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  • Sex ratios of Metapenaeus kutchensis George, George and Rao, 1963 and Parapenaeopsis sculptilis (Heller, 1862) in the Gulf of Kachchh, Western India.

    Pravez, Rishad; Krishnan, Smita; Mansuri, A.P. (1992-06-30)
    Sex ratio data of two species of penaeid prawns Metapenaeus kutchensis George, George and Rao, ‎‎1963 and Parapenaeopsis sculptilis (Heller, 1862), occurring in the Gulf of Kachchh, were ‎statistically analyzed. A preponderance of females was observed in both the species and the ratio ‎of male to female for both years combined for M. kutchensis and P. sculptilis was found to be ‎‎1:1.5 and 1:2.7, respectively. Chi-square analysis revealed significant difference in the sex ratios of ‎the two species.‎
  • Re-description of Lupocyclus philippinensis (Crustacea: Decapoda: Brachyura: ‎Portunidae) Semper in Nauck, 1880 from the coastal waters of Karachi, Pakistan.‎

    Naz, Farah; Saher, Noor Us; Osmani, Hamid Badar (2019-12-31)
    A specimen of the Lupocyclus philippinensis Semper in Nauck, 1880 commonly known ‎as scissor swimming crab, was recently found in by catch of shrimp trawling and ‎included as part of continuous taxonomic studies on crabs found in the coastal waters of ‎Pakistan. The discovery is significant because it found after a long time. Redescription of ‎L. philippinensis following the discovery of a female caught at Karachi fish harbor, ‎Pakistan by Leene and Buitendijk (1952).‎
  • Community structure and seasonal distribution of intertidal macrofauna from two rocky ‎shores of Karachi coast.

    Ali, Qadeer Mohammad; Ghory‎, Farhana S.; Ahmed, Quratulan; Siddique, Saima; Mubarak, Shumaila; Memon, Sehrish (2019-12-31)
    Rocky shores are considered heterogeneous environments due to their composition and ‎structure. Therefore, they support numerous habitats for flora and fauna. Organisms ‎found on rocky shores are facing intense physicochemical conditions during tidal ‎changes from upper to lower intertidal zones. Total (N=1888) specimens were collected ‎on seasonal basis from intertidal zone during low tide from two rocky sites of Karachi ‎coast, Buleji and Sunehri during January 2017 to December 2017. The highest number ‎of individuals (N=1041), were recorded from Buleji than Sunehri (N= 847). The seasonal ‎abundance in Mollusca were measured as (36.84%), (63.67%), (25.08) and (40.38%) ‎from Buleji while from Sunehri (45.16 %), (46.01%), (48.65) and (42.79 %) during pre-‎monsoon, south-west monsoon, post monsoon and north-east monsoon season ‎respectively. Group Arthropoda, Mollusca and Echinodermata were shows the highest ‎abundance of the species at both sites as compare to other groups. The highest diversity ‎index from Sunehri (H'=0.64) was measured in north-east monsoon season meanwhile, ‎‎(H'=0.61) was measured in post monsoon season from Buleji coast. Evenness index ‎‎(J'=0.25) in pre-monsoon season from Buleji and (J'=0.28) in south-west monsoon season ‎from Sunehri coast . Season shows the great abundance of species as compare to other ‎seasons. No significant correlation was observed in between seasons, water temperature ‎and salinity with macrofauna groups at both sites. ‎
  • Empirical use of growth, mortality and temperature data for anchovy.

    Bilgin, Sabri (2019-12-31)
    To estimate the empirical relationships in anchovy, the instantaneous natural mortality ‎rate (M) calculated from von Bertalanffy Growth Function (VBGF) parameters, ‎maximum total length (Lmax) and sea surface temperature (T,°C) were reviewed in the ‎Black Sea. Empirical equations were presented for evaluation of M data in their ‎relationships to VBGF parameters, T and Lmax. Based on biological consideration and ‎regressional definition, it was recommended to use following formulas for estimating of ‎natural mortality rate of small pelagic fish such as anchovy. M = 0.3237 + 1.3174*(K) - ‎‎0.0036*(L∞) - 0.0117*(T); M = 0.2639 + 1.3676*(K) - 0.0003*(Lmax) - 0.0124*(T).‎
  • Artificial neural networks model biometric features of marine fish sand smelt.‎

    Benzer, Semra; Benzer, Recep (2019-12-31)
    In this study was investigated some biometric properties of the sand smelt with ANN’s, ‎Atherina boyeri Risso, 1810, population in Yamula Dam Lake. Twenty-three ‎morphometric characters of samples were measured. The total length of individuals ‎which were caught between 6.40 and 10.20 cm, and their weight (W) were ranged ‎between 1.50 and 7.31 g. The effect of Artificial Neural Networks was investigated in ‎predicting the statistical of fishery industry. The present study provides the first ‎information on the biometric properties of Atherina boyeri in Yamula Dam Lake by ‎Artificial Neural Networks.‎
  • Community structure and seasonal distribution of intertidal macrofauna from two rocky shores of Karachi coast

    Ali, Qadeer Mohammad; Ghory, Farhana S.; Ahmed, Quratulan; Siddique, Saima; Mubarak, Shumaila; Memon, Sehrish (2019)
    Rocky shores are considered heterogeneous environments due to their composition and structure. Therefore, they support numerous habitats for flora and fauna. Organisms found on rocky shores are facing intense physicochemical conditions during tidal changes from upper to lower intertidal zones. Total (N=1888) specimens were collected on seasonal basis from intertidal zone during low tide from two rocky sites of Karachi coast, Buleji and Sunehri during January 2017 to December 2017. The highest number of individuals (N=1041), were recorded from Buleji than Sunehri (N= 847). The seasonal abundance in Mollusca were measured as (36.84%), (63.67%), (25.08) and (40.38%) from Buleji while from Sunehri (45.16 %), (46.01%), (48.65) and (42.79 %) during pre-monsoon, south-west monsoon, post monsoon and north-east monsoon season respectively. Group Arthropoda, Mollusca and Echinodermata were shows the highest abundance of the species at both sites as compare to other groups. The highest diversity index from Sunehri (H'=0.64) was measured in north-east monsoon season meanwhile, (H'=0.61) was measured in post monsoon season from Buleji coast. Evenness index (J'=0.25) in pre-monsoon season from Buleji and (J'=0.28) in south-west monsoon season from Sunehri coast. Season shows the great abundance of species as compare to other seasons. No significant correlation was observed in between seasons, water temperature and salinity with macrofauna groups at both sites.
  • Artificial neural networks model biometric features of marine fish sand smelt

    Benzer, Semra; Benzer, Recep (2019)
    In this study was investigated some biometric properties of the sand smelt with ANN’s, Atherina boyeri Risso, 1810, population in Yamula Dam Lake. Twenty-three morphometric characters of samples were measured. The total length of individuals which were caught between 6.40 and 10.20 cm, and their weight (W) were ranged between 1.50 and 7.31 g. The effect of Artificial Neural Networks was investigated in predicting the statistical of fishery industry. The present study provides the first information on the biometric properties of Atherina boyeri in Yamula Dam Lake by Artificial Neural Networks.
  • Empirical use of growth, mortality and temperature data for anchovy

    Bilgin, Sabri (2019)
    To estimate the empirical relationships in anchovy, the instantaneous natural mortality rate (M) calculated from von Bertalanffy Growth Function (VBGF) parameters, maximum total length (Lmax) and sea surface temperature (T,°C) were reviewed in the Black Sea. Empirical equations were presented for evaluation of M data in their relationships to VBGF parameters, T and Lmax. Based on biological consideration and regressional definition, it was recommended to use following formulas for estimating of natural mortality rate of small pelagic fish such as anchovy. M = 0.3237 + 1.3174*(K) - 0.0036*(L∞) - 0.0117*(T); M = 0.2639 + 1.3676*(K) - 0.0003*(Lmax) - 0.0124*(T).
  • Re-description of Lupocyclus philippinensis (Crustacea: Decapoda: Brachyura: Portunidae) Semper in Nauck, 1880 from the coastal waters of Karachi, Pakistan

    Osmani, Hamid Badar; Naz, Farah; Saher, Noor Us (2019)
    A specimen of the Lupocyclus philippinensis Semper in Nauck, 1880 commonly known as scissor swimming crab, was recently found in by catch of shrimp trawling and included as part of continuous taxonomic studies on crabs found in the coastal waters of Pakistan. The discovery is significant because it found after a long time. Redescription of L. philippinensis following the discovery of a female caught at Karachi fish harbor, Pakistan by Leene and Buitendijk (1952).
  • Benthic assemblages for ecological evaluation of Bardawil Lagoon, Mediterranean Sea, Egypt

    El komi, Mohamed Mohamed (2019)
    Bardawil Lagoon is the only highly saline oligotrophic lagoon in Egypt, has an area of ca. 650 km2 with water depths ranged 0.3m to 3m and economically important in terms of fish production. It is the optimum zone getting migratory birds in winter. It is separated from the Mediterranean Sea by a narrow sandy shelf (90 km length, and 22 km width). Ecological evaluation of benthic communities in Bardawil Lagoon to follow-up study of the distribution of benthic study at 12 selected sampling sites representing different environmental habitats for long periods through the project of Environmental Study Wetlands OF North Egyptians Lakes where samples were collected seasonally (2010-2015) and semi-annually (2015 - 2019). The results and data analysis indicated that the distribution, composition and dominance of macro benthic organisms in Lake Bardawil were composed mainly of Ostracoda, Polychaeta, Sea grasses, Bivalvia, Insecta larvae communities and dominated the constituent of bottom fauna. The variations in the benthic biomass were the heaviest at sites elRaodh and meddle elRaodh representing 1354 and 1105 g/m2 which corresponding respectively to 18.2 % and 14.9% of the annual average of benthic biomass (619 g/m2). Regional variations abundance of the benthic structure was highest at sites elTelol and elRaodh representing 3486 ind/m2 and 3635 ind/m2 which corresponding respectively to 14.8% and 15.3% of the annual average of benthic density (1978 ind/m2). Sites of sampling study were evenly spread (J’ > 0.8) at most sites except at elTelol and elRaodh also, high diversity (H’ > 3.00) was at the most sites and show lower value at sites elTelol, elGals, Boughaz I, elNaser, and Raba`a while, Swartz Dominance indexes of number of 5 species over 75% showed low values at sites elGals, Boughaz I, elNaser, and Raba`a. The abiotic environmental effects in the Bardawil Lagoon are general to those generally observed in other areas influenced by organic wastes, namely, changed in the physic-chemical properties of the sediments and low oxygen concentrations in the bottom water due to decomposition of organic materials.
  • Biometric properties of euryhaline fish the sand smelt Atherina boyeri Risso, 1810

    Semra, Benzer (2019)
    In this study the presence of sand smelt Atherina boyeri Risso, 1810, an invasive and translocated species has been reported in the Hirfanlı Dam Lake, Turkey. The fish samples were collected from the fishermen operating in the area in April 2016. Twenty-three morphometric characteristics of A. boyeri, were taken, including standard length (SL), fork length (FL), total length (TL), preorbital distance, eye diameter, interorbital distance, head length, head width, dorsal fin I nose point distance, dorsal fin II nose point distance, preanal distance, prepectoral distance, preventral distance, dorsal fin I base length, dorsal fin II base length, anal fin base length, pectoral fin base length, ventral fin base length, maximum body height, caudal peduncle height, body width, caudal peduncle width, body weight (W). The SL varied between 62 to 75 mm and weight 2.324 to 4.133 g in females. Whereas in males the SL varied between 56 to78 mm and weight 1.533 to 4.011 g. The sex ratio was slightly in favour of females being 54.4%.
  • Feeding habits of pick handle barracuda (Sphyraena jello) Cuvier, 1829 along the coast of Pakistan

    Hina, Manzoor; Kashifa, Zohra; Hamid, Badar Osmany (2019)
    A one year combined study of both sexes was conducted from March 2017 to February 2018 to investigate the feeding habit of Pick handle Barracuda (Sphyraena jello) Cuvier, 1829 locally called as Safaid kund along the coast of Pakistan, a large species found in Pakistani water caught mainly by bottom set gillnet throughout the year. Samples studied at Karachi fish harbor, in commercial catch which is the major landing center of Pakistan. During this counting method was applied with naked eye. Mostly fishes characterized by 91.66%, cephalopod 5.66% and shrimp 2.78% made the highest and lowest stomach content respectively shoes carnivorous behavior of the species.
  • Determination of mercury (Hg) in two sea cucumber species Ohshimella ehrenbergii (Selenka, 1868) and Stolus buccalis (Stimpson, 1855) from the Karachi coast

    Quratulan, Ahmed; Levent, Bat; Qadeer, Mohammad Ali (2019)
    In this study the amounts of mercury (Hg) were determined in tentacles and muscle tissues of O. ehrenbergii and S. buccalis from two coastal sites of Karachi; Buleji and Sunehri during Southwest monsoon (August and September) and Northeast monsoon (December and January) seasons of the year 2018. The mean amounts of Hg in edible tissues of sea cucumbers were as follows: O. ehrenbergii (0.0176 mg/kg dry wt.) and S. buccalis (0.0155 mg/kg dry wt.). Hg amounts in muscles of both species are much lower than the maximum permissible limits (0.5 mg/kg wet wt.). Estimated Daily Intakes for adults consuming O. ehrenbergii and S. buccalis are lower than published RfD values. Total Target Hazard Quotient (TTHQ) values (0.00787) are also lower than 1, it may be concluded that the consumption of these sea cucumbers from Karachi, do not pose any health hazards to human as Hg amounts were concerned.
  • Comparative study of significant molluscans dwelling at two sites of Jiwani coast, Pakistan

    Ghani, Abdul; Nuzhat, Afsar; Riaz, Ahmed; Shees, Qadir; Saifullah, Saleh; Samroz, Majeed; Najeeb, Imam (2019)
    During the present study collectively eighty two (82) molluscan species have been explored from Bandri (25 04. 788 N; 61 45. 059 E) and Shapk beach (25 01. 885 N; 61 43. 682 E) of Jiwani coast. This study presents the first ever record of molluscan fauna from shapk beach of Jiwani. Amongst these fifty eight (58) species were found belonging to class gastropoda, twenty two (22) bivalves, one (1) scaphopod and one (1) polyplachopora comprised of thirty nine (39) families. Each collected samples was identified on species level as well as biometric data of certain species was calculated for both sites. Molluscan species similarity was also calculated between two sites. For gastropods it was remain 74 %, for bivalves 76 %, for Polyplacophora 100 % and for Scapophoda 0 %. Meanwhile total similarity of molluscan species between two sites was calculated 75 %. Notable identified species from Bandri and Shapak includes Oysters, Muricids, Babylonia shells, Trochids, Turbinids and shells belonging to Pinnidae, Arcidae, Veneridae families are of commercial significance which can be exploited for a variety of purposes like edible, ornamental, therapeutic, dye extraction, and in cement industry etc.
  • Morphometric characteristics of Indian mackerel (Rastrelliger kanagurta) landing at three fish harbors of Baluchistan, Pakistan

    Asif, Ali Roonjha; Azra, Bano; Saima, Siddique; Shazia, Rasheed (2019)
    In the present study fifteen morphometric characters of Indian mackerel, Rastrelliger kanagurta were studied. Collections were made from three fish harbors, Kund Malir, Sonmiani and Gadani, Baluchistan, Pakistan. The morphometric lengths (total length, fork length, standard length, head length, pre-dorsal fin length, pre-orbital length, eye diameter, lower-jaw length, pre-anal fin length, head depth, pectoral fin length, pelvic fin length, greatest depth and pre-pelvic fin length and pre-pectoral fin length) were recorded and the descriptive statistical parameters and correlation coefficient (r) were analysis with independent variable (total length) and dependent variable (other morphometric parameters). The result shows that morphometric parameters are highly correlated to total length. Coefficient of correlation (r) indicated highest positive correlation between total length and forked length (r = 0.961, r = 0.928 and r = 0.919 at Kund Malir, Sonmiani and Gadani, respectively).The maximum total lengths of R. kanagurta recorded in the present study were 26.1 cm at Kund Malir, 26.3 cm at Sonmiani and 29.0 cm at Gadani. This study provides knowledge to the biologists regarding morphometric characters of Indian mackerel, Rastrelliger kanagurta from the fish harbors of Baluchistan to help in planning of conservation strategies for this fish species.
  • Interspecific isozyme variability in Porcellanid crabs (Crustacea: Decapoda: Anomura) from the coastal waters of Pakistan

    Farah, Naz; Sahir, Odhano; Noor Us, Saher; Mustafa, Kamal (2019)
    Polyacrylamide gel electrophoresis was used to investigate the interspecific isozyme variability among three species of Porcellanid crabs: Petrolisthes ornatus, P. rufescens and P. boscii from the coastal waters of Karachi, Pakistan. Seven enzyme systems and the general protein (non-specific) were examined for genetic variations. Among the three species; Nei's heterozygosity for overall loci was observed (0.067), whereas Shannon’s information Index (I) for genetic variations based on the heterozygosity was (0.055) in three species of Genus Petrolisthes. Species were differentiated from each other as Nei’s genetic distance ranged in between 0.0093- 0.0314. The genetic relationship among the three species of genus Petrolisthes similar from those inferred from morphological features.
  • Comparison of metal uptake capacities of the brown algae Cystoseira barbata and Cystoseira crinita (Phaeophyceae) collected in Sinop, Turkey

    Elif, Arıcı; Levent, Bat; Gökhan, Yıldız (2019)
    Cystoseira barbata (Stackhouse) C. Agardh, 1820 and Cystoseira crinita Duby, 1830 widely distributed and dominant in the Black Sea collected from Sinop coastal zone to monitor the current situation of regional metal pollution during the 2015-2016. Macro-algae, sediments and seawater samples were analyzed for metal contents (Al, As, Cd, Co, Cu, Fe, Hg, Mn, Ni, Pb and Zn) using inductively coupled plasma mass spectrometry (ICP-MS). The methodology was provided by using standard reference material BCR 279 – Ulva lactuca. The general metal uptake of Cystoseira spp. displayed a tendency in the order of Hg<Cd<Co<Pb<Ni<Cu<As<Mn<Zn<Fe=Al. Accumulation of arsenic showed the highest levels in both seawater and sediments (BSAF>2 and BCF>5000) that was a good indicator for Cystoseira species. As a result of measured values, it is seen that Sinop region is below the pollution level. The observed results of the elemental accumulation noticed that Cystoseira spp. could be used regularly as a bio-monitor of coastal pollution in the study area.
  • Status and diversity of coastal avian fauna in Gwadar peninsula, Balochistan

    Gabol, Karim; Ahmed, Waqar; Rahim, Abdul; Shams, Zafar Iqbal; Zain, Z.; Batool, Atia (2018)
    The 1050 km long coastline of Pakistan, extends from Sir Creek in the southeast of Indus delta to Gwadar Bay in the west. This article is based on diversity, habitat, status and distribution of different species of coastal birds present in the Gwadar coast. Observation of birds was done during winter season at four different sites. The habitat is important for different coastal birds like terns, gulls, pelicans and waders including resident and migratory species. A total of 55 species were recorded from the entire area. The species richness was higher at two sites. The birds were seen in higher numbers at uninhabited points compared to those near the populated area or the port. Shannon diversity index for bird community was calculated for four sites namely Shabi Estuary, Gwadar East Bay, Gwadar West Bay and Gurab, where the diversity was found to be 2.82, 2.27, 2.33 and 2.40 respectively.Birds of Common Sandpiper (Actitishy poleucos), Common Teal (Anas crecca), Wigeon (Anas Penelope), Shoveller (Anas clypeata), Pochard (Aythya ferina), Common Coot (Fulica atra), Grey Plover (Pluvialis squatarola), Kentish Plover (Charadrius alexandriunus), Dusk Red Shank (Tringa erythropus) and Great White Pelicans (Pelecanus onocrotalus) have been recorded in large numbers during the study period. Some vulnerable species for e.g. Pochard (Aythya ferina) and endangered species for e.g. Great Knot (Calidris tenuirostris), Egyptian Vulture (Neophron percnopterus), and two near threatened species Oyster catcher (Haematus ostralegus) and Dalmation Pelican (Pelecanus crispus) were also recorded. The major threats to the ecosystem are habitat degradation due to port construction, urbanization, hunting, poaching and other anthropogenic activities.
  • Zonal diversity and community structure of invertebrate macrofauna in rocky intertidal area of Manora, Karachi, Pakistan

    Khanam, Safia; Saher, Noor Us (2018)
    Rocky shores are important ecosystems that supports the wide variety of plants and animals and are characterized by the zonation of species. This three months study was conducted in order to recognize the community structure and zonal distribution of macro fauna at the Manora rocky shore. The sampling was done monthly for three months in the year 2014 at three tidal zones, i.e. High tide zone, Mid tide zone and Low tide zone and a zonal comparison of fauna was performed to identify the distribution pattern of species during pre-monsoon season. A total 1318 individuals belonged to 68 species were identified and counted. The phylum Mollusca was the most diverse phylum which represented by 43 species, followed by Arthropods (16 species), Echinoderms (4 species), Annelids (2 species), Cnidarians (2 species) and Porifera (1 species). The highest faunal diversity (H’= 1.429) was observed at the low tide zone, but the diversity of molluscs was high (H’=1. 329) at the mid tide zone.
  • Concentration of heavy metals (Fe, Zn, Mn, Cu, Pb and Cd) in Otolithes ruber (Bloch and Schneider, 1801) from Damb Fish Landing Centre at Sonmiani, Makran coast, Pakistan

    Baloch, A.B.; Bat, Levent; Ali, Qadeer Mohammad; Ahmed, Quratulan (2018)
    Fish samples of Otolithes ruber (Bloch & Schneider, 1801) of various lengths (cm) and weight (g) were collected from Damb Fish Landing Centre at Sonmiani, Balochistan during 15th August 2009 to 15th April 2010. Total (56) fish samples were collected during the two major seasons Northeast Monsoon and Southwest Monsoon. The concentrations of Fe, Mn, Zn, Cu, Pb, and Cd were recorded in fish muscles. The mean concentration of Fe (4.23±1.38 μg/g), Mn (0.28±0.18 μg/g) and Cd (0.46±0.06 μg/g) were recorded in NE-monsoon. However Zn (3.34±1.19 μg/g), Cu (0.33±1.14 μg/g), and Pb (0.02±0.01 μg/g) showed highest concentration in SW-monsoon season. The results indicated that Fe concentrations were higher than other metals. Analysis of Variances (ANOVA) were performed in between seasons and metals, the significant difference was observed in Mn (P>0.01 at 0.05) and Pb (P>0.006 at 0.05) between seasons. The order of the metals in the fish samples based on concentrations in the tissues analyzed, as follows: Fe>Zn>Cu>Mn>Pb>Cd. Results concluded that the concentration of metals did not exceed the permissible limit of the food regulations of international standards. Hence there is no health hazards to humans consuming of O. ruber.

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