Now showing items 1-20 of 15615

    • Test of the collection I have no rights for

      Test, E.A.; Test, E.A. (2020)
      The test is needed.
    • Test MBLWHOI

      Smith, John (MBLWHOI LibraryWoods Hole, United States, 1999)
    • TEST

      Messaoudi, saida (2021)
    • Life-history traits of long whisker catfish Mystus gulio (Siluriformes: Bagridae) in the ‎coastal water (Maloncho river) of southern Bangladesh.

      Rahman‎, Obaidur; Hossain‎, Md. Yeamin; Islam‎, Md. Akhtarul; Rahman‎, Md. Ataur; Khatun‎, Dalia; Parvin‎, Most. Farida; Sarmin‎, Most. Shakila; Tanjin, Sumaya; Rahman, Md. Ashekur; Mawa, Zannatul; et al. (2020-12-31)
      This analysis illustrates the life history traits of Long whisker, Mystus gulio (Hamilton, ‎‎1822) including sex ratio, length-weight (LWRs) and length-length relationships (LLRs), ‎condition factors (KA, KF, KR), relative weight (WR) and form factor (a3.0), empirical based ‎size at first sexual maturity length (Lm) and natural mortality (MW, year-1). Total of 407 ‎individuals were scarcely collected from January-December 2017 using different fishing ‎gears. The sex ratio (M/F) was calculated as 1:1.26 (p<0.05). The overall sex ratio did not ‎differ significantly from the expected 1:1(p>0.05). The minimum-maximum total length ‎and body weight were observed as 5.20-15.50 cm and 2.11-33.60g for male, 5.20-17.50 ‎cm and 1.25-57.12g for female. All LWRs were very significant with all coefficients of ‎determination (r2)>0.967. The allometric coefficient indicated negative allometric growth ‎in male (b<3.0), positive allometric growth in female and also in combined (b>3.0). All ‎LLRs were significant with r2 values >0.965. The KF indicated the best condition of this ‎species for their well-being. The WR was not significantly diverse from 100 for males (p = ‎‎0.552) and females (p = 0.249), which indicate suitable condition for habitat. The a3.0 ‎were 0.0103 and 0.0108, and the Lm were 9.13 and 10.46 cm in total length for male and ‎female, respectively. Moreover, MW was 1.16 year-1 for male and 1.02 year-1 for female. ‎The results will be operative for the sustainable conservation of M. gulio in Bangladeshi ‎coastal waters and also nearby countries.‎
    • Some observations on the mass mortality of fish at Ormara (east bay), Balochistan in ‎October 2016‎.

      Moazzam, Muhammad (2020-12-31)
      Mass mortality of fish and shellfish species was recorded from Ormara (East Bay) in ‎October 2016. Initially a few dead fishes were observed to be floating in the open sea in ‎the East Bay area. With the passage of time, mass mortality was observed on the south-‎western part of the East Bay and heaps of fish were found floating in the area. This ‎event of mass mortality was only confined to the Oramara (East Bay) and not spread to ‎other parts of Oramara coast. In order to determine the dynamic of the fish mortality ‎and its spread in the area, sampling of the water of the area was collected on regular ‎intervals. It was observed that Noctiluca scintillans (Macartney) Kofoid & Swezy, 1921 ‎was present in extremely large numbers (highest recorded concentration 13 cells/ml) ‎which led to depletion of oxygen in the area resulting in mortality of large number of ‎fishes. In this fish kill demersal (bottom dwelling) as well as pelagic species (surface ‎dwelling) were found dead in the area in large numbers. Groupers (Epinephelus spp.), ‎Chinese pomfrets (Pampus chinensis), mullets, shrimp (Penaeus spp.) and crabs ‎‎(Portunus spp.) were dominated in the dead fishes and shellfishes. Oxygen depletion was ‎observed to confine to south-western part of the Ormara Bay where highest number of ‎dead fishes were observed. The phenomenon of mortality of fishes continued for 8 days ‎whereas normal condition started prevailing in 15 days and no mortality was observed ‎after 20 days since the start of the mortality phenomenon.‎
    • Cross-shelf phytoplankton dynamics in the northeastern Levantine ‎Basin.

      Uysal, Zahit (2020-12-31)
      A time series sampling program at monthly intervals was carried out at three stations ‎across the shelf in the northeastern Levantine basin to collect phytoplankton samples ‎and associated physical (temperature, salinity, secchi disc depth) variables over a year. ‎Quality and quantity of phytoplankton varied significantly across the shelf in time. Total ‎‎71 diatom, 40 dinoflagellate, 4 silicoflagellate and 17 coccolithophore species have been ‎identified from the study area. Diatoms’ contribution to total phytoplankton abundance ‎was maximal during autumn and spring in the nearshore and only during spring in the ‎mid shelf. Coccolithophores formed the dominant group almost throughout the year ‎except May and June in the offshore. Dinoflagellates formed the least abundant group in ‎the shelf over the year. Phytoplankton species have been found the most abundant and ‎diverse during spring when the river runoff to the basin was maximal. In general, a ‎decreasing trend in phytoplankton abundance towards offshore was prominent. ‎Phytoplankton has been found most abundant in the entire shelf during spring and early ‎summer reaching a peak level of 2.7 x 106 cells/l during May in the shallowest station. A ‎huge difference in quantity was observed in phytoplankton contents of the nearshore ‎and offshore waters during summer. Multivariate analyses have shown formation of ‎distinct seasonal phytoplankton assemblages throughout the year. Based on Spearman’s ‎rank correlation analysis, a highly significant negative correlation (n=35, rs= -.587, P < ‎‎0.01) was observed between phytoplankton abundance and surface salinity. ‎Superimposed surface temperatures seemed to better illustrate seasonal clusters relative ‎to surface salinity plots.‎
    • Heavy metal accumulation in sea cucumber ‎Actinopyga mauritiana (Echinodermata-‎‎Holothuroidea) from Cape Monze Beach Karachi, ‎Pakistan‎.

      Ahmed, Quratulan; Benzer, Semra; Ali, Qadeer Mohammad (2020-12-31)
      In the present study sea cucumber Actinopyga mauritiana, water and sediment samples ‎collected during September to December 2018. Six heavy metals (Fe, Cu, Mn, Zn, Pb, ‎and Cd) were analyzed in tissues (muscles, tentacles and guts), water and sediment by ‎atomic absorption spectrophotometer (AAS). The average measured levels of heavy ‎metals Fe, Cu, Mn, Zn, Pb and Cd in A. mauritiana muscle, tentacle and gut was 42.20 ± ‎‎9.47, 3.14 ± 0.48, 0.38 ± 0.22, 11.42 ± 4.34, 0.03 ± 0.00 and 0.02 ± 0.00; 36.90 ± 8.14, ‎‎3.22 ± 0.60, 0.40 ± 0.27, 10.50 ± 1.70, 0.04 ± 0.05 and 0.03 ± 0.02; 21.54 ± 5.06, 2.32 ± ‎‎0.66, 0.53 ± 0.16, 13.13 ± 2.90, 0.02 ± 0.02 and 0.02 ± 0.01 μg g−1 respectively. It is ‎useful to monitor all metal accumulation in the future.‎
    • First record of Leucothoe spinicarpus (Amphipoda: Leucothoidae) parasite within the ‎Aplysia (varria) cornigera from Pakistan.

      Ghory‎, Farhana S.; Ali, Qadeer Mohammad; Mubarak, Shumaila (2020-12-31)
      A parasitic species of Leucothoe spinicarpus (Abildgaard, 1789) occurred on the ‎ctenidium of Aplysia (Varria) cornigera Sowerby, 1869. The current study describes ‎taxonomic details of the parasitic species (Leucothoe spinicarpus). This is the first record ‎from Pakistan.‎
    • Ligula intestinalis (L., 1758) infection of ‎euryhaline fish the sand smelt Atherina ‎boyeri ‎Risso, 1810‎.

      Benzer, Semra (2020-06-30)
      Ligula intestinalis was found during the parasitological investigations of Atherina boyeri ‎specimens collected from Hirfanlı Reservoir, Turkey. It was found that 0.004% of all ‎individuals were infected by L. intestinalis including 2 female (0.0011% of all ‎individuals) and 5 male (0.0028% of all individuals). It was determined that the length ‎weight relationship equivalents of infected individuals with population differed from ‎those of non-infected individuals. The b value of the infected individuals was found to ‎be lower than the b value of the non-infected individuals. It is thought that the results ‎obtained in this study will be beneficial in preserving and improving the ecological ‎potential of the water system.‎
    • Heavy metal levels in elongate sole (Solea ‎elongata Day, 1877) from the Korangi ‎Fish ‎Harbour, Karachi, Pakistan.‎

      Yousuf‎, Farzana; Benzer‎, Semra; Ahmed, Quratulan (2020-06-30)
      In this study, fish samples collected from Elongate Sole (Solea elongata Day, 1877) ‎caught on the Korangi Fish Harbour in 2018 (South-west Monsoon and North-east ‎Monsoon) were analysed to determine concentrations of heavy metals: Fe, Zn, Cu, Pb, ‎Mn and Cd by an atomic absorption spectrophotometer, expressed per unit of dry weight ‎of each sample. The average measured level of Fe, Zn, Cu, Pb, Mn and Cd for Solea ‎elongata was 38.716±11.321 μg g−1, 16.638±3.344 μg g−1, 1.067±0.404 μg g−1, ‎‎0.022±0.043 μg g−1, 0.273±0.100 μg g−1 and 0.022±0.010 μg g−1, respectively. Although ‎the contamination values obtained from Solea elongata are below the limits, it is ‎important to follow the metal accumulation values.‎
    • Amino acid content in muscle tissue of the brown ‎meagre, Sciaena umbra Linnaeus, ‎‎1758 (Pisces: ‎Sciaenidae) as candidate species for aquaculture ‎in the Black Sea, ‎Turkey.

      Bilgin, Özlem; Maviş, Murat Emrah; Göksu-Gürsu, Gökçe (2020-06-30)
      In order to understand the nutritive quality focusing on amino acid profiles in the muscle ‎of the brown meagre, Sciaena umbra, and to evaluate the potential of the species as a ‎diet source for both human consumption and as candidate species for aquaculture, the ‎main amino acid components in the muscle of this species were analyzed. Amino acid ‎compositions were determined with the LC-MS/MS (Liquid Chromatography Tandem ‎Mass Spectrometer) instrument. Although a total of thirty-nine amino acids were ‎detected / searched by LC-MS/MS instrument, only twenty-four amino acid values were ‎determined. Seven of these amino acids are essential amino acids (EAAs), two are semi-‎essential amino acids (SEAAs) and fifteen are non-essential amino acids (NEAAs). The ‎most abundant amino acids in brown meagre meat were found as glutamic acid ‎‎(13.88%), lysine (10.43%), aspartic acid (9.62%), leucine (8.32%), and glycine (6.87%), ‎respectively. These five amino acids accounted for more than 49% of the total amount ‎of amino acids. The levels of the total amino acids (ΣAA = 24.17 g/100g), total essential ‎amino acids (ΣEAA = 9.42 g/100g), total non-essential amino acids (ΣNEAA = 12.39 ‎g/100g), total semi-essential amino acids (ΣSEAA = 2.36 g/100g) for brown meagre in the ‎Black Sea were higher than those reported in the other areas. This study shows that the ‎brown meagre has high nutritional qualities and the results are also presented as an ‎important criterion for obtaining information on amino acid nutritional requirements for ‎aquaculture and healthy human food source for dietitians.‎
    • A primary study on the bioaccumulation of ‎metals in Stereoderma kirschbergi (Heller, ‎‎1868) ‎from Sinop coasts of the southern Black Sea‎.

      Bat‎, Levent; Arici, Elif; Öztekin, Aysah; Şahin, Fatih (2020-06-30)
      The amounts of toxic metals (Pb, Hg and Cd) in tissues of Stereoderma kirschbergi in the ‎Sinop coasts of the south of the Black Sea were measured for the first time. Toxic metal ‎analyses were made by the Inductively Coupled Plasma - Mass Spectrometer. The ‎general tendency in all metal concentrations in both sediment and sea cucumber samples ‎were Pb>Hg>Cd. The results demonstrated that the toxic metal concentrations in ‎sediments were higher than organisms. Pb values in the sediment and sea cucumber were ‎higher than Hg and Cd. The bio-sediment accumulation factors for Cd, Hg and Pb were ‎lower than 1. S. kirschbergi is considered as a de-concentrator.‎
    • Preliminary studies on induced asexual ‎reproduction in Holothuria atra and Holothuria ‎pardalis under laboratory ‎conditions.

      Ahmed, Quratulan; Ali, Qadeer Mohammad (2020-06-30)
      Asexual reproduction was observed in H. atra and H. pardalis during 20th November ‎‎2019 to 20th February 2020. Asexual reproduction is a common phenomena in sea ‎cucumbers (class Holothuroidea) and organisms are capable of regenerating completely ‎or partially after fission and evisceration. The present research is a first attempt/trial on ‎induce asexual reproduction in H.atra and H. pardalis under the laboratory conditions in ‎Pakistan. The induced asexual reproduction is of high significance in aquaculture of ‎holothuria and could lead towards commercial production. During the last two decades ‎sea cucumber fishing showed a trend of overexploitation because they are easy to catch ‎besides high market demand. Many countries including Australia, Papua New Guinea, ‎Mauritius and Venezuela have imposed prohibition on sea cucumber fishing due to ‎depletion of population in wild. The findings from present research will be substantive ‎addition to the knowledge in the field of aquaculture and will be valuable to marine ‎scientist and aquaculturist in their future research.‎
    • Report of the POGO Task Force on Ocean Biological Observations.

      Leinen, Margaret; Ausubel, Jesse; Jaffe, Jules; Scholin, Chris; Shirayama, Yoshihisa; Wilson, Willie; Chavez, Francisco; Davies, Neil; Robidart, Julie (Partnership for Observation of the Global Ocean (POGO)Plymouth, UK, 2018)
      This report consists of three sections and an appendix. Section I discusses the scientific and societal questions that require the development of large scale and/or long-term ocean biological observation capabilities and how POGO might assist the ocean observational community in developing this capability. Section II outlines the state of development of various ocean biological observation techniques and issues. Section III discusses some of the issues associated with the development of large scale and/or long term biological observations. Appendix I includes information and references used in our discussion and deliberation.
    • Notes on the first record of Tridacna noae (Röding, 1798) (Cardiidae: Tridacninae) in Palawan, Philippines.

      Ecube, Krizia Merly A; Villanueva, Elmer G; Dolorosa, Roger G; Cabaitan, Patrick C (2019)
      The first record of Tridacna noae in the province of Palawan, Philippines was documented on June 21, 2018, at Paraiso Resort, Albaguen Island, Port Barton in the municipality of San Vicente. The single specimen measured 4.5 cm in shell length and was partly buried in a massive coral rock. The mantle edge of the species is lined with teardrop-like patches with white margins. This recent finding is an addition to the seven previously reported giant clam species in Palawan and confirms new sighting location in the existing geographic range. The habitat of the species is a semi-protected cove, about 1 m deep at high tide, with massive coral rocks generally covered with the seaweed Sargassum spp. Potential threats include the shading effects of macro algae and the constant presence of tourists visiting the resort who might accidentally step on the clams. Buoy demarcation to exclude the area from disturbance may help protect the species and other boring giant clam species. Continued assessment may provide information on the status of T. noae in Palawan and in other parts of the country.
    • Road mortality of freshwater turtles in Palawan, Philippines

      Bernardo, Alejandro A Jr (2019-07-01)
      The impact of road mortality on freshwater turtle populations on a global scale could be significant enough to cause the extinction of sensitive species. Essential data on roadkill abundance, composition, spatial patterns, and temporal distribution is needed for crafting mitigation strategies. To provide such information, a survey was conducted along the highway section (67 km) connecting Aborlan and Puerto Princesa City in Palawan, Philippines. Collection of data was done four times a month from January 2010 to December 2015. A total of 127 road-killed turtles belonging to two species of the Geoemydidae family were recorded, 102 (80.3%) of which were classified as the Southeast Asian Box Turtle (Cuora amboinensis) and 25 (19.7%) were identified as the Asian Leaf Turtle (Cyclemys dentata). The increase in road traffic noticed during the survey period possibly caused the corresponding increase in the roadkill counts 0f C. amboinensis, which is a more common species. Concurrently, the decline in the road-kill counts of C. dentata may indicate a severe drop in the population of this less common species. Roadside habitat types, time of the day, and presence of water bodies are found to be important predictors of road-killed turtles. High densities of road-killed turtles clustered in short segments of the road which identified as hotspots. Effective mitigating measures to curve down the impact of road mortality on turtle populations must be implemented and focusing the conservation strategies along the hotspots is considered an efficient and practical option.
    • Elysia leucolegnote (Opistobranchia: Sacoglossa) Jensen 1990, a new record for the Verde Island Passage, Philippines

      Sanchez-Escalona, Katherine P (2019-07-01)
      Aggregations of Elysia leucolegnote were observed from Silonay Mangrove and Ecopark, Calapan, Oriental Mindoro, occurring on mudholes with water retained from retreating tide waters. The individuals in the aggregations has white markings on the parapodia and the rhinophores, and yellow marking on each quadrant of the body. This is the first report of the occurrence of the mangrove-associated species from the Philippines which increased the number of Elysia species records to 10 species.
    • Spatial and temporal distribution, Size composition, and Abundance of Oval squid, Sepioteuthis lessoniana (Lesson 1830) in the coastal waters of Bolong, Zamboanga City, Philippines

      Samson, Jesus Rolando A (2019-07-01)
      The study was conducted in the coastal waters of Bolong, Zamboanga City, Philippines purposely to determine the spatial distribution of Sepioteuthis lessoniana in relation to the depth of water and temporal distribution in relation to lunar phase using size composition and catch per unit effort (CPUE) data. Two sampling stations were established, namely, shallow-water station (Station 1) and deep-water station (Stations 2). Twenty units of squid traps were utilized in the study; ten of which were set in Station 1 and the other ten in Station 2. The traps were constructed using bamboo and green polyethylene netting. Instead of bait, coconut spikelet was placed inside the trap to lure squids. A motorized banca was used to set and haul the traps in the two sampling stations. Although hauling was done daily, sampling is scheduled only 12 times a month with three samplings per lunar phase. Catches were segregated according to sampling stations and lunar phases. Results of the study revealed that the squids caught in deeper waters were significantly larger than those caught in shallow waters, and that females dominated the shallow waters while males dominated the deeper waters. Furthermore, the catch during Full Moon was significantly higher than the catch of the other three lunar phases (p<0.05) with highest CPUE recorded in Station 2 during Full Moon (0.352 kg trap-1 day-1).
    • Molecular characterization and tissue distribution of cysteamine dioxygenase (ADO) in common carp Cyprinus carpio

      Gonzales-Plasus, Maria Mojena G; Haga, Yutaka; Kondo, Hidehiro; Hirono, Ikuo; Satoh, Shuichi (2019-07-01)
      The low production of hypotaurine from cysteine but a significantly high taurine deposition in common carp led to the hypothesis that this species utilizes an alternative pathway other than the cysteine sulfinic acid pathway. Cysteamine pathway is common in mammals but not in other animals such as birds, invertebrates, and fishes. The cloned cysteamine dioxygenase (ADO) cDNA in common carp consists of 790 nucleotide bases with 260 deduced amino acid sequence. The conserved domain is the DUF1637 which has a conserved tyrosine and cysteine residues and the presence of three predicted N-glycosylation sites. Phylogenetic analysis using neighbor joint method indicated that ADO in common carp branched after Sinocyclocheilus rhinocerous. ADO was expressed in hepatopancreas, brain, gill, intestine, and muscle of common carp. The hepatopacreas had a significantly higher gene expression level than the other organs examined. The present results suggest that ADO is present in common carp.
    • Backyard farming of tilapia using a biofloc-based culture system

      Caipang, Christopher Marlowe A; Avillanosa, Arlene L (2019-07-01)
      The pressures brought about by the increase in human population resulted in the rapid expansion of the food production industries including aquaculture to provide the nutritional requirements of the growing population. As aquaculture operations intensify, there is also an urgent need to preserve the environment; hence, all activities must be carried out in a sustainable way. The use of the biofloc technology (BFT) in aquaculture addresses these issues on restrictions on the usage of water and land as well as matters concerning sustainability of the production. BFT is a technique that maintains optimum water quality in the aquaculture system by manipulating the carbon and nitrogen ratios in the system. This optimum ratio favors the growth of heterotrophic bacteria that contribute in maintaining good water quality and at the same time provide sources of natural food for the cultured fish or crustaceans. In this review, the mechanisms of the biofloc technology particularly in the production of tilapia in freshwater systems are discussed. Moreover, some of the intrinsic advantages of this technology are highlighted in the context of developing and supporting backyard aquaculture of freshwater tilapias as a means of providing the food demands of the population in rural communities and as source of income for the marginalized small-scale fish farmers.