
    Keywords: Management ; Fisheries ; Biology ; Southern California ; jack mackerel ; Trachurus symmetricus
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  • 155
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    The Southern California jack mackerel fishery and age composition of the catch for the 1962-63 through 1966-67 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/681 | 8 | 2011-09-29 21:40:58 | 681 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Commercial landings for the 1962-63 through 1966-67 seasons ranged from a high of 92.9 million pounds landed in 1962-63 to a low of 41.2 million pounds landed during 1966-67.The 1958 year class contributed 401,054,000 fish and127,207,000 pounds through the 9 seasons it was present inthe fishery. This was the largest number of fish contributedto the fishery by any year class since jack mackerel canningstarted in 1947. (30pp.)
    Keywords: Management ; Fisheries ; Biology ; southern California ; jack mackerel ; Trachurus symmetricus
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  • 156
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    An assessment of the accidental take of sea otters, Enhydra lutris, in gill and trammel nets (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/721 | 8 | 2011-09-29 21:39:12 | 721 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: The sea otter, Enhydra 1utris, is fully protected inCalifornia by both state and federal law. Despite thisprotection the population has not grown appreciably since atleast 1976. Research efforts directed at identifying thereasons for the lack of population growth have concentratedon sources of mortality and their contribution to totalmortality.The accidental drowning of sea otters in gill and trammelnets used to take California halibut, Para1ichthysca1ifornicus, was identified as a source of mortality whichhas probably increased as the sea otter population expandedinto areas of intense fishing. As a result, an existinggill and trammel net fishery observation program in MontereyBay was expanded to assess the extent and significance ofthe accidental drownings of sea otters in the areas nearMorro Bay and Port San Luis.Three different estimates of the number of sea ottersdrowned annually in gill and trammel nets were generatedusing comparable data bases. The average of these estimateswas approximately 80 sea otters per year for the level offishing effort expended during the June 1982 through June1984 study period.Back calculations of the annual take of sea otters by thegill and trammel net fishery for California halibut weremade for each year from 1973 through 1983. Thesecalculations suggest that the level of accidental take ofsea otters during the last decade may have been high enoughto be a significant factor in the lack of sea otterpopulation growth. (31pp.)
    Keywords: Fisheries ; Biology ; Sea otter ; Enhydra lutris ; California ; gill net ; trammel net
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  • 157
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    A review of the San Diego Bay striped mullet, Mugil Cephalus, fishery (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/723 | 8 | 2011-09-29 21:38:15 | 723 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: San Diego Bay was reopened to commercial gill net fishingfor striped mullet, Mugil cephalus, in that portion of thebay south of the San Diego - Coronado bridge in 1977 via anexperimental gear permit issued by the Fish and GameCommission. In 1985, legislation was passed allowing up tofive permits each annual season to fish for striped mulletin south San Diego Bay. Annual landings ranged from 18,700to 46,800 pounds from 1980 through 1986. (17pp.)
    Keywords: Management ; Fisheries ; San Diego Bay ; California ; Striped mullet ; Mugil cephalus
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  • 158
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    The speckled scallop, Argopecten circularis, in Aqua Hedionda Lagoon, San Diego County, California (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/724 | 8 | 2011-09-29 21:38:24 | 724 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Speckled scallops, Argopecten circularis (Sowerby, 1835), were sampled at Agua Hedionda Lagoon, Carlsbad, San Diego County from March 1984 to October 1986, to obtain basic life history data. Monthly samples of scallops were collected, measured, and released to obtain length frequency data for estimates of growth, life span, and spawning period. Subsamples of scallops were collected for determination of gonadal-somatic and adductor muscle-somatic indices.In 1984 large concentrations of speckled scallops were found on the sand-silt bottom of the lagoon, closely associated with eelgrass, Zostra marina. During the course of the study the numbers of scallops declined, until their virtual disappearance at the end of 1986. Monthly length frequency plots from 24,375 scallop measurements indicate that this is a rapidly growing species with a short life span. Gonadal- and adductor muscle-somatic indices from subsamples of 1,714 scallops indicate first spawning at age one and a relationship between temperature and spawning.Based on this study management recommendations are made for the speckled scallop. (39pp.)
    Keywords: Management ; Fisheries ; Biology ; speckled scallop ; Argopecten circularis ; Aqua Hedionda Lagoon ; San Diego ; California
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  • 159
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    The Northern Anchovy reduction fishery for the 1978-79 through 1981-82 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/717 | 8 | 2011-09-29 21:41:21 | 717 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Nearly 49,000 metric tons (MT) of anchovies were taken during the 1978-79 season, followed by 32,390 MT in 1979-80, 60,678 MT in 1980-81 and 45,150 MT in 1981-82. A total of 14,076 fish was sampled during the four seasons for age, length and sex. The fishery during the four seasons consisted mainly of young-of-the-year and age groups I and II fish. The 1978 and 1979 yr classes comprised the major share of the catch. Seasonal mean lengths varied from 112 mm standard length (SL) in the 1979-80 season to 122 mm SL for the 1981-82 season. Female to male sex ratios ranged from 1.17:l (1978-79 season) to 1.59:l (1979-80 season). (28pp.)
    Keywords: Management ; Fisheries ; Biology ; Northern anchovy ; Engraulis mordax ; California
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  • 160
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    Red abalone size data from Johnsons Lee, Santa Rosa Island, collected from 1978 to 1984 (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/720 | 8 | 2011-09-29 21:39:31 | 720 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Red abalone, Haliotis rufescens, were collected at Johnsons Lee, Santa Rosa Island, in the summers of 1978 through 1982, and in 1984, to obtain data for determining various fishery population parameters. Annual visits to the study site were made at yearly intervals to simplify growth calculations.During the first four visits, 2145 red abalones were tagged,measured, and replaced. Shell damage, soft tissue injuries, and causes of mortality were noted. The method of tagging isdescribed.Recovery of first tagged abalone after one year was approximately 30%. Analysis of variance of the annual samples indicated that the samples were, with one exception, not different. Summaries are presented of the number of abalone collected and tagged by year, frequencies of shell damage, soft tissue injury, predatory sponge infestation, and total mortality. Appendices include a listing of the raw size data and various codes for each tagged abalone. (56pp.)
    Keywords: Management ; Fisheries ; Biology ; Red abalone ; Haliotis rufescens ; Santa Roas Island ; California
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  • 161
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    The mortality rate of Engraulis mordax in Southern California (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/772 | 8 | 2011-09-29 21:37:05 | 772 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: The annual mortality rate for the northern anchovy, Engraulismordax, is estimated to be 66.5% in southern California waters, although the mortality rate increases sharply for older fish. A method for evaluating recruitment regularity and age constancy of mortality is presented. (Document has 25 pages)
    Keywords: Fisheries ; Biology ; Engraulis mordax ; northern anchovy ; Southern California ; mortality
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  • 162
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    The status of the white seabass resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/756 | 8 | 2011-09-29 21:36:21 | 756 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: White seabass, Cynoscion nobilis, have been fished inCalifornia since late in the ninteenth century. At presentthe commercial fishery is stable, landing about 8 hundredthousand pounds per year, but the sport fishing has declinedto the poorest catch on record. (Document has 11 pages.)
    Keywords: Management ; Fisheries ; Biology ; White seabass ; Cynoscion nobilis ; California
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  • 163
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    The Southern California jack mackerel fishery and age, length and sex composition of the catch for the 1967-68 through 1971-72 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/757 | 8 | 2021-02-27 19:33:34 | 757 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Commercial landings for 5 seasons, 1967-68 through1971-72, approximated 36.5, 58.7, 36.8, 57.0 and 56.2million pounds respectively (16,600; 26,600; 16,700;25,900 and 25,500 Mg).The 1967 year class dominated the fishery during the 1967-68 and 1968-69 seasons. The 1970 year class, in the fishery only 2 years, contributed an estimated 250 million fish and 45 million pounds (20,400 Mg). (46pp.)
    Keywords: Fisheries ; Biology ; Southern California ; jack mackerel ; Trachurus symmetricus ; life history
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  • 164
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    Cruise Report 74-KB-15: Lobster investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/827 | 8 | 2011-09-29 21:30:48 | 827 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-03
    Description: (1 page)
    Keywords: Fisheries ; Biology ; Santa Catalina Island ; California ; Spiny lobster ; Panulirus interruptus ; life history ; R/V Kelp Bass
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  • 165
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    Cruise Report 74-KB-18 and 74-M-4: Abalone-Lobster Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/830 | 8 | 2011-09-29 21:31:13 | 830 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-03
    Description: (4pp.)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; R/V Mollusk ; San Clemente Island ; California ; Pink abalone ; Haliotis corrugata
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  • 166
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    Cruise Report 74-KB-22: Abalone Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/834 | 8 | 2011-09-29 21:31:31 | 834 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-03
    Description: (1 page)
    Keywords: Fisheries ; Biology ; Russian River ; Shelter Cove ; California ; R/V Kelp Bass ; red abalone ; Haliotis rufescens
    Repository Name: AquaDocs
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    Cruise Report 74-KB-25: Lobster Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/837 | 8 | 2011-09-29 21:31:49 | 837 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-03
    Description: (1 page)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; Santa Catalina Island ; California ; Spiny lobster ; Panulirus interruptus ; life history
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  • 168
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    Cruise Report 74-KB-30 and 74-M-6: Abalone - Lobster Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/842 | 8 | 2011-09-29 21:32:12 | 842 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-03
    Description: (3pp.)
    Keywords: Management ; Fisheries ; Biology ; R/V Kelp Bass ; R/V Mollusk ; San Clemente Island ; Santa Catalina Island ; California ; green abalone ; Haliotis fulgens ; tag and recapture
    Repository Name: AquaDocs
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  • 169
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    Cruise Report 74-KB-31: Sportfish-Kelp Habitat Project (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/843 | 8 | 2011-09-29 21:32:17 | 843 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-03
    Description: (2pp.)
    Keywords: Management ; Fisheries ; Biology ; R/V Kelp Bass ; Catalina Island ; Palos Verdes Peninsula ; California ; Giant kelp ; Macrocystis sp.
    Repository Name: AquaDocs
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  • 170
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    Cruise Report 74-KB-11 and 74-M-2: Abalone-Lobster Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/823 | 8 | 2011-09-29 21:32:34 | 823 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-03
    Description: (4pp.)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; R/V Mollusk ; San Miguel Island ; California ; Spiny lobster ; Panulirus interruptus ; red sea urchin ; Strongylocentrotus franciscanus ; purple sea urchin ; Strongylocentrotus purpuratus
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  • 171
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    Biological surveys of five southern artificial reefs: Oceanside #1, Oceanside #2, Carlsbad, Pacific Beach, and Mission Bay (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/1424 | 8 | 2011-09-29 20:36:16 | 1424 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-08
    Description: (Document pdf contains 19 pages)
    Keywords: Fisheries ; Biology ; artificial reefs
    Repository Name: AquaDocs
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  • 172
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    Cruise Report 70-S-8: Crab (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2038 | 8 | 2011-09-29 19:45:56 | 2038 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: (PDF contains 3 pages.)
    Keywords: Fisheries ; Biology ; Table Bluff ; Oregon border ; market crab ; Cancer magister ; tanner crabs ; Chionoecetes tanneri ; tag
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  • 173
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    Cruise Report 70-S-6: Sportfish Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2034 | 8 | 2011-09-29 19:47:14 | 2034 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: (PDF contains 2 pages.)
    Keywords: Fisheries ; Biology ; Baja California ; Mexico ; tag and release ; sand bass ; Paralabrax nebulifer ; Pacific bonito ; Sarda chiliensis ; California yellowtail ; Seriola dorsalis ; N.B.Scofield
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  • 174
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    Cruise Report 72-S-1: Big Game Fisheries Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2037 | 8 | 2011-09-29 19:45:54 | 2037 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: (PDF contains 5 pages.)
    Keywords: Fisheries ; Biology ; Baja California ; Mexico ; Los Coronados Islands ; Gorda Point ; tag and release ; Pacific bonito ; Sarda chiliensis ; Pacific mackerel ; Scomber japonicus ; jack mackerel ; Trachurus symmetricus
    Repository Name: AquaDocs
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  • 175
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    Cruise Report 71-S-3 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2042 | 8 | 2011-09-29 19:43:06 | 2042 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: (PDF contains 7 pages.)
    Keywords: Fisheries ; Biology ; southern Channel Islands ; Tanner Bank ; Cortez Bank ; southern California ; sablefish ; Anoplopoma fimbria ; Santa Rosa-Cortez Ridge ; N.B.Scofield
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  • 176
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    Cruise Report 71-S-6: Sportfish Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2044 | 8 | 2011-09-29 19:43:09 | 2044 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: (PDF contains 1 pages.)
    Keywords: Fisheries ; Biology ; Baja California ; sand bass ; Paralabrax nebulifer ; recapture ; tag ; N.B.Scofield
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  • 177
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    Cruise Report 71-S-2: Prawns (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2040 | 8 | 2011-09-29 19:46:24 | 2040 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: (PDF contains 4 pages.)
    Keywords: Fisheries ; Biology ; Usal ; Oregon border ; spot prawns ; Pandalus platyceros ; coonstripe shrimp ; Pandalus danae ; ocean shrimp ; Pandalus jordani ; N.B.Scofield
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  • 178
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    Cruise Report 71-S-8: Crab (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2046 | 8 | 2011-09-29 19:43:13 | 2046 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: (PDF contains 3 pages.)
    Keywords: Fisheries ; Biology ; False Cape ; Oregon border ; market crab ; Cancer magister ; ocean shrimp ; Pandalus jordani ; tag ; N.B. Scofield
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  • 179
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    Cruise Report 72-S-5: Inshore fisheries habitat evaluation and monitoring (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2180 | 8 | 2011-09-29 19:37:53 | 2180 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-12
    Description: (PDF contains 3 pages.)
    Keywords: Fisheries ; Biology ; Huntington Beach ; California ; trawling ; ridgeback prawns ; Eusicyonia ingentis ; urchins ; Allocentratus fragilis ; sea cucumbers ; Parastichopus sp. ; sea stars ; Astropectin verrilli
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  • 180
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    Cruise Report 72-S-4: Big Game Fish Investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2179 | 8 | 2011-09-29 19:37:52 | 2179 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-12
    Description: (PDF contains 2 pages.)
    Keywords: Fisheries ; Biology ; Baja California ; Magdalena Bay ; Guadalupe Island ; tag and release ; Pacific bonito ; Sarda chiliensis ; California yellowtail ; Seriola dorsalis ; California barracuda ; Sphyraena argentea ; white seabass ; Cynoscion nobilis ; Pacific mackerel ; Scomber japonicus ; Jack mackerel ; Trachurus symmetricus ; trolling
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  • 181
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    Cruise Report 72-S-6: Shellfish investigations (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2181 | 8 | 2011-09-29 19:37:55 | 2181 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-12
    Description: (PDF contains 3 pages.)
    Keywords: Fisheries ; Biology ; Trinidad ; California ; Cape Sebatian ; Oregon ; ocean shrimp ; Pandalus jordani ; Pacific hake ; Merluccius productus ; trawls
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  • 182
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    Cruise Report 72-S-8: Crab (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2184 | 8 | 2011-09-29 19:38:16 | 2184 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-12
    Description: (PDF contains 4 pages.)
    Keywords: Fisheries ; Biology ; Eureka ; California ; Oregon border ; market crab ; Cancer magister ; trawling ; trapping ; ocean shrimp ; Pandalus jordani ; Dover sole
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  • 183
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    Cruise Report 72-S-9: Bottomfish (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2183 | 8 | 2011-09-29 19:38:14 | 2183 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-12
    Description: (PDF contains 5 pages.)
    Keywords: Fisheries ; Biology ; Santa Cruz ; California ; Point Sur ; California ; demersal fishes ; life history ; rockfish
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  • 184
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    Cruise Report 72-S-7: Crab (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2182 | 8 | 2011-09-29 19:37:57 | 2182 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-12
    Description: (PDF contains 5 pages.)
    Keywords: Fisheries ; Biology ; Point San Pedro ; California ; Bodega Head ; California ; market crab ; Cancer magister ; trawling
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  • 185
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    Pendleton Artificial Reef: annual progress report presented to Southern California Edison Company (2021)
    State of California, Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2197 | 8 | 2011-09-29 19:29:20 | 2197 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-12
    Description: (PDF contains 82 pages.)
    Description: Nearshore Sportfish Habitat Enhancement Program
    Keywords: Management ; Ecology ; Fisheries ; Biology ; artificial reef ; marine algae ; marine invertebrates ; fish ; Southern California ; Nearshore Sportfish Habitat Enhance~cnt Program
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  • 186
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    Southern California marine sport fishing: private-boat catch and effort during 1981 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/314 | 8 | 2011-09-29 22:14:03 | 314 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: An extensive study of fishing activity stemming from privately-owned boats was conducted during 1981 in order to determine the magnitude and impact of this segment of southern California's marine sport fishery. Anglers and divers returning from fishing trips were interviewed at launch ramps, boat hoists, and boat-rental facilities from Pt. Conception to the Mexican border. Information on fishing catch and effort was used to calculate statistical estimatesof total catch, total effort, catch of preferred sportfish species, and compliance rates for legal minimumsize limits.An estimated 1,013,000 organisms were landed during355,000 fishing trips. The major components of thisyear's catch were 1) Pacific mackerel, Scomber japonicus, 231,000 landed; 2) Pacific bonito, Sarda chiliensis, 157,000 landed; 3) white croaker, Genyonemus lineatus, 148,000 landed; and 4) rockfish, Sebastes spp., 142,000 landed. These fishes contributed two-thirds of the total catch.This year anglers were favored by mild weather andthe summertime appearance of migratory game fishes,resulting in higher than usual effort levels andabove average catch rates for favored game species. (81pp.)
    Keywords: Management ; Fisheries ; Pacific mackerel ; Scomber japonicus ; Pacific bonito ; Sarda chiliensis ; white croaker ; Genyonemus lineatus ; rockfish ; Sebastes spp.
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  • 187
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    Artificial reef plan for sport fish enhancement (2021)
    California Department of Fish and Game, Marine Resources Division | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/357 | 8 | 2011-09-29 22:09:59 | 357 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: Hard bottom substrate provides habitat for a multitude of marine fishes, invertebrates, and plants - particularly giant kelp - which are of direct and indirect importance to sport and commercial fisheries. These reefs also enhanceesthetic uses of the marine environment. This document sets forth the plan of the California Department of Fish and Game (CDFG) for the construction of artificial reefs.The plan includes an outline for defining the purpose of reef construction, gathering information pertinent to reef placement and design, selecting a reef site, preparing a project narrative, obtaining permits and approvals for reef construction, developing a general permit for reef construction, and establishing a system of fisheries habitat enhancement areas. Procedures for constructing and mappingreefs are discussed and an outline for conducting short- and long-term biological studies of reef communities is presented.Since 1958, CDFG has constructed 31 reefs off southern California. Thirteen of the largest and most frequently used reefs were mapped using hydroacoustic and radio-locating techniques. Maps of these reefs were published in a 1989 CDFG booklet entitled "A Guide to the Artificial Reefs of Southern California".Since 1978, seven developmental reefs have been constructed: 1) Pendleton Artificial Reef (1980) - San Diego County; 2) Pitas Point Artificial Reef (1984) Ventura County; 3) Marina Del Rey Artificial Reef (1985) - Los Angeles County; 4)Oceanside Artificial Reef (1987) - San Diego County; 5) Pacific Beach Artificial Reef (1987) - San Diego County; 6) Santa Monica Artificial Reef (1987) - LosAngeles County; and 7) Topanga Artificial Reef (1987) - Los Angeles County. These reefs were built to improve habitat for sport fishes and associated fauna and to evaluate the enhancement characteristics of reefs related to geographiclocation, depth, height, rock size, and reef spacing.Short-term studies revealed that all reefs have provided shelter, food, nesting, and nursery areas for important fish species and have increased sport fishing opportunities. Furthermore, giant kelp has been observed on all reefs built at suitable depths. More extensive long-term studies are planned in 1998 when reef communities will be at successional equilibrium. These studies will provideadditional information concerning the long-term potential of artificial reefs as habitat for sport fish, invertebrates, and plants.The plan discusses different types of man-made reefs, including developmental, production, and fishing access reefs, and provides examples of each. It documentsCDFG policy regarding the use of reefs as mitigation for impacts on rocky habitat and kelp. It also documents the laws authorizing CDFG to administer reef construction and studies in California. The activities involved in designing,permitting, constructing, and evaluating Pendleton Artificial Reef are provided as an example of the reef building and study process.A list of reefs is provided to document the location, depth, area, materials, and funding sources for all reefs constructed and/or augmented in California. (85pp.)
    Keywords: Fisheries ; Biology ; kelp
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  • 188
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    Southern California marine sport fishing: Private boat anglers' catch and effort in Los Angeles County, October-December, 1980 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/15 | 8 | 2011-09-29 22:41:18 | 15 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: The catch landed and effort expended by private-boatsport fishermen was studied in Los Angeles Countybetween October and December 1980, in order todetermine the impact of one segment of the sportfishery on local marine resources. Fishermenreturning from fishing trips were interviewed atlaunch ramps, hoists, and boat rental facilities.This report contains quantitative data and statisticalestimates of total effort, total catch, catch ofpreferred species, and length frequencies for thosespecies whose catches are regulated by minimum sizelimits.An estimated 94,000 organisms were landed by 22,000anglers and 1,200 divers. The major components of thecatch were Pacific mackerel, Scomber japonicus, 29,000landed; white croaker, Genyonemus lineatus, 17,500landed; and Pacific bonito, Sarda chiliensis, 11,500landed. These three species comprised two-thirds ofthe total catch.Anglers' compliance with size limit regulations wasvariable. Nearly 80% of all measured bass, Paralabraxspp., were legal size, but only 50% of the Californiahalibut, Paralichthys californicus, were legal size.Divers showed much better compliance with the sizelimit regulations: 96% of all California spinylobsters, Panulirus interruptus, were legal size. (14pp.)
    Keywords: Management ; Fisheries ; marine species ; recreational fishing ; fish size ; anglers ; divers
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  • 189
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    Status of the spawning biomass of the Pacific sardine, 1980-81 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/14 | 8 | 2011-09-29 22:41:09 | 14 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: State law requires that the population of Pacific sardines,Sardinops sagax caeruleus, must reach a minimum spawningbiomass of 20,000 short tons before initiation of a fishery.Data from ichthyoplankton surveys, the anchovy live baitfishery, sea survey cruises, and the mackerel purse seinefishery are analyzed for evidence of an increase inpopulation size. Presently, the spawning biomass of thenorthern stock of sardines remains far below 20,000 tons. (9pp.)
    Keywords: Fisheries ; Biology ; Pacific sardines ; Sardinops sagax caeruleus ; fisheries
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  • 190
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    Fish and bivalves at Bolsa Chica Marsh re-establishment project: Progress report II (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/11 | 8 | 2011-09-29 22:40:57 | 11 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: The objectives of our fish and bivalve study are:1. Determine changes in the number of species of fishand bivalves before Phase I and during Phase I atBolsa Chica Marsh.2. Determine if California Department of Fish and Game'spredicted benefits in Phase I were achieved by increasesin fish species.3. Determine influences of water management practicesupon fish and bivalve composition.Nine species of fish and three species of bivalves werecollected above the tide gates. Goldfish, Carassius auratus;shiner surfperch, Cymatogaster aggregata; queenfish, Seriphus politus; and California jackknife clam, Tagelus californianus have not been reported previously from above the tide gates. Five species of fish and four species of bivalves were collected below the tide gates. Striped bass, Roccus saxatilis; and cheekspot goby, Ilypnus gilberti have not been reported previously from below the tide gates. (8pp.)
    Keywords: Ecology ; Fisheries ; Biology ; Bolsa Chica Marsh ; fish ; bivalves ; California
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  • 191
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    Fish and bivalves at Bolsa Chica Marsh re-establishment project; Progress report III (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/13 | 8 | 2011-09-29 22:41:07 | 13 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: The objectives of our fish and bivalve study are:1. Determine changes in the number of species of fishand bivalves before Phase I and during Phase 1 atBolsa Chica Marsh.2. Determine if California Department of Fish and Game'spredicted benefits in Phase I were achieved by increasesin fish species.3. Determine influences of water management practicesupon fish and bivalve composition.Thirteen species of fish and five species of bivalveswere collected from Inner Bolsa Bay and South Bolsa Slough.Deepbody anchovy, Anchoa compressa; jacksmelt, Atherinopsiscaliforniensis; longjaw mudsucker, Gillichthys mirabilis;specklefin midshipman, Porichthys myriaster; round stingray,Urolophus halleri; banded chione, Chione californiensis;bentnose clam, Macoma nasuta; and common littleneck clam,Protothaca staminea have not been reported previously fromInner Bolsa Bay. Nine species of fish and four species ofbivalves were collected from outer Bolsa Bay. Yellowfin goby, Acanthogobius flavimanus; longjaw mudsucker; tilapia, Tilapia mossambica; and bay pipefish, Syngnathus leptorhynchus have not been reported previously from Outer Bolsa Bay. (11pp.)
    Keywords: Ecology ; Fisheries ; Biology ; Bolsa Chica Marsh ; fish ; bivalves
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  • 192
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    An evaluation of the California barracuda resource and its management (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/17 | 8 | 2011-09-29 22:41:25 | 17 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: Despite efforts to manage it, the California barracuda,Sphyraena argentea, resource has exhibited a marked declinein abundance from levels exhibited prior to 1950. This paperpresents a history of the California barracuda fisheries, asummary of its life history and population dynamics; and anevaluation of the resource under current management practices and recommendations for improvements in current management.Evaluation of the current status of the resource indicatesits abundance off southern California is low but slowlyimproving with a marked improvement in size composition.Management recommendations, when adopted, should help increase the rate of recovery of the California barracuda resource. (73pp.)
    Keywords: Management ; Fisheries ; Biology ; California barracuda ; Sphyraena argentea ; fisheries ; California
    Repository Name: AquaDocs
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  • 193
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    Southern California partyboat angler survey (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/16 | 8 | 2011-09-29 22:41:21 | 16 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: Previous studies suggest that ocean anglers are unableto identify many common marine fishes and that they frequently use nondesignated common names for those fisheswith which they are familiar.This paper discusses the ability of the anglers andcrew aboard commercial passenger fishing vessels (CPFV) toidentify 22 fishes caught off southern California and relates this ability to fishing experience and frequency. Implications to resource management are also discussed.Most CPFV anglers were inexperienced and could identifyonly a few of the species. However, as experience increased,the scores improved. Vessel crew members scored higher thanthe most experienced anglers.The inability of anglers to identify marine fishes andthe widespread use of nondesignated and often confusingcommon names help to explain why some fishery managementregulations of the California Department of Fish and Gameare relatively ineffective. (37pp.)
    Keywords: Fisheries ; Biology ; Fish identification ; anglers ; recreational fishing
    Repository Name: AquaDocs
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  • 194
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    Southern California independent sport fishing survey Quarterly Report for January-March, 1976 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/19 | 8 | 2011-09-29 22:41:33 | 19 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: A 1-yr. study was undertaken to devise a sampling programwhich would determine fishing catch and effort levels ofone segment of the southern California marine sportfishery. Personal interviews of fishermen were conductedat launch ramps, boat hoists, and boat rental locationsfrom Santa Barbara County to the Mexican border. Thisreport presents quantitative data and statisticalestimates of effort, total catch, catch of preferredsport fish species, and length frequencies of selectedspecies landed by private-boat sport fishermen.An estimated 55,000 anglers and 3,300 divers landed 182,000fishes, molluscs, and crustaceans. The major componentsof the catch were 1) rockfishes, Sebastes spp., 73,000landed; 2) white croaker, Genyonemus lineatus, 28,000landed; 3) bass, Paralabrax spp., 15,000 landed; and4) Pacific bonito, Sarda chiliensis, 12,000 landed. (22pp.)
    Keywords: Management ; Fisheries
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  • 195
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    Southern California independent sport fishing survey Quarterly Report for April-June, 1976 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/18 | 8 | 2011-09-29 22:41:28 | 18 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: A 1-yr. study was undertaken to devise a sampling programwhich would determine fishing catch and effort levels ofone segment of the southern California marine sportfishery. Personal interviews of fishermen were conductedat launch ramps, boat hoists, and boat rental locationsfrom Santa Barbara County to the Mexican border. Thisreport presents quantitative data and statistical estimatesof effort, total catch, catch of preferred sport fishspecies, and length frequencies of selected specieslanded by private-boat sport fishermen.An estimated 102,000 anglers and 3,700 divers landed 275,000fishes, molluscs, and crustaceans. The major componentsof the catch were 1) white croaker, Genyonemus lineatus,85,000 landed; 2) bass, Paralabrax spp., 48,000 landed; and3) Pacific bonito, Sarda chiliensis, 42,000 landed. (22pp.)
    Keywords: Management ; Fisheries
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  • 196
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    Southern California private-boat sport fishermen: how familiar are they with the sport fishing regulations? (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/10 | 8 | 2011-09-29 22:40:55 | 10 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: Anglers frequently violate sport fishing regulations out ofignorance, by mistake, or by deliberate action. To determinewhether unfamiliarity with the regulations plays a major part in this problem, we asked anglers on privately-owned,trailerable boats at launch ramps and boat hoists a series of questions which tested their knowledge of the regulations.We found that on any winter weekend about 30% of the anglerson private-boats knew none of the size limits, 50% knew atleast three of the six size limits, and 4% knew all of thesize limits. Only about 25% of the anglers kept a copy ofthe regulations on their boats for reference when fishing.The results of the survey indicate that greater effort mustbe expended to familiarize sport fishermen with the fishingregulations. (9pp.)
    Keywords: Management ; Fisheries ; recreational fishing ; fish size ; anglers ; regulations
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  • 197
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    Southern California independent sport fishing survey Quarterly Report for July-September, 1975 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/20 | 8 | 2011-09-29 22:41:36 | 20 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: A 1-yr. study was undertaken to devise a sampling programwhich would determine fishing catch and effort levels ofone segment of the southern California marine sportfishery. Personal interviews of fishermen were conductedat launch ramps, boat hoists, and boat rental locationsfrom Santa Barbara County to the Mexican border. Thisreport presents quantitative data and statisticalestimates of effort, total catch, catch of preferredsport fish species, and length frequencies of selectedspecies landed by private-boat sport fishermen.An estimated 107,000 anglers and 5,300 divers landed 307,000fishes, molluscs, and crustaceans. The major componentsof the catch were 1) white croaker, Genyonemus lineatus,87,000 landed; 2) bass, Paralabrax spp., 30,000 landed; and3) Pacific mackerel, Scomber japonicus, 21,000 landed. (24pp.)
    Keywords: Management ; Fisheries
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  • 198
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    Status of the spawning biomass of the Pacific sardine, 1978-79 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/22 | 8 | 2011-09-29 22:41:59 | 22 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: State law requires that the population of Pacificsardines, Sardinops sagax caeruleus, must reach aminimum spawning biomass of 20,O0O short tons beforeinitiation of a fishery. Data from ichthyoplanktonsurveys, the anchovy live bait fishery, sea surveycruises, and the jack mackerel purse seine fisheryare analyzed for evidence of an increase inpopulation size. Presently, the spawning biomassof the northern stock of sardines remains far below20,000 tons. (9pp.)
    Keywords: Fisheries ; Biology
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  • 199
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    Southern California independent sport fishing survey Quarterly Report no. 10 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/45 | 8 | 2021-02-27 19:34:29 | 45 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: During the October 1 - December 31, 1977 quarter, 28launch ramps, hoists, and boat rental locations weresampled a total of 294 times. During the sample days11,942 anglers and 1,025 divers were interviewed.They expended 83,882 effort-hours and landed 36,741fishes and other organisms of 163 identified species.The ten most commonly landed species were 1) Pacificmackerel, Scomber japonicus, 16%; 2) white croaker,Genyonemus lineatus, 16%; 3) olive rockfish, Sebastesserranoides, 6%; 4) blue rockfish, S. mystinus, 4%;5) halfmoon, Medialuna californiensis, 4%; 6) Pacificbonito, Sarda chiliensis, 3%; 7) rock scallop,Hinnites multirugosus, 2%; 8) chilipepper, Sebastesgoodei, 2%; 9) greenspotted rockfish, S. chlorostictus,2%; and 10) kelp bass, Paralabrax clathratus, 2%. (25pp.)
    Keywords: Management ; Fisheries ; Biology
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  • 200
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    Southern California commercial passenger fishing vessel sampling study Quarterly Report no. 14; October 1 - December 31, 1978 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/47 | 8 | 2011-09-29 22:38:45 | 47 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: Between October 1 and December 31, 1978, Departmental personnel sampled catches during 132 trips aboard commercial passenger fishing vessels (partyboats) operating in southern California. A total of 25,571 fishes belonging to 87 species were identified and measured.In addition, six long-range trips originating in San Diego and fishing in Mexican waters were sampled. A total of 1,225 fishes comprising 20 species was identified and measured at dockside from these vessels.The 10 most commonly taken species during the quarter accounted for 76.3% of the southern California catch. The most frequently sampled species were bocaccio, Sebastes paucispinis (24.7%); Pacific mackerel, Scomber japonicus (15.8%); chilipepper, Sebastes goodei (8.7%); kelp bass, Paralabrax clathratus (7.4%); Pacific bonito, Sarda chiliensis (5.7%); olive rockfish, Sebastes serranoides (4.1%); blue rockfish, S. mystinus (4.0%); squarespot rockfish, S. hopkinsi (2.1%); greenspotted rockfish, S. chlorostictus (2.l%); and vermilion rockfish, S. miniatus (1.9%). Samples gathered from long-range trips showed thetop five species accounted for 90.4% of the fishes sampled. The most frequently sampled species were yellowtail, Seriola lalandi (28.8%); yellowfin tuna, Thunnus albacares (20.7%); wahoo, Acanthocybiumsolanderi (16.2%); snowy grouper, Epinephelus niveatus (12.4%); and dolphinfish, Coryphaena hippurus (12.3%).December marked the final month in which partyboats were sampled off southern California. (69pp.)
    Keywords: Management ; Fisheries
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